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>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 9aff11d7278..363ec39228d 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);