ipv4: Allocate fib metrics dynamically.

This is the initial gateway towards super-sharing metrics
if they are all set to zero for a route.

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

2 files changed, 5 insertions, 1 deletions

diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 65d1fcdbc63b..2c0508a6e07c 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -77,7 +77,7 @@ struct fib_info {
         int                     fib_protocol;
         __be32                  fib_prefsrc;
         u32                     fib_priority;
-        u32                     fib_metrics[RTAX_MAX];
+        u32                     *fib_metrics;
 #define fib_mtu fib_metrics[RTAX_MTU-1]
 #define fib_window fib_metrics[RTAX_WINDOW-1]
 #define fib_rtt fib_metrics[RTAX_RTT-1]
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 9aff11d7278f..363ec39228d3 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -152,6 +152,7 @@ static void free_fib_info_rcu(struct rcu_head *head)
 {
         struct fib_info *fi = container_of(head, struct fib_info, rcu);
 
+        kfree(fi->fib_metrics);
         kfree(fi);
 }
 
@@ -742,6 +743,9 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
         fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct fib_nh), GFP_KERNEL);
         if (fi == NULL)
                 goto failure;
+        fi->fib_metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
+        if (!fi->fib_metrics)
+                goto failure;
         fib_info_cnt++;
 
         fi->fib_net = hold_net(net);