inet: Kill FLOWI_FLAG_PRECOW_METRICS.

No longer needed.  TCP writes metrics, but now in it's own special
cache that does not dirty the route metrics.  Therefore there is no
longer any reason to pre-cow metrics in this way.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 4 insertions, 11 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 034ddbe42adf..76825be3b643 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -375,7 +375,7 @@ struct dst_entry *inet_csk_route_req(struct sock *sk,
         const struct inet_request_sock *ireq = inet_rsk(req);
         struct ip_options_rcu *opt = inet_rsk(req)->opt;
         struct net *net = sock_net(sk);
-        int flags = inet_sk_flowi_flags(sk) & ~FLOWI_FLAG_PRECOW_METRICS;
+        int flags = inet_sk_flowi_flags(sk);
 
         if (nocache)
                 flags |= FLOWI_FLAG_RT_NOCACHE;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e376354dcb65..d4834e2914a0 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1658,7 +1658,7 @@ void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,
         struct rtable *rt;
 
         flowi4_init_output(&fl4, oif, mark, RT_TOS(iph->tos), RT_SCOPE_UNIVERSE,
-                           protocol, flow_flags | FLOWI_FLAG_PRECOW_METRICS,
+                           protocol, flow_flags,
                            iph->daddr, iph->saddr, 0, 0);
         rt = __ip_route_output_key(net, &fl4);
         if (!IS_ERR(rt)) {
@@ -1836,18 +1836,11 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
 {
         struct inet_peer_base *base;
         struct inet_peer *peer;
-        int create = 0;
-
-        /* If a peer entry exists for this destination, we must hook
-         * it up in order to get at cached metrics.
-         */
-        if (fl4 && (fl4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
-                create = 1;
 
         base = inetpeer_base_ptr(rt->_peer);
         BUG_ON(!base);
 
-        peer = inet_getpeer_v4(base, rt->rt_dst, create);
+        peer = inet_getpeer_v4(base, rt->rt_dst, 0);
         if (peer) {
                 __rt_set_peer(rt, peer);
                 rt->rt_peer_genid = rt_peer_genid();
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0c0684753781..b7eb51e1a0e1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1093,7 +1093,7 @@ void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
         memset(&fl6, 0, sizeof(fl6));
         fl6.flowi6_oif = oif;
         fl6.flowi6_mark = mark;
-        fl6.flowi6_flags = FLOWI_FLAG_PRECOW_METRICS;
+        fl6.flowi6_flags = 0;
         fl6.daddr = iph->daddr;
         fl6.saddr = iph->saddr;
         fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK;