ipv4: Remove flowi from struct rtable.

The only necessary parts are the src/dst addresses, the
interface indexes, the TOS, and the mark.

The rest is unnecessary bloat, which amounts to nearly
50 bytes on 64-bit.

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

1 files changed, 13 insertions, 9 deletions

diff --git a/include/net/route.h b/include/net/route.h
index 8905d90e0044..9257f5f17337 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -53,16 +53,20 @@ struct fib_info;
 struct rtable {
         struct dst_entry        dst;
 
-        /* Cache lookup keys */
-        struct flowi            fl;
+        /* Lookup key. */
+        __be32                  rt_key_dst;
+        __be32                  rt_key_src;
 
         int                     rt_genid;
         unsigned                rt_flags;
         __u16                   rt_type;
+        __u8                    rt_tos;
 
         __be32                  rt_dst; /* Path destination     */
         __be32                  rt_src; /* Path source          */
         int                     rt_iif;
+        int                     rt_oif;
+        __u32                   rt_mark;
 
         /* Info on neighbour */
         __be32                  rt_gateway;
@@ -76,12 +80,12 @@ struct rtable {
 
 static inline bool rt_is_input_route(struct rtable *rt)
 {
-        return rt->fl.iif != 0;
+        return rt->rt_iif != 0;
 }
 
 static inline bool rt_is_output_route(struct rtable *rt)
 {
-        return rt->fl.iif == 0;
+        return rt->rt_iif == 0;
 }
 
 struct ip_rt_acct {
@@ -212,11 +216,11 @@ static inline struct rtable *ip_route_newports(struct rtable *rt,
                                                __be16 dport, struct sock *sk)
 {
         if (sport != orig_sport || dport != orig_dport) {
-                struct flowi fl = { .oif = rt->fl.oif,
-                                    .mark = rt->fl.mark,
-                                    .fl4_dst = rt->fl.fl4_dst,
-                                    .fl4_src = rt->fl.fl4_src,
-                                    .fl4_tos = rt->fl.fl4_tos,
+                struct flowi fl = { .oif = rt->rt_oif,
+                                    .mark = rt->rt_mark,
+                                    .fl4_dst = rt->rt_key_dst,
+                                    .fl4_src = rt->rt_key_src,
+                                    .fl4_tos = rt->rt_tos,
                                     .proto = protocol,
                                     .fl_ip_sport = sport,
                                     .fl_ip_dport = dport };