kexec-tools/kdumpctl

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#!/bin/bash
2011-07-06 19:25:34 +00:00
KEXEC=/sbin/kexec
KDUMP_KERNELVER=""
KDUMP_COMMANDLINE=""
KEXEC_ARGS=""
KDUMP_CONFIG_FILE="/etc/kdump.conf"
MKDUMPRD="/sbin/mkdumprd -f"
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: 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
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
. $dracutbasedir/dracut-functions.sh
. /lib/kdump/kdump-lib.sh
2011-07-06 19:25:34 +00:00
standard_kexec_args="-p"
# 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
single_instance_lock()
{
local rc timeout=5
exec 9>/var/lock/kdump
if [ $? -ne 0 ]; then
echo "Create file lock failed"
exit 1
fi
flock -n 9
rc=$?
while [ $rc -ne 0 ]; do
echo "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
echo "Dump mode is fadump"
DEFAULT_DUMP_MODE="fadump"
fi
}
save_core()
2011-07-06 19:25:34 +00:00
{
coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"
mkdir -p $coredir
cp --sparse=always /proc/vmcore $coredir/vmcore-incomplete
if [ $? == 0 ]; then
mv $coredir/vmcore-incomplete $coredir/vmcore
echo "saved a vmcore to $coredir"
2011-07-06 19:25:34 +00:00
else
echo "failed to save a vmcore to $coredir" >&2
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
makedumpfile --dump-dmesg $coredir/vmcore $coredir/dmesg >/dev/null 2>&1
dumpoops -d $coredir/dmesg >/dev/null 2>&1
if [ $? == 0 ]; then
echo "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()
{
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
local target_initrd_tmp
# this file tells the initrd is fadump enabled
touch /tmp/fadump.initramfs
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_tmp="$TARGET_INITRD.tmp"
fadump: use the original initrd to rebuild fadump initrdfrom The idea behind adding support for dracut '--rebuild' option was to ensure the initrd built for fadump takes into consideration all the build parameters passed to original initrd. Pass original initrd instead of current default initrd for rebuild as current initrd might already have build parameters from original initrd along with parameters from previous fadump intird build making the build parameters look like this after a few iterations: -H --persistent-policy 'by-uuid' -f --quiet --hostonly --hostonly- cmdline --hostonly-i18n --hostonly-mode 'strict' -o 'plymouth dash resume ifcfg' --mount '/dev/mapper/rhel_zzfp219--lp3-home /kdumproot //home xfs defaults' -f --kver '4.18.0-60.el8.ppc64le' --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode 'strict' -o 'plymouth dash resume ifcfg' --mount '/dev/mapper/rhel_zzfp219--lp3-home /kdumproot//home xfs defaults' -f --kver '4.18.0-60.el8.ppc64le' --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode 'strict' -o 'plymouth dash resume ifcfg' --mount '/dev/mapper/rhel_zzfp219--lp3-home /kdumproot//home xfs defaults' -f --kver '4.18.0-60.el8.ppc64le' --include '/tmp/fadump.initramfs' '/etc/fadump.initramfs' --include '/tmp/fadump.initramfs' '/etc/fadump.initramfs' --include '/tmp/fadump.initramfs' '/etc/fadump.initramfs' -- Since it is not desirable to build initrd with stale and/or duplicate build parameters, use original initrd (backed up) to rebuild fadump initrd, instead of current default initrd. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Acked-by: Dave Young <dyoung@redhat.com>
2019-02-05 20:17:38 +00:00
$MKDUMPRD $target_initrd_tmp --rebuild $DEFAULT_INITRD_BAK --kver $kdump_kver \
-i /tmp/fadump.initramfs /etc/fadump.initramfs
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 [ $? != 0 ]; then
echo "mkdumprd: failed to rebuild initrd with fadump support" >&2
rm -f /tmp/fadump.initramfs
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
rm -f /tmp/fadump.initramfs
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
# updating fadump initrd
mv $target_initrd_tmp $TARGET_INITRD
sync
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()
{
$MKDUMPRD $TARGET_INITRD $kdump_kver
if [ $? != 0 ]; then
echo "mkdumprd: failed to make kdump initrd" >&2
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
echo "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 "$KDUMP_BOOTDIR" ]];then
echo "$KDUMP_BOOTDIR does not have write permission. Can not 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 $1; do
if [ ! -f "$file" ]; then
echo -n "Error: $file not found."; echo
return 1
fi
done
}
#$1: the files to be checked with IFS=' '
check_executable()
{
for file in $1; do
if [ ! -x "$file" ]; then
echo -n "Error: $file is not executable."; echo
return 1
fi
done
}
backup_default_initrd()
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
{
if [ ! -f "$DEFAULT_INITRD" ]; then
return
fi
if [ ! -e $DEFAULT_INITRD_BAK ]; then
echo "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
echo "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()
{
# 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
echo "WARNING: checksum mismatch! Can't restore original initrd.."
