#!/bin/bash
kdump_module_init() {
if ! [[ -d "${initdir}/tmp" ]]; then
mkdir -p "${initdir}/tmp"
fi
. /lib/kdump/kdump-lib.sh
}
check() {
[[ $debug ]] && set -x
#kdumpctl sets this explicitly
if [[ -z $IN_KDUMP ]] || [[ ! -f /etc/kdump.conf ]]; then
return 1
fi
return 0
}
depends() {
local _dep="base shutdown"
kdump_module_init
add_opt_module() {
[[ " $omit_dracutmodules " != *\ $1\ * ]] && _dep="$_dep $1"
}
if is_squash_available; then
add_opt_module squash
else
dwarning "Required modules to build a squashed kdump image is missing!"
fi
if is_wdt_active; then
add_opt_module watchdog
fi
if is_ssh_dump_target; then
_dep="$_dep ssh-client"
fi
if [[ "$(uname -m)" == "s390x" ]]; then
_dep="$_dep znet"
fi
if [[ -n "$(ls -A /sys/class/drm 2> /dev/null)" ]] || [[ -d /sys/module/hyperv_fb ]]; then
add_opt_module drm
fi
if is_generic_fence_kdump || is_pcs_fence_kdump; then
_dep="$_dep network"
fi
echo "$_dep"
}
kdump_is_bridge() {
[[ -d /sys/class/net/"$1"/bridge ]]
}
kdump_is_bond() {
[[ -d /sys/class/net/"$1"/bonding ]]
}
kdump_is_team() {
[[ -f /usr/bin/teamnl ]] && teamnl "$1" ports &> /dev/null
}
kdump_is_vlan() {
[[ -f /proc/net/vlan/"$1" ]]
}
# $1: netdev name
source_ifcfg_file() {
local ifcfg_file
dwarning "Network Scripts are deprecated. You are encouraged to set up network by NetworkManager."
ifcfg_file=$(get_ifcfg_filename "$1")
if [[ -f ${ifcfg_file} ]]; then
. "${ifcfg_file}"
else
dwarning "The ifcfg file of $1 is not found!"
fi
}
kdump_setup_dns() {
local _netdev="$1"
local _conpath="$2"
local _nameserver _dns _tmp array
local _dnsfile=${initdir}/etc/cmdline.d/42dns.conf
_tmp=$(get_nmcli_field_by_conpath "IP4.DNS" "$_conpath")
# shellcheck disable=SC2206
array=(${_tmp//|/ })
if [[ ${array[*]} ]]; then
for _dns in "${array[@]}"; do
echo "nameserver=$_dns" >> "$_dnsfile"
done
else
dwarning "Failed to get DNS info via nmcli output. Now try sourcing ifcfg script"
source_ifcfg_file "$_netdev"
[[ -n $DNS1 ]] && echo "nameserver=$DNS1" > "$_dnsfile"
[[ -n $DNS2 ]] && echo "nameserver=$DNS2" >> "$_dnsfile"
fi
while read -r content; do
_nameserver=$(echo "$content" | grep ^nameserver)
[[ -z $_nameserver ]] && continue
_dns=$(echo "$_nameserver" | awk '{print $2}')
[[ -z $_dns ]] && continue
if [[ ! -f $_dnsfile ]] || ! grep -q "$_dns" "$_dnsfile"; then
echo "nameserver=$_dns" >> "$_dnsfile"
fi
done < "/etc/resolv.conf"
}
# $1: repeat times
# $2: string to be repeated
# $3: separator
repeatedly_join_str() {
local _count="$1"
local _str="$2"
local _separator="$3"
local i _res
if [[ $_count -le 0 ]]; then
echo -n ""
return
fi
i=0
_res="$_str"
((_count--))
while [[ $i -lt $_count ]]; do
((i++))
_res="${_res}${_separator}${_str}"
done
echo -n "$_res"
}
# $1: prefix
# $2: ipv6_flag="-6" indicates it's IPv6
# Given a prefix, calculate the netmask (equivalent of "ipcalc -m")
# by concatenating three parts,
# 1) the groups with all bits set 1
# 2) a group with partial bits set to 0
# 3) the groups with all bits set to 0
cal_netmask_by_prefix() {
local _prefix="$1"
local _ipv6_flag="$2" _ipv6
local _bits_per_octet=8
local _count _res _octets_per_group _octets_total _seperator _total_groups
local _max_group_value _max_group_value_repr _bits_per_group _tmp _zero_bits
if [[ $_ipv6_flag == "-6" ]]; then
_ipv6=1
else
_ipv6=0
fi
if [[ $_prefix -lt 0 || $_prefix -gt 128 ]] \
|| ( ((!_ipv6)) && [[ $_prefix -gt 32 ]]); then
derror "Bad prefix:$_prefix for calculating netmask"
exit 1
fi
if ((_ipv6)); then
_octets_per_group=2
_octets_total=16
_seperator=":"
else
_octets_per_group=1
_octets_total=4
_seperator="."
fi
_total_groups=$((_octets_total / _octets_per_group))
_bits_per_group=$((_octets_per_group * _bits_per_octet))
_max_group_value=$(((1 << _bits_per_group) - 1))
if ((_ipv6)); then
_max_group_value_repr=$(printf "%x" $_max_group_value)
else
_max_group_value_repr="$_max_group_value"
fi
_count=$((_prefix / _octets_per_group / _bits_per_octet))
_first_part=$(repeatedly_join_str "$_count" "$_max_group_value_repr" "$_seperator")
_res="$_first_part"
_tmp=$((_octets_total * _bits_per_octet - _prefix))
_zero_bits=$((_tmp % _bits_per_group))
if [[ $_zero_bits -ne 0 ]]; then
_second_part=$((_max_group_value >> _zero_bits << _zero_bits))
if ((_ipv6)); then
_second_part=$(printf "%x" $_second_part)
fi
((_count++))
if [[ -z $_first_part ]]; then
_res="$_second_part"
else
_res="${_first_part}${_seperator}${_second_part}"
fi
fi
_count=$((_total_groups - _count))
if [[ $_count -eq 0 ]]; then
echo -n "$_res"
return
fi
if ((_ipv6)) && [[ $_count -gt 1 ]]; then
# use condensed notion for IPv6
_third_part=":"
else
_third_part=$(repeatedly_join_str "$_count" "0" "$_seperator")
fi
if [[ -z $_res ]] && ((!_ipv6)); then
echo -n "${_third_part}"
else
echo -n "${_res}${_seperator}${_third_part}"
fi
}
#$1: netdev name
#$2: srcaddr
#if it use static ip echo it, or echo null
kdump_static_ip() {
local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
local _netmask _gateway _ipaddr _target _nexthop _prefix
_ipaddr=$(ip addr show dev "$_netdev" permanent | awk "/ $_srcaddr\/.* /{print \$2}")
if is_ipv6_address "$_srcaddr"; then
_ipv6_flag="-6"
fi
if [[ -n $_ipaddr ]]; then
_gateway=$(ip $_ipv6_flag route list dev "$_netdev" \
| awk '/^default /{print $3}' | head -n 1)
if [[ "x" != "x"$_ipv6_flag ]]; then
# _ipaddr="2002::56ff:feb6:56d5/64", _netmask is the number after "/"
_netmask=${_ipaddr#*\/}
_srcaddr="[$_srcaddr]"
_gateway="[$_gateway]"
else
_prefix=$(cut -d'/' -f2 <<< "$_ipaddr")
if ! _netmask=$(cal_netmask_by_prefix "$_prefix" "$_ipv6_flag"); then
derror "Failed to calculate netmask for $_ipaddr"
exit 1
fi
fi
echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
fi
/sbin/ip $_ipv6_flag route show | grep -v default \
| grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" \
| while read -r _route; do
_target=$(echo "$_route" | awk '{print $1}')
_nexthop=$(echo "$_route" | awk '{print $3}')
if [[ "x" != "x"$_ipv6_flag ]]; then
_target="[$_target]"
_nexthop="[$_nexthop]"
fi
echo "rd.route=$_target:$_nexthop:$kdumpnic"
done >> "${initdir}/etc/cmdline.d/45route-static.conf"
kdump_handle_mulitpath_route "$_netdev" "$_srcaddr" "$kdumpnic"
}
kdump_handle_mulitpath_route() {
local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
local _target _nexthop _route _weight _max_weight _rule
if is_ipv6_address "$_srcaddr"; then
_ipv6_flag="-6"
fi
while IFS="" read -r _route; do
if [[ $_route =~ [[:space:]]+nexthop ]]; then
_route=${_route##[[:space:]]}
# Parse multipath route, using previous _target
[[ $_target == 'default' ]] && continue
[[ $_route =~ .*via.*\ $_netdev ]] || continue
_weight=$(echo "$_route" | cut -d ' ' -f7)
if [[ $_weight -gt $_max_weight ]]; then
_nexthop=$(echo "$_route" | cut -d ' ' -f3)
_max_weight=$_weight
if [[ "x" != "x"$_ipv6_flag ]]; then
_rule="rd.route=[$_target]:[$_nexthop]:$kdumpnic"
else
_rule="rd.route=$_target:$_nexthop:$kdumpnic"
fi
fi
else
[[ -n $_rule ]] && echo "$_rule"
_target=$(echo "$_route" | cut -d ' ' -f1)
_rule="" _max_weight=0 _weight=0
fi
done >> "${initdir}/etc/cmdline.d/45route-static.conf" \
<<< "$(/sbin/ip $_ipv6_flag route show)"
[[ -n $_rule ]] && echo "$_rule" >> "${initdir}/etc/cmdline.d/45route-static.conf"
}
kdump_get_mac_addr() {
cat "/sys/class/net/$1/address"
}
#Bonding or team master modifies the mac address
#of its slaves, we should use perm address
kdump_get_perm_addr() {
local addr
addr=$(ethtool -P "$1" | sed -e 's/Permanent address: //')
if [[ -z $addr ]] || [[ $addr == "00:00:00:00:00:00" ]]; then
derror "Can't get the permanent address of $1"
else
echo "$addr"
fi
}
# Prefix kernel assigned names with "kdump-". EX: eth0 -> kdump-eth0
# Because kernel assigned names are not persistent between 1st and 2nd
# kernel. We could probably end up with eth0 being eth1, eth0 being
# eth1, and naming conflict happens.
kdump_setup_ifname() {
local _ifname
# If ifname already has 'kdump-' prefix, we must be switching from
# fadump to kdump. Skip prefixing 'kdump-' in this case as adding
# another prefix may truncate the ifname. Since an ifname with
# 'kdump-' is already persistent, this should be fine.
if [[ $1 =~ eth* ]] && [[ ! $1 =~ ^kdump-* ]]; then
_ifname="kdump-$1"
else
_ifname="$1"
fi
echo "$_ifname"
}
kdump_setup_bridge() {
local _netdev=$1
local _brif _dev _mac _kdumpdev
for _dev in "/sys/class/net/$_netdev/brif/"*; do
[[ -e $_dev ]] || continue
_dev=${_dev##*/}
_kdumpdev=$_dev
if kdump_is_bond "$_dev"; then
(kdump_setup_bond "$_dev" "$(get_nmcli_connection_apath_by_ifname "$_dev")") || exit 1
elif kdump_is_team "$_dev"; then
kdump_setup_team "$_dev"
elif kdump_is_vlan "$_dev"; then
kdump_setup_vlan "$_dev"
else
_mac=$(kdump_get_mac_addr "$_dev")
_kdumpdev=$(kdump_setup_ifname "$_dev")
echo -n " ifname=$_kdumpdev:$_mac" >> "${initdir}/etc/cmdline.d/41bridge.conf"
fi
_brif+="$_kdumpdev,"
done
echo " bridge=$_netdev:${_brif%,}" >> "${initdir}/etc/cmdline.d/41bridge.conf"
}
# drauct takes bond=<bondname>[:<bondslaves>:[:<options>]] syntax to parse
# bond. For example:
# bond=bond0:eth0,eth1:mode=balance-rr
kdump_setup_bond() {
local _netdev="$1"
local _conpath="$2"
local _dev _mac _slaves _kdumpdev _bondoptions
for _dev in $(cat "/sys/class/net/$_netdev/bonding/slaves"); do
_mac=$(kdump_get_perm_addr "$_dev")
_kdumpdev=$(kdump_setup_ifname "$_dev")
echo -n " ifname=$_kdumpdev:$_mac" >> "${initdir}/etc/cmdline.d/42bond.conf"
_slaves+="$_kdumpdev,"
done
echo -n " bond=$_netdev:${_slaves%,}" >> "${initdir}/etc/cmdline.d/42bond.conf"
_bondoptions=$(get_nmcli_field_by_conpath "bond.options" "$_conpath")
if [[ -z $_bondoptions ]]; then
dwarning "Failed to get bond configuration via nmlci output. Now try sourcing ifcfg script."
source_ifcfg_file "$_netdev"
_bondoptions="$(echo "$BONDING_OPTS" | xargs echo | tr " " ",")"
fi
if [[ -z $_bondoptions ]]; then
derror "Get empty bond options"
exit 1
fi
echo ":$_bondoptions" >> "${initdir}/etc/cmdline.d/42bond.conf"
}
kdump_setup_team() {
local _netdev=$1
local _dev _mac _slaves _kdumpdev
for _dev in $(teamnl "$_netdev" ports | awk -F':' '{print $2}'); do
_mac=$(kdump_get_perm_addr "$_dev")
_kdumpdev=$(kdump_setup_ifname "$_dev")
echo -n " ifname=$_kdumpdev:$_mac" >> "${initdir}/etc/cmdline.d/44team.conf"
_slaves+="$_kdumpdev,"
done
echo " team=$_netdev:${_slaves%,}" >> "${initdir}/etc/cmdline.d/44team.conf"
#Buggy version teamdctl outputs to stderr!
