linux-kernel - Re: [PATCH 1/8] af_unix: take address assignment/hash insertion into a new helper

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Message-ID: <CAM_iQpVpJwRNKjKo3p1jFvCjYAXAY83ux09rd2Mt0hKmvx=RgQ@mail.gmail.com>
Date:   Sat, 20 Feb 2021 11:12:33 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Denis Kirjanov <kda@...ux-powerpc.org>,
        Christoph Hellwig <hch@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 1/8] af_unix: take address assignment/hash insertion into
 a new helper

On Thu, Feb 18, 2021 at 8:22 PM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> Duplicated logics in all bind variants (autobind, bind-to-path,
> bind-to-abstract) gets taken into a common helper.
>
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---
>  net/unix/af_unix.c | 30 +++++++++++++++---------------
>  1 file changed, 15 insertions(+), 15 deletions(-)
>
> diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
> index 41c3303c3357..179b4fe837e6 100644
> --- a/net/unix/af_unix.c
> +++ b/net/unix/af_unix.c
> @@ -262,6 +262,16 @@ static void __unix_insert_socket(struct hlist_head *list, struct sock *sk)
>         sk_add_node(sk, list);
>  }
>
> +static void __unix_set_addr(struct sock *sk, struct unix_address *addr,
> +                           unsigned hash)
> +       __releases(&unix_table_lock)
> +{
> +       __unix_remove_socket(sk);
> +       smp_store_release(&unix_sk(sk)->addr, addr);
> +       __unix_insert_socket(&unix_socket_table[hash], sk);
> +       spin_unlock(&unix_table_lock);

Please take the unlock out, it is clearly an anti-pattern.

And please Cc netdev for networking changes.

Thanks.