[PATCH] devfs: Rename TTY_DRIVER_NO_DEVFS to TTY_DRIVER_DYNAMIC_DEV

[safe/jmp/linux-2.6] / net / netfilter / core.c

diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 1ceb1a6..8455a32 100644 (file)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -27,6 +27,29 @@
 
 #include "nf_internals.h"
 
+static DEFINE_SPINLOCK(afinfo_lock);
+
+struct nf_afinfo *nf_afinfo[NPROTO];
+EXPORT_SYMBOL(nf_afinfo);
+
+int nf_register_afinfo(struct nf_afinfo *afinfo)
+{
+       spin_lock(&afinfo_lock);
+       rcu_assign_pointer(nf_afinfo[afinfo->family], afinfo);
+       spin_unlock(&afinfo_lock);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(nf_register_afinfo);
+
+void nf_unregister_afinfo(struct nf_afinfo *afinfo)
+{
+       spin_lock(&afinfo_lock);
+       rcu_assign_pointer(nf_afinfo[afinfo->family], NULL);
+       spin_unlock(&afinfo_lock);
+       synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(nf_unregister_afinfo);
+
 /* In this code, we can be waiting indefinitely for userspace to
  * service a packet if a hook returns NF_QUEUE.  We could keep a count
  * of skbuffs queued for userspace, and not deregister a hook unless
@@ -63,6 +86,34 @@ void nf_unregister_hook(struct nf_hook_ops *reg)
 }
 EXPORT_SYMBOL(nf_unregister_hook);
 
+int nf_register_hooks(struct nf_hook_ops *reg, unsigned int n)
+{
+       unsigned int i;
+       int err = 0;
+
+       for (i = 0; i < n; i++) {
+               err = nf_register_hook(&reg[i]);
+               if (err)
+                       goto err;
+       }
+       return err;
+
+err:
+       if (i > 0)
+               nf_unregister_hooks(reg, i);
+       return err;
+}
+EXPORT_SYMBOL(nf_register_hooks);
+
+void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)
+{
+       unsigned int i;
+
+       for (i = 0; i < n; i++)
+               nf_unregister_hook(&reg[i]);
+}
+EXPORT_SYMBOL(nf_unregister_hooks);
+
 unsigned int nf_iterate(struct list_head *head,
                        struct sk_buff **skb,
                        int hook,