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Diffstat (limited to 'net/netfilter/nfnetlink.c')
-rw-r--r--net/netfilter/nfnetlink.c65
1 files changed, 42 insertions, 23 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index eedc0c1ac7a4..8eb0cc23ada3 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -40,7 +40,6 @@ MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_NETFILTER);
static char __initdata nfversion[] = "0.30";
-static struct sock *nfnl = NULL;
static const struct nfnetlink_subsystem *subsys_table[NFNL_SUBSYS_COUNT];
static DEFINE_MUTEX(nfnl_mutex);
@@ -101,34 +100,35 @@ nfnetlink_find_client(u_int16_t type, const struct nfnetlink_subsystem *ss)
return &ss->cb[cb_id];
}
-int nfnetlink_has_listeners(unsigned int group)
+int nfnetlink_has_listeners(struct net *net, unsigned int group)
{
- return netlink_has_listeners(nfnl, group);
+ return netlink_has_listeners(net->nfnl, group);
}
EXPORT_SYMBOL_GPL(nfnetlink_has_listeners);
-int nfnetlink_send(struct sk_buff *skb, u32 pid,
+int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid,
unsigned group, int echo, gfp_t flags)
{
- return nlmsg_notify(nfnl, skb, pid, group, echo, flags);
+ return nlmsg_notify(net->nfnl, skb, pid, group, echo, flags);
}
EXPORT_SYMBOL_GPL(nfnetlink_send);
-void nfnetlink_set_err(u32 pid, u32 group, int error)
+void nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error)
{
- netlink_set_err(nfnl, pid, group, error);
+ netlink_set_err(net->nfnl, pid, group, error);
}
EXPORT_SYMBOL_GPL(nfnetlink_set_err);
-int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags)
+int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u_int32_t pid, int flags)
{
- return netlink_unicast(nfnl, skb, pid, flags);
+ return netlink_unicast(net->nfnl, skb, pid, flags);
}
EXPORT_SYMBOL_GPL(nfnetlink_unicast);
/* Process one complete nfnetlink message. */
static int nfnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
+ struct net *net = sock_net(skb->sk);
const struct nfnl_callback *nc;
const struct nfnetlink_subsystem *ss;
int type, err;
@@ -170,7 +170,7 @@ replay:
if (err < 0)
return err;
- err = nc->call(nfnl, skb, nlh, (const struct nlattr **)cda);
+ err = nc->call(net->nfnl, skb, nlh, (const struct nlattr **)cda);
if (err == -EAGAIN)
goto replay;
return err;
@@ -184,26 +184,45 @@ static void nfnetlink_rcv(struct sk_buff *skb)
nfnl_unlock();
}
-static void __exit nfnetlink_exit(void)
+static int __net_init nfnetlink_net_init(struct net *net)
{
- printk("Removing netfilter NETLINK layer.\n");
- netlink_kernel_release(nfnl);
- return;
+ struct sock *nfnl;
+
+ nfnl = netlink_kernel_create(net, NETLINK_NETFILTER, NFNLGRP_MAX,
+ nfnetlink_rcv, NULL, THIS_MODULE);
+ if (!nfnl)
+ return -ENOMEM;
+ net->nfnl_stash = nfnl;
+ rcu_assign_pointer(net->nfnl, nfnl);
+ return 0;
}
-static int __init nfnetlink_init(void)
+static void __net_exit nfnetlink_net_exit_batch(struct list_head *net_exit_list)
{
- printk("Netfilter messages via NETLINK v%s.\n", nfversion);
+ struct net *net;
- nfnl = netlink_kernel_create(&init_net, NETLINK_NETFILTER, NFNLGRP_MAX,
- nfnetlink_rcv, NULL, THIS_MODULE);
- if (!nfnl) {
- printk(KERN_ERR "cannot initialize nfnetlink!\n");
- return -ENOMEM;
- }
+ list_for_each_entry(net, net_exit_list, exit_list)
+ rcu_assign_pointer(net->nfnl, NULL);
+ synchronize_net();
+ list_for_each_entry(net, net_exit_list, exit_list)
+ netlink_kernel_release(net->nfnl_stash);
+}
- return 0;
+static struct pernet_operations nfnetlink_net_ops = {
+ .init = nfnetlink_net_init,
+ .exit_batch = nfnetlink_net_exit_batch,
+};
+
+static int __init nfnetlink_init(void)
+{
+ printk("Netfilter messages via NETLINK v%s.\n", nfversion);
+ return register_pernet_subsys(&nfnetlink_net_ops);
}
+static void __exit nfnetlink_exit(void)
+{
+ printk("Removing netfilter NETLINK layer.\n");
+ unregister_pernet_subsys(&nfnetlink_net_ops);
+}
module_init(nfnetlink_init);
module_exit(nfnetlink_exit);