netdev - [PATCH net-next 1/4] rtnetlink: Add get_link_af_size_filtered to rtnl_af

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Message-Id: <1444802314-28830-2-git-send-email-ronen.arad@intel.com>
Date:	Tue, 13 Oct 2015 22:58:31 -0700
From:	Ronen Arad <ronen.arad@...el.com>
To:	netdev@...r.kernel.org
Cc:	Ronen Arad <ronen.arad@...el.com>
Subject: [PATCH net-next 1/4] rtnetlink: Add get_link_af_size_filtered to rtnl_af_ops

get_link_af_size_filtered() - a filtering-mask aware alternative
function is added to struct rtnl_af_ops in order to allow for
"rightsizing" the IFLA_AF_SPEC calculation in if_nlmsg_size().
This significantly reduces the message size when at least one netdev has
large number of VLANs.

Signed-off-by: Ronen Arad <ronen.arad@...el.com>
---
 include/net/rtnetlink.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index aff6ceb..96df9bb 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -130,6 +130,8 @@ struct rtnl_af_ops {
 						    const struct nlattr *attr);
 	int			(*set_link_af)(struct net_device *dev,
 					       const struct nlattr *attr);
+	size_t			(*get_link_af_size_filtered)(const struct net_device *dev,
+							     u32 ext_filter_mask);
 };
 
 void __rtnl_af_unregister(struct rtnl_af_ops *ops);
-- 
2.1.0

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