kexec-tools/kdumpctl

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#!/bin/bash
2011-07-06 19:25:34 +00:00
KEXEC=/sbin/kexec
KDUMP_KERNELVER=""
KDUMP_KERNEL=""
2011-07-06 19:25:34 +00:00
KDUMP_COMMANDLINE=""
KEXEC_ARGS=""
KDUMP_LOG_PATH="/var/log"
MKDUMPRD="/sbin/mkdumprd -f"
MKFADUMPRD="/sbin/mkfadumprd"
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"
DUMP_TARGET=""
DEFAULT_INITRD=""
DEFAULT_INITRD_BAK=""
KDUMP_INITRD=""
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
TARGET_INITRD=""
FADUMP_REGISTER_SYS_NODE="/sys/kernel/fadump_registered"
#kdump shall be the default dump mode
DEFAULT_DUMP_MODE="kdump"
image_time=0
2011-07-06 19:25:34 +00:00
standard_kexec_args="-d -p"
2011-07-06 19:25:34 +00:00
# Some default values in case /etc/sysconfig/kdump doesn't include
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug"
2011-07-06 19:25:34 +00:00
if [ -f /etc/sysconfig/kdump ]; then
. /etc/sysconfig/kdump
fi
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
. $dracutbasedir/dracut-functions.sh
. /lib/kdump/kdump-lib.sh
. /lib/kdump/kdump-logger.sh
#initiate the kdump logger
dlog_init
if [ $? -ne 0 ]; then
echo "failed to initiate the kdump logger."
exit 1
fi
single_instance_lock()
{
local rc timeout=5
exec 9>/var/lock/kdump
if [ $? -ne 0 ]; then
derror "Create file lock failed"
exit 1
fi
flock -n 9
rc=$?
while [ $rc -ne 0 ]; do
dinfo "Another app is currently holding the kdump lock; waiting for it to exit..."
flock -w $timeout 9
rc=$?
done
}
determine_dump_mode()
{
# Check if firmware-assisted dump is enabled
# if yes, set the dump mode as fadump
if is_fadump_capable; then
dinfo "Dump mode is fadump"
DEFAULT_DUMP_MODE="fadump"
fi
ddebug "DEFAULT_DUMP_MODE=$DEFAULT_DUMP_MODE"
}
save_core()
2011-07-06 19:25:34 +00:00
{
coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"
mkdir -p $coredir
ddebug "cp --sparse=always /proc/vmcore $coredir/vmcore-incomplete"
2011-07-06 19:25:34 +00:00
cp --sparse=always /proc/vmcore $coredir/vmcore-incomplete
if [ $? == 0 ]; then
mv $coredir/vmcore-incomplete $coredir/vmcore
dinfo "saved a vmcore to $coredir"
2011-07-06 19:25:34 +00:00
else
derror "failed to save a vmcore to $coredir"
2011-07-06 19:25:34 +00:00
fi
# pass the dmesg to Abrt tool if exists, in order
# to collect the kernel oops message.
# https://fedorahosted.org/abrt/
if [ -x /usr/bin/dumpoops ]; then
ddebug "makedumpfile --dump-dmesg $coredir/vmcore $coredir/dmesg"
2011-07-06 19:25:34 +00:00
makedumpfile --dump-dmesg $coredir/vmcore $coredir/dmesg >/dev/null 2>&1
ddebug "dumpoops -d $coredir/dmesg"
2011-07-06 19:25:34 +00:00
dumpoops -d $coredir/dmesg >/dev/null 2>&1
if [ $? == 0 ]; then
dinfo "kernel oops has been collected by abrt tool"
2011-07-06 19:25:34 +00:00
fi
fi
}
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
rebuild_fadump_initrd()
{
if ! $MKFADUMPRD "$DEFAULT_INITRD_BAK" "$TARGET_INITRD" --kver "$KDUMP_KERNELVER"; then
derror "mkfadumprd: failed to make fadump initrd"
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
return 1
fi
return 0
}
check_earlykdump_is_enabled()
{
grep -q -w "rd.earlykdump" /proc/cmdline
return $?
}
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
rebuild_kdump_initrd()
{
ddebug "rebuild kdump initrd: $MKDUMPRD $TARGET_INITRD $KDUMP_KERNELVER"
$MKDUMPRD $TARGET_INITRD $KDUMP_KERNELVER
if [ $? != 0 ]; then
derror "mkdumprd: failed to make kdump initrd"
return 1
fi
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
if check_earlykdump_is_enabled; then
dwarn "Tips: If early kdump is enabled, also require rebuilding the system initramfs to make the changes take effect for early kdump."
fi
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
return 0
}
rebuild_initrd()
{
if [[ ! -w $(dirname $TARGET_INITRD) ]];then
derror "$(dirname $TARGET_INITRD) does not have write permission. Cannot rebuild $TARGET_INITRD"
return 1
fi
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
rebuild_fadump_initrd
else
rebuild_kdump_initrd
fi
return $?
}
#$1: the files to be checked with IFS=' '
check_exist()
{
for file in $1; do
if [ ! -e "$file" ]; then
derror "Error: $file not found."
return 1
fi
done
}
#$1: the files to be checked with IFS=' '
check_executable()
{
for file in $1; do
if [ ! -x "$file" ]; then
derror "Error: $file is not executable."
return 1
fi
done
}
backup_default_initrd()
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
{
ddebug "backup default initrd: $DEFAULT_INITRD"
if [ ! -f "$DEFAULT_INITRD" ]; then
return
fi
if [ ! -e $DEFAULT_INITRD_BAK ]; then
dinfo "Backing up $DEFAULT_INITRD before rebuild."
