Add pernet_operations for ebt_log, in pernet_ops,
we call nf_log_set/unset to set/unset nf_loggers
of per net.
Because the syslog ns has not been implemented,
we don't want the container DDOS the host's syslog.
so only enable ebt_log in init_net and wait for
syslog ns.
Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
---
net/bridge/netfilter/ebt_log.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index 08e5ea5..cd465d1 100644
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -78,6 +78,10 @@ ebt_log_packet(u_int8_t pf, unsigned int hooknum,
const char *prefix)
{
unsigned int bitmask;
+ struct net *net = dev_net(in ? in : out);
+
+ if (!net_eq(net, &init_net))
+ return;
spin_lock_bh(&ebt_log_lock);
printk(KERN_SOH "%c%s IN=%s OUT=%s MAC source = %pM MAC dest = %pM proto = 0x%04x",
@@ -207,6 +211,22 @@ static struct nf_logger ebt_log_logger __read_mostly = {
.me = THIS_MODULE,
};
+static int __net_init ebt_log_net_init(struct net *net)
+{
+ nf_log_set(net, NFPROTO_BRIDGE, &ebt_log_logger);
+ return 0;
+}
+
+static void __net_exit ebt_log_net_fini(struct net *net)
+{
+ nf_log_unset(net, &ebt_log_logger);
+}
+
+static struct pernet_operations ebt_log_net_ops = {
+ .init = ebt_log_net_init,
+ .exit = ebt_log_net_fini,
+};
+
static int __init ebt_log_init(void)
{
int ret;
@@ -214,12 +234,14 @@ static int __init ebt_log_init(void)
ret = xt_register_target(&ebt_log_tg_reg);
if (ret < 0)
return ret;
+
nf_log_register(NFPROTO_BRIDGE, &ebt_log_logger);
- return 0;
+ return register_pernet_subsys(&ebt_log_net_ops);
}
static void __exit ebt_log_fini(void)
{
+ unregister_pernet_subsys(&ebt_log_net_ops);
nf_log_unregister(&ebt_log_logger);
xt_unregister_target(&ebt_log_tg_reg);
}
--
1.7.11.7
--
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