#include <net/protocol.h>
#include <net/xfrm.h>
-static struct xfrm6_tunnel *tunnel6_handlers;
-static struct xfrm6_tunnel *tunnel46_handlers;
+static struct xfrm6_tunnel *tunnel6_handlers __read_mostly;
+static struct xfrm6_tunnel *tunnel46_handlers __read_mostly;
static DEFINE_MUTEX(tunnel6_mutex);
int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family)
}
handler->next = *pprev;
- *pprev = handler;
+ rcu_assign_pointer(*pprev, handler);
ret = 0;
EXPORT_SYMBOL(xfrm6_tunnel_deregister);
+#define for_each_tunnel_rcu(head, handler) \
+ for (handler = rcu_dereference(head); \
+ handler != NULL; \
+ handler = rcu_dereference(handler->next)) \
+
static int tunnel6_rcv(struct sk_buff *skb)
{
struct xfrm6_tunnel *handler;
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto drop;
- for (handler = tunnel6_handlers; handler; handler = handler->next)
+ for_each_tunnel_rcu(tunnel6_handlers, handler)
if (!handler->handler(skb))
return 0;
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto drop;
- for (handler = tunnel46_handlers; handler; handler = handler->next)
+ for_each_tunnel_rcu(tunnel46_handlers, handler)
if (!handler->handler(skb))
return 0;
{
struct xfrm6_tunnel *handler;
- for (handler = tunnel6_handlers; handler; handler = handler->next)
+ for_each_tunnel_rcu(tunnel6_handlers, handler)
if (!handler->err_handler(skb, opt, type, code, offset, info))
break;
}