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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 <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2013-07-29 15:41:55 +02:00 committed by Pablo Neira Ayuso
parent 54e35cc523
commit c655bc6896
6 changed files with 14 additions and 40 deletions
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4
include/net/netfilter/nf_conntrack.h
View File

@ -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,

2
net/ipv4/netfilter/ipt_MASQUERADE.c
View File

@ -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;

2
net/ipv6/netfilter/ip6t_MASQUERADE.c
View File

@ -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;
}

36
net/netfilter/nf_conntrack_core.c
View File

@ -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;

4
net/netfilter/nf_conntrack_proto.c
View File

@ -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);

6
net/netfilter/nf_nat_core.c
View File

@ -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);
}