From: Christoph Hellwig <hch@lst.de>
To: Dave Chinner <david@fromorbit.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
linux-nfs@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
xfs@oss.sgi.com
Subject: Re: panic on 4.20 server exporting xfs filesystem
Date: Thu, 5 Mar 2015 14:19:01 +0100 [thread overview]
Message-ID: <20150305131901.GB16235@lst.de> (raw)
In-Reply-To: <20150304044141.GQ18360@dastard>
On Wed, Mar 04, 2015 at 03:41:41PM +1100, Dave Chinner wrote:
> As I understand it, nothing will prevent this - if you don't change
> the UUID on the filesystem when you clone it, then the UUID will
> still match and writes can be directed to any block deice with a
> matching offset/UUID pair.
Unfortunately that's the case indeed. The whole discovery part of
the block layout protocol is fundamentally flawed, as is the recall
part. This is my attempt to fix it, but I have no idea how to proceed
from posting my draft to the IETF to actually making it a standard:
http://tools.ietf.org/html/draft-hellwig-nfsv4-scsi-layout-00
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Dave Chinner <david@fromorbit.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Christoph Hellwig <hch@lst.de>,
linux-nfs@vger.kernel.org, xfs@oss.sgi.com
Subject: Re: panic on 4.20 server exporting xfs filesystem
Date: Thu, 5 Mar 2015 14:19:01 +0100 [thread overview]
Message-ID: <20150305131901.GB16235@lst.de> (raw)
In-Reply-To: <20150304044141.GQ18360@dastard>
On Wed, Mar 04, 2015 at 03:41:41PM +1100, Dave Chinner wrote:
> As I understand it, nothing will prevent this - if you don't change
> the UUID on the filesystem when you clone it, then the UUID will
> still match and writes can be directed to any block deice with a
> matching offset/UUID pair.
Unfortunately that's the case indeed. The whole discovery part of
the block layout protocol is fundamentally flawed, as is the recall
part. This is my attempt to fix it, but I have no idea how to proceed
from posting my draft to the IETF to actually making it a standard:
http://tools.ietf.org/html/draft-hellwig-nfsv4-scsi-layout-00
next prev parent reply other threads:[~2015-03-05 13:19 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 22:10 panic on 4.20 server exporting xfs filesystem J. Bruce Fields
2015-03-03 22:10 ` J. Bruce Fields
2015-03-03 22:44 ` Dave Chinner
2015-03-03 22:44 ` Dave Chinner
2015-03-04 2:08 ` J. Bruce Fields
2015-03-04 2:08 ` J. Bruce Fields
2015-03-04 4:41 ` Dave Chinner
2015-03-04 4:41 ` Dave Chinner
2015-03-05 13:19 ` Christoph Hellwig [this message]
2015-03-05 13:19 ` Christoph Hellwig
2015-03-05 15:21 ` J. Bruce Fields
2015-03-05 15:21 ` J. Bruce Fields
2015-03-08 13:08 ` Tom Haynes
2015-03-08 13:08 ` Tom Haynes
2015-03-04 15:54 ` J. Bruce Fields
2015-03-04 15:54 ` J. Bruce Fields
2015-03-04 22:09 ` Dave Chinner
2015-03-04 22:09 ` Dave Chinner
2015-03-04 22:27 ` J. Bruce Fields
2015-03-04 22:27 ` J. Bruce Fields
2015-03-04 22:45 ` Dave Chinner
2015-03-04 22:45 ` Dave Chinner
2015-03-04 22:49 ` Eric Sandeen
2015-03-04 22:49 ` Eric Sandeen
2015-03-04 22:56 ` Dave Chinner
2015-03-04 22:56 ` Dave Chinner
2015-03-05 4:08 ` J. Bruce Fields
2015-03-05 4:08 ` J. Bruce Fields
2015-03-05 13:17 ` Christoph Hellwig
2015-03-05 13:17 ` Christoph Hellwig
2015-03-05 15:01 ` J. Bruce Fields
2015-03-05 15:01 ` J. Bruce Fields
2015-03-05 17:02 ` J. Bruce Fields
2015-03-05 17:02 ` J. Bruce Fields
2015-03-05 20:47 ` J. Bruce Fields
2015-03-05 20:47 ` J. Bruce Fields
2015-03-05 20:59 ` Dave Chinner
2015-03-05 20:59 ` Dave Chinner
2015-03-06 20:47 ` J. Bruce Fields
2015-03-06 20:47 ` J. Bruce Fields
2015-03-19 17:27 ` Christoph Hellwig
2015-03-19 17:27 ` Christoph Hellwig
2015-03-19 18:47 ` J. Bruce Fields
2015-03-19 18:47 ` J. Bruce Fields
2015-03-20 6:49 ` Christoph Hellwig
2015-03-20 6:49 ` Christoph Hellwig
2015-03-08 15:30 ` Christoph Hellwig
2015-03-08 15:30 ` Christoph Hellwig
2015-03-09 19:45 ` J. Bruce Fields
2015-03-09 19:45 ` J. Bruce Fields
2015-03-20 4:06 ` Kinglong Mee
2015-03-20 4:06 ` Kinglong Mee
2015-03-20 6:50 ` Christoph Hellwig
2015-03-20 6:50 ` Christoph Hellwig
2015-03-20 7:56 ` [PATCH] NFSD: Fix infinite loop in nfsd4_cb_layout_fail() Kinglong Mee
2015-03-20 7:56 ` Kinglong Mee
2015-03-15 12:58 ` panic on 4.20 server exporting xfs filesystem Christoph Hellwig
2015-03-15 12:58 ` Christoph Hellwig
2015-03-16 14:27 ` J. Bruce Fields
2015-03-16 14:27 ` J. Bruce Fields
2015-03-17 10:30 ` Christoph Hellwig
2015-03-17 10:30 ` Christoph Hellwig
2015-03-18 10:50 ` Christoph Hellwig
2015-03-18 10:50 ` Christoph Hellwig
2015-03-27 10:41 ` Christoph Hellwig
2015-03-27 14:50 ` Jeff Layton
2015-03-30 16:44 ` Christoph Hellwig
2015-03-27 15:13 ` J. Bruce Fields
2015-04-26 16:19 ` Christoph Hellwig
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