[PATCH V2] Add early kdump support in initramfs.

[Lianbo Jiang]

Kdump service runs too late, so early crashes will have no chance
to get kdump kernel booting. A proposal is add a dracut module to
load pre-built kernel and initramfs for early kdump, one can provide
"rd.early-kdump" in grub commandline to enable, then the service
can load those files like original kdump, which is disabled by
default.

For the normal kdump service in real root init path, it can check
whether the pre-built kernel and initramfs has been loaded. It has
no conflict with the early kdump.

Early kdump puts the pre-built kernel and initramfs for kdump into
the initramfs for boot, the rebuilt initramfs will become large.

By the way, we move some common functions from kdumpctl to
kdump-lib.sh. In addition, early kdump doesn't support fadump.

Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt;
---
 dracut-early-kdump-module-setup.sh |  23 +++++
 dracut-early-kdump.service         |  24 +++++
 dracut-early-kdump.sh              | 138 +++++++++++++++++++++++++++++
 early-kdump-howto.txt              |  58 ++++++++++++
 kdump-lib.sh                       | 123 ++++++++++++++++++++++++++
 kdump.sysconfig                    |   3 +
 kdump.sysconfig.i386               |   3 +
 kdump.sysconfig.ppc64              |   3 +
 kdump.sysconfig.ppc64le            |   3 +
 kdump.sysconfig.s390x              |   3 +
 kdump.sysconfig.x86_64             |   3 +
 kdumpctl                           | 177 +++++++++++--------------------------
 kexec-tools.spec                   |  13 +++
 mkdumprd.8                         |   3 +
 14 files changed, 454 insertions(+), 123 deletions(-)
 create mode 100755 dracut-early-kdump-module-setup.sh
 create mode 100644 dracut-early-kdump.service
 create mode 100755 dracut-early-kdump.sh
 create mode 100644 early-kdump-howto.txt

