[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, 5 insertions, 5 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 7e3c048ba9b1..15b91a9ee8e8 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -605,7 +605,7 @@ check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w)
 
 static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct tcmsg *tcm = NLMSG_DATA(n);
         struct nlattr *tca[TCA_MAX + 1];
         struct net_device *dev;
@@ -674,7 +674,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 
 static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct tcmsg *tcm;
         struct nlattr *tca[TCA_MAX + 1];
         struct net_device *dev;
@@ -893,7 +893,7 @@ err_out:
 
 static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         int idx, q_idx;
         int s_idx, s_q_idx;
         struct net_device *dev;
@@ -945,7 +945,7 @@ done:
 
 static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct tcmsg *tcm = NLMSG_DATA(n);
         struct nlattr *tca[TCA_MAX + 1];
         struct net_device *dev;
@@ -1139,7 +1139,7 @@ static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walk
 
 static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         int t;
         int s_t;
         struct net_device *dev;