Hello,
On Sun, 20 Sep 2015, Eric W. Biederman wrote:
> I am gradually working my way through the netfilter stack passing struct
> down into the netfilter hooks and from the netfilter hooks and from
> there down into the functions that actually care. This removes the need
> for netfilter functions to guess how to figure out how to compute which
> network namespace they are in and instead provides a simple and reliable
> method to do so.
>
> The cleanups stand on their own but this is part of a larger effort
> to have routes with an output device that is not in the current network
> namespace.
>
> The IPVS code has been a bit more of a challenge than most. Just
> passing struct net through to where it is needed did not feel clean
> to me. The practical issue is that the ipvs code in most places
> actually wants struct netns_ipvs and not struct net.
>
> So as part of this process I have turned the relationship between struct
> net and the structs netns_ipvs, ip_vs_conn_param, ip_vs_conn, and
> ip_vs_service inside out. I have modified the ipvs functions to take a
> struct netns_ipvs not a struct net. The net is code with fewer
> conversions from one type of structure to another. I did wind up adding
> a struct netns_ipvs parameter to quite a few functions that did not have
> it before so I could pass the structure down from the netfilter hooks to
> where it is actually needed to avoid guessing.
>
> I have broken up the work in a bunch of small patches so there is at
> least a chance and reviewing that each step I took is correct. The
> series compiles at each step so bisecting it should not be a problem
> if something weird comes up.
>
> The first two changes in this series are actually bug fixes. The first
> is a compile fix for a bug in sctp that came in, in the last round of
> ipvs changes merged into nf-next. The second fixes an older bug where
> in pathological circumstances the wrong network namespace could be used
> when a proc file is written to.
>
> The rest of the patchset is a bunch of boring changes getting pushing
> struct netns_ipvs (and by extension ipvs->net) where it needs to be.
> Either by replacing struct net pointers or adding new struct netns_ipvs
> pointers. With a handful of other minor cleanups (like removing skb_net).
I reviewed the patchset. Nice work, thanks!
Here are some comments:
01/84 ipvs: Hoist computation of ipvs earlier in sctp_conn_schedule
Simon had a fix for this problem, not sure what happened,
may be it was lost...
04/84 ipvs: Store ipvs not net in struct ip_vs_conn
Lost '!' here:
@@ -359,7 +359,7 @@ struct ip_vs_conn *ip_vs_ct_in_get(const struct
ip_vs_conn_param *p)
hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[hash], c_list) {
if (unlikely(p->pe_data && p->pe->ct_match)) {
- if (!ip_vs_conn_net_eq(cp, p->net))
+ if (net_eq(cp->ipvs->net, p->net))
continue;
Problem is then propagated to patch 05/84:
- if (net_eq(cp->ipvs->net, p->net))
+ if (cp->ipvs == p->ipvs)
26/84 ipvs: Pass ipvs not net to __ip_vs_get_servie_entries
Missing 'c' in Subject
55/84 ipvs: Pass ipvs not net to register_ip_vs_app and
unregister_ip_vs_app
Empty line after ipvs declaration:
void __net_exit ip_vs_app_net_cleanup(struct net *net)
{
- unregister_ip_vs_app(net, NULL /* all */);
+ struct netns_ipvs *ipvs = net_ipvs(net);
+ unregister_ip_vs_app(ipvs, NULL /* all */);
here too:
static void __ip_vs_ftp_exit(struct net *net)
{
- unregister_ip_vs_app(net, &ip_vs_ftp);
+ struct netns_ipvs *ipvs = net_ipvs(net);
+ if (!ipvs)
61/84 ipvs: Pass ipvs into .conn_in_get and ip_vs_conn_in_get_proto
"dreive"
62/84 ipvs: Pass ipvs into conn_out_get
"dreive"
Also, scripts/checkpatch.pl --strict /tmp/*.patch gives
me warnings, sometimes for inherited syntax...
Regards
--
Julian Anastasov <ja@xxxxxx>
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