1871 lines
48 KiB
Bash
Executable File
1871 lines
48 KiB
Bash
Executable File
#!/bin/bash
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KEXEC=/sbin/kexec
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KDUMP_KERNELVER=""
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KDUMP_KERNEL=""
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KDUMP_COMMANDLINE=""
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KEXEC_ARGS=""
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KDUMP_LOG_PATH="/var/log"
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MKDUMPRD="/sbin/mkdumprd -f"
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MKFADUMPRD="/sbin/mkfadumprd"
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DRACUT_MODULES_FILE="/usr/lib/dracut/modules.txt"
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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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DEFAULT_INITRD=""
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DEFAULT_INITRD_BAK=""
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INITRD_CHECKSUM_LOCATION=""
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KDUMP_INITRD=""
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TARGET_INITRD=""
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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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image_time=0
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standard_kexec_args="-d -p"
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# Some default values in case /etc/sysconfig/kdump doesn't include
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KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug"
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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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[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
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. $dracutbasedir/dracut-functions.sh
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. /lib/kdump/kdump-lib.sh
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. /lib/kdump/kdump-logger.sh
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#initiate the kdump logger
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if ! dlog_init; then
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echo "failed to initiate the kdump logger."
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exit 1
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fi
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single_instance_lock()
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{
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local rc timeout=5 lockfile
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if [[ -d /run/lock ]]; then
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lockfile=/run/lock/kdump
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else
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# when updating package using virt-customize, /run/lock doesn't exist
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lockfile=/tmp/kdump.lock
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fi
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if ! exec 9> $lockfile; then
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derror "Create file lock failed"
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exit 1
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fi
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flock -n 9
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rc=$?
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while [[ $rc -ne 0 ]]; do
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dinfo "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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dinfo "Dump mode is fadump"
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DEFAULT_DUMP_MODE="fadump"
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fi
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ddebug "DEFAULT_DUMP_MODE=$DEFAULT_DUMP_MODE"
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}
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save_core()
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{
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coredir="/var/crash/$(date +"%Y-%m-%d-%H:%M")"
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mkdir -p "$coredir"
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ddebug "cp --sparse=always /proc/vmcore $coredir/vmcore-incomplete"
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if cp --sparse=always /proc/vmcore "$coredir/vmcore-incomplete"; then
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mv "$coredir/vmcore-incomplete" "$coredir/vmcore"
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dinfo "saved a vmcore to $coredir"
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else
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derror "failed to save a vmcore to $coredir"
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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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ddebug "makedumpfile --dump-dmesg $coredir/vmcore $coredir/dmesg"
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makedumpfile --dump-dmesg "$coredir/vmcore" "$coredir/dmesg" > /dev/null 2>&1
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ddebug "dumpoops -d $coredir/dmesg"
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if dumpoops -d "$coredir/dmesg" > /dev/null 2>&1; then
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dinfo "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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if ! $MKFADUMPRD "$DEFAULT_INITRD_BAK" "$TARGET_INITRD" --kver "$KDUMP_KERNELVER"; then
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derror "mkfadumprd: failed to make fadump initrd"
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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_earlykdump_is_enabled()
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{
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grep -q -w "rd.earlykdump" /proc/cmdline
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return $?
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}
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rebuild_kdump_initrd()
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{
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ddebug "rebuild kdump initrd: $MKDUMPRD $TARGET_INITRD $KDUMP_KERNELVER"
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if ! $MKDUMPRD "$TARGET_INITRD" "$KDUMP_KERNELVER"; then
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derror "mkdumprd: failed to make kdump initrd"
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return 1
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fi
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if check_earlykdump_is_enabled; then
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dwarn "Tips: If early kdump is enabled, also require rebuilding the system initramfs to make the changes take effect for early kdump."
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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 [[ ! -w $(dirname "$TARGET_INITRD") ]]; then
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derror "$(dirname "$TARGET_INITRD") does not have write permission. Cannot rebuild $TARGET_INITRD"
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return 1
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fi
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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 [[ ! -e $file ]]; then
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derror "Error: $file not found."
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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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derror "Error: $file is not executable."
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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_default_initrd()
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{
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ddebug "backup default initrd: $DEFAULT_INITRD"
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if [[ ! -f $DEFAULT_INITRD ]]; then
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return
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fi
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if [[ ! -e $DEFAULT_INITRD_BAK ]]; then
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dinfo "Backing up $DEFAULT_INITRD before rebuild."
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# save checksum to verify before restoring
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sha1sum "$DEFAULT_INITRD" > "$INITRD_CHECKSUM_LOCATION"
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if ! cp "$DEFAULT_INITRD" "$DEFAULT_INITRD_BAK"; then
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dwarn "WARNING: failed to backup $DEFAULT_INITRD."
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rm -f -- "$INITRD_CHECKSUM_LOCATION"
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rm -f -- "$DEFAULT_INITRD_BAK"
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fi
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fi
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}
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restore_default_initrd()
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{
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ddebug "restore default initrd: $DEFAULT_INITRD"
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if [[ ! -f $DEFAULT_INITRD ]]; then
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return
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fi
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# If a backup initrd exists, we must be switching back from
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# fadump to kdump. Restore the original default initrd.
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if [[ -f $DEFAULT_INITRD_BAK ]] && [[ -f $INITRD_CHECKSUM_LOCATION ]]; then
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# verify checksum before restoring
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backup_checksum=$(sha1sum "$DEFAULT_INITRD_BAK" | awk '{ print $1 }')
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default_checksum=$(awk '{ print $1 }' "$INITRD_CHECKSUM_LOCATION")
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if [[ $default_checksum != "$backup_checksum" ]]; then
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dwarn "WARNING: checksum mismatch! Can't restore original initrd.."
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else
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rm -f $INITRD_CHECKSUM_LOCATION
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if mv "$DEFAULT_INITRD_BAK" "$DEFAULT_INITRD"; then
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derror "Restoring original initrd as fadump mode is disabled."
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sync
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fi
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fi
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fi
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}
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check_config()
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{
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local -A _opt_rec
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while read -r config_opt config_val; do
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case "$config_opt" in
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dracut_args)
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if [[ $config_val == *--mount* ]]; then
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if [[ $(echo "$config_val" | grep -o "\-\-mount" | wc -l) -ne 1 ]]; then
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derror 'Multiple mount targets specified in one "dracut_args".'
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return 1
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fi
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config_opt=_target
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fi
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;;
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raw)
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if [[ -d "/proc/device-tree/ibm,opal/dump" ]]; then
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dwarn "WARNING: Won't capture opalcore when 'raw' dump target is used."
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fi
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config_opt=_target
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;;
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ext[234] | minix | btrfs | xfs | nfs | ssh | virtiofs)
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config_opt=_target
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;;
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sshkey | path | core_collector | kdump_post | kdump_pre | extra_bins | extra_modules | failure_action | default | final_action | force_rebuild | force_no_rebuild | fence_kdump_args | fence_kdump_nodes | auto_reset_crashkernel) ;;
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net | options | link_delay | disk_timeout | debug_mem_level | blacklist)
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derror "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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continue
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;;
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*)
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derror "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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if [[ -z $config_val ]]; then
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derror "Invalid kdump config value for option '$config_opt'"
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return 1
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fi
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if [[ -n ${_opt_rec[$config_opt]} ]]; then
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if [[ $config_opt == _target ]]; then
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derror "More than one dump targets specified"
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else
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derror "Duplicated kdump config value of option $config_opt"
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fi
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return 1
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fi
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_opt_rec[$config_opt]="$config_val"
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done <<< "$(kdump_read_conf)"
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check_failure_action_config || return 1
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check_final_action_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 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)' - | xargs -0 date +%s --date)
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if [[ -n $time_stamp ]] && [[ $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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setup_initrd()
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{
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if ! prepare_kdump_bootinfo; then
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derror "failed to prepare for kdump bootinfo."
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return 1
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fi
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DEFAULT_INITRD_BAK="$KDUMP_BOOTDIR/.$(basename "$DEFAULT_INITRD").default"
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INITRD_CHECKSUM_LOCATION="$DEFAULT_INITRD_BAK.checksum"
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if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
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TARGET_INITRD="$DEFAULT_INITRD"
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# backup initrd for reference before replacing it
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# with fadump aware initrd
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backup_default_initrd
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else
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TARGET_INITRD="$KDUMP_INITRD"
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# check if a backup of default initrd exists. If yes,
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# it signifies a switch from fadump mode. So, restore
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# the backed up default initrd.
