linux-kernel - Re: [PATCH v2 22/35] vfs: don't open real

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Message-ID: <CAOQ4uxi-_0xkSgHnzBhJLnWTyz_m0VXTx9206k2vZA6dgtQYmQ@mail.gmail.com>
Date:   Mon, 7 May 2018 13:27:19 +0300
From:   Amir Goldstein <amir73il@...il.com>
To:     Miklos Szeredi <mszeredi@...hat.com>
Cc:     overlayfs <linux-unionfs@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v2 22/35] vfs: don't open real

On Mon, May 7, 2018 at 11:37 AM, Miklos Szeredi <mszeredi@...hat.com> wrote:
> Let overlayfs do its thing when opening a file.
>
> This enables stacking and fixes the corner case when a file is opened for
> read, modified through a writable open, and data is read from the read-only
> file.  After this patch the read-only open will not return stale data even
> in this case.
>

So now you can get rid of ovl_do_check_copy_up() and the check_copy_up
module param ;-)

Thanks,
Amir.