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Re: [PATCH] xfs_copy: accept XFS_ABTB_CRC_MAGIC

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH] xfs_copy: accept XFS_ABTB_CRC_MAGIC
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Wed, 26 Feb 2014 17:02:26 +1100
Cc: Eric Sandeen <sandeen@xxxxxxxxxx>, xfs-oss <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20140226020737.GA21877@xxxxxxxxxxxxx>
References: <530D4B68.9090905@xxxxxxxxxx> <20140226020737.GA21877@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Tue, Feb 25, 2014 at 06:07:37PM -0800, Christoph Hellwig wrote:
> On Tue, Feb 25, 2014 at 08:03:20PM -0600, Eric Sandeen wrote:
> > xfs_copy needs a fair bit of work for CRCs because it rewrites
> > UUIDs by default, but this change will get it working properly
> > with the "-d" (duplicate) option which keeps the same UUID.
> I don't think ASSERTs for user supplied data are a good idea, this
> should be some real error handling.
> > However, I wonder if we should fail CRC filesystems outright
> > for now if -d isn't specified, because it will invalidate every
> > CRC and generally make a mess of things...
> Yeah, for now it probably should be rejected.
> It would also be useful to have a list of such issues in an README.v5
> or TODO.v5 file in the xfsprogs tree.

Well, I thought we had just about got everything except for the
remaining repair cleanups and the logprint failure in xfs/295 up
until Eric mentioned UUIDs and xfs_copy/xfs_admin yesterday on IIRC.
I can't think of anything else that is needs to be finished for a
userspace release - I think that covers all the remaining xfstests
failures I'm seeing on crc enabled filesystems....


Dave Chinner

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