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kdump-systemd-integration.patch
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File kdump-systemd-integration.patch of Package kdump
From: Petr Tesarik <ptesarik@suse.cz> Date: Sun Aug 30 23:18:46 2015 +0200 Subject: Improve systemd integration References: FATE#319020 Patch-mainline: v0.8.16 Git-commit: 4d72c589ca9de7696e662f10f86d1739438ed6e1 Add a unit file for systemd. To avoid divergence between systemd and sysv scripts, the ExecStart and ExecStop actions are moved to individual scripts under /lib/kdump and used by both implementations. As a side effect, rc.kdump.functions is no longer used. Signed-off-by: Petr Tesarik <ptesarik@suse.com> --- init/CMakeLists.txt | 14 +- init/boot.kdump | 55 ++++++-- init/kdump.service | 12 + init/load.sh | 294 +++++++++++++++++++++++++++++++++++++++++++ init/mkdumprd | 8 - init/rc.kdump.functions | 326 ------------------------------------------------ init/unload.sh | 24 +++ 7 files changed, 384 insertions(+), 349 deletions(-) --- a/init/CMakeLists.txt +++ b/init/CMakeLists.txt @@ -30,6 +30,17 @@ INSTALL( INSTALL( FILES + ${CMAKE_CURRENT_SOURCE_DIR}/kdump.service + DESTINATION + /usr/lib/systemd/system + PERMISSIONS + OWNER_READ OWNER_WRITE + GROUP_READ + WORLD_READ +) + +INSTALL( + FILES ${CMAKE_CURRENT_SOURCE_DIR}/setup-mkdumprd.sh ${CMAKE_CURRENT_SOURCE_DIR}/setup-kdumpfs.sh ${CMAKE_CURRENT_SOURCE_DIR}/setup-kdump.sh @@ -56,9 +67,10 @@ INSTALL( INSTALL( FILES - ${CMAKE_CURRENT_SOURCE_DIR}/rc.kdump.functions ${CMAKE_CURRENT_SOURCE_DIR}/setup-kdump.functions ${CMAKE_CURRENT_SOURCE_DIR}/save_dump.sh + ${CMAKE_CURRENT_SOURCE_DIR}/load.sh + ${CMAKE_CURRENT_SOURCE_DIR}/unload.sh DESTINATION /lib/kdump PERMISSIONS --- a/init/boot.kdump +++ b/init/boot.kdump @@ -25,30 +25,56 @@ # Description: This script loads the kdump kernel on startup. ### END INIT INFO +KDUMPTOOL=/usr/sbin/kdumptool +LOAD_KDUMP=/lib/kdump/load.sh +UNLOAD_KDUMP=/lib/kdump/unload.sh + . /etc/rc.status -. /lib/kdump/rc.kdump.functions + +# +# Checks if currently a kdump kernel is loaded. +# +# Returns: 0 (true) if a kdump kernel is loaded, +# 1 (false) if the kdump kernel is not loaded and +# -1 (false) if the feature is not implemented (too old kernel) +function kdump_kernel_loaded() +{ + eval $($KDUMPTOOL dump_config) + if [ "$KDUMP_FADUMP" = "yes" ] ; then + if [ -r /sys/kernel/fadump_registered ] ; then + if [ $(cat /sys/kernel/fadump_registered) = "1" ] ; then + return 0 + else + return 1 + fi + else + return -1 + fi + elif [ -r /sys/kernel/kexec_crash_loaded ] ; then + if [ $(cat /sys/kernel/kexec_crash_loaded) = "1" ] ; then + return 0 + else + return 1 + fi + else + return -1 + fi +} case "$1" in start|restart|force-reload) - load_kdump + echo -n "Loading kdump" + $LOAD_KDUMP + rc_status ;; stop) if [ "$RUNLEVEL" != "" ]; then echo -n "Not unloading kdump during runlevel changes" rc_status -s else - kdump_kernel_loaded - if [ $? -ne 1 ] ; then + if kdump_kernel_loaded ; then echo -n "Unloading kdump" - if fadump_enabled; then - # The kernel fails with EINVAL if unregistered already - # (see bnc#814780) - if [ "$(cat $FADUMP_REGISTERED)" != "0" ]; then - echo 0 > $FADUMP_REGISTERED - fi - else - $KEXEC -p -u - fi + $UNLOAD_KDUMP fi rc_status -v fi @@ -71,7 +97,8 @@ case "$1" in ;; try-restart) if kdump_kernel_loaded ; then - $0 start + echo "Loading kdump" + $LOAD_KDUMP else rc_reset fi --- /dev/null +++ b/init/kdump.service @@ -0,0 +1,12 @@ +[Unit] +Description=Load kdump kernel on startup +After=local-fs.target + +[Service] +Type=oneshot +ExecStart=/lib/kdump/load.sh +ExecStop=/lib/kdump/unload.sh +RemainAfterExit=true + +[Install] +WantedBy=multi-user.target --- /dev/null +++ b/init/load.sh @@ -0,0 +1,294 @@ +#! /bin/bash +# +# Copyright Petr Tesarik <ptesarik@suse.com> +# Load the kdump kernel specified in /etc/sysconfig/kdump + +KDUMPTOOL=/usr/sbin/kdumptool +KEXEC=/sbin/kexec +EFI_SYSTAB=/sys/firmware/efi/systab +FADUMP_ENABLED=/sys/kernel/fadump_enabled +FADUMP_REGISTERED=/sys/kernel/fadump_registered + +# +# Remove an option from the kernel command line +function remove_from_commandline() +{ + local option="$1" + + awk 'BEGIN { ORS="" } + { + while(length()) { + sub(/^[[:space:]]+/,""); + pstart=match($0,/("[^"]*"?|[^"[:space:]])+/); + plength=RLENGTH; + param=substr($0,pstart,plength); + raw=param; + gsub(/"/,"",raw); + if (raw !~ /^('"$option"')(=|$)/) + print param " "; + $0=substr($0,pstart+plength); + } + print "\n"; + }' +} + +# +# Get the name of kernel parameter to limit CPUs +# Linux 2.6.34+ has nr_cpus, older versions must use maxcpus +function cpus_param() +{ + # nr_cpus does not work properly on ppc/ppc64/ppc64le + case $(uname -m) in + ppc*) + echo maxcpus + return 0 + ;; + esac + + local version=$(get_kernel_version "$1") + version="${version%%-*}" + local verhex=$(IFS=. ; set -- $version ; printf "0x%02x%02x%02x" $1 $2 $3) + if [ $(( $verhex )) -ge $(( 0x020622 )) ] ; then + echo nr_cpus + else + echo maxcpus + fi +} + +# +# Builds the kdump command line from KDUMP_COMMANDLINE. +function build_kdump_commandline() +{ + local kdump_kernel="$1" + local commandline="$KDUMP_COMMANDLINE" + + if [ -z "$commandline" ] ; then + local nr_cpus=$(cpus_param "$kdump_kernel") + commandline=$( + remove_from_commandline \ + 'root|resume|crashkernel|splash|mem|BOOT_IMAGE|showopts|zfcp\.allow_lun_scan|hugepages|acpi_no_memhotplug|cgroup_disable|unknown_nmi_panic' \ + < /proc/cmdline) + # Use deadline for saving the memory footprint + commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory" + commandline="$commandline irqpoll ${nr_cpus}=${KDUMP_CPUS:-1}" + commandline="$commandline root=kdump" + case $(uname -i) in + i?86|x86_64) + local boot_apicid=$( + awk -F':[ \t]' '/^initial apicid[ \t]*:/ {print $2; exit}' \ + /proc/cpuinfo) + test -n "$boot_apicid" && \ + commandline="$commandline disable_cpu_apicid=$boot_apicid" + commandline=$(echo "$commandline" | + remove_from_commandline 'unknown_nmi_panic') + ;; + s390*) + commandline="$commandline zfcp.allow_lun_scan=0" + ;; + esac + + # Xen does not include the kernel release in VMCOREINFO_XEN + # so we have to pass it via the command line + if [[ $(uname -r) =~ -xen$ ]] ; then + kernelrelease=$(uname -r) + commandline="$commandline kernelversion=$kernelrelease" + fi + + if [ -f /sys/firmware/efi/systab ] ; then + local acpi_addr + if grep -q '^ACPI20=' /sys/firmware/efi/systab ; then + acpi_addr=$(awk -F'=' '/^ACPI20=/ {print $2}' "$EFI_SYSTAB") + else + acpi_addr=$(awk -F'=' '/^ACPI=/ {print $2}' "$EFI_SYSTAB") + fi + commandline="$commandline noefi acpi_rsdp=$acpi_addr" + fi + fi + + commandline="$commandline $KDUMP_COMMANDLINE_APPEND" + + # Add panic=1 unless there is a panic option already + local cmdline_nopanic + cmdline_nopanic=$(echo "$commandline" | remove_from_commandline 'panic') + if [ "$commandline" = "$cmdline_nopanic" ] ; then + commandline="$commandline panic=1" + fi + + echo "$commandline" +} + +# +# Builds the kexec options from KEXEC_OPTIONS +# Parameters: 1) kernel +function build_kexec_options() +{ + local kdump_kernel="$1" + local options="$KEXEC_OPTIONS" + + # remove `--args-linux' for x86 type kernel files here + if [ $($KDUMPTOOL identify_kernel -t "$kdump_kernel") = "x86" ] ; then + options=$(echo "$options" | sed -e 's/--args-linux//g') + fi + + # add --noio on ia64 + if [ $(uname -i) = "ia64" ] ; then + options="$options --noio" + fi + + echo "$options" +} + +# +# Load kdump using kexec +function load_kdump_kexec() +{ + local result + + if [ ! -f "$kdump_initrd" ] ; then + echo "No kdump initial ramdisk found. Tried to locate $kdump_initrd." + return 6 + fi + + local kdump_commandline=$(build_kdump_commandline "$kdump_kernel") + local kexec_options=$(build_kexec_options "$kdump_kernel") + + KEXEC_CALL="$KEXEC -p $kdump_kernel --append=\"$kdump_commandline\"" + KEXEC_CALL="$KEXEC_CALL --initrd=$kdump_initrd $kexec_options" + + if [ $((${KDUMP_VERBOSE:-0} & 4)) -gt 0 ] ; then + echo "Loading kdump kernel: $KEXEC_CALL" + fi + + local output=$(eval "$KEXEC_CALL" 2>&1) + if [ $? -eq 0 ] ; then + result=0 + else + result=1 + fi + + # print stderr in any case to show warnings that normally + # would be supressed (bnc#374185) + echo -n "$output" + + if [ $((${KDUMP_VERBOSE:-0} & 1)) -gt 0 ] ; then + if [ $result -eq 0 ] ; then + logger -i -t kdump \ + "Loaded kdump kernel: $KEXEC_CALL, Result: $output" + else + logger -i -t kdump \ + "FAILED to load kdump kernel: $KEXEC_CALL, Result: $output" + fi + fi + + return $result +} + +# +# Checks if fadump is enabled +# +# Returns: 0 (true) if fadump is enabled +# 1 (false) if fadump is not availabled or disabled +function fadump_enabled() +{ + test -f "$FADUMP_ENABLED" && test $(cat "$FADUMP_ENABLED") = "1" +} + +# +# Update the bootloader options for fadump +function fadump_bootloader() +{ + case $(uname -m) in + ppc*) ;; + *) return 0 ;; + esac + + local newstate="$1" + + # check if the old configuration is still valid + boot_opts=$(kdump-bootloader.pl --get) + nofadump_opts=$(echo "$boot_opts" | remove_from_commandline 'fadump') + old_opts=$($KDUMPTOOL -F /dev/null -C <(echo "$boot_opts") \ + dump_config --usage dump --format kernel --nodefault) + if [ "$newstate" = on ] ; then + curr_opts=$($KDUMPTOOL dump_config --usage dump --format kernel --nodefault) + if [ "$old_opts" != "$curr_opts" -o \ + "$boot_opts" = "$nofadump_opts" ] ; then + kdump-bootloader.pl --update fadump=on "$curr_opts" + fi + elif [ "$boot_opts" != "$nofadump_opts" ] ; then + kdump-bootloader.pl --update + fi +} + +# +# Update fadump configuration +function load_kdump_fadump() +{ + fadump_bootloader on + + if ! fadump_enabled ; then + echo "fadump is not enabled in the kernel." + return 5 + fi + + # The kernel fails with EINVAL if registered already + # (see bnc#814780) + if [ $(cat "$FADUMP_REGISTERED") != "1" ] ; then + echo 1 > "$FADUMP_REGISTERED" + fi + + return 0 +} + +# +# Find the desired kernel and initrd +function find_kernel() +{ + local