962 lines
20 KiB
Bash
Executable File
962 lines
20 KiB
Bash
Executable File
#! /bin/sh
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KEXEC=/sbin/kexec
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KDUMP_KERNELVER=""
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KDUMP_COMMANDLINE=""
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KEXEC_ARGS=""
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KDUMP_CONFIG_FILE="/etc/kdump.conf"
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MKDUMPRD="/sbin/mkdumprd -f"
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SAVE_PATH=/var/crash
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SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
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DUMP_TARGET=""
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TARGET_INITRD=""
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FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
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FADUMP_REGISTER_SYS_NODE="/sys/kernel/fadump_registered"
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#kdump shall be the default dump mode
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DEFAULT_DUMP_MODE="kdump"
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. /lib/kdump/kdump-lib.sh
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standard_kexec_args="-p"
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if [ -f /etc/sysconfig/kdump ]; then
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. /etc/sysconfig/kdump
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fi
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single_instance_lock()
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{
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local rc timeout=5
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exec 9>/var/lock/kdump
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flock -n 9
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rc=$?
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while [ $rc -ne 0 ]; do
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echo "Another app is currently holding the kdump lock; waiting for it to exit..."
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flock -w $timeout 9
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rc=$?
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done
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}
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determine_dump_mode()
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{
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# Check if firmware-assisted dump is enabled
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# if yes, set the dump mode as fadump
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if is_fadump_capable; then
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echo "Dump mode is fadump"
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DEFAULT_DUMP_MODE="fadump"
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fi
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}
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# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
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# Remove a list of kernel parameters from a given kernel cmdline and print the result.
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# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
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remove_cmdline_param()
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{
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local cmdline=$1
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shift
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for arg in $@; do
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cmdline=`echo $cmdline | \
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sed -e "s/\b$arg=[^ ]*\b//g" \
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-e "s/\b$arg\b//g" \
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-e "s/\s\+/ /g"`
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done
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echo $cmdline
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}
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#
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# This function returns the "initial apicid" of the
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# boot cpu (cpu 0) if present.
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#
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get_bootcpu_initial_apicid()
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{
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awk ' \
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BEGIN { CPU = "-1"; } \
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$1=="processor" && $2==":" { CPU = $NF; } \
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CPU=="0" && /initial apicid/ { print $NF; } \
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' \
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/proc/cpuinfo
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}
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#
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# This function appends argument "$2=$3" to string ($1) if not already present.
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#
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append_cmdline()
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{
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local cmdline=$1
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local newstr=${cmdline/$2/""}
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# unchanged str implies argument wasn't there
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if [ "$cmdline" == "$newstr" ]; then
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cmdline="${cmdline} ${2}=${3}"
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fi
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echo $cmdline
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}
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# This function performs a series of edits on the command line
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prepare_cmdline()
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{
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local cmdline;
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if [ -z "$KDUMP_COMMANDLINE" ]; then
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cmdline=`cat /proc/cmdline`
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else
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cmdline=${KDUMP_COMMANDLINE}
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fi
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cmdline=`remove_cmdline_param "$cmdline" crashkernel hugepages hugepagesz panic_on_warn`
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cmdline="${cmdline} ${KDUMP_COMMANDLINE_APPEND}"
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local id=`get_bootcpu_initial_apicid`
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if [ ! -z ${id} ] ; then
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cmdline=`append_cmdline "${cmdline}" disable_cpu_apicid ${id}`
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fi
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echo $cmdline
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}
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save_core()
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{
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coredir="/var/crash/`date +"%Y-%m-%d-%H:%M"`"
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mkdir -p $coredir
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cp --sparse=always /proc/vmcore $coredir/vmcore-incomplete
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if [ $? == 0 ]; then
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mv $coredir/vmcore-incomplete $coredir/vmcore
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echo "saved a vmcore to $coredir"
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else
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echo "failed to save a vmcore to $coredir" >&2
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fi
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# pass the dmesg to Abrt tool if exists, in order
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# to collect the kernel oops message.
