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On Tue, Apr 28, 2009 at 01:30:26PM +0200, Fabien Duchêne wrote:
> Simon Horman a écrit :
> > On Tue, Apr 28, 2009 at 07:23:55PM +1000, Simon Horman wrote:
> >> On Tue, Apr 28, 2009 at 11:07:40AM +0200, Jan Engelhardt wrote:
> >>> On Tuesday 2009-04-28 10:15, Simon Horman wrote:
> >>>> It seems to me that it should be easy enough to fix by changing
> >>>> fwmark in ip_vs_sched_persist() from:
> >>>>
> >>>> union nf_inet_addr fwmark = {
> >>>> .all = { 0, 0, 0, htonl(svc->fwmark) }
> >>>> };
> >>>>
> >>>> to:
> >>>>
> >>>> union nf_inet_addr fwmark = {
> >>>> .all = { htonl(svc->fwmark), 0, 0, 0 }
> >>>> };
> >>>>
> >>>> Assuming that this would result in fwmark->ip being set to
> >>>> htonl(svc->fwmark), which is relevant if svc->af is AF_INET - that is,
> >>>> for IPv4.[...]
> >>>> An alternate idea would be to change the af value used for fwmarks,
> >>>> but this seems to be even less clean than the current (slightly broken)
> >>>> technique of using nf_inet_addr for IPv4 or IPv6 addresses, or fwmarks.
> >>> If you use ->all, then using NFPROTO_UNSPEC as af
> >>> seems to me like a good match.
> >
> > I am guessing that AF_UNSPEC is more appropriate than NFPROTO_UNSPEC.
> > Please correct me if I am wrong.
> >
> >> That seems reasonable, though ip_vs_ct_in_get() would still
> >> need to use the real af for the cp->af == af and
> >> ip_vs_addr_equal(af, s_addr, &cp->caddr) portinos of the check.
> >
> > It looks like checking for proto == IPPROTO_IP can tell us if
> > the destination is a fwmark. This is based on the assumption that
> > iph.protocol can never be IPPROTO_IP in ip_vs_sched_persist().
> >
> > The following patch expresses these ideas as they crrently stand.
> > Fabien, is it possible for you to test this?
> >
> Yep!
>
> I'll do it right now.
Hi Fabien,
did you get a chance to test this?
> > Index: net-next-2.6/net/netfilter/ipvs/ip_vs_conn.c
> > ===================================================================
> > --- net-next-2.6.orig/net/netfilter/ipvs/ip_vs_conn.c 2009-04-28
> > 20:37:48.000000000 +1000
> > +++ net-next-2.6/net/netfilter/ipvs/ip_vs_conn.c 2009-04-28
> > 20:37:51.000000000 +1000
> > @@ -260,7 +260,10 @@ struct ip_vs_conn *ip_vs_ct_in_get
> > list_for_each_entry(cp, &ip_vs_conn_tab[hash], c_list) {
> > if (cp->af == af &&
> > ip_vs_addr_equal(af, s_addr, &cp->caddr) &&
> > - ip_vs_addr_equal(af, d_addr, &cp->vaddr) &&
> > + /* protocol should only be IPPROTO_IP if
> > + * d_addr is a fwmark */
> > + ip_vs_addr_equal(protocol == IPPROTO_IP ? AF_UNSPEC : af,
> > + d_addr, &cp->vaddr) &&
> > s_port == cp->cport && d_port == cp->vport &&
> > cp->flags & IP_VS_CONN_F_TEMPLATE &&
> > protocol == cp->protocol) {
> > @@ -698,7 +701,9 @@ ip_vs_conn_new(int af, int proto, const
> > cp->cport = cport;
> > ip_vs_addr_copy(af, &cp->vaddr, vaddr);
> > cp->vport = vport;
> > - ip_vs_addr_copy(af, &cp->daddr, daddr);
> > + /* proto should only be IPPROTO_IP if d_addr is a fwmark */
> > + ip_vs_addr_copy(proto == IPPROTO_IP ? AF_UNSPEC : af,
> > + &cp->daddr, daddr);
> > cp->dport = dport;
> > cp->flags = flags;
> > spin_lock_init(&cp->lock);
> > Index: net-next-2.6/net/netfilter/ipvs/ip_vs_core.c
> > ===================================================================
> > --- net-next-2.6.orig/net/netfilter/ipvs/ip_vs_core.c 2009-04-28
> > 20:37:48.000000000 +1000
> > +++ net-next-2.6/net/netfilter/ipvs/ip_vs_core.c 2009-04-28
> > 20:37:51.000000000 +1000
> > @@ -278,7 +278,7 @@ ip_vs_sched_persist(struct ip_vs_service
> > */
> > if (svc->fwmark) {
> > union nf_inet_addr fwmark = {
> > - .all = { 0, 0, 0, htonl(svc->fwmark) }
> > + .ip = htonl(svc->fwmark)
> > };
> >
> > ct = ip_vs_ct_in_get(svc->af, IPPROTO_IP, &snet, 0,
> > @@ -306,7 +306,7 @@ ip_vs_sched_persist(struct ip_vs_service
> > */
> > if (svc->fwmark) {
> > union nf_inet_addr fwmark = {
> > - .all = { 0, 0, 0, htonl(svc->fwmark) }
> > + .ip = htonl(svc->fwmark)
> > };
> >
> > ct = ip_vs_conn_new(svc->af, IPPROTO_IP,
> >
> >
--
Simon Horman
VA Linux Systems Japan K.K. Satellite Lab in Sydney, Australia
H: www.vergenet.net/~horms/ W: www.valinux.co.jp/en
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