set -x -e

# Test how <devname> and --name= are handled for create mode.
# We need to check three properties, generated from those parameters:
# - devnode name
# - link in /dev/md/ (MD_DEVNAME property from --detail --export)
# - name in metadata (MD_NAME property from --examine --export)

function _verify() {
  local DEVNODE_NAME="$1"
  local WANTED_LINK="$2"
  local WANTED_NAME="$3"

  local RES="$(mdadm -D --export $DEVNODE_NAME | grep MD_DEVNAME)"
  if [[ "$?" != "0" ]]; then
    echo "Cannot get details for $DEVNODE_NAME - unexpected devnode."
    exit 1
  fi

  if [[ "$WANTED_LINK" != "empty" ]]; then
    local EXPECTED="MD_DEVNAME=$WANTED_LINK"
      if [[ "$RES" != "$EXPECTED" ]]; then
        echo "$RES doesn't match $EXPECTED."
        exit 1
      fi
  fi


  local RES="$(mdadm -E --export $dev0 | grep MD_NAME)"
  if [[ "$?" != "0" ]]; then
    echo "Cannot get metadata from $dev0."
    exit 1
  fi

  local EXPECTED="MD_NAME=$(hostname):$WANTED_NAME"
  if [[ "$RES" != "$EXPECTED" ]]; then
    echo "$RES doesn't match $EXPECTED."
    exit 1
  fi
}

function _create() {
  local DEVNAME=$1
  local NAME=$2

  if [[ -z "$NAME" ]]; then
    mdadm -CR "$DEVNAME" -l0 -n 1 $dev0 --force
  else
    mdadm -CR "$DEVNAME" --name="$NAME" -l0 -n 1 $dev0 --force
  fi

  if [[ "$?" != "0" ]]; then
    echo "Cannot create device."
    exit 1
  fi
}

# The most trivial case.
_create "/dev/md/name"
_verify "/dev/md127" "name" "name"
mdadm -S "/dev/md127"

_create "name"
_verify "/dev/md127" "name" "name"
mdadm -S "/dev/md127"

# Use 'mdX' as name.
_create "/dev/md/md0"
_verify "/dev/md127" "md0" "md0"
mdadm -S "/dev/md127"

_create "md0"
_verify "/dev/md127" "md0" "md0"
mdadm -S "/dev/md127"

# <devnode> is used to create MD_DEVNAME but, name is used to create MD_NAME.
_create "/dev/md/devnode" "name"
_verify "/dev/md127" "devnode" "name"
mdadm -S "/dev/md127"

_create "devnode" "name"
_verify "/dev/md127" "devnode" "name"
mdadm -S "/dev/md127"

# Devnode points to /dev/ directory. MD_DEVNAME doesn't exist.
_create "/dev/md0"
_verify "/dev/md0" "empty" "0"
mdadm -S "/dev/md0"

# Devnode points to /dev/ directory and name is set.
_create "/dev/md0" "name"
_verify "/dev/md0" "empty" "name"
mdadm -S "/dev/md0"