Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[~andy/linux] / net / ipv4 / ip_tunnel.c

diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index bd28f386bd02020ef3adc4295a90021d6d43a0f7..a82a22d8f77fdca5f496e9d7cb45f40b70d194ca 100644 (file)
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -93,83 +93,32 @@ static void tunnel_dst_reset(struct ip_tunnel *t)
        tunnel_dst_set(t, NULL);
 }
 
-static void tunnel_dst_reset_all(struct ip_tunnel *t)
+void ip_tunnel_dst_reset_all(struct ip_tunnel *t)
 {
        int i;
 
        for_each_possible_cpu(i)
                __tunnel_dst_set(per_cpu_ptr(t->dst_cache, i), NULL);
 }
+EXPORT_SYMBOL(ip_tunnel_dst_reset_all);
 
-static struct dst_entry *tunnel_dst_get(struct ip_tunnel *t)
+static struct rtable *tunnel_rtable_get(struct ip_tunnel *t, u32 cookie)
 {
        struct dst_entry *dst;
 
        rcu_read_lock();
        dst = rcu_dereference(this_cpu_ptr(t->dst_cache)->dst);
-       if (dst)
+       if (dst) {
+               if (dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+                       rcu_read_unlock();
+                       tunnel_dst_reset(t);
+                       return NULL;
+               }
                dst_hold(dst);
-       rcu_read_unlock();
-       return dst;
-}
-
-static struct dst_entry *tunnel_dst_check(struct ip_tunnel *t, u32 cookie)
-{
-       struct dst_entry *dst = tunnel_dst_get(t);
-
-       if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
-               tunnel_dst_reset(t);
-               return NULL;
        }
-
-       return dst;
-}
-
-/* Often modified stats are per cpu, other are shared (netdev->stats) */
-struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev,
-                                               struct rtnl_link_stats64 *tot)
-{
-       int i;
-
-       for_each_possible_cpu(i) {
-               const struct pcpu_sw_netstats *tstats =
-                                                  per_cpu_ptr(dev->tstats, i);
-               u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
-               unsigned int start;
-
-               do {
-                       start = u64_stats_fetch_begin_bh(&tstats->syncp);
-                       rx_packets = tstats->rx_packets;
-                       tx_packets = tstats->tx_packets;
-                       rx_bytes = tstats->rx_bytes;
-                       tx_bytes = tstats->tx_bytes;
-               } while (u64_stats_fetch_retry_bh(&tstats->syncp, start));
-
-               tot->rx_packets += rx_packets;
-               tot->tx_packets += tx_packets;
-               tot->rx_bytes   += rx_bytes;
-               tot->tx_bytes   += tx_bytes;
-       }
-
-       tot->multicast = dev->stats.multicast;
-
-       tot->rx_crc_errors = dev->stats.rx_crc_errors;
-       tot->rx_fifo_errors = dev->stats.rx_fifo_errors;
-       tot->rx_length_errors = dev->stats.rx_length_errors;
-       tot->rx_frame_errors = dev->stats.rx_frame_errors;
-       tot->rx_errors = dev->stats.rx_errors;
-
-       tot->tx_fifo_errors = dev->stats.tx_fifo_errors;
-       tot->tx_carrier_errors = dev->stats.tx_carrier_errors;
-       tot->tx_dropped = dev->stats.tx_dropped;
-       tot->tx_aborted_errors = dev->stats.tx_aborted_errors;
-       tot->tx_errors = dev->stats.tx_errors;
-
-       tot->collisions  = dev->stats.collisions;
-
-       return tot;
+       rcu_read_unlock();
+       return (struct rtable *)dst;
 }
-EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64);
 
 static bool ip_tunnel_key_match(const struct ip_tunnel_parm *p,
                                __be16 flags, __be32 key)
@@ -467,9 +416,6 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
 
 #ifdef CONFIG_NET_IPGRE_BROADCAST
        if (ipv4_is_multicast(iph->daddr)) {
-               /* Looped back packet, drop it! */
-               if (rt_is_output_route(skb_rtable(skb)))
-                       goto drop;
                tunnel->dev->stats.multicast++;
                skb->pkt_type = PACKET_BROADCAST;
        }
@@ -584,7 +530,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
        struct flowi4 fl4;
        u8     tos, ttl;
        __be16 df;
-       struct rtable *rt = NULL;       /* Route to the other host */
+       struct rtable *rt;              /* Route to the other host */
        unsigned int max_headroom;      /* The extra header space needed */
        __be32 dst;
        int err;
@@ -657,8 +603,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
        init_tunnel_flow(&fl4, protocol, dst, tnl_params->saddr,
                         tunnel->parms.o_key, RT_TOS(tos), tunnel->parms.link);
 
-       if (connected)
-               rt = (struct rtable *)tunnel_dst_check(tunnel, 0);
+       rt = connected ? tunnel_rtable_get(tunnel, 0) : NULL;
 
        if (!rt) {
                rt = ip_route_output_key(tunnel->net, &fl4);
@@ -766,7 +711,7 @@ static void ip_tunnel_update(struct ip_tunnel_net *itn,
                if (set_mtu)
                        dev->mtu = mtu;
        }
-       tunnel_dst_reset_all(t);
+       ip_tunnel_dst_reset_all(t);
        netdev_state_change(dev);
 }
 
@@ -1095,7 +1040,7 @@ void ip_tunnel_uninit(struct net_device *dev)
        if (itn->fb_tunnel_dev != dev)
                ip_tunnel_del(netdev_priv(dev));
 
-       tunnel_dst_reset_all(tunnel);
+       ip_tunnel_dst_reset_all(tunnel);
 }
 EXPORT_SYMBOL_GPL(ip_tunnel_uninit);