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-rw-r--r--include/linux/netlink.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 6358da5eeee8..7a6c396a263b 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -46,6 +46,7 @@ struct netlink_kernel_cfg {
void (*input)(struct sk_buff *skb);
struct mutex *cb_mutex;
void (*bind)(int group);
+ bool (*compare)(struct net *net, struct sock *sk);
};
extern struct sock *__netlink_kernel_create(struct net *net, int unit,
@@ -84,6 +85,22 @@ int netlink_attachskb(struct sock *sk, struct sk_buff *skb,
void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
int netlink_sendskb(struct sock *sk, struct sk_buff *skb);
+static inline struct sk_buff *
+netlink_skb_clone(struct sk_buff *skb, gfp_t gfp_mask)
+{
+ struct sk_buff *nskb;
+
+ nskb = skb_clone(skb, gfp_mask);
+ if (!nskb)
+ return NULL;
+
+ /* This is a large skb, set destructor callback to release head */
+ if (is_vmalloc_addr(skb->head))
+ nskb->destructor = skb->destructor;
+
+ return nskb;
+}
+
/*
* skb should fit one page. This choice is good for headerless malloc.
* But we should limit to 8K so that userspace does not have to
@@ -144,4 +161,14 @@ static inline int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
return __netlink_dump_start(ssk, skb, nlh, control);
}
+struct netlink_tap {
+ struct net_device *dev;
+ struct module *module;
+ struct list_head list;
+};
+
+extern int netlink_add_tap(struct netlink_tap *nt);
+extern int __netlink_remove_tap(struct netlink_tap *nt);
+extern int netlink_remove_tap(struct netlink_tap *nt);
+
#endif /* __LINUX_NETLINK_H */