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restore_default_initrd
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fi
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}
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check_files_modified()
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{
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local modified_files=""
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#also rebuild when Pacemaker cluster conf is changed and fence kdump is enabled.
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modified_files=$(get_pcs_cluster_modified_files)
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EXTRA_BINS=$(kdump_get_conf_val kdump_post)
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CHECK_FILES=$(kdump_get_conf_val kdump_pre)
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HOOKS="/etc/kdump/post.d/ /etc/kdump/pre.d/"
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if [[ -d /etc/kdump/post.d ]]; then
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for file in /etc/kdump/post.d/*; do
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if [[ -x $file ]]; then
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POST_FILES="$POST_FILES $file"
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fi
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done
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fi
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if [[ -d /etc/kdump/pre.d ]]; then
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for file in /etc/kdump/pre.d/*; do
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if [[ -x $file ]]; then
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PRE_FILES="$PRE_FILES $file"
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fi
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done
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fi
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HOOKS="$HOOKS $POST_FILES $PRE_FILES"
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CORE_COLLECTOR=$(kdump_get_conf_val core_collector | awk '{print $1}')
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CORE_COLLECTOR=$(type -P "$CORE_COLLECTOR")
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# POST_FILES and PRE_FILES are already checked against executable, need not to check again.
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EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
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CHECK_FILES=$(kdump_get_conf_val extra_bins)
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EXTRA_BINS="$EXTRA_BINS $CHECK_FILES"
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files="$KDUMP_CONFIG_FILE $KDUMP_KERNEL $EXTRA_BINS $CORE_COLLECTOR"
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[[ -e /etc/fstab ]] && files="$files /etc/fstab"
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# Check for any updated extra module
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EXTRA_MODULES="$(kdump_get_conf_val extra_modules)"
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if [[ -n $EXTRA_MODULES ]]; then
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if [[ -e /lib/modules/$KDUMP_KERNELVER/modules.dep ]]; then
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files="$files /lib/modules/$KDUMP_KERNELVER/modules.dep"
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fi
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for _module in $EXTRA_MODULES; do
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if _module_file="$(modinfo --set-version "$KDUMP_KERNELVER" --filename "$_module" 2> /dev/null)"; then
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files="$files $_module_file"
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for _dep_modules in $(modinfo -F depends "$_module" | tr ',' ' '); do
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files="$files $(modinfo --set-version "$KDUMP_KERNELVER" --filename "$_dep_modules" 2> /dev/null)"
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done
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else
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# If it's not a module nor builtin, give an error
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if ! (modprobe --set-version "$KDUMP_KERNELVER" --dry-run "$_module" &> /dev/null); then
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dwarn "Module $_module not found"
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fi
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fi
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done
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fi
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# HOOKS is mandatory and need to check the modification time
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files="$files $HOOKS"
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is_lvm2_thinp_dump_target && files="$files $LVM_CONF"
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check_exist "$files" && check_executable "$EXTRA_BINS" || return 2
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for file in $files; do
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if [[ -e $file ]]; then
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time_stamp=$(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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if [[ -L $file ]]; then
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file=$(readlink -m "$file")
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time_stamp=$(stat -c "%Y" "$file")
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if [[ $time_stamp -gt $image_time ]]; then
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modified_files="$modified_files $file"
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fi
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fi
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else
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dwarn "$file doesn't exist"
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fi
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done
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if [[ -n $modified_files ]]; then
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dinfo "Detected change(s) in the following file(s): $modified_files"
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return 1
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fi
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return 0
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}
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check_drivers_modified()
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{
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local _target _new_drivers _old_drivers _module_name _module_filename
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# If it's dump target is on block device, detect the block driver
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_target=$(get_block_dump_target)
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if [[ -n $_target ]]; then
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_record_block_drivers()
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{
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local _drivers
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_drivers=$(udevadm info -a "/dev/block/$1" | sed -n 's/\s*DRIVERS=="\(\S\+\)"/\1/p')
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for _driver in $_drivers; do
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if ! [[ " $_new_drivers " == *" $_driver "* ]]; then
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_new_drivers="$_new_drivers $_driver"
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fi
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done
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ddebug "MAJ:MIN=$1 drivers='$_drivers'"
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}
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check_block_and_slaves_all _record_block_drivers "$(get_maj_min "$_target")"
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fi
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# Include watchdog drivers if watchdog module is not omitted
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is_dracut_mod_omitted watchdog || _new_drivers+=" $(get_watchdog_drvs)"
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[[ -z $_new_drivers ]] && return 0
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if is_fadump_capable; then
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_old_drivers="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/fadump-kernel-modules.txt | tr '\n' ' ')"
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else
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_old_drivers="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/hostonly-kernel-modules.txt | tr '\n' ' ')"
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fi
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ddebug "Modules required for kdump: '$_new_drivers'"
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ddebug "Modules included in old initramfs: '$_old_drivers'"
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for _driver in $_new_drivers; do
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# Skip deprecated/invalid driver name or built-in module
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_module_name=$(modinfo --set-version "$KDUMP_KERNELVER" -F name "$_driver" 2> /dev/null)
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_module_filename=$(modinfo --set-version "$KDUMP_KERNELVER" -n "$_driver" 2> /dev/null)
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if [[ -z $_module_name ]] || [[ -z $_module_filename ]] || [[ $_module_filename == *"(builtin)"* ]]; then
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continue
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fi
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if ! [[ " $_old_drivers " == *" $_module_name "* ]]; then
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dinfo "Detected change in block device driver, new loaded module: $_module_name"
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return 1
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fi
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done
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}
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check_fs_modified()
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{
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local _old_dev _old_mntpoint _old_fstype
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local _new_dev _new_mntpoint _new_fstype
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local _target _dracut_args
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# No need to check in case of mount target specified via "dracut_args".
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if is_mount_in_dracut_args; then
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return 0
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fi
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# No need to check in case of raw target.
|
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# Currently we do not check also if ssh/nfs/virtiofs/thinp target is specified
|
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if is_ssh_dump_target || is_nfs_dump_target || is_raw_dump_target ||
|
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is_virtiofs_dump_target || is_lvm2_thinp_dump_target; then
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return 0
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fi
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|
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_target=$(get_block_dump_target)
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_new_fstype=$(get_fs_type_from_target "$_target")
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if [[ -z $_target ]] || [[ -z $_new_fstype ]]; then
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derror "Dump target is invalid"
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return 2
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fi
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|
|
ddebug "_target=$_target _new_fstype=$_new_fstype"
|
|
_new_dev=$(kdump_get_persistent_dev "$_target")
|
|
if [[ -z $_new_dev ]]; then
|
|
perror "Get persistent device name failed"
|
|
return 2
|
|
fi
|
|
|
|
_new_mntpoint="$(get_kdump_mntpoint_from_target "$_target")"
|
|
_dracut_args=$(lsinitrd "$TARGET_INITRD" -f usr/lib/dracut/build-parameter.txt)
|
|
if [[ -z $_dracut_args ]]; then
|
|
dwarn "Warning: No dracut arguments found in initrd"
|
|
return 0
|
|
fi
|
|
|
|
# if --mount argument present then match old and new target, mount
|
|
# point and file system. If any of them mismatches then rebuild
|
|
if echo "$_dracut_args" | grep -q "\-\-mount"; then
|
|
# shellcheck disable=SC2046
|
|
set -- $(echo "$_dracut_args" | awk -F "--mount '" '{print $2}' | cut -d' ' -f1,2,3)
|
|
_old_dev=$1
|
|
_old_mntpoint=$2
|
|
_old_fstype=$3
|
|
[[ $_new_dev == "$_old_dev" && $_new_mntpoint == "$_old_mntpoint" && $_new_fstype == "$_old_fstype" ]] && return 0
|
|
# otherwise rebuild if target device is not a root device
|
|
else
|
|
[[ $_target == "$(get_root_fs_device)" ]] && return 0
|
|
fi
|
|
|
|
dinfo "Detected change in File System"
|
|
return 1
|
|
}
|
|
|
|
# returns 0 if system is not modified
|
|
# returns 1 if system is modified
|
|
# returns 2 if system modification is invalid
|
|
check_system_modified()
|
|
{
|
|
local ret
|
|
|
|
[[ -f $TARGET_INITRD ]] || return 1
|
|
|
|
check_files_modified
|
|
ret=$?
