On Mon, 10 Oct 2005, Klaus Knopper wrote:
> > Thanx, now I better understand. I am willing to test anything but as far as
> > I can see unionfs-20050929-0844 + Junjiro's patch is doing just what I want.
> > And the security bug seems to be solved.
>
> Cool. Well, hopefully Junjiro's patches make it into the next snapshot
> as well. :-)
Oh there is still yet a little problem in inode.c (20050929-0844) with
Junjiro's patch:
#########################################################################
+ insmod /l/src/t2/unionfs-20050929-0844/unionfs.ko
+ dmesg
+ grep 'Registering unionfs'
+ tail -1
Registering unionfs 20050929-0844
+ mount -o ro 132.230.1.13:/q /a
+ ssh 132.230.1.13 grep /q /etc/exports /proc/mounts
/etc/exports:/q 0.0.0.0/0.0.0.0(ro,no_root_squash,async)
/proc/mounts:/dev/hda2 /q reiserfs rw 0 0
+ mount -t tmpfs -o mode=755 none /diff
+ chmod 755 /diff
+ mount -t unionfs -o dirs=/diff=rw:/a=ro none /b
+ touch /b/x1
<------- OK
+ su mawa -c 'id; touch /b/x2'
uid=1003(mawa) gid=1000 groups=1000
touch: cannot touch `/b/x2': Permission denied
<------- OK
+ find /a /diff /b -ls
2 0 drwxr-xr-x 5 root root 104 Oct 10 15:31 /a
4 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /a/1
79135 0 drwxr-xr-x 2 root root 60 Oct 10 15:32 /diff
79154 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /diff/x1
1805 0 drwxr-xr-x 5 root root 60 Oct 10 15:32 /b
1806 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /b/x1
1807 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /b/1
+ touch /b/1/x1
<------- SHOULD SUCCEED!
touch: cannot touch `/b/1/x1': Permission denied
<------- NOT OK
+ find /a /diff /b -ls
2 0 drwxr-xr-x 5 root root 104 Oct 10 15:31 /a
4 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /a/1
79135 0 drwxr-xr-x 2 root root 60 Oct 10 15:32 /diff
79154 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /diff/x1
1805 0 drwxr-xr-x 5 root root 60 Oct 10 15:32 /b
1806 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /b/x1
1807 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /b/1
+ touch /b/1
<------- OK
+ find /a /diff /b -ls
2 0 drwxr-xr-x 5 root root 104 Oct 10 15:31 /a
4 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /a/1
79135 0 drwxr-xr-x 3 root root 80 Oct 10 15:32 /diff
79202 0 drwxr-xr-x 2 root root 40 Oct 10 15:32 /diff/1
<------- now subdir 1 exists in upper layer
79154 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /diff/x1
1805 0 drwxr-xr-x 5 root root 60 Oct 10 15:32 /b
1807 0 drwxr-xr-x 2 root root 40 Oct 10 15:32 /b/1
1806 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /b/x1
+ touch /b/1/x1
<------- OK
+ find /a /diff /b -ls
2 0 drwxr-xr-x 5 root root 104 Oct 10 15:31 /a
4 0 drwxr-xr-x 2 root root 48 Oct 10 15:31 /a/1
79135 0 drwxr-xr-x 3 root root 80 Oct 10 15:32 /diff
79202 0 drwxr-xr-x 2 root root 60 Oct 10 15:32 /diff/1
79215 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /diff/1/x1
79154 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /diff/x1
1805 0 drwxr-xr-x 6 root root 80 Oct 10 15:32 /b
1807 0 drwxr-xr-x 2 root root 60 Oct 10 15:32 /b/1
1808 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /b/1/x1
1806 0 -rw-r--r-- 1 root root 0 Oct 10 15:32 /b/x1
#########################################################################
Regards,
Martin
--
Martin Walter
University of Freiburg i.Br. --- Germany --- Fon/Fax: +49 761 203-4651/-4643
Rechenzentrum der Universitaet, Hermann-Herder-Str.10, D-79104 Freiburg i.Br.
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