output=$($KDUMPTOOL find_kernel) + test $? -eq 0 || return 1 + + kdump_kernel=$(echo "$output" | grep ^Kernel | cut -f 2) + kdump_initrd=$(echo "$output" | grep ^Initrd | cut -f 2) + + return 0 +} + +# +# Rebuild the kdump initramfs if necessary +function rebuild_kdumprd() +{ + local output=$(mkdumprd -K "$kdump_kernel" -I "$kdump_initrd" 2>&1) + if [ $? -ne 0 ] ; then + echo "$output" + return 1 + fi + + return 0 +} + +############################################################ +# MAIN PROGRAM STARTS HERE +# + +eval $($KDUMPTOOL dump_config) + +if [ $((${KDUMP_VERBOSE:-0} & 16)) -gt 0 ] ; then + KDUMPTOOL="$KDUMPTOOL -D" +fi + +find_kernel || exit 6 +rebuild_kdumprd || exit 1 + +if [ "$KDUMP_FADUMP" = "yes" ] ; then + load_kdump_fadump +else + fadump_bootloader off + load_kdump_kexec +fi +result=$? + +if [ $result = 0 ] ; then + echo 1 > /proc/sys/kernel/panic_on_oops +fi + +exit $result --- a/init/mkdumprd +++ b/init/mkdumprd @@ -15,7 +15,6 @@ # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. -. /lib/kdump/rc.kdump.functions . /lib/kdump/setup-kdump.functions kdump_get_config || return 1 @@ -230,13 +229,6 @@ if (( ! $FORCE )) ; then fi fi -# Update the bootloader if necessary -if [ "$KDUMP_FADUMP" != "yes" ]; then - fadump_bootloader off -else - fadump_bootloader on -fi - if type dracut >/dev/null 2>&1 ; then run_dracut ret=$? --- a/init/rc.kdump.functions +++ /dev/null @@ -1,326 +0,0 @@ -#!/bin/sh -# -# Copyright 2005 Red Hat, Inc. -# Author: Jeff Moyer <jmoyer@redhat.com> -# Modifications for SUSE from Chris Mason <mason@suse.com> -# Takashi Iwai <tiwai@suse.de> -# Bernhard Walle <bwalle@suse.de> -# -# ---------------------------------------------------------------------- -# rc.kdump.functions by Petr Tesarik - -KDUMP_CONFIG=/etc/sysconfig/kdump -KEXEC=/sbin/kexec -FADUMP_ENABLED="/sys/kernel/fadump_enabled" -FADUMP_REGISTERED="/sys/kernel/fadump_registered" - -# -# Checks if fadump is enabled -# -# Returns: 0 (true) if fadump is enabled -# 1 (false) if fadump is not availabled or disabled -function fadump_enabled() -{ - test -f $FADUMP_ENABLED && test "$(cat $FADUMP_ENABLED)" = "1" -} - -# -# Checks if currently a kdump kernel is loaded. -# -# Returns: 0 (true) if a kdump kernel is loaded, -# 1 (false) if the kdump kernel is not loaded and -# -1 (false) if the feature is not implemented (too old kernel) -function kdump_kernel_loaded() -{ - if [ -f $FADUMP_REGISTERED ]; then - if [ "$(cat $FADUMP_REGISTERED)" = "1" ]; then - return 0 - else - return 1 - fi - fi - - if [ -r /sys/kernel/kexec_crash_loaded ]; then - if [ "$(cat /sys/kernel/kexec_crash_loaded)" = "1" ]; then - return 0 - else - return 1 - fi - else - return -1 - fi -} - -# -# Remove an option from the kernel command line -function remove_from_commandline() -{ - local option="$1" - - awk 'BEGIN { ORS="" } - { - while(length()) { - sub(/^[[:space:]]+/,""); - pstart=match($0,/("[^"]*"?|[^"[:space:]])+/); - plength=RLENGTH; - param=substr($0,pstart,plength); - raw=param; - gsub(/"/,"",raw); - if (raw !