|
|
if [[ $ret -ne 0 ]]; then
|
|
return $ret
|
|
fi
|
|
|
|
check_fs_modified
|
|
ret=$?
|
|
if [[ $ret -ne 0 ]]; then
|
|
return $ret
|
|
fi
|
|
|
|
check_drivers_modified
|
|
ret=$?
|
|
if [[ $ret -ne 0 ]]; then
|
|
return $ret
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
check_rebuild()
|
|
{
|
|
local capture_capable_initrd="1"
|
|
local force_rebuild force_no_rebuild
|
|
local ret system_modified="0"
|
|
|
|
setup_initrd || return 1
|
|
|
|
force_no_rebuild=$(kdump_get_conf_val force_no_rebuild)
|
|
force_no_rebuild=${force_no_rebuild:-0}
|
|
if [[ $force_no_rebuild != "0" ]] && [[ $force_no_rebuild != "1" ]]; then
|
|
derror "Error: force_no_rebuild value is invalid"
|
|
return 1
|
|
fi
|
|
|
|
force_rebuild=$(kdump_get_conf_val force_rebuild)
|
|
force_rebuild=${force_rebuild:-0}
|
|
if [[ $force_rebuild != "0" ]] && [[ $force_rebuild != "1" ]]; then
|
|
derror "Error: force_rebuild value is invalid"
|
|
return 1
|
|
fi
|
|
|
|
if [[ $force_no_rebuild == "1" && $force_rebuild == "1" ]]; then
|
|
derror "Error: force_rebuild and force_no_rebuild are enabled simultaneously in kdump.conf"
|
|
return 1
|
|
fi
|
|
|
|
# Will not rebuild kdump initrd
|
|
if [[ $force_no_rebuild == "1" ]]; then
|
|
return 0
|
|
fi
|
|
|
|
#check to see if dependent files has been modified
|
|
#since last build of the image file
|
|
if [[ -f $TARGET_INITRD ]]; then
|
|
image_time=$(stat -c "%Y" "$TARGET_INITRD" 2> /dev/null)
|
|
|
|
#in case of fadump mode, check whether the default/target
|
|
#initrd is already built with dump capture capability
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
capture_capable_initrd=$(lsinitrd -f $DRACUT_MODULES_FILE "$TARGET_INITRD" | grep -c -e ^kdumpbase$ -e ^zz-fadumpinit$)
|
|
fi
|
|
fi
|
|
|
|
check_system_modified
|
|
ret=$?
|
|
if [[ $ret -eq 2 ]]; then
|
|
return 1
|
|
elif [[ $ret -eq 1 ]]; then
|
|
system_modified="1"
|
|
fi
|
|
|
|
if [[ $image_time -eq 0 ]]; then
|
|
dinfo "No kdump initial ramdisk found."
|
|
elif [[ $capture_capable_initrd == "0" ]]; then
|
|
dinfo "Rebuild $TARGET_INITRD with dump capture support"
|
|
elif [[ $force_rebuild != "0" ]]; then
|
|
dinfo "Force rebuild $TARGET_INITRD"
|
|
elif [[ $system_modified != "0" ]]; then
|
|
:
|
|
else
|
|
return 0
|
|
fi
|
|
|
|
dinfo "Rebuilding $TARGET_INITRD"
|
|
rebuild_initrd
|
|
return $?
|
|
}
|
|
|
|
# On ppc64le LPARs, the keys trusted by firmware do not end up in
|
|
# .builtin_trusted_keys. So instead, add the key to the .ima keyring
|
|
function load_kdump_kernel_key()
|
|
{
|
|
# this is only called inside is_secure_boot_enforced,
|
|
# no need to retest
|
|
|
|
# this is only required if DT /ibm,secure-boot is a file.
|
|
# if it is a dir, we are on OpenPower and don't need this.
|
|
if ! [[ -f /proc/device-tree/ibm,secure-boot ]]; then
|
|
return
|
|
fi
|
|
|
|
KDUMP_KEY_ID=$(keyctl padd asymmetric kernelkey-$RANDOM %:.ima < "/usr/share/doc/kernel-keys/$KDUMP_KERNELVER/kernel-signing-ppc.cer")
|
|
}
|
|
|
|
# remove a previously loaded key. There's no real security implication
|
|
# to leaving it around, we choose to do this because it makes it easier
|
|
# to be idempotent and so as to reduce the potential for confusion.
|
|
function remove_kdump_kernel_key()
|
|
{
|
|
if [[ -z $KDUMP_KEY_ID ]]; then
|
|
return
|
|
fi
|
|
|
|
keyctl unlink "$KDUMP_KEY_ID" %:.ima
|
|
}
|
|
|
|
# Load the kdump kernel specified in /etc/sysconfig/kdump
|
|
# If none is specified, try to load a kdump kernel with the same version
|
|
# as the currently running kernel.
|
|
load_kdump()
|
|
{
|
|
local ret
|
|
|
|
KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")
|
|
KDUMP_COMMANDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
|
|
|
|
# For secureboot enabled machines, use new kexec file based syscall.
|
|
# Old syscall will always fail as it does not have capability to
|
|
# to kernel signature verification.
|
|
if is_secure_boot_enforced; then
|
|
dinfo "Secure Boot is enabled. Using kexec file based syscall."
|
|
KEXEC_ARGS="$KEXEC_ARGS -s"
|
|
load_kdump_kernel_key
|
|
fi
|
|
|
|
ddebug "$KEXEC $KEXEC_ARGS $standard_kexec_args --command-line=$KDUMP_COMMANDLINE --initrd=$TARGET_INITRD $KDUMP_KERNEL"
|
|
|
|
# The '12' represents an intermediate temporary file descriptor
|
|
# to store the standard error file descriptor '2', and later
|
|
# restore the error file descriptor with the file descriptor '12'
|
|
# and release it.
|
|
exec 12>&2
|
|
exec 2>> $KDUMP_LOG_PATH/kdump.log
|
|
chmod 600 $KDUMP_LOG_PATH/kdump.log
|
|
PS4='+ $(date "+%Y-%m-%d %H:%M:%S") ${BASH_SOURCE}@${LINENO}: '
|
|
set -x
|
|
|
|
# shellcheck disable=SC2086
|
|
$KEXEC $KEXEC_ARGS $standard_kexec_args \
|
|
--command-line="$KDUMP_COMMANDLINE" \
|
|
--initrd="$TARGET_INITRD" "$KDUMP_KERNEL"
|
|
|
|
ret=$?
|
|
set +x
|
|
exec 2>&12 12>&-
|
|
|
|
remove_kdump_kernel_key
|
|
|
|
if [[ $ret == 0 ]]; then
|
|
dinfo "kexec: loaded kdump kernel"
|
|
return 0
|
|
else
|
|
derror "kexec: failed to load kdump kernel"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
check_ssh_config()
|
|
{
|
|
local SSH_TARGET
|
|
|
|
while read -r config_opt config_val; do
|
|
case "$config_opt" in
|
|
sshkey)
|
|
# remove inline comments after the end of a directive.
|
|
if [[ -f $config_val ]]; then
|
|
# canonicalize the path
|
|
SSH_KEY_LOCATION=$(/usr/bin/readlink -m "$config_val")
|
|
else
|
|
dwarn "WARNING: '$config_val' doesn't exist, using default value '$SSH_KEY_LOCATION'"
|
|
fi
|
|
;;
|
|
path)
|
|
SAVE_PATH=$config_val
|
|
;;
|
|
ssh)
|
|
DUMP_TARGET=$config_val
|
|
;;
|
|
*) ;;
|
|
|
|
esac
|
|
done <<< "$(kdump_read_conf)"
|
|
|
|
#make sure they've configured kdump.conf for ssh dumps
|
|
SSH_TARGET=$(echo -n "$DUMP_TARGET" | sed -n '/.*@/p')
|
|
if [[ -z $SSH_TARGET ]]; then
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
# ipv6 host address may takes a long time to be ready.
|
|
# Instead of checking against ipv6 address, we just check the network reachable
|
|
# by the return val of 'ssh'
|
|
check_and_wait_network_ready()
|
|
{
|
|
local start_time
|
|
local warn_once=1
|
|
local cur
|
|
local diff
|
|
local retval
|
|
local errmsg
|
|
|
|
start_time=$(date +%s)
|
|
while true; do
|
|
errmsg=$(ssh -i "$SSH_KEY_LOCATION" -o BatchMode=yes "$DUMP_TARGET" mkdir -p "$SAVE_PATH" 2>&1)
|
|
retval=$?
