java.lang.NullPointerException # README for usbip-utils
java.lang.NullPointerException # Copyright (C) 2011 matt mooney <mfm@muteddisk.com> # 2005-2008 Takahiro Hirofuchi
[Overview]
USB/IP protocol allows to pass USB device from server to client over the
network. Server is a machine which provides (shares) a USB device. Client is
a machine which uses USB device provided by server over the network.
The USB device may be either physical device connected to a server or
software entity created on a server using USB gadget subsystem.
Whole project consists of four parts:
- usbip-vhci
A client side kernel module which provides a virtual USB Host Controller and allows to import a USB device from a remote machine.
- usbip-host (stub driver)
A server side module which provides a USB device driver which can be
bound to a physical USB device to make it exportable.
- usbip-vudc
A server side module which provides a virtual USB Device Controller and allows
to export a USB device created using USB Gadget Subsystem.
- usbip-utils
A set of userspace tools used to handle connection and management.
Used on both sides.
[Requirements]
- USB/IP device drivers
Found in the drivers/usb/usbip/ directory of the Linux kernel tree.
1. Compile & install the userspace utilities.
$ ./configure [--with-tcp-wrappers=no] [--with-usbids-dir=<dir>]
$ make install
2. Compile & install USB/IP drivers.
[Usage]
On a server side there are two entities which can be shared.
First of them is physical usb device connected to the machine.
To make it available below steps should be executed:
server:# usbip list -l
- List driver assignments for USB devices.
server:# usbip bind --busid 1-2
- Bind usbip-host.ko to the device with busid 1-2.
- The USB device 1-2 is now exportable to other hosts!
- Use `usbip unbind --busid 1-2' to stop exporting the device.
Second of shareable entities is USB Gadget created using USB Gadget Subsystem
on a server machine. To make it available below steps should be executed:
server:# (Create your USB gadget)
- Currently the most preferable way of creating a new USB gadget
is ConfigFS Composite Gadget. Please refer to its documentation for details.
- See vudc_server_example.sh for a short example of USB gadget creation
server:# insmod usbip-core.ko
server:# insmod usbip-vudc.ko
- To create more than one instance of vudc use num module param
server:# (Bind gadget to one of available vudc)
- Assign your new gadget to USB/IP UDC
- Using ConfigFS interface you may dothis simply by:
server:# cd /sys/kernel/config/usb_gadget/<gadget_name>
server:# echo "usbip-vudc.0" > UDC
server:# usbipd -D --device
- Start usbip daemon.
To attach new device to client machine below commands should be used:
client:# usbip list --remote <host>
- List exported USB devices on the <host>.
client:# usbip attach --remote <host> --busid 1-2
- Connect the remote USB device.
- When using vudc on a server side busid is really vudc instance name. For example: usbip-vudc.0
client:# usbip port
- Show virtual port status.
client:# usbip detach --port <port>
- Detach the USB device.
[Example]
---------------------------
SERVER SIDE
---------------------------
Physically attach your USB devices to this host.
In another terminal, let's look up what USB devices are physically
attached to this host.
trois:# usbip list -l
Local USB devices
=================
- busid 1-1 (05a9:a511)
1-1:1.0
- busid 3-2 (0711:0902)
3-2:1.0
- busid 3-3.1 (08bb:2702)
3-3.1:1.0
3-3.1:1.1
- busid 3-3.2 (04bb:0206)
3-3.2:1.0
- busid 3-3 (0409:0058)
3-3:1.0
- busid 4-1 (046d:08b2)
4-1:1.0
4-1:1.1
4-1:1.2
- busid 5-2 (058f:9254)
5-2:1.0
A USB storage device of busid 3-3.2 is now bound to the usb-storage
driver. To export this device, we first mark the device as "exportable"; the device is bound to the usbip-host driver. Please
remember you can not export a USB hub.
trois:# usbip list -l
Local USB devices
=================
...
- busid 3-3.2 (04bb:0206)
3-3.2:1.0
...
---------------------------
CLIENT SIDE
---------------------------
First, let's list available remote devices that are marked as
exportable on the host.
deux:# usbip attach --remote 10.0.0.3 --busid 1-1
port 0 attached
Show the devices attached to this client:
deux:# usbip port
Port 00: <Port in Use> at Full Speed(12Mbps)
Prolific Technology, Inc. : unknown product (067b:3507)
6-1 -> usbip://10.0.0.3:3240/1-1 (remote bus/dev 001/004)
6-1:1.0 used by usb-storage
/sys/class/scsi_device/0:0:0:0/device
/sys/class/scsi_host/host0/device
/sys/block/sda/device
Detach the imported device:
deux:# usbip detach --port 0
port 0 detached
[Checklist]
- See 'Debug Tips' on the project wiki.
- http://usbip.wiki.sourceforge.net/how-to-debug-usbip
- usbip-host.ko must be bound to the target device.
- See /sys/kernel/debug/usb/devices and find "Driver=..." lines of the device.
- Target USB gadget must be bound to vudc
(using USB gadget susbsys, not usbip bind command)
- Shutdown firewall.
- usbip now uses TCP port 3240.
- Disable SELinux.
- Check the kernel and daemon messages.
[Contact]
Mailing List: linux-usb@vger.kernel.org
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