else
rm -f $INITRD_CHECKSUM_LOCATION
mv $DEFAULT_INITRD_BAK $DEFAULT_INITRD
if [[ $? -eq 0 ]]; then
echo -n "Restoring original initrd as fadump mode "
echo "is disabled."
sync
fi
fi
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
fi
}
check_config()
{
local nr
2016-08-26 03:23:35 +00:00
nr=$(awk 'BEGIN{cnt=0} /^raw|^ssh[[:blank:]]|^nfs|^ext[234]|^xfs|^btrfs|^minix|^dracut_args .*\-\-mount/{cnt++} END{print cnt}' $KDUMP_CONFIG_FILE)
[ $nr -gt 1 ] && {
echo "More than one dump targets specified."
return 1
}
# Check if path option is set more than once.
nr=$(awk 'BEGIN{cnt=0} /^path /{cnt++} END{print cnt}' $KDUMP_CONFIG_FILE)
[ $nr -gt 1 ] && {
echo "Mutiple paths specifed in $KDUMP_CONFIG_FILE"
return 1
}
2016-08-26 03:23:35 +00:00
nr=$(grep "^dracut_args .*\-\-mount" $KDUMP_CONFIG_FILE | grep -o "\-\-mount" | wc -l)
[ $nr -gt 1 ] && {
echo "Multiple mount targets specified in one \"dracut_args\"."
return 1
}
# Check if we have any leading spaces (or tabs) before the
# variable name in the kdump conf file
if grep -E -q '^[[:blank:]]+[a-z]' $KDUMP_CONFIG_FILE; then
echo "No whitespaces are allowed before a kdump option name in $KDUMP_CONFIG_FILE"
return 1
fi
while read config_opt config_val; do
case "$config_opt" in
\#* | "")
;;
raw|ext2|ext3|ext4|minix|btrfs|xfs|nfs|ssh|sshkey|path|core_collector|kdump_post|kdump_pre|extra_bins|extra_modules|failure_action|default|final_action|force_rebuild|force_no_rebuild|dracut_args|fence_kdump_args|fence_kdump_nodes)
# remove inline comments after the end of a directive.
[ -z "$config_val" ] && {
echo "Invalid kdump config value for option $config_opt."
return 1;
}
;;
net|options|link_delay|disk_timeout|debug_mem_level|blacklist)
echo "Deprecated kdump config option: $config_opt. Refer to kdump.conf manpage for alternatives."
