aboutsummaryrefslogtreecommitdiff
path: root/net/l2tp/l2tp_ip6.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/l2tp/l2tp_ip6.c')
-rw-r--r--net/l2tp/l2tp_ip6.c123
1 files changed, 93 insertions, 30 deletions
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index d217ff1f229e..f4c1da070826 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -22,6 +22,8 @@
#include <net/tcp_states.h>
#include <net/protocol.h>
#include <net/xfrm.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
#include <net/transp_v6.h>
#include <net/addrconf.h>
@@ -29,6 +31,14 @@
#include "l2tp_core.h"
+/* per-net private data for this module */
+static unsigned int l2tp_ip6_net_id;
+struct l2tp_ip6_net {
+ rwlock_t l2tp_ip6_lock;
+ struct hlist_head l2tp_ip6_table;
+ struct hlist_head l2tp_ip6_bind_table;
+};
+
struct l2tp_ip6_sock {
/* inet_sock has to be the first member of l2tp_ip6_sock */
struct inet_sock inet;
@@ -39,23 +49,25 @@ struct l2tp_ip6_sock {
struct ipv6_pinfo inet6;
};
-static DEFINE_RWLOCK(l2tp_ip6_lock);
-static struct hlist_head l2tp_ip6_table;
-static struct hlist_head l2tp_ip6_bind_table;
-
-static inline struct l2tp_ip6_sock *l2tp_ip6_sk(const struct sock *sk)
+static struct l2tp_ip6_sock *l2tp_ip6_sk(const struct sock *sk)
{
return (struct l2tp_ip6_sock *)sk;
}
+static struct l2tp_ip6_net *l2tp_ip6_pernet(const struct net *net)
+{
+ return net_generic(net, l2tp_ip6_net_id);
+}
+
static struct sock *__l2tp_ip6_bind_lookup(const struct net *net,
const struct in6_addr *laddr,
const struct in6_addr *raddr,
int dif, u32 tunnel_id)
{
+ struct l2tp_ip6_net *pn = l2tp_ip6_pernet(net);
struct sock *sk;
- sk_for_each_bound(sk, &l2tp_ip6_bind_table) {
+ sk_for_each_bound(sk, &pn->l2tp_ip6_bind_table) {
const struct in6_addr *sk_laddr = inet6_rcv_saddr(sk);
const struct in6_addr *sk_raddr = &sk->sk_v6_daddr;
const struct l2tp_ip6_sock *l2tp = l2tp_ip6_sk(sk);
@@ -123,6 +135,7 @@ found:
static int l2tp_ip6_recv(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
+ struct l2tp_ip6_net *pn;
struct sock *sk;
u32 session_id;
u32 tunnel_id;
@@ -131,6 +144,8 @@ static int l2tp_ip6_recv(struct sk_buff *skb)
struct l2tp_tunnel *tunnel = NULL;
struct ipv6hdr *iph;
+ pn = l2tp_ip6_pernet(net);
+
if (!pskb_may_pull(skb, 4))
goto discard;
@@ -162,7 +177,7 @@ static int l2tp_ip6_recv(struct sk_buff *skb)
goto discard_sess;
l2tp_recv_common(session, skb, ptr, optr, 0, skb->len);
- l2tp_session_dec_refcount(session);
+ l2tp_session_put(session);
return 0;
@@ -177,15 +192,15 @@ pass_up:
tunnel_id = ntohl(*(__be32 *)&skb->data[4]);
iph = ipv6_hdr(skb);
- read_lock_bh(&l2tp_ip6_lock);
+ read_lock_bh(&pn->l2tp_ip6_lock);
sk = __l2tp_ip6_bind_lookup(net, &iph->daddr, &iph->saddr,
inet6_iif(skb), tunnel_id);
if (!sk) {
- read_unlock_bh(&l2tp_ip6_lock);