# save checksum to verify before restoring
sha1sum $DEFAULT_INITRD > $INITRD_CHECKSUM_LOCATION
cp $DEFAULT_INITRD $DEFAULT_INITRD_BAK
if [ $? -ne 0 ]; then
dwarn "WARNING: failed to backup $DEFAULT_INITRD."
rm -f $DEFAULT_INITRD_BAK
fi
fi
}
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
restore_default_initrd()
{
ddebug "restore default initrd: $DEFAULT_INITRD"
if [ ! -f "$DEFAULT_INITRD" ]; then
return
fi
# If a backup initrd exists, we must be switching back from
# fadump to kdump. Restore the original default initrd.
if [ -f $DEFAULT_INITRD_BAK ] && [ -f $INITRD_CHECKSUM_LOCATION ]; then
# verify checksum before restoring
backup_checksum=`sha1sum $DEFAULT_INITRD_BAK | awk '{ print $1 }'`
default_checksum=`cat $INITRD_CHECKSUM_LOCATION | awk '{ print $1 }'`
if [ "$default_checksum" != "$backup_checksum" ]; then
dwarn "WARNING: checksum mismatch! Can't restore original initrd.."
else
rm -f $INITRD_CHECKSUM_LOCATION
mv $DEFAULT_INITRD_BAK $DEFAULT_INITRD
if [[ $? -eq 0 ]]; then
derror "Restoring original initrd as fadump mode is disabled."
sync
fi
fi
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
fi
}
check_config()
{
local -A _opt_rec
while read -r config_opt config_val; do
case "$config_opt" in
dracut_args)
if [[ $config_val == *--mount* ]]; then
if [ $(echo $config_val | grep -o "\-\-mount" | wc -l) -ne 1 ]; then
derror "Multiple mount targets specified in one \"dracut_args\"."
return 1
fi
config_opt=_target
fi
;;
raw)
if [ -d "/proc/device-tree/ibm,opal/dump" ]; then
dwarn "WARNING: Won't capture opalcore when 'raw' dump target is used."
fi
config_opt=_target
;;
ext[234]|minix|btrfs|xfs|nfs|ssh)
config_opt=_target
;;
sshkey|path|core_collector|kdump_post|kdump_pre|extra_bins|extra_modules|failure_action|default|final_action|force_rebuild|force_no_rebuild|fence_kdump_args|fence_kdump_nodes)
;;
net|options|link_delay|disk_timeout|debug_mem_level|blacklist)
derror "Deprecated kdump config option: $config_opt. Refer to kdump.conf manpage for alternatives."
return 1
;;
'')
continue
;;
*)
derror "Invalid kdump config option $config_opt"
return 1
;;
esac
if [[ -z "$config_val" ]]; then
derror "Invalid kdump config value for option '$config_opt'"
return 1
fi
if [ -n "${_opt_rec[$config_opt]}" ]; then
if [ $config_opt == _target ]; then
derror "More than one dump targets specified"
else
derror "Duplicated kdump config value of option $config_opt"
fi
return 1
fi
_opt_rec[$config_opt]="$config_val"
done <<< "$(kdump_read_conf)"
check_failure_action_config || return 1
check_final_action_config || return 1
check_fence_kdump_config || return 1
return 0
}
# get_pcs_cluster_modified_files <image timestamp>
# return list of modified file for fence_kdump modified in Pacemaker cluster
get_pcs_cluster_modified_files()
{
local time_stamp
local modified_files
is_generic_fence_kdump && return 1
is_pcs_fence_kdump || return 1
time_stamp=`pcs cluster cib | xmllint --xpath 'string(/cib/@cib-last-written)' - | \
xargs -0 date +%s --date`
if [ -n $time_stamp -a $time_stamp -gt $image_time ]; then
modified_files="cluster-cib"
fi
if [ -f $FENCE_KDUMP_CONFIG_FILE ]; then
time_stamp=`stat -c "%Y" $FENCE_KDUMP_CONFIG_FILE`
if [ "$time_stamp" -gt "$image_time" ]; then
modified_files="$modified_files $FENCE_KDUMP_CONFIG_FILE"
fi
fi
echo $modified_files
}
setup_initrd()
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
{
prepare_kdump_bootinfo
if [ $? -ne 0 ]; then
derror "failed to prepare for kdump bootinfo."
return 1
fi
DEFAULT_INITRD_BAK="$KDUMP_BOOTDIR/.$(basename $DEFAULT_INITRD).default"
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
TARGET_INITRD="$DEFAULT_INITRD"
# backup initrd for reference before replacing it
# with fadump aware initrd
backup_default_initrd
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
else
TARGET_INITRD="$KDUMP_INITRD"
# check if a backup of default initrd exists. If yes,
# it signifies a switch from fadump mode. So, restore
# the backed up default initrd.
restore_default_initrd
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
fi
}
check_files_modified()
{
local modified_files=""
#also rebuild when Pacemaker cluster conf is changed and fence kdump is enabled.
modified_files=$(get_pcs_cluster_modified_files)
EXTRA_BINS=$(kdump_get_conf_val kdump_post)
CHECK_FILES=$(kdump_get_conf_val kdump_pre)
HOOKS="/etc/kdump/post.d/ /etc/kdump/pre.d/"
if [ -d /etc/kdump/post.d ]; then
for file in /etc/kdump/post.d/*; do
if [ -x "$file" ]; then
POST_FILES="$POST_FILES $file"
fi
done
fi
if [ -d /etc/kdump/pre.d ]; then
for file in /etc/kdump/pre.d/*; do
if [ -x "$file" ]; then
PRE_FILES="$PRE_FILES $file"
fi
done
fi
HOOKS="$HOOKS $POST_FILES $PRE_FILES"
CORE_COLLECTOR=$(kdump_get_conf_val core_collector | awk '{print $1}')