diff --git a/dracut-early-kdump-module-setup.sh b/dracut-early-kdump-module-setup.sh
new file mode 100755
index 0000000..bc4d7dc
--- /dev/null
+++ b/dracut-early-kdump-module-setup.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+check() {
+    if [ ! -f /etc/sysconfig/kdump ] || [ ! -f /lib/kdump/kdump-lib.sh ]
+    then
+        return 1
+    fi
+    return 0
+}
+
+depends() {
+    echo "base shutdown"
+    return 0
+}
+
+install() {
+    inst_simple "/etc/sysconfig/kdump" "/etc/sysconfig/kdump"
+    inst_simple "/usr/sbin/kexec" "/usr/sbin/kexec"
+    inst_script "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
+    inst_script "$moddir/early-kdump.sh" "/usr/bin/early-kdump"
+    inst_simple "$moddir/early-kdump.service"
"${systemdsystemunitdir}/early-kdump.service"
+    ln_r "${systemdsystemunitdir}/early-kdump.service"
"${systemdsystemunitdir}/initrd.target.wants/early-kdump.service"
+}
diff --git a/dracut-early-kdump.service b/dracut-early-kdump.service
new file mode 100644
index 0000000..8282c49
--- /dev/null
+++ b/dracut-early-kdump.service
@@ -0,0 +1,24 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+# See systemd.special(7) for details
+
+[Unit]
+Description=early kdump
+DefaultDependencies=yes
+After=dracut-cmdline.service
+Before=dracut-pre-mount.service
+
+[Service]
+Environment=DRACUT_SYSTEMD=1
+Type=oneshot
+ExecStart=/bin/early-kdump
+KillMode=process
+
+#Bash ignore SIGTERM, so we send SIGHUP instead, to ensure that bash
+#terminates cleanly.
+KillSignal=SIGHUP
diff --git a/dracut-early-kdump.sh b/dracut-early-kdump.sh
new file mode 100755
index 0000000..067ad5c
--- /dev/null
+++ b/dracut-early-kdump.sh
@@ -0,0 +1,138 @@
+#! /bin/sh
+
+KEXEC=/sbin/kexec
+standard_kexec_args="-p"
+
+EARLY_KDUMP_INITRD=""
+EARLY_KDUMP_KERNEL=""
+EARLY_KDUMP_CMDLINE=""
+EARLY_KDUMP_KERNELVER=""
+EARLY_KEXEC_ARGS=""
+
+#source lib and configure
+. /lib/dracut-lib.sh
+. /lib/kdump-lib.sh
+. /etc/sysconfig/kdump
+
+prepare_parameters()
+{
+    local cmdline id
+
+    if [ -z "$EARLY_KDUMP_CMDLINE" ]; then
+        cmdline=$(cat /proc/cmdline)
+    else
+        cmdline=${EARLY_KDUMP_CMDLINE}
+    fi
+
+    cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
+    cmdline=$(remove_cmdline_param "$cmdline" ${KDUMP_COMMANDLINE_REMOVE})
+
+    # Always remove "root=X", as we now explicitly generate all kinds
+    # of dump target mount information including root fs.
+    #
+    # We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
+    # about it(e.g. for debug purpose), then can pass "root=X" using
+    # KDUMP_COMMANDLINE_APPEND.
+    cmdline=$(remove_cmdline_param "$cmdline" root)
+
+    # With the help of "--hostonly-cmdline", we can avoid some interitage.
+    cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid
rd.md.uuid fcoe)
+    cmdline="${cmdline} ${KDUMP_COMMANDLINE_APPEND}"
+    id=$(get_bootcpu_apicid)
+    if [ ! -z ${id} ] ; then
+        cmdline=$(append_cmdline "${cmdline}" disable_cpu_apicid ${id})
+    fi
+    EARLY_KDUMP_CMDLINE=$cmdline
+
+    if [ -z "$KDUMP_BOOTDIR" ]; then
+        if ! is_atomic || [ "$(uname -m)" = "s390x" ]; then
+                KDUMP_BOOTDIR="/boot"
+        else
+                eval $(cat /proc/cmdline| grep "BOOT_IMAGE" | cut -d' '
-f1)
+                KDUMP_BOOTDIR="/boot"$(dirname $BOOT_IMAGE)
+        fi
+    fi
+
+    #make early-kdump kernel string
+    if [ -z "$EARLY_KDUMP_KERNELVER" ]; then
+        EARLY_KDUMP_KERNELVER=`uname -r`
+    fi
+   
EARLY_KDUMP_KERNEL="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${EARLY_KDUMP_KERNELVER}${KDUMP_IMG_EXT}"
+
+    #make early-kdump initrd string
+   
EARLY_KDUMP_INITRD="${KDUMP_BOOTDIR}/initramfs-${EARLY_KDUMP_KERNELVER}kdump.img"
+}
+
+early_kdump_load()
+{
+    check_kdump_feasibility
+    if [ $? -ne 0 ]; then
+        return 1
+    fi
+
+    if is_fadump_capable; then
+        echo "early kdump doesn't support fadump: [WARNING]"
+        return 1
+    fi
+
+    check_current_kdump_status
+    if [ $? == 0 ]; then
+        return 1
+    fi
+
+    prepare_parameters
+
+    ARCH=`uname -m`
+    if [ "$ARCH" == "i686" -o "$ARCH" == "i386"