return 1
;;
*)
echo "Invalid kdump config option $config_opt"
return 1;
;;
esac
done <<< "$(read_strip_comments $KDUMP_CONFIG_FILE)"
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 $modified_files
}
setup_initrd()
kdump: Rebuild default initrd for firmware assisted dump The current kdump infrastructure builds a separate initrd which then gets loaded into memory by kexec-tools for use by kdump kernel. But firmware assisted dump (FADUMP) does not use kexec-based approach. After crash, firmware reboots the partition and loads grub loader like the normal booting process does. Hence in the FADUMP approach, the second kernel (after crash) will always use the default initrd (OS built). So, to support FADUMP, change is required, as in to add dump capturing steps, in this initrd. The current kdumpctl script implementation already has the code to build initrd using mkdumprd. This patch uses the new '--rebuild' option introduced, in dracut, to incrementally build the initramfs image. Before rebuilding, we may need to probe the initrd image for fadump support, to avoid rebuilding the initrd image multiple times unnecessarily. This can be done using "lsinitrd" tool with the newly proposed '--mod' option & inspecting the presence of "kdumpbase" in the list of modules of default initrd image. We rebuild the image if only "kdumpbase" module is missing in the initrd image. Also, before rebuilding, a backup of default initrd image is taken. Kexec-tools package in rhel7 is now enhanced to insert a out-of-tree kdump module for dracut, which is responsible for adding vmcore capture steps into initrd, if dracut is invoked with "IN_KDUMP" environment variable set to 1. mkdumprd script exports "IN_KDUMP=1" environment variable before invoking dracut to build kdump initrd. This patch relies on this current mechanism of kdump init script. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Acked-by: Vivek Goyal <vgoyal@redhat.com>
2014-07-24 18:39:07 +00:00
{
KDUMP_BOOTDIR=$(check_boot_dir "${KDUMP_BOOTDIR}")
if [ -z "$KDUMP_KERNELVER" ]; then
kdump_kver=`uname -r`
else
kdump_kver=$KDUMP_KERNELVER
fi
kdump_kernel="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
DEFAULT_INITRD="${KDUMP_BOOTDIR}/initramfs-`uname -r`.img"
DEFAULT_INITRD_BAK="${KDUMP_BOOTDIR}/.initramfs-`uname -r`.img.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="${KDUMP_BOOTDIR}/initramfs-${kdump_kver}kdump.img"
# 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=`grep ^kdump_post $KDUMP_CONFIG_FILE | cut -d\ -f2`
CHECK_FILES=`grep ^kdump_pre $KDUMP_CONFIG_FILE | cut -d\ -f2`
CORE_COLLECTOR=`grep ^core_collector $KDUMP_CONFIG_FILE | cut -d\ -f2`
CORE_COLLECTOR=`type -P $CORE_COLLECTOR`
EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
CHECK_FILES=`grep ^extra_bins $KDUMP_CONFIG_FILE | cut -d\ -f2-`
EXTRA_BINS="$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="$(grep ^extra_modules $KDUMP_CONFIG_FILE | sed 's/^extra_modules\s*//')"
if [ -n "$EXTRA_MODULES" ]; then
if [ -e /lib/modules/$kdump_kver/modules.dep ]; then
files="$files /lib/modules/$kdump_kver/modules.dep"
fi
for _module in $EXTRA_MODULES; do
_module_file="$(modinfo --set-version "$kdump_kver" --filename "$_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_kver" --filename $_dep_modules 2>/dev/null)"
done
else
# If it's not a module nor builtin, give an error
if ! ( modprobe --set-version "$kdump_kver" --dry-run "$_module" &>/dev/null ); then
echo "Module $_module not found"
fi
fi
done
fi
check_exist "$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 $file"
fi
fi
else
echo "$file doesn't exist"
fi
done
if [ -n "$modified_files" ]; then
echo "Detected change(s) in the following file(s):"
echo -n " "; echo "$modified_files" | sed 's/\s/\n /g'
return 1
fi
return 0
}
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
check_dump_fs_modified()
{
local _old_dev _old_mntpoint _old_fstype
local _new_dev _new_mntpoint _new_fstype
local _target _path _dracut_args
local _target_drivers _module_name
local _old_drivers="$(lsinitrd $TARGET_INITRD -f /usr/lib/dracut/loaded-kernel-modules.txt | tr '\n' ' ')"
