Hello,
I have a CD that came with Samsung printer that Linux cannot mount but works
fine in Windows. The CD is physically OK - "dd" made ISO image without any
problems. This ISO image is unmountable too. When I force the filesystem to
iso9660, it mounts but no files are visible:
# mount samsung-bad.iso /mnt/tmp -o loop
mount: you must specify the filesystem type
# mount samsung-bad.iso /mnt/tmp -o loop -t iso9660
# ls -la /mnt/tmp
total 6
dr-xr-xr-x 2 root root 2048 Oct 30 2009 .
drwxr-xr-x 15 root root 4096 Sep 26 2006 ..
# df -h /mnt/tmp
Filesystem Size Used Avail Use% Mounted on
/dev/loop0 232M 232M 0 100% /mnt/tmp
dmesg shows this:
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
If anyone can look into this, I can provide a link to the compressed ISO file
(75MB).
--
Ondrej Zary
On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
> I have a CD that came with Samsung printer that Linux cannot mount but works
> fine in Windows. The CD is physically OK - "dd" made ISO image without any
> problems. This ISO image is unmountable too. When I force the filesystem to
> iso9660, it mounts but no files are visible:
Maybe it's a multi-session disk where the first session is
HFS with Apple software. Try mounting with -t iso9660 -o session=1.
HTH
Johannes
On Monday 16 August 2010, Johannes Stezenbach wrote:
> On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
> > I have a CD that came with Samsung printer that Linux cannot mount but
> > works fine in Windows. The CD is physically OK - "dd" made ISO image
> > without any problems. This ISO image is unmountable too. When I force the
> > filesystem to iso9660, it mounts but no files are visible:
>
> Maybe it's a multi-session disk where the first session is
> HFS with Apple software. Try mounting with -t iso9660 -o session=1.
Still the same - no files. dmesg contains:
ISOFS: Invalid session number or type of track
ISOFS: Invalid session number
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
--
Ondrej Zary
On Monday 16 August 2010 16:18:57 Ondrej Zary wrote:
> On Monday 16 August 2010, Johannes Stezenbach wrote:
> > On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
> > > I have a CD that came with Samsung printer that Linux cannot mount but
> > > works fine in Windows. The CD is physically OK - "dd" made ISO image
> > > without any problems. This ISO image is unmountable too. When I force
> > > the filesystem to iso9660, it mounts but no files are visible:
> >
> > Maybe it's a multi-session disk where the first session is
> > HFS with Apple software. Try mounting with -t iso9660 -o session=1.
>
> Still the same - no files. dmesg contains:
>
> ISOFS: Invalid session number or type of track
> ISOFS: Invalid session number
> ISO 9660 Extensions: Microsoft Joliet Level 3
> ISO 9660 Extensions: RRIP_1991A
Here's the compressed ISO file if anyone wants to examine it:
http://www.rainbow-software.org/linux_files/samsung-bad.rar
--
Ondrej Zary
Hi Ondrej
On 08/17/2010 12:50 AM, Ondrej Zary wrote:
> On Monday 16 August 2010 16:18:57 Ondrej Zary wrote:
>> On Monday 16 August 2010, Johannes Stezenbach wrote:
>>> On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
>>>> I have a CD that came with Samsung printer that Linux cannot mount but
>>>> works fine in Windows. The CD is physically OK - "dd" made ISO image
>>>> without any problems. This ISO image is unmountable too. When I force
>>>> the filesystem to iso9660, it mounts but no files are visible:
>>>
>>> Maybe it's a multi-session disk where the first session is
>>> HFS with Apple software. Try mounting with -t iso9660 -o session=1.
>>
>> Still the same - no files. dmesg contains:
>>
>> ISOFS: Invalid session number or type of track
>> ISOFS: Invalid session number
>> ISO 9660 Extensions: Microsoft Joliet Level 3
>> ISO 9660 Extensions: RRIP_1991A
>
> Here's the compressed ISO file if anyone wants to examine it:
> http://www.rainbow-software.org/linux_files/samsung-bad.rar
what is your kernel version? I can mount it successfully in my el5 box
with kernel 2.6.35+.
Regards,
Tao
Ondrej Zary <[email protected]> wrote:
>> > On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
>> > > I have a CD that came with Samsung printer that Linux cannot mount but
>> > > works fine in Windows. The CD is physically OK - "dd" made ISO image
>> > > without any problems. This ISO image is unmountable too. When I force
>> > > the filesystem to iso9660, it mounts but no files are visible:
> Here's the compressed ISO file if anyone wants to examine it:
> http://www.rainbow-software.org/linux_files/samsung-bad.rar
If you use -onorock, the files are visible.
On Tuesday 17 August 2010, Tao Ma wrote:
> Hi Ondrej
>
> On 08/17/2010 12:50 AM, Ondrej Zary wrote:
> > On Monday 16 August 2010 16:18:57 Ondrej Zary wrote:
> >> On Monday 16 August 2010, Johannes Stezenbach wrote:
> >>> On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
> >>>> I have a CD that came with Samsung printer that Linux cannot mount but
> >>>> works fine in Windows. The CD is physically OK - "dd" made ISO image
> >>>> without any problems. This ISO image is unmountable too. When I force
> >>>> the filesystem to iso9660, it mounts but no files are visible:
> >>>
> >>> Maybe it's a multi-session disk where the first session is
> >>> HFS with Apple software. Try mounting with -t iso9660 -o session=1.
> >>
> >> Still the same - no files. dmesg contains:
> >>
> >> ISOFS: Invalid session number or type of track
> >> ISOFS: Invalid session number
> >> ISO 9660 Extensions: Microsoft Joliet Level 3
> >> ISO 9660 Extensions: RRIP_1991A
> >
> > Here's the compressed ISO file if anyone wants to examine it:
> > http://www.rainbow-software.org/linux_files/samsung-bad.rar
>
> what is your kernel version? I can mount it successfully in my el5 box
> with kernel 2.6.35+.