]
+    then
+        need_64bit_headers
+        if [ $? == 1 ]
+        then
+            FOUND_ELF_ARGS=`echo $EARLY_KEXEC_ARGS | grep elf32-core-headers`
+            if [ -n "$FOUND_ELF_ARGS" ]
+            then
+                echo -n "Warning: elf32-core-headers overrides correct elf64
setting"
+                echo
+            else
+                EARLY_KEXEC_ARGS="$EARLY_KEXEC_ARGS --elf64-core-headers"
+            fi
+        else
+            FOUND_ELF_ARGS=`echo $EARLY_KEXEC_ARGS | grep elf64-core-headers`
+            if [ -z "$FOUND_ELF_ARGS" ]
+            then
+                EARLY_KEXEC_ARGS="$EARLY_KEXEC_ARGS --elf32-core-headers"
+            fi
+        fi
+    fi
+
+    #secure boot
+    if is_secure_boot_enforced; then
+        echo "Secure Boot is enabled. Using kexec file based syscall."
+        EARLY_KEXEC_ARGS="$EARLY_KEXEC_ARGS -s"
+    fi
+
+    $KEXEC ${EARLY_KEXEC_ARGS} $standard_kexec_args \
+        --command-line="$EARLY_KDUMP_CMDLINE" \
+        --initrd=$EARLY_KDUMP_INITRD $EARLY_KDUMP_KERNEL
+    if [ $? == 0 ]; then
+        echo "kexec: loaded early-kdump kernel"
+        return 0
+    else
+        echo "kexec: failed to load early-kdump kernel"
+        return 1
+    fi
+}
+
+setearlykdump()
+{
+    if getargbool 0 rd.early-kdump; then
+        echo "early-kdump is enabled."
+        early_kdump_load
+    else
+        echo "early-kdump is not enabled by default."
+    fi
+
+    return 0
+}
+
+setearlykdump
diff --git a/early-kdump-howto.txt b/early-kdump-howto.txt
new file mode 100644
index 0000000..aae8d7b
--- /dev/null
+++ b/early-kdump-howto.txt
@@ -0,0 +1,58 @@
+Early Kdump HOWTO
+
+Introduction
+
+Kdump service runs too late, so early crashes will have no chance to get kdump
+kernel booting. A proposal is add a dracut module to load pre-built kernel and
+initramfs for early kdump, one can provide "rd.early-kdump" in grub
commandline
+to enable, then the service can load those files like original kdump, which is
+disabled by default.
+
+For the normal kdump service in real root init path, it can check whether the
+prebuilt kernel and initramfs have been loaded. It has no conflict with the early
+kdump.
+
+How to configure early kdump:
+
+We assume if you're reading this document, you should already have kexec-tools
+installed. If not, you install it via the following command:
+
+    # yum install kexec-tools
+
+For early kdump, you can set "EARLY_KDUMP_SUPPORT=yes" in /etc/sysconfig/kdump
+if you want to rebuild the initramfs for early kdump, and then:
+    # kdumpctl restart
+
+By the way, the initramfs will become large, early kdump put the kernel and
+initramfs for kdump into the initramfs for boot. If you set "EARLY_KDUMP_SUPPORT
+=no" in /etc/sysconfig/kdump, which will restore previous initramfs, that is to
+say, it doesn't have early kdump.
+
+
+Next up, we need to modify some boot parameters to enable early kdump, it's
+very easy to append "rd.early-kdump" to your kernel boot parameters in grub.
+After making said changes, reboot your system to take effect. Of course, if
+you want to disable early kdump, you can simply remove "rd.early-kdump" from
+kernel boot parameters in grub, and reboot system like above.
+
+Now that you've got some messages about early kdump, you can check whether early
+kdump is successful like this:
+
+    # journalctl -x|grep early-kdump
+
+Then, you will see some useful logs, for exapmles:
+
+1. if early kdump is successful.
+Mar 09 09:57:56 localhost.localdomain early-kdump[477]: early-kdump is enabled.
+Mar 09 09:57:56 localhost.localdomain early-kdump[477]: kexec: loaded early-
+kdump kernel
+
+2. if early kdump is disabled.
+Mar 09 10:02:47 localhost.localdomain early-kdump[474]: early-kdump is not en-
+abled by default.
+
+Notes:
+You will need to make sure that appropriate initramfs and vmlinuz, if early kdump
+doesn't find them it will refuse to go on.
+
+In addition, early kdump doesn't support fadump, maybe it will have this in future.
diff --git a/kdump-lib.sh b/kdump-lib.sh
index d981c4f..a1a7660 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -485,3 +485,126 @@ get_dracut_args_target()