CORE_COLLECTOR=`type -P $CORE_COLLECTOR`
# POST_FILES and PRE_FILES are already checked against executable, need not to check again.
EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
CHECK_FILES=$(kdump_get_conf_val extra_bins)
EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
files="$KDUMP_CONFIG_FILE $KDUMP_KERNEL $EXTRA_BINS $CORE_COLLECTOR"
[[ -e /etc/fstab ]] && files="$files /etc/fstab"
# Check for any updated extra module
EXTRA_MODULES="$(kdump_get_conf_val extra_modules)"
if [ -n "$EXTRA_MODULES" ]; then
if [ -e /lib/modules/$KDUMP_KERNELVER/modules.dep ]; then
files="$files /lib/modules/$KDUMP_KERNELVER/modules.dep"
fi
for _module in $EXTRA_MODULES; do
_module_file="$(modinfo --set-version "$KDUMP_KERNELVER" --filename "$_module" 2>/dev/null)"
if [[ $? -eq 0 ]]; then
files="$files $_module_file"
for _dep_modules in $(modinfo -F depends $_module | tr ',' ' '); do
files="$files $(modinfo --set-version "$KDUMP_KERNELVER" --filename $_dep_modules 2>/dev/null)"
done
else
# If it's not a module nor builtin, give an error
if ! ( modprobe --set-version "$KDUMP_KERNELVER" --dry-run "$_module" &>/dev/null ); then
dwarn "Module $_module not found"
fi
fi
done
fi
# HOOKS is mandatory and need to check the modification time
files="$files $HOOKS"
check_exist "$files" && check_executable "$EXTRA_BINS"
[ $? -ne 0 ] && return 2
for file in $files; do
if [ -e "$file" ]; then
time_stamp=`stat -c "%Y" $file`
if [ "$time_stamp" -gt "$image_time" ]; then
modified_files="$modified_files $file"
fi
if [ -L "$file" ]; then
file=$(readlink -m $file)
time_stamp=`stat -c "%Y" $file`
if [ "$time_stamp" -gt "$image_time" ]; then
modified_files="$modified_files $file"
fi
fi
else
dwarn "$file doesn't exist"
fi
done
if [ -n "$modified_files" ]; then
dinfo "Detected change(s) in the following file(s): $modified_files"
return 1
fi
return 0
}
check_drivers_modified()
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
{
local _target _new_drivers _old_drivers _module_name _module_filename
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
# If it's dump target is on block device, detect the block driver
_target=$(get_block_dump_target)
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
if [[ -n "$_target" ]]; then
_record_block_drivers() {
local _drivers
_drivers=$(udevadm info -a "/dev/block/$1" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p')
for _driver in $_drivers; do
if ! [[ " $_new_drivers " == *" $_driver "* ]]; then
_new_drivers="$_new_drivers $_driver"
fi
done
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
ddebug "MAJ:MIN=$1 drivers='$_drivers'"
}
check_block_and_slaves_all _record_block_drivers "$(get_maj_min "$_target")"
fi
# Include watchdog drivers if watchdog module is not omitted
is_dracut_mod_omitted watchdog || _new_drivers+=" $(get_watchdog_drvs)"
[ -z "$_new_drivers" ] && return 0
if is_fadump_capable; then
_old_drivers="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/fadump-kernel-modules.txt | tr '\n' ' ')"
else
_old_drivers="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/hostonly-kernel-modules.txt | tr '\n' ' ')"
fi
ddebug "Modules required for kdump: '$_new_drivers'"
ddebug "Modules included in old initramfs: '$_old_drivers'"
for _driver in $_new_drivers; do
# Skip deprecated/invalid driver name or built-in module
_module_name=$(modinfo --set-version "$KDUMP_KERNELVER" -F name $_driver 2>/dev/null)
_module_filename=$(modinfo --set-version "$KDUMP_KERNELVER" -n $_driver 2>/dev/null)
if [ $? -ne 0 ] || [ -z "$_module_name" ] || [[ "$_module_filename" = *"(builtin)"* ]]; then
continue
fi
if ! [[ " $_old_drivers " == *" $_module_name "* ]]; then
dinfo "Detected change in block device driver, new loaded module: $_module_name"
return 1
fi
done
}
check_fs_modified()
{
local _old_dev _old_mntpoint _old_fstype
local _new_dev _new_mntpoint _new_fstype
local _target _dracut_args
# No need to check in case of mount target specified via "dracut_args".
if is_mount_in_dracut_args; then
return 0
fi
# No need to check in case of raw target.
# Currently we do not check also if ssh/nfs target is specified
if is_ssh_dump_target || is_nfs_dump_target || is_raw_dump_target; then
return 0
fi
_target=$(get_block_dump_target)
_new_fstype=$(get_fs_type_from_target $_target)
if [[ -z "$_target" ]] || [[ -z "$_new_fstype" ]];then
derror "Dump target is invalid"
return 2
fi
ddebug "_target=$_target _new_fstype=$_new_fstype"
_new_dev=$(kdump_get_persistent_dev $_target)
if [ -z "$_new_dev" ]; then
perror "Get persistent device name failed"
return 2
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
fi
_new_mntpoint="$(get_kdump_mntpoint_from_target $_target)"
_dracut_args=$(lsinitrd $TARGET_INITRD -f usr/lib/dracut/build-parameter.txt)
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
if [[ -z "$_dracut_args" ]];then
dwarn "Warning: No dracut arguments found in initrd"
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
return 0
fi
# if --mount argument present then match old and new target, mount
# point and file system. If any of them mismatches then rebuild
echo $_dracut_args | grep -q "\-\-mount"
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
if [[ $? -eq 0 ]];then
set -- $(echo $_dracut_args | awk -F "--mount '" '{print $2}' | cut -d' ' -f1,2,3)
_old_dev=$1
_old_mntpoint=$2
_old_fstype=$3
[[ $_new_dev = $_old_dev && $_new_mntpoint = $_old_mntpoint && $_new_fstype = $_old_fstype ]] && return 0
# otherwise rebuild if target device is not a root device
else
[[ "$_target" = "$(get_root_fs_device)" ]] && return 0
fi
dinfo "Detected change in File System"
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
return 1
}
# returns 0 if system is not modified
# returns 1 if system is modified
# returns 2 if system modification is invalid
check_system_modified()
{
local ret
[[ -f $TARGET_INITRD ]] || return 1
check_files_modified
ret=$?
