You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
989 lines
25 KiB
989 lines
25 KiB
#!/bin/bash |
|
# |
|
# Kdump common variables and functions |
|
# |
|
|
|
. /usr/lib/kdump/kdump-lib-initramfs.sh |
|
|
|
FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled" |
|
|
|
is_fadump_capable() |
|
{ |
|
# Check if firmware-assisted dump is enabled |
|
# if no, fallback to kdump check |
|
if [[ -f $FADUMP_ENABLED_SYS_NODE ]]; then |
|
rc=$(< $FADUMP_ENABLED_SYS_NODE) |
|
[[ $rc -eq 1 ]] && return 0 |
|
fi |
|
return 1 |
|
} |
|
|
|
is_squash_available() |
|
{ |
|
for kmodule in squashfs overlay loop; do |
|
if [[ -z $KDUMP_KERNELVER ]]; then |
|
modprobe --dry-run $kmodule &> /dev/null || return 1 |
|
else |
|
modprobe -S "$KDUMP_KERNELVER" --dry-run $kmodule &> /dev/null || return 1 |
|
fi |
|
done |
|
} |
|
|
|
is_zstd_command_available() |
|
{ |
|
[[ -x "$(command -v zstd)" ]] |
|
} |
|
|
|
perror_exit() |
|
{ |
|
derror "$@" |
|
exit 1 |
|
} |
|
|
|
# Check if fence kdump is configured in Pacemaker cluster |
|
is_pcs_fence_kdump() |
|
{ |
|
# no pcs or fence_kdump_send executables installed? |
|
type -P pcs > /dev/null || return 1 |
|
[[ -x $FENCE_KDUMP_SEND ]] || return 1 |
|
|
|
# fence kdump not configured? |
|
(pcs cluster cib | grep 'type="fence_kdump"') &> /dev/null || return 1 |
|
} |
|
|
|
# Check if fence_kdump is configured using kdump options |
|
is_generic_fence_kdump() |
|
{ |
|
[[ -x $FENCE_KDUMP_SEND ]] || return 1 |
|
|
|
[[ $(kdump_get_conf_val fence_kdump_nodes) ]] |
|
} |
|
|
|
to_dev_name() |
|
{ |
|
local dev="${1//\"/}" |
|
|
|
case "$dev" in |
|
UUID=*) |
|
blkid -U "${dev#UUID=}" |
|
;; |
|
LABEL=*) |
|
blkid -L "${dev#LABEL=}" |
|
;; |
|
*) |
|
echo "$dev" |
|
;; |
|
esac |
|
} |
|
|
|
is_user_configured_dump_target() |
|
{ |
|
[[ $(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw\|nfs\|ssh") ]] || is_mount_in_dracut_args |
|
} |
|
|
|
get_user_configured_dump_disk() |
|
{ |
|
local _target |
|
|
|
_target=$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw") |
|
[[ -n $_target ]] && echo "$_target" && return |
|
|
|
_target=$(get_dracut_args_target "$(kdump_get_conf_val "dracut_args")") |
|
[[ -b $_target ]] && echo "$_target" |
|
} |
|
|
|
get_block_dump_target() |
|
{ |
|
local _target _path |
|
|
|
if is_ssh_dump_target || is_nfs_dump_target; then |
|
return |
|
fi |
|
|
|
_target=$(get_user_configured_dump_disk) |
|
[[ -n $_target ]] && to_dev_name "$_target" && return |
|
|
|
# Get block device name from local save path |
|
_path=$(get_save_path) |
|
_target=$(get_target_from_path "$_path") |
|
[[ -b $_target ]] && to_dev_name "$_target" |
|
} |
|
|
|
is_dump_to_rootfs() |
|
{ |
|
[[ $(kdump_get_conf_val 'failure_action\|default') == dump_to_rootfs ]] |
|
} |
|
|
|
get_failure_action_target() |
|
{ |
|
local _target |
|
|
|
if is_dump_to_rootfs; then |
|
# Get rootfs device name |
|
_target=$(get_root_fs_device) |
|
[[ -b $_target ]] && to_dev_name "$_target" && return |
|
# Then, must be nfs root |
|
echo "nfs" |
|
fi |
|
} |
|
|
|
# Get kdump targets(including root in case of dump_to_rootfs). |
|
get_kdump_targets() |
|
{ |
|
local _target _root |
|
local kdump_targets |
|
|
|
_target=$(get_block_dump_target) |
|
if [[ -n $_target ]]; then |
|
kdump_targets=$_target |
|
elif is_ssh_dump_target; then |
|
kdump_targets="ssh" |
|
else |
|
kdump_targets="nfs" |
|
fi |
|
|
|
# Add the root device if dump_to_rootfs is specified. |
|
