Search

20.16.7. Redirected Devices

download PDF
USB device redirection through a character device is supported by configuring it with management tools that modify the following section of the domain xml:

  ...
  <devices>
    <redirdev bus='usb' type='tcp'>
      <source mode='connect' host='localhost' service='4000'/>
      <boot order='1'/>
    </redirdev>
    <redirfilter>
      <usbdev class='0x08' vendor='0x1234' product='0xbeef' version='2.00' allow='yes'/>
      <usbdev allow='no'/>
    </redirfilter>
  </devices>
  ...

Figure 20.33. Devices - redirected devices

The components of this section of the domain XML are as follows:
Table 20.15. Redirected device elements
ParameterDescription
redirdevThis is the main container for describing redirected devices. bus must be usb for a USB device. An additional attribute type is required, matching one of the supported serial device types, to describe the host physical machine side of the tunnel; type='tcp' or type='spicevmc' (which uses the usbredir channel of a SPICE graphics device) are typical. The redirdev element has an optional sub-element address which can tie the device to a particular controller. Further sub-elements, such as source, may be required according to the given type, although atarget sub-element is not required (since the consumer of the character device is the hypervisor itself, rather than a device visible in the guest virtual machine).
bootSpecifies that the device is bootable. The order attribute determines the order in which devices will be tried during boot sequence. The per-device boot elements cannot be used together with general boot elements in BIOS boot loader section.
redirfilterThis is used for creating the filter rule to filter out certain devices from redirection. It uses sub-element usbdev to define each filter rule. The class attribute is the USB Class code.
Red Hat logoGithubRedditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

© 2024 Red Hat, Inc.