|
|
|
|
# ssh exits with the exit status of the remote command or with 255 if an error occurred
|
|
if [[ $retval -eq 0 ]]; then
|
|
return 0
|
|
elif [[ $retval -ne 255 ]]; then
|
|
derror "Could not create $DUMP_TARGET:$SAVE_PATH, you should check the privilege on server side"
|
|
return 1
|
|
fi
|
|
|
|
# if server removes the authorized_keys or, no /root/.ssh/kdump_id_rsa
|
|
ddebug "$errmsg"
|
|
if echo "$errmsg" | grep -q "Permission denied\|No such file or directory\|Host key verification failed"; then
|
|
derror "Could not create $DUMP_TARGET:$SAVE_PATH, you probably need to run \"kdumpctl propagate\""
|
|
return 1
|
|
fi
|
|
|
|
if [[ $warn_once -eq 1 ]]; then
|
|
dwarn "Network dump target is not usable, waiting for it to be ready..."
|
|
warn_once=0
|
|
fi
|
|
|
|
cur=$(date +%s)
|
|
diff=$((cur - start_time))
|
|
# 60s time out
|
|
if [[ $diff -gt 180 ]]; then
|
|
break
|
|
fi
|
|
sleep 1
|
|
done
|
|
|
|
dinfo "Could not create $DUMP_TARGET:$SAVE_PATH, ipaddr is not ready yet. You should check network connection"
|
|
return 1
|
|
}
|
|
|
|
check_ssh_target()
|
|
{
|
|
check_and_wait_network_ready
|
|
}
|
|
|
|
propagate_ssh_key()
|
|
{
|
|
if ! check_ssh_config; then
|
|
derror "No ssh config specified in $KDUMP_CONFIG_FILE. Can't propagate"
|
|
exit 1
|
|
fi
|
|
|
|
local KEYFILE=$SSH_KEY_LOCATION
|
|
local errmsg="Failed to propagate ssh key"
|
|
|
|
#Check to see if we already created key, if not, create it.
|
|
if [[ -f $KEYFILE ]]; then
|
|
dinfo "Using existing keys..."
|
|
else
|
|
dinfo "Generating new ssh keys... "
|
|
/usr/bin/ssh-keygen -t rsa -f "$KEYFILE" -N "" 2>&1 > /dev/null
|
|
dinfo "done."
|
|
fi
|
|
|
|
#now find the target ssh user and server to contact.
|
|
SSH_USER=$(echo "$DUMP_TARGET" | 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 [[ $RET == 0 ]]; then
|
|
dinfo "$KEYFILE has been added to ~$SSH_USER/.ssh/authorized_keys on $SSH_SERVER"
|
|
return 0
|
|
else
|
|
derror "$errmsg, $KEYFILE failed in transfer to $SSH_SERVER"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
show_reserved_mem()
|
|
{
|
|
local mem
|
|
local mem_mb
|
|
|
|
mem=$(< /sys/kernel/kexec_crash_size)
|
|
mem_mb=$((mem / 1024 / 1024))
|
|
|
|
dinfo "Reserved ${mem_mb}MB memory for crash kernel"
|
|
}
|
|
|
|
check_current_fadump_status()
|
|
{
|
|
# Check if firmware-assisted dump has been registered.
|
|
rc=$(< $FADUMP_REGISTER_SYS_NODE)
|
|
[[ $rc -eq 1 ]] && return 0
|
|
return 1
|
|
}
|
|
|
|
check_current_status()
|
|
{
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
check_current_fadump_status
|
|
else
|
|
check_current_kdump_status
|
|
fi
|
|
|
|
return $?
|
|
}
|
|
|
|
save_raw()
|
|
{
|
|
local kdump_dir
|
|
local raw_target
|
|
|
|
raw_target=$(kdump_get_conf_val raw)
|
|
[[ -z $raw_target ]] && return 0
|
|
[[ -b $raw_target ]] || {
|
|
derror "raw partition $raw_target not found"
|
|
return 1
|
|
}
|
|
check_fs=$(lsblk --nodeps -npo FSTYPE "$raw_target")
|
|
if [[ $(echo "$check_fs" | wc -w) -ne 0 ]]; then
|
|
dwarn "Warning: Detected '$check_fs' signature on $raw_target, data loss is expected."
|
|
return 0
|
|
fi
|
|
kdump_dir=$(kdump_get_conf_val path)
|
|
if [[ -z ${kdump_dir} ]]; then
|
|
coredir="/var/crash/$(date +"%Y-%m-%d-%H:%M")"
|
|
else
|
|
coredir="${kdump_dir}/$(date +"%Y-%m-%d-%H:%M")"
|
|
fi
|
|
|
|
mkdir -p "$coredir"
|
|
[[ -d $coredir ]] || {
|
|
derror "failed to create $coredir"
|
|
return 1
|
|
}
|
|
if makedumpfile -R "$coredir/vmcore" < "$raw_target" > /dev/null 2>&1; then
|
|
# dump found
|
|
dinfo "Dump saved to $coredir/vmcore"
|
|
# wipe makedumpfile header
|
|
dd if=/dev/zero of="$raw_target" bs=1b count=1 2> /dev/null
|
|
else
|
|
rm -rf "$coredir"
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
local_fs_dump_target()
|
|
{
|
|
local _target
|
|
|
|
if _target=$(grep -E "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf); then
|
|
echo "$_target" | awk '{print $2}'
|
|
fi
|
|
}
|
|
|
|
path_to_be_relabeled()
|
|
{
|
|
local _path _target _mnt="/" _rmnt
|
|
|
|
if is_user_configured_dump_target; then
|
|
if is_mount_in_dracut_args; then
|
|
return
|
|
fi
|
|
|
|
_target=$(local_fs_dump_target)
|
|
if [[ -n $_target ]]; then
|
|
_mnt=$(get_mntpoint_from_target "$_target")
|
|
if ! is_mounted "$_mnt"; then
|
|
return
|
|
fi
|
|
else
|
|
return
|
|
fi
|
|
fi
|
|
|
|
_path=$(get_save_path)
|
|
# if $_path is masked by other mount, we will not relabel it.
|
|
_rmnt=$(df "$_mnt/$_path" 2> /dev/null | tail -1 | awk '{ print $NF }')
|
|
if [[ $_rmnt == "$_mnt" ]]; then
|
|
echo "$_mnt/$_path"
|
|
fi
|
|
}
|
|
|
|
selinux_relabel()
|
|
{
|
|
local _path _i _attr
|
|
|
|
_path=$(path_to_be_relabeled)
|
|
if [[ -z $_path ]] || ! [[ -d $_path ]]; then
|
|
return
|
|
fi
|
|
|
|
while IFS= read -r -d '' _i; do
|
|
_attr=$(getfattr -m "security.selinux" "$_i" 2> /dev/null)
|
|
if [[ -z $_attr ]]; then
|
|
restorecon "$_i"
|
|
fi
|
|
done < <(find "$_path" -print0)
|
|
}
|
|
|
|
check_fence_kdump_config()
|
|
{
|
|
local hostname
|
|
local ipaddrs
|
|
local nodes
|
|
|
|
hostname=$(hostname)
|
|
ipaddrs=$(hostname -I)
|
|
nodes=$(kdump_get_conf_val "fence_kdump_nodes")
|
|
|
|
for node in $nodes; do
|
|
if [[ $node == "$hostname" ]]; then
|
|
derror "Option fence_kdump_nodes cannot contain $hostname"
|
|
return 1
|
|
fi
|
|
# node can be ipaddr
|
|
if echo "$ipaddrs " | grep -q "$node "; then
|
|
derror "Option fence_kdump_nodes cannot contain $node"
|
|
return 1
|
|
fi
|
|
done
|
|
|
|
return 0
|
|
}
|
|
|
|
check_dump_feasibility()
|
|
{
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
return 0
|
|
fi
|
|
|
|
check_kdump_feasibility
|
|
return $?
