linux-kernel - Re: [RFC PATCH 0/2] Union Mount: Directory listing in glibc

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Date:	Wed, 30 Apr 2008 00:21:09 +0900
From:	hooanon05@...oo.co.jp
To:	bsn.0007@...il.com
Cc:	libc-alpha@...rceware.org, Jan Blunck <jblunck@...e.de>,
	Erez Zadok <ezk@...sunysb.edu>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	Christoph Hellwig <hch@....de>,
	Ulrich Drepper <drepper@...hat.com>,
	Mingming Cao <cmm@...ibm.com>,
	Dave Hansen <haveblue@...ibm.com>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	bharata@...ux.vnet.ibm.com, David Woodhouse <dwmw2@...radead.org>
Subject: Re: [RFC PATCH 0/2] Union Mount: Directory listing in glibc 


Hello Nagabhushan,

bsn.0007@...il.com:
> I went through Bharata's RFC post on glibc based Union Mount readdir solution
> (http://lkml.org/lkml/2008/3/11/34) and have come up with patches
> against glibc to implement the same.
	:::

While I don't have objection against the implementation in userspace,
what will UnionMount handle about rmdir or rename dir?
Those systemcalls need to test whether the dir is *logically* empty or
not in kernel space, don't they?
And I am afraid that UnionMount has to implement the similar thing, but
it never mean to modify glibc is a bad idea.


Junjiro Okajima
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