_root=$(get_failure_action_target) |
|
if [[ -n $_root ]] && [[ $kdump_targets != "$_root" ]]; then |
|
kdump_targets="$kdump_targets $_root" |
|
fi |
|
|
|
echo "$kdump_targets" |
|
} |
|
|
|
# Return the bind mount source path, return the path itself if it's not bind mounted |
|
# Eg. if /path/to/src is bind mounted to /mnt/bind, then: |
|
# /mnt/bind -> /path/to/src, /mnt/bind/dump -> /path/to/src/dump |
|
# |
|
# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir] |
|
# in the SOURCE column for bind-mounts, then if $_src equals to |
|
# $_src_nofsroot, the mountpoint is not bind mounted directory. |
|
# |
|
# Below is just an example for mount info |
|
# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the |
|
# directory is bind mounted. The former part represents the device path, rest |
|
# part is the bind mounted directory which quotes by bracket "[]". |
|
get_bind_mount_source() |
|
{ |
|
local _mnt _path _src _opt _fstype |
|
local _fsroot _src_nofsroot |
|
|
|
_mnt=$(df "$1" | tail -1 | awk '{print $NF}') |
|
_path=${1#$_mnt} |
|
|
|
_src=$(get_mount_info SOURCE target "$_mnt" -f) |
|
_opt=$(get_mount_info OPTIONS target "$_mnt" -f) |
|
_fstype=$(get_mount_info FSTYPE target "$_mnt" -f) |
|
|
|
# bind mount in fstab |
|
if [[ -d $_src ]] && [[ $_fstype == none ]] && (echo "$_opt" | grep -q "\bbind\b"); then |
|
echo "$_src$_path" && return |
|
fi |
|
|
|
# direct mount |
|
_src_nofsroot=$(get_mount_info SOURCE target "$_mnt" -v -f) |
|
if [[ $_src_nofsroot == "$_src" ]]; then |
|
echo "$_mnt$_path" && return |
|
fi |
|
|
|
_fsroot=${_src#${_src_nofsroot}[} |
|
_fsroot=${_fsroot%]} |
|
_mnt=$(get_mount_info TARGET source "$_src_nofsroot" -f) |
|
|
|
# for btrfs, _fsroot will also contain the subvol value as well, strip it |
|
if [[ $_fstype == btrfs ]]; then |
|
local _subvol |
|
_subvol=${_opt#*subvol=} |
|
_subvol=${_subvol%,*} |
|
_fsroot=${_fsroot#$_subvol} |
|
fi |
|
echo "$_mnt$_fsroot$_path" |
|
} |
|
|
|
get_mntopt_from_target() |
|
{ |
|
get_mount_info OPTIONS source "$1" -f |
|
} |
|
|
|
# Get the path where the target will be mounted in kdump kernel |
|
# $1: kdump target device |
|
get_kdump_mntpoint_from_target() |
|
{ |
|
local _mntpoint |
|
|
|
_mntpoint=$(get_mntpoint_from_target "$1") |
|
# mount under /sysroot if dump to root disk or mount under |
|
# mount under /kdumproot if dump target is not mounted in first kernel |
|
# mount under /kdumproot/$_mntpoint in other cases in 2nd kernel. |
|
# systemd will be in charge to umount it. |
|
if [[ -z $_mntpoint ]]; then |
|
_mntpoint="/kdumproot" |
|
else |
|
if [[ $_mntpoint == "/" ]]; then |
|
_mntpoint="/sysroot" |
|
else |
|
_mntpoint="/kdumproot/$_mntpoint" |
|
fi |
|
fi |
|
|
|
# strip duplicated "/" |
|
echo $_mntpoint | tr -s "/" |
|
} |
|
|
|
kdump_get_persistent_dev() |
|
{ |
|
local dev="${1//\"/}" |
|
|
|
case "$dev" in |
|
UUID=*) |
|
dev=$(blkid -U "${dev#UUID=}") |
|
;; |
|
LABEL=*) |
|
dev=$(blkid -L "${dev#LABEL=}") |
|
;; |
|
esac |
|
echo $(get_persistent_dev "$dev") |
|
} |
|
|
|
is_atomic() |
|
{ |
|
grep -q "ostree" /proc/cmdline |
|
} |
|
|
|
# get ip address or hostname from nfs/ssh config value |
|
get_remote_host() |
|
{ |
|
local _config_val=$1 |
|
|
|
# ipv6 address in kdump.conf is around with "[]", |
|
# factor out the ipv6 address |
|
_config_val=${_config_val#*@} |
|
_config_val=${_config_val%:/*} |
|
_config_val=${_config_val#[} |
|
_config_val=${_config_val%]} |
|
echo "$_config_val" |
|
} |
|
|
|
is_hostname() |
|
{ |
|
local _hostname |
|
|
|
_hostname=$(echo "$1" | grep ":") |
|
if [[ -n $_hostname ]]; then |
|
return 1 |
|
fi |
|
echo "$1" | grep -q "[a-zA-Z]" |
|
} |
|
|
|
# Copied from "/etc/sysconfig/network-scripts/network-functions" |
|
get_hwaddr() |
|
{ |
|
if [[ -f "/sys/class/net/$1/address" ]]; then |
|
awk '{ print toupper($0) }' < "/sys/class/net/$1/address" |
|
elif [[ -d "/sys/class/net/$1" ]]; then |
|
LC_ALL="" LANG="" ip -o link show "$1" 2> /dev/null | |
|
awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/, |
|
"\\1", 1)); }' |
|
fi |
|
} |
|
|
|
# Get value by a field using "nmcli -g" |
|
# Usage: get_nmcli_value_by_field <field> <nmcli command> |
|
# |
|
# "nmcli --get-values" allows us to retrive value(s) by field, for example, |
|
# nmcli --get-values <field> connection show /org/freedesktop/NetworkManager/ActiveConnection/1 |
|
# returns the following value for the corresponding field respectively, |
|
# Field Value |
|
# IP4.DNS "10.19.42.41 | 10.11.5.19 | 10.5.30.160" |
|
# 802-3-ethernet.s390-subchannels "" |
|
# bond.options "mode=balance-rr" |
|
get_nmcli_value_by_field() |
|
{ |
|
LANG=C nmcli --get-values "$@" |
|
} |
|
|
|
# Get nmcli field value of an connection apath (a D-Bus active connection path) |
|
# Usage: get_nmcli_field_by_apath <field> <apath> |
|
get_nmcli_field_by_conpath() |
|
{ |
|
local _field=$1 _apath=$2 |
|
|
|
get_nmcli_value_by_field "$_field" connection show "$_apath" |
|
} |
|
|
|
# Get nmcli connection apath (a D-Bus active connection path ) by ifname |
|
# |
|
# apath is used for nmcli connection operations, e.g. |
|
# $ nmcli connection show $apath |
|
get_nmcli_connection_apath_by_ifname() |
|
{ |
|
local _ifname=$1 |
|
|
|
get_nmcli_value_by_field "GENERAL.CON-PATH" device show "$_ifname" |
|
} |
|
|
|
get_ifcfg_by_device() |
|
{ |
|
grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \ |
|
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1 |
|
} |
|
|
|
get_ifcfg_by_hwaddr() |
|
{ |
|
grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \ |
|
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1 |
|
} |
|
|
|
get_ifcfg_by_uuid() |
|
{ |
|
grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \ |
|
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1 |
|
} |
|
|
|
get_ifcfg_by_name() |
|
{ |
|
grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \ |
|
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1 |
|
} |
|
|
|
is_nm_running() |
|
{ |
|
[[ "$(LANG=C nmcli -t --fields running general status 2> /dev/null)" == "running" ]] |
|
} |
|
|
|
is_nm_handling() |
|
{ |
|
LANG=C nmcli -t --fields device,state dev status 2> /dev/null | |
|
grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$" |
|
} |
|
|
|
# $1: netdev name |
|
get_ifcfg_nmcli() |
|
{ |
|
local nm_uuid nm_name |
|
local ifcfg_file |
|
|
|
# Get the active nmcli config name of $1 |
|
if is_nm_running && is_nm_handling "${1}"; then |
|
# The configuration "uuid" and "name" generated by nm is wrote to |
|
# the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>". |
|
nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2> /dev/null | |
|
grep "${1}" | head -1 | cut -d':' -f1) |
|
nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2> /dev/null | |
|
grep "${1}" | head -1 | cut -d':' -f1) |
|
ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}") |
|
[[ -z ${ifcfg_file} ]] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}") |
