netdev - [PATCH net v2 1/2] genetlink: add function genl_has

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Message-Id: <1411029064-15376-1-git-send-email-nicolas.dichtel@6wind.com>
Date:	Thu, 18 Sep 2014 10:31:03 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	pshelar@...ira.com
Cc:	davem@...emloft.net, dev@...nvswitch.org, netdev@...r.kernel.org,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>
Subject: [PATCH net v2 1/2] genetlink: add function genl_has_listeners()

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

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
---

v2: add patch 1/2

 include/net/genetlink.h | 8 ++++++++
 1 file changed, 8 insertions(+)

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 */
-- 
2.1.0

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