+ read_unlock_bh(&pn->l2tp_ip6_lock);
goto discard;
}
sock_hold(sk);
- read_unlock_bh(&l2tp_ip6_lock);
+ read_unlock_bh(&pn->l2tp_ip6_lock);
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_put;
@@ -195,7 +210,7 @@ pass_up:
return sk_receive_skb(sk, skb, 1);
discard_sess:
- l2tp_session_dec_refcount(session);
+ l2tp_session_put(session);
goto discard;
discard_put:
@@ -208,21 +223,25 @@ discard:
static int l2tp_ip6_hash(struct sock *sk)
{
+ struct l2tp_ip6_net *pn = l2tp_ip6_pernet(sock_net(sk));
+
if (sk_unhashed(sk)) {
- write_lock_bh(&l2tp_ip6_lock);
- sk_add_node(sk, &l2tp_ip6_table);
- write_unlock_bh(&l2tp_ip6_lock);
+ write_lock_bh(&pn->l2tp_ip6_lock);
+ sk_add_node(sk, &pn->l2tp_ip6_table);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
}
return 0;
}
static void l2tp_ip6_unhash(struct sock *sk)
{
+ struct l2tp_ip6_net *pn = l2tp_ip6_pernet(sock_net(sk));
+
if (sk_unhashed(sk))
return;
- write_lock_bh(&l2tp_ip6_lock);
+ write_lock_bh(&pn->l2tp_ip6_lock);
sk_del_node_init(sk);
- write_unlock_bh(&l2tp_ip6_lock);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
}
static int l2tp_ip6_open(struct sock *sk)
@@ -236,24 +255,29 @@ static int l2tp_ip6_open(struct sock *sk)
static void l2tp_ip6_close(struct sock *sk, long timeout)
{
- write_lock_bh(&l2tp_ip6_lock);
+ struct l2tp_ip6_net *pn = l2tp_ip6_pernet(sock_net(sk));
+
+ write_lock_bh(&pn->l2tp_ip6_lock);
hlist_del_init(&sk->sk_bind_node);
sk_del_node_init(sk);
- write_unlock_bh(&l2tp_ip6_lock);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
sk_common_release(sk);
}
static void l2tp_ip6_destroy_sock(struct sock *sk)
{
- struct l2tp_tunnel *tunnel = l2tp_sk_to_tunnel(sk);
+ struct l2tp_tunnel *tunnel;
lock_sock(sk);
ip6_flush_pending_frames(sk);
release_sock(sk);
- if (tunnel)
+ tunnel = l2tp_sk_to_tunnel(sk);
+ if (tunnel) {
l2tp_tunnel_delete(tunnel);
+ l2tp_tunnel_put(tunnel);
+ }
}
static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
@@ -262,11 +286,14 @@ static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_l2tpip6 *addr = (struct sockaddr_l2tpip6 *)uaddr;
struct net *net = sock_net(sk);
+ struct l2tp_ip6_net *pn;
__be32 v4addr = 0;
int bound_dev_if;
int addr_type;
int err;
+ pn = l2tp_ip6_pernet(net);
+
if (addr->l2tp_family != AF_INET6)
return -EINVAL;
if (addr_len < sizeof(*addr))
@@ -324,10 +351,10 @@ static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
}
rcu_read_unlock();
- write_lock_bh(&l2tp_ip6_lock);
+ write_lock_bh(&pn->l2tp_ip6_lock);
if (__l2tp_ip6_bind_lookup(net, &addr->l2tp_addr, NULL, bound_dev_if,
addr->l2tp_conn_id)) {
- write_unlock_bh(&l2tp_ip6_lock);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
err = -EADDRINUSE;
goto out_unlock;
}
@@ -340,9 +367,9 @@ static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
