4fee631c94
Exclude exclude device if mounted/part of other device, or any of its
partition is used (same definition). Update this state whenever device
or it's partition receives udev event.
Fixes QubesOS/qubes-issues#1600
(cherry picked from commit efd9854376)
41 lines
1.2 KiB
Bash
Executable File
41 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
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NAME=${DEVNAME#/dev/}
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QDB_KEY="/qubes-block-devices/$NAME"
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# Trailing slash is intentional - it will remove whole directory, instead of
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# single base entry
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qubesdb-rm "$QDB_KEY/"
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qubesdb-write /qubes-block-devices ''
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# If device was connected to some VM - detach it
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# Notice: this can be run also in VM, so we cannot use xl...
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device_detach() {
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xs_path=$1
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xenstore-write $xs_path/online 0 $xs_path/state 5
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# Wait for backend to finish dev shutdown
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try=30
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# -lt will break loop also when 'state' will be empty
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while [ "`xenstore-read $xs_path/state 2> /dev/null`" -lt 6 ]; do
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try=$[ $try - 1 ]
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[ "$try" -le 0 ] && break
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sleep 0.1
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done
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xenstore-rm $xs_path
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}
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# update info about underlying devices of device-mapper (if any)
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# at this stage device-mapper is already removed, so can't check what devices
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# were used there
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udevadm trigger --subsystem-match=block
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for XS_DEV_PATH in `xenstore-ls -f backend/vbd | grep 'backend/vbd/[0-9]*/[0-9]* ' | cut -f 1 -d ' '`; do
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CUR_DEVICE=`xenstore-read "$XS_DEV_PATH/params"`
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if [ "$CUR_DEVICE" == "$DEVNAME" ]; then
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device_detach "$XS_DEV_PATH"
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exit 0
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fi
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done
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