sctp: Enable sctp in all network namespaces

- Fix the sctp_af operations to work in all namespaces
- Enable sctp socket creation in all network namespaces.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 11 insertions, 9 deletions

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index bbf15341eb2b..a18cda60e156 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -582,7 +582,7 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
         if (!(type & IPV6_ADDR_UNICAST))
                 return 0;
 
-        return ipv6_chk_addr(&init_net, in6, NULL, 0);
+        return ipv6_chk_addr(sock_net(&sp->inet.sk), in6, NULL, 0);
 }
 
 /* This function checks if the address is a valid address to be used for
@@ -859,14 +859,14 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
                 struct net_device *dev;
 
                 if (type & IPV6_ADDR_LINKLOCAL) {
+                        struct net *net;
                         if (!addr->v6.sin6_scope_id)
                                 return 0;
+                        net = sock_net(&opt->inet.sk);
                         rcu_read_lock();
-                        dev = dev_get_by_index_rcu(&init_net,
-                                                   addr->v6.sin6_scope_id);
+                        dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id);
                         if (!dev ||
-                            !ipv6_chk_addr(&init_net, &addr->v6.sin6_addr,
-                                           dev, 0)) {
+                            !ipv6_chk_addr(net, &addr->v6.sin6_addr, dev, 0)) {
                                 rcu_read_unlock();
                                 return 0;
                         }
@@ -899,7 +899,7 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
                         if (!addr->v6.sin6_scope_id)
                                 return 0;
                         rcu_read_lock();
-                        dev = dev_get_by_index_rcu(&init_net,
+                        dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk),
                                                    addr->v6.sin6_scope_id);
                         rcu_read_unlock();
                         if (!dev)
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index de7994edb4ca..059c914c09f2 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -367,7 +367,8 @@ static int sctp_v4_addr_valid(union sctp_addr *addr,
 /* Should this be available for binding?   */
 static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
 {
-        int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr);
+        struct net *net = sock_net(&sp->inet.sk);
+        int ret = inet_addr_type(net, addr->v4.sin_addr.s_addr);
 
 
         if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
@@ -454,7 +455,7 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
         SCTP_DEBUG_PRINTK("%s: DST:%pI4, SRC:%pI4 - ",
                           __func__, &fl4->daddr, &fl4->saddr);
 
-        rt = ip_route_output_key(&init_net, fl4);
+        rt = ip_route_output_key(sock_net(sk), fl4);
         if (!IS_ERR(rt))
                 dst = &rt->dst;
 
@@ -500,7 +501,7 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
                     (AF_INET == laddr->a.sa.sa_family)) {
                         fl4->saddr = laddr->a.v4.sin_addr.s_addr;
                         fl4->fl4_sport = laddr->a.v4.sin_port;
-                        rt = ip_route_output_key(&init_net, fl4);
+                        rt = ip_route_output_key(sock_net(sk), fl4);
                         if (!IS_ERR(rt)) {
                                 dst = &rt->dst;
                                 goto out_unlock;
@@ -1033,6 +1034,7 @@ static const struct net_protocol sctp_protocol = {
         .handler     = sctp_rcv,
         .err_handler = sctp_v4_err,
         .no_policy   = 1,
+        .netns_ok    = 1,
 };
 
 /* IPv4 address related functions.  */