#!/bin/bash -e
#
#  Copyright (C) 2016 ScyllaDB

. /usr/lib/scylla/scylla_lib.sh

if [ ! -f /sbin/mkfs.xfs ]; then
    if is_debian_variant; then
        apt-get install -y xfsprogs
    elif is_gentoo_variant; then
        emerge -uq sys-fs/xfsprogs
    else
        yum install -y xfsprogs
    fi
fi

mkdir -p /var/tmp/mnt
dd if=/dev/zero of=/var/tmp/kernel-check.img bs=1M count=128 > /dev/null 2>&1
mkfs.xfs /var/tmp/kernel-check.img > /dev/null
mount /var/tmp/kernel-check.img /var/tmp/mnt -o loop
iotune --fs-check --evaluation-directory /var/tmp/mnt > /dev/null 2>&1 &&:
RET=$?
umount /var/tmp/mnt
rm -rf /var/tmp/mnt
rm /var/tmp/kernel-check.img
if [ $RET -eq 0 ]; then
    echo "This is a supported kernel version."
else
    echo "This is an unsupported kernel version."
    if [ "$ID" = "ubuntu" ] && [ "$VERSION_ID" = "14.04" ]; then
        echo "Please upgrade to a newer kernel version by executing 'apt-get install linux-image-generic-lts-vivid && reboot'."
    else
        echo "Please upgrade to a newer kernel version."
    fi
    echo " see http://www.scylladb.com/kb/kb-fs-not-qualified-aio/ for details"
fi
exit $RET