|
|
}
|
|
|
|
start_fadump()
|
|
{
|
|
echo 1 > $FADUMP_REGISTER_SYS_NODE
|
|
if ! check_current_fadump_status; then
|
|
derror "fadump: failed to register"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "fadump: registered successfully"
|
|
return 0
|
|
}
|
|
|
|
start_dump()
|
|
{
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
start_fadump
|
|
else
|
|
load_kdump
|
|
fi
|
|
|
|
return $?
|
|
}
|
|
|
|
check_failure_action_config()
|
|
{
|
|
local default_option
|
|
local failure_action
|
|
local option="failure_action"
|
|
|
|
default_option=$(kdump_get_conf_val default)
|
|
failure_action=$(kdump_get_conf_val failure_action)
|
|
|
|
if [[ -z $failure_action ]] && [[ -z $default_option ]]; then
|
|
return 0
|
|
elif [[ -n $failure_action ]] && [[ -n $default_option ]]; then
|
|
derror "Cannot specify 'failure_action' and 'default' option together"
|
|
return 1
|
|
fi
|
|
|
|
if [[ -n $default_option ]]; then
|
|
option="default"
|
|
failure_action="$default_option"
|
|
fi
|
|
|
|
case "$failure_action" in
|
|
reboot | halt | poweroff | shell | dump_to_rootfs)
|
|
return 0
|
|
;;
|
|
*)
|
|
dinfo $"Usage kdump.conf: $option {reboot|halt|poweroff|shell|dump_to_rootfs}"
|
|
return 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
check_final_action_config()
|
|
{
|
|
local final_action
|
|
|
|
final_action=$(kdump_get_conf_val final_action)
|
|
if [[ -z $final_action ]]; then
|
|
return 0
|
|
else
|
|
case "$final_action" in
|
|
reboot | halt | poweroff)
|
|
return 0
|
|
;;
|
|
*)
|
|
dinfo $"Usage kdump.conf: final_action {reboot|halt|poweroff}"
|
|
return 1
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
start()
|
|
{
|
|
if ! check_dump_feasibility; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
if ! check_config; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
if sestatus 2> /dev/null | grep -q "SELinux status.*enabled"; then
|
|
selinux_relabel
|
|
fi
|
|
|
|
if ! save_raw; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
if [[ $DEFAULT_DUMP_MODE == "kdump" ]] && check_current_kdump_status; then
|
|
dwarn "Kdump already running: [WARNING]"
|
|
return 0
|
|
fi
|
|
|
|
if check_ssh_config; then
|
|
if ! check_ssh_target; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
fi
|
|
|
|
if ! check_rebuild; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
if ! start_dump; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "Starting kdump: [OK]"
|
|
}
|
|
|
|
reload()
|
|
{
|
|
if ! check_current_status; then
|
|
dwarn "Kdump was not running: [WARNING]"
|
|
fi
|
|
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
reload_fadump
|
|
return $?
|
|
else
|
|
if ! stop_kdump; then
|
|
derror "Stopping kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
fi
|
|
|
|
dinfo "Stopping kdump: [OK]"
|
|
|
|
if ! setup_initrd; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
if ! start_dump; then
|
|
derror "Starting kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "Starting kdump: [OK]"
|
|
}
|
|
|
|
stop_fadump()
|
|
{
|
|
echo 0 > $FADUMP_REGISTER_SYS_NODE
|
|
if check_current_fadump_status; then
|
|
derror "fadump: failed to unregister"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "fadump: unregistered successfully"
|
|
return 0
|
|
}
|
|
|
|
stop_kdump()
|
|
{
|
|
if is_secure_boot_enforced; then
|
|
$KEXEC -s -p -u
|
|
else
|
|
$KEXEC -p -u
|
|
fi
|
|
|
|
# shellcheck disable=SC2181
|
|
if [[ $? != 0 ]]; then
|
|
derror "kexec: failed to unload kdump kernel"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "kexec: unloaded kdump kernel"
|
|
return 0
|
|
}
|
|
|
|
reload_fadump()
|
|
{
|
|
if echo 1 > $FADUMP_REGISTER_SYS_NODE; then
|
|
dinfo "fadump: re-registered successfully"
|
|
return 0
|
|
else
|
|
# FADump could fail on older kernel where re-register
|
|
# support is not enabled. Try stop/start from userspace
|
|
# to handle such scenario.
|
|
if stop_fadump; then
|
|
start_fadump
|
|
return $?
|
|
fi
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
|
|
stop()
|
|
{
|
|
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
|
|
stop_fadump
|
|
else
|
|
stop_kdump
|
|
fi
|
|
|
|
# shellcheck disable=SC2181
|
|
if [[ $? != 0 ]]; then
|
|
derror "Stopping kdump: [FAILED]"
|
|
return 1
|
|
fi
|
|
|
|
dinfo "Stopping kdump: [OK]"
|
|
return 0
|
|
}
|
|
|
|
rebuild()
|
|
{
|
|
check_config || return 1
|
|
|
|
if check_ssh_config; then
|
|
if ! check_ssh_target; then
|
|
return 1
|
|
fi
|
|
fi
|
|
|
|
setup_initrd || return 1
|
|
|
|
dinfo "Rebuilding $TARGET_INITRD"
|
|
rebuild_initrd
|
|
return $?
|
|
}
|
|
|
|
do_estimate()
|
|
{
|
|
local kdump_mods
|
|
local -A large_mods
|
|
local baseline
|
|
local kernel_size mod_size initrd_size baseline_size runtime_size reserved_size estimated_size recommended_size _cryptsetup_overhead
|
|
local size_mb=$((1024 * 1024))
|
|
|
|
setup_initrd
|
|
if [[ ! -f $TARGET_INITRD ]]; then
|
|
derror "kdumpctl estimate: kdump initramfs is not built yet."
|
|
exit 1
|
|
fi
|
|
|
|
kdump_mods="$(lsinitrd "$TARGET_INITRD" -f /usr/lib/dracut/hostonly-kernel-modules.txt | tr '\n' ' ')"
|
|
baseline=$(kdump_get_arch_recommend_size)
|
|
if [[ ${baseline: -1} == "M" ]]; then
|
|
baseline=${baseline%M}
|
|
elif [[ ${baseline: -1} == "G" ]]; then
|
|
baseline=$((${baseline%G} * 1024))
|
|
elif [[ ${baseline: -1} == "T" ]]; then
|
|
baseline=$((${baseline%Y} * 1048576))
|
|
fi
|
|
|
|
# The default pre-reserved crashkernel value
|
|
baseline_size=$((baseline * size_mb))
|
|
# Current reserved crashkernel size
|
|
reserved_size=$(< /sys/kernel/kexec_crash_size)
|
|
# A pre-estimated value for userspace usage and kernel
|
|
# runtime allocation, 64M should good for most cases
|
|
runtime_size=$((64 * size_mb))
|
|
# Kernel image size
|
|
kernel_size=$(get_kernel_size "$KDUMP_KERNEL")
|
|
# Kdump initramfs size
|
|
initrd_size=$(du -b "$TARGET_INITRD" | awk '{print $1}')
|
|
# Kernel modules static size after loaded
|
|
mod_size=0
|
|
while read -r _name _size _; do
|
|
if [[ " $kdump_mods " != *" $_name "* ]]; then
|
|
continue
|
|
fi
|
|
mod_size=$((mod_size + _size))
|
|
|
|
# Mark module with static size larger than 2M as large module
|
|
if [[ $((_size / size_mb)) -ge 1 ]]; then
|
|
large_mods[$_name]=$_size
|
|
fi
|
|
done <<< "$(< /proc/modules)"
|
|
|
|
# Extra memory usage required for LUKS2 decryption
|
|
crypt_size=0
|
|
for _dev in $(get_all_kdump_crypt_dev); do
|
|
_crypt_info=$(cryptsetup luksDump "/dev/block/$_dev")
|
|
[[ $(echo "$_crypt_info" | sed -n "s/^Version:\s*\(.*\)/\1/p") == "2" ]] || continue
|
|
for _mem in $(echo "$_crypt_info" | sed -n "s/\sMemory:\s*\(.*\)/\1/p" | sort -n -r); do
|
|
crypt_size=$((crypt_size + _mem * 1024))
|
|
break
|
|
done
|
|
done
|
|
|
|
if [[ $crypt_size -ne 0 ]]; then
|
|
if [[ $(uname -m) == aarch64 ]]; then
|
|
_cryptsetup_overhead=50
|
|
else
|
|
_cryptsetup_overhead=20
|
|
fi
|
|
|
|
crypt_size=$((crypt_size + _cryptsetup_overhead * size_mb))
|
|
echo -e "Encrypted kdump target requires extra memory, assuming using the keyslot with maximum memory requirement\n"
|
|
fi
|
|
|
|
estimated_size=$((kernel_size + mod_size + initrd_size + runtime_size + crypt_size))
|
|
if [[ $baseline_size -gt $estimated_size ]]; then
|
|
recommended_size=$baseline_size
|
|
else
|
|
recommended_size=$estimated_size
|
|
fi
|
|
|
|
echo "Reserved crashkernel: $((reserved_size / size_mb))M"
|
|
echo "Recommended crashkernel: $((recommended_size / size_mb))M"
|
|
echo
|
|
echo "Kernel image size: $((kernel_size / size_mb))M"
|
|
echo "Kernel modules size: $((mod_size / size_mb))M"
|
|
echo "Initramfs size: $((initrd_size / size_mb))M"
|
|
echo "Runtime reservation: $((runtime_size / size_mb))M"
|
|
[[ $crypt_size -ne 0 ]] &&
|
|
echo "LUKS required size: $((crypt_size / size_mb))M"
|
|
echo -n "Large modules:"
|
|
if [[ ${#large_mods[@]} -eq 0 ]]; then
|
|
echo " <none>"
|
|
else
|
|
echo ""
|
|
for _mod in "${!large_mods[@]}"; do
|
|
echo " $_mod: ${large_mods[$_mod]}"
|
|
done
|
|
fi
|
|
|
|
if [[ $reserved_size -lt $recommended_size ]]; then
|
|
echo "WARNING: Current crashkernel size is lower than recommended size $((recommended_size / size_mb))M."
