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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2015-09-11 23:48:48 +0300
committerDavid S. Miller <davem@davemloft.net>2015-09-16 01:25:02 +0300
commitd5566fd72ec1924958fcfd48b65c022c8f7eae64 (patch)
treefb7c5e29238657e89d33320091d8b8ae3d5f78e9 /net/core
parentad1e7b97b3adb91d46f3adb70a7867a50fc274cf (diff)
downloadlinux-d5566fd72ec1924958fcfd48b65c022c8f7eae64.tar.xz
rtnetlink: RTEXT_FILTER_SKIP_STATS support to avoid dumping inet/inet6 stats
Many commonly used functions like getifaddrs() invoke RTM_GETLINK to dump the interface information, and do not need the the AF_INET6 statististics that are always returned by default from rtnl_fill_ifinfo(). Computing the statistics can be an expensive operation that impacts scaling, so it is desirable to avoid this if the information is not needed. This patch adds a the RTEXT_FILTER_SKIP_STATS extended info flag that can be passed with netlink_request() to avoid statistics computation for the ifinfo path. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/rtnetlink.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index a466821d1441..e5452296ec2f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1272,7 +1272,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (!(af = nla_nest_start(skb, af_ops->family)))
goto nla_put_failure;
- err = af_ops->fill_link_af(skb, dev);
+ err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
/*
* Caller may return ENODATA to indicate that there