xfrm4: 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>

2 files changed, 0 insertions, 70 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 33112599fa47..8b925288a8bc 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1531,8 +1531,6 @@ 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 xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler);
-int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler);
 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);
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index 31b18152528f..05f2b484954f 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -15,65 +15,6 @@
 #include <net/ip.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(xfrm4_mode_tunnel_input_mutex);
-
-int xfrm4_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(&xfrm4_mode_tunnel_input_mutex);
-
-        for (pprev = &rcv_notify_handlers;
-             (t = rcu_dereference_protected(*pprev,
-             lockdep_is_held(&xfrm4_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(&xfrm4_mode_tunnel_input_mutex);
-        return ret;
-}
-EXPORT_SYMBOL_GPL(xfrm4_mode_tunnel_input_register);
-
-int xfrm4_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(&xfrm4_mode_tunnel_input_mutex);
-        for (pprev = &rcv_notify_handlers;
-             (t = rcu_dereference_protected(*pprev,
-             lockdep_is_held(&xfrm4_mode_tunnel_input_mutex))) != NULL;
-             pprev = &t->next) {
-                if (t == handler) {
-                        *pprev = handler->next;
-                        ret = 0;
-                        break;
-                }
-        }
-        mutex_unlock(&xfrm4_mode_tunnel_input_mutex);
-        synchronize_net();
-
-        return ret;
-}
-EXPORT_SYMBOL_GPL(xfrm4_mode_tunnel_input_deregister);
-
 static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
 {
         struct iphdr *inner_iph = ipip_hdr(skb);
@@ -127,14 +68,8 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
         return 0;
 }
 
-#define for_each_input_rcu(head, handler)       \
-        for (handler = rcu_dereference(head);   \
-             handler != NULL;                   \
-             handler = rcu_dereference(handler->next))
-
 static int xfrm4_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_IPIP)
@@ -143,9 +78,6 @@ static int xfrm4_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
         if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                 goto out;
 
-        for_each_input_rcu(rcv_notify_handlers, handler)
-                handler->handler(skb);
-
         err = skb_unclone(skb, GFP_ATOMIC);
         if (err)
                 goto out;