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
2016-08-26 03:23:35 +00:00
# No need to check in case of mount target specified via "dracut_args".
if is_mount_in_dracut_args; then
return 0
fi
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
# 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_user_configured_dump_disk)
if [[ -n "$_target" ]]; then
_target=$(to_dev_name $_target)
_new_fstype=$(blkid $_target | awk -F"TYPE=" '{print $2}' | cut -d '"' -f 2)
else
_path=$(get_save_path)
_target=$(get_target_from_path $_path)
_target=$(to_dev_name $_target)
_new_fstype=$(get_fs_type_from_target $_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 [[ -z "$_target" || -z "$_new_fstype" ]];then
echo "Dump path $_path does not exist"
return 2
fi
fi
_record_block_drivers() {
local _drivers
if [[ -b /dev/block/$1 ]]; then
_drivers=$(udevadm info -a "/dev/block/$1" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p')
fi
if [[ -b $1 ]]; then
_drivers=$(udevadm info -a "$1" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p')
fi
for _driver in $_drivers; do
if ! [[ " $_target_drivers " == *" $_driver "* ]]; then
_target_drivers="$_target_drivers $_driver"
fi
done
return 1
}
check_block_and_slaves_all _record_block_drivers "$(get_maj_min "$_target")"
for _driver in $_target_drivers; do
# Target is mounted already, if module is not included by current kernel,
# could be a deprecated/invalid driver name or a built-in module
_module_name=$(modinfo --set-version "$kdump_kver" -F name $_driver 2>/dev/null)
if [ $? -ne 0 ] || [ -z "$_module_name" ]; then
continue
fi
if ! [[ " $_old_drivers " == *" $_module_name "* ]]; then
echo "Detected change in block device driver, new loaded module: $_module_name"
return 1
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
if [[ $(expr substr $_new_fstype 1 3) = "nfs" ]];then
_new_dev=$_target
else
_new_dev=$(get_persistent_dev $_target)
if [ -z "$_new_dev" ]; then
echo "Get persistent device name failed"
return 2
fi
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
if ! findmnt $_target >/dev/null; then
echo "Dump target $_target is probably not mounted."
return 2
fi
if [[ "$_target" = "$(get_root_fs_device)" ]]; then
_new_mntpoint="/sysroot"
else
_new_mntpoint="/kdumproot/$(get_mntpoint_from_target $_target)"
fi
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
_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
echo "Warning: No dracut arguments found in initrd"
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 "\-\-mount" &> /dev/null
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
echo "Detected change in File System"
return 1
}
check_wdt_modified()
{
local -A _drivers
local _alldrivers _active _wdtdrv _wdtppath _dir
local wd_old wd_new
is_wdt_mod_omitted
[[ $? -eq 0 ]] && return 0
[[ -d /sys/class/watchdog/ ]] || return 0
# Copied logic from dracut 04watchdog/module-setup.sh::installkernel()
for _dir in /sys/class/watchdog/*; do
[[ -d "$_dir" ]] || continue
[[ -f "$_dir/state" ]] || continue
_active=$(< "$_dir/state")
[[ "$_active" = "active" ]] || continue
# device/modalias will return driver of this device
_wdtdrv=$(< "$_dir/device/modalias")
# There can be more than one module represented by same
# modalias. Currently load all of them.
# TODO: Need to find a way to avoid any unwanted module
# represented by modalias
_wdtdrv=$(modprobe --set-version "$kdump_kver" -R $_wdtdrv 2>/dev/null)
if [[ $_wdtdrv ]]; then
for i in $_wdtdrv; do
_drivers[$i]=1
done
fi
# however in some cases, we also need to check that if there is
# a specific driver for the parent bus/device. In such cases
# we also need to enable driver for parent bus/device.
_wdtppath=$(readlink -f "$_dir/device")
while [[ -d "$_wdtppath" ]] && [[ "$_wdtppath" != "/sys" ]]; do
_wdtppath=$(readlink -f "$_wdtppath/..")
