linux-kernel - Re: xfs mknod regression

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Message-Id: <200712200104.50252.rjw@sisk.pl>
Date:	Thu, 20 Dec 2007 01:04:49 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	David Chinner <dgc@....com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Bret Towe <magnade@...il.com>, linux-kernel@...r.kernel.org,
	xfs@....sgi.com
Subject: Re: xfs mknod regression

On Wednesday, 19 of December 2007, David Chinner wrote:
> On Tue, Dec 18, 2007 at 05:36:42PM +0000, Christoph Hellwig wrote:
> > 
> > This was broken by my '[XFS] simplify xfs_create/mknod/symlink prototype',
> > which assigned the re-shuffled ondisk dev_t back to the rdev variable in
> > xfs_vn_mknod.  Because of that i_rdev is set to the ondisk dev_t instead
> > of the linux dev_t later down the function.
> > 
> > Fortunately the fix for it is trivial:  we can just remove the
> > assignment because xfs_revalidate_inode has done the proper job before
> > unlocking the inode.
> > 
> > 
> > Signed-off-by: Christoph Hellwig <hch@....de>
> > 
> > Index: linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.c
> > ===================================================================
> > --- linux-2.6-xfs.orig/fs/xfs/linux-2.6/xfs_iops.c	2007-12-18 18:23:32.000000000 +0100
> > +++ linux-2.6-xfs/fs/xfs/linux-2.6/xfs_iops.c	2007-12-18 18:23:43.000000000 +0100
> > @@ -345,9 +345,7 @@ xfs_vn_mknod(
> >  		ASSERT(vp);
> >  		ip = vn_to_inode(vp);
> >  
> > -		if (S_ISCHR(mode) || S_ISBLK(mode))
> > -			ip->i_rdev = rdev;
> > -		else if (S_ISDIR(mode))
> > +		if (S_ISDIR(mode))
> >  			xfs_validate_fields(ip);
> >  		d_instantiate(dentry, ip);
> >  		xfs_validate_fields(dir);
> 
> Thanks for this, Christoph - I'll run some tests on it and check it in.
> 
> Rafael - this is a regression introduced in 2.6.24-rc1 if you want to
> track it.

I do, thanks.

Added to the list, http://bugzilla.kernel.org/show_bug.cgi?id=9608 .
I'll close it when the fix is upstream.

Thanks,
Rafael
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