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From: Ted Ts'o <tytso-3s7WtUTddSA@public.gmane.org>
To: Bernd Schubert
	<bernd.schubert-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
Cc: linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Fan Yong <yong.fan-KloliPT79xf2eFz/2MeuCQ@public.gmane.org>,
	bfields-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	sandeen-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	Andreas Dilger <adilger-KloliPT79xf2eFz/2MeuCQ@public.gmane.org>
Subject: Re: [PATCH 5 2/4] Return 32/64-bit dir name hash according to usage type
Date: Tue, 6 Mar 2012 10:15:43 -0500	[thread overview]
Message-ID: <20120306151543.GA32282@thunk.org> (raw)
In-Reply-To: <4F55E01B.3060105-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>

On Tue, Mar 06, 2012 at 10:59:55AM +0100, Bernd Schubert wrote:
> Arg, my bad, I introduced this issue when I converted from f_flags
> to f_mode, seems I forgot all of those above :(
> Hrm, I thought I had tested sufficiently, but obviously I did not :(
> Here's the test tool.
> http://www.pci.uni-heidelberg.de/tc/usr/bernd/downloads/test_seekdir/
> 
> While quickly looking, I think it only affects NFSv2, which I think
> I indeed didn't test. I only run tests for 32 bit and 64-bit user
> space and NFSv3. But yes, NFSv2 is an important test too. Not sure
> if I will find time for that today.

I think the problem case to worry about would have been on a 32-bit
NFS server (think embedded/bookshelf NAS servers) and NFSv3, since
that's where the inconsistency would have meant that hash2pos would
use the 32-bit codepath, but pos2maj_hash would use the 64-bit
codepath, and so then...  kablooey.

> Will send an updated version later on.

If it's just those changes, no worries, as I've already fixed up the
f_flags vs. f_mode issue in my copy of the patches.

Let me know if there are any other changes that you'd like to make or
issues that you've spotted.

						- Ted
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WARNING: multiple messages have this Message-ID (diff)
From: "Ted Ts'o" <tytso@mit.edu>
To: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Cc: linux-nfs@vger.kernel.org, linux-ext4@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, Fan Yong <yong.fan@whamcloud.com>,
	bfields@redhat.com, sandeen@redhat.com,
	Andreas Dilger <adilger@whamcloud.com>
Subject: Re: [PATCH 5 2/4] Return 32/64-bit dir name hash according to usage type
Date: Tue, 6 Mar 2012 10:15:43 -0500	[thread overview]
Message-ID: <20120306151543.GA32282@thunk.org> (raw)
In-Reply-To: <4F55E01B.3060105@itwm.fraunhofer.de>

On Tue, Mar 06, 2012 at 10:59:55AM +0100, Bernd Schubert wrote:
> Arg, my bad, I introduced this issue when I converted from f_flags
> to f_mode, seems I forgot all of those above :(
> Hrm, I thought I had tested sufficiently, but obviously I did not :(
> Here's the test tool.
> http://www.pci.uni-heidelberg.de/tc/usr/bernd/downloads/test_seekdir/
> 
> While quickly looking, I think it only affects NFSv2, which I think
> I indeed didn't test. I only run tests for 32 bit and 64-bit user
> space and NFSv3. But yes, NFSv2 is an important test too. Not sure
> if I will find time for that today.

I think the problem case to worry about would have been on a 32-bit
NFS server (think embedded/bookshelf NAS servers) and NFSv3, since
that's where the inconsistency would have meant that hash2pos would
use the 32-bit codepath, but pos2maj_hash would use the 64-bit
codepath, and so then...  kablooey.

> Will send an updated version later on.

If it's just those changes, no worries, as I've already fixed up the
f_flags vs. f_mode issue in my copy of the patches.

Let me know if there are any other changes that you'd like to make or
issues that you've spotted.

