linux-kernel - Re: [PATCH 03/23] uuid: remove uuid_be defintions from the uapi header

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170521065557.GC13004@lst.de>
Date:   Sun, 21 May 2017 08:55:57 +0200
From:   Christoph Hellwig <hch@....de>
To:     David Howells <dhowells@...hat.com>
Cc:     Christoph Hellwig <hch@....de>, Joe Perches <joe@...ches.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Amir Goldstein <amir73il@...il.com>,
        linux-fsdevel@...r.kernel.org, Shaohua Li <shli@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        linux-xfs@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        linux-api@...r.kernel.org
Subject: Re: [PATCH 03/23] uuid: remove uuid_be defintions from the uapi
        header

On Fri, May 19, 2017 at 11:58:41AM +0100, David Howells wrote:
> Christoph Hellwig <hch@....de> wrote:
> 
> > It's not a userspace ABI, so by defintion it does not break an
> > existing user program.
> 
> That's an invalid assumption.  It is a de facto userspace ABI as it has been
> exposed in /usr/include/linux/uuid.h for some time.

It is never passed through any kernel interface, which by defintion does
not make it an ABI.  And even if it was we are not going to change the
ABI for a uuid_t ever.  We're just changing the internal name, and stop
exposing the old name which was never used in an ABI to userspace.