 {
     echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut
-d' ' -f1
 }
+
+check_crash_mem_reserved()
+{
+        local mem_reserved
+
+        mem_reserved=$(cat /sys/kernel/kexec_crash_size)
+        if [ $mem_reserved -eq 0 ]; then
+                echo "No memory reserved for crash kernel"
+                return 1
+        fi
+
+        return 0
+}
+
+check_kdump_feasibility()
+{
+        if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
+                echo "Kdump is not supported on this kernel"
+                return 1
+        fi
+        check_crash_mem_reserved
+        return $?
+}
+
+check_current_kdump_status()
+{
+        if [ ! -f /sys/kernel/kexec_crash_loaded ];then
+                echo "Perhaps CONFIG_CRASH_DUMP is not enabled in kernel"
+                return 1
+        fi
+
+        rc=`cat /sys/kernel/kexec_crash_loaded`
+        if [ $rc == 1 ]; then
+                return 0
+        else
+                return 1
+        fi
+}
+
+# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ...
[<paramN>]
+# Remove a list of kernel parameters from a given kernel cmdline and print the result.
+# For each "arg" in the removing params list, "arg" and
"arg=xxx" will be removed if exists.
+remove_cmdline_param()
+{
+        local cmdline=$1
+        shift
+
+        for arg in $@; do
+                cmdline=`echo $cmdline | \
+                         sed -e "s/\b$arg=[^ ]*//g" \
+                             -e "s/^$arg\b//g" \
+                             -e "s/[[:space:]]$arg\b//g" \
+                             -e "s/\s\+/ /g"`
+        done
+        echo $cmdline
+}
+
+#
+# This function returns the "apicid" of the boot
+# cpu (cpu 0) if present.
+#
+get_bootcpu_apicid()
+{
+    awk '                                                       \
+        BEGIN { CPU = "-1"; }                                   \
+        $1=="processor" && $2==":"      { CPU = $NF; }       
  \
+        CPU=="0" && /^apicid/           { print $NF; }          \
+        '                                                       \
+        /proc/cpuinfo
+}
+
+#
+# This function appends argument "$2=$3" to string ($1) if not already
present.
+#
+append_cmdline()
+{
+        local cmdline=$1
+        local newstr=${cmdline/$2/""}
+
+        # unchanged str implies argument wasn't there
+        if [ "$cmdline" == "$newstr" ]; then
+                cmdline="${cmdline} ${2}=${3}"
+        fi
+
+        echo $cmdline
+}
+
+# This function check iomem and determines if we have more than
+# 4GB of ram available. Returns 1 if we do, 0 if we dont
+need_64bit_headers()
+{
+        return `tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); \
+        print (strtonum("0x" r[2]) > strtonum("0xffffffff"));
}'`
+}
+
+# Check if secure boot is being enforced.
+#
+# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
+# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
+# bytes are the attributes associated with the variable and can safely be
+# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
+# is 1 and SetupMode is 0, then secure boot is being enforced.
+#
+# Assume efivars is mounted at /sys/firmware/efi/efivars.
+is_secure_boot_enforced()
+{
+        local secure_boot_file setup_mode_file
+        local secure_boot_byte setup_mode_byte
+
+        secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-*
2>/dev/null)
+        setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-*
2>/dev/null)
+
+        if [ -f "$secure_boot_file" ] && [ -f
"$setup_mode_file" ]; then
+                secure_boot_byte=$(hexdump -v -e '/1 "%d\ "'
$secure_boot_file|cut -d' ' -f 5)
+                setup_mode_byte=$(hexdump -v -e '/1 "%d\ "'
$setup_mode_file|cut -d' ' -f 5)
+
+                if [ "$secure_boot_byte" = "1" ] && [
"$setup_mode_byte" = "0" ]; then
+                        return 0
+                fi
+        fi
+
+        return 1
+}
diff --git a/kdump.sysconfig b/kdump.sysconfig
index ffe1df8..b95807c 100644
--- a/kdump.sysconfig
+++ b/kdump.sysconfig
@@ -35,3 +35,6 @@ KEXEC_ARGS=""
 
