hi,
I have met a permission problem for directory in aufs, below is my command
line output:
=========================================
[wuhp@test002 /]$ ll /tmp/aufs/
total 20
drwxr-xr-x 5 wuhp wuhp 4096 2013-01-06 02:35 ./
drwxrwxrwt 5 root root 4096 2013-01-06 01:54 ../
drwxr-xr-x 2 wuhp wuhp 4096 2013-01-06 01:55 mnt/
drwxr-xr-x 3 root root 4096 2013-01-06 02:36 root/
drwxr-xr-x 2 wuhp wuhp 4096 2013-01-06 02:35 temp/
[wuhp@test002 /]$ ll /tmp/aufs/root
total 12
drwxr-xr-x 3 root root 4096 2013-01-06 02:36 ./
drwxr-xr-x 5 wuhp wuhp 4096 2013-01-06 02:35 ../
drwx------ 2 root root 4096 2013-01-06 02:08 test2/
[wuhp@test002 /]$ sudo mount -t aufs -o
br:/tmp/aufs/temp=rw:/tmp/aufs/root=ro+wh none /tmp/aufs/mnt
[wuhp@test002 /]$ stat /tmp/aufs/mnt/test2
File: `/tmp/aufs/mnt/test2'
Size: 4096 Blocks: 8 IO Block: 4096 directory
Device: 2bh/43d Inode: 11 Links: 2
Access: (0700/drwx------) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2013-01-06 02:08:19.813238591 -0700
Modify: 2013-01-06 02:08:19.813238591 -0700
Change: 2013-01-06 02:27:29.313239019 -0700
[wuhp@test002 /]$ touch /tmp/aufs/mnt/test2/a
touch: cannot touch `/tmp/aufs/mnt/test2/a': Permission denied
[wuhp@test002 /]$ sudo chmod 777 /tmp/aufs/mnt/test2
[wuhp@test002 /]$ stat /tmp/aufs/mnt/test2
File: `/tmp/aufs/mnt/test2'
Size: 4096 Blocks: 8 IO Block: 4096 directory
Device: 2bh/43d Inode: 11 Links: 2
Access: (0777/drwxrwxrwx) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2013-01-06 02:08:19.813238591 -0700
Modify: 2013-01-06 02:08:19.813238591 -0700
Change: 2013-01-06 02:39:19.423239284 -0700
[wuhp@test002 /]$ touch /tmp/aufs/mnt/test2/a
touch: cannot touch `/tmp/aufs/mnt/test2/a': Permission denied
=========================================
I can't create file even if I have write permission to
"/tmp/aufs/mnt/test2", can anyone tell me why and how to fix it?
Here is my workstation info:
-------
[wuhp@test002 /]$ cat /sys/module/aufs/version
2.1-standalone.tree-38-rcN-20110207
[wuhp@test002 /]$ uname -a
Linux test002 2.6.38-16-generic #67~lucid1-Ubuntu SMP Fri Sep 7 18:18:45 UTC
2012 x86_64 GNU/Linux
-------
More findings, if /tmp/aufs/root/test has execute permission, the workflow
above works, strange behavior.
=========================================
[wuhp@test002 /]$ sudo chmod 711 /tmp/aufs/root/test2
[wuhp@test002 /]$ stat /tmp/aufs/root/test2
File: `/tmp/aufs/root/test2'
Size: 4096 Blocks: 8 IO Block: 4096 directory
Device: 801h/2049d Inode: 142665 Links: 2
Access: (0711/drwx--x--x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2013-01-06 02:08:19.813238591 -0700
Modify: 2013-01-06 02:08:19.813238591 -0700
Change: 2013-01-06 02:43:47.463239384 -0700
[wuhp@test002 /]$ touch /tmp/aufs/mnt/test2/a
[wuhp@test002 /]$ stat /tmp/aufs/temp/test2/a
File: `/tmp/aufs/temp/test2/a'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
Device: 801h/2049d Inode: 142669 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ wuhp) Gid: ( 1000/ wuhp)
Access: 2013-01-06 02:44:12.613239392 -0700
Modify: 2013-01-06 02:44:12.613239392 -0700
Change: 2013-01-06 02:44:12.613239392 -0700
=========================================
thanks,
haipeng
------------------------------------------------------------------------------
Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
MVPs and experts. ON SALE this month only -- learn more at:
http://p.sf.net/sfu/learnmore_123012
