1 files changed, 19 insertions, 0 deletions

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 1a04c1329362..e1c69d024197 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3059,6 +3059,24 @@ static u32 get_acqseq(void)
         return res;
 }
 
+static bool pfkey_is_alive(const struct km_event *c)
+{
+        struct netns_pfkey *net_pfkey = net_generic(c->net, pfkey_net_id);
+        struct sock *sk;
+        bool is_alive = false;
+
+        rcu_read_lock();
+        sk_for_each_rcu(sk, &net_pfkey->table) {
+                if (pfkey_sk(sk)->registered) {
+                        is_alive = true;
+                        break;
+                }
+        }
+        rcu_read_unlock();
+
+        return is_alive;
+}
+
 static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *xp)
 {
         struct sk_buff *skb;
@@ -3784,6 +3802,7 @@ static struct xfrm_mgr pfkeyv2_mgr =
         .new_mapping    = pfkey_send_new_mapping,
         .notify_policy  = pfkey_send_policy_notify,
         .migrate        = pfkey_send_migrate,
+        .is_alive       = pfkey_is_alive,
 };
 
 static int __net_init pfkey_net_init(struct net *net)