if [ $ret -ne 0 ]; then
return $ret
fi
check_fs_modified
ret=$?
if [ $ret -ne 0 ]; then
return $ret
fi
check_drivers_modified
kdumpctl: force rebuild in case of file system is modified kdumpctl passes --device argument if dump target is a raw device. It passes --mount argument if dump target is either mounted as nfs or as a bulk device. When dump target device is a root device then it does not pass any of the above two arguments. After kdumpctl restart, if there is any change in file system which needs different dracut arguments, then initramfs must be rebuild. Modification in filesystem for a raw target does not affect dracut arguments. So, we do not consider to check any modification if raw target was specified in kdump.conf. We might need to change dracut arguments if there is some changes in nfs and ssh target related files. However, we do not consider them in this patch. We mainly consider changes in bulk target specified in kdump.conf. We also consider changes in bulk and nfs file system, if there was no dump target specified in kdump.conf but dump path is mounting such file systems. So the initramfs must be rebuild if, either dump target's persistent path or it's mount point or its file system type changes. If there is no dump target specified then, both dump path and root path must mount same device, otherwise rebuild should be triggered. Some of the examples when we can need a rebuild: -- "dump target" is specified as one of ext[234], xfs or btrfs. But after kdump initramfs building its UUID is changed by reformatting. -- "dump target" is specified as file system type fs1 (say ext3). But after kdump initramfs building, user change it to fs2 (say ext4), probably by a mkfs.ext4 executing on the target device. -- "dump target" is not specified, but "dump path" mounts a device which is different than device for root path and either UUID or file system type is modified after kdump initramfs build. -- "dump target" is not specified, but "dump path" mounts a nfs device and nfs host path changes after kdump initramfs build. Some testing: Initial conditions: -- No dump target specified -- dump path (/var/crash) and root(/) are on same device -- kdumpctl was already executed once after last modification in /etc/kdump.conf # kdumpctl restart No rebuild # mkfs.ext2 /dev/md0;mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/md0; # mount /dev/md0 /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.ext4 /dev/mapper/fedora-swap # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.btrfs /dev/mapper/fedora-swap -f # mount /dev/mapper/fedora-swap /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount /dev/mapper/fedora-swap /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash;mkfs.minix /dev/md0 # mount /dev/md0 /var/crash/; kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # mount 192.168.1.16:/nfsroot /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" # kdumpctl restart No rebuild # umount /var/crash;mount 192.168.1.12:/nfsroot /var/crash/ # kdumpctl restart Rebuilt because "Detected change in File System" # umount /var/crash/;kdumpctl restart Rebuilt because "Detected change in File System" Added "raw /dev/md0" in /etc/kdump.conf # kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # mkfs.ext4 /dev/md0 ;kdumpctl restart No rebuild Added "ext4 /dev/md0" in /etc/kdump.conf # mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" # umount /mnt;mkfs.ext4 /dev/md0;mount /dev/md0 /mnt # mkdir /mnt/var;mkdir /mnt/var/crash; kdumpctl restart Rebuilt because "Detected change in /etc/kdump.conf" Most of the credits for this patch goes to Xunlei Pang <xpang@redhat.com> for suggesting several improvements. Signed-off-by: Pratyush Anand <panand@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com> Acked-by: Baoquan He <xlpang@redhat.com> Acked-by: Dave Young <dyoung@redhat.com>
2016-05-09 08:17:55 +00:00
ret=$?
if [ $ret -ne 0 ]; then
return $ret
fi
return 0
}
check_rebuild()
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{
local capture_capable_initrd="1"
local force_rebuild force_no_rebuild
local ret system_modified="0"
setup_initrd
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
if [ $? -ne 0 ]; then
return 1
fi
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force_no_rebuild=$(kdump_get_conf_val force_no_rebuild)
force_no_rebuild=${force_no_rebuild:-0}
if [ "$force_no_rebuild" != "0" ] && [ "$force_no_rebuild" != "1" ];then
derror "Error: force_no_rebuild value is invalid"
return 1
fi
force_rebuild=$(kdump_get_conf_val force_rebuild)
force_rebuild=${force_rebuild:-0}
if [ "$force_rebuild" != "0" ] && [ "$force_rebuild" != "1" ];then
derror "Error: force_rebuild value is invalid"
return 1
fi
if [[ "$force_no_rebuild" == "1" && "$force_rebuild" == "1" ]]; then
derror "Error: force_rebuild and force_no_rebuild are enabled simultaneously in kdump.conf"
return 1
fi
# Will not rebuild kdump initrd
if [ "$force_no_rebuild" == "1" ]; then
return 0
fi
#check to see if dependent files has been modified
#since last build of the image file
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
if [ -f $TARGET_INITRD ]; then
image_time=`stat -c "%Y" $TARGET_INITRD 2>/dev/null`
#in case of fadump mode, check whether the default/target
#initrd is already built with dump capture capability
if [ "$DEFAULT_DUMP_MODE" == "fadump" ]; then
capture_capable_initrd=$(lsinitrd -f $DRACUT_MODULES_FILE "$TARGET_INITRD" | grep -c -e ^kdumpbase$ -e ^zz-fadumpinit$)
fi
2011-07-06 19:25:34 +00:00
fi
check_system_modified
ret=$?
if [ $ret -eq 2 ]; then
return 1
elif [ $ret -eq 1 ];then
system_modified="1"
fi
if [ $image_time -eq 0 ]; then
dinfo "No kdump initial ramdisk found."
elif [ "$capture_capable_initrd" == "0" ]; then
dinfo "Rebuild $TARGET_INITRD with dump capture support"
elif [ "$force_rebuild" != "0" ]; then
dinfo "Force rebuild $TARGET_INITRD"
elif [ "$system_modified" != "0" ]; then
:
else
return 0
2011-07-06 19:25:34 +00:00
fi
dinfo "Rebuilding $TARGET_INITRD"
rebuild_initrd
return $?
