linux-kernel - Re: [PATCH 1/8] vfs - change d_manage() to take a struct path

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Message-ID: <1476229649.3108.1.camel@themaw.net>
Date:   Wed, 12 Oct 2016 07:47:29 +0800
From:   Ian Kent <raven@...maw.net>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        autofs mailing list <autofs@...r.kernel.org>,
        Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Omar Sandoval <osandov@...ndov.com>,
        Al Viro <viro@...IV.linux.org.uk>
Subject: Re: [PATCH 1/8] vfs - change d_manage() to take a struct path

On Tue, 2016-10-11 at 11:04 -0500, Eric W. Biederman wrote:
> Ian Kent <raven@...maw.net> writes:
> 
> > For the autofs module to be able to reliably check if a dentry is a
> > mountpoint in a multiple namespace environment the ->d_manage() dentry
> > operation will need to take a path argument instead of a dentry.
> 
> Taking a quick look overall I see no issues with this series.  Overall
> it seems straight forward.
> 
> On the nit side I expect saying const struct path * in the functions
> that now take a struct path would be useful.
> 
> I suspect it would also be useful to say
> 	const struct path *path;
>         path = &file->f_path;
> 
> In the one part of the code where you do that.  Instead of copying the
> path out of the struct file.
> 
> Overall I expect that will keep down bugs at no reduction in usability.
> Just a statement that the struct path won't change when it is passed
> to various functions.

Thanks Eric, that's a good suggestion for a follow up patch, will do.

Ian