|
fi |
|
|
|
echo -n "${ifcfg_file}" |
|
} |
|
|
|
# $1: netdev name |
|
get_ifcfg_legacy() |
|
{ |
|
local ifcfg_file hwaddr |
|
|
|
ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}" |
|
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return |
|
|
|
ifcfg_file=$(get_ifcfg_by_name "${1}") |
|
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return |
|
|
|
hwaddr=$(get_hwaddr "${1}") |
|
if [[ -n $hwaddr ]]; then |
|
ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}") |
|
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return |
|
fi |
|
|
|
ifcfg_file=$(get_ifcfg_by_device "${1}") |
|
|
|
echo -n "${ifcfg_file}" |
|
} |
|
|
|
# $1: netdev name |
|
# Return the ifcfg file whole name(including the path) of $1 if any. |
|
get_ifcfg_filename() |
|
{ |
|
local ifcfg_file |
|
|
|
ifcfg_file=$(get_ifcfg_nmcli "${1}") |
|
if [[ -z ${ifcfg_file} ]]; then |
|
ifcfg_file=$(get_ifcfg_legacy "${1}") |
|
fi |
|
|
|
echo -n "${ifcfg_file}" |
|
} |
|
|
|
# returns 0 when omission of a module is desired in dracut_args |
|
# returns 1 otherwise |
|
is_dracut_mod_omitted() |
|
{ |
|
local dracut_args dracut_mod=$1 |
|
|
|
set -- $(kdump_get_conf_val dracut_args) |
|
while [ $# -gt 0 ]; do |
|
case $1 in |
|
-o | --omit) |
|
[[ " ${2//[^[:alnum:]]/ } " == *" $dracut_mod "* ]] && return 0 |
|
;; |
|
esac |
|
shift |
|
done |
|
|
|
return 1 |
|
} |
|
|
|
is_wdt_active() |
|
{ |
|
local active |
|
|
|
[[ -d /sys/class/watchdog ]] || return 1 |
|
for dir in /sys/class/watchdog/*; do |
|
[[ -f "$dir/state" ]] || continue |
|
active=$(< "$dir/state") |
|
[[ $active == "active" ]] && return 0 |
|
done |
|
return 1 |
|
} |
|
|
|
have_compression_in_dracut_args() |
|
{ |
|
[[ "$(kdump_get_conf_val dracut_args)" =~ \ |
|
(^|[[:space:]])--(gzip|bzip2|lzma|xz|lzo|lz4|zstd|no-compress|compress)([[:space:]]|$) ]] |
|
} |
|
|
|
# If "dracut_args" contains "--mount" information, use it |
|
# directly without any check(users are expected to ensure |
|
# its correctness). |
|
is_mount_in_dracut_args() |
|
{ |
|
[[ " $(kdump_get_conf_val dracut_args)" =~ .*[[:space:]]--mount[=[:space:]].* ]] |
|
} |
|
|
|
check_crash_mem_reserved() |
|
{ |
|
local mem_reserved |
|
|
|
mem_reserved=$(< /sys/kernel/kexec_crash_size) |
|
if [[ $mem_reserved -eq 0 ]]; then |
|
derror "No memory reserved for crash kernel" |
|
return 1 |
|
fi |
|
|
|
return 0 |
|
} |
|
|
|
check_kdump_feasibility() |
|
{ |
|
if [[ ! -e /sys/kernel/kexec_crash_loaded ]]; then |
|
derror "Kdump is not supported on this kernel" |
|
return 1 |
|
fi |
|
check_crash_mem_reserved |
|
return $? |
|
} |
|
|
|
check_current_kdump_status() |
|
{ |
|
if [[ ! -f /sys/kernel/kexec_crash_loaded ]]; then |
|
derror "Perhaps CONFIG_CRASH_DUMP is not enabled in kernel" |
|
return 1 |
|
fi |
|
|
|
rc=$(< /sys/kernel/kexec_crash_loaded) |
|
if [[ $rc == 1 ]]; then |
|
return 0 |
|
else |
|
return 1 |
|
fi |
|
} |
|
|
|
# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>] |
|
# Remove a list of kernel parameters from a given kernel cmdline and print the result. |
|
# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists. |
|
remove_cmdline_param() |
|
{ |
|
local cmdline=$1 |
|
shift |
|
|
|
for arg in "$@"; do |
|
cmdline=$(echo "$cmdline" | |
|
sed -e "s/\b$arg=[^ ]*//g" \ |
|
-e "s/^$arg\b//g" \ |
|
-e "s/[[:space:]]$arg\b//g" \ |
|
-e "s/\s\+/ /g") |
|
done |
|
echo "$cmdline" |
|
} |
|
|
|
# |
|