[[ -f "$_wdtppath/modalias" ]] || continue
_wdtdrv=$(< "$_wdtppath/modalias")
_wdtdrv=$(modprobe --set-version "$kdump_kver" -R $_wdtdrv 2>/dev/null)
if [[ $_wdtdrv ]]; then
for i in $_wdtdrv; do
_drivers[$i]=1
done
fi
done
done
# ensure that watchdog module is loaded as early as possible
_alldrivers="${!_drivers[*]}"
[[ $_alldrivers ]] && wd_new="rd.driver.pre=${_alldrivers// /,}"
wd_old=$(lsinitrd $TARGET_INITRD -f etc/cmdline.d/00-watchdog.conf)
[[ "$wd_old" = "$wd_new" ]] && return 0
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
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
check_dump_fs_modified
ret=$?
if [ $ret -ne 0 ]; then
return $ret
fi
check_wdt_modified
if [ $? -ne 0 ]; then
echo "Detected change in watchdog state"
return 1
fi
return 0
}
check_rebuild()
2011-07-06 19:25:34 +00:00
{
local capture_capable_initrd="1"
local _force_rebuild force_rebuild="0"
local _force_no_rebuild force_no_rebuild="0"
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
2011-07-06 19:25:34 +00:00
_force_no_rebuild=`grep ^force_no_rebuild $KDUMP_CONFIG_FILE 2>/dev/null`
if [ $? -eq 0 ]; then
force_no_rebuild=`echo $_force_no_rebuild | cut -d' ' -f2`
if [ "$force_no_rebuild" != "0" ] && [ "$force_no_rebuild" != "1" ];then
echo "Error: force_no_rebuild value is invalid"
return 1
fi
fi
_force_rebuild=`grep ^force_rebuild $KDUMP_CONFIG_FILE 2>/dev/null`
if [ $? -eq 0 ]; then
force_rebuild=`echo $_force_rebuild | cut -d' ' -f2`
if [ "$force_rebuild" != "0" ] && [ "$force_rebuild" != "1" ];then
echo "Error: force_rebuild value is invalid"
return 1
fi
fi
if [[ "$force_no_rebuild" == "1" && "$force_rebuild" == "1" ]]; then
echo "Error: force_rebuild and force_no_rebuild are enabled simultaneously in kdump.conf"
return 1
fi
# Will not rebuild kdump initrd
if [ "$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 $TARGET_INITRD | grep ^kdumpbase$ | wc -l)
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 [ $image_time -eq 0 ]; then
echo -n "No kdump initial ramdisk found."; echo
elif [ "$capture_capable_initrd" == "0" ]; then
echo -n "Rebuild $TARGET_INITRD with dump capture support"; echo
elif [ "$force_rebuild" != "0" ]; then
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
echo -n "Force rebuild $TARGET_INITRD"; echo
elif [ "$system_modified" != "0" ]; then
:
else
return 0
2011-07-06 19:25:34 +00:00
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>
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echo "Rebuilding $TARGET_INITRD"
rebuild_initrd
return $?
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}
# Load the kdump kernel specified in /etc/sysconfig/kdump
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# If none is specified, try to load a kdump kernel with the same version
# as the currently running kernel.
load_kdump()
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{
KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")
KDUMP_COMMANDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
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# For secureboot enabled machines, use new kexec file based syscall.
# Old syscall will always fail as it does not have capability to
# to kernel signature verification.
if is_secure_boot_enforced; then
echo "Secure Boot is enabled. Using kexec file based syscall."
