linux-kernel - Re: [patch 4/8] fs, exportfs: Add export_encode_inode

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Message-ID: <20120816131632.GN32081@moon>
Date:	Thu, 16 Aug 2012 17:16:32 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	James Bottomley <jbottomley@...allels.com>,
	Matthew Helsley <matt.helsley@...il.com>
Subject: Re: [patch 4/8] fs, exportfs: Add export_encode_inode_fh helper

On Thu, Aug 16, 2012 at 08:47:03AM -0400, J. Bruce Fields wrote:
> > Hi Bruce, thinking a bit more I guess using general encode_fh is not that
> > convenient since it operates with dentries while our fdinfo output deals
> > with inodes. Thus I should either provide some new encode_fh variant
> > which would deal with inodes directly without "parents".
> 
> I can't see why that wouldn't work.
> 
> > Which doesn't
> > look for me anyhow better than the new export_encode_inode_fh helper.
> 
> That isn't going to work for filesystems that define their own
> encode_fh:
> 
> 	$ git grep '\.encode_fh'
> 	fs/btrfs/export.c:      .encode_fh      = btrfs_encode_fh,
> 	fs/ceph/export.c:       .encode_fh = ceph_encode_fh,
	...

Agreed. I'll try to cook something.
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