netdev - Re: [PATCH] net: remove member 'max' of struct scm_fp

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Date:   Fri, 10 Feb 2017 10:25:43 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     cugyly@....com
Cc:     netdev@...r.kernel.org, Linyu.Yuan@...atel-sbell.com.cn
Subject: Re: [PATCH] net: remove member 'max' of struct scm_fp_list

From: yuan linyu <cugyly@....com>
Date: Fri, 10 Feb 2017 20:11:13 +0800

> From: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>
> 
> SCM_MAX_FD can fully replace it.
> 
> Signed-off-by: yuan linyu <Linyu.Yuan@...atel-sbell.com.cn>

I don't think so:

> @@ -341,7 +332,6 @@ struct scm_fp_list *scm_fp_dup(struct scm_fp_list *fpl)
>  	if (new_fpl) {
>  		for (i = 0; i < fpl->count; i++)
>  			get_file(fpl->fp[i]);
> -		new_fpl->max = new_fpl->count;
>  		new_fpl->user = get_uid(fpl->user);

It's not set the SCM_MAX_FD here, it's set to whatever fpl->count is.

In other words, your patch breaks things.