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
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