KEXEC_ARGS="$KEXEC_ARGS -s"
fi
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$KEXEC $KEXEC_ARGS $standard_kexec_args \
--command-line="$KDUMP_COMMANDLINE" \
--initrd=$TARGET_INITRD $kdump_kernel
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if [ $? == 0 ]; then
echo "kexec: loaded kdump kernel"
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return 0
else
echo "kexec: failed to load kdump kernel" >&2
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return 1
fi
}
check_ssh_config()
{
while read config_opt config_val; do
case "$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 $config_val)
else
echo "WARNING: '$config_val' doesn't exist, using default value '$SSH_KEY_LOCATION'"
fi
;;
path)
SAVE_PATH=$config_val
;;
ssh)
DUMP_TARGET=$config_val
;;
*)
;;
esac
done <<< "$(read_strip_comments $KDUMP_CONFIG_FILE)"
#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
}
check_ssh_target()
{
local _ret
ssh -q -i $SSH_KEY_LOCATION -o BatchMode=yes $DUMP_TARGET mkdir -p $SAVE_PATH
_ret=$?
if [ $_ret -ne 0 ]; then
echo "Could not create $DUMP_TARGET:$SAVE_PATH, you probably need to run \"kdumpctl propagate\"" >&2
return 1
fi
return 0
}
propagate_ssh_key()
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{
check_ssh_config
if [ $? -ne 0 ]; then
echo "No ssh config specified in $KDUMP_CONFIG_FILE. Can't propagate" >&2
exit 1
fi
local KEYFILE=$SSH_KEY_LOCATION
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local errmsg="Failed to propagate ssh key"
#Check to see if we already created key, if not, create it.
if [ -f $KEYFILE ]; then
echo "Using existing keys..."
else
echo -n "Generating new ssh keys... "
/usr/bin/ssh-keygen -t rsa -f $KEYFILE -N "" 2>&1 > /dev/null
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echo "done."
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/'`
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#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
echo $KEYFILE has been added to ~$SSH_USER/.ssh/authorized_keys on $SSH_SERVER
return 0
else
echo $errmsg, $KEYFILE failed in transfer to $SSH_SERVER >&2
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exit 1
fi
}
show_reserved_mem()
{
local mem=$(cat /sys/kernel/kexec_crash_size)
local mem_mb=$(expr $mem / 1024 / 1024)
echo "Reserved "$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 $?
}
save_raw()
{
local kdump_dir
local raw_target
raw_target=$(awk '$1 ~ /^raw$/ { print $2; }' $KDUMP_CONFIG_FILE)
[ -z "$raw_target" ] && return 0
[ -b "$raw_target" ] || {
echo "raw partition $raw_target not found"
return 1
}
check_fs=$(lsblk --nodeps -npo FSTYPE $raw_target)
if [[ $(echo $check_fs | wc -w) -ne 0 ]]; then
echo "Warning: Detected '$check_fs' signature on $raw_target, data loss is expected."
return 0
fi
kdump_dir=`grep ^path $KDUMP_CONFIG_FILE | cut -d' ' -f2-`
if [ -z "${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" ] || {
echo "failed to create $coredir"
return 1
}
if makedumpfile -R $coredir/vmcore <$raw_target >/dev/null 2>&1; then
# dump found
echo "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 "$coredir"
fi
return 0
}
is_dump_target_configured()
{
local _target
_target=$(egrep "^ext[234]|^xfs|^btrfs|^minix|^raw|^ssh|^nfs" /etc/kdump.conf)
[ -n "$_target" ]
}
local_fs_dump_target()
{
local _target
_target=$(egrep "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf)
if [ $? -eq 0 ]; then
echo $_target|awk '{print $2}'
fi
}
path_to_be_relabeled()
{
local _path _target _mnt="/" _rmnt
if is_dump_target_configured; then
_target=$(local_fs_dump_target)
if [[ -n "$_target" ]]; then
_mnt=$(findmnt -k -f -n -r -o TARGET $_target)
if [ -z "$_mnt" ]; then
return
fi
else
return
fi
fi
if is_mount_in_dracut_args; then
return;
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
for _i in $(find $_path); do
_attr=$(getfattr -m "security.selinux" $_i 2>/dev/null)
if [ -z "$_attr" ]; then
restorecon $_i;
fi
done
}
check_fence_kdump_config()
{
local hostname=`hostname`
local ipaddrs=`hostname -I`
local nodes=$(get_option_value "fence_kdump_nodes")
for node in $nodes; do
if [ "$node" = "$hostname" ]; then
echo "Option fence_kdump_nodes cannot contain $hostname"
return 1
fi
# node can be ipaddr
echo $ipaddrs | grep $node > /dev/null
if [ $? -eq 0 ]; then
echo "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
echo "fadump: failed to register"
return 1
fi
echo "fadump: registered successfully"
return 0
}
start_dump()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
start_fadump
else
load_kdump
fi
return $?
