b1ec6a6248
xenstore is very slow, so don't bother it when unneeded. Namely do not try to remove entries, which haven't even created.
51 lines
1.1 KiB
Bash
Executable File
51 lines
1.1 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/$NAME"
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xs_remove() {
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if [ "$QUBES_EXPOSED" == "1" ]; then
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xenstore-rm "$XS_KEY"
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fi
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echo QUBES_EXPOSED=0
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}
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# Ignore mounted...
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if fgrep -q $DEVNAME /proc/mounts; then
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xs_remove
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exit 0
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fi
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# ... and used by device-mapper
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if [ -n "`ls -A /sys/$DEVPATH/holders 2> /dev/null`" ]; then
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xs_remove
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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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xs_remove
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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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xs_remove
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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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echo QUBES_EXPOSED=1
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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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