qubes-linux-utils/udev/udev-usb-add-change

#!/bin/sh

##
## This script is invoked by udev rules whenever USB device appears or
## changes. This happens in usbvm domain (or dom0 if USB controller
## drivers are in dom0). The script records information about available
## USB devices into XS directory, making it available to qvm-usb tool
## running in dom0.
##

# FIXME: Ignore USB hubs and other wierd devices (see also in udev-usb-remove).
[ "`echo $TYPE | cut -f1 -d/`" = "9" ] && exit 0
[ "$DEVTYPE" != "usb_device" ] && exit 0

# qubesdb doesn't allow dot in key name
XSNAME=`basename ${DEVPATH} | tr . _`

# FIXME: For some devices (my Cherry keyboard) ID_SERIAL does not
# contain proper human-readable name, should find better method to
# build devide description.
#DESC=`python -c "dev='%d-%d' % (int('${BUSNUM}'.lstrip('0')), (int('${DEVNUM}'.lstrip('0'))-1)); from xen.util import vusb_util; print vusb_util.get_usbdevice_info(dev);"`
DESC="${ID_VENDOR_ID}:${ID_MODEL_ID} ${ID_SERIAL}"

VERSION=`cat /sys/$DEVPATH/version | tr -d ' '|cut -f 1 -d .`

# ignore usbip-connected devices, as most likely already passed through from
# another VM
if [ "`echo $DEVPATH | cut -d / -f 2-4`" = "devices/platform/vhci_hcd" ]; then
    exit 0
fi

QDB_KEY="/qubes-usb-devices/$XSNAME"

qubesdb-write "$QDB_KEY/desc" "$DESC"
qubesdb-write "$QDB_KEY/usb-ver" "$VERSION"
qubesdb-write /qubes-usb-devices ''

# Make sure PVUSB backend driver is loaded.
/sbin/modprobe xen-usbback 2> /dev/null || true