2011-07-06 19:25:34 +00:00
}
# On ppc64le LPARs, the keys trusted by firmware do not end up in
# .builtin_trusted_keys. So instead, add the key to the .ima keyring
function load_kdump_kernel_key()
{
# this is only called inside is_secure_boot_enforced,
# no need to retest
# this is only required if DT /ibm,secure-boot is a file.
# if it is a dir, we are on OpenPower and don't need this.
if ! [ -f /proc/device-tree/ibm,secure-boot ]; then
return
fi
KDUMP_KEY_ID=$(cat /usr/share/doc/kernel-keys/$KDUMP_KERNELVER/kernel-signing-ppc.cer |
keyctl padd asymmetric kernelkey-$RANDOM %:.ima)
}
# remove a previously loaded key. There's no real security implication
# to leaving it around, we choose to do this because it makes it easier
# to be idempotent and so as to reduce the potential for confusion.
function remove_kdump_kernel_key()
{
if [ -z "$KDUMP_KEY_ID" ]; then
return
fi
keyctl unlink $KDUMP_KEY_ID %:.ima
}
# Load the kdump kernel specified in /etc/sysconfig/kdump
2011-07-06 19:25:34 +00:00
# If none is specified, try to load a kdump kernel with the same version
# as the currently running kernel.
load_kdump()
2011-07-06 19:25:34 +00:00
{
local ret
KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")
KDUMP_COMMANDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
2011-07-06 19:25:34 +00:00
# For secureboot enabled machines, use new kexec file based syscall.
# Old syscall will always fail as it does not have capability to
# to kernel signature verification.
if is_secure_boot_enforced; then
dinfo "Secure Boot is enabled. Using kexec file based syscall."
KEXEC_ARGS="$KEXEC_ARGS -s"
load_kdump_kernel_key
fi
ddebug "$KEXEC $KEXEC_ARGS $standard_kexec_args --command-line=$KDUMP_COMMANDLINE --initrd=$TARGET_INITRD $KDUMP_KERNEL"
# The '12' represents an intermediate temporary file descriptor
# to store the standard error file descriptor '2', and later
# restore the error file descriptor with the file descriptor '12'
# and release it.
exec 12>&2
exec 2>> $KDUMP_LOG_PATH/kdump.log
PS4='+ $(date "+%Y-%m-%d %H:%M:%S") ${BASH_SOURCE}@${LINENO}: '
set -x
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$KEXEC $KEXEC_ARGS $standard_kexec_args \
--command-line="$KDUMP_COMMANDLINE" \
--initrd=$TARGET_INITRD $KDUMP_KERNEL
ret=$?
set +x
exec 2>&12 12>&-
remove_kdump_kernel_key
if [ $ret == 0 ]; then
dinfo "kexec: loaded kdump kernel"
2011-07-06 19:25:34 +00:00
return 0
else
derror "kexec: failed to load kdump kernel"
2011-07-06 19:25:34 +00:00
return 1
fi
}
check_ssh_config()
{
while read config_opt config_val; do
case "$config_opt" in
sshkey)
# remove inline comments after the end of a directive.
if [ -f "$config_val" ]; then
# canonicalize the path
SSH_KEY_LOCATION=$(/usr/bin/readlink -m $config_val)
else
dwarn "WARNING: '$config_val' doesn't exist, using default value '$SSH_KEY_LOCATION'"
fi
;;
path)
SAVE_PATH=$config_val
;;
ssh)
DUMP_TARGET=$config_val
;;
*)
;;
esac
done <<< "$(kdump_read_conf)"
#make sure they've configured kdump.conf for ssh dumps
local SSH_TARGET=`echo -n $DUMP_TARGET | sed -n '/.*@/p'`
if [ -z "$SSH_TARGET" ]; then
return 1
fi
return 0
}
# ipv6 host address may takes a long time to be ready.
# Instead of checking against ipv6 address, we just check the network reachable
# by the return val of 'ssh'
check_and_wait_network_ready()
{
local start_time=$(date +%s)
local warn_once=1
local cur
local diff
local retval
local errmsg
while true; do
errmsg=$(ssh -i $SSH_KEY_LOCATION -o BatchMode=yes $DUMP_TARGET mkdir -p $SAVE_PATH 2>&1)
retval=$?
# ssh exits with the exit status of the remote command or with 255 if an error occurred
if [ $retval -eq 0 ]; then
return 0
elif [ $retval -ne 255 ]; then
derror "Could not create $DUMP_TARGET:$SAVE_PATH, you should check the privilege on server side"
return 1
fi
# if server removes the authorized_keys or, no /root/.ssh/kdump_id_rsa
ddebug "$errmsg"
echo $errmsg | grep -q "Permission denied\|No such file or directory\|Host key verification failed"
if [ $? -eq 0 ]; then
derror "Could not create $DUMP_TARGET:$SAVE_PATH, you probably need to run \"kdumpctl propagate\""
return 1
fi
if [ $warn_once -eq 1 ]; then
dwarn "Network dump target is not usable, waiting for it to be ready..."
warn_once=0
fi
cur=$(date +%s)
let "diff = $cur - $start_time"
# 60s time out
if [ $diff -gt 180 ]; then
break;
fi
sleep 1
done
dinfo "Could not create $DUMP_TARGET:$SAVE_PATH, ipaddr is not ready yet. You should check network connection"
return 1
}
check_ssh_target()
{
check_and_wait_network_ready
if [ $? -ne 0 ]; then
return 1
fi
return 0
}
propagate_ssh_key()
2011-07-06 19:25:34 +00:00
{
check_ssh_config
if [ $? -ne 0 ]; then
derror "No ssh config specified in $KDUMP_CONFIG_FILE. Can't propagate"
exit 1
fi
local KEYFILE=$SSH_KEY_LOCATION
2011-07-06 19:25:34 +00:00
local errmsg="Failed to propagate ssh key"
#Check to see if we already created key, if not, create it.
if [ -f $KEYFILE ]; then
dinfo "Using existing keys..."
