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Date:   Wed, 24 Apr 2019 03:02:11 +0000
From:   "Bai, Haiqing" <Haiqing.Bai@...driver.com>
To:     David Miller <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Elmahrad, Abdelghani" <Abdel.Elmahrad@...driver.com>
Subject: RE: [PATCH] net: socket: Exit earlier from __sock_create if
 CONFIG_IPV6 is disabled

Actually I know this clearly,  just bring your attention on this issue , I think this is a mechanism issue.
Though we have no good idea to fix this, but I believe firmly that you kernel experts must have some smart and beautiful solution.
Thanks.


-----Original Message-----
From: David Miller [mailto:davem@...emloft.net] 
Sent: 2019年4月24日 9:43
To: Bai, Haiqing
Cc: netdev@...r.kernel.org; Elmahrad, Abdelghani
Subject: Re: [PATCH] net: socket: Exit earlier from __sock_create if CONFIG_IPV6 is disabled

From: Haiqing Bai <Haiqing.Bai@...driver.com>
Date: Tue, 23 Apr 2019 17:00:23 +0800

> diff --git a/net/socket.c b/net/socket.c
> index 8255f5bda0aa..7927c2bcad65 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -1339,6 +1339,11 @@ int __sock_create(struct net *net, int family, int type, int protocol,
>  	if (type < 0 || type >= SOCK_MAX)
>  		return -EINVAL;
>  
> +#if !(IS_ENABLED(CONFIG_IPV6))
> +	if (family == AF_INET6)
> +		return -EAFNOSUPPORT;
> +#endif

There is no way I am allowing this kind of layering violation.  It's
just rediculous.

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