[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.

Introduce per-sock inlines: sock_net(), sock_net_set()
and per-inet_timewait_sock inlines: twsk_net(), twsk_net_set().
Without CONFIG_NET_NS, no namespace other than &init_net exists.
Let's explicitly define them to help compiler optimizations.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 8 insertions, 8 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index e2cd93481359..76d52d37d6ac 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -137,7 +137,7 @@ static inline int __udp_lib_lport_inuse(struct net *net, __u16 num,
         struct hlist_node *node;
 
         sk_for_each(sk, node, &udptable[num & (UDP_HTABLE_SIZE - 1)])
-                if (sk->sk_net == net && sk->sk_hash == num)
+                if (sock_net(sk) == net && sk->sk_hash == num)
                         return 1;
         return 0;
 }
@@ -158,7 +158,7 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum,
         struct hlist_head *head;
         struct sock *sk2;
         int    error = 1;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         write_lock_bh(&udp_hash_lock);
 
@@ -218,7 +218,7 @@ gotit:
                 sk_for_each(sk2, node, head)
                         if (sk2->sk_hash == snum                             &&
                             sk2 != sk                                        &&
-                            sk2->sk_net == net                               &&
+                            sock_net(sk2) == net                                     &&
                             (!sk2->sk_reuse        || !sk->sk_reuse)         &&
                             (!sk2->sk_bound_dev_if || !sk->sk_bound_dev_if
                              || sk2->sk_bound_dev_if == sk->sk_bound_dev_if) &&
@@ -269,7 +269,7 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
         sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
                 struct inet_sock *inet = inet_sk(sk);
 
-                if (sk->sk_net == net && sk->sk_hash == hnum &&
+                if (sock_net(sk) == net && sk->sk_hash == hnum &&
                                 !ipv6_only_sock(sk)) {
                         int score = (sk->sk_family == PF_INET ? 1 : 0);
                         if (inet->rcv_saddr) {
@@ -607,7 +607,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 
         ipc.oif = sk->sk_bound_dev_if;
         if (msg->msg_controllen) {
-                err = ip_cmsg_send(sk->sk_net, msg, &ipc);
+                err = ip_cmsg_send(sock_net(sk), msg, &ipc);
                 if (err)
                         return err;
                 if (ipc.opt)
@@ -656,7 +656,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                                                { .sport = inet->sport,
                                                  .dport = dport } } };
                 security_sk_classify_flow(sk, &fl);
-                err = ip_route_output_flow(sk->sk_net, &rt, &fl, sk, 1);
+                err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
                 if (err) {
                         if (err == -ENETUNREACH)
                                 IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
@@ -1511,7 +1511,7 @@ static struct sock *udp_get_first(struct seq_file *seq)
         for (state->bucket = 0; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
                 struct hlist_node *node;
                 sk_for_each(sk, node, state->hashtable + state->bucket) {
-                        if (sk->sk_net != net)
+                        if (sock_net(sk) != net)
                                 continue;
                         if (sk->sk_family == state->family)
                                 goto found;
@@ -1531,7 +1531,7 @@ static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk)
                 sk = sk_next(sk);
 try_again:
                 ;
-        } while (sk && (sk->sk_net != net || sk->sk_family != state->family));
+        } while (sk && (sock_net(sk) != net || sk->sk_family != state->family));
 
         if (!sk && ++state->bucket < UDP_HTABLE_SIZE) {
                 sk = sk_head(state->hashtable + state->bucket);