[NETNS]: Udp sockets per-net lookup.

Add the net parameter to udp_get_port family of calls and
udp_lookup one and use it to filter sockets.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 4 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index bd4b9df8f614..53739de829db 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -56,7 +56,8 @@ static inline int udp_v6_get_port(struct sock *sk, unsigned short snum)
         return udp_get_port(sk, snum, ipv6_rcv_saddr_equal);
 }
 
-static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
+static struct sock *__udp6_lib_lookup(struct net *net,
+                                      struct in6_addr *saddr, __be16 sport,
                                       struct in6_addr *daddr, __be16 dport,
                                       int dif, struct hlist_head udptable[])
 {
@@ -69,7 +70,8 @@ static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport,
         sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
                 struct inet_sock *inet = inet_sk(sk);
 
-                if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) {
+                if (sk->sk_net == net && sk->sk_hash == hnum &&
+                                sk->sk_family == PF_INET6) {
                         struct ipv6_pinfo *np = inet6_sk(sk);
                         int score = 0;
                         if (inet->dport) {
@@ -233,7 +235,7 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
         struct sock *sk;
         int err;
 
-        sk = __udp6_lib_lookup(daddr, uh->dest,
+        sk = __udp6_lib_lookup(skb->dev->nd_net, daddr, uh->dest,
                                saddr, uh->source, inet6_iif(skb), udptable);
         if (sk == NULL)
                 return;
@@ -478,7 +480,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
          * check socket cache ... must talk to Alan about his plans
          * for sock caches... i'll skip this for now.
          */
-        sk = __udp6_lib_lookup(saddr, uh->source,
+        sk = __udp6_lib_lookup(skb->dev->nd_net, saddr, uh->source,
                                daddr, uh->dest, inet6_iif(skb), udptable);
 
         if (sk == NULL) {