qubes-linux-utils/udev/udev-block-remove
Marek Marczykowski-Górecki b4f48c1770 udev: update hotplug block scripts for QubesDB
Some initial work was done, but apparently not complete and buggy.
2014-12-11 06:06:57 +01:00

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#!/bin/sh
NAME=${DEVNAME#/dev/}
QDB_KEY="/qubes-block-devices/$NAME"
# Trailing slash is intentional - it will remove whole directory, instead of
# single base entry
qubesdb-rm "$QDB_KEY/"
qubesdb-write /qubes-block-devices ''
# If device was connected to some VM - detach it
# Notice: this can be run also in VM, so we cannot use xl...
device_detach() {
xs_path=$1
xenstore-write $xs_path/online 0 $xs_path/state 5
# Wait for backend to finish dev shutdown
try=30
# -lt will break loop also when 'state' will be empty
while [ "`xenstore-read $xs_path/state 2> /dev/null`" -lt 6 ]; do
try=$[ $try - 1 ]
[ "$try" -le 0 ] && break
sleep 0.1
done
xenstore-rm $xs_path
}
for XS_DEV_PATH in `xenstore-ls -f backend/vbd | grep 'backend/vbd/[0-9]*/[0-9]* ' | cut -f 1 -d ' '`; do
CUR_DEVICE=`xenstore-read "$XS_DEV_PATH/params"`
if [ "$CUR_DEVICE" == "$DEVNAME" ]; then
device_detach "$XS_DEV_PATH"
exit 0
fi
done