netdev - [PATCH net-next RFC v1 10/27] afnetns: add ifa_find_afnetns

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Message-Id: <20170312230151.5185-11-hannes@stressinduktion.org>
Date:   Mon, 13 Mar 2017 00:01:34 +0100
From:   Hannes Frederic Sowa <hannes@...essinduktion.org>
To:     netdev@...r.kernel.org
Subject: [PATCH net-next RFC v1 10/27] afnetns: add ifa_find_afnetns_rcu

Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
---
 include/linux/inetdevice.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index eb1b662f62626f..01cbcfe93383b7 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -180,6 +180,17 @@ static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
 	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
 }
 
+static inline struct afnetns *ifa_find_afnetns_rcu(struct net *net, __be32 addr)
+{
+#if IS_ENABLED(CONFIG_AFNETNS)
+	struct in_ifaddr *ifa = ifa_find_rcu(net, addr);
+
+	return ifa ? ifa->afnetns : net->afnet_ns;
+#else
+	return NULL;
+#endif
+}
+
 /*
  *	Check if a mask is acceptable.
  */
-- 
2.9.3