I have 2.6.35. Also tried it on another two machines with Debian Squeeze
2.6.32 and Lenny 2.6.26 with the same result (no files visible when mounted).
--
Ondrej Zary
On Tuesday 17 August 2010 13:50:39 A. C. Censi wrote:
> On Tue, Aug 17, 2010 at 7:08 AM, Ondrej Zary <[email protected]>
wrote:
> > On Tuesday 17 August 2010, Tao Ma wrote:
> >> Hi Ondrej
> >>
> >> On 08/17/2010 12:50 AM, Ondrej Zary wrote:
> >> > On Monday 16 August 2010 16:18:57 Ondrej Zary wrote:
> >> >> On Monday 16 August 2010, Johannes Stezenbach wrote:
> >> >>> On Mon, Aug 16, 2010 at 02:38:54PM +0200, Ondrej Zary wrote:
> >> >>>> I have a CD that came with Samsung printer that Linux cannot mount
> >> >>>> but works fine in Windows. The CD is physically OK - "dd" made ISO
> >> >>>> image without any problems. This ISO image is unmountable too. When
> >> >>>> I force the filesystem to iso9660, it mounts but no files are
> >> >>>> visible:
> >> >>>
> >> >>> Maybe it's a multi-session disk where the first session is
> >> >>> HFS with Apple software. ?Try mounting with -t iso9660 -o session=1.
> >> >>
> >> >> Still the same - no files. dmesg contains:
> >> >>
> >> >> ISOFS: Invalid session number or type of track
> >> >> ISOFS: Invalid session number
> >> >> ISO 9660 Extensions: Microsoft Joliet Level 3
> >> >> ISO 9660 Extensions: RRIP_1991A
> >> >
> >> > Here's the compressed ISO file if anyone wants to examine it:
> >> > http://www.rainbow-software.org/linux_files/samsung-bad.rar
> >>
> >> what is your kernel version? I can mount it successfully in my el5 box
> >> with kernel 2.6.35+.
> >
> > I have 2.6.35. Also tried it on another two machines with Debian Squeeze
> > 2.6.32 and Lenny 2.6.26 with the same result (no files visible when
> > mounted).
> >
> >
> > --
> > Ondrej Zary
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel"
> > in the body of a message to [email protected]
> > More majordomo info at ?http://vger.kernel.org/majordomo-info.html
>
> Try -unide mount option.
>
> If it does not work, try what is described in the last posts of this
> thread: http://www.pubbs.net/200910/kernel/12764-iso9660-mount-problem.html
Thanks. As Bodo Eggert said, "-o norock" helps.
In fact, I've hit two "bugs":
1. blkid is unable to recognize HFS+ISO9660 CD. Just tracked it down and fixed
only to find that it was aleady fixed:
http://git.kernel.org/?p=utils/util-linux-ng/util-linux-ng.git;a=commitdiff;h=791a2fd67c118c3f07141e4cc95532fe908015a9
2. some kernel feature - when Rock Ridge is present on iso9660, it's preferred
over Joliet. The CD contains both but seems that only Joliet has files
inside? When it's mounted with "-o nojoliet,norock", it's empty too. Can we
detect this case and avoid it somehow (switch to Joliet?)
--
Ondrej Zary
If a CD has both Rock Ridge and Joliet extensions and the ISO root directory
is empty, no files are visible. Disable Rock Ridge extensions in this case and
use Joliet root directory instead.
Signed-off-by: Ondrej Zary <[email protected]>
--- linux-2.6.35-rc2/fs/isofs/inode.c 2010-06-06 05:43:24.000000000 +0200
+++ linux-2.6.35-rc3/fs/isofs/inode.c 2010-08-24 22:43:26.000000000 +0200
@@ -549,6 +549,34 @@ static unsigned int isofs_get_last_sessi
}
/*
+ * Check if root directory is empty (has less than 3 files).
+ *
+ * Used to detect broken CDs where ISO root directory is empty but Joliet root
+ * directory is OK. If such CD has Rock Ridge extensions, they will be disabled
+ * (and Joliet used instead) or else no files would be visible.
+ */
+static bool rootdir_empty(struct super_block *sb, unsigned long block)
+{
+ int offset, files, de_len;
+ struct iso_directory_record *de;
+ struct buffer_head *bh;
+
+ bh = sb_bread(sb, block);
+ if (!bh)
+ return true;
+ while (files < 3) {
+ de = (struct iso_directory_record *) (bh->b_data + offset);
+ de_len = *(unsigned char *) de;
+ if (de_len == 0)
+ break;
+ files++;
+ offset += de_len;
+ }
+ brelse(bh);
+ return files < 3;
+}
+
+/*
* Initialize the superblock and read the root inode.
*
* Note: a check_disk_change() has been done immediately prior
@@ -842,6 +870,18 @@ root_found:
goto out_no_root;
/*
+ * Fix for broken CDs with Rock Ridge and empty ISO root directory but
+ * correct Joliet root directory.
+ */
+ if (sbi->s_rock == 1 && joliet_level &&
+ rootdir_empty(s, sbi->s_firstdatazone)) {
+ printk(KERN_NOTICE
+ "ISOFS: primary root directory is empty. "
+ "Disabling Rock Ridge and switching to Joliet.");
+ sbi->s_rock = 0;
+ }
+
+ /*
* If this disk has both Rock Ridge and Joliet on it, then we
* want to use Rock Ridge by default. This can be overridden
* by using the norock mount option. There is still one other
--
Ondrej Zary