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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Flib%2F'>lib</a>/<a href='?path=%2Flib%2Fkdump%2F'>kdump</a>/</p><hr><h3>✏️ Editing: kdump-lib-initramfs.sh</h3>  
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            <textarea name='content' rows='20'># These variables and functions are useful in 2nd kernel

. /lib/kdump-lib.sh
. /lib/kdump-logger.sh

KDUMP_PATH=&quot;/var/crash&quot;
KDUMP_LOG_FILE=&quot;/run/initramfs/kexec-dmesg.log&quot;
CORE_COLLECTOR=&quot;&quot;
DEFAULT_CORE_COLLECTOR=&quot;makedumpfile -l --message-level 7 -d 31&quot;
DMESG_COLLECTOR=&quot;/sbin/vmcore-dmesg&quot;
FAILURE_ACTION=&quot;systemctl reboot -f&quot;
DATEDIR=`date +%Y-%m-%d-%T`
HOST_IP='127.0.0.1'
DUMP_INSTRUCTION=&quot;&quot;
SSH_KEY_LOCATION=&quot;/root/.ssh/kdump_id_rsa&quot;
KDUMP_SCRIPT_DIR=&quot;/kdumpscripts&quot;
DD_BLKSIZE=512
FINAL_ACTION=&quot;systemctl reboot -f&quot;
KDUMP_CONF=&quot;/etc/kdump.conf&quot;
KDUMP_PRE=&quot;&quot;
KDUMP_POST=&quot;&quot;
NEWROOT=&quot;/sysroot&quot;
OPALCORE=&quot;/sys/firmware/opal/mpipl/core&quot;

#initiate the kdump logger
dlog_init
if [ $? -ne 0 ]; then
    echo &quot;failed to initiate the kdump logger.&quot;
    exit 1
fi

get_kdump_confs()
{
    local config_opt config_val

    while read config_opt config_val;
    do
        # remove inline comments after the end of a directive.
        case &quot;$config_opt&quot; in
            path)
                KDUMP_PATH=&quot;$config_val&quot;
            ;;
            core_collector)
                [ -n &quot;$config_val&quot; ] &amp;&amp; CORE_COLLECTOR=&quot;$config_val&quot;
            ;;
            sshkey)
                if [ -f &quot;$config_val&quot; ]; then
                    SSH_KEY_LOCATION=$config_val
                fi
            ;;
            kdump_pre)
                KDUMP_PRE=&quot;$config_val&quot;
            ;;
            kdump_post)
                KDUMP_POST=&quot;$config_val&quot;
            ;;
            fence_kdump_args)
                FENCE_KDUMP_ARGS=&quot;$config_val&quot;
            ;;
            fence_kdump_nodes)
                FENCE_KDUMP_NODES=&quot;$config_val&quot;
            ;;
            failure_action|default)
                case $config_val in
                    shell)
                        FAILURE_ACTION=&quot;kdump_emergency_shell&quot;
                    ;;
                    reboot)
                        FAILURE_ACTION=&quot;systemctl reboot -f &amp;&amp; exit&quot;
                    ;;
                    halt)
                        FAILURE_ACTION=&quot;halt &amp;&amp; exit&quot;
                    ;;
                    poweroff)
                        FAILURE_ACTION=&quot;systemctl poweroff -f &amp;&amp; exit&quot;
                    ;;
                    dump_to_rootfs)
                        FAILURE_ACTION=&quot;dump_to_rootfs&quot;
                    ;;
                esac
            ;;
            final_action)
                case $config_val in
                    reboot)
                        FINAL_ACTION=&quot;systemctl reboot -f&quot;
                    ;;
                    halt)
                        FINAL_ACTION=&quot;halt&quot;
                    ;;
                    poweroff)
                        FINAL_ACTION=&quot;systemctl poweroff -f&quot;
                    ;;
                esac
            ;;
        esac
    done &lt;&lt;&lt; &quot;$(read_strip_comments $KDUMP_CONF)&quot;

    if [ -z &quot;$CORE_COLLECTOR&quot; ]; then
        CORE_COLLECTOR=&quot;$DEFAULT_CORE_COLLECTOR&quot;
        if is_ssh_dump_target || is_raw_dump_target; then
            CORE_COLLECTOR=&quot;$CORE_COLLECTOR -F&quot;
        fi
    fi
}

# store the kexec kernel log to a file.
save_log()
{
    dmesg -T &gt; $KDUMP_LOG_FILE

    if command -v journalctl &gt; /dev/null; then
        journalctl -ab &gt;&gt; $KDUMP_LOG_FILE
    fi
    chmod 600 $KDUMP_LOG_FILE
}