 #What is the image type used for kdump
 KDUMP_IMG="vmlinuz"
+
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
diff --git a/kdump.sysconfig.i386 b/kdump.sysconfig.i386
index 18c407e..6ece161 100644
--- a/kdump.sysconfig.i386
+++ b/kdump.sysconfig.i386
@@ -38,3 +38,6 @@ KDUMP_IMG="vmlinuz"
 
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
+
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
diff --git a/kdump.sysconfig.ppc64 b/kdump.sysconfig.ppc64
index be8e794..ac1ae2d 100644
--- a/kdump.sysconfig.ppc64
+++ b/kdump.sysconfig.ppc64
@@ -39,4 +39,7 @@ KDUMP_IMG="vmlinuz"
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
 
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
+
 #Specify the action after failure
diff --git a/kdump.sysconfig.ppc64le b/kdump.sysconfig.ppc64le
index be8e794..ac1ae2d 100644
--- a/kdump.sysconfig.ppc64le
+++ b/kdump.sysconfig.ppc64le
@@ -39,4 +39,7 @@ KDUMP_IMG="vmlinuz"
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
 
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
+
 #Specify the action after failure
diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
index b3aec3c..f4e63a5 100644
--- a/kdump.sysconfig.s390x
+++ b/kdump.sysconfig.s390x
@@ -41,3 +41,6 @@ KDUMP_IMG="vmlinuz"
 
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
+
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
diff --git a/kdump.sysconfig.x86_64 b/kdump.sysconfig.x86_64
index f269d02..418b240 100644
--- a/kdump.sysconfig.x86_64
+++ b/kdump.sysconfig.x86_64
@@ -38,3 +38,6 @@ KDUMP_IMG="vmlinuz"
 
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
+
+#early kdump support
+EARLY_KDUMP_SUPPORT=""
diff --git a/kdumpctl b/kdumpctl
index 4280e7e..d6fc12a 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -10,6 +10,7 @@ DRACUT_MODULES_FILE="/usr/lib/dracut/modules.txt"
 SAVE_PATH=/var/crash
 SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
 INITRD_CHECKSUM_LOCATION="/boot/.fadump_initrd_checksum"
+INITRD_CHECKSUM_EARLYKDUMP="/boot/.earlykdump_initrd_checksum"
 DUMP_TARGET=""
 DEFAULT_INITRD=""
 DEFAULT_INITRD_BAK=""
@@ -62,54 +63,6 @@ determine_dump_mode()
 	fi
 }
 
-# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ...
[<paramN>]
-# Remove a list of kernel parameters from a given kernel cmdline and print the result.
-# For each "arg" in the removing params list, "arg" and
"arg=xxx" will be removed if exists.
-remove_cmdline_param()
-{
-	local cmdline=$1
-	shift
-
-	for arg in $@; do
-		cmdline=`echo $cmdline | \
-			 sed -e "s/\b$arg=[^ ]*//g" \
-			     -e "s/^$arg\b//g" \
-			     -e "s/[[:space:]]$arg\b//g" \
-			     -e "s/\s\+/ /g"`
-	done
-	echo $cmdline
-}
-
-#
-# This function returns the "apicid" of the boot
-# cpu (cpu 0) if present.
-#
-get_bootcpu_apicid()
-{
-    awk '							\
-	BEGIN { CPU = "-1"; }					\
-	$1=="processor" && $2==":"	{ CPU = $NF; }		\
-	CPU=="0" && /^apicid/		{ print $NF; }		\
-	'							\
-	/proc/cpuinfo
-}
-
-#
-# This function appends argument "$2=$3" to string ($1) if not already
present.
-#
-append_cmdline()
-{
-	local cmdline=$1
-	local newstr=${cmdline/$2/""}
-
-	# unchanged str implies argument wasn't there
-	if [ "$cmdline" == "$newstr" ]; then
-		cmdline="${cmdline} ${2}=${3}"
-	fi
-
-	echo $cmdline
-}
-
 # This function performs a series of edits on the command line.
 # Store the final result in global $KDUMP_COMMANDLINE.
 prepare_cmdline()
@@ -208,6 +161,53 @@ rebuild_kdump_initrd()
 	return 0
 }
 
