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netfilter: ebt_log: add net namespace support for ebt_log 

Add pernet support to ebt_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>
This commit is contained in:
Gao feng 2013-03-24 23:50:41 +00:00 committed by Pablo Neira Ayuso
parent 30e0c6a6be
commit 7d2789246c
1 changed files with 35 additions and 2 deletions
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37
net/bridge/netfilter/ebt_log.c
View File

@ -78,6 +78,11 @@ ebt_log_packet(u_int8_t pf, unsigned int hooknum,
const char *prefix)
{
unsigned int bitmask;
struct net *net = dev_net(in ? in : out);
/* FIXME: Disabled from containers until syslog ns is supported */
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",
@ -207,19 +212,47 @@ 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;
ret = register_pernet_subsys(&ebt_log_net_ops);
if (ret < 0)
goto err_pernet;
ret = xt_register_target(&ebt_log_tg_reg);
if (ret < 0)
return ret;
goto err_target;
nf_log_register(NFPROTO_BRIDGE, &ebt_log_logger);
return 0;
return ret;
err_target:
unregister_pernet_subsys(&ebt_log_net_ops);
err_pernet:
return ret;
}
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);
}