#!/bin/bash
# Copyright 2010-2013 Frank Liepold /  1&1 Internet AG
#
# Email: frank.liepold@1und1.de
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

function resize_prepare
{
    local primary_host=${main_host_list[0]}
    local secondary_host="${main_host_list[1]}"
    local data_dev_size_orig=${resource_device_size_list[0]}
    local res=$(lv_config_get_lv_name $data_dev_size_orig)
    local dev=$(lv_config_get_lv_device $data_dev_size_orig)
    local host

    resize_resize_to_orig_size $primary_host $secondary_host $dev \
                               $data_dev_size_orig
    resource_leave_all
    for host in $primary_host $secondary_host; do
        lv_config_resize_device $host $dev $data_dev_size_orig
    done
    resource_prepare
    resource_run 
    lib_wait_until_action_stops "syncstatus" $secondary_host $res \
                                  $resize_maxtime_sync \
                                  $resize_time_constant_sync

    # after sync disk state must be Outdated || Uptodate
    marsview_check $secondary_host $res "disk" ".*date.*" || lib_exit 1
}

function resize_run
{
    local primary_host=${main_host_list[0]}
    local secondary_host=${main_host_list[1]}
    local data_dev_size_orig=${resource_device_size_list[0]}
    local data_dev_size_new=$(($data_dev_size_orig + $resize_size_to_add))
    local mars_data_dev_size_new=$((data_dev_size_new \
                                    - $resize_diff_to_phsyical))
    local res=$(lv_config_get_lv_name $data_dev_size_orig)
    local dev=$(lv_config_get_lv_device $data_dev_size_orig)
    local writer_pid writer_script
    local host role logfile length_logfile

    mount_mount_data_device

    lib_rw_start_writing_data_device "writer_pid" "writer_script"

    for host in $primary_host $secondary_host; do
        lv_config_resize_device $host $dev $data_dev_size_new
        lib_linktree_check_link_int_value $host $res "actsize" \
                                          $data_dev_size_new 1000000000
    done

    for role in "primary" "secondary"; do
        eval host='$'${role}_host
        marsadm_do_cmd $host "pause-sync" $res || lib_exit 1
        marsview_check $host $res "disk" ".*date.*" || lib_exit 1
        marsview_check $host $res "repl" "--FA-" || lib_exit 1
    done

    marsadm_do_cmd $primary_host "resize" "$res ${mars_data_dev_size_new}G" || \
                                                                lib_exit 1
    for host in $primary_host $secondary_host; do
        marsadm_do_cmd $host "resume-sync" $res || lib_exit 1
    done

    lib_wait_until_action_stops "syncstatus" $secondary_host $res \
                                  $resize_maxtime_sync \
                                  $resize_time_constant_sync

    lib_linktree_check_link_int_value $secondary_host $res "syncstatus" \
                                      $mars_data_dev_size_new 1000000000
    # after sync disk state must be Outdated || Uptodate
    marsview_check $secondary_host $res "disk" ".*date.*" || lib_exit 1

    lib_rw_stop_writing_data_device $writer_script 

    lib_wait_until_fetch_stops "resize" $secondary_host $primary_host $res \
                               "logfile" "length_logfile"

    file_handling_check_equality_of_file_lengths $logfile $primary_host \
                                                 $secondary_host $length_logfile

    lib_wait_until_action_stops "replay" $secondary_host $res \
                                  $resize_maxtime_apply \
                                  $resize_time_constant_apply

    for role in "primary" "secondary"; do
        eval host='$'${role}_host
        marsview_check $host $res "disk" "Uptodate" || lib_exit 1
        marsview_check $host $res "repl" "-SFA-" || lib_exit 1
    done

    mount_umount $primary_host $dev $mount_test_mount_point

    lib_rw_compare_checksums $primary_host $secondary_host $dev

    resize_resize_to_orig_size $primary_host $secondary_host $dev \
                               $data_dev_size_orig
}

function resize_resize_to_orig_size
{
    local primary_host=$1 secondary_host=$2 dev=$3 data_dev_size_orig=$4
    local host

    resource_leave_all
    for host in $primary_host $secondary_host; do
        lv_config_resize_device $host $dev $data_dev_size_orig
    done
}

# TODO for i in $(seq 1 1 5);do  f=/mnt/test/f$i; date +'%Y%m%d%H%M%S'; dd if=/dev/vg-mars/lv-20 conv=fsync of=$f bs=4K count=125K ; rm -f $f; date +'%Y%m%d%H%M%S';  done