# This function returns the "apicid" of the boot |
|
# cpu (cpu 0) if present. |
|
# |
|
get_bootcpu_apicid() |
|
{ |
|
awk ' \ |
|
BEGIN { CPU = "-1"; } \ |
|
$1=="processor" && $2==":" { CPU = $NF; } \ |
|
CPU=="0" && /^apicid/ { print $NF; } \ |
|
' \ |
|
/proc/cpuinfo |
|
} |
|
|
|
# |
|
# append_cmdline <kernel cmdline> <parameter name> <parameter value> |
|
# This function appends argument "$2=$3" to string ($1) if not already present. |
|
# |
|
append_cmdline() |
|
{ |
|
local cmdline=$1 |
|
local newstr=${cmdline/$2/""} |
|
|
|
# unchanged str implies argument wasn't there |
|
if [[ $cmdline == "$newstr" ]]; then |
|
cmdline="${cmdline} ${2}=${3}" |
|
fi |
|
|
|
echo "$cmdline" |
|
} |
|
|
|
# This function check iomem and determines if we have more than |
|
# 4GB of ram available. Returns 1 if we do, 0 if we dont |
|
need_64bit_headers() |
|
{ |
|
return "$(tail -n 1 /proc/iomem | awk '{ split ($1, r, "-"); |
|
print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }')" |
|
} |
|
|
|
# Check if secure boot is being enforced. |
|
# |
|
# Per Peter Jones, we need check efivar SecureBoot-$(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 |
|
|
|
# On powerpc, secure boot is enforced if: |
|
# host secure boot: /ibm,secure-boot/os-secureboot-enforcing DT property exists |
|
# guest secure boot: /ibm,secure-boot >= 2 |
|
if [[ -f /proc/device-tree/ibm,secureboot/os-secureboot-enforcing ]]; then |
|
return 0 |
|
fi |
|
if [[ -f /proc/device-tree/ibm,secure-boot ]] && |
|
[[ $(lsprop /proc/device-tree/ibm,secure-boot | tail -1) -ge 2 ]]; then |
|
return 0 |
|
fi |
|
|
|
# Detect secure boot on x86 and arm64 |
|
secure_boot_file=$(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" ]] && [[ $setup_mode_byte == "0" ]]; then |
|
return 0 |
|
fi |
|
fi |
|
|
|
# Detect secure boot on s390x |
|
if [[ -e "/sys/firmware/ipl/secure" && "$(< /sys/firmware/ipl/secure)" == "1" ]]; then |
|
return 0 |
|
fi |
|
|
|
return 1 |
|
} |
|
|
|
# |
|
# prepare_kexec_args <kexec args> |
|
# This function prepares kexec argument. |
|
# |
|
prepare_kexec_args() |
|
{ |
|
local kexec_args=$1 |
|
local found_elf_args |
|
|
|
ARCH=$(uname -m) |
|
if [[ $ARCH == "i686" ]] || [[ $ARCH == "i386" ]]; then |
|
need_64bit_headers |
|
if [[ $? == 1 ]]; then |
|
found_elf_args=$(echo "$kexec_args" | grep elf32-core-headers) |
|
if [[ -n $found_elf_args ]]; then |
|
dwarn "Warning: elf32-core-headers overrides correct elf64 setting" |
|
else |
|
kexec_args="$kexec_args --elf64-core-headers" |
|
fi |
|
else |
|
found_elf_args=$(echo "$kexec_args" | grep elf64-core-headers) |
|
if [[ -z $found_elf_args ]]; then |
|
kexec_args="$kexec_args --elf32-core-headers" |
|
fi |
|
fi |
|
fi |
|
echo "$kexec_args" |
|
} |
|
|
|
# |
|
# Detect initrd and kernel location, results are stored in global enviromental variables: |
|
# KDUMP_BOOTDIR, KDUMP_KERNELVER, KDUMP_KERNEL, DEFAULT_INITRD, and KDUMP_INITRD |
|
# |
|
# Expectes KDUMP_BOOTDIR, KDUMP_IMG, KDUMP_IMG_EXT, KDUMP_KERNELVER to be loaded from config already |
|
# and will prefer already set values so user can specify custom kernel/initramfs location |
|
# |
|
prepare_kdump_bootinfo() |
|
{ |
|
local boot_img boot_imglist boot_dirlist boot_initrdlist |
|
local machine_id |
|
|
|
if [[ -z $KDUMP_KERNELVER ]]; then |
|
KDUMP_KERNELVER="$(uname -r)" |
|
fi |
|
|
|
read -r machine_id < /etc/machine-id |
|
boot_dirlist=${KDUMP_BOOTDIR:-"/boot /boot/efi /efi /"} |
|
