Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

[linux-2.6-omap-h63xx.git] / net / ipv4 / af_inet.c

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 44f5ce1fbfa4849c6c00941b978d799b56a121df..24eca23c2db3159c91898bd7fefe8bbb501f1233 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -243,6 +243,23 @@ void build_ehash_secret(void)
 }
 EXPORT_SYMBOL(build_ehash_secret);
 
+static inline int inet_netns_ok(struct net *net, int protocol)
+{
+       int hash;
+       struct net_protocol *ipprot;
+
+       if (net == &init_net)
+               return 1;
+
+       hash = protocol & (MAX_INET_PROTOS - 1);
+       ipprot = rcu_dereference(inet_protos[hash]);
+
+       if (ipprot == NULL)
+               /* raw IP is OK */
+               return 1;
+       return ipprot->netns_ok;
+}
+
 /*
  *     Create an inet socket.
  */
@@ -259,9 +276,6 @@ static int inet_create(struct net *net, struct socket *sock, int protocol)
        int try_loading_module = 0;
        int err;
 
-       if (net != &init_net)
-               return -EAFNOSUPPORT;
-
        if (sock->type != SOCK_RAW &&
            sock->type != SOCK_DGRAM &&
            !inet_ehash_secret)
@@ -320,6 +334,10 @@ lookup_protocol:
        if (answer->capability > 0 && !capable(answer->capability))
                goto out_rcu_unlock;
 
+       err = -EAFNOSUPPORT;
+       if (!inet_netns_ok(net, protocol))
+               goto out_rcu_unlock;
+
        sock->ops = answer->ops;
        answer_prot = answer->prot;
        answer_no_check = answer->no_check;
@@ -446,7 +464,7 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
        if (addr_len < sizeof(struct sockaddr_in))
                goto out;
 
-       chk_addr_ret = inet_addr_type(&init_net, addr->sin_addr.s_addr);
+       chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
 
        /* Not specified by any standard per-se, however it breaks too
         * many applications when removed.  It is unfortunate since
@@ -784,7 +802,7 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
        struct sock *sk = sock->sk;
        int err = 0;
-       struct net *net = sk->sk_net;
+       struct net *net = sock_net(sk);
 
        switch (cmd) {
                case SIOCGSTAMP:
@@ -1059,7 +1077,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
 
        if (sysctl_ip_dynaddr > 1) {
                printk(KERN_INFO "%s(): shifting inet->"
-                                "saddr from %d.%d.%d.%d to %d.%d.%d.%d\n",
+                                "saddr from " NIPQUAD_FMT " to " NIPQUAD_FMT "\n",
                       __func__,
                       NIPQUAD(old_saddr),
                       NIPQUAD(new_saddr));
@@ -1114,7 +1132,7 @@ int inet_sk_rebuild_header(struct sock *sk)
        };
 
        security_sk_classify_flow(sk, &fl);
-       err = ip_route_output_flow(&init_net, &rt, &fl, sk, 0);
+       err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 0);
 }
        if (!err)
                sk_setup_caps(sk, &rt->u.dst);
@@ -1216,7 +1234,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
                segs = ops->gso_segment(skb, features);
        rcu_read_unlock();
 
-       if (!segs || unlikely(IS_ERR(segs)))
+       if (!segs || IS_ERR(segs))
                goto out;
 
        skb = segs;
@@ -1232,6 +1250,29 @@ out:
        return segs;
 }
 
+int inet_ctl_sock_create(struct sock **sk, unsigned short family,
+                        unsigned short type, unsigned char protocol,
+                        struct net *net)
+{
+       struct socket *sock;
+       int rc = sock_create_kern(family, type, protocol, &sock);
+
+       if (rc == 0) {
+               *sk = sock->sk;
+               (*sk)->sk_allocation = GFP_ATOMIC;
+               /*
+                * Unhash it so that IP input processing does not even see it,
+                * we do not wish this socket to see incoming packets.
+                */
+               (*sk)->sk_prot->unhash(*sk);
+
+               sk_change_net(*sk, net);
+       }
+       return rc;
+}
+
+EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
+
 unsigned long snmp_fold_field(void *mib[], int offt)
 {
        unsigned long res = 0;
@@ -1284,17 +1325,20 @@ static struct net_protocol tcp_protocol = {
        .gso_send_check = tcp_v4_gso_send_check,
        .gso_segment =  tcp_tso_segment,
        .no_policy =    1,
+       .netns_ok =     1,
 };
 
 static struct net_protocol udp_protocol = {
        .handler =      udp_rcv,
        .err_handler =  udp_err,
        .no_policy =    1,
+       .netns_ok =     1,
 };
 
 static struct net_protocol icmp_protocol = {
        .handler =      icmp_rcv,
        .no_policy =    1,
+       .netns_ok =     1,
 };
 
 static int __init init_ipv4_mibs(void)