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#!/bin/bash
# This tries to call growfs helpers (xfs_growfs, resize2fs, ...) to resize
# the root filesystem mounted on $NEWROOT to the maximum size of the backing
# disk partition (done by dmsetup-slx-device).
. /opt/openslx/config
if [ -z "$SLX_DNBD3_DEVICE_COW" ]; then
SLX_DNBD3_DEVICE_COW="$( awk '$2 == "/" {print $1; exit}' /proc/mounts )"
fi
if ! [ -b "$SLX_DNBD3_DEVICE_COW" ]; then
echo "Cannot grow rootfs on '$SLX_DNBD3_DEVICE_COW' - not a block device"
exit 0
fi
resize_rootfs() {
# First let's check what filesystem it is
local fstype helper
declare -a options
fstype="$(blkid "$SLX_DNBD3_DEVICE_COW" | grep -oE 'TYPE=\S+')"
if [ -z "$fstype" ]; then
echo "Failed to detect filesystem on '$SLX_DNBD3_DEVICE_COW' - ignoring."
return 1
fi
fstype="${fstype#TYPE=}"
fstype="${fstype//\"/}"
case "$fstype" in
ext?)
helper="resize2fs"
options=()
;;
xfs)
helper="xfs_growfs"
options=( "-d" )
;;
*)
echo "'$fstype' not supported - ignoring."
return 1
;;
esac
if ! hash "${helper}" &> /dev/null; then
echo "'$fstype' is supported, but cannot find helper binary - ignoring."
return 1
fi
if ! "${helper}" "${options[@]}" "$SLX_DNBD3_DEVICE_COW"; then
echo "Failed to run '${helper}' on '${SLX_DNBD3_DEVICE_COW}'."
return 1
fi
return 0
}
resize_rootfs
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