2011-07-06 19:25:34 +00:00
else
dinfo "Generating new ssh keys... "
/usr/bin/ssh-keygen -t rsa -f $KEYFILE -N "" 2>&1 > /dev/null
dinfo "done."
2011-07-06 19:25:34 +00:00
fi
#now find the target ssh user and server to contact.
SSH_USER=`echo $DUMP_TARGET | cut -d\ -f2 | cut -d@ -f1`
SSH_SERVER=`echo $DUMP_TARGET | sed -e's/\(.*@\)\(.*$\)/\2/'`
2011-07-06 19:25:34 +00:00
#now send the found key to the found server
ssh-copy-id -i $KEYFILE $SSH_USER@$SSH_SERVER
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RET=$?
if [ $RET == 0 ]; then
dinfo "$KEYFILE has been added to ~$SSH_USER/.ssh/authorized_keys on $SSH_SERVER"
2011-07-06 19:25:34 +00:00
return 0
else
derror "$errmsg, $KEYFILE failed in transfer to $SSH_SERVER"
2011-07-06 19:25:34 +00:00
exit 1
fi
}
show_reserved_mem()
{
local mem=$(cat /sys/kernel/kexec_crash_size)
local mem_mb=$(expr $mem / 1024 / 1024)
dinfo "Reserved "$mem_mb"MB memory for crash kernel"
}
check_current_fadump_status()
{
# Check if firmware-assisted dump has been registered.
rc=`cat $FADUMP_REGISTER_SYS_NODE`
[ $rc -eq 1 ] && return 0
return 1
}
check_current_status()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
check_current_fadump_status
else
check_current_kdump_status
fi
return $?
}
save_raw()
{
local kdump_dir
local raw_target
raw_target=$(kdump_get_conf_val raw)
[ -z "$raw_target" ] && return 0
[ -b "$raw_target" ] || {
derror "raw partition $raw_target not found"
return 1
}
check_fs=$(lsblk --nodeps -npo FSTYPE $raw_target)
if [[ $(echo $check_fs | wc -w) -ne 0 ]]; then
dwarn "Warning: Detected '$check_fs' signature on $raw_target, data loss is expected."
return 0
fi
kdump_dir=$(kdump_get_conf_val path)
if [ -z "${kdump_dir}" ]; then
coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"
else
coredir="${kdump_dir}/`date +"%Y-%m-%d-%H:%M"`"
fi
mkdir -p "$coredir"
[ -d "$coredir" ] || {
derror "failed to create $coredir"
return 1
}
if makedumpfile -R $coredir/vmcore <$raw_target >/dev/null 2>&1; then
# dump found
dinfo "Dump saved to $coredir/vmcore"
# wipe makedumpfile header
dd if=/dev/zero of=$raw_target bs=1b count=1 2>/dev/null
else
rm -rf "$coredir"
fi
return 0
}
local_fs_dump_target()
{
local _target
_target=$(grep -E "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf)
if [ $? -eq 0 ]; then
echo $_target|awk '{print $2}'
fi
}
path_to_be_relabeled()
{
local _path _target _mnt="/" _rmnt
if is_user_configured_dump_target; then
if is_mount_in_dracut_args; then
return;
fi
_target=$(local_fs_dump_target)
if [[ -n "$_target" ]]; then
_mnt=$(get_mntpoint_from_target $_target)
if ! is_mounted "$_mnt"; then
return
fi
else
return
fi
fi
_path=$(get_save_path)
# if $_path is masked by other mount, we will not relabel it.
_rmnt=$(df $_mnt/$_path 2>/dev/null | tail -1 | awk '{ print $NF }')
if [ "$_rmnt" == "$_mnt" ]; then
echo $_mnt/$_path
fi
}
selinux_relabel()
{
local _path _i _attr
_path=$(path_to_be_relabeled)
if [ -z "$_path" ] || ! [ -d "$_path" ] ; then
return
fi
while IFS= read -r -d '' _i; do
_attr=$(getfattr -m "security.selinux" "$_i" 2>/dev/null)
if [ -z "$_attr" ]; then
restorecon "$_i";
fi
done < <(find "$_path" -print0)
}
check_fence_kdump_config()
{
local hostname=`hostname`
local ipaddrs=`hostname -I`
kdump-lib.sh: add a config value retrive helper Add a helper kdump_get_conf_val to replace get_option_value. It can help cover more corner cases in the code, like when there are multiple spaces in config file, config value separated by a tab, heading spaces, or trailing comments. And this uses "sed group command" and "sed hold buffer", make it much faster than previous `grep <config> | tail -1`. This helper is supposed to provide a universal way for kexec-tools scripts to read in config value. Currently, different scripts are reading the config in many different fragile ways. For example, following codes are found in kexec-tools script code base: 1. grep ^force_rebuild $KDUMP_CONFIG_FILE echo $_force_rebuild | cut -d' ' -f2 2. grep ^kdump_post $KDUMP_CONFIG_FILE | cut -d\ -f2 3. awk '/^sshkey/ {print $2}' $conf_file 4. grep ^path $KDUMP_CONFIG_FILE | cut -d' ' -f2- 1, 2, and 4 will fail if the space is replaced by, e.g. a tab 1 and 2 might fail if there are multiple spaces between config name and config value: "kdump_post /var/crash/scripts/kdump-post.sh" A space will be read instead of config value. 1, 2, 3 will fail if there are space in file path, like: "kdump_post /var/crash/scripts dir/kdump-post.sh" 4 will fail if there are trailing comments: "path /var/crash # some comment here" And all will fail if there are heading space, " path /var/crash" And all will most likely cause problems if the config file contains the same option more than once. And all of them are slower than the new sed call. Old get_option_value is also very slow and doesn't handle heading space. Although we never claim to support heading space or tailing comments before, it's harmless to be more robust on config reading, and many conf files in /etc support heading spaces. And have a faster and safer config reading helper makes it easier to clean up the code. Signed-off-by: Kairui Song <kasong@redhat.com> Acked-by: Philipp Rudo <prudo@redhat.com>
2021-08-16 15:25:14 +00:00
local nodes=$(kdump_get_conf_val "fence_kdump_nodes")
for node in $nodes; do
if [ "$node" = "$hostname" ]; then
derror "Option fence_kdump_nodes cannot contain $hostname"
return 1
fi
# node can be ipaddr
echo "$ipaddrs " | grep -q "$node "
if [ $? -eq 0 ]; then
derror "Option fence_kdump_nodes cannot contain $node"
return 1
fi
done
return 0
}
check_dump_feasibility()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
return 0
fi
check_kdump_feasibility
return $?
