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Current File : /lib/dracut/modules.d/99kdumpbase/kdump.sh
#!/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

. /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
        derror "saving vmcore failed"
    fi

    return $_ret
}

do_kdump_pre()
{
    local _ret

    if [ -n "$KDUMP_PRE" ]; then
        "$KDUMP_PRE"
        _ret=$?
        if [ $_ret -ne 0 ]; then
            derror "$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 [ $_ret -ne 0 ]; then
                derror "$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 [ $_ret -ne 0 ]; then
                derror "$file exited with $_ret status"
            fi
        done
    fi

    if [ -n "$KDUMP_POST" ]; then
        "$KDUMP_POST" "$1"
        _ret=$?
        if [ $_ret -ne 0 ]; then
            derror "$KDUMP_POST exited with $_ret status"
        fi
    fi
}

add_dump_code()
{
    DUMP_INSTRUCTION=$1
}

dump_raw()
{
    local _raw=$1

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

    dinfo "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

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

    dinfo "saving vmcore complete"
    return 0
}

dump_ssh()
{
    local _ret=0
    local _exitcode=0 _exitcode2=0
    local _opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes"
    local _dir="$KDUMP_PATH/$HOST_IP-$DATEDIR"
    local _host=$2
    local _vmcore="vmcore"
    local _ipv6_addr="" _username=""

    dinfo "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

    dinfo "saving vmcore"

    if is_ipv6_address "$_host"; then
        _username=${_host%@*}
        _ipv6_addr="[${_host#*@}]"
    fi

    if [ "${CORE_COLLECTOR%%[[:blank:]]*}" = "scp" ]; then
        if [ -n "$_username" ] && [ -n "$_ipv6_addr" ]; then
            scp -q $_opt /proc/vmcore "$_username@$_ipv6_addr:$_dir/vmcore-incomplete"
        else
            scp -q $_opt /proc/vmcore "$_host:$_dir/vmcore-incomplete"
        fi
        _exitcode=$?
    else
        $CORE_COLLECTOR /proc/vmcore | ssh $_opt $_host "umask 0077 && dd bs=512 of=$_dir/vmcore-incomplete"
        _exitcode=$?
        _vmcore="vmcore.flat"
    fi

    if [ $_exitcode -eq 0 ]; then
        ssh $_opt $_host "mv $_dir/vmcore-incomplete $_dir/$_vmcore"
        _exitcode2=$?
        if [ $_exitcode2 -ne 0 ]; then
            derror "moving vmcore failed, _exitcode:$_exitcode2"
        else
            dinfo "saving vmcore complete"
        fi
    else
        derror "saving vmcore failed, _exitcode:$_exitcode"
    fi

    dinfo "saving the $KDUMP_LOG_FILE to $_host:$_dir/"
    save_log
    if [ -n "$_username" ] && [ -n "$_ipv6_addr" ]; then
        scp -q $_opt $KDUMP_LOG_FILE "$_username@$_ipv6_addr:$_dir/"
    else
        scp -q $_opt $KDUMP_LOG_FILE "$_host:$_dir/"
    fi
    _ret=$?
    if [ $_ret -ne 0 ]; then
        derror "saving log file failed, _exitcode:$_ret"
    fi

    if [ $_exitcode -ne 0 ] || [ $_exitcode2 -ne 0 ];then
        return 1
    fi

    return 0
}

save_opalcore_ssh() {
    local _path=$1
    local _opts="$2"
    local _location=$3
    local _user_name="" _ipv6addr=""

    ddebug "_path=$_path _opts=$_opts _location=$_location"

    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

    if is_ipv6_address "$_host"; then
        _user_name=${_location%@*}
        _ipv6addr="[${_location#*@}]"
    fi

    dinfo "saving opalcore:$OPALCORE to $_location:$_path"

    if [ -n "$_user_name" ] && [ -n "$_ipv6addr" ]; then
        scp $_opts $OPALCORE $_user_name@$_ipv6addr:$_path/opalcore-incomplete
    else
        scp $_opts $OPALCORE $_location:$_path/opalcore-incomplete
    fi
    if [ $? -ne 0 ]; then
        derror "saving opalcore failed"
       return 1
    fi

    ssh $_opts $_location mv $_path/opalcore-incomplete $_path/opalcore
    dinfo "saving opalcore complete"
    return 0
}

save_vmcore_dmesg_ssh() {
    local _dmesg_collector=$1
    local _path=$2
    local _opts="$3"
    local _location=$4

    dinfo "saving vmcore-dmesg.txt to $_location:$_path"
    $_dmesg_collector /proc/vmcore | ssh $_opts $_location "umask 0077 && dd of=$_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
        dinfo "saving vmcore-dmesg.txt complete"
    else
        derror "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" ] && derror "failed to get kdumpnic!" && return 1
        _host=`ip addr show dev $kdumpnic|grep '[ ]*inet'`
        [ $? -ne 0 ] && derror "wrong kdumpnic: $kdumpnic" && return 1
        _host=`echo $_host | head -n 1 | cut -d' ' -f2`
        _host="${_host%%/*}"
        [ -z "$_host" ] && derror "wrong kdumpnic: $kdumpnic" && return 1
        HOST_IP=$_host
    fi
    return 0
}

read_kdump_conf()
{
    if [ ! -f "$KDUMP_CONF" ]; then
        derror "$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
    derror "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 [ $? -ne 0 ]; then
    derror "kdump_pre script exited with non-zero status!"
    do_final_action
    # During systemd service to reboot the machine, stop this shell script running
    exit 1
fi
make_trace_mem "kdump saving vmcore" '1:shortmem' '2+:mem' '3+:slab'
do_dump
DUMP_RETVAL=$?

do_kdump_post $DUMP_RETVAL
if [ $? -ne 0 ]; then
    derror "kdump_post script exited with non-zero status!"
fi

if [ $DUMP_RETVAL -ne 0 ]; then
    exit 1
fi

do_final_action

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