boot_imglist="$KDUMP_IMG-$KDUMP_KERNELVER$KDUMP_IMG_EXT $machine_id/$KDUMP_KERNELVER/$KDUMP_IMG" |
|
|
|
# Use BOOT_IMAGE as reference if possible, strip the GRUB root device prefix in (hd0,gpt1) format |
|
boot_img="$(sed "s/^BOOT_IMAGE=\((\S*)\)\?\(\S*\) .*/\2/" /proc/cmdline)" |
|
if [[ -n $boot_img ]]; then |
|
boot_imglist="$boot_img $boot_imglist" |
|
fi |
|
|
|
for dir in $boot_dirlist; do |
|
for img in $boot_imglist; do |
|
if [[ -f "$dir/$img" ]]; then |
|
KDUMP_KERNEL=$(echo "$dir/$img" | tr -s '/') |
|
break 2 |
|
fi |
|
done |
|
done |
|
|
|
if ! [[ -e $KDUMP_KERNEL ]]; then |
|
derror "Failed to detect kdump kernel location" |
|
return 1 |
|
fi |
|
|
|
# Set KDUMP_BOOTDIR to where kernel image is stored |
|
KDUMP_BOOTDIR=$(dirname "$KDUMP_KERNEL") |
|
|
|
# Default initrd should just stay aside of kernel image, try to find it in KDUMP_BOOTDIR |
|
boot_initrdlist="initramfs-$KDUMP_KERNELVER.img initrd" |
|
for initrd in $boot_initrdlist; do |
|
if [[ -f "$KDUMP_BOOTDIR/$initrd" ]]; then |
|
defaut_initrd_base="$initrd" |
|
DEFAULT_INITRD="$KDUMP_BOOTDIR/$defaut_initrd_base" |
|
break |
|
fi |
|
done |
|
|
|
# Create kdump initrd basename from default initrd basename |
|
# initramfs-5.7.9-200.fc32.x86_64.img => initramfs-5.7.9-200.fc32.x86_64kdump.img |
|
# initrd => initrdkdump |
|
if [[ -z $defaut_initrd_base ]]; then |
|
kdump_initrd_base=initramfs-${KDUMP_KERNELVER}kdump.img |
|
elif [[ $defaut_initrd_base == *.* ]]; then |
|
kdump_initrd_base=${defaut_initrd_base%.*}kdump.${DEFAULT_INITRD##*.} |
|
else |
|
kdump_initrd_base=${defaut_initrd_base}kdump |
|
fi |
|
|
|
# Place kdump initrd in $(/var/lib/kdump) if $(KDUMP_BOOTDIR) not writable |
|
if [[ ! -w $KDUMP_BOOTDIR ]]; then |
|
var_target_initrd_dir="/var/lib/kdump" |
|
mkdir -p "$var_target_initrd_dir" |
|
KDUMP_INITRD="$var_target_initrd_dir/$kdump_initrd_base" |
|
else |
|
KDUMP_INITRD="$KDUMP_BOOTDIR/$kdump_initrd_base" |
|
fi |
|
} |
|
|
|
get_watchdog_drvs() |
|
{ |
|
local _wdtdrvs _drv _dir |
|
|
|
for _dir in /sys/class/watchdog/*; do |
|
# device/modalias will return driver of this device |
|
[[ -f "$_dir/device/modalias" ]] || continue |
|
_drv=$(< "$_dir/device/modalias") |
|
_drv=$(modprobe --set-version "$KDUMP_KERNELVER" -R "$_drv" 2> /dev/null) |
|
for i in $_drv; do |
|
if ! [[ " $_wdtdrvs " == *" $i "* ]]; then |
|
_wdtdrvs="$_wdtdrvs $i" |
|
fi |
|
done |
|
done |
|
|
|
echo "$_wdtdrvs" |
|
} |
|
|
|
# |
|
# prepare_cmdline <commandline> <commandline remove> <commandline append> |
|
# This function performs a series of edits on the command line. |
|
# Store the final result in global $KDUMP_COMMANDLINE. |
|
prepare_cmdline() |
|
{ |
|
local cmdline id arg |
|
|
|
if [[ -z $1 ]]; then |
|
cmdline=$(< /proc/cmdline) |
|
else |
|
cmdline="$1" |
|
fi |
|
|
|
# These params should always be removed |
|
cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn) |
|
# These params can be removed configurably |
|
while read -r arg; do |
|
cmdline=$(remove_cmdline_param "$cmdline" "$arg") |
|
done <<< "$(echo "$2" | xargs -n 1 echo)" |
|
|
|
# Always remove "root=X", as we now explicitly generate all kinds |
|
# of dump target mount information including root fs. |
|
# |
|
# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares |
|
# about it(e.g. for debug purpose), then can pass "root=X" using |
|
# KDUMP_COMMANDLINE_APPEND. |
|
cmdline=$(remove_cmdline_param "$cmdline" root) |
|
|
|