l2tp_ip6_sk(sk)->conn_id = addr->l2tp_conn_id;
- sk_add_bind_node(sk, &l2tp_ip6_bind_table);
+ sk_add_bind_node(sk, &pn->l2tp_ip6_bind_table);
sk_del_node_init(sk);
- write_unlock_bh(&l2tp_ip6_lock);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
sock_reset_flag(sk, SOCK_ZAPPED);
release_sock(sk);
@@ -364,6 +391,7 @@ static int l2tp_ip6_connect(struct sock *sk, struct sockaddr *uaddr,
struct in6_addr *daddr;
int addr_type;
int rc;
+ struct l2tp_ip6_net *pn;
if (addr_len < sizeof(*lsa))
return -EINVAL;
@@ -395,10 +423,11 @@ static int l2tp_ip6_connect(struct sock *sk, struct sockaddr *uaddr,
l2tp_ip6_sk(sk)->peer_conn_id = lsa->l2tp_conn_id;
- write_lock_bh(&l2tp_ip6_lock);
+ pn = l2tp_ip6_pernet(sock_net(sk));
+ write_lock_bh(&pn->l2tp_ip6_lock);
hlist_del_init(&sk->sk_bind_node);
- sk_add_bind_node(sk, &l2tp_ip6_bind_table);
- write_unlock_bh(&l2tp_ip6_lock);
+ sk_add_bind_node(sk, &pn->l2tp_ip6_bind_table);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
out_sk:
release_sock(sk);
@@ -765,25 +794,58 @@ static struct inet6_protocol l2tp_ip6_protocol __read_mostly = {
.handler = l2tp_ip6_recv,
};
+static __net_init int l2tp_ip6_init_net(struct net *net)
+{
+ struct l2tp_ip6_net *pn = net_generic(net, l2tp_ip6_net_id);
+
+ rwlock_init(&pn->l2tp_ip6_lock);
+ INIT_HLIST_HEAD(&pn->l2tp_ip6_table);
+ INIT_HLIST_HEAD(&pn->l2tp_ip6_bind_table);
+ return 0;
+}
+
+static __net_exit void l2tp_ip6_exit_net(struct net *net)
+{
+ struct l2tp_ip6_net *pn = l2tp_ip6_pernet(net);
+
+ write_lock_bh(&pn->l2tp_ip6_lock);
+ WARN_ON_ONCE(hlist_count_nodes(&pn->l2tp_ip6_table) != 0);
+ WARN_ON_ONCE(hlist_count_nodes(&pn->l2tp_ip6_bind_table) != 0);
+ write_unlock_bh(&pn->l2tp_ip6_lock);
+}
+
+static struct pernet_operations l2tp_ip6_net_ops = {
+ .init = l2tp_ip6_init_net,
+ .exit = l2tp_ip6_exit_net,
+ .id = &l2tp_ip6_net_id,
+ .size = sizeof(struct l2tp_ip6_net),
+};
+
static int __init l2tp_ip6_init(void)
{
int err;
pr_info("L2TP IP encapsulation support for IPv6 (L2TPv3)\n");
+ err = register_pernet_device(&l2tp_ip6_net_ops);
+ if (err)
+ goto out;
+
err = proto_register(&l2tp_ip6_prot, 1);
if (err != 0)
- goto out;
+ goto out1;
err = inet6_add_protocol(&l2tp_ip6_protocol, IPPROTO_L2TP);
if (err)
- goto out1;
+ goto out2;
inet6_register_protosw(&l2tp_ip6_protosw);
return 0;
-out1:
+out2:
proto_unregister(&l2tp_ip6_prot);
+out1:
+ unregister_pernet_device(&l2tp_ip6_net_ops);
out:
return err;
}
@@ -793,6 +855,7 @@ static void __exit l2tp_ip6_exit(void)
inet6_unregister_protosw(&l2tp_ip6_protosw);
inet6_del_protocol(&l2tp_ip6_protocol, IPPROTO_L2TP);
proto_unregister(&l2tp_ip6_prot);
+ unregister_pernet_device(&l2tp_ip6_net_ops);
}
module_init(l2tp_ip6_init);
Powered by cgit, Gruvboxed by Blaster4385.