#! /bin/sh

KEXEC=/sbin/kexec

standard_kexec_args="-p"

EARLY_KDUMP_INITRD=""

EARLY_KDUMP_KERNEL=""

EARLY_KDUMP_CMDLINE=""

EARLY_KDUMP_KERNELVER=""

EARLY_KEXEC_ARGS=""

. /etc/sysconfig/kdump

. /lib/dracut-lib.sh

. /lib/kdump-lib.sh

. /lib/kdump-logger.sh

# initiate the kdump logger

if ! dlog_init; then

        echo "failed to initiate the kdump logger."

        exit 1

fi

prepare_parameters()

{

    EARLY_KDUMP_CMDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")

    EARLY_KDUMP_KERNEL="/boot/kernel-earlykdump"

    EARLY_KDUMP_INITRD="/boot/initramfs-earlykdump"

}

early_kdump_load()

{

    if ! check_kdump_feasibility; then

        return 1

    fi

    if is_fadump_capable; then

        dwarn "WARNING: early kdump doesn't support fadump."

        return 1

    fi

    if is_kernel_loaded "kdump"; then

        return 1

    fi

    prepare_parameters

    EARLY_KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")

    if is_secure_boot_enforced; then

        dinfo "Secure Boot is enabled. Using kexec file based syscall."

        EARLY_KEXEC_ARGS="$EARLY_KEXEC_ARGS -s"

    fi

    # Here, only output the messages, but do not save these messages

    # to a file because the target disk may not be mounted yet, the

    # earlykdump is too early.

    ddebug "earlykdump: $KEXEC ${EARLY_KEXEC_ARGS} $standard_kexec_args \

	--command-line=$EARLY_KDUMP_CMDLINE --initrd=$EARLY_KDUMP_INITRD \

	$EARLY_KDUMP_KERNEL"

    if $KEXEC $EARLY_KEXEC_ARGS $standard_kexec_args \

        --command-line="$EARLY_KDUMP_CMDLINE" \

        --initrd=$EARLY_KDUMP_INITRD $EARLY_KDUMP_KERNEL; then

        dinfo "kexec: loaded early-kdump kernel"

        return 0

    else

        derror "kexec: failed to load early-kdump kernel"

        return 1

    fi

}

set_early_kdump()

{

    if getargbool 0 rd.earlykdump; then

        dinfo "early-kdump is enabled."

        early_kdump_load

    else

        dinfo "early-kdump is disabled."

    fi

    return 0

}

set_early_kdump