[NETNS]: Tcp-v6 sockets per-net lookup.

Add a net argument to inet6_lookup and propagate it further.
Actually, this is tcp-v6 implementation of what was done for
tcp-v4 sockets in a previous patch.

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

2 files changed, 24 insertions, 20 deletions

diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index ece6d0ee2da5..d325a9958909 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -54,7 +54,8 @@ EXPORT_SYMBOL(__inet6_hash);
  *
  * The sockhash lock must be held as a reader here.
  */
-struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
+struct sock *__inet6_lookup_established(struct net *net,
+                                        struct inet_hashinfo *hashinfo,
                                            const struct in6_addr *saddr,
                                            const __be16 sport,
                                            const struct in6_addr *daddr,
@@ -75,12 +76,12 @@ struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo,
         read_lock(lock);
         sk_for_each(sk, node, &head->chain) {
                 /* For IPV6 do the cheaper port and family tests first. */
-                if (INET6_MATCH(sk, hash, saddr, daddr, ports, dif))
+                if (INET6_MATCH(sk, net, hash, saddr, daddr, ports, dif))
                         goto hit; /* You sunk my battleship! */
         }
         /* Must check for a TIME_WAIT'er before going to listener hash. */
         sk_for_each(sk, node, &head->twchain) {
-                if (INET6_TW_MATCH(sk, hash, saddr, daddr, ports, dif))
+                if (INET6_TW_MATCH(sk, net, hash, saddr, daddr, ports, dif))
                         goto hit;
         }
         read_unlock(lock);
@@ -93,9 +94,9 @@ hit:
 }
 EXPORT_SYMBOL(__inet6_lookup_established);
 
-struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
-                                   const struct in6_addr *daddr,
-                                   const unsigned short hnum, const int dif)
+struct sock *inet6_lookup_listener(struct net *net,
+                struct inet_hashinfo *hashinfo, const struct in6_addr *daddr,
+                const unsigned short hnum, const int dif)
 {
         struct sock *sk;
         const struct hlist_node *node;
@@ -104,7 +105,8 @@ struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
 
         read_lock(&hashinfo->lhash_lock);
         sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
-                if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
+                if (sk->sk_net == net && inet_sk(sk)->num == hnum &&
+                                sk->sk_family == PF_INET6) {
                         const struct ipv6_pinfo *np = inet6_sk(sk);
 
                         score = 1;
@@ -136,7 +138,7 @@ struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
 
 EXPORT_SYMBOL_GPL(inet6_lookup_listener);
 
-struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
+struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
                           const struct in6_addr *saddr, const __be16 sport,
                           const struct in6_addr *daddr, const __be16 dport,
                           const int dif)
@@ -144,7 +146,7 @@ struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
         struct sock *sk;
 
         local_bh_disable();
-        sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
+        sk = __inet6_lookup(net, hashinfo, saddr, sport, daddr, ntohs(dport), dif);
         local_bh_enable();
 
         return sk;
@@ -170,6 +172,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
         struct sock *sk2;
         const struct hlist_node *node;
         struct inet_timewait_sock *tw;
+        struct net *net = sk->sk_net;
 
         prefetch(head->chain.first);
         write_lock(lock);
@@ -178,7 +181,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
         sk_for_each(sk2, node, &head->twchain) {
                 tw = inet_twsk(sk2);
 
-                if (INET6_TW_MATCH(sk2, hash, saddr, daddr, ports, dif)) {
+                if (INET6_TW_MATCH(sk2, net, hash, saddr, daddr, ports, dif)) {
                         if (twsk_unique(sk, sk2, twp))
                                 goto unique;
                         else
@@ -189,7 +192,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
 
         /* And established part... */
         sk_for_each(sk2, node, &head->chain) {
-                if (INET6_MATCH(sk2, hash, saddr, daddr, ports, dif))
+                if (INET6_MATCH(sk2, net, hash, saddr, daddr, ports, dif))
                         goto not_unique;
         }
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 00c08399837d..59d0029e93a7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -330,8 +330,8 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
         struct tcp_sock *tp;
         __u32 seq;
 
-        sk = inet6_lookup(&tcp_hashinfo, &hdr->daddr, th->dest, &hdr->saddr,
-                          th->source, skb->dev->ifindex);
+        sk = inet6_lookup(skb->dev->nd_net, &tcp_hashinfo, &hdr->daddr,
+                        th->dest, &hdr->saddr, th->source, skb->dev->ifindex);
 
         if (sk == NULL) {
                 ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
@@ -1208,9 +1208,9 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
         if (req)
                 return tcp_check_req(sk, skb, req, prev);
 
-        nsk = __inet6_lookup_established(&tcp_hashinfo, &ipv6_hdr(skb)->saddr,
-                                         th->source, &ipv6_hdr(skb)->daddr,
-                                         ntohs(th->dest), inet6_iif(skb));
+        nsk = __inet6_lookup_established(sk->sk_net, &tcp_hashinfo,
+                        &ipv6_hdr(skb)->saddr, th->source,
+                        &ipv6_hdr(skb)->daddr, ntohs(th->dest), inet6_iif(skb));
 
         if (nsk) {
                 if (nsk->sk_state != TCP_TIME_WAIT) {
@@ -1710,9 +1710,10 @@ static int tcp_v6_rcv(struct sk_buff *skb)
         TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb));
         TCP_SKB_CB(skb)->sacked = 0;
 
-        sk = __inet6_lookup(&tcp_hashinfo, &ipv6_hdr(skb)->saddr, th->source,
-                            &ipv6_hdr(skb)->daddr, ntohs(th->dest),
-                            inet6_iif(skb));
+        sk = __inet6_lookup(skb->dev->nd_net, &tcp_hashinfo,
+                        &ipv6_hdr(skb)->saddr, th->source,
+                        &ipv6_hdr(skb)->daddr, ntohs(th->dest),
+                        inet6_iif(skb));
 
         if (!sk)
                 goto no_tcp_socket;
@@ -1792,7 +1793,7 @@ do_time_wait:
         {
                 struct sock *sk2;
 
-                sk2 = inet6_lookup_listener(&tcp_hashinfo,
+                sk2 = inet6_lookup_listener(skb->dev->nd_net, &tcp_hashinfo,
                                             &ipv6_hdr(skb)->daddr,
                                             ntohs(th->dest), inet6_iif(skb));
                 if (sk2 != NULL) {