#!/bin/bash

# Copyright (C) 2012 Karel Zak <kzak@redhat.com>

TS_TOPDIR="$(dirname $0)/../.."
TS_DESC="umount-recursive"

. $TS_TOPDIR/functions.sh
ts_init "$*"
ts_skip_nonroot

modprobe --dry-run --quiet scsi_debug
[ "$?" == 0 ] || ts_skip "missing scsi_debug module"

ts_log "Init device"
$TS_CMD_UMOUNT --recursive $MOUNTPOINT &> /dev/null
rmmod scsi_debug &> /dev/null
modprobe scsi_debug dev_size_mb=50
[ "$?" == 0 ] || ts_die "Cannot init device"

sleep 3

DEVNAME=$(grep scsi_debug /sys/block/*/device/model | awk -F '/' '{print $4}')
[ "x${DEVNAME}" == "x" ] && ts_die "Cannot find device"

DEVICE="/dev/${DEVNAME}"

ts_log "Create partitions"
$TS_CMD_FDISK ${DEVICE} &> /dev/null <<EOF
n
p
1

+10M
n
p
2

+10M
n
p
3

+10M
n
p

+10M
w
q
EOF

ts_log "Create filesystem A"
mkfs.ext2 ${DEVICE}1 &> /dev/null
ts_log "Create filesystem B"
mkfs.ext2 ${DEVICE}2 &> /dev/null
ts_log "Create filesystem C"
mkfs.ext2 ${DEVICE}3 &> /dev/null
ts_log "Create filesystem D"
mkfs.ext2 ${DEVICE}4 &> /dev/null


ts_log "Do tests..."

[ -d "$TS_MOUNTPOINT" ] || mkdir -p $TS_MOUNTPOINT

ts_log "A) Mount root"
$TS_CMD_MOUNT ${DEVICE}1 $TS_MOUNTPOINT >> $TS_OUTPUT 2>&1
$TS_CMD_MOUNT --make-shared $TS_MOUNTPOINT

ts_log "B) Mount child"
mkdir -p $TS_MOUNTPOINT/mntB
$TS_CMD_MOUNT ${DEVICE}2 $TS_MOUNTPOINT/mntB >> $TS_OUTPUT 2>&1

ts_log "B2) Mount child-bind"
mkdir -p $TS_MOUNTPOINT/bindB
$TS_CMD_MOUNT --bind $TS_MOUNTPOINT/mntB $TS_MOUNTPOINT/bindB >> $TS_OUTPUT 2>&1

ts_log "C) Mount child/child"
mkdir -p $TS_MOUNTPOINT/mntB/mnt{C,D}
$TS_CMD_MOUNT ${DEVICE}3 $TS_MOUNTPOINT/mntB/mntC >> $TS_OUTPUT 2>&1

ts_log "D) Mount child/child"
$TS_CMD_MOUNT ${DEVICE}4 $TS_MOUNTPOINT/mntB/mntD >> $TS_OUTPUT 2>&1

ts_log "E) Mount child-bind"
mkdir -p $TS_MOUNTPOINT/bindC
$TS_CMD_MOUNT --bind $TS_MOUNTPOINT/mntB/mntC $TS_MOUNTPOINT/bindC

$TS_CMD_UMOUNT --recursive $TS_MOUNTPOINT >> $TS_OUTPUT 2>&1
[ $? == 0 ] || ts_die "umount failed"

sleep 3
rmmod scsi_debug >> $TS_OUTPUT 2>&1
[ $? == 0 ] || ts_die "device busy (umount failed?)"

ts_log "Success"
ts_finalize