# With the help of "--hostonly-cmdline", we can avoid some interitage. |
|
cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid rd.md.uuid fcoe) |
|
|
|
# Remove netroot, rd.iscsi.initiator and iscsi_initiator since |
|
# we get duplicate entries for the same in case iscsi code adds |
|
# it as well. |
|
cmdline=$(remove_cmdline_param "$cmdline" netroot rd.iscsi.initiator iscsi_initiator) |
|
|
|
cmdline="${cmdline} $3" |
|
|
|
id=$(get_bootcpu_apicid) |
|
if [[ -n ${id} ]]; then |
|
cmdline=$(append_cmdline "$cmdline" disable_cpu_apicid "$id") |
|
fi |
|
|
|
# If any watchdog is used, set it's pretimeout to 0. pretimeout let |
|
# watchdog panic the kernel first, and reset the system after the |
|
# panic. If the system is already in kdump, panic is not helpful |
|
# and only increase the chance of watchdog failure. |
|
for i in $(get_watchdog_drvs); do |
|
cmdline+=" $i.pretimeout=0" |
|
|
|
if [[ $i == hpwdt ]]; then |
|
# hpwdt have a special parameter kdumptimeout, is's only suppose |
|
# to be set to non-zero in first kernel. In kdump, non-zero |
|
# value could prevent the watchdog from resetting the system. |
|
cmdline+=" $i.kdumptimeout=0" |
|
fi |
|
done |
|
|
|
echo "$cmdline" |
|
} |
|
|
|
#get system memory size in the unit of GB |
|
get_system_size() |
|
{ |
|
result=$(grep "System RAM" /proc/iomem | awk -F ":" '{ print $1 }' | tr "[:lower:]" "[:upper:]" | paste -sd+) |
|
result="+$result" |
|
# replace '-' with '+0x' and '+' with '-0x' |
|
sum=$(echo "$result" | sed -e 's/-/K0x/g' -e 's/+/-0x/g' -e 's/K/+/g') |
|
size=$(printf "%d\n" $((sum))) |
|
size=$((size / 1024 / 1024 / 1024)) |
|
|
|
echo "$size" |
|
} |
|
|
|
get_recommend_size() |
|
{ |
|
local mem_size=$1 |
|
local _ck_cmdline=$2 |
|
local OLDIFS="$IFS" |
|
|
|
start=${_ck_cmdline::1} |
|
if [[ $mem_size -lt $start ]]; then |
|
echo "0M" |
|
return |
|
fi |
|
IFS=',' |
|
for i in $_ck_cmdline; do |
|
end=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $1 }') |
|
recommend=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $2 }') |
|
size=${end::-1} |
|
unit=${end: -1} |
|
if [[ $unit == 'T' ]]; then |
|
size=$((size * 1024)) |
|
fi |
|
if [[ $mem_size -lt $size ]]; then |
|
echo "$recommend" |
|
IFS="$OLDIFS" |
|
return |
|
fi |
|
done |
|
IFS="$OLDIFS" |
|
} |
|
|
|
# get default crashkernel |
|
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable |
|
kdump_get_arch_recommend_crashkernel() |
|
{ |
|
local _arch _ck_cmdline _dump_mode |
|
|
|
if [[ -z "$1" ]]; then |
|
if is_fadump_capable; then |
|
_dump_mode=fadump |
|
else |
|
_dump_mode=kdump |
|
fi |
|
else |
|
_dump_mode=$1 |
|
fi |
|
|
|
_arch=$(uname -m) |
|
|
|
if [[ $_arch == "x86_64" ]] || [[ $_arch == "s390x" ]]; then |
|
_ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M" |
|
elif [[ $_arch == "aarch64" ]]; then |
|
_ck_cmdline="2G-:448M" |
|
elif [[ $_arch == "ppc64le" ]]; then |
|
if [[ $_dump_mode == "fadump" ]]; then |
|
_ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G" |
|
else |
|
_ck_cmdline="2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G" |
|
fi |
|
fi |
|
|
|
echo -n "$_ck_cmdline" |
|
} |
|
|
|
# return recommended size based on current system RAM size |
|
# $1: kernel version, if not set, will defaults to $(uname -r) |
|
kdump_get_arch_recommend_size() |
|
{ |
|
local _ck_cmdline _sys_mem |
|
|
|
if ! [[ -r "/proc/iomem" ]]; then |
|
echo "Error, can not access /proc/iomem." |
|
return 1 |
|
fi |
|
_sys_mem=$(get_system_size) |