|
|
fi
|
|
}
|
|
|
|
get_default_crashkernel()
|
|
{
|
|
local _dump_mode=$1
|
|
|
|
kdump_get_arch_recommend_crashkernel "$_dump_mode"
|
|
}
|
|
|
|
# Read kernel cmdline parameter for a specific kernel
|
|
# $1: kernel path, DEFAULT or kernel path, ALL not accepted
|
|
# $2: kernel cmldine parameter
|
|
get_grub_kernel_boot_parameter()
|
|
{
|
|
local _kernel_path=$1 _para=$2
|
|
|
|
[[ $_kernel_path == ALL ]] && derror "kernel_path=ALL invalid for get_grub_kernel_boot_parameter" && return 1
|
|
grubby --info="$_kernel_path" | sed -En -e "/^args=.*$/{s/^.*(\s|\")${_para}=(\S*).*\"$/\2/p;q}"
|
|
}
|
|
|
|
# get dump mode by fadump value
|
|
# return
|
|
# - fadump, if fadump=on or fadump=nocma
|
|
# - kdump, if fadump=off or empty fadump, return kdump
|
|
# - error if otherwise
|
|
get_dump_mode_by_fadump_val()
|
|
{
|
|
local _fadump_val=$1
|
|
|
|
if [[ -z $_fadump_val ]] || [[ $_fadump_val == off ]]; then
|
|
echo -n kdump
|
|
elif [[ $_fadump_val == on ]] || [[ $_fadump_val == nocma ]]; then
|
|
echo -n fadump
|
|
else
|
|
derror "invalid fadump=$_fadump_val"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
# get dump mode of a specific kernel
|
|
# based on its fadump kernel cmdline parameter
|
|
get_dump_mode_by_kernel()
|
|
{
|
|
local _kernel_path=$1 _fadump_val _dump_mode
|
|
|
|
_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel_path" fadump)
|
|
if _dump_mode=$(get_dump_mode_by_fadump_val "$_fadump_val"); then
|
|
echo -n "$_dump_mode"
|
|
else
|
|
derror "failed to get dump mode for kernel $_kernel_path"
|
|
exit
|
|
fi
|
|
}
|
|
|
|
_filter_grubby_kernel_str()
|
|
{
|
|
local _grubby_kernel_str=$1
|
|
echo -n "$_grubby_kernel_str" | sed -n -e 's/^kernel="\(.*\)"/\1/p'
|
|
}
|
|
|
|
_find_kernel_path_by_release()
|
|
{
|
|
local _release="$1" _grubby_kernel_str _kernel_path
|
|
_grubby_kernel_str=$(grubby --info ALL | grep "^kernel=.*$_release\"$")
|
|
_kernel_path=$(_filter_grubby_kernel_str "$_grubby_kernel_str")
|
|
if [[ -z $_kernel_path ]]; then
|
|
derror "kernel $_release doesn't exist"
|
|
return 1
|
|
fi
|
|
echo -n "$_kernel_path"
|
|
}
|
|
|
|
_get_current_running_kernel_path()
|
|
{
|
|
local _release _path
|
|
|
|
_release=$(uname -r)
|
|
if _path=$(_find_kernel_path_by_release "$_release"); then
|
|
echo -n "$_path"
|
|
else
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
_update_kernel_cmdline()
|
|
{
|
|
local _kernel_path=$1 _crashkernel=$2 _dump_mode=$3 _fadump_val=$4
|
|
|
|
if is_atomic; then
|
|
if rpm-ostree kargs | grep -q "crashkernel="; then
|
|
rpm-ostree kargs --replace="crashkernel=$_crashkernel"
|
|
else
|
|
rpm-ostree kargs --append="crashkernel=$_crashkernel"
|
|
fi
|
|
else
|
|
grubby --args "crashkernel=$_crashkernel" --update-kernel "$_kernel_path"
|
|
if [[ $_dump_mode == kdump ]]; then
|
|
grubby --remove-args="fadump" --update-kernel "$_kernel_path"
|
|
else
|
|
grubby --args="fadump=$_fadump_val" --update-kernel "$_kernel_path"
|
|
fi
|
|
fi
|
|
[[ -f /etc/zipl.conf ]] && zipl > /dev/null
|
|
}
|
|
|
|
_valid_grubby_kernel_path()
|
|
{
|
|
[[ -n "$1" ]] && grubby --info="$1" > /dev/null 2>&1
|
|
}
|
|
|
|
# return all the kernel paths given a grubby kernel-path
|
|
#
|
|
# $1: kernel path accepted by grubby, e.g. DEFAULT, ALL,
|
|
# /boot/vmlinuz-`uname -r`
|
|
# return: kernel paths separated by space
|
|
_get_all_kernels_from_grubby()
|
|
{
|
|
local _kernels _line _kernel_path _grubby_kernel_path=$1
|
|
|
|
for _line in $(grubby --info "$_grubby_kernel_path" | grep "^kernel="); do
|
|
_kernel_path=$(_filter_grubby_kernel_str "$_line")
|
|
_kernels="$_kernels $_kernel_path"
|
|
done
|
|
echo -n "$_kernels"
|
|
}
|
|
|
|
GRUB_ETC_DEFAULT="/etc/default/grub"
|
|
# Update a kernel parameter in default grub conf
|
|
#
|
|
# If a value is specified, it will be inserted in the end. Otherwise it
|
|
# would remove given kernel parameter.
|
|
#
|
|
# Note this function doesn't address the following cases,
|
|
# 1. The kernel ignores everything on the command line after a '--'. So
|
|
# simply adding the new entry to the end will fail if the cmdline
|
|
# contains a --.
|
|
# 2. If the value for a parameter contains spaces it can be quoted using
|
|
# double quotes, for example param="value with spaces". This will
|
|
# break the [^[:space:]\"] regex for the value.
|
|
# 3. Dashes and underscores in the parameter name are equivalent. So
|
|
# some_parameter and some-parameter are identical.
|
|
# 4. Some parameters, e.g. efivar_ssdt, can be given multiple times.
|
|
# 5. Some kernel parameters, e.g. quiet, doesn't have value
|
|
#
|
|
# $1: the name of the kernel command line parameter
|
|
# $2: new value. If empty, given parameter would be removed
|
|
_update_kernel_arg_in_grub_etc_default()
|
|
{
|
|
local _para=$1 _val=$2 _para_val
|
|
|
|
if [[ $(uname -m) == s390x ]]; then
|
|
return
|
|
fi
|
|
|
|
if [[ -n $_val ]]; then
|
|
_para_val="$_para=$_val"
