ipv4: Cache input routes in fib_info nexthops.

Caching input routes is slightly simpler than output routes, since we
don't need to be concerned with nexthop exceptions.  (locally
destined, and routed packets, never trigger PMTU events or redirects
that will be processed by us).

However, we have to elide caching for the DIRECTSRC and non-zero itag
cases.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index fb62c590360e..e69c3a47153d 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -82,6 +82,7 @@ struct fib_nh {
         __be32                  nh_saddr;
         int                     nh_saddr_genid;
         struct rtable           *nh_rth_output;
+        struct rtable           *nh_rth_input;
         struct fnhe_hash_bucket *nh_exceptions;
 };