grub-lvmdevice.patch

   1 --- grub-1.97.1/util/grub-mkconfig.in~  2009-11-17 17:02:16.626243372 +0200
   2 +++ grub-1.97.1/util/grub-mkconfig.in   2009-11-17 17:02:08.346050859 +0200
   3 @@ -120,6 +120,27 @@
   4
   5  # Device containing our userland.  Typically used for root= parameter.
   6  GRUB_DEVICE="`${grub_probe} --target=device /`"
   7 +
   8 +# Rewrite to sane LVM node (Code from PLD Linux geninitrd):
   9 +# /dev/mapper/sys-rootfs -> /dev/sys/rootfs
  10 +# /dev/mapper/blodnatt-blah--bleh -> /dev/blodnatt/blah-bleh
  11 +# /dev/mapper/vg--meaw-root -> /dev/vg-meaw/root
  12 +case "$GRUB_DEVICE" in
  13 +       /dev/mapper/*-*)
  14 +               DM_REAL_DEVICE="$(readlink -f "$GRUB_DEVICE")"
  15 +               DM_UUID="$(cat /sys/block/${DM_REAL_DEVICE#/dev/}/dm/uuid)"
  16 +               case "$DM_UUID" in
  17 +                       LVM-*)
  18 +                               # change "--" to / (as "/" is impossible in LV name)
  19 +                               local dev=$(awk -vdev="${GRUB_DEVICE#/dev/mapper/}" 'BEGIN{gsub(/--/, "/", dev); print dev}')
  20 +                               local VG=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[1]); print v[1]}')
  21 +                               local LV=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[2]); print v[2]}')
  22 +                               GRUB_DEVICE=/dev/$VG/$LV
  23 +                               ;;
  24 +               esac
  25 +       ;;
  26 +esac
  27 +
  28  GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true
  29
  30  # Device containing our /boot partition.  Usually the same as GRUB_DEVICE.