[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>

15 files changed, 39 insertions, 39 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d1de9ec74261..f2c90f145cbb 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3054,7 +3054,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
 static int
 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *pfx;
@@ -3112,7 +3112,7 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
 static int
 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *pfx;
@@ -3322,7 +3322,7 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
         struct inet6_ifaddr *ifa;
         struct ifmcaddr6 *ifmca;
         struct ifacaddr6 *ifaca;
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
 
         s_idx = cb->args[0];
         s_ip_idx = ip_idx = cb->args[1];
@@ -3418,7 +3418,7 @@ static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
                              void *arg)
 {
-        struct net *net = in_skb->sk->sk_net;
+        struct net *net = sock_net(in_skb->sk);
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *addr = NULL;
@@ -3645,7 +3645,7 @@ nla_put_failure:
 
 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         int idx, err;
         int s_idx = cb->args[0];
         struct net_device *dev;
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index de371b5997fe..9bfa8846f262 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -364,7 +364,7 @@ static const struct nla_policy ifal_policy[IFAL_MAX+1] = {
 static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
                              void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *pfx;
@@ -452,7 +452,7 @@ static int ip6addrlbl_fill(struct sk_buff *skb,
 
 static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct ip6addrlbl_entry *p;
         struct hlist_node *pos;
         int idx = 0, s_idx = cb->args[0];
@@ -490,7 +490,7 @@ static inline int ip6addrlbl_msgsize(void)
 static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
                           void *arg)
 {
-        struct net *net = in_skb->sk->sk_net;
+        struct net *net = sock_net(in_skb->sk);
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *addr;
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index f52bdaed8a1b..12f04e9d3e88 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -245,7 +245,7 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
         struct sock *sk = sock->sk;
         struct inet_sock *inet = inet_sk(sk);
         struct ipv6_pinfo *np = inet6_sk(sk);
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         __be32 v4addr = 0;
         unsigned short snum;
         int addr_type = 0;
@@ -438,7 +438,7 @@ EXPORT_SYMBOL(inet6_getname);
 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
         struct sock *sk = sock->sk;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         switch(cmd)
         {
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index e7a7fe26cebf..cac580749ebe 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -154,7 +154,7 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
                                struct nlattr **tb)
 {
         int err = -EINVAL;
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct fib6_rule *rule6 = (struct fib6_rule *) rule;
 
         if (rule->action == FR_ACT_TO_TBL) {
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 50857662e6b7..63309d10df3a 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -163,7 +163,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
                                      struct flowi *fl)
 {
         struct dst_entry *dst;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         int res = 0;
 
         /* Informational messages are not limited. */
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index c0c8d2d17682..21c467675412 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -105,7 +105,7 @@ struct sock *inet6_lookup_listener(struct net *net,
 
         read_lock(&hashinfo->lhash_lock);
         sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
-                if (sk->sk_net == net && inet_sk(sk)->num == hnum &&
+                if (sock_net(sk) == net && inet_sk(sk)->num == hnum &&
                                 sk->sk_family == PF_INET6) {
                         const struct ipv6_pinfo *np = inet6_sk(sk);
 
@@ -172,7 +172,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
         struct sock *sk2;
         const struct hlist_node *node;
         struct inet_timewait_sock *tw;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         prefetch(head->chain.first);
         write_lock(lock);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index b0814b0082e7..b3f6e03c454c 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -346,7 +346,7 @@ end:
 
 static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         unsigned int h, s_h;
         unsigned int e = 0, s_e;
         struct rt6_rtnl_dump_arg arg;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 556300f0eba5..a8b4da25b0a7 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -910,7 +910,7 @@ static int ip6_dst_lookup_tail(struct sock *sk,
                                struct dst_entry **dst, struct flowi *fl)
 {
         int err;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         if (*dst == NULL)
                 *dst = ip6_route_output(net, sk, fl);
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index dc6695cc5767..d3d93d752e10 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -107,7 +107,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
                     char __user *optval, int optlen)
 {
         struct ipv6_pinfo *np = inet6_sk(sk);
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         int val, valbool;
         int retv = -ENOPROTOOPT;
 
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 0357de8e78c8..20a3d8e2f6c6 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -181,7 +181,7 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
         struct net_device *dev = NULL;
         struct ipv6_mc_socklist *mc_lst;
         struct ipv6_pinfo *np = inet6_sk(sk);
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         int err;
 
         if (!ipv6_addr_is_multicast(addr))
@@ -255,7 +255,7 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
 {
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct ipv6_mc_socklist *mc_lst, **lnk;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         write_lock_bh(&ipv6_sk_mc_lock);
         for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
@@ -327,7 +327,7 @@ void ipv6_sock_mc_close(struct sock *sk)
 {
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct ipv6_mc_socklist *mc_lst;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         write_lock_bh(&ipv6_sk_mc_lock);
         while ((mc_lst = np->ipv6_mc_list) != NULL) {
@@ -365,7 +365,7 @@ int ip6_mc_source(int add, int omode, struct sock *sk,
         struct inet6_dev *idev;
         struct ipv6_pinfo *inet6 = inet6_sk(sk);
         struct ip6_sf_socklist *psl;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         int i, j, rv;
         int leavegroup = 0;
         int pmclocked = 0;
@@ -505,7 +505,7 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
         struct inet6_dev *idev;
         struct ipv6_pinfo *inet6 = inet6_sk(sk);
         struct ip6_sf_socklist *newpsl, *psl;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
         int leavegroup = 0;
         int i, err;
 
