kexec-tools/dracut-early-kdump-module-setup.sh

#!/bin/bash

. /etc/sysconfig/kdump
. /lib/kdump/kdump-lib.sh

KDUMP_KERNEL=""
KDUMP_INITRD=""

check() {
    if [ ! -f /etc/sysconfig/kdump ] || [ ! -f /lib/kdump/kdump-lib.sh ]\
        || [ -n "${IN_KDUMP}" ]
    then
        return 1
    fi
    return 255
}

depends() {
    echo "base shutdown"
    return 0
}

prepare_kernel_initrd() {
    KDUMP_BOOTDIR=$(check_boot_dir "${KDUMP_BOOTDIR}")
    if [ -z "$KDUMP_KERNELVER" ]; then
        kdump_kver=`uname -r`
        if [ "$kernel" != "$kdump_kver" ]; then
            dwarn "Using current kernel version '$kdump_kver' for early kdump," \
                "but the initramfs is generated for kernel version '$kernel'"
        fi
    else
        kdump_kver=$KDUMP_KERNELVER
    fi
    KDUMP_KERNEL="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
    KDUMP_INITRD="${KDUMP_BOOTDIR}/initramfs-${kdump_kver}kdump.img"
}

install() {
    prepare_kernel_initrd
    if [ ! -f "$KDUMP_KERNEL" ]; then
        derror "Could not find required kernel for earlykdump," \
            "earlykdump will not work!"
        return 1
    fi
    if [ ! -f "$KDUMP_INITRD" ]; then
        derror "Could not find required kdump initramfs for earlykdump," \
            "please ensure kdump initramfs is generated first," \
            "earlykdump will not work!"
        return 1
    fi

    inst_multiple tail find cut dirname hexdump
    inst_simple "/etc/sysconfig/kdump"
    inst_binary "/usr/sbin/kexec"
    inst_binary "/usr/bin/gawk" "/usr/bin/awk"
    inst_script "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
    inst_hook cmdline 00 "$moddir/early-kdump.sh"
    inst_binary "$KDUMP_KERNEL"
    inst_binary "$KDUMP_INITRD"

    ln_r "$KDUMP_KERNEL" "/boot/kernel-earlykdump"
    ln_r "$KDUMP_INITRD" "/boot/initramfs-earlykdump"

    chmod -x "${initdir}/$KDUMP_KERNEL"
}