linux-kernel - Re: [PATCH v4 02/11] fs: Move __scm_install_fd() to __fd_install

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Date:   Wed, 17 Jun 2020 11:40:20 -0700
From:   Kees Cook <keescook@...omium.org>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sargun Dhillon <sargun@...gun.me>,
        Christian Brauner <christian@...uner.io>,
        "David S. Miller" <davem@...emloft.net>,
        Christoph Hellwig <hch@....de>,
        Tycho Andersen <tycho@...ho.ws>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Aleksa Sarai <cyphar@...har.com>,
        Matt Denton <mpdenton@...gle.com>,
        Jann Horn <jannh@...gle.com>, Chris Palmer <palmer@...gle.com>,
        Robert Sesek <rsesek@...gle.com>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>, Shuah Khan <shuah@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "containers@...ts.linux-foundation.org" 
        <containers@...ts.linux-foundation.org>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH v4 02/11] fs: Move __scm_install_fd() to
 __fd_install_received()

On Wed, Jun 17, 2020 at 03:25:41PM +0000, David Laight wrote:
> From: Kees Cook
> > Sent: 16 June 2020 04:25
>  
> > In preparation for users of the "install a received file" logic outside
> > of net/ (pidfd and seccomp), relocate and rename __scm_install_fd() from
> > net/core/scm.c to __fd_install_received() in fs/file.c, and provide a
> > wrapper named fd_install_received_user(), as future patches will change
> > the interface to __fd_install_received().
> 
> Any reason for the leading __ ??

Mainly because of the code pattern of only using the inline helpers to
call it.

-- 
Kees Cook