diskimage-builder/elements/deploy-ironic/init.d/70-ironic-root-device

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CHECK_SIZE=false
CHECK_MODEL=false
CHECK_VENDOR=false
CHECK_UUID=false
CHECK_WWN=false
CHECK_HCTL=false
CHECK_SERIAL=false
# URL/Percent decode a text
function urldecode() {
local encoded="${1//+/ }"
printf '%b' "${encoded//%/\x}"
}
# Lowercase and url decode the values
function normalize() {
echo `urldecode "${1,,}"`
}
function _exec_lsblk() {
lsblk -Pbio $2 /dev/$1 | head -n 1 | grep -Po "(?<=^$2=).*" | tr "\"" " "
}
# Get the block device size in GiB
function get_size() {
echo $(( (512 * $(cat /sys/block/$1/size) ) / 2**30))
}
function get_model() {
local file
file=/sys/block/$1/device/model
if [ -f $file ]; then
normalize "$(cat $file)"
fi
}
function get_vendor() {
local file
file=/sys/block/$1/device/vendor
if [ -f $file ]; then
normalize "$(cat $file)"
fi
}
function get_wwn() {
normalize "$(_exec_lsblk "$1" WWN)"
}
function get_serial() {
normalize "$(_exec_lsblk "$1" SERIAL)"
}
# Parse all the hints from the Kernel cmdline and set the CHECK_*
# variables
function parse_hints() {
IFS=',' read -ra H <<< "$ROOT_DEVICE"
for i in "${H[@]}"; do
case "$i" in
size=*)
CHECK_SIZE="${i#size=}"
;;
model=*)
CHECK_MODEL=`normalize "${i#model=}"`
;;
vendor=*)
CHECK_VENDOR=`normalize "${i#vendor=}"`
;;
wwn=*)
CHECK_WWN=`normalize "${i#wwn=}"`
;;
serial=*)
CHECK_SERIAL=`normalize "${i#serial=}"`
;;
*)
;;
esac
done
}
function get_root_device() {
# Parse the hints
parse_hints
for DEV in /sys/block/* ; do
DEV_NAME=${DEV##*/}
DEV_PATH=/dev/$DEV_NAME
# Ignore loop and ram devices
[[ $DEV_NAME = *loop* || $DEV_NAME = *ram* ]] && continue || :
# Find out if it's a CDROM
TYPE=/sys/block/$DEV_NAME/device/type
[[ -f $TYPE ]] && (( $(cat "$TYPE") == 5 )) && continue || :
[[ $CHECK_SIZE != false && $(get_size "$DEV_NAME") != $CHECK_SIZE ]] && continue || :
[[ $CHECK_MODEL != false && $(get_model "$DEV_NAME") != $CHECK_MODEL ]] && continue || :
[[ $CHECK_VENDOR != false && $(get_vendor "$DEV_NAME") != $CHECK_VENDOR ]] && continue || :
[[ $CHECK_SERIAL != false && $(get_serial "$DEV_NAME") != $CHECK_SERIAL ]] && continue || :
[[ $CHECK_WWN != false && $(get_wwn "$DEV_NAME") != $CHECK_WWN ]] && continue || :
# A device that matches all hints was found
echo "$DEV_PATH"
break
done
}