#!/bin/sh

# continue here only if we have to save dump.

if [ -f /etc/fadump.initramfs ] && [ ! -f /proc/device-tree/rtas/ibm,kernel-dump ] && [ ! -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then

    exit 0

fi

exec &> /dev/console

. /lib/dracut-lib.sh

. /lib/kdump-lib-initramfs.sh

set -o pipefail

DUMP_RETVAL=0

export PATH=$PATH:$KDUMP_SCRIPT_DIR

do_dump()

{

    local _ret

    eval $DUMP_INSTRUCTION

    _ret=$?

    if [ $_ret -ne 0 ]; then

        echo "kdump: saving vmcore failed"

    fi

    return $_ret

}

do_kdump_pre()

{

    local _ret

    if [ -n "$KDUMP_PRE" ]; then

        "$KDUMP_PRE"

        _ret=$?

        if [ $_ret -ne 0 ]; then

            echo "kdump: $KDUMP_PRE exited with $_ret status"

            return $_ret

        fi

    fi

    # if any script fails, it just raises warning and continues

    if [ -d /etc/kdump/pre.d ]; then

        for file in /etc/kdump/pre.d/*; do

            "$file"

            _ret=$?

            if [ $_ret -ne 0 ]; then

                echo "kdump: $file exited with $_ret status"

            fi

        done

    fi

    return 0

}

do_kdump_post()

{

    local _ret

    if [ -d /etc/kdump/post.d ]; then

        for file in /etc/kdump/post.d/*; do

            "$file" "$1"

            _ret=$?

            if [ $_ret -ne 0 ]; then

                echo "kdump: $file exited with $_ret status"

            fi

        done

    fi

    if [ -n "$KDUMP_POST" ]; then

        "$KDUMP_POST" "$1"

        _ret=$?

        if [ $_ret -ne 0 ]; then

            echo "kdump: $KDUMP_POST exited with $_ret status"

        fi

    fi

}

add_dump_code()

{

    DUMP_INSTRUCTION=$1

}

dump_raw()

{

    local _raw=$1

    [ -b "$_raw" ] || return 1

    echo "kdump: saving to raw disk $_raw"

    if ! $(echo -n $CORE_COLLECTOR|grep -q makedumpfile); then

        _src_size=`ls -l /proc/vmcore | cut -d' ' -f5`

        _src_size_mb=$(($_src_size / 1048576))

        monitor_dd_progress $_src_size_mb &

    fi

    echo "kdump: saving vmcore"

    $CORE_COLLECTOR /proc/vmcore | dd of=$_raw bs=$DD_BLKSIZE >> /tmp/dd_progress_file 2>&1 || return 1

    sync

    echo "kdump: saving vmcore complete"

    return 0

}

dump_ssh()

{

    local _opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes"

    local _dir="$KDUMP_PATH/$HOST_IP-$DATEDIR"

    local _host=$2

    echo "kdump: saving to $_host:$_dir"

    cat /var/lib/random-seed > /dev/urandom

    ssh -q $_opt $_host mkdir -p $_dir || return 1

    save_vmcore_dmesg_ssh ${DMESG_COLLECTOR} ${_dir} "${_opt}" $_host

    save_opalcore_ssh ${_dir} "${_opt}" $_host

    echo "kdump: saving vmcore"

    if [ "${CORE_COLLECTOR%%[[:blank:]]*}" = "scp" ]; then

        scp -q $_opt /proc/vmcore "$_host:$_dir/vmcore-incomplete" || return 1

        ssh $_opt $_host "mv $_dir/vmcore-incomplete $_dir/vmcore" || return 1

    else

        $CORE_COLLECTOR /proc/vmcore | ssh $_opt $_host "dd bs=512 of=$_dir/vmcore-incomplete" || return 1

        ssh $_opt $_host "mv $_dir/vmcore-incomplete $_dir/vmcore.flat" || return 1

    fi

    echo "kdump: saving vmcore complete"

    return 0

}

save_opalcore_ssh() {

    local _path=$1

    local _opts="$2"

