netdev - Re: [PATCH v5 2/2] sock: Move the socket inuse to namespace.

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Message-ID: <CAM_iQpW=-cOVf0LNwgjaBJzMqBoBunWWyTGXYnGD=F9aB88wNA@mail.gmail.com>
Date:   Fri, 8 Dec 2017 14:09:12 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Tonghao Zhang <xiangxia.m.yue@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH v5 2/2] sock: Move the socket inuse to namespace.

On Thu, Dec 7, 2017 at 9:28 PM, Tonghao Zhang <xiangxia.m.yue@...il.com> wrote:
>
> Release the netlink sock created in kernel(not hold the _net_ namespace):
>

You can avoid counting kernel sock by testing 'kern' in sk_alloc()
and testing 'sk->sk_net_refcnt' in __sk_free().