|
|
fi
|
|
|
|
# Update the command line /etc/default/grub, i.e.
|
|
# on the line that starts with 'GRUB_CMDLINE_LINUX=',
|
|
# 1) remove $para=$val if the it's the first arg
|
|
# 2) remove all occurences of $para=$val
|
|
# 3) insert $_para_val to end
|
|
# 4) remove duplicate spaces left over by 1) or 2) or 3)
|
|
# 5) remove space at the beginning of the string left over by 1) or 2) or 3)
|
|
# 6) remove space at the end of the string left over by 1) or 2) or 3)
|
|
sed -i -E "/^GRUB_CMDLINE_LINUX=/ {
|
|
s/\"${_para}=[^[:space:]\"]*/\"/g;
|
|
s/[[:space:]]+${_para}=[^[:space:]\"]*/ /g;
|
|
s/\"$/ ${_para_val}\"/
|
|
s/[[:space:]]+/ /g;
|
|
s/(\")[[:space:]]+/\1/g;
|
|
s/[[:space:]]+(\")/\1/g;
|
|
}" "$GRUB_ETC_DEFAULT"
|
|
}
|
|
|
|
# Read the kernel arg in default grub conf.
|
|
|
|
# Note reading a kernel parameter that doesn't have a value isn't supported.
|
|
#
|
|
# $1: the name of the kernel command line parameter
|
|
_read_kernel_arg_in_grub_etc_default()
|
|
{
|
|
sed -n -E "s/^GRUB_CMDLINE_LINUX=.*[[:space:]\"]${1}=([^[:space:]\"]*).*$/\1/p" "$GRUB_ETC_DEFAULT"
|
|
}
|
|
|
|
reset_crashkernel()
|
|
{
|
|
local _opt _val _dump_mode _fadump_val _reboot _grubby_kernel_path _kernel _kernels
|
|
local _old_crashkernel _new_crashkernel _new_dump_mode _crashkernel_changed
|
|
local _new_fadump_val _old_fadump_val _what_is_updated
|
|
|
|
for _opt in "$@"; do
|
|
case "$_opt" in
|
|
--fadump=*)
|
|
_val=${_opt#*=}
|
|
if _dump_mode=$(get_dump_mode_by_fadump_val $_val); then
|
|
_fadump_val=$_val
|
|
else
|
|
derror "failed to determine dump mode"
|
|
exit
|
|
fi
|
|
;;
|
|
--kernel=*)
|
|
_val=${_opt#*=}
|
|
if ! _valid_grubby_kernel_path $_val; then
|
|
derror "Invalid $_opt, please specify a valid kernel path, ALL or DEFAULT"
|
|
exit
|
|
fi
|
|
_grubby_kernel_path=$_val
|
|
;;
|
|
--reboot)
|
|
_reboot=yes
|
|
;;
|
|
*)
|
|
derror "$_opt not recognized"
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
# 1. CoreOS uses "rpm-ostree kargs" instead of grubby to manage kernel command
|
|
# line. --kernel=ALL doesn't make sense for CoreOS.
|
|
# 2. CoreOS doesn't support POWER so the dump mode is always kdump.
|
|
# 3. "rpm-ostree kargs" would prompt the user to reboot the system after
|
|
# modifying the kernel command line so there is no need for kexec-tools
|
|
# to repeat it.
|
|
if is_atomic; then
|
|
_old_crashkernel=$(rpm-ostree kargs | sed -n -E 's/.*(^|\s)crashkernel=(\S*).*/\2/p')
|
|
_new_dump_mode=kdump
|
|
_new_crashkernel=$(kdump_get_arch_recommend_crashkernel "$_new_dump_mode")
|
|
if [[ $_old_crashkernel != "$_new_crashkernel" ]]; then
|
|
_update_kernel_cmdline "" "$_new_crashkernel" "$_new_dump_mode" ""
|
|
if [[ $_reboot == yes ]]; then
|
|
systemctl reboot
|
|
fi
|
|
fi
|
|
return
|
|
fi
|
|
|
|
# For non-ppc64le systems, the dump mode is always kdump since only ppc64le
|
|
# has FADump.
|
|
if [[ -z $_dump_mode && $(uname -m) != ppc64le ]]; then
|
|
_dump_mode=kdump
|
|
_fadump_val=off
|
|
fi
|
|
|
|
# If the dump mode is determined, we can also know the default crashkernel value
|
|
if [[ -n $_dump_mode ]]; then
|
|
_crashkernel=$(kdump_get_arch_recommend_crashkernel "$_dump_mode")
|
|
fi
|
|
|
|
# If --kernel-path=ALL, update GRUB_CMDLINE_LINUX in /etc/default/grub.
|
|
#
|
|
# An exception case is when the ppc64le user doesn't specify the fadump value.
|
|
# In this case, the dump mode would be determined by parsing the kernel
|
|
# command line of the kernel(s) to be updated thus don't update GRUB_CMDLINE_LINUX.
|
|
#
|
|
# The following code has been simplified because of what has been done early,
|
|
# - set the dump mode as kdump for non-ppc64le cases
|
|
# - retrieved the default crashkernel value for given dump mode
|
|
if [[ $_grubby_kernel_path == ALL && -n $_dump_mode ]]; then
|
|
_update_kernel_arg_in_grub_etc_default crashkernel "$_crashkernel"
|
|
# remove the fadump if fadump is disabled
|
|
if [[ $_fadump_val == off ]]; then
|
|
_fadump_val=""
|
|
fi
|
|
_update_kernel_arg_in_grub_etc_default fadump "$_fadump_val"
|
|
fi
|
|
|
|
# If kernel-path not specified, either
|
|
# - use KDUMP_KERNELVER if it's defined
|
|
# - use current running kernel
|
|
if [[ -z $_grubby_kernel_path ]]; then
|
|
if [[ -z $KDUMP_KERNELVER ]] ||
|
|
! _kernel_path=$(_find_kernel_path_by_release "$KDUMP_KERNELVER"); then
|
|
if ! _kernel_path=$(_get_current_running_kernel_path); then
|
|
derror "no running kernel found"
|
|
exit 1
|
|
fi
|
|
fi
|
|
_kernels=$_kernel_path
|
|
else
|
|
_kernels=$(_get_all_kernels_from_grubby "$_grubby_kernel_path")
|
|
fi
|
|
|
|
for _kernel in $_kernels; do
|
|
if [[ -z $_dump_mode ]]; then
|
|
_new_dump_mode=$(get_dump_mode_by_kernel "$_kernel")
|
|
_new_crashkernel=$(kdump_get_arch_recommend_crashkernel "$_new_dump_mode")
|
|
_new_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
|
|
else
|
|
_new_dump_mode=$_dump_mode
|
|
_new_crashkernel=$_crashkernel
|
|
_new_fadump_val=$_fadump_val
|
|
fi
|
|
|
|
_old_crashkernel=$(get_grub_kernel_boot_parameter "$_kernel" crashkernel)
|
|
_old_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
|
|
if [[ $_old_crashkernel != "$_new_crashkernel" || $_old_fadump_val != "$_new_fadump_val" ]]; then
|
|
_update_kernel_cmdline "$_kernel" "$_new_crashkernel" "$_new_dump_mode" "$_new_fadump_val"
|
|
if [[ $_reboot != yes ]]; then
|
|
if [[ $_old_crashkernel != "$_new_crashkernel" ]]; then
|
|
_what_is_updated="Updated crashkernel=$_new_crashkernel"
|
|
else
|
|
# This case happens only when switching between fadump=on and fadump=nocma
|
|
_what_is_updated="Updated fadump=$_new_fadump_val"
|
|
fi
|
|
dwarn "$_what_is_updated for kernel=$_kernel. Please reboot the system for the change to take effect."