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# https://fedorahosted.org/abrt/
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if [ -x /usr/bin/dumpoops ]; then
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makedumpfile --dump-dmesg $coredir/vmcore $coredir/dmesg >/dev/null 2>&1
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dumpoops -d $coredir/dmesg >/dev/null 2>&1
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if [ $? == 0 ]; then
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echo "kernel oops has been collected by abrt tool"
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fi
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fi
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}
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rebuild_fadump_initrd()
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{
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local target_initrd_tmp
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# backup fadump initrd for reference before replacing it
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backup_initrd
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# this file tells the initrd is fadump enabled
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touch /tmp/fadump.initramfs
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target_initrd_tmp="$TARGET_INITRD.tmp"
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$MKDUMPRD $target_initrd_tmp --rebuild $TARGET_INITRD --kver $kdump_kver \
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-i /tmp/fadump.initramfs /etc/fadump.initramfs
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if [ $? != 0 ]; then
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echo "mkdumprd: failed to rebuild initrd with fadump support" >&2
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rm -f /tmp/fadump.initramfs
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return 1
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fi
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rm -f /tmp/fadump.initramfs
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# updating fadump initrd
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mv $target_initrd_tmp $TARGET_INITRD
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sync
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return 0
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}
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rebuild_kdump_initrd()
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{
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$MKDUMPRD $TARGET_INITRD $kdump_kver
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if [ $? != 0 ]; then
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echo "mkdumprd: failed to make kdump initrd" >&2
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return 1
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fi
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return 0
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}
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rebuild_initrd()
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{
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if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
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rebuild_fadump_initrd
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else
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rebuild_kdump_initrd
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fi
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return $?
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}
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#$1: the files to be checked with IFS=' '
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check_exist()
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{
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for file in $1; do
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if [ ! -f "$file" ]; then
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echo -n "Error: $file not found."; echo
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return 1
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fi
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done
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}
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#$1: the files to be checked with IFS=' '
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check_executable()
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{
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for file in $1; do
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if [ ! -x "$file" ]; then
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echo -n "Error: $file is not executable."; echo
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return 1
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fi
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done
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}
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backup_initrd()
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{
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local target_initrd_bak
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# Check if backup initrd is already present.
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target_initrd_bak="$TARGET_INITRD.bak"
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if [ ! -e $target_initrd_bak ];then
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echo "Backing up $TARGET_INITRD"
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cp $TARGET_INITRD $target_initrd_bak
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fi
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}
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check_config()
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{
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local nr
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nr=$(awk 'BEGIN{cnt=0} /^raw|^ssh[[:blank:]]|^nfs|^ext[234]|^xfs|^btrfs|^minix/{cnt++} END{print cnt}' $KDUMP_CONFIG_FILE)
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[ $nr -gt 1 ] && {
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echo "More than one dump targets specified."
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return 1
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}
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while read config_opt config_val; do
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# remove inline comments after the end of a directive.
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config_val=$(strip_comments $config_val)
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case "$config_opt" in
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\#* | "")
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;;
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raw|ext2|ext3|ext4|minix|btrfs|xfs|nfs|ssh|sshkey|path|core_collector|kdump_post|kdump_pre|extra_bins|extra_modules|default|force_rebuild|dracut_args|fence_kdump_args|fence_kdump_nodes)
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[ -z "$config_val" ] && {
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echo "Invalid kdump config value for option $config_opt."
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return 1;
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}
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;;
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net|options|link_delay|disk_timeout|debug_mem_level|blacklist)
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echo "Deprecated kdump config option: $config_opt. Refer to kdump.conf manpage for alternatives."
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return 1
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;;
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*)
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echo "Invalid kdump config option $config_opt"
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return 1;
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;;
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esac
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done < $KDUMP_CONFIG_FILE
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check_default_config || return 1
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check_fence_kdump_config || return 1
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return 0
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}
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# get_pcs_cluster_modified_files <image timestamp>
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# return list of modified file for fence_kdump modified in Pacemaker cluster
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get_pcs_cluster_modified_files()
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{
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local image_time=$1
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local time_stamp
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local modified_files
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is_generic_fence_kdump && return 1
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is_pcs_fence_kdump || return 1
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time_stamp=`pcs cluster cib | xmllint --xpath 'string(/cib/@cib-last-written)' - | \
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xargs -0 date +%s --date`
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if [ -n $time_stamp -a $time_stamp -gt $image_time ]; then
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modified_files="cluster-cib"
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fi
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if [ -f $FENCE_KDUMP_CONFIG_FILE ]; then
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time_stamp=`stat -c "%Y" $FENCE_KDUMP_CONFIG_FILE`
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if [ "$time_stamp" -gt "$image_time" ]; then
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modified_files="$modified_files $FENCE_KDUMP_CONFIG_FILE"
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fi
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fi
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echo $modified_files
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}
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check_boot_dir()
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{
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#If user specify a boot dir for kdump kernel, let's use it. Otherwise
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#check whether it's a atomic host. If yes parse the subdirectory under
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#/boot; If not just find it under /boot.
