Initial Commit
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33
PKGBUILD
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33
PKGBUILD
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# Maintainer: David Thurstenson (thurstylark@gmail.com)
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pkgname=libvirt-usb-hotplug
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pkgver=0.1
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pkgrel=1
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pkgdesc="Attach and detach USB devices from libvirt guests based on udev rules"
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arch=(any)
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url="https://git.thurstylark.com/libvirt-usb-hotplug.git"
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license=('GPL')
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depends=('systemd'
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'udev'
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'libvirt')
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backup=()
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source=("libvirt-usb-hotplug.bash"
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"libvirt-usb-hotplug.conf"
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"libvirt-usb-hotplug.rules"
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"libvirt-usb-hotplug@.service"
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)
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sha256sums=()
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package() {
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install -Dm755 \
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"${srcdir}"/libvirt-usb-hotplug.bash \
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"${pkgdir}"/usr/bin/libvirt-usb-hotplug
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install -Dm644 \
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"${srcdir}"/libvirt-usb-hotplug.conf \
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"${pkgdir}"/etc/libvirt-usb-hotplug.conf
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install -Dm644 \
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"${srcdir}"/libvirt-usb-hotplug.rules \
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"${pkgdir}"/usr/lib/udev/rules.d/99-libvirt-usb-hotplug.rules
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install -Dm644 \
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"${srcdir}"/libvirt-usb-hotplug@.service \
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"${pkgdir}"/usr/lib/systemd/system/libvirt-usb-hotplug@.service
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}
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103
libvirt-usb-hotplug.bash
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103
libvirt-usb-hotplug.bash
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#!/bin/bash
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# libvirt-usb-hotplug.bash
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# This script can be used to hotplug USB devices to libvirt virtual
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# machines from udev rules with systemd services.
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# References:
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# - https://github.com/olavmrk/usb-libvirt-hotplug
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# - http://kicherer.org/joomla/index.php/en/blog/48-automatic-hotplugging-of-usb-devices-for-libvirt-managed-vms
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# - https://blog.tjll.net/systemd-for-device-activation-and-media-archiving/
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# Abort script execution on errors
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set -e
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readvars() {
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PROG="$(basename "$0")"
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ACTION=$1
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IFS='_' read DOMAIN ID_VENDOR_ID ID_MODEL_ID <<< "$2"
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if [ -z "${DOMAIN}" ]; then
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echo "Missing libvirt domain parameter for ${PROG}." >&2
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exit 1
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fi
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}
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findmatch() {
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# Iterate through devlist to find match
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for i in "${devlist[@]}"; do
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# If we find a match, return successfully
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[ "${ID_VENDOR_ID}:${ID_MODEL_ID}" = "$i" ] && return 0
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# If a match can't be found, keep looping
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continue
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done
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# If no match was found, return unsuccessfully
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return 1
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}
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case ${ACTION} in
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add)
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readvars
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COMMAND='attach-device'
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;;
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remove)
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readvars
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COMMAND='detach-device'
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;;
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match)
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# This section is responsible for determining if the corresponding udev rule
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# matches against the device in question. Udev watches exit code to determine
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# if a match was made.
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#
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# Ref: udev(7) manpage
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# Read the config file
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source /etc/libvirt-usb-hotplug.conf
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# If we should match against any usb device, just exit successfully
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[ "$matchall" = "true" ] && exit 0
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# If the devlist array is empty, no matches can be made
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[ ${#devlist[@]} = 0 ] && exit 1
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# If targetdomain is unset or empty, exit unsuccessfully
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[ ! -v targetdomain ] && exit 1
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[ "$targetdomain" = "" ] && exit 1
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# Print the targetdomain so it can be picked back up by the udev rule
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printf "%s" "$targetdomain"
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case $listmode in
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whitelist)
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# findmatch() returns 0 if match found, and 1 if match not found
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findmatch
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exit $?
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;;
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blacklist)
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# Reverse the exit status of findmatch() for blacklist mode
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! findmatch
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exit $?
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;;
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*)
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# If listmode is unset, or set improperly, exit unsuccessfully
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exit 1
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;;
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esac
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;;
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*)
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echo "Invalid script ACTION: ${ACTION}" >&2
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exit 1
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;;
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esac
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# Run the appropriate virsh-command, and ask it to read the update XML from stdin.
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echo "Running virsh ${COMMAND} ${DOMAIN} --persistent for USB vendor=0x${ID_VENDOR_ID} product=0x${ID_MODEL_ID}:" >&2
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(virsh "${COMMAND}" "${DOMAIN}" /dev/stdin --persistent || true) <<END
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<hostdev mode='subsystem' type='usb' managed='yes'>
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<source startupPolicy='optional'>
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<vendor id='0x${ID_VENDOR_ID}' />
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<product id='0x${ID_MODEL_ID}' />
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</source>
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</hostdev>
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END
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25
libvirt-usb-hotplug.conf
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25
libvirt-usb-hotplug.conf
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# libvirt-usb-hotplug.conf
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# Name of libvirt domain to which the device in question will be attached
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# Default if unset: <none> (disables matching)
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targetdomain=win10
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# Match against every usb device
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# Valid values: true, false
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# Default if unset: false
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matchall=true
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# Should the list be a whitelist, or blacklist?
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# Valid values: whitelist, blacklist
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# Default if unset: <none> (disables matching)
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listmode=blacklist
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# List of devices to match against
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# Value format: '<vendor_id>:<device_id>'
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devlist=(
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'0b05:1872' # ASUSTek Computer, Inc. AURA LED Controller
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'0b05:185c' # ASUSTek Computer, Inc. Bluetooth Radio
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)
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# vim: set ft=bash:
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13
libvirt-usb-hotplug.rules
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13
libvirt-usb-hotplug.rules
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# libvirt-usb-hotplug.rules
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ACTION=="add", \
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SUBSYSTEM=="usb", \
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PROGRAM=="/usr/bin/libvirt-usb-hotplug match" \
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SYMLINK+="libvirt_%c_%E{ID_VENDOR_ID}_%E{ID_MODEL_ID}", \
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TAG+="systemd", \
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ENV{SYSTEMD_WANTS}="libvirt_%c_%E{ID_VENDOR_ID}_%E{ID_MODEL_ID}"
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ACTION=="remove", \
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SUBSYSTEM=="usb", \
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ENV{PRODUCT}=="46d/c215/*", \
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TAG+="systemd"
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15
libvirt-usb-hotplug@.service
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15
libvirt-usb-hotplug@.service
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[Unit]
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Description=Libvirt guest usb hotplug: %I
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After=libvirtd.service
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BindsTo=dev-libvirt_%i.device
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After=dev-libvirt_%i.device
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Requisite=dev-libvirt_%i.device
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[Service]
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Type=oneshot
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RemainAfterExit=yes
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ExecStart=/usr/bin/libvirt-usb-hotplug add %I
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ExecStop=/usr/bin/libvirt-usb-hotplug remove %I
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[Install]
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WantedBy=dev-libvirt_%i.device
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