}
start_fadump()
{
echo 1 > $FADUMP_REGISTER_SYS_NODE
if ! check_current_fadump_status; then
derror "fadump: failed to register"
return 1
fi
dinfo "fadump: registered successfully"
return 0
}
start_dump()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
start_fadump
else
load_kdump
fi
return $?
}
check_failure_action_config()
{
local default_option
local failure_action
local option="failure_action"
default_option=$(kdump_get_conf_val default)
failure_action=$(kdump_get_conf_val failure_action)
if [ -z "$failure_action" -a -z "$default_option" ]; then
return 0
elif [ -n "$failure_action" -a -n "$default_option" ]; then
derror "Cannot specify 'failure_action' and 'default' option together"
return 1
fi
if [ -n "$default_option" ]; then
option="default"
failure_action="$default_option"
fi
case "$failure_action" in
reboot|halt|poweroff|shell|dump_to_rootfs)
return 0
;;
*)
dinfo $"Usage kdump.conf: $option {reboot|halt|poweroff|shell|dump_to_rootfs}"
return 1
esac
}
check_final_action_config()
{
local final_action
final_action=$(kdump_get_conf_val final_action)
if [ -z "$final_action" ]; then
return 0
else
case "$final_action" in
reboot|halt|poweroff)
return 0
;;
*)
dinfo $"Usage kdump.conf: final_action {reboot|halt|poweroff}"
return 1
esac
fi
}
start()
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{
check_dump_feasibility
if [ $? -ne 0 ]; then
derror "Starting kdump: [FAILED]"
return 1
fi
check_config
if [ $? -ne 0 ]; then
derror "Starting kdump: [FAILED]"
return 1
fi
if sestatus 2>/dev/null | grep -q "SELinux status.*enabled"; then
selinux_relabel
fi
save_raw
if [ $? -ne 0 ]; then
derror "Starting kdump: [FAILED]"
return 1
fi
check_current_status
if [ $? == 0 ]; then
dwarn "Kdump already running: [WARNING]"
return 0
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fi
if check_ssh_config; then
if ! check_ssh_target; then
derror "Starting kdump: [FAILED]"
return 1
fi
fi
check_rebuild
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if [ $? != 0 ]; then
derror "Starting kdump: [FAILED]"
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return 1
fi
start_dump
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if [ $? != 0 ]; then
derror "Starting kdump: [FAILED]"
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return 1
fi
dinfo "Starting kdump: [OK]"
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}
reload()
{
check_current_status
if [ $? -ne 0 ]; then
dwarn "Kdump was not running: [WARNING]"
fi
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
reload_fadump
return $?
else
stop_kdump
fi
if [ $? -ne 0 ]; then
derror "Stopping kdump: [FAILED]"
return 1
fi
dinfo "Stopping kdump: [OK]"
setup_initrd
if [ $? -ne 0 ]; then
derror "Starting kdump: [FAILED]"
return 1
fi
start_dump
if [ $? -ne 0 ]; then
derror "Starting kdump: [FAILED]"
return 1
fi
dinfo "Starting kdump: [OK]"
}
stop_fadump()
{
echo 0 > $FADUMP_REGISTER_SYS_NODE
if check_current_fadump_status; then
derror "fadump: failed to unregister"
return 1
fi
dinfo "fadump: unregistered successfully"
return 0
}
stop_kdump()
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{
if is_secure_boot_enforced; then
$KEXEC -s -p -u
else
$KEXEC -p -u
fi
if [ $? != 0 ]; then
derror "kexec: failed to unload kdump kernel"
return 1
fi
dinfo "kexec: unloaded kdump kernel"
return 0
}
reload_fadump()
{
echo 1 > $FADUMP_REGISTER_SYS_NODE
if [ $? == 0 ]; then
dinfo "fadump: re-registered successfully"
return 0
else
# FADump could fail on older kernel where re-register
# support is not enabled. Try stop/start from userspace
# to handle such scenario.
stop_fadump
if [ $? == 0 ]; then
start_fadump
return $?
fi
fi
return 1
}
stop()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
stop_fadump
else
stop_kdump
fi
if [ $? != 0 ]; then
derror "Stopping kdump: [FAILED]"
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return 1
fi
dinfo "Stopping kdump: [OK]"
return 0
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}
rebuild() {
check_config
if [ $? -ne 0 ]; then
return 1
fi
if check_ssh_config; then
if ! check_ssh_target; then
return 1
fi
fi
setup_initrd
if [ $? -ne 0 ]; then
return 1
fi
dinfo "Rebuilding $TARGET_INITRD"
rebuild_initrd
return $?
