netdev - Re: [PATCH v7 2/3] sock: Move the socket inuse to namespace.

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Date:   Mon, 18 Dec 2017 22:22:11 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     xiyou.wangcong@...il.com
Cc:     xiangxia.m.yue@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v7 2/3] sock: Move the socket inuse to namespace.

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Mon, 18 Dec 2017 13:38:39 -0800

> On Mon, Dec 18, 2017 at 11:30 AM, David Miller <davem@...emloft.net> wrote:
>> From: Tonghao Zhang <xiangxia.m.yue@...il.com>
>> Date: Thu, 14 Dec 2017 05:51:58 -0800
>>
>>> In some case, we want to know how many sockets are in use in
>>> different _net_ namespaces. It's a key resource metric.
>>
>> Useful or not, you're not exporting this value.
>>
>> All this patch series does is convert the existing export of the
>> global tally to add up the per-net values.
>>
>> So if you're not exporting the per-net value on it's own in any way,
>> this patch series isn't achieving the stated goal.
>>
>> I'm not applying this series, sorry.
> 
> 
> This value is already exported via procfs:
> sockstat_seq_show() -> socket_seq_show().
> 
> And the proc file itself should already be per-net:
> 
> static int sockstat_seq_open(struct inode *inode, struct file *file)
> {
>         return single_open_net(inode, file, sockstat_seq_show);
> }
> 
> 
> This patch just makes that value to be per-net too.

You're right, my bad.

I'll keep reviewing this.