From: Wei Wang <wei...@google.com>
This function takes a route as input and tries to update the sernum in
the fib6_node this route is associated with. It will be used in later
commit when adding a cached route into the exception table under that
route.
Signed-off-by: Wei Wang <wei...@google.com>
Signed-off-by: Martin KaFai Lau <ka...@fb.com>
Signed-off-by: Eric Dumazet <eduma...@google.com>
---
include/net/ip6_fib.h | 2 ++
net/ipv6/ip6_fib.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index d060d711a624..152b7b14a5a5 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -358,6 +358,8 @@ void __net_exit fib6_notifier_exit(struct net *net);
unsigned int fib6_tables_seq_read(struct net *net);
int fib6_tables_dump(struct net *net, struct notifier_block *nb);
+void fib6_update_sernum(struct rt6_info *rt);
+
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
int fib6_rules_init(void);
void fib6_rules_cleanup(void);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index e5308d7cbd75..0ba4fbb2f855 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -110,6 +110,20 @@ enum {
FIB6_NO_SERNUM_CHANGE = 0,
};
+void fib6_update_sernum(struct rt6_info *rt)
+{
+ struct fib6_table *table = rt->rt6i_table;
+ struct net *net = dev_net(rt->dst.dev);
+ struct fib6_node *fn;
+
+ write_lock_bh(&table->tb6_lock);
+ fn = rcu_dereference_protected(rt->rt6i_node,
+ lockdep_is_held(&table->tb6_lock));
+ if (fn)
+ fn->fn_sernum = fib6_new_sernum(net);
+ write_unlock_bh(&table->tb6_lock);
+}
+
/*
* Auxiliary address test functions for the radix tree.
*
--
2.14.2.920.gcf0c67979c-goog