}
do_estimate() {
local kdump_mods
local -A large_mods
local baseline
local kernel_size mod_size initrd_size baseline_size runtime_size reserved_size estimated_size recommended_size
local size_mb=$(( 1024 * 1024 ))
setup_initrd
if [ ! -f "$TARGET_INITRD" ]; then
derror "kdumpctl estimate: kdump initramfs is not built yet."
exit 1
fi
kdump_mods="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/hostonly-kernel-modules.txt | tr '\n' ' ')"
baseline=$(kdump_get_arch_recommend_size)
if [[ "${baseline: -1}" == "M" ]]; then
baseline=${baseline%M}
elif [[ "${baseline: -1}" == "G" ]]; then
baseline=$(( ${baseline%G} * 1024 ))
elif [[ "${baseline: -1}" == "T" ]]; then
baseline=$(( ${baseline%Y} * 1048576 ))
fi
# The default pre-reserved crashkernel value
baseline_size=$((baseline * size_mb))
# Current reserved crashkernel size
reserved_size=$(cat /sys/kernel/kexec_crash_size)
# A pre-estimated value for userspace usage and kernel
# runtime allocation, 64M should good for most cases
runtime_size=$((64 * size_mb))
# Kernel image size
kernel_size=$(get_kernel_size "$KDUMP_KERNEL")
# Kdump initramfs size
initrd_size=$(du -b "$TARGET_INITRD" | awk '{print $1}')
# Kernel modules static size after loaded
mod_size=0
while read -r _name _size _; do
if [[ ! " $kdump_mods " == *" $_name "* ]]; then
continue
fi
mod_size=$((mod_size + _size))
# Mark module with static size larger than 2M as large module
if [[ $((_size / size_mb)) -ge 1 ]]; then
large_mods[$_name]=$_size
fi
done <<< "$(< /proc/modules)"
# Extra memory usage required for LUKS2 decryption
crypt_size=0
for _dev in $(get_all_kdump_crypt_dev); do
_crypt_info=$(cryptsetup luksDump "/dev/block/$_dev")
[[ $(echo "$_crypt_info" | sed -n "s/^Version:\s*\(.*\)/\1/p" ) == "2" ]] || continue
for _mem in $(echo "$_crypt_info" | sed -n "s/\sMemory:\s*\(.*\)/\1/p" | sort -n ); do
crypt_size=$((crypt_size + _mem * 1024))
break
done
done
[[ $crypt_size -ne 0 ]] && echo -e "Encrypted kdump target requires extra memory, assuming using the keyslot with minimun memory requirement\n"
estimated_size=$((kernel_size + mod_size + initrd_size + runtime_size + crypt_size))
if [[ $baseline_size -gt $estimated_size ]]; then
recommended_size=$baseline_size
else
recommended_size=$estimated_size
fi
echo "Reserved crashkernel: $((reserved_size / size_mb))M"
echo "Recommended crashkernel: $((recommended_size / size_mb))M"
echo
echo "Kernel image size: $((kernel_size / size_mb))M"
echo "Kernel modules size: $((mod_size / size_mb))M"
echo "Initramfs size: $((initrd_size / size_mb))M"
echo "Runtime reservation: $((runtime_size / size_mb))M"
[[ $crypt_size -ne 0 ]] && \
echo "LUKS required size: $((crypt_size / size_mb))M"
echo -n "Large modules:"
if [[ "${#large_mods[@]}" -eq 0 ]]; then
echo " <none>"
else
echo ""
for _mod in "${!large_mods[@]}"; do
echo " $_mod: ${large_mods[$_mod]}"
done
fi
if [[ $reserved_size -le $recommended_size ]]; then
echo "WARNING: Current crashkernel size is lower than recommended size $((recommended_size / size_mb))M."
fi
}
reset_crashkernel() {
local kernel=$1 entry crashkernel_default
local grub_etc_default="/etc/default/grub"
[[ -z "$kernel" ]] && kernel=$(uname -r)
crashkernel_default=$(cat "/usr/lib/modules/$kernel/crashkernel.default" 2>/dev/null)
if [[ -z "$crashkernel_default" ]]; then
derror "$kernel doesn't have a crashkernel.default"
exit 1
fi
if is_atomic; then
if rpm-ostree kargs | grep -q "crashkernel="; then
rpm-ostree --replace="crashkernel=$crashkernel_default"
else
rpm-ostree --append="crashkernel=$crashkernel_default"
fi
else
entry=$(grubby --info ALL | grep "^kernel=.*$kernel")
entry=${entry#kernel=}
entry=${entry#\"}
entry=${entry%\"}
if [[ -f "$grub_etc_default" ]]; then
sed -i -e "s/^\(GRUB_CMDLINE_LINUX=.*\)crashkernel=[^\ \"]*\([\ \"].*\)$/\1$crashkernel_default\2/" "$grub_etc_default"
fi
[[ -f /etc/zipl.conf ]] && zipl_arg="--zipl"
grubby --args "$crashkernel_default" --update-kernel "$entry" $zipl_arg
[[ $zipl_arg ]] && zipl > /dev/null
fi
}
if [ ! -f "$KDUMP_CONFIG_FILE" ]; then
derror "Error: No kdump config file found!"
exit 1
fi
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main ()
{
# Determine if the dump mode is kdump or fadump
determine_dump_mode
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case "$1" in
start)
if [ -s /proc/vmcore ]; then
save_core
reboot
else
start
fi
;;
stop)
stop
;;
status)
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EXIT_CODE=0
check_current_status
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case "$?" in
0)
dinfo "Kdump is operational"
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EXIT_CODE=0
;;
1)
dinfo "Kdump is not operational"
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EXIT_CODE=3
;;
esac
exit $EXIT_CODE
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;;
reload)
reload
;;
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restart)
stop
start
;;
rebuild)
rebuild
;;
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condrestart)
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;;
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propagate)
propagate_ssh_key
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;;
showmem)
show_reserved_mem
;;
estimate)
do_estimate
;;
reset-crashkernel)
reset_crashkernel "$2"
;;
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*)
dinfo $"Usage: $0 {estimate|start|stop|status|restart|reload|rebuild|reset-crashkernel|propagate|showmem}"
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exit 1
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esac
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}
# Other kdumpctl instances will block in queue, until this one exits
single_instance_lock
# To avoid fd 9 leaking, we invoke a subshell, close fd 9 and call main.
# So that fd isn't leaking when main is invoking a subshell.
(exec 9<&-; main "$@")
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exit $?