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[ -n "$KDUMP_BOOTDIR" ] && return
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if ! is_atomic || [ "$(uname -m)" = "s390x" ]; then
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KDUMP_BOOTDIR="/boot"
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else
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eval $(cat /proc/cmdline| grep "BOOT_IMAGE" | cut -d' ' -f1)
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KDUMP_BOOTDIR="/boot"$(dirname $BOOT_IMAGE)
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fi
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}
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setup_target_initrd()
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{
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if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
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TARGET_INITRD="${KDUMP_BOOTDIR}/initramfs-${kdump_kver}.img"
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if [ ! -s "$TARGET_INITRD" ]; then
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echo "Error: No initrd found to rebuild!"
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return 1
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fi
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else
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TARGET_INITRD="${KDUMP_BOOTDIR}/initramfs-${kdump_kver}kdump.img"
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fi
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}
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check_rebuild()
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{
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local extra_modules modified_files=""
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local _force_rebuild force_rebuild="0"
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local initramfs_has_fadump
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check_boot_dir
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if [ -z "$KDUMP_KERNELVER" ]; then
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kdump_kver=`uname -r`
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else
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kdump_kver=$KDUMP_KERNELVER
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fi
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kdump_kernel="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
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setup_target_initrd
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if [ $? -ne 0 ]; then
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return 1
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fi
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_force_rebuild=`grep ^force_rebuild $KDUMP_CONFIG_FILE 2>/dev/null`
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if [ $? -eq 0 ]; then
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force_rebuild=`echo $_force_rebuild | cut -d' ' -f2`
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if [ "$force_rebuild" != "0" ] && [ "$force_rebuild" != "1" ];then
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echo "Error: force_rebuild value is invalid"
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return 1
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fi
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fi
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#will rebuild every time if extra_modules are specified
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extra_modules=`grep ^extra_modules $KDUMP_CONFIG_FILE`
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[ -n "$extra_modules" ] && force_rebuild="1"
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#check to see if dependent files has been modified
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#since last build of the image file
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if [ -f $TARGET_INITRD ]; then
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image_time=`stat -c "%Y" $TARGET_INITRD 2>/dev/null`
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else
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image_time=0
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fi
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#also rebuild when Pacemaker cluster conf is changed and fence kdump is enabled.
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modified_files=$(get_pcs_cluster_modified_files $image_time)
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EXTRA_BINS=`grep ^kdump_post $KDUMP_CONFIG_FILE | cut -d\ -f2`
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CHECK_FILES=`grep ^kdump_pre $KDUMP_CONFIG_FILE | cut -d\ -f2`
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EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
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CHECK_FILES=`grep ^extra_bins $KDUMP_CONFIG_FILE | cut -d\ -f2-`
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EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
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files="$KDUMP_CONFIG_FILE $kdump_kernel $EXTRA_BINS /etc/fstab"
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check_exist "$files" && check_executable "$EXTRA_BINS"
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[ $? -ne 0 ] && return 1
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for file in $files; do
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time_stamp=`stat -c "%Y" $file`
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if [ "$time_stamp" -gt "$image_time" ]; then
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modified_files="$modified_files $file"
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fi
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done
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#check if target initrd has fadump support
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if [ "$DEFAULT_DUMP_MODE" = "fadump" ] && [ -f "$TARGET_INITRD" ]; then
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initramfs_has_fadump=`lsinitrd -m $TARGET_INITRD | grep ^kdumpbase$ | wc -l`
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fi
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if [ $image_time -eq 0 ]; then
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echo -n "No kdump initial ramdisk found."; echo
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elif [ $DEFAULT_DUMP_MODE == "fadump" ] && [ "$initramfs_has_fadump" -eq "0" ]; then
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echo "$TARGET_INITRD has no fadump support"
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elif [ "$force_rebuild" != "0" ]; then
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echo -n "Force rebuild $TARGET_INITRD"; echo
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elif [ -n "$modified_files" ]; then
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echo "Detected change(s) in the following file(s):"
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echo -n " "; echo "$modified_files" | sed 's/\s/\n /g'
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else
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return 0
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fi
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echo "Rebuilding $TARGET_INITRD"
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rebuild_initrd
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return $?
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}
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# This function check iomem and determines if we have more than
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# 4GB of ram available. Returns 1 if we do, 0 if we dont
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need_64bit_headers()
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{
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return `tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); \
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print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }'`
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}
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# Load the kdump kerel specified in /etc/sysconfig/kdump
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# If none is specified, try to load a kdump kernel with the same version
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# as the currently running kernel.
