DSM-G600, DNS-3xx and NSA-220 Hack Forum

Excellent; the isofs and udf modules from here http://dev.skcserver.de/dns323/modules_v1.03/kernel/fs/ will add iso9660 and udf filesystem support (should be fine for 1.03 and 1.04 firmware; I'm testing on 1.04).

Just download them and then use the following:

insmod isofs.ko

Recheck /proc/filesystems and you'll see the missing filesystem supported; then your mount command will succeed.

-Jeff

BTW I'm experimenting with this a bit; if you want to handle DVDs with a bridged udf/iso9660 filesystem as udf then the order of loading of modules matters because mount will use the order in /proc/filesystems to determine the order for detecting auto (this seems easier than bothering with setting up an ordered /etc/filesystems file instead)...

So:

     insmod udf.ko
     insmod isofs.ko
     mount -o loop dvd.iso /mnt/dvd

Specifically don't use the -t option; so auto detect takes place (udf preferred first followed by iso9660).

You can also increase the number of loop devices from 6 to 8 with (beyond 8 didn't work; since loop isn't loaded as a separate module I don't know if there's any way on this device to reconfigure without a custom firmware):

     for NUM in $(seq 6 7); do mknod /dev/loop$NUM b 7 $NUM; done

-Jeff

Hi,

I've successfully build udf.ko and isofs.ko from linux 2.6.12.6 using the wiki cross-compile how-to, but the result is not what I expected..

I'm able to mount a simple ISO like trinux-iso distrib (small 19MB iso), but behaviour is erratic.. :

/mnt/HD_a2 # mount -o loop trinux-0.890.iso iso 
/mnt/HD_a2 # cd iso/
/mnt/HD_a2/iso # ls
isolinux  trinux
/mnt/HD_a2/iso # cd trinux/
/mnt/HD_a2/iso/trinux # ls
README   bootpkg  kpkg     modules  pkg      tux
/mnt/HD_a2/iso/trinux # cp README ../../tmp/

/mnt/HD_a2 # mount          
rootfs on / type rootfs (rw)
/dev/root on / type ext2 (rw)
proc on /proc type proc (rw,nodiratime)
/dev/loop0 on /sys/crfs type squashfs (ro)
/dev/sda2 on /mnt/HD_a2 type ext2 (rw)
/dev/sdb3 on /mnt/HD_b3 type ext3 (rw)
/dev/sda4 on /mnt/HD_a4 type ext2 (rw)
none on /proc/bus/usb type usbfs (rw)
devpts on /dev/pts type devpts (rw)
/dev/sda2 on /opt type ext2 (rw)
/dev/loop1 on /mnt/HD_a2/iso type iso9660 (ro)
/mnt/HD_a2 # umount /dev/loop1 
Segmentation fault

From there, a new telnet session will hang and wont let me prompt in,  I cannot even cleanly reboot my DNS323 : reboot hang also..

Has anyone compiled the kernel modules isofs and udf versions 2.6.12.6 and have more success than I do ?
Anyone is having more success with mounting ISOs with a 1.05 fw DNS323 ?

Hi Jeff,

Thanks for helping.
I've tried replacing my own compiled module with the ones from your link, but it results in a Segmentation Fault on the first mount :

/mnt/HD_a2/bin # insmod udf.ko
/mnt/HD_a2/bin # insmod isofs.ko
/mnt/HD_a2/bin # cd ..
/mnt/HD_a2 # mount -o loop trinux-0.890.iso iso/
Segmentation fault

Here is my dmesg output, it seems a request for a '1064' byte buffer is causing the error as it's not a multiple of 512.. ?!

getblk(): invalid block size 1064 requested
hardsect size: 512
Unable to handle kernel NULL pointer dereference at virtual address 00000000
../.. Stack Dump follows

btw, i just realized my DNS323 runs the 1.06 fw not the 1.05, if it matters..

I'll try to fetch the latest versions I can found for theese fs and try another compile..
Any other idea ?


-Alex

Well; I'm using 1.06 now and can reproduce the failures you guys are reporting. Interesting apparently those modules aren't working with kernel now even though it is listed as the same version (and the usb-storage module still works fine).

-Jeff

Thanks jdoering.
These new modules also work with the CH3SNAS v1.05. Finally I can mount UDF ISOs!

Be forwarned about testing, at your own risk, etc... I've posted a copy in the original thread on the topic: http://dns323.kood.org/forum/viewtopic. … 039#p30039 (somehow I thought I'd already uploaded one back then but I didn't find it searching; maybe I never got around to it because I hadn't finished testing and got sidetracked with other DNS-323 stuff like ALSA).

-Jeff

Is anybody interested in isofs.ko and udf.ko modules for the DNS-321 release 1.03?

I noticed that the modules are available for various DNS-323 versions, but the lowly '321 seems to have been ignored.

Version 1.03 is the latest software release for the '321 and runs a 2.6.22.18 kernel. These modules work for me, but I have no convenient and stable web site to share them.

I downloaded the source and gen'ed up my own modules. If others are interested, I can give a step-by-step process to make your own if you have several gig of free space on a recent x86 Linux system.  I used an Ubuntu 10.4 laptop that I had already configured for development.  There might be programs required to build that I happened to have installed, so don't try it unless you are at least somewhat familiar with finding and installing programs for your flavor of Linux.

As an added bonus, the download includes a ready-to-go cross compiler chain running on Linux, so you can work on porting your favorite apps that you feel are missing.

I'd like to know how to recompile the usb source.  I down loaded the GPL and did
a build.  It built the kernel but does not build any of the drivers.  I tried to do a
source drivers/usb/Kconfig.  It failed.  Any help would be appreciated.

RAC