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netfilter: iptables: Add a .pre_exit hook in all iptable_foo.c. 

Using new helpers ipt_unregister_table_pre_exit() and
ipt_unregister_table_exit().

Fixes: b9e69e1273 ("netfilter: xtables: don't hook tables by default")
Signed-off-by: David Wilder <dwilder@us.ibm.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
David Wilder 2020-06-22 10:10:12 -07:00 committed by Pablo Neira Ayuso
parent 1cbf90985f
commit cf4cbc610b
5 changed files with 44 additions and 7 deletions
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10
net/ipv4/netfilter/iptable_filter.c
View File

@ -72,16 +72,24 @@ static int __net_init iptable_filter_net_init(struct net *net)
return 0;
}
static void __net_exit iptable_filter_net_pre_exit(struct net *net)
{
if (net->ipv4.iptable_filter)
ipt_unregister_table_pre_exit(net, net->ipv4.iptable_filter,
filter_ops);
}
static void __net_exit iptable_filter_net_exit(struct net *net)
{
if (!net->ipv4.iptable_filter)
return;
ipt_unregister_table(net, net->ipv4.iptable_filter, filter_ops);
ipt_unregister_table_exit(net, net->ipv4.iptable_filter);
net->ipv4.iptable_filter = NULL;
}
static struct pernet_operations iptable_filter_net_ops = {
.init = iptable_filter_net_init,
.pre_exit = iptable_filter_net_pre_exit,
.exit = iptable_filter_net_exit,
};

10
net/ipv4/netfilter/iptable_mangle.c
View File

@ -100,15 +100,23 @@ static int __net_init iptable_mangle_table_init(struct net *net)
return ret;
}
static void __net_exit iptable_mangle_net_pre_exit(struct net *net)
{
if (net->ipv4.iptable_mangle)
ipt_unregister_table_pre_exit(net, net->ipv4.iptable_mangle,
mangle_ops);
}
static void __net_exit iptable_mangle_net_exit(struct net *net)
{
if (!net->ipv4.iptable_mangle)
return;
ipt_unregister_table(net, net->ipv4.iptable_mangle, mangle_ops);
ipt_unregister_table_exit(net, net->ipv4.iptable_mangle);
net->ipv4.iptable_mangle = NULL;
}
static struct pernet_operations iptable_mangle_net_ops = {
.pre_exit = iptable_mangle_net_pre_exit,
.exit = iptable_mangle_net_exit,
};

10
net/ipv4/netfilter/iptable_nat.c
View File

@ -113,16 +113,22 @@ static int __net_init iptable_nat_table_init(struct net *net)
return ret;
}
static void __net_exit iptable_nat_net_pre_exit(struct net *net)
{
if (net->ipv4.nat_table)
ipt_nat_unregister_lookups(net);
}
static void __net_exit iptable_nat_net_exit(struct net *net)
{
if (!net->ipv4.nat_table)
return;
ipt_nat_unregister_lookups(net);
ipt_unregister_table(net, net->ipv4.nat_table, NULL);
ipt_unregister_table_exit(net, net->ipv4.nat_table);
net->ipv4.nat_table = NULL;
}
static struct pernet_operations iptable_nat_net_ops = {
.pre_exit = iptable_nat_net_pre_exit,
.exit = iptable_nat_net_exit,
};

10
net/ipv4/netfilter/iptable_raw.c
View File

@ -67,15 +67,23 @@ static int __net_init iptable_raw_table_init(struct net *net)
return ret;
}
static void __net_exit iptable_raw_net_pre_exit(struct net *net)
{
if (net->ipv4.iptable_raw)
ipt_unregister_table_pre_exit(net, net->ipv4.iptable_raw,
rawtable_ops);
}
static void __net_exit iptable_raw_net_exit(struct net *net)
{
if (!net->ipv4.iptable_raw)
return;
ipt_unregister_table(net, net->ipv4.iptable_raw, rawtable_ops);
ipt_unregister_table_exit(net, net->ipv4.iptable_raw);
net->ipv4.iptable_raw = NULL;
}
static struct pernet_operations iptable_raw_net_ops = {
.pre_exit = iptable_raw_net_pre_exit,
.exit = iptable_raw_net_exit,
};

11
net/ipv4/netfilter/iptable_security.c
View File

@ -62,16 +62,23 @@ static int __net_init iptable_security_table_init(struct net *net)
return ret;
}
static void __net_exit iptable_security_net_pre_exit(struct net *net)
{
if (net->ipv4.iptable_security)
ipt_unregister_table_pre_exit(net, net->ipv4.iptable_security,
sectbl_ops);
}
static void __net_exit iptable_security_net_exit(struct net *net)
{
if (!net->ipv4.iptable_security)
return;
ipt_unregister_table(net, net->ipv4.iptable_security, sectbl_ops);
ipt_unregister_table_exit(net, net->ipv4.iptable_security);
net->ipv4.iptable_security = NULL;
}
static struct pernet_operations iptable_security_net_ops = {
.pre_exit = iptable_security_net_pre_exit,
.exit = iptable_security_net_exit,
};