linux-kernel - Re: Unionmount and overlayfs testsuite

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Date:	Thu, 05 Jun 2014 23:16:00 +0100
From:	David Howells <dhowells@...hat.com>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	dhowells@...hat.com, Sedat Dilek <sedat.dilek@...il.com>,
	"J. R. Okajima" <hooanon05g@...il.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Robo Bot <apw@...onical.com>, Felix Fietkau <nbd@...nwrt.org>,
	Neil Brown <neilb@...e.de>,
	Jordi Pujol <jordipujolp@...il.com>, ezk@....cs.sunysb.edu,
	"mszeredi@...e.cz" <mszeredi@...e.cz>
Subject: Re: Unionmount and overlayfs testsuite

Miklos Szeredi <miklos@...redi.hu> wrote:

> Shell script is the one I'm most familiar with, and that maybe true
> for other kernel developers too.
> 
> Also, it's what xfstests are using and it would make sense to move
> towards that.  Although I'm not sure how well it supports
> multiple-device filesystems.

It was already shell script, but I can do all the layer checking and
automatically fixing up the error prediction for when pathnames have slashes
appended much more easily in something like python where I can build and
maintain a map of the state of the filesystem.

See:

	http://git.infradead.org/users/dhowells/unionmount-testsuite.git/shortlog/refs/heads/switch-to-python

I've also added tests to exercise mkdir and rmdir and have enabled the unlink
tests.  So far so good with overlayfs.

David
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