linux-kernel - Re: Unionmount and overlayfs testsuite

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Date:	Fri, 30 May 2014 12:35:31 +0900
From:	"J. R. Okajima" <hooanon05g@...il.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Miklos Szeredi <miklos@...redi.hu>, viro@...IV.linux.org.uk,
	torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, hch@...radead.org,
	akpm@...ux-foundation.org, apw@...onical.com, nbd@...nwrt.org,
	neilb@...e.de, jordipujolp@...il.com, ezk@....cs.sunysb.edu,
	sedat.dilek@...il.com, mszeredi@...e.cz
Subject: Re: Unionmount and overlayfs testsuite


David Howells:
> http://git.infradead.org/users/dhowells/unionmount-testsuite.git

I've found some interesting cases.

- impermissible.test,
	open_file_as_bin -t -w $file -E EACCES
  When $termslash is "/", a '/' is appended to the expanded $file, such
  as "/path/fileA/". If fileA is a regular file, that path is obviously
  wrong. Does UnionMount expect EACCES in this case too?
  Should it be ENOTDIR?
  It might be better to change
	errcode=EACCES
	test ! "$termslash" = "" && errcode=ENOTDIR
	open_file_as_bin -t -w $file -E $errcode

- readlink.test,
	fs_op readlink $file -R $testdir/direct_dir_sym100 ${termslash:+-E EINVAL}
  It expects "$testdir/direct_dir_sym100". Does it mean UnionMount
  converts the target path?
  For example,
  - /u = /rw + /ro
  - /rw/symlinkA doesn't exist
  - /ro/symlinkA points to /ro/fileA
  Does readlink(2) return "/u/fileA" instead of "/u/fileA"?

And all tests should be done by a superuser?


J. R. Okajima
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