~ /^('"$option"')(=|$)/) - print param " "; - $0=substr($0,pstart+plength); - } - print "\n"; - }' -} - -# -# Get the name of kernel parameter to limit CPUs -# Linux 2.6.34+ has nr_cpus, older versions must use maxcpus -function cpus_param() -{ - # nr_cpus does not work properly on ppc/ppc64/ppc64le - case "$(uname -m)" in - ppc*) - echo maxcpus - return 0 - ;; - esac - - local version=$(get_kernel_version "$1") - version="${version%%-*}" - local verhex=$(IFS=. ; set -- $version ; printf "0x%02x%02x%02x" $1 $2 $3) - if [ $(( $verhex )) -ge $(( 0x020622 )) ] ; then - echo nr_cpus - else - echo maxcpus - fi -} - -# -# Builds the kdump command line from KDUMP_COMMANDLINE. -function build_kdump_commandline() -{ - local kdump_kernel="$1" - local commandline="$KDUMP_COMMANDLINE" - - if [ -z "$commandline" ]; then - local nr_cpus=$(cpus_param "$kdump_kernel") - commandline=$( - remove_from_commandline \ - 'root|resume|crashkernel|splash|mem|BOOT_IMAGE|showopts|zfcp\.allow_lun_scan|hugepages|acpi_no_memhotplug|cgroup_disable' \ - < /proc/cmdline) - # Use deadline for saving the memory footprint - commandline="$commandline elevator=deadline sysrq=yes reset_devices acpi_no_memhotplug cgroup_disable=memory" - commandline="$commandline irqpoll ${nr_cpus}=${KDUMP_CPUS:-1}" - commandline="$commandline root=kdump" - local arch=$(uname -i) - case "$arch" in - i?86|x86_64) - local boot_apicid=$( - awk -F':[ \t]' '/^initial apicid[ \t]*:/ {print $2; exit}' \ - /proc/cpuinfo) - test -n "$boot_apicid" && - commandline="$commandline disable_cpu_apicid=$boot_apicid" - ;; - s390*) - commandline="$commandline zfcp.allow_lun_scan=0" - ;; - esac - - # Xen does not include the kernel release in VMCOREINFO_XEN - # so we have to pass it via the command line - if [[ "$(uname -r)" =~ -xen$ ]] ; then - kernelrelease=$(uname -r) - commandline="$commandline kernelversion=$kernelrelease" - fi - - if [ -f /sys/firmware/efi/systab ] - then - local acpi_addr - if grep -q '^ACPI20=' /sys/firmware/efi/systab - then - acpi_addr=$(awk -F'=' '/^ACPI20=/ {print $2}' /sys/firmware/efi/systab) - else - acpi_addr=$(awk -F'=' '/^ACPI=/ {print $2}' /sys/firmware/efi/systab) - fi - commandline="$commandline noefi acpi_rsdp=$acpi_addr" - fi - - case `uname -i` in - i?86|x86_64) - commandline=$(echo "$commandline" | - remove_from_commandline 'unknown_nmi_panic') - ;; - esac - fi - - commandline="$commandline $KDUMP_COMMANDLINE_APPEND" - - # Add panic=1 unless there is a panic option already - local cmdline_nopanic - cmdline_nopanic=$(echo "$commandline" | remove_from_commandline panic) - if [ "$commandline" = "$cmdline_nopanic" ] - then - commandline="$commandline panic=1" - fi - - echo "$commandline" -} - -# -# Builds the kexec options from KEXEC_OPTIONS -# Parameters: 1) kernel -function build_kexec_options() -{ - local kdump_kernel=$1 - local options=$KEXEC_OPTIONS - - # remove `--args-linux' for x86 type kernel files here - if [ "$(kdumptool identify_kernel -t "$kdump_kernel")" = "x86" ] ; then - options=$(echo $options | sed -e 's/--args-linux//g') - fi - - # add --noio on ia64 - if [ "$(uname -i)" = "ia64" ] ; then - options="$options --noio" - fi - - echo "$options" -} - -# Load kdump using kexec -function load_kdump_kexec() -{ - if [ ! -f $kdump_initrd ]; then - echo -n ": No kdump initial ramdisk found." - echo "Tried to locate ${kdump_initrd}" - rc_status -s - rc_failed 6 - rc_exit - fi - - local kdump_commandline=$(build_kdump_commandline "$kdump_kernel") - local kexec_options=$(build_kexec_options "$kdump_kernel") - - KEXEC_CALL="$KEXEC -p $kdump_kernel --append=\"$kdump_commandline\"" - KEXEC_CALL="$KEXEC_CALL --initrd=$kdump_initrd $kexec_options" - - result=$(eval "$KEXEC_CALL" 2>&1) - rc_check - - # print stderr in any case to show warnings that normally - # would be supressed (bnc#374185) - echo "$result" - - if rc_status ; then - echo 1 > /proc/sys/kernel/panic_on_oops - fi - - if [ $(($KDUMP_VERBOSE & 4)) -gt 0 ] ; then - echo "Loading kdump kernel: $KEXEC_CALL" - fi - if [ $(($KDUMP_VERBOSE & 1)) -gt 0 ] ; then - if rc_status ; then - logger -i -t kdump "Loaded kdump kernel: $KEXEC_CALL, Result: $result" - else - logger -i -t kdump \ - "FAILED to load kdump kernel: $KEXEC_CALL, Result: $result" - fi - fi - -} - -# Update the bootloader options for fadump -function fadump_bootloader() -{ - case $(uname -m) in - ppc*) ;; - *) return 0 ;; - esac - - local newstate="$1" - - # check if the old configuration is still valid - boot_opts=$(kdump-bootloader.pl --get) - nofadump_opts=$(echo "$boot_opts" | remove_from_commandline 'fadump') - old_opts=$(kdumptool -F /dev/null -C <(echo "$boot_opts") \ - dump_config --usage dump --format kernel --nodefault) - if [ "$newstate" = on ]; then - curr_opts=$(kdumptool dump_config --usage dump --format kernel --nodefault) - if [ "$old_opts" != "$curr_opts" -o \ - "$boot_opts" = "$nofadump_opts" ]; then - kdump-bootloader.pl --update fadump=on "$curr_opts" - fi - elif [ "$boot_opts" != "$nofadump_opts" ]; then - kdump-bootloader.pl --update - fi -} - -# Update fadump configuration -function load_kdump_fadump() -{ - fadump_bootloader on - - if ! fadump_enabled; then - echo ": fadump is not enabled in the kernel." - rc_status -s - rc_failed 6 - rc_exit - fi - - # The kernel fails with EINVAL if registered already - # (see bnc#814780) - if [ "$(cat $FADUMP_REGISTERED)" != "1" ]; then - echo 1 > $FADUMP_REGISTERED - fi - echo 1 > /proc/sys/kernel/panic_on_oops - rc_reset -} - -# -# Load the kdump kerel specified in /etc/sysconfig/kdump -function load_kdump() -{ - echo "Loading kdump" - - if [ -f ${KDUMP_CONFIG} ] ; then - . ${KDUMP_CONFIG} - fi - - local find_kernel_args= - if [ $(($KDUMP_VERBOSE & 16)) -gt 0 ] ; then - find_kernel_args="-D" - fi - - local output=$(kdumptool $find_kernel_args find_kernel) - if [ $? -ne 0 ] ; then - rc_status -s - rc_failed 6 - rc_exit - fi - - kdump_kernel=$(echo "$output" | grep ^Kernel | cut -f 2) - kdump_initrd=$(echo "$output" | grep ^Initrd | cut -f 2) - - # rebuild the kdump initramfs if necessary, but not at boot - if [ "$RUNLEVEL" != "B" ]; then - output=$(mkdumprd -K "$kdump_kernel" -I "$kdump_initrd" 2>&1) - if [ $? -ne 0 ] ; then - echo "$output" - rc_failed - rc_status -v - rc_exit - fi - fi - - if [ "$KDUMP_FADUMP" = "yes" ]; then - load_kdump_fadump - else - load_kdump_kexec - fi - - rc_status -v -} - -# vim: set ts=4 sw=4 et: --- /dev/null +++ b/init/unload.sh @@ -0,0 +1,24 @@ +#! /bin/bash +# +# Copyright 2015 Petr Tesarik <ptesarik@suse.com> +# Unload the kdump kernel + +KDUMPTOOL=/usr/sbin/kdumptool +KEXEC=/sbin/kexec +FADUMP_REGISTERED=/sys/kernel/fadump_registered + +eval $($KDUMPTOOL dump_config) + +if [ "$KDUMP_FADUMP" = "yes" ]; then + # The kernel fails with EINVAL if unregistered already + # (see bnc#814780) + if [ $(cat "$FADUMP_REGISTERED") != "0" ] ; then + echo 0 > "$FADUMP_REGISTERED" + fi +else + $KEXEC -p -u +fi + +test $? -eq 0 || exit 1 + +exit 0
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