[NET] NETNS: Omit namespace comparision without CONFIG_NET_NS.

Introduce an inline net_eq() to compare two namespaces.
Without CONFIG_NET_NS, since no namespace other than &init_net
exists, it is always 1.

We do not need to convert 1) inline vs inline and
2) inline vs &init_net comparisons.

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

5 files changed, 19 insertions, 19 deletions

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 1064111..1b6ff51 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -139,7 +139,7 @@ static struct sock *inet_lookup_listener_slow(struct net *net,
 	sk_for_each(sk, node, head) {
 		const struct inet_sock *inet = inet_sk(sk);
 
-		if (sock_net(sk) == net && inet->num == hnum &&
+		if (net_eq(sock_net(sk), net) && inet->num == hnum &&
 				!ipv6_only_sock(sk)) {
 			const __be32 rcv_saddr = inet->rcv_saddr;
 			int score = sk->sk_family == PF_INET ? 1 : 0;
@@ -182,7 +182,7 @@ struct sock *__inet_lookup_listener(struct net *net,
 		if (inet->num == hnum && !sk->sk_node.next &&
 		    (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
 		    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
-		    !sk->sk_bound_dev_if && sock_net(sk) == net)
+		    !sk->sk_bound_dev_if && net_eq(sock_net(sk), net))
 			goto sherry_cache;
 		sk = inet_lookup_listener_slow(net, head, daddr, hnum, dif);
 	}
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 25dc8b3..d965f0a 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -117,7 +117,7 @@ static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk,
 	sk_for_each_from(sk, node) {
 		struct inet_sock *inet = inet_sk(sk);
 
-		if (sock_net(sk) == net && inet->num == num 		&&
+		if (net_eq(sock_net(sk), net) && inet->num == num	&&
 		    !(inet->daddr && inet->daddr != raddr) 		&&
 		    !(inet->rcv_saddr && inet->rcv_saddr != laddr)	&&
 		    !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index eab8d75..230716c 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1196,7 +1196,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 				    rth->fl.oif != ikeys[k] ||
 				    rth->fl.iif != 0 ||
 				    rth->rt_genid != atomic_read(&rt_genid) ||
-				    dev_net(rth->u.dst.dev) != net) {
+				    !net_eq(dev_net(rth->u.dst.dev), net)) {
 					rthp = &rth->u.dst.rt_next;
 					continue;
 				}
@@ -1455,7 +1455,7 @@ unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph,
 			    rth->rt_src  == iph->saddr &&
 			    rth->fl.iif == 0 &&
 			    !(dst_metric_locked(&rth->u.dst, RTAX_MTU)) &&
-			    dev_net(rth->u.dst.dev) == net &&
+			    net_eq(dev_net(rth->u.dst.dev), net) &&
 			    rth->rt_genid == atomic_read(&rt_genid)) {
 				unsigned short mtu = new_mtu;
 
@@ -2085,7 +2085,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 		    rth->fl.oif == 0 &&
 		    rth->fl.mark == skb->mark &&
 		    rth->fl.fl4_tos == tos &&
-		    dev_net(rth->u.dst.dev) == net &&
+		    net_eq(dev_net(rth->u.dst.dev), net) &&
 		    rth->rt_genid == atomic_read(&rt_genid)) {
 			dst_use(&rth->u.dst, jiffies);
 			RT_CACHE_STAT_INC(in_hit);
@@ -2487,7 +2487,7 @@ int __ip_route_output_key(struct net *net, struct rtable **rp,
 		    rth->fl.mark == flp->mark &&
 		    !((rth->fl.fl4_tos ^ flp->fl4_tos) &
 			    (IPTOS_RT_MASK | RTO_ONLINK)) &&
-		    dev_net(rth->u.dst.dev) == net &&
+		    net_eq(dev_net(rth->u.dst.dev), net) &&
 		    rth->rt_genid == atomic_read(&rt_genid)) {
 			dst_use(&rth->u.dst, jiffies);
 			RT_CACHE_STAT_INC(out_hit);
@@ -2796,7 +2796,7 @@ int ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb)
 		rcu_read_lock_bh();
 		for (rt = rcu_dereference(rt_hash_table[h].chain), idx = 0; rt;
 		     rt = rcu_dereference(rt->u.dst.rt_next), idx++) {
-			if (dev_net(rt->u.dst.dev) != net || idx < s_idx)
+			if (!net_eq(dev_net(rt->u.dst.dev), net) || idx < s_idx)
 				continue;
 			if (rt->rt_genid != atomic_read(&rt_genid))
 				continue;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 46847e6..2a5881c 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1974,7 +1974,7 @@ static void *listening_get_next(struct seq_file *seq, void *cur)
 		while (1) {
 			while (req) {
 				if (req->rsk_ops->family == st->family &&
-				    sock_net(req->sk) == net) {
+				    net_eq(sock_net(req->sk), net)) {
 					cur = req;
 					goto out;
 				}
@@ -1998,7 +1998,7 @@ get_req:
 	}
 get_sk:
 	sk_for_each_from(sk, node) {
-		if (sk->sk_family == st->family && sock_net(sk) == net) {
+		if (sk->sk_family == st->family && net_eq(sock_net(sk), net)) {
 			cur = sk;
 			goto out;
 		}
@@ -2049,7 +2049,7 @@ static void *established_get_first(struct seq_file *seq)
 		read_lock_bh(lock);
 		sk_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) {
 			if (sk->sk_family != st->family ||
-			    sock_net(sk) != net) {
+			    !net_eq(sock_net(sk), net)) {
 				continue;
 			}
 			rc = sk;
@@ -2059,7 +2059,7 @@ static void *established_get_first(struct seq_file *seq)
 		inet_twsk_for_each(tw, node,
 				   &tcp_hashinfo.ehash[st->bucket].twchain) {
 			if (tw->tw_family != st->family ||
-			    twsk_net(tw) != net) {
+			    !net_eq(twsk_net(tw), net)) {
 				continue;
 			}
 			rc = tw;
@@ -2086,7 +2086,7 @@ static void *established_get_next(struct seq_file *seq, void *cur)
 		tw = cur;
 		tw = tw_next(tw);
 get_tw:
-		while (tw && (tw->tw_family != st->family || twsk_net(tw) != net)) {
+		while (tw && (tw->tw_family != st->family || !net_eq(twsk_net(tw), net))) {
 			tw = tw_next(tw);
 		}
 		if (tw) {
@@ -2107,7 +2107,7 @@ get_tw:
 		sk = sk_next(sk);
 
 	sk_for_each_from(sk, node) {
-		if (sk->sk_family == st->family && sock_net(sk) == net)
+		if (sk->sk_family == st->family && net_eq(sock_net(sk), net))
 			goto found;
 	}
 
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 76d52d3..80007c7 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 (sock_net(sk) == net && sk->sk_hash == num)
+		if (net_eq(sock_net(sk), net) && sk->sk_hash == num)
 			return 1;
 	return 0;
 }
@@ -218,7 +218,7 @@ gotit:
 		sk_for_each(sk2, node, head)
 			if (sk2->sk_hash == snum                             &&
 			    sk2 != sk                                        &&
-			    sock_net(sk2) == net				     &&
+			    net_eq(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 (sock_net(sk) == net && sk->sk_hash == hnum &&
+		if (net_eq(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) {
@@ -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 (sock_net(sk) != net)
+			if (!net_eq(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 && (sock_net(sk) != net || sk->sk_family != state->family));
+	} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != state->family));
 
 	if (!sk && ++state->bucket < UDP_HTABLE_SIZE) {
 		sk = sk_head(state->hashtable + state->bucket);