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load_kdump()
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{
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MEM_RESERVED=$(cat /sys/kernel/kexec_crash_size)
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if [ $MEM_RESERVED -eq 0 ]
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then
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echo "No memory reserved for crash kernel." >&2
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return 1
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fi
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ARCH=`uname -m`
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if [ "$ARCH" == "i686" -o "$ARCH" == "i386" ]
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then
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need_64bit_headers
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if [ $? == 1 ]
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then
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FOUND_ELF_ARGS=`echo $KEXEC_ARGS | grep elf32-core-headers`
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if [ -n "$FOUND_ELF_ARGS" ]
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then
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echo -n "Warning: elf32-core-headers overrides correct elf64 setting"
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echo
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else
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KEXEC_ARGS="$KEXEC_ARGS --elf64-core-headers"
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fi
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else
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FOUND_ELF_ARGS=`echo $KEXEC_ARGS | grep elf64-core-headers`
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if [ -z "$FOUND_ELF_ARGS" ]
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then
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KEXEC_ARGS="$KEXEC_ARGS --elf32-core-headers"
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fi
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fi
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fi
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KDUMP_COMMANDLINE=`prepare_cmdline`
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|
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# For secureboot enabled machines, use new kexec file based syscall.
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# Old syscall will always fail as it does not have capability to
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# to kernel signature verification.
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if is_secure_boot_enforced; then
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echo "Secure Boot is enabled. Using kexec file based syscall."
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KEXEC_ARGS="$KEXEC_ARGS -s"
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fi
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|
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$KEXEC $KEXEC_ARGS $standard_kexec_args \
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--command-line="$KDUMP_COMMANDLINE" \
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--initrd=$TARGET_INITRD $kdump_kernel
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if [ $? == 0 ]; then
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echo "kexec: loaded kdump kernel"
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return 0
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else
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echo "kexec: failed to load kdump kernel" >&2
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return 1
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fi
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}
|
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|
|
check_ssh_config()
|
|
{
|
|
while read config_opt config_val; do
|
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# remove inline comments after the end of a directive.
|
|
config_val=$(strip_comments $config_val)
|
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case "$config_opt" in
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sshkey)
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if [ -f "$config_val" ]; then
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# canonicalize the path
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SSH_KEY_LOCATION=$(/usr/bin/readlink -m $config_val)
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else
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echo "WARNING: '$config_val' doesn't exist, using default value '$SSH_KEY_LOCATION'"
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fi
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;;
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path)
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SAVE_PATH=$config_val
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;;
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ssh)
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DUMP_TARGET=$config_val
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;;
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*)
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;;
|
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esac
|
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done < $KDUMP_CONFIG_FILE
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|
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#make sure they've configured kdump.conf for ssh dumps
|
|
local SSH_TARGET=`echo -n $DUMP_TARGET | sed -n '/.*@/p'`
|
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if [ -z "$SSH_TARGET" ]; then
|
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return 1
|
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fi
|
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return 0
|
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}
|
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|
|
check_ssh_target()
|
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{
|
|
local _ret
|
|
ssh -q -i $SSH_KEY_LOCATION -o BatchMode=yes $DUMP_TARGET mkdir -p $SAVE_PATH
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_ret=$?
|
|
if [ $_ret -ne 0 ]; then
|
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echo "Could not create $DUMP_TARGET:$SAVE_PATH, you probably need to run \"kdumpctl propagate\"" >&2
|
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return 1
|
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fi
|
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return 0
|
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}
|
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|
|
propagate_ssh_key()
|
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{
|
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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
|
|
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
|
|
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/'`
|
|
|
|
#now send the found key to the found server
|
|
ssh-copy-id -i $KEYFILE $SSH_USER@$SSH_SERVER
|
|
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
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
is_fadump_capable()
|
|
{
|
|
# Check if firmware-assisted dump is enabled
|
|
# if no, fallback to kdump check
|
|
if [ -f $FADUMP_ENABLED_SYS_NODE ]; then
|
|
rc=`cat $FADUMP_ENABLED_SYS_NODE`
|
|
[ $rc -eq 1 ] && return 0
|
|
fi
|
|
return 1
|
|
}
|
|
|
|
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_kdump_status()
|
|
{
|
|
rc=`cat /sys/kernel/kexec_crash_loaded`
|
|
if [ $rc == 1 ]; then
|
|
return 0
|
|
else
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
check_current_status()
|
|
{
|
|
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
|
|
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
|
|
}
|
|
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 "$coredir"
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
get_save_path()
|
|
{
|
|
local _save_path=$(grep "^path" /etc/kdump.conf|awk '{print $2}')
|
|
if [ -z "$_save_path" ]; then
|
|
_save_path="/var/crash"
|
|
fi
|
|
|
|
echo $_save_path
|
|
}
|
|
|
|
is_dump_target_configured()
|
|
{
|
|
local _target
|
|
|
|
_target=$(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
|
|
|
|
_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 $_i;
