gadgetfs does not mount

[Ramanathan-R]

1. Upgraded Debian wheezy to jessie on a BBB.
2. Built USBProxy from source following instructions. Only "liborcon" was not installed. But "usb-mitm" was still built.
3. Ran "usb-mitm" which created a temporary directory as "/tmp/gadget-xxx". But mounting this as gadgetfs fails.
4. "lsmod" shows "gadgetfs".
5. Running "mount -t gadgetfs none /tmp/gadget-VKuV7c" gives output "mount: unknown filesystem type 'gadgetfs'"
6. Scratch head, do some Googling and still no solution :-)

Any ideas/suggestions/pointers/links etc. ?

[marcosox]

What error message does usb-mitm return on step 3?
Also, you must run usb-mitm as root / with sudo

[Ramanathan-R]

root@beaglebone:~# lsmod
Module Size Used by
g_multi 50407 0
libcomposite 15028 1 g_multi
omap_rng 4062 0
nfsd 187513 2
mt7601Usta 639170 0

root@beaglebone:~# usb-mitm -l
Loading plugins from /usr/local/lib/USBProxy/
vendorId=ffffffff
productId=ffffffff
cleaning up /tmp
removing 0
Made directory /tmp/gadget-iNvIJk for gadget
Error mounting gadgetfs from [/tmp/gadget-iNvIJk].
Error code from mount is: [No such device]
Printing Config data
Strings: 2
DeviceProxy: DeviceProxy_LibUSB
HostProxy: HostProxy_GadgetFS
Vectors: 1
Plugins:
PacketFilter_StreamLog
Pointer: 1
PacketFilter_StreamLog::file: 0xb6d239f0
Unable to connect to device proxy.
done

root@beaglebone:~# lsmod
Module Size Used by
gadgetfs 12527 0
g_multi 50407 0
libcomposite 15028 1 g_multi
omap_rng 4062 0
nfsd 187513 2
mt7601Usta 639170 0

root@beaglebone:~# ls -al /tmp
total 44
drwxrwxrwt 10 root root 4096 Dec 3 15:19 .
drwxr-xr-x 21 root root 4096 Dec 3 06:18 ..
drwxrwxrwt 2 root root 4096 May 21 2016 .ICE-unix
drwxrwxrwt 2 root root 4096 May 21 2016 .Test-unix
-r--r--r-- 1 root root 11 Dec 3 14:45 .X0-lock
drwxrwxrwt 2 root root 4096 Dec 3 14:45 .X11-unix
drwxrwxrwt 2 root root 4096 May 21 2016 .XIM-unix
drwxrwxrwt 2 root root 4096 May 21 2016 .font-unix
drwxrwxrwt 4 xrdp xrdp 4096 Dec 3 14:45 .xrdp
drwx------ 2 root root 4096 Dec 3 15:19 gadget-iNvIJk
...

root@beaglebone:~# mount -t gadgetfs none /tmp/gadget-iNvIJk
mount: unknown filesystem type 'gadgetfs'

[Ramanathan-R]

Closed by mistake in my last comment. Issue still open.

[marcosox]

rmmod the modules g_multi and libcomposite as they prevent the USB host port from being used by the software.

[Ramanathan-R]

Thank you, that did it. "usb-mitm" loads properly now.

Time to read up some more on the USB details :-)