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#!/bin/bash
##################################################
# Include: Detect and pass USB devices to the VM #
##################################################
declare -g PASSTHROUGH_USB_DEVICES="2 0:5 0:6 0:7 0:14 0:16 0:17 239"
# include USB IDs explicitly given by SLX_PASSTHROUGH_USB_ID
# which is expected to be a space-separated list!
. /opt/openslx/config
if [ -n "${SLX_PASSTHROUGH_USB_ID}" ]; then
while IFS= read -ra USB_ID; do
for ID in ${USB_ID[@]}; do
# validate each entry and add them to the list if they pass
if ! [[ "${ID}" =~ ^[0-9a-f]{4}:[0-9a-f]{4}$ ]]; then
writelog "Rejected USB ID: '${ID}'."
continue
fi
PASSTHROUGH_USB_DEVICES+=" ${ID}"
done
done <<< "${SLX_PASSTHROUGH_USB_ID}"
fi
readonly PASSTHROUGH_USB_DEVICES
# Helper function that will scan /dev/bus/usb for devices matching specific classes
# and then output the corresponding device ids. This can be used for selective
# handover of devices to a virtual machine
#
# $1: expression to fill with device information.
# valid placeholders are:
# %VENDOR% - device vendor id
# %PRODUCT% - device product id
# $2-n: device classes to include in output
get_usb_devices_int() {
[ -z "$TMPDIR" ] && TMPDIR="/tmp"
local EXP=$1
shift
if [ -z "$EXP" ]; then
writelog --quiet "No ouput expression template passed to get_usb_devices"
EXIT_TYPE="internal" EXIT_REASON="Fehler beim Erkennen der USB-Geräte." cleanexit 1
fi
if [ $# -eq 0 ]; then
writelog --quiet "No device classes given to get_usb_devices"
cleanexit 1
fi
local MATCH=';'
while [ $# -gt 0 ]; do
MATCH+="$1;"
[[ "$1" != *:* ]] && MATCH+="0:$1;"
shift
done
local dev=
local key value trailing
trailing=
local tmp="${TMPDIR}/lsusb.$$.$RANDOM"
for dev in /dev/bus/usb/*/*; do
if ! lsusb -D "$dev" > "$tmp" 2>/dev/null; then
writelog --quiet "Cannot lsusb $dev"
continue
fi
local DC=
local OK=
local VENDOR=
local PRODUCT=
while read -r key value trailing || [ -n "$key" ]; do
if [[ "$key" == "idVendor" ]]; then
[[ "$value" == 0x* ]] && VENDOR="${value:2}"
elif [[ "$key" == "idProduct" ]]; then
[[ "$value" == 0x* ]] && PRODUCT="${value:2}"
elif [ -z "$DC" ]; then
# No bDeviceClass seen yet
if [[ "$key" == "bDeviceClass" ]]; then
DC="$value"
[[ "$MATCH" == *";${DC};"* ]] && OK=yo
fi
else
# #DeviceClass is generic, look at sub class
if [[ "$key" == "bInterfaceClass" ]]; then
[[ "$MATCH" == *";${DC}:${value};"* ]] && OK=yo
fi
fi
if [ -n "$OK" -a -n "$VENDOR" -a -n "$PRODUCT" ] || \
[[ "$MATCH" == *";${VENDOR}:${PRODUCT};"* ]]; then
echo "$EXP" | sed "s/%VENDOR%/${VENDOR}/g;s/%PRODUCT%/${PRODUCT}/g"
break
fi
done < "$tmp"
done
rm -f -- "$tmp"
}
get_usb_devices() {
if which lsusb 2>/dev/null >&2 && lsusb --help 2>&1 | grep -q -- '-D' 2>/dev/null; then
[ $# -eq 1 ] && set -- "$1" $PASSTHROUGH_USB_DEVICES # no quotes here!
get_usb_devices_int "$@" | sort -u
else
writelog --quiet "Cannot scan usb bus: lsusb not found or doesn't support -D"
fi
}
# kinda of a special case since we only define functions
# the handler will only check if the functions are properly defined
check_usb_detector() {
if ! is_function get_usb_devices get_usb_devices_int; then
# this should practically never happen
writelog "'get_usb_devices[_int]' functions are not defined!"
return 1
fi
return 0
}
reg_feature_handler "usb" "check_usb_detector"
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