linux-kernel - Re: [PATCH 1/2] vfs: export symbol 'getname' and 'putname'

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Date:	Wed, 22 Apr 2015 06:49:08 +0000
From:	"Drokin, Oleg" <oleg.drokin@...el.com>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Boqun Feng <boqun.feng@...il.com>,
	"<linux-fsdevel@...r.kernel.org>" <linux-fsdevel@...r.kernel.org>,
	"<devel@...verdev.osuosl.org>" <devel@...verdev.osuosl.org>,
	"<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	"Dilger, Andreas" <andreas.dilger@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 1/2] vfs: export symbol 'getname' and 'putname'

On Apr 22, 2015, at 2:31 AM, Christoph Hellwig wrote:

> On Wed, Apr 22, 2015 at 06:27:11AM +0000, Drokin, Oleg wrote:
>>> Nak on exporting symbols for broken staging code.  Please get rid of
>>> the ioctls looking up path names in horrible ways in the lustre code.
>> 
>> For a reference, is there a good example of a non-horrible way to look up a pathname?
> 
> Just dont do it from an ioctl, it's got an fd parameter for a reason.

I know this is not going to be a popular opinion with you, but sometimes opening a file
is just too expensive. 1 RPC roudntrip to open a file and then another one to close it.

Also some files could not be opened (fs corruption).

Anyway, I got your point and there will be a solution. I was just hoping there was a way
to do it because what if e.g. I need to create something new, not do something with already
existing stuff, certainly there's no way to get an fd from a not yet existing fs object.

Bye,
    Oleg--
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