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l2tp: Make ipv4 protocol handler namespace aware. 

The infrastructure is already pretty much entirely there
to allow this conversion.

The tunnel and session lookups have per-namespace tables,
and the ipv4 bind lookup includes the namespace in the
lookup key.

Set netns_ok in l2tp_ip_protocol.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-02-05 14:36:02 -05:00
parent 167eb17e0b
commit 9d6ddb1990
1 changed files with 10 additions and 6 deletions
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16
net/l2tp/l2tp_ip.c
View File

@ -115,6 +115,7 @@ static inline struct sock *l2tp_ip_bind_lookup(struct net *net, __be32 laddr, in
*/
static int l2tp_ip_recv(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
struct sock *sk;
u32 session_id;
u32 tunnel_id;
@ -142,7 +143,7 @@ static int l2tp_ip_recv(struct sk_buff *skb)
}
/* Ok, this is a data packet. Lookup the session. */
session = l2tp_session_find(&init_net, NULL, session_id);
session = l2tp_session_find(net, NULL, session_id);
if (session == NULL)
goto discard;
@ -173,14 +174,14 @@ pass_up:
goto discard;
tunnel_id = ntohl(*(__be32 *) &skb->data[4]);
tunnel = l2tp_tunnel_find(&init_net, tunnel_id);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel != NULL)
sk = tunnel->sock;
else {
struct iphdr *iph = (struct iphdr *) skb_network_header(skb);
read_lock_bh(&l2tp_ip_lock);
sk = __l2tp_ip_bind_lookup(&init_net, iph->daddr, 0, tunnel_id);
sk = __l2tp_ip_bind_lookup(net, iph->daddr, 0, tunnel_id);
read_unlock_bh(&l2tp_ip_lock);
}
@ -239,6 +240,7 @@ static int l2tp_ip_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct sockaddr_l2tpip *addr = (struct sockaddr_l2tpip *) uaddr;
struct net *net = sock_net(sk);
int ret;
int chk_addr_ret;
@ -251,7 +253,8 @@ static int l2tp_ip_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
ret = -EADDRINUSE;
read_lock_bh(&l2tp_ip_lock);
if (__l2tp_ip_bind_lookup(&init_net, addr->l2tp_addr.s_addr, sk->sk_bound_dev_if, addr->l2tp_conn_id))
if (__l2tp_ip_bind_lookup(net, addr->l2tp_addr.s_addr,
sk->sk_bound_dev_if, addr->l2tp_conn_id))
goto out_in_use;
read_unlock_bh(&l2tp_ip_lock);
@ -260,7 +263,7 @@ static int l2tp_ip_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_l2tpip))
goto out;
chk_addr_ret = inet_addr_type(&init_net, addr->l2tp_addr.s_addr);
chk_addr_ret = inet_addr_type(net, addr->l2tp_addr.s_addr);
ret = -EADDRNOTAVAIL;
if (addr->l2tp_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
@ -369,7 +372,7 @@ static int l2tp_ip_backlog_recv(struct sock *sk, struct sk_buff *skb)
return 0;
drop:
IP_INC_STATS(&init_net, IPSTATS_MIB_INDISCARDS);
IP_INC_STATS(sock_net(sk), IPSTATS_MIB_INDISCARDS);
kfree_skb(skb);
return -1;
}
@ -605,6 +608,7 @@ static struct inet_protosw l2tp_ip_protosw = {
static struct net_protocol l2tp_ip_protocol __read_mostly = {
.handler = l2tp_ip_recv,
.netns_ok = 1,
};
static int __init l2tp_ip_init(void)