dccp: List management for new feature negotiation

This adds list initial fields and list management functions for the
new feature negotiation implementation.

Thanks to Arnaldo for suggestions and improvements.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index b4bc6e095a0e..d6fed595a3ff 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -441,6 +441,8 @@ static inline int dccp_ack_pending(const struct sock *sk)
                inet_csk_ack_scheduled(sk);
 }
 
+extern void dccp_feat_list_purge(struct list_head *fn_list);
+
 extern int dccp_insert_options(struct sock *sk, struct sk_buff *skb);
 extern int dccp_insert_options_rsk(struct dccp_request_sock*, struct sk_buff*);
 extern int dccp_insert_option_elapsed_time(struct sock *sk,