next-2008-11-28 : can't mount UDF DVD

Laurent Riffard
2008-11-30T23:44:09Z

Hi,

With next-2008-11-28, I was unable to mount an UDF-formatted DVD-RW:

~$ mount -oro -t udf /dev/sr0 /media/cdrom/
mount: Not a directory

There was no problem with 2.6.28-rc6.

I made a bisection:

33284bdf40f88160a154202510b27d983138c805 is first bad commit
commit 33284bdf40f88160a154202510b27d983138c805
Author: Marcin Slusarz <marcin.slusarz@gmail.com>
Date: Sun Nov 16 20:52:19 2008 +0100

udf: implement mode and dmode mounting options

"dmode" allows overriding permissions of directories and
"mode" allows overriding permissions of files.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>

Indeed, with this commit, I *must* use the dmode option to mount my DVD:

~$ sudo mount -oro,dmode=0755 -t udf /dev/sr0 /media/cdrom/
~$ grep /media/cdrom /proc/mounts
/dev/scd0 /media/cdrom udf ro,mode=177777,dmode=755,utf8 0 0
~$ ls -la /media/cdrom/
total 46
drwxr-xr-x 5 root root 344 Dec 24 2007 .
drwxr-xr-x 12 root root 4096 Dec 1 00:17 ..
drwxr-xr-x 2 laurent laurent 7112 Nov 30 20:14 flexbackup
drwxr-xr-x 2 root root 40 Nov 20 2005 lost+found
drwxr-xr-x 10 laurent laurent 4548 Nov 25 2005 patches
~$ ls -la /media/cdrom/flexbackup/
total 4307946
drwxr-xr-x 2 laurent laurent 7112 Nov 30 20:14 .
drwxr-xr-x 5 root root 344 Dec 24 2007 ..
?rwsrwsrwt 1 laurent laurent 44 Oct 1 2006 00-index-key
...

Althought I was able to mount it with no special option on 2.6.28-rc6:

~$ sudo mount -oro -t udf /dev/sr0 /media/cdrom/
~$ grep /media/cdrom /proc/mounts
/dev/scd0 /media/cdrom udf ro,utf8 0 0
~$ ls -la /media/cdrom/
total 46
drwxrwxrwx 5 root root 344 2007-12-24 18:09 .
drwxr-xr-x 12 root root 4096 2008-12-01 00:22 ..
drwxr-x--- 2 laurent laurent 7112 2008-11-30 20:14 flexbackup
drwxr-xr-x 2 root root 40 2005-11-20 23:37 lost+found
drwxr-x--- 10 laurent laurent 4548 2005-11-25 18:18 patches
~$ ls -la /media/cdrom/flexbackup/
total 4307946
drwxr-x--- 2 laurent laurent 7112 2008-11-30 20:14 .
drwxrwxrwx 5 root root 344 2007-12-24 18:09 ..
-rw-r----- 1 laurent laurent 44 2006-10-01 15:36 00-index-key
...

~~
laurent