Hello, On Thu, 2 Sep 2010, Simon Horman wrote: > From: Julian Anastasov <ja@xxxxxx> > > Fix Passive FTP problem in ip_vs_ftp: > > - Do not oops in nf_nat_set_seq_adjust (adjust_tcp_sequence) when > iptable_nat module is not loaded > > Signed-off-by: Julian Anastasov <ja@xxxxxx> > Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx> > > --- > > Dave, this patch fixes a regression since 2.6.35 so please consider it for net. > Julian has also found another regression, but the fix is a bit > more complex so I have posted it to the netfilter list for review. Just to clarify that both patches for ip_vs_ftp are only for code that come in 2.6.36-rc, 2.6.35 is ok and does not need them. The other problem is that 2.6.36-rc comes with requirement IPVS to keep netfilter conntracks for all connections, eg. DirectRouting, not only for LVS-NAT (ip_vs_ftp). I have a bigger patch to make the IPVS conntracking support an option (enabled by default only for ip_vs_ftp) but may be it is not appropriate for -rc series. So, for now we are fixing just the fatal problems but the risk of IPVS setups with low nf_conntrack_max value to stop processing high loads remains without making the conntrack support an option. Before now all conntracks were created and destroyed for every packet and nf_conntrack_max, even if low, probably is never reached. > http://marc.info/?l=netfilter-devel&m=128339248723532&w=2 > > This change (and the other one) is also applicable to net-next, although > there is some diff noise. Do you want me to resolve that and post a > net-next version separately? > > --- v2.6.36-rc2/linux/net/netfilter/ipvs/ip_vs_ftp.c 2010-09-02 00:45:54.000000000 +0300 > +++ linux/net/netfilter/ipvs/ip_vs_ftp.c 2010-09-02 02:12:52.000000000 +0300 > @@ -45,6 +45,7 @@ > #include <linux/netfilter.h> > #include <net/netfilter/nf_conntrack.h> > #include <net/netfilter/nf_conntrack_expect.h> > +#include <net/netfilter/nf_nat.h> > #include <net/netfilter/nf_nat_helper.h> > #include <linux/gfp.h> > #include <net/protocol.h> > @@ -359,7 +360,7 @@ static int ip_vs_ftp_out(struct ip_vs_ap > buf_len = strlen(buf); > > ct = nf_ct_get(skb, &ctinfo); > - if (ct && !nf_ct_is_untracked(ct)) { > + if (ct && !nf_ct_is_untracked(ct) && nfct_nat(ct)) { > /* If mangling fails this function will return 0 > * which will cause the packet to be dropped. > * Mangling can only fail under memory pressure, Regards -- Julian Anastasov <ja@xxxxxx> -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
