net: unify for_each_ip_tunnel_rcu()

The defitions of for_each_ip_tunnel_rcu() are same,
so unify it. Also, don't hide the parameter 't'.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 25 insertions, 49 deletions

diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index 06d1d5badd36..f4e56ecd0b1a 100644
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -6,6 +6,13 @@
 #include <uapi/linux/if_tunnel.h>
 #include <linux/u64_stats_sync.h>
 
+/*
+ * Locking : hash tables are protected by RCU and RTNL
+ */
+
+#define for_each_ip_tunnel_rcu(pos, start) \
+        for (pos = rcu_dereference(start); pos; pos = rcu_dereference(pos->next))
+
 /* often modified stats are per cpu, other are shared (netdev->stats) */
 struct pcpu_tstats {
         u64     rx_packets;
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 37000ae24c55..127f2a1e67f5 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -164,12 +164,6 @@ struct ipgre_net {
 #define tunnels_r       tunnels[2]
 #define tunnels_l       tunnels[1]
 #define tunnels_wc      tunnels[0]
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-#define for_each_ip_tunnel_rcu(start) \
-        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
 static struct rtnl_link_stats64 *ipgre_get_stats64(struct net_device *dev,
                                                    struct rtnl_link_stats64 *tot)
@@ -241,7 +235,7 @@ static struct ip_tunnel *ipgre_tunnel_lookup(struct net_device *dev,
                        ARPHRD_ETHER : ARPHRD_IPGRE;
         int score, cand_score = 4;
 
-        for_each_ip_tunnel_rcu(ign->tunnels_r_l[h0 ^ h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_r_l[h0 ^ h1]) {
                 if (local != t->parms.iph.saddr ||
                     remote != t->parms.iph.daddr ||
                     !(t->dev->flags & IFF_UP))
@@ -268,7 +262,7 @@ static struct ip_tunnel *ipgre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_r[h0 ^ h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_r[h0 ^ h1]) {
                 if (remote != t->parms.iph.daddr ||
                     !(t->dev->flags & IFF_UP))
                         continue;
@@ -294,7 +288,7 @@ static struct ip_tunnel *ipgre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_l[h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_l[h1]) {
                 if ((local != t->parms.iph.saddr &&
                      (local != t->parms.iph.daddr ||
                       !ipv4_is_multicast(local))) ||
@@ -322,7 +316,7 @@ static struct ip_tunnel *ipgre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_wc[h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_wc[h1]) {
                 if (t->parms.i_key != key ||
                     !(t->dev->flags & IFF_UP))
                         continue;
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index e0f2c88f03c1..516188b0dc1e 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -66,11 +66,6 @@ static void vti_tunnel_setup(struct net_device *dev);
 static void vti_dev_free(struct net_device *dev);
 static int vti_tunnel_bind_dev(struct net_device *dev);
 
-/* Locking : hash tables are protected by RCU and RTNL */
-
-#define for_each_ip_tunnel_rcu(start) \
-        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
-
 #define VTI_XMIT(stats1, stats2) do {                           \
         int err;                                                \
         int pkt_len = skb->len;                                 \
@@ -133,19 +128,19 @@ static struct ip_tunnel *vti_tunnel_lookup(struct net *net,
         struct ip_tunnel *t;
         struct vti_net *ipn = net_generic(net, vti_net_id);
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_r_l[h0 ^ h1])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_r_l[h0 ^ h1])
                 if (local == t->parms.iph.saddr &&
                     remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
                         return t;
-        for_each_ip_tunnel_rcu(ipn->tunnels_r[h0])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_r[h0])
                 if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
                         return t;
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_l[h1])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_l[h1])
                 if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP))
                         return t;
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_wc[0])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_wc[0])
                 if (t && (t->dev->flags&IFF_UP))
                         return t;
         return NULL;
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 3a4ad7d82f67..099fc1c428b4 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -140,13 +140,6 @@ static void ipip_tunnel_setup(struct net_device *dev);
 static void ipip_dev_free(struct net_device *dev);
 static struct rtnl_link_ops ipip_link_ops __read_mostly;
 
