From c655bc6896b94ee0223393f26155c6daf1e2d148 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 29 Jul 2013 15:41:55 +0200 Subject: netfilter: nf_conntrack: don't send destroy events from iterator Let nf_ct_delete handle delivery of the DESTROY event. Based on earlier patch from Pablo Neira. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h index e5eb8b6..0c1288a 100644 --- a/include/net/netfilter/nf_conntrack.h +++ b/include/net/netfilter/nf_conntrack.h @@ -248,7 +248,9 @@ extern void nf_ct_untracked_status_or(unsigned long bits); /* Iterate over all conntracks: if iter returns true, it's deleted. */ extern void -nf_ct_iterate_cleanup(struct net *net, int (*iter)(struct nf_conn *i, void *data), void *data); +nf_ct_iterate_cleanup(struct net *net, + int (*iter)(struct nf_conn *i, void *data), + void *data, u32 portid, int report); extern void nf_conntrack_free(struct nf_conn *ct); extern struct nf_conn * nf_conntrack_alloc(struct net *net, u16 zone, diff --git a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c index 30e4de9..00352ce 100644 --- a/net/ipv4/netfilter/ipt_MASQUERADE.c +++ b/net/ipv4/netfilter/ipt_MASQUERADE.c @@ -118,7 +118,7 @@ static int masq_device_event(struct notifier_block *this, NF_CT_ASSERT(dev->ifindex != 0); nf_ct_iterate_cleanup(net, device_cmp, - (void *)(long)dev->ifindex); + (void *)(long)dev->ifindex, 0, 0); } return NOTIFY_DONE; diff --git a/net/ipv6/netfilter/ip6t_MASQUERADE.c b/net/ipv6/netfilter/ip6t_MASQUERADE.c index 47bff61..3e4e92d 100644 --- a/net/ipv6/netfilter/ip6t_MASQUERADE.c +++ b/net/ipv6/netfilter/ip6t_MASQUERADE.c @@ -76,7 +76,7 @@ static int masq_device_event(struct notifier_block *this, if (event == NETDEV_DOWN) nf_ct_iterate_cleanup(net, device_cmp, - (void *)(long)dev->ifindex); + (void *)(long)dev->ifindex, 0, 0); return NOTIFY_DONE; } diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 0934611..da6f178 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1246,7 +1246,7 @@ found: void nf_ct_iterate_cleanup(struct net *net, int (*iter)(struct nf_conn *i, void *data), - void *data) + void *data, u32 portid, int report) { struct nf_conn *ct; unsigned int bucket = 0; @@ -1254,7 +1254,7 @@ void nf_ct_iterate_cleanup(struct net *net, while ((ct = get_next_corpse(net, iter, data, &bucket)) != NULL) { /* Time to push up daises... */ if (del_timer(&ct->timeout)) - death_by_timeout((unsigned long)ct); + nf_ct_delete(ct, portid, report); /* ... else the timer will get him soon. */ @@ -1263,30 +1263,6 @@ void nf_ct_iterate_cleanup(struct net *net, } EXPORT_SYMBOL_GPL(nf_ct_iterate_cleanup); -struct __nf_ct_flush_report { - u32 portid; - int report; -}; - -static int kill_report(struct nf_conn *i, void *data) -{ - struct __nf_ct_flush_report *fr = (struct __nf_ct_flush_report *)data; - struct nf_conn_tstamp *tstamp; - - tstamp = nf_conn_tstamp_find(i); - if (tstamp && tstamp->stop == 0) - tstamp->stop = ktime_to_ns(ktime_get_real()); - - /* If we fail to deliver the event, death_by_timeout() will retry */ - if (nf_conntrack_event_report(IPCT_DESTROY, i, - fr->portid, fr->report) < 0) - return 1; - - /* Avoid the delivery of the destroy event in death_by_timeout(). */ - set_bit(IPS_DYING_BIT, &i->status); - return 1; -} - static int kill_all(struct nf_conn *i, void *data) { return 1; @@ -1304,11 +1280,7 @@ EXPORT_SYMBOL_GPL(nf_ct_free_hashtable); void nf_conntrack_flush_report(struct net *net, u32 portid, int report) { - struct __nf_ct_flush_report fr = { - .portid = portid, - .report = report, - }; - nf_ct_iterate_cleanup(net, kill_report, &fr); + nf_ct_iterate_cleanup(net, kill_all, NULL, portid, report); } EXPORT_SYMBOL_GPL(nf_conntrack_flush_report); @@ -1389,7 +1361,7 @@ void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list) i_see_dead_people: busy = 0; list_for_each_entry(net, net_exit_list, exit_list) { - nf_ct_iterate_cleanup(net, kill_all, NULL); + nf_ct_iterate_cleanup(net, kill_all, NULL, 0, 0); nf_ct_release_dying_list(net); if (atomic_read(&net->ct.count) != 0) busy = 1; diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 0ab9636..ce30041 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -281,7 +281,7 @@ void nf_ct_l3proto_pernet_unregister(struct net *net, nf_ct_l3proto_unregister_sysctl(net, proto); /* Remove all contrack entries for this protocol */ - nf_ct_iterate_cleanup(net, kill_l3proto, proto); + nf_ct_iterate_cleanup(net, kill_l3proto, proto, 0, 0); } EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister); @@ -476,7 +476,7 @@ void nf_ct_l4proto_pernet_unregister(struct net *net, nf_ct_l4proto_unregister_sysctl(net, pn, l4proto); /* Remove all contrack entries for this protocol */ - nf_ct_iterate_cleanup(net, kill_l4proto, l4proto); + nf_ct_iterate_cleanup(net, kill_l4proto, l4proto, 0, 0); } EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_unregister); diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c index 038eee5..6ff8083 100644 --- a/net/netfilter/nf_nat_core.c +++ b/net/netfilter/nf_nat_core.c @@ -497,7 +497,7 @@ static void nf_nat_l4proto_clean(u8 l3proto, u8 l4proto) rtnl_lock(); for_each_net(net) - nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean); + nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean, 0, 0); rtnl_unlock(); } @@ -511,7 +511,7 @@ static void nf_nat_l3proto_clean(u8 l3proto) rtnl_lock(); for_each_net(net) - nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean); + nf_ct_iterate_cleanup(net, nf_nat_proto_remove, &clean, 0, 0); rtnl_unlock(); } @@ -749,7 +749,7 @@ static void __net_exit nf_nat_net_exit(struct net *net) { struct nf_nat_proto_clean clean = {}; - nf_ct_iterate_cleanup(net, &nf_nat_proto_remove, &clean); + nf_ct_iterate_cleanup(net, &nf_nat_proto_remove, &clean, 0, 0); synchronize_rcu(); nf_ct_free_hashtable(net->ct.nat_bysource, net->ct.nat_htable_size); } -- cgit v0.10.2