[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>

3 files changed, 9 insertions, 9 deletions

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 0b8eb235bc13..74e662cbb2c5 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -951,7 +951,7 @@ done:
 
 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct nlattr *tca[TCA_ACT_MAX + 1];
         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
         int ret = 0, ovr = 0;
@@ -1029,7 +1029,7 @@ find_dump_kind(struct nlmsghdr *n)
 static int
 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct nlmsghdr *nlh;
         unsigned char *b = skb_tail_pointer(skb);
         struct nlattr *nest;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 0fbedcabf111..1086df7478bc 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -118,7 +118,7 @@ static inline u32 tcf_auto_prio(struct tcf_proto *tp)
 
 static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct nlattr *tca[TCA_MAX + 1];
         struct tcmsg *t;
         u32 protocol;
@@ -389,7 +389,7 @@ static int tcf_node_dump(struct tcf_proto *tp, unsigned long n,
 
 static int tc_dump_tfilter(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;
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;