|
|
fi
|
|
_crashkernel_changed=yes
|
|
fi
|
|
done
|
|
|
|
if [[ $_reboot == yes && $_crashkernel_changed == yes ]]; then
|
|
reboot
|
|
fi
|
|
}
|
|
|
|
_is_bootloader_installed()
|
|
{
|
|
if [[ $(uname -m) == s390x ]]; then
|
|
test -f /etc/zipl.conf
|
|
else
|
|
test -f /boot/grub2/grub.cfg
|
|
fi
|
|
}
|
|
|
|
# update the crashkernel value in GRUB_ETC_DEFAULT if necessary
|
|
#
|
|
# called by reset_crashkernel_after_update and inherit its array variable
|
|
# _crashkernel_vals
|
|
update_crashkernel_in_grub_etc_default_after_update()
|
|
{
|
|
local _crashkernel _fadump_val
|
|
local _dump_mode _old_default_crashkernel _new_default_crashkernel
|
|
|
|
if [[ $(uname -m) == s390x ]]; then
|
|
return
|
|
fi
|
|
|
|
_crashkernel=$(_read_kernel_arg_in_grub_etc_default crashkernel)
|
|
|
|
if [[ -z $_crashkernel ]]; then
|
|
return
|
|
fi
|
|
|
|
_fadump_val=$(_read_kernel_arg_in_grub_etc_default fadump)
|
|
_dump_mode=$(get_dump_mode_by_fadump_val "$_fadump_val")
|
|
|
|
_old_default_crashkernel=${_crashkernel_vals[old_${_dump_mode}]}
|
|
_new_default_crashkernel=${_crashkernel_vals[new_${_dump_mode}]}
|
|
|
|
if [[ $_crashkernel == auto ]] ||
|
|
[[ $_crashkernel == "$_old_default_crashkernel" &&
|
|
$_new_default_crashkernel != "$_old_default_crashkernel" ]]; then
|
|
_update_kernel_arg_in_grub_etc_default crashkernel "$_new_default_crashkernel"
|
|
fi
|
|
}
|
|
|
|
# shellcheck disable=SC2154 # false positive when dereferencing an array
|
|
reset_crashkernel_after_update()
|
|
{
|
|
local _kernel _crashkernel _dump_mode _fadump_val _old_default_crashkernel _new_default_crashkernel
|
|
declare -A _crashkernel_vals
|
|
|
|
if ! _is_bootloader_installed; then
|
|
return
|
|
fi
|
|
|
|
_crashkernel_vals[old_kdump]=$(cat /tmp/old_default_crashkernel 2> /dev/null)
|
|
_crashkernel_vals[old_fadump]=$(cat /tmp/old_default_crashkernel_fadump 2> /dev/null)
|
|
_crashkernel_vals[new_kdump]=$(get_default_crashkernel kdump)
|
|
_crashkernel_vals[new_fadump]=$(get_default_crashkernel fadump)
|
|
|
|
for _kernel in $(_get_all_kernels_from_grubby ALL); do
|
|
_crashkernel=$(get_grub_kernel_boot_parameter "$_kernel" crashkernel)
|
|
if [[ $_crashkernel == auto ]]; then
|
|
reset_crashkernel "--kernel=$_kernel"
|
|
elif [[ -n $_crashkernel ]]; then
|
|
_dump_mode=$(get_dump_mode_by_kernel "$_kernel")
|
|
_old_default_crashkernel=${_crashkernel_vals[old_${_dump_mode}]}
|
|
_new_default_crashkernel=${_crashkernel_vals[new_${_dump_mode}]}
|
|
if [[ $_crashkernel == "$_old_default_crashkernel" ]] &&
|
|
[[ $_new_default_crashkernel != "$_old_default_crashkernel" ]]; then
|
|
_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
|
|
if _update_kernel_cmdline "$_kernel" "$_new_default_crashkernel" "$_dump_mode" "$_fadump_val"; then
|
|
echo "For kernel=$_kernel, crashkernel=$_new_default_crashkernel now."
|
|
fi
|
|
fi
|
|
fi
|
|
done
|
|
|
|
update_crashkernel_in_grub_etc_default_after_update
|
|
}
|
|
|
|
# read the value of an environ variable from given environ file path
|
|
#
|
|
# The environment variable entries in /proc/[pid]/environ are separated
|
|
# by null bytes instead of by spaces.
|
|
#
|
|
# $1: environment variable
|
|
# $2: environ file path
|
|
read_proc_environ_var()
|
|
{
|
|
local _var=$1 _environ_path=$2
|
|
sed -n -E "s/.*(^|\x00)${_var}=([^\x00]*).*/\2/p" < "$_environ_path"
|
|
}
|
|
|
|
_OSBUILD_ENVIRON_PATH='/proc/1/environ'
|
|
_is_osbuild()
|
|
{
|
|
[[ $(read_proc_environ_var container "$_OSBUILD_ENVIRON_PATH") == bwrap-osbuild ]]
|
|
}
|
|
|
|
reset_crashkernel_for_installed_kernel()
|
|
{
|
|
local _installed_kernel _running_kernel _crashkernel _crashkernel_running
|
|
local _dump_mode_running _fadump_val_running
|
|
|
|
# During package install, only try to reset crashkernel for osbuild
|
|
# thus to avoid calling grubby when installing os via anaconda
|
|
if ! _is_bootloader_installed && ! _is_osbuild; then
|
|
return
|
|
fi
|
|
|
|
if ! _installed_kernel=$(_find_kernel_path_by_release "$1"); then
|
|
exit 1
|
|
fi
|
|
|
|
if _is_osbuild; then
|
|
if ! grep -qs crashkernel= /etc/kernel/cmdline; then
|
|
reset_crashkernel "--kernel=$_installed_kernel"
|
|
fi
|
|
return
|
|
fi
|
|
|
|
if ! _running_kernel=$(_get_current_running_kernel_path); then
|
|
derror "Couldn't find current running kernel"
|
|
exit
|
|
fi
|
|
|
|
_crashkernel=$(get_grub_kernel_boot_parameter "$_installed_kernel" crashkernel)
|
|
_crashkernel_running=$(get_grub_kernel_boot_parameter "$_running_kernel" crashkernel)
|
|
_dump_mode_running=$(get_dump_mode_by_kernel "$_running_kernel")
|
|
_fadump_val_running=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
|
|
|
|
if [[ $_crashkernel != "$_crashkernel_running" ]]; then
|
|
if _update_kernel_cmdline "$_installed_kernel" "$_crashkernel_running" "$_dump_mode_running" "$_fadump_val_running"; then
|
|
echo "kexec-tools has reset $_installed_kernel to use the new default crashkernel value $_crashkernel_running"
|
|
fi
|
|
elif [[ $_crashkernel == auto ]]; then
|
|
reset_crashkernel "--kernel=$_installed_kernel"
|
|
fi
|
|
}
|
|
|
|
if [[ ! -f $KDUMP_CONFIG_FILE ]]; then
|
|
derror "Error: No kdump config file found!"
|
|
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)
|
|
dinfo "Kdump is operational"
|
|
EXIT_CODE=0
|
|
;;
|
|
1)
|
|
dinfo "Kdump is not operational"
|
|
EXIT_CODE=3
|
|
;;
|
|
esac
|
|
exit $EXIT_CODE
|
|
;;
|
|
reload)
|
|
reload
|
|
;;
|
|
restart)
|
|
stop
|
|
start
|
|
;;
|
|
rebuild)
|
|
rebuild
|
|
;;
|
|
condrestart) ;;
|
|
|
|
propagate)
|
|
propagate_ssh_key
|
|
;;
|
|
showmem)
|
|
show_reserved_mem
|
|
;;
|
|
estimate)
|
|
do_estimate
|
|
;;
|
|
get-default-crashkernel)
|
|
get_default_crashkernel "$2"
|
|
;;
|
|
reset-crashkernel)
|
|
shift
|
|
reset_crashkernel "$@"
|
|
;;
|
|
_reset-crashkernel-after-update)
|
|
if [[ $(kdump_get_conf_val auto_reset_crashkernel) != no ]]; then
|
|
reset_crashkernel_after_update
|
|
fi
|
|
;;
|
|
_reset-crashkernel-for-installed_kernel)
|
|
if [[ $(kdump_get_conf_val auto_reset_crashkernel) != no ]]; then
|
|
reset_crashkernel_for_installed_kernel "$2"
|
|
fi
|
|
;;
|
|
*)
|
|
dinfo $"Usage: $0 {estimate|start|stop|status|restart|reload|rebuild|reset-crashkernel|propagate|showmem}"
|
|
exit 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
# Other kdumpctl instances will block in queue, until this one exits
|
|
single_instance_lock
|
|
|
|
# To avoid fd 9 leaking, we invoke a subshell, close fd 9 and call main.
|
|
# So that fd isn't leaking when main is invoking a subshell.
|
|
(
|
|
exec 9<&-
|
|
main "$@"
|
|
)
|
|
|
|
exit $?
|