# dump_fs &lt;mount point&gt;
dump_fs()
{
    local _exitcode
    local _mp=$1
    ddebug &quot;dump_fs _mp=$_mp&quot;

    if ! is_mounted &quot;$_mp&quot;; then
        dinfo &quot;dump path \&quot;$_mp\&quot; is not mounted, trying to mount...&quot;
        mount --target $_mp
        if [ $? -ne 0 ]; then
            derror &quot;failed to dump to \&quot;$_mp\&quot;, it's not a mount point!&quot;
            return 1
        fi
    fi

    # Remove -F in makedumpfile case. We don't want a flat format dump here.
    [[ $CORE_COLLECTOR = *makedumpfile* ]] &amp;&amp; CORE_COLLECTOR=`echo $CORE_COLLECTOR | sed -e &quot;s/-F//g&quot;`

    dinfo &quot;saving to $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/&quot;

    mount -o remount,rw $_mp || return 1
    mkdir -p $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR || return 1

    save_vmcore_dmesg_fs ${DMESG_COLLECTOR} &quot;$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/&quot;
    save_opalcore_fs &quot;$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/&quot;

    dinfo &quot;saving vmcore&quot;
    $CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete
    _exitcode=$?
    if [ $_exitcode -eq 0 ]; then
        sync -f &quot;$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete&quot;
        _sync_exitcode=$?
        if [ $_sync_exitcode -eq 0 ]; then
            mv &quot;$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete&quot; &quot;$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore&quot;
            dinfo &quot;saving vmcore complete&quot;
        else
            derror &quot;sync vmcore failed, _exitcode:$_sync_exitcode&quot;
            return 1
        fi
    else
        derror &quot;saving vmcore failed, _exitcode:$_exitcode&quot;
    fi

    dinfo &quot;saving the $KDUMP_LOG_FILE to $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/&quot;
    save_log
    mv $KDUMP_LOG_FILE $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/
    if [ $_exitcode -ne 0 ]; then
        return 1
    fi

    # improper kernel cmdline can cause the failure of echo, we can ignore this kind of failure
    return 0
}

save_vmcore_dmesg_fs() {
    local _dmesg_collector=$1
    local _path=$2

    dinfo &quot;saving vmcore-dmesg.txt to ${_path}&quot;
    $_dmesg_collector /proc/vmcore &gt; ${_path}/vmcore-dmesg-incomplete.txt
    _exitcode=$?
    if [ $_exitcode -eq 0 ]; then
        mv ${_path}/vmcore-dmesg-incomplete.txt ${_path}/vmcore-dmesg.txt
        chmod 600 ${_path}/vmcore-dmesg.txt

        # Make sure file is on disk. There have been instances where later
        # saving vmcore failed and system rebooted without sync and there
        # was no vmcore-dmesg.txt available.
        sync
        dinfo &quot;saving vmcore-dmesg.txt complete&quot;
    else
        derror &quot;saving vmcore-dmesg.txt failed&quot;
    fi
}

save_opalcore_fs() {
    local _path=$1

    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=&quot;/sys/firmware/opal/core&quot;
        else
            return 0
        fi
    fi

    dinfo &quot;saving opalcore:$OPALCORE to ${_path}/opalcore&quot;
    cp $OPALCORE ${_path}/opalcore
    if [ $? -ne 0 ]; then
        derror &quot;saving opalcore failed&quot;
        return 1
    fi

    sync
    dinfo &quot;saving opalcore complete&quot;
    return 0
}

dump_to_rootfs()
{

    dinfo &quot;Trying to bring up rootfs device&quot;
    systemctl start dracut-initqueue
    dinfo &quot;Waiting for rootfs mount, will timeout after 90 seconds&quot;
    systemctl start sysroot.mount

    ddebug &quot;NEWROOT=$NEWROOT&quot;

    dump_fs $NEWROOT
}

kdump_emergency_shell()
{
    echo &quot;PS1=\&quot;kdump:\\\${PWD}# \&quot;&quot; &gt;/etc/profile
    ddebug &quot;Switching to dracut emergency...&quot;
    /bin/dracut-emergency
    rm -f /etc/profile
}

do_failure_action()
{
    dinfo &quot;Executing failure action $FAILURE_ACTION&quot;
    eval $FAILURE_ACTION
}

do_final_action()
{
    dinfo &quot;Executing final action $FINAL_ACTION&quot;
    eval $FINAL_ACTION
}
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