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From: David Sterba <dsterba@suse.cz>
To: "Theodore Y. Ts'o" <tytso@mit.edu>, Jann Horn <jannh@google.com>,
	Richard Henderson <rth@twiddle.net>,
	Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
	Matt Turner <mattst88@gmail.com>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	linux-fsdevel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
	Dave Chinner <david@fromorbit.com>, Pavel Machek <pavel@ucw.cz>,
	linux-arch@vger.kernel.org, linux-api@vger.kernel.org
Subject: Re: [PATCH v4 1/3] fs: hoist EFSCORRUPTED definition into uapi header
Date: Mon, 21 Jan 2019 23:14:17 +0100
Message-ID: <20190121221417.GK2900@twin.jikos.cz> (raw)
In-Reply-To: <20190121215454.GA12996@mit.edu>

On Mon, Jan 21, 2019 at 04:54:54PM -0500, Theodore Y. Ts'o wrote:
> On Fri, Jan 18, 2019 at 05:14:38PM +0100, Jann Horn wrote:
> > Multiple filesystems can already return EFSCORRUPTED errors to userspace;
> > however, so far, definitions of EFSCORRUPTED were in filesystem-private
> > headers.
> > 
> > I wanted to use EUCLEAN to indicate data corruption in the VFS layer;
> > Dave Chinner says that I should instead hoist the definitions of
> > EFSCORRUPTED into the UAPI header and then use EFSCORRUPTED.
> > 
> > This patch is marked for stable backport because it is a prerequisite for
> > the following patch.
> > 
> > Cc: stable@vger.kernel.org
> > Suggested-by: Dave Chinner <david@fromorbit.com>
> > Signed-off-by: Jann Horn <jannh@google.com>
> 
> Before we enshrine the overloading of EUCLEAN and EFSCORRUPTED, I
> wonder if we should at least consider the option of assigning a new
> error code number for EFSCORRUPTED.  The downside of doing this is
> that for a while, older versions glibc won't have strerror/perror
> translation for the new error code.  On the other hand, I'm not sure
> it will be that much more confusing to the average user than
> "Structure needs cleaning".  :-)
>
> The upside of assigning a new error code is that in a year or two,
> we'll actually have an intelligible error message showing up in log
> files and in user's terminals.

I vote for a new code with a better message than EUCLEAN provides.

  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-18 16:14 Jann Horn
2019-01-18 16:14 ` [PATCH v4 2/3] fs: don't let getdents return bogus names Jann Horn
2019-01-20 22:17   ` Dave Chinner
2019-01-18 16:14 ` [PATCH v4 3/3] fs: let filldir_t return bool instead of an error code Jann Horn
2019-01-20 22:40   ` Dave Chinner
2019-01-21 15:49     ` Jann Horn
2019-01-21 22:24       ` Dave Chinner
2019-01-23 15:07         ` Jann Horn
2019-01-31 20:39           ` Darrick J. Wong
2019-01-18 16:23 ` [PATCH v4 1/3] fs: hoist EFSCORRUPTED definition into uapi header Arnd Bergmann
2019-01-20 22:13 ` Dave Chinner
2019-01-21 21:54 ` Theodore Y. Ts'o
2019-01-21 22:13   ` Dave Chinner
2019-01-21 22:14   ` David Sterba [this message]
2019-01-21 23:51   ` Darrick J. Wong
2019-01-22  0:38     ` Theodore Y. Ts'o

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