						- Ted

  parent reply	other threads:[~2012-03-06 15:15 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-09 13:21 [PATCH 0/4] [RESEND] 32/64 bit llseek hashes (v5) Bernd Schubert
2012-01-09 13:21 ` [PATCH 5 1/4] Add new FMODE flags: FMODE_32bithash and FMODE_64bithash Bernd Schubert
2012-01-09 13:21 ` [PATCH 5 2/4] Return 32/64-bit dir name hash according to usage type Bernd Schubert
2012-03-05 15:59   ` Ted Ts'o
     [not found]     ` <20120305155939.GE21356-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-06  0:40       ` Bernd Schubert
2012-03-06  0:40         ` Bernd Schubert
2012-03-06  2:28         ` Ted Ts'o
     [not found]           ` <20120306022838.GA24323-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-06  9:59             ` Bernd Schubert
2012-03-06  9:59               ` Bernd Schubert
     [not found]               ` <4F55E01B.3060105-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-03-06 15:15                 ` Ted Ts'o [this message]
2012-03-06 15:15                   ` Ted Ts'o
     [not found]                   ` <20120306151543.GA32282-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-07  9:01                     ` Bernd Schubert
2012-03-07  9:01                       ` Bernd Schubert
     [not found]   ` <20120109132148.2616029.68798.stgit-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2012-04-20 20:04     ` Eric Sandeen
2012-04-20 20:04       ` Eric Sandeen
     [not found]       ` <4F91C15B.6070200-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-22 12:51         ` Bernd Schubert
2012-04-22 12:51           ` Bernd Schubert
2012-04-23 20:37           ` Eric Sandeen
     [not found]             ` <4F95BD72.6090200-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-04-23 20:52               ` Bernd Schubert
2012-04-23 20:52                 ` Bernd Schubert
2012-04-23 21:22                 ` Eric Sandeen
     [not found]                 ` <4F95C109.1030401-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-04-23 22:23                   ` Eric Sandeen
2012-04-23 22:23                     ` Eric Sandeen
2012-04-23 22:42                     ` Andreas Dilger
     [not found]                       ` <A754D23B-B946-4E80-ACEA-0E2C2E6FAA2E-KloliPT79xf2eFz/2MeuCQ@public.gmane.org>
2012-04-24 16:10                         ` Bernd Schubert
2012-04-24 16:10                           ` Bernd Schubert
2012-04-24 19:21                           ` Eric Sandeen
2012-04-24 21:07                             ` Bernd Schubert
2012-04-24 22:24                               ` Andreas Dilger
2012-04-25 15:05                                 ` Eric Sandeen
2012-04-25 15:12                                   ` Bernd Schubert
2012-04-25 15:36                                     ` Eric Sandeen
2012-04-24 21:28                             ` Andreas Dilger
2012-04-24 21:26                               ` Eric Sandeen
2012-01-09 13:21 ` [PATCH 5 3/4] nfsd_open(): rename 'int access' to 'int may_flags' in nfsd_open() Bernd Schubert
2012-01-09 13:21 ` [PATCH 5 4/4] nfsd: vfs_llseek() with 32 or 64 bit offsets (hashes) Bernd Schubert
     [not found]   ` <20120109132158.2616029.30467.stgit-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
     [not found]     ` <20120109132153.2616029.26302.stgit-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2012-03-06  0:08       ` [PATCH 5 3/4] nfsd_open(): rename 'int access' to 'int may_flags' in nfsd_open() Ted Ts'o
2012-03-06  0:08         ` Ted Ts'o
     [not found]         ` <20120306000837.GA17164-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-06  2:08           ` J. Bruce Fields
2012-03-06  2:08             ` J. Bruce Fields
2012-03-06 15:18             ` Ted Ts'o
2012-03-06 15:28               ` J. Bruce Fields
2012-03-09 20:51                 ` Ted Ts'o
     [not found]                   ` <20120309205148.GB5635-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-12 15:09                     ` Ted Ts'o
2012-03-12 15:09                       ` Ted Ts'o
     [not found]                       ` <20120312150912.GB12440-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-12 15:49                         ` J. Bruce Fields
2012-03-12 15:49                           ` J. Bruce Fields
2012-03-12 22:22                           ` J. Bruce Fields
2012-03-13 20:01                             ` J. Bruce Fields
     [not found]                               ` <20120313200117.GA21991-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-03-13 20:03                                 ` Bernd Schubert
2012-03-13 20:03                                   ` Bernd Schubert
     [not found]                                   ` <4F5FA827.8020606-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-03-13 20:34                                     ` J. Bruce Fields
2012-03-13 20:34                                       ` J. Bruce Fields
2012-03-13 21:09                                       ` Bernd Schubert
2012-03-13 21:29                                         ` J. Bruce Fields
     [not found]                                           ` <20120313212947.GK31995-spRCxval1Z7TsXDwO4sDpg@public.gmane.org>
2012-03-14 14:32                                             ` Bernd Schubert
2012-03-14 14:32                                               ` Bernd Schubert
     [not found]                                               ` <4F60AC0D.9020204-mPn0NPGs4xGatNDF+KUbs4QuADTiUCJX@public.gmane.org>
2012-03-14 16:05                                                 ` J. Bruce Fields
2012-03-14 16:05                                                   ` J. Bruce Fields
     [not found]                                                   ` <20120314160529.GB31194-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-03-16 21:22                                                     ` Bernd Schubert
2012-03-16 21:22                                                       ` Bernd Schubert
2012-03-19  2:54                                                       ` Ted Ts'o
     [not found]                                                         ` <20120319025455.GD31682-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-19 20:00                                                           ` J. Bruce Fields
2012-03-19 20:00                                                             ` J. Bruce Fields
     [not found]                                                             ` <20120319200041.GA25161-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-03-20  0:10                                                               ` Ted Ts'o
2012-03-20  0:10                                                                 ` Ted Ts'o
2012-04-12 20:49                                                 ` J. Bruce Fields
2012-04-12 20:49                                                   ` J. Bruce Fields
     [not found]                                                   ` <20120412204948.GE6667-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-04-12 21:22                                                     ` Bernd Schubert
2012-04-12 21:22                                                       ` Bernd Schubert
     [not found]                                                       ` <4F8747A1.8060800-97jfqw80gc6171pxa8y+qA@public.gmane.org>
2012-04-12 21:25                                                         ` J. Bruce Fields
2012-04-12 21:25                                                           ` J. Bruce Fields
     [not found]                                       ` <20120313203446.GB21991-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-03-13 21:10                                         ` Ted Ts'o
2012-03-13 21:10                                           ` Ted Ts'o
     [not found]                                           ` <20120313211009.GA11969-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2012-03-13 21:27                                             ` J. Bruce Fields
2012-03-13 21:27                                               ` J. Bruce Fields
2012-01-10 11:27 ` [PATCH 0/4] [RESEND] 32/64 bit llseek hashes (v5) Andreas Dilger
2012-01-11 14:48   ` J. Bruce Fields
     [not found]     ` <20120111144827.GA32381-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2012-01-11 15:31       ` Ted Ts'o
2012-01-11 15:31         ` Ted Ts'o
2012-03-05 12:23         ` Bernd Schubert

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