    local _location=$3

    if [ ! -f $OPALCORE ]; then

        # Check if we are on an old kernel that uses a different path

        if [ -f /sys/firmware/opal/core ]; then

            OPALCORE="/sys/firmware/opal/core"

        else

            return 0

        fi

    fi

    echo "kdump: saving opalcore"

    scp $_opts $OPALCORE $_location:$_path/opalcore-incomplete

    if [ $? -ne 0 ]; then

        echo "kdump: saving opalcore failed"

       return 1

    fi

    ssh $_opts $_location mv $_path/opalcore-incomplete $_path/opalcore

    echo "kdump: saving opalcore complete"

    return 0

}

save_vmcore_dmesg_ssh() {

    local _dmesg_collector=$1

    local _path=$2

    local _opts="$3"

    local _location=$4

    echo "kdump: saving vmcore-dmesg.txt"

    $_dmesg_collector /proc/vmcore | ssh $_opts $_location "dd of=$_path/vmcore-dmesg-incomplete.txt"

    _exitcode=$?

    if [ $_exitcode -eq 0 ]; then

        ssh -q $_opts $_location mv $_path/vmcore-dmesg-incomplete.txt $_path/vmcore-dmesg.txt

        echo "kdump: saving vmcore-dmesg.txt complete"

    else

        echo "kdump: saving vmcore-dmesg.txt failed"

    fi

}

get_host_ip()

{

    local _host

    if is_nfs_dump_target || is_ssh_dump_target

    then

        kdumpnic=$(getarg kdumpnic=)

        [ -z "$kdumpnic" ] && echo "kdump: failed to get kdumpnic!" && return 1

        _host=`ip addr show dev $kdumpnic|grep '[ ]*inet'`

        [ $? -ne 0 ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1

        _host=`echo $_host | head -n 1 | cut -d' ' -f2`

        _host="${_host%%/*}"

        [ -z "$_host" ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1

        HOST_IP=$_host

    fi

    return 0

}

read_kdump_conf()

{

    if [ ! -f "$KDUMP_CONF" ]; then

        echo "kdump: $KDUMP_CONF not found"

        return

    fi

    get_kdump_confs

    # rescan for add code for dump target

    while read config_opt config_val;

    do

        # remove inline comments after the end of a directive.

        case "$config_opt" in

        dracut_args)

            config_val=$(get_dracut_args_target "$config_val")

            if [ -n "$config_val" ]; then

                config_val=$(get_mntpoint_from_target "$config_val")

                add_dump_code "dump_fs $config_val"

            fi

            ;;

        ext[234]|xfs|btrfs|minix|nfs)

            config_val=$(get_mntpoint_from_target "$config_val")

            add_dump_code "dump_fs $config_val"

            ;;

        raw)

            add_dump_code "dump_raw $config_val"

            ;;

        ssh)

            add_dump_code "dump_ssh $SSH_KEY_LOCATION $config_val"

            ;;

        esac

    done <<< "$(read_strip_comments $KDUMP_CONF)"

}

fence_kdump_notify()

{

    if [ -n "$FENCE_KDUMP_NODES" ]; then

        $FENCE_KDUMP_SEND $FENCE_KDUMP_ARGS $FENCE_KDUMP_NODES &

    fi

}

read_kdump_conf

fence_kdump_notify

get_host_ip

if [ $? -ne 0 ]; then

    echo "kdump: get_host_ip exited with non-zero status!"

    exit 1

fi

if [ -z "$DUMP_INSTRUCTION" ]; then

    add_dump_code "dump_fs $NEWROOT"

fi

do_kdump_pre

if [ $? -ne 0 ]; then

    echo "kdump: kdump_pre script exited with non-zero status!"

    do_final_action

    # During systemd service to reboot the machine, stop this shell script running

    exit 1

fi

make_trace_mem "kdump saving vmcore" '1:shortmem' '2+:mem' '3+:slab'

do_dump

DUMP_RETVAL=$?

do_kdump_post $DUMP_RETVAL

if [ $? -ne 0 ]; then

    echo "kdump: kdump_post script exited with non-zero status!"

fi

if [ $DUMP_RETVAL -ne 0 ]; then

    exit 1

fi

do_final_action