netdev - Re: [patch net-next v9 2/3] net: core: Add offload stats to if_stats

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Date:   Fri, 16 Sep 2016 10:07:03 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>, nogahf@...lanox.com,
        Ido Schimmel <idosch@...lanox.com>, eladr@...lanox.com,
        yotamg@...lanox.com, ogerlitz@...lanox.com,
        Roopa Prabhu <roopa@...ulusnetworks.com>,
        linville@...driver.com, tgraf@...g.ch,
        Andy Gospodarek <gospo@...ulusnetworks.com>, sfeldma@...il.com,
        sd@...asysnail.net, eranbe@...lanox.com, ast@...mgrid.com,
        edumazet@...gle.com, hannes@...essinduktion.org,
        f.fainelli@...il.com, dsa@...ulusnetworks.com
Subject: Re: [patch net-next v9 2/3] net: core: Add offload stats to
 if_stats_msg

Fri, Sep 16, 2016 at 10:00:46AM CEST, nikolay@...ulusnetworks.com wrote:
>
>> On Sep 14, 2016, at 12:28 PM, Jiri Pirko <jiri@...nulli.us> wrote:
>> 
>> From: Nogah Frankel <nogahf@...lanox.com>
>> 
>> Add a nested attribute of offload stats to if_stats_msg
>> named IFLA_STATS_LINK_OFFLOAD_XSTATS.
>> Under it, add SW stats, meaning stats only per packets that went via
>> slowpath to the cpu, named IFLA_OFFLOAD_XSTATS_CPU_HIT.
>> 
>> Signed-off-by: Nogah Frankel <nogahf@...lanox.com>
>> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
>> ---
>> include/uapi/linux/if_link.h |   9 ++++
>> net/core/rtnetlink.c         | 111 +++++++++++++++++++++++++++++++++++++++++--
>> 2 files changed, 116 insertions(+), 4 deletions(-)
>> 
>[snip]
>> @@ -3655,6 +3737,24 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
>> 		}
>> 	}
>> 
>> +	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
>> +			     *idxattr)) {
>> +		*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
>> +		attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
>> +		if (!attr)
>> +			goto nla_put_failure;
>> +
>> +		err = rtnl_get_offload_stats(skb, dev, prividx);
>> +		if (err == -ENODATA)
>> +			nla_nest_cancel(skb, attr);
>> +		else
>> +			nla_nest_end(skb, attr);
>> +
>> +		if ((err) && (err != -ENODATA))
>                       ^^^^       ^^^^^^^^^^^^^^^^^^
>The extra braces are still there. [1]

:( Will fix. Thanks.

>The rest looks good to me.
>
>Thanks,
> Nik
>
>[1] http://www.spinics.net/lists/netdev/msg394257.html
>
>> +			goto nla_put_failure;
>> +		*idxattr = 0;
>> +	}
>> +
>> 	nlmsg_end(skb, nlh);
>> 
>> 	return 0;
>> @@ -3708,6 +3808,9 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
>> 		}
>> 	}
>> 
>> +	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
>> +		size += rtnl_get_offload_stats_size(dev);
>> +
>> 	return size;
>> }
>> 
>> -- 
>> 2.5.5
>> 
>