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

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Message-ID: <502CFB61.5040804@parallels.com>
Date:	Thu, 16 Aug 2012 17:53:37 +0400
From:	Pavel Emelyanov <xemul@...allels.com>
To:	Al Viro <viro@...IV.linux.org.uk>
CC:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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 08/16/2012 05:50 PM, Al Viro wrote:
> On Thu, Aug 16, 2012 at 05:47:06PM +0400, Pavel Emelyanov wrote:
>> On 08/16/2012 05:43 PM, Al Viro wrote:
>>> On Thu, Aug 16, 2012 at 04:38:14PM +0400, Cyrill Gorcunov 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". Which doesn't
>>>> look for me anyhow better than the new export_encode_inode_fh helper.
>>>
>>> Huh?  You do have dentries, for crying out loud...
>>
>> Sometimes we don't -- the inotify thing gets an inode only.
>> Unlike other notifies that have dentries at hands...
> 
> What's wrong with saying "we don't support idiotify"?

Lot's of exiting software uses them and we cannot say something like "we cannot
migrate a container with Apache running inside" :(

> .

Thanks,
Pavel
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