From 97a47facf3468fb6ebd697324fc2a7245755c417 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Sat, 30 Apr 2016 10:25:27 +0200 Subject: net: rtnetlink: add linkxstats callbacks and attribute Add callbacks to calculate the size and fill link extended statistics which can be split into multiple messages and are dumped via the new rtnl stats API (RTM_GETSTATS) with the IFLA_STATS_LINK_XSTATS attribute. Also add that attribute to the idx mask check since it is expected to be able to save state and resume dumping (e.g. future bridge per-vlan stats will be dumped via this attribute and callbacks). Each link type should nest its private attributes under the per-link type attribute. This allows to have any number of separated private attributes and to avoid one call to get the dev link type. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'net/core/rtnetlink.c') diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index de529a2..d471f09 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -3483,6 +3483,26 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, dev_get_stats(dev, sp); } + if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { + const struct rtnl_link_ops *ops = dev->rtnl_link_ops; + + if (ops && ops->fill_linkxstats) { + int err; + + *idxattr = IFLA_STATS_LINK_XSTATS; + attr = nla_nest_start(skb, + IFLA_STATS_LINK_XSTATS); + if (!attr) + goto nla_put_failure; + + err = ops->fill_linkxstats(skb, dev, prividx); + nla_nest_end(skb, attr); + if (err) + goto nla_put_failure; + *idxattr = 0; + } + } + nlmsg_end(skb, nlh); return 0; @@ -3509,6 +3529,16 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev, if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); + if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { + const struct rtnl_link_ops *ops = dev->rtnl_link_ops; + + if (ops && ops->get_linkxstats_size) { + size += nla_total_size(ops->get_linkxstats_size(dev)); + /* for IFLA_STATS_LINK_XSTATS */ + size += nla_total_size(0); + } + } + return size; } -- cgit v1.1