}
check_failure_action_config()
{
local default_option
local failure_action
local option="failure_action"
default_option=$(awk '$1 ~ /^default$/ {print $2;}' $KDUMP_CONFIG_FILE)
failure_action=$(awk '$1 ~ /^failure_action$/ {print $2;}' $KDUMP_CONFIG_FILE)
if [ -z "$failure_action" -a -z "$default_option" ]; then
return 0
elif [ -n "$failure_action" -a -n "$default_option" ]; then
echo "Cannot specify 'failure_action' and 'default' option together"
return 1
fi
if [ -n "$default_option" ]; then
option="default"
failure_action="$default_option"
fi
case "$failure_action" in
reboot|halt|poweroff|shell|dump_to_rootfs)
return 0
;;
*)
echo $"Usage kdump.conf: $option {reboot|halt|poweroff|shell|dump_to_rootfs}"
return 1
esac
}
check_final_action_config()
{
local final_action
final_action=$(awk '$1 ~ /^final_action$/ {print $2;}' $KDUMP_CONFIG_FILE)
if [ -z "$final_action" ]; then
return 0
else
case "$final_action" in
reboot|halt|poweroff)
return 0
;;
*)
echo $"Usage kdump.conf: final_action {reboot|halt|poweroff}"
return 1
esac
fi
}
start()
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{
check_dump_feasibility
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
check_config
if [ $? -ne 0 ]; then
echo "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
echo "Starting kdump: [FAILED]"
return 1
fi
check_current_status
if [ $? == 0 ]; then
echo "Kdump already running: [WARNING]"
return 0
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fi
if check_ssh_config; then
if ! check_ssh_target; then
echo "Starting kdump: [FAILED]"
return 1
fi
fi
check_rebuild
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if [ $? != 0 ]; then
echo "Starting kdump: [FAILED]"
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return 1
fi
start_dump
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if [ $? != 0 ]; then
echo "Starting kdump: [FAILED]"
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return 1
fi
echo "Starting kdump: [OK]"
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}
reload()
{
check_current_status
if [ $? -ne 0 ]; then
echo "Kdump is not running: [WARNING]"
return 0
fi
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
reload_fadump
return $?
else
stop_kdump
fi
if [ $? -ne 0 ]; then
echo "Stopping kdump: [FAILED]"
return 1
fi
echo "Stopping kdump: [OK]"
setup_initrd
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
start_dump
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
echo "Starting kdump: [OK]"
}
stop_fadump()
{
echo 0 > $FADUMP_REGISTER_SYS_NODE
if check_current_fadump_status; then
echo "fadump: failed to unregister"
return 1
fi
echo "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
echo "kexec: failed to unload kdump kernel"
return 1
fi
echo "kexec: unloaded kdump kernel"
return 0
}
reload_fadump()
{
echo 1 > $FADUMP_REGISTER_SYS_NODE
if [ $? == 0 ]; then
echo "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
echo "Stopping kdump: [FAILED]"
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return 1
fi
echo "Stopping kdump: [OK]"
return 0
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}
rebuild() {
setup_initrd
if [ $? -ne 0 ]; then
return 1
fi
echo "Rebuilding $TARGET_INITRD"
rebuild_initrd
return $?
}
if [ ! -f "$KDUMP_CONFIG_FILE" ]; then
echo "Error: No kdump config file found!" >&2
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)
echo "Kdump is operational"
EXIT_CODE=0
;;
1)
echo "Kdump is not operational"
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
;;
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*)
echo $"Usage: $0 {start|stop|status|restart|reload|rebuild|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 $1)
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exit $?