|
|
fi
|
|
done
|
|
}
|
|
|
|
# Check if secure boot is being enforced.
|
|
#
|
|
# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
|
|
# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
|
|
# bytes are the attributes associated with the variable and can safely be
|
|
# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
|
|
# is 1 and SetupMode is 0, then secure boot is being enforced.
|
|
#
|
|
# Assume efivars is mounted at /sys/firmware/efi/efivars.
|
|
is_secure_boot_enforced()
|
|
{
|
|
local secure_boot_file setup_mode_file
|
|
local secure_boot_byte setup_mode_byte
|
|
|
|
secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-* 2>/dev/null)
|
|
setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-* 2>/dev/null)
|
|
|
|
if [ -f "$secure_boot_file" ] && [ -f "$setup_mode_file" ]; then
|
|
secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' $secure_boot_file|cut -d' ' -f 5)
|
|
setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' $setup_mode_file|cut -d' ' -f 5)
|
|
|
|
if [ "$secure_boot_byte" = "1" ] && [ "$setup_mode_byte" = "0" ]; then
|
|
return 0
|
|
fi
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
check_kdump_feasibility()
|
|
{
|
|
if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
|
|
echo "Kdump is not supported on this kernel"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
check_fence_kdump_config()
|
|
{
|
|
local hostname=`hostname`
|
|
local nodes=$(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
|
|
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 $?
|
|
}
|
|
|
|
check_default_config()
|
|
{
|
|
local default_option
|
|
|
|
default_option=$(awk '$1 ~ /^default$/ {print $2;}' $KDUMP_CONFIG_FILE)
|
|
if [ -z "$default_option" ]; then
|
|
return 0
|
|
else
|
|
case "$default_option" in
|
|
reboot|halt|poweroff|shell|dump_to_rootfs)
|
|
return 0
|
|
;;
|
|
*)
|
|
echo $"Usage kdump.conf: default {reboot|halt|poweroff|shell|dump_to_rootfs}"
|
|
return 1
|
|
esac
|
|
fi
|
|
}
|
|
|
|
start()
|
|
{
|
|
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_dump_feasibility
|
|
if [ $? -ne 0 ]; then
|
|
echo "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
check_current_status
|
|
if [ $? == 0 ]; then
|
|
echo "Kdump already running: [WARNING]"
|
|
return 0
|
|
fi
|
|
|
|
if check_ssh_config; then
|
|
if ! check_ssh_target; then
|
|
echo "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
fi
|
|
|
|
check_rebuild
|
|
if [ $? != 0 ]; then
|
|
echo "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
start_dump
|
|
if [ $? != 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()
|
|
{
|
|
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
|
|
}
|
|
|
|
stop()
|
|
{
|
|
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
|
|
stop_fadump
|
|
else
|
|
stop_kdump
|
|
fi
|
|
|
|
if [ $? != 0 ]; then
|
|
echo "Stopping kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
echo "Stopping kdump: [OK]"
|
|
return 0
|
|
}
|
|
|
|
if [ ! -f "$KDUMP_CONFIG_FILE" ]; then
|
|
echo "Error: No kdump config file found!" >&2
|
|
exit 1
|
|
fi
|
|
|
|
main ()
|
|
{
|
|
# Determine if the dump mode is kdump or fadump
|
|
determine_dump_mode
|
|
|
|
case "$1" in
|
|
start)
|
|
if [ -s /proc/vmcore ]; then
|
|
save_core
|
|
reboot
|
|
else
|
|
start
|
|
fi
|
|
;;
|
|
stop)
|
|
stop
|
|
;;
|
|
status)
|
|
EXIT_CODE=0
|
|
check_current_status
|
|
case "$?" in
|
|
0)
|
|
echo "Kdump is operational"
|
|
EXIT_CODE=0
|
|
;;
|
|
1)
|
|
echo "Kdump is not operational"
|
|
EXIT_CODE=3
|
|
;;
|
|
esac
|
|
exit $EXIT_CODE
|
|
;;
|
|
restart)
|
|
stop
|
|
start
|
|
;;
|
|
condrestart)
|
|
;;
|
|
propagate)
|
|
propagate_ssh_key
|
|
;;
|
|
*)
|
|
echo $"Usage: $0 {start|stop|status|restart|propagate}"
|
|
exit 1
|
|
esac
|
|
}
|
|
|
|
# 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)
|
|
|
|
exit $?
|