|
_ck_cmdline=$(kdump_get_arch_recommend_crashkernel) |
|
_ck_cmdline=${_ck_cmdline//-:/-102400T:} |
|
get_recommend_size "$_sys_mem" "$_ck_cmdline" |
|
} |
|
|
|
# Print all underlying crypt devices of a block device |
|
# print nothing if device is not on top of a crypt device |
|
# $1: the block device to be checked in maj:min format |
|
get_luks_crypt_dev() |
|
{ |
|
local _type |
|
|
|
[[ -b /dev/block/$1 ]] || return 1 |
|
|
|
_type=$(eval "$(blkid -u filesystem,crypto -o export -- "/dev/block/$1"); echo \$TYPE") |
|
[[ $_type == "crypto_LUKS" ]] && echo "$1" |
|
|
|
for _x in "/sys/dev/block/$1/slaves/"*; do |
|
[[ -f $_x/dev ]] || continue |
|
[[ $_x/subsystem -ef /sys/class/block ]] || continue |
|
get_luks_crypt_dev "$(< "$_x/dev")" |
|
done |
|
} |
|
|
|
# kdump_get_maj_min <device> |
|
# Prints the major and minor of a device node. |
|
# Example: |
|
# $ get_maj_min /dev/sda2 |
|
# 8:2 |
|
kdump_get_maj_min() |
|
{ |
|
local _majmin |
|
_majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)" |
|
printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))" |
|
} |
|
|
|
get_all_kdump_crypt_dev() |
|
{ |
|
local _dev |
|
|
|
for _dev in $(get_block_dump_target); do |
|
get_luks_crypt_dev "$(kdump_get_maj_min "$_dev")" |
|
done |
|
} |
|
|
|
check_vmlinux() |
|
{ |
|
# Use readelf to check if it's a valid ELF |
|
readelf -h "$1" &> /dev/null || return 1 |
|
} |
|
|
|
get_vmlinux_size() |
|
{ |
|
local size=0 _msize |
|
|
|
while read -r _msize; do |
|
size=$((size + _msize)) |
|
done <<< "$(readelf -l -W "$1" | awk '/^ LOAD/{print $6}' 2> /dev/stderr)" |
|
|
|
echo $size |
|
} |
|
|
|
try_decompress() |
|
{ |
|
# The obscure use of the "tr" filter is to work around older versions of |
|
# "grep" that report the byte offset of the line instead of the pattern. |
|
|
|
# Try to find the header ($1) and decompress from here |
|
for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"); do |
|
if ! type -P "$3" > /dev/null; then |
|
ddebug "Signiature detected but '$3' is missing, skip this decompressor" |
|
break |
|
fi |
|
|
|
pos=${pos%%:*} |
|
tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null |
|
if check_vmlinux "$5"; then |
|
ddebug "Kernel is extracted with '$3'" |
|
return 0 |
|
fi |
|
done |
|
|
|
return 1 |
|
} |
|
|
|
# Borrowed from linux/scripts/extract-vmlinux |
|
get_kernel_size() |
|
{ |
|
# Prepare temp files: |
|
local tmp img=$1 |
|
|
|
tmp=$(mktemp /tmp/vmlinux-XXX) |
|
trap 'rm -f "$tmp"' 0 |
|
|
|
# Try to check if it's a vmlinux already |
|
check_vmlinux "$img" && get_vmlinux_size "$img" && return 0 |
|
|
|
# That didn't work, so retry after decompression. |
|
try_decompress '\037\213\010' xy gunzip "$img" "$tmp" || |
|
try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" || |
|
try_decompress 'BZh' xy bunzip2 "$img" "$tmp" || |
|
try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" || |
|
try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" || |
|
try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" || |
|
try_decompress '(\265/\375' xxx unzstd "$img" "$tmp" |
|
|
|
# Finally check for uncompressed images or objects: |
|
[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0 |
|
|
|
# Fallback to use iomem |
|
local _size=0 _seg |
|
while read -r _seg; do |
|
_size=$((_size + 0x${_seg#*-} - 0x${_seg%-*})) |
|
done <<< "$(grep -E "Kernel (code|rodata|data|bss)" /proc/iomem | cut -d ":" -f 1)" |
|
echo $_size |
|
}
|
|
|