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-#define for_each_ip_tunnel_rcu(start) \
-        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
-
 static struct rtnl_link_stats64 *ipip_get_stats64(struct net_device *dev,
                                                   struct rtnl_link_stats64 *tot)
 {
@@ -189,16 +182,16 @@ static struct ip_tunnel *ipip_tunnel_lookup(struct net *net,
         struct ip_tunnel *t;
         struct ipip_net *ipn = net_generic(net, ipip_net_id);
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_r_l[h0 ^ h1])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_r_l[h0 ^ h1])
                 if (local == t->parms.iph.saddr &&
                     remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
                         return t;
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_r[h0])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_r[h0])
                 if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
                         return t;
 
-        for_each_ip_tunnel_rcu(ipn->tunnels_l[h1])
+        for_each_ip_tunnel_rcu(t, ipn->tunnels_l[h1])
                 if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP))
                         return t;
 
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 672101db71ee..823fd64d0136 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -109,12 +109,6 @@ static u32 HASH_ADDR(const struct in6_addr *addr)
 #define tunnels_r       tunnels[2]
 #define tunnels_l       tunnels[1]
 #define tunnels_wc      tunnels[0]
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-#define for_each_ip_tunnel_rcu(start) \
-        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
 static struct rtnl_link_stats64 *ip6gre_get_stats64(struct net_device *dev,
                 struct rtnl_link_stats64 *tot)
@@ -172,7 +166,7 @@ static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev,
                        ARPHRD_ETHER : ARPHRD_IP6GRE;
         int score, cand_score = 4;
 
-        for_each_ip_tunnel_rcu(ign->tunnels_r_l[h0 ^ h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_r_l[h0 ^ h1]) {
                 if (!ipv6_addr_equal(local, &t->parms.laddr) ||
                     !ipv6_addr_equal(remote, &t->parms.raddr) ||
                     key != t->parms.i_key ||
@@ -197,7 +191,7 @@ static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_r[h0 ^ h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_r[h0 ^ h1]) {
                 if (!ipv6_addr_equal(remote, &t->parms.raddr) ||
                     key != t->parms.i_key ||
                     !(t->dev->flags & IFF_UP))
@@ -221,7 +215,7 @@ static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_l[h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_l[h1]) {
                 if ((!ipv6_addr_equal(local, &t->parms.laddr) &&
                           (!ipv6_addr_equal(local, &t->parms.raddr) ||
                                  !ipv6_addr_is_multicast(local))) ||
@@ -247,7 +241,7 @@ static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev,
                 }
         }
 
-        for_each_ip_tunnel_rcu(ign->tunnels_wc[h1]) {
+        for_each_ip_tunnel_rcu(t, ign->tunnels_wc[h1]) {
                 if (t->parms.i_key != key ||
                     !(t->dev->flags & IFF_UP))
                         continue;
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index ffe83ef70cf7..5bce2f698044 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -81,13 +81,6 @@ struct sit_net {
         struct net_device *fb_tunnel_dev;
 };
 
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-#define for_each_ip_tunnel_rcu(start) \
-        for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
-
 static struct rtnl_link_stats64 *ipip6_get_stats64(struct net_device *dev,
                                                    struct rtnl_link_stats64 *tot)
 {
@@ -133,20 +126,20 @@ static struct ip_tunnel *ipip6_tunnel_lookup(struct net *net,
         struct ip_tunnel *t;
         struct sit_net *sitn = net_generic(net, sit_net_id);
 
-        for_each_ip_tunnel_rcu(sitn->tunnels_r_l[h0 ^ h1]) {
+        for_each_ip_tunnel_rcu(t, sitn->tunnels_r_l[h0 ^ h1]) {
                 if (local == t->parms.iph.saddr &&
                     remote == t->parms.iph.daddr &&
                     (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
                     (t->dev->flags & IFF_UP))
                         return t;
         }
-        for_each_ip_tunnel_rcu(sitn->tunnels_r[h0]) {
+        for_each_ip_tunnel_rcu(t, sitn->tunnels_r[h0]) {
                 if (remote == t->parms.iph.daddr &&
                     (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
                     (t->dev->flags & IFF_UP))
                         return t;
         }
-        for_each_ip_tunnel_rcu(sitn->tunnels_l[h1]) {
+        for_each_ip_tunnel_rcu(t, sitn->tunnels_l[h1]) {
                 if (local == t->parms.iph.saddr &&
                     (!dev || !t->parms.link || dev->iflink == t->parms.link) &&
                     (t->dev->flags & IFF_UP))