linux-kernel - Re: [PATCH] locks: rename file-private locks to file-description locks

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]

Date:	Mon, 21 Apr 2014 12:42:10 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>,
	Rich Felker <dalias@...c.org>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, samba-technical@...ts.samba.org,
	Ganesha NFS List <nfs-ganesha-devel@...ts.sourceforge.net>,
	"Carlos O'Donell" <carlos@...hat.com>,
	libc-alpha <libc-alpha@...rceware.org>,
	"Stefan (metze) Metzmacher" <metze@...ba.org>
Subject: Re: [PATCH] locks: rename file-private locks to file-description
 locks

On Mon, 21 Apr 2014 09:09:27 -0700
Christoph Hellwig <hch@...radead.org> wrote:

> On Mon, Apr 21, 2014 at 04:23:54PM +0200, Michael Kerrisk (man-pages) wrote:
> > 
> > There's at least two problems to solve here:
> > 
> > 1) "File private locks" is _meaningless_ as a term. Elsewhere
> >    (http://thread.gmane.org/gmane.network.samba.internals/76414/focus=1685376),
> 
> It's indeed not a very good choice, but the new name is even worse.
> Just call them non-broken locks? :)  Or not give them a name an just
> append a 2 to the fcntls? :)
> 

I think we'll need to give them a name, if only to make it possible to
document this stuff.

I'm in Jeremy's camp on this one. I don't really care what that name
*is*. I just need to know what it is so I can finish up the docs and
make any changes to the interface that are necessary.

> > 2) The new API constants (F_SETLKP, F_SETLKPW, F_GETLKP) have names
> >    that are visually very close to the traditional POSIX lock names 
> >    (F_SETLK, F_SETLKW, F_GETLK). That's an accident waiting to happen
> >    when someone mistypes in code and/or misses such a misttyping
> >    when reading code. That really must be fixed.
> 
> I don't think so.  They also should have a name very similar because
> they have the same semantics with a major bug fixed.  In fact I can't
> think of anyone who would actually want the old behavior.
> 

On this point, I agree with Michael. It would be easy to mix up the
names when scanning by eye, so I think there is some value in making
these more visually distinct. I rather like the idea of changing
F_SETLKP to F_*_SETLK. The question is what to put in place of the
wildcard there, and that sort of hinges on the name...

-- 
Jeff Layton <jlayton@...hat.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/