@@ -598,7 +598,7 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
         struct net_device *dev;
         struct ipv6_pinfo *inet6 = inet6_sk(sk);
         struct ip6_sf_socklist *psl;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
 
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index af1ec7ba757c..70ef0d276cc0 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1879,11 +1879,11 @@ compat_do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user,
 
         switch (cmd) {
         case IP6T_SO_SET_REPLACE:
-                ret = compat_do_replace(sk->sk_net, user, len);
+                ret = compat_do_replace(sock_net(sk), user, len);
                 break;
 
         case IP6T_SO_SET_ADD_COUNTERS:
-                ret = do_add_counters(sk->sk_net, user, len, 1);
+                ret = do_add_counters(sock_net(sk), user, len, 1);
                 break;
 
         default:
@@ -1990,10 +1990,10 @@ compat_do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
 
         switch (cmd) {
         case IP6T_SO_GET_INFO:
-                ret = get_info(sk->sk_net, user, len, 1);
+                ret = get_info(sock_net(sk), user, len, 1);
                 break;
         case IP6T_SO_GET_ENTRIES:
-                ret = compat_get_entries(sk->sk_net, user, len);
+                ret = compat_get_entries(sock_net(sk), user, len);
                 break;
         default:
                 ret = do_ip6t_get_ctl(sk, cmd, user, len);
@@ -2012,11 +2012,11 @@ do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
 
         switch (cmd) {
         case IP6T_SO_SET_REPLACE:
-                ret = do_replace(sk->sk_net, user, len);
+                ret = do_replace(sock_net(sk), user, len);
                 break;
 
         case IP6T_SO_SET_ADD_COUNTERS:
-                ret = do_add_counters(sk->sk_net, user, len, 0);
+                ret = do_add_counters(sock_net(sk), user, len, 0);
                 break;
 
         default:
@@ -2037,11 +2037,11 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
 
         switch (cmd) {
         case IP6T_SO_GET_INFO:
-                ret = get_info(sk->sk_net, user, len, 0);
+                ret = get_info(sock_net(sk), user, len, 0);
                 break;
 
         case IP6T_SO_GET_ENTRIES:
-                ret = get_entries(sk->sk_net, user, len);
+                ret = get_entries(sock_net(sk), user, len);
                 break;
 
         case IP6T_SO_GET_REVISION_MATCH:
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index efb0047f6880..12c7a1560977 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -76,7 +76,7 @@ static struct sock *__raw_v6_lookup(struct net *net, struct sock *sk,
                 if (inet_sk(sk)->num == num) {
                         struct ipv6_pinfo *np = inet6_sk(sk);
 
-                        if (sk->sk_net != net)
+                        if (sock_net(sk) != net)
                                 continue;
 
                         if (!ipv6_addr_any(&np->daddr) &&
@@ -280,7 +280,7 @@ static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
                         if (!sk->sk_bound_dev_if)
                                 goto out;
 
-                        dev = dev_get_by_index(sk->sk_net, sk->sk_bound_dev_if);
+                        dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
                         if (!dev) {
                                 err = -ENODEV;
                                 goto out;
@@ -293,7 +293,7 @@ static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
                 v4addr = LOOPBACK4_IPV6;
                 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
                         err = -EADDRNOTAVAIL;
-                        if (!ipv6_chk_addr(sk->sk_net, &addr->sin6_addr,
+                        if (!ipv6_chk_addr(sock_net(sk), &addr->sin6_addr,
                                            dev, 0)) {
                                 if (dev)
                                         dev_put(dev);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 65053fba8c1a..ac4428371432 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2020,7 +2020,7 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 
         cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
         cfg->fc_nlinfo.nlh = nlh;
-        cfg->fc_nlinfo.nl_net = skb->sk->sk_net;
+        cfg->fc_nlinfo.nl_net = sock_net(skb->sk);
 
         if (tb[RTA_GATEWAY]) {
                 nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16);
@@ -2216,7 +2216,7 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg)
 
 static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 {
-        struct net *net = in_skb->sk->sk_net;
+        struct net *net = sock_net(in_skb->sk);
         struct nlattr *tb[RTA_MAX+1];
         struct rt6_info *rt;
         struct sk_buff *skb;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 086deffff9c9..323c7e06ef43 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1218,7 +1218,7 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
         if (req)
                 return tcp_check_req(sk, skb, req, prev);
 
-        nsk = __inet6_lookup_established(sk->sk_net, &tcp_hashinfo,
+        nsk = __inet6_lookup_established(sock_net(sk), &tcp_hashinfo,
                         &ipv6_hdr(skb)->saddr, th->source,
                         &ipv6_hdr(skb)->daddr, ntohs(th->dest), inet6_iif(skb));
 
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 6683c04b427e..db266ff297e5 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -70,7 +70,7 @@ static struct sock *__udp6_lib_lookup(struct net *net,
         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 &&
                                 sk->sk_family == PF_INET6) {
                         struct ipv6_pinfo *np = inet6_sk(sk);
                         int score = 0;
@@ -323,7 +323,7 @@ static struct sock *udp_v6_mcast_next(struct sock *sk,
         sk_for_each_from(s, node) {
                 struct inet_sock *inet = inet_sk(s);
 
-                if (s->sk_net != sk->sk_net)
+                if (sock_net(s) != sock_net(sk))
                         continue;
 
                 if (s->sk_hash == num && s->sk_family == PF_INET6) {