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authorGao feng <gaofeng@cn.fujitsu.com>2013-03-24 23:50:42 +0000
committerPablo Neira Ayuso <pablo@netfilter.org>2013-04-05 20:58:45 +0200
commit69b34fb996b2eee3970548cf6eb516d3ecb5eeed (patch)
treeb27bed5830353509b8b6ddfa16b231b65a113873 /net/netfilter/xt_LOG.c
parent7d2789246cc9423d66d903f992d13a022710592a (diff)
netfilter: xt_LOG: add net namespace support for xt_LOG
Add pernet support to xt_LOG by means of the new nf_log_set function added in (30e0c6a netfilter: nf_log: prepare net namespace support for loggers). Since syslog ns has yet not been implemented, we don't want the containers to DDOS host's syslogd. So only enable ebt_log only from init_net and wait for syslog ns support Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/xt_LOG.c')
-rw-r--r--net/netfilter/xt_LOG.c52
1 files changed, 49 insertions, 3 deletions
diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c
index fa40096940a1..fe573f6c9e91 100644
--- a/net/netfilter/xt_LOG.c
+++ b/net/netfilter/xt_LOG.c
@@ -474,7 +474,14 @@ ipt_log_packet(u_int8_t pf,
const struct nf_loginfo *loginfo,
const char *prefix)
{
- struct sbuff *m = sb_open();
+ struct sbuff *m;
+ struct net *net = dev_net(in ? in : out);
+
+ /* FIXME: Disabled from containers until syslog ns is supported */
+ if (!net_eq(net, &init_net))
+ return;
+
+ m = sb_open();
if (!loginfo)
loginfo = &default_loginfo;
@@ -798,7 +805,14 @@ ip6t_log_packet(u_int8_t pf,
const struct nf_loginfo *loginfo,
const char *prefix)
{
- struct sbuff *m = sb_open();
+ struct sbuff *m;
+ struct net *net = dev_net(in ? in : out);
+
+ /* FIXME: Disabled from containers until syslog ns is supported */
+ if (!net_eq(net, &init_net))
+ return;
+
+ m = sb_open();
if (!loginfo)
loginfo = &default_loginfo;
@@ -893,23 +907,55 @@ static struct nf_logger ip6t_log_logger __read_mostly = {
};
#endif
+static int __net_init log_net_init(struct net *net)
+{
+ nf_log_set(net, NFPROTO_IPV4, &ipt_log_logger);
+#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
+ nf_log_set(net, NFPROTO_IPV6, &ip6t_log_logger);
+#endif
+ return 0;
+}
+
+static void __net_exit log_net_exit(struct net *net)
+{
+ nf_log_unset(net, &ipt_log_logger);
+#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
+ nf_log_unset(net, &ip6t_log_logger);
+#endif
+}
+
+static struct pernet_operations log_net_ops = {
+ .init = log_net_init,
+ .exit = log_net_exit,
+};
+
static int __init log_tg_init(void)
{
int ret;
+ ret = register_pernet_subsys(&log_net_ops);
+ if (ret < 0)
+ goto err_pernet;
+
ret = xt_register_targets(log_tg_regs, ARRAY_SIZE(log_tg_regs));
if (ret < 0)
- return ret;
+ goto err_target;
nf_log_register(NFPROTO_IPV4, &ipt_log_logger);
#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
nf_log_register(NFPROTO_IPV6, &ip6t_log_logger);
#endif
return 0;
+
+err_target:
+ unregister_pernet_subsys(&log_net_ops);
+err_pernet:
+ return ret;
}
static void __exit log_tg_exit(void)
{
+ unregister_pernet_subsys(&log_net_ops);
nf_log_unregister(&ipt_log_logger);
#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
nf_log_unregister(&ip6t_log_logger);