__res; \
})
+extern int nfnetlink_has_listeners(unsigned int group);
extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group,
int echo);
extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);
group = NFNLGRP_CONNTRACK_UPDATE;
} else
return NOTIFY_DONE;
-
- /* FIXME: Check if there are any listeners before, don't hurt performance */
-
+
+ if (!nfnetlink_has_listeners(group))
+ return NOTIFY_DONE;
+
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
return NOTIFY_DONE;
group = NFNLGRP_CONNTRACK_UPDATE;
} else
return NOTIFY_DONE;
-
- /* FIXME: Check if there are any listeners before, don't hurt performance */
-
+
+ if (!nfnetlink_has_listeners(group))
+ return NOTIFY_DONE;
+
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
return NOTIFY_DONE;
return 0;
}
+int nfnetlink_has_listeners(unsigned int group)
+{
+ return netlink_has_listeners(nfnl, group);
+}
+EXPORT_SYMBOL_GPL(nfnetlink_has_listeners);
+
int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
{
gfp_t allocation = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;