xfrm6: Remove xfrm_tunnel_notifier

This was used from vti and is replaced by the IPsec protocol
multiplexer hooks. It is now unused, so remove it.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 6304ec3..7c13ef6 100644 (file)
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1393,12 +1393,6 @@ struct xfrm_tunnel {
        int priority;
 };
 
-struct xfrm_tunnel_notifier {
-       int (*handler)(struct sk_buff *skb);
-       struct xfrm_tunnel_notifier __rcu *next;
-       int priority;
-};
-
 struct xfrm6_tunnel {
        int (*handler)(struct sk_buff *skb);
        int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
@@ -1554,8 +1548,6 @@ int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char prot
 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
-int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
-int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
 int xfrm6_extract_header(struct sk_buff *skb);
 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi);

diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index cb04f7a..901ef6f 100644 (file)
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -18,65 +18,6 @@
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
-/* Informational hook. The decap is still done here. */
-static struct xfrm_tunnel_notifier __rcu *rcv_notify_handlers __read_mostly;
-static DEFINE_MUTEX(xfrm6_mode_tunnel_input_mutex);
-
-int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler)
-{
-       struct xfrm_tunnel_notifier __rcu **pprev;
-       struct xfrm_tunnel_notifier *t;
-       int ret = -EEXIST;
-       int priority = handler->priority;
-
-       mutex_lock(&xfrm6_mode_tunnel_input_mutex);
-
-       for (pprev = &rcv_notify_handlers;
-            (t = rcu_dereference_protected(*pprev,
-            lockdep_is_held(&xfrm6_mode_tunnel_input_mutex))) != NULL;
-            pprev = &t->next) {
-               if (t->priority > priority)
-                       break;
-               if (t->priority == priority)
-                       goto err;
-
-       }
-
-       handler->next = *pprev;
-       rcu_assign_pointer(*pprev, handler);
-
-       ret = 0;
-
-err:
-       mutex_unlock(&xfrm6_mode_tunnel_input_mutex);
-       return ret;
-}
-EXPORT_SYMBOL_GPL(xfrm6_mode_tunnel_input_register);
-
-int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler)
-{
-       struct xfrm_tunnel_notifier __rcu **pprev;
-       struct xfrm_tunnel_notifier *t;
-       int ret = -ENOENT;
-
-       mutex_lock(&xfrm6_mode_tunnel_input_mutex);
-       for (pprev = &rcv_notify_handlers;
-            (t = rcu_dereference_protected(*pprev,
-            lockdep_is_held(&xfrm6_mode_tunnel_input_mutex))) != NULL;
-            pprev = &t->next) {
-               if (t == handler) {
-                       *pprev = handler->next;
-                       ret = 0;
-                       break;
-               }
-       }
-       mutex_unlock(&xfrm6_mode_tunnel_input_mutex);
-       synchronize_net();
-
-       return ret;
-}
-EXPORT_SYMBOL_GPL(xfrm6_mode_tunnel_input_deregister);
-
 static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
 {
        const struct ipv6hdr *outer_iph = ipv6_hdr(skb);
@@ -130,7 +71,6 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 
 static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-       struct xfrm_tunnel_notifier *handler;
        int err = -EINVAL;
 
        if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
@@ -138,9 +78,6 @@ static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
        if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
                goto out;
 
-       for_each_input_rcu(rcv_notify_handlers, handler)
-               handler->handler(skb);
-
        err = skb_unclone(skb, GFP_ATOMIC);
        if (err)
                goto out;