3b55fc51e8
Allow to attach disk image from different VM as block device. File attached with qvm-block -A will be visible as loopX device and as such can be detached. File path will be in device description.
43 lines
1.0 KiB
Bash
Executable File
43 lines
1.0 KiB
Bash
Executable File
#!/bin/bash
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NAME=${DEVNAME#/dev/}
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DESC="${ID_MODEL} (${ID_FS_LABEL})"
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SIZE=$[ $(cat /sys/$DEVPATH/size) * 512 ]
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MODE=w
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XS_KEY="qubes-block-devices/$NAME"
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# Ignore mounted...
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if fgrep -q $DEVNAME /proc/mounts; then
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xenstore-rm "$XS_KEY"
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exit 0
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fi
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# ... and used by device-mapper
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if [ -n "`ls -A /sys/$DEVPATH/holders 2> /dev/null`" ]; then
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xenstore-rm "$XS_KEY"
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exit 0
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fi
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# ... and "empty" loop devices
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if [ "$MAJOR" -eq 7 -a ! -d /sys/$DEVPATH/loop ]; then
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xenstore-rm "$XS_KEY"
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exit 0
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fi
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# Special case for CD
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if [ "$ID_TYPE" = "cd" ]; then
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if [ "$ID_CDROM_MEDIA" != "1" ]; then
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# Hide empty cdrom drive
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xenstore-rm "$XS_KEY"
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exit 0
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fi
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MODE=r
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fi
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# Special description for loop devices
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if [ -d /sys/$DEVPATH/loop ]; then
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DESC=$(cat /sys/$DEVPATH/loop/backing_file)
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fi
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xenstore-write "$XS_KEY/desc" "$DESC" "$XS_KEY/size" "$SIZE" "$XS_KEY/mode" "$MODE"
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# Make sure that block backend is loaded
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/sbin/modprobe xen-blkback 2> /dev/null || /sbin/modprobe blkbk
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