[OpenIndiana-discuss] ZFS normalization problem

[Ichiko Sakamoto]

Hi All,

Problem:
 We can create invisible file in ZFS.

How to reproduce:
0. Prepare normalization formD ZFS.

	# cat cat /etc/release
	cat: cat: No such file or directory
	             OpenIndiana Development oi_151 X86 (powered by illumos)
	        Copyright 2011 Oracle and/or its affiliates. All rights reserved.
	                        Use is subject to license terms.
	                           Assembled 28 April 2011
	# mkfile 100M 100M
	# zpool create -O utf8only=on -O normalization=formD test_pool $( pwd )/100M
	# zpool upgrade
	This system is currently running ZFS pool version 28.

	All pools are formatted using this version.
	# zfs get normalization test_pool
	NAME       PROPERTY       VALUE          SOURCE
	test_pool  normalization  formD          -
	# chmod 777 /test_pool

1. Create a NFD file.

	$ cd /test_pool/
	$ cp /etc/release $( echo "\x75\xcc\x88" )
	$ ls -la
	total 4
	drwxrwxrwx  2 root  root    3 2011-07-29 08:53 .
	drwxr-xr-x 25 root  root   26 2011-07-29 08:53 ..
	-r--r--r--  1 test1 staff 251 2011-07-29 08:53 u?
	$

2. Unlink NFC name of the file.

	$ rm -fv $( echo "\xc3\xbc" )
	removed `u'

3. The file is invisible but can be accessed with NFD name.

	$ ls -la
	total 3
	drwxrwxrwx  2 root root  2 2011-07-29 08:54 .
	drwxr-xr-x 25 root root 26 2011-07-29 08:53 ..
	$
	$ cat $( echo "\x75\xcc\x88" )
	             OpenIndiana Development oi_151 X86 (powered by illumos)
	        Copyright 2011 Oracle and/or its affiliates. All rights reserved.
	                        Use is subject to license terms.
	                           Assembled 28 April 2011
	$ stat $( echo "\x75\xcc\x88" )
	  File: `u?'
	  Size: 251             Blocks: 2          IO Block: 512    regular file
	Device: 2d9000ah/47775754d      Inode: 8           Links: 0
	Access: (0444/-r--r--r--)  Uid: (  101/   test1)   Gid: (   10/   staff)
	Access: 2011-07-29 08:54:28.964231657 +0900
	Modify: 2011-07-29 08:53:58.437886638 +0900
	Change: 2011-07-29 08:53:58.437886638 +0900

 nlink == 0. but we can open this file with NFD name.

sol11 ex 2010.11 has the same issue.
http://www.opensolaris.org/jive/thread.jspa?messageID=521695



Thanks.

Ichiko Sakamoto