+restore_default_initramfs()
+{
+    if [ -f ${DEFAULT_INITRD_BAK} ] && [ -f ${INITRD_CHECKSUM_EARLYKDUMP} ];
then
+        # verify checksum before restoring
+        backup_checksum=`sha1sum ${DEFAULT_INITRD_BAK} | awk '{ print $1 }'`
+        default_checksum=`cat ${INITRD_CHECKSUM_EARLYKDUMP} | awk '{ print $1
}'`
+        if [ "${default_checksum}" != "${backup_checksum}" ]; then
+            echo "WARNING: checksum mismatch! Can't restore original
initrd..."
+        else
+            rm -f ${INITRD_CHECKSUM_EARLYKDUMP}
+            mv ${DEFAULT_INITRD_BAK} ${DEFAULT_INITRD}
+            if [[ $? -eq 0 ]]; then
+                echo "Restored original initrd."
+                sync
+            fi
+        fi
+    fi
+}
+
+rebuild_early_kdump_initrd()
+{
+    if [ ! -f "${DEFAULT_INITRD_BAK}" ]; then
+        if [ ! -f "${DEFAULT_INITRD}" ]; then
+            echo "${DEFAULT_INITRD} is not exist."
+            return 1
+        fi
+        echo "early kdump is backing up ${DEFAULT_INITRD} ..."
+        sha1sum ${DEFAULT_INITRD} > ${INITRD_CHECKSUM_EARLYKDUMP}
+        cp ${DEFAULT_INITRD} ${DEFAULT_INITRD_BAK}
+        if [ $? -ne 0 ]; then
+            echo "WARNING: failed to backup ${DEFAULT_INITRD} in early kdump."
+            rm -f ${DEFAULT_INITRD_BAK}
+            return 1
+        fi
+        sync
+    fi
+
+    dracut -I ${kdump_kernel} -I ${TARGET_INITRD} -v ${DEFAULT_INITRD} --force
+    if [ $? != 0 ]; then
+        echo "dracut: failed to make early kdump initrd" >&2
+        restore_default_initramfs
+        return 1
+    fi
+
+    return 0
+}
+
 rebuild_initrd()
 {
 	if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
@@ -610,6 +610,12 @@ check_rebuild()
 		return 1
 	fi
 
+	if [[ $EARLY_KDUMP_SUPPORT = "yes" ]]; then
+		rebuild_early_kdump_initrd
+	elif [[ $EARLY_KDUMP_SUPPORT = "no" ]]; then
+		restore_default_initramfs
+	fi
+
 	_force_no_rebuild=`grep ^force_no_rebuild $KDUMP_CONFIG_FILE 2>/dev/null`
 	if [ $? -eq 0 ]; then
 		force_no_rebuild=`echo $_force_no_rebuild | cut -d' '  -f2`
@@ -686,14 +692,6 @@ check_rebuild()
 	return $?
 }
 
-# This function check iomem and determines if we have more than
-# 4GB of ram available. Returns 1 if we do, 0 if we dont
-need_64bit_headers()
-{
-	return `tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); \
-	print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }'`
-}
-
 # Load the kdump kernel specified in /etc/sysconfig/kdump
 # If none is specified, try to load a kdump kernel with the same version
 # as the currently running kernel.
@@ -850,21 +848,6 @@ check_current_fadump_status()
 	return 1
 }
 
-check_current_kdump_status()
-{
-	if [ ! -f /sys/kernel/kexec_crash_loaded ];then
-		echo "Perhaps CONFIG_CRASH_DUMP is not enabled in kernel"
-		return 1
-	fi
-
-	rc=`cat /sys/kernel/kexec_crash_loaded`
-	if [ $rc == 1 ]; then
-		return 0
-	else
-		return 1
-	fi
-}
-
 check_current_status()
 {
 	if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
@@ -974,58 +957,6 @@ selinux_relabel()
 	done
 }
 
-# Check if secure boot is being enforced.
-#
-# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
-# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
-# bytes are the attributes associated with the variable and can safely be
-# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
-# is 1 and SetupMode is 0, then secure boot is being enforced.
-#
-# Assume efivars is mounted at /sys/firmware/efi/efivars.
-is_secure_boot_enforced()
-{
-	local secure_boot_file setup_mode_file
-	local secure_boot_byte setup_mode_byte
-
-	secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-* 2>/dev/null)
-	setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-* 2>/dev/null)
-
-	if [ -f "$secure_boot_file" ] && [ -f "$setup_mode_file" ];
then
-		secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' $secure_boot_file|cut
-d' ' -f 5)
-		setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' $setup_mode_file|cut
-d' ' -f 5)
-
-		if [ "$secure_boot_byte" = "1" ] && [
"$setup_mode_byte" = "0" ]; then
-			return 0
-		fi
-	fi
-
-	return 1
-}
-
-check_crash_mem_reserved()
-{
-	local mem_reserved
-
-	mem_reserved=$(cat /sys/kernel/kexec_crash_size)
-	if [ $mem_reserved -eq 0 ]; then
-		echo "No memory reserved for crash kernel"
-		return 1
-	fi
-
-	return 0
-}
-
-check_kdump_feasibility()
-{
-	if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
-		echo "Kdump is not supported on this kernel"
-		return 1
-	fi
-	check_crash_mem_reserved
-	return $?
-}
-
 check_fence_kdump_config()
 {
 	local hostname=`hostname`
diff --git a/kexec-tools.spec b/kexec-tools.spec
index f04527c..9ecaefd 100644
--- a/kexec-tools.spec
+++ b/kexec-tools.spec
@@ -29,6 +29,7 @@ Source24: kdump-lib-initramfs.sh
 Source25: kdump.sysconfig.ppc64le
 Source26: kdumpctl.8
 Source27: live-image-kdump-howto.txt
+Source28: early-kdump-howto.txt
 
