route: Remove redirect_genid

As we invalidate the inetpeer tree along with the routing cache now,
we don't need a genid to reset the redirect handling when the routing
cache is flushed.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 2 insertions, 11 deletions

diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
index ff04a33acf00..b94765e38e80 100644
--- a/include/net/inetpeer.h
+++ b/include/net/inetpeer.h
@@ -35,7 +35,6 @@ struct inet_peer {
 
         u32                     metrics[RTAX_MAX];
         u32                     rate_tokens;    /* rate limiting for ICMP */
-        int                     redirect_genid;
         unsigned long           rate_last;
         unsigned long           pmtu_expires;
         u32                     pmtu_orig;
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index deea2e96b7f2..d4d61b694fab 100644
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -498,7 +498,6 @@ relookup:
                 p->rate_last = 0;
                 p->pmtu_expires = 0;
                 p->pmtu_orig = 0;
-                p->redirect_genid = 0;
                 memset(&p->redirect_learned, 0, sizeof(p->redirect_learned));
                 INIT_LIST_HEAD(&p->gc_list);
 
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 23ce0c1287ab..019774796174 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -132,7 +132,6 @@ static int ip_rt_mtu_expires __read_mostly	= 10 * 60 * HZ;
 static int ip_rt_min_pmtu __read_mostly         = 512 + 20 + 20;
 static int ip_rt_min_advmss __read_mostly       = 256;
 static int rt_chain_length_max __read_mostly    = 20;
-static int redirect_genid;
 
 static struct delayed_work expires_work;
 static unsigned long expires_ljiffies;
@@ -937,7 +936,6 @@ static void rt_cache_invalidate(struct net *net)
 
         get_random_bytes(&shuffle, sizeof(shuffle));
         atomic_add(shuffle + 1U, &net->ipv4.rt_genid);
-        redirect_genid++;
         inetpeer_invalidate_tree(AF_INET);
 }
 
@@ -1486,10 +1484,8 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 
                                 peer = rt->peer;
                                 if (peer) {
-                                        if (peer->redirect_learned.a4 != new_gw ||
-                                            peer->redirect_genid != redirect_genid) {
+                                        if (peer->redirect_learned.a4 != new_gw) {
                                                 peer->redirect_learned.a4 = new_gw;
-                                                peer->redirect_genid = redirect_genid;
                                                 atomic_inc(&__rt_peer_genid);
                                         }
                                         check_peer_redir(&rt->dst, peer);
@@ -1794,8 +1790,6 @@ static void ipv4_validate_peer(struct rtable *rt)
                 if (peer) {
                         check_peer_pmtu(&rt->dst, peer);
 
-                        if (peer->redirect_genid != redirect_genid)
-                                peer->redirect_learned.a4 = 0;
                         if (peer->redirect_learned.a4 &&
                             peer->redirect_learned.a4 != rt->rt_gateway)
                                 check_peer_redir(&rt->dst, peer);
@@ -1959,8 +1953,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
                 dst_init_metrics(&rt->dst, peer->metrics, false);
 
                 check_peer_pmtu(&rt->dst, peer);
-                if (peer->redirect_genid != redirect_genid)
-                        peer->redirect_learned.a4 = 0;
+
                 if (peer->redirect_learned.a4 &&
                     peer->redirect_learned.a4 != rt->rt_gateway) {
                         rt->rt_gateway = peer->redirect_learned.a4;