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

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Message-ID: <87zimazxcc.fsf@x220.int.ebiederm.org>
Date:   Tue, 11 Oct 2016 11:04:03 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Ian Kent <raven@...maw.net>
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

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.

Eric