From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Thu, 18 Sep 2014 08:31:03 +0000 (+0200)
Subject: genetlink: add function genl_has_listeners()
X-Git-Tag: firefly_0821_release~176^2~3193^2~14
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0d566379c5e15a2922dc6bb2ee6a4b7f7a3a0786;p=firefly-linux-kernel-4.4.55.git

genetlink: add function genl_has_listeners()

This function is the counterpart of the function netlink_has_listeners().

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 93695f0e22a5..af10c2cf8a1d 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -394,4 +394,12 @@ static inline int genl_set_err(struct genl_family *family, struct net *net,
 	return netlink_set_err(net->genl_sock, portid, group, code);
 }
 
+static inline int genl_has_listeners(struct genl_family *family,
+				     struct sock *sk, unsigned int group)
+{
+	if (WARN_ON_ONCE(group >= family->n_mcgrps))
+		return -EINVAL;
+	group = family->mcgrp_offset + group;
+	return netlink_has_listeners(sk, group);
+}
 #endif	/* __NET_GENERIC_NETLINK_H */