From 1104d9ba443a3972052ea4eaa01e51f9ee084652 Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Fri, 14 Oct 2016 11:25:36 -0700 Subject: lwtunnel: Add destroy state operation Users of lwt tunnels may set up some secondary state in build_state function. Add a corresponding destroy_state function to allow users to clean up state. This destroy state function is called from lwstate_free. Also, we now free lwstate using kfree_rcu so user can assume structure is not freed before rcu. Acked-by: Roopa Prabhu Signed-off-by: Tom Herbert Signed-off-by: David S. Miller --- net/core/lwtunnel.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'net') diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c index e5f84c26ba1a..88fd64250b02 100644 --- a/net/core/lwtunnel.c +++ b/net/core/lwtunnel.c @@ -130,6 +130,19 @@ int lwtunnel_build_state(struct net_device *dev, u16 encap_type, } EXPORT_SYMBOL(lwtunnel_build_state); +void lwtstate_free(struct lwtunnel_state *lws) +{ + const struct lwtunnel_encap_ops *ops = lwtun_encaps[lws->type]; + + if (ops->destroy_state) { + ops->destroy_state(lws); + kfree_rcu(lws, rcu); + } else { + kfree(lws); + } +} +EXPORT_SYMBOL(lwtstate_free); + int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate) { const struct lwtunnel_encap_ops *ops; -- cgit v1.2.3-59-g8ed1b