 #######################################
 # These are sources for mkdumpramfs
@@ -42,6 +43,9 @@ Source104: dracut-kdump-emergency.service
 Source105: dracut-kdump-error-handler.service
 Source106: dracut-kdump-capture.service
 Source107: dracut-kdump-emergency.target
+Source108: dracut-early-kdump.sh
+Source109: dracut-early-kdump.service
+Source110: dracut-early-kdump-module-setup.sh
 
 Requires(post): systemd-units
 Requires(preun): systemd-units
@@ -136,6 +140,7 @@ rm -f kexec-tools.spec.in
 cp %{SOURCE10} .
 cp %{SOURCE21} .
 cp %{SOURCE27} .
+cp %{SOURCE28} .
 
 make
 %ifarch %{ix86} x86_64 ppc64 s390x ppc64le aarch64
@@ -194,6 +199,7 @@ make -C kdump-anaconda-addon install DESTDIR=$RPM_BUILD_ROOT
 %find_lang kdump-anaconda-addon
 
 %define remove_dracut_prefix() %(echo -n %1|sed 's/.*dracut-//g')
+%define remove_dracut_early_kdump_prefix() %(echo -n %1|sed
's/.*dracut-early-kdump-//g')
 
 # deal with dracut modules
 mkdir -p -m755 $RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99kdumpbase
@@ -207,6 +213,12 @@ cp %{SOURCE106}
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99kdumpb
 cp %{SOURCE107}
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99kdumpbase/%{remove_dracut_prefix
%{SOURCE107}}
 chmod 755
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99kdumpbase/%{remove_dracut_prefix
%{SOURCE100}}
 chmod 755
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99kdumpbase/%{remove_dracut_prefix
%{SOURCE101}}
+mkdir -p -m755 $RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump
+cp %{SOURCE108}
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump/%{remove_dracut_prefix
%{SOURCE108}}
+cp %{SOURCE109}
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump/%{remove_dracut_prefix
%{SOURCE109}}
+cp %{SOURCE110}
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump/%{remove_dracut_early_kdump_prefix
%{SOURCE110}}
+chmod 755
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump/%{remove_dracut_prefix
%{SOURCE108}}
+chmod 755
$RPM_BUILD_ROOT/etc/kdump-adv-conf/kdump_dracut_modules/99earlykdump/%{remove_dracut_early_kdump_prefix
%{SOURCE110}}
 
 
 %define dracutlibdir %{_prefix}/lib/dracut
@@ -305,6 +317,7 @@ done
 %license COPYING
 %doc TODO
 %doc kexec-kdump-howto.txt
+%doc early-kdump-howto.txt
 %doc kdump-in-cluster-environment.txt
 %doc live-image-kdump-howto.txt
 %ifarch %{ix86} x86_64 ppc64 s390x ppc64le aarch64
diff --git a/mkdumprd.8 b/mkdumprd.8
index 7faae57..6e22e0a 100644
--- a/mkdumprd.8
+++ b/mkdumprd.8
@@ -17,6 +17,9 @@ be loaded in the initramfs (based on configuration retrieved from
 \fBmkdumprd\fR add a new \fBdracut\fR module 99kdumpbase and use \fBdracut\fR
 utility to generate the initramfs.
 
+\fBmkdumprd\fR add a new \fBdracut\fR module 99earlykdump and use \fBdracut\fR
+utility to generate the initramfs.
+
 \fBmkdumprd\fR was not intended for casual use outside of the service
 initialization script for the kdump utility, and should not be run manually.  If
 you require a custom kdump initramfs image, it is suggested that you use the
-- 
2.9.5