#Try to use the latest version of teamd.
if ! teamdctl "$_netdev" config dump > "${initdir}/tmp/$$-$_netdev.conf"; then
derror "teamdctl failed."
exit 1
fi
inst_dir /etc/teamd
inst_simple "${initdir}/tmp/$$-$_netdev.conf" "/etc/teamd/$_netdev.conf"
rm -f "${initdir}/tmp/$$-$_netdev.conf"
}
kdump_setup_vlan() {
local _netdev=$1
local _phydev
local _netmac
local _kdumpdev
_phydev="$(awk '/^Device:/{print $2}' /proc/net/vlan/"$_netdev")"
_netmac="$(kdump_get_mac_addr "$_phydev")"
#Just support vlan over bond and team
if kdump_is_bridge "$_phydev"; then
derror "Vlan over bridge is not supported!"
exit 1
elif kdump_is_bond "$_phydev"; then
(kdump_setup_bond "$_phydev" "$(get_nmcli_connection_apath_by_ifname "$_phydev")") || exit 1
echo " vlan=$(kdump_setup_ifname "$_netdev"):$_phydev" > "${initdir}/etc/cmdline.d/43vlan.conf"
else
_kdumpdev="$(kdump_setup_ifname "$_phydev")"
echo " vlan=$(kdump_setup_ifname "$_netdev"):$_kdumpdev ifname=$_kdumpdev:$_netmac" > "${initdir}/etc/cmdline.d/43vlan.conf"
fi
}
# find online znet device
# return ifname (_netdev)
# code reaped from the list_configured function of
# https://github.com/hreinecke/s390-tools/blob/master/zconf/znetconf
find_online_znet_device() {
local CCWGROUPBUS_DEVICEDIR="/sys/bus/ccwgroup/devices"
local NETWORK_DEVICES d ifname ONLINE
[[ ! -d $CCWGROUPBUS_DEVICEDIR ]] && return
NETWORK_DEVICES=$(find $CCWGROUPBUS_DEVICEDIR)
for d in $NETWORK_DEVICES; do
[[ ! -f "$d/online" ]] && continue
read -r ONLINE < "$d/online"
if [[ $ONLINE -ne 1 ]]; then
continue
fi
# determine interface name, if there (only for qeth and if
# device is online)
if [[ -f $d/if_name ]]; then
read -r ifname < "$d/if_name"
elif [[ -d $d/net ]]; then
ifname=$(ls "$d/net/")
fi
[[ -n $ifname ]] && break
done
echo -n "$ifname"
}
# setup s390 znet cmdline
# $1: netdev (ifname)
# $2: nmcli connection path
kdump_setup_znet() {
local _netdev="$1"
local _conpath="$2"
local s390_prefix="802-3-ethernet.s390-"
local _options=""
local NETTYPE
local SUBCHANNELS
NETTYPE=$(get_nmcli_field_by_conpath "${s390_prefix}nettype" "$_conpath")
SUBCHANNELS=$(get_nmcli_field_by_conpath "${s390_prefix}subchannels" "$_conpath")
_options=$(get_nmcli_field_by_conpath "${s390_prefix}options" "$_conpath")
if [[ -z $NETTYPE || -z $SUBCHANNELS || -z $_options ]]; then
dwarning "Failed to get znet configuration via nmlci output. Now try sourcing ifcfg script."
source_ifcfg_file "$_netdev"
for i in $OPTIONS; do
_options=${_options},$i
done
fi
if [[ -z $NETTYPE || -z $SUBCHANNELS || -z $_options ]]; then
exit 1
fi
echo "rd.znet=${NETTYPE},${SUBCHANNELS},${_options} rd.znet_ifname=$_netdev:${SUBCHANNELS}" > "${initdir}/etc/cmdline.d/30znet.conf"
}
kdump_get_ip_route() {
local _route
if ! _route=$(/sbin/ip -o route get to "$1" 2>&1); then
derror "Bad kdump network destination: $1"
exit 1
fi
echo "$_route"
}
kdump_get_ip_route_field() {
echo "$1" | sed -n -e "s/^.*\<$2\>\s\+\(\S\+\).*$/\1/p"
}
kdump_get_remote_ip() {
local _remote _remote_temp
_remote=$(get_remote_host "$1")
if is_hostname "$_remote"; then
_remote_temp=$(getent ahosts "$_remote" | grep -v : | head -n 1)
if [[ -z $_remote_temp ]]; then
_remote_temp=$(getent ahosts "$_remote" | head -n 1)
fi
_remote=$(echo "$_remote_temp" | awk '{print $1}')
fi
echo "$_remote"
}
# Setup dracut to bring up network interface that enable
# initramfs accessing giving destination
# $1: destination host
kdump_install_net() {
local _destaddr _srcaddr _route _netdev _conpath kdumpnic
local _static _proto _ip_conf _ip_opts _ifname_opts
local _znet_netdev _znet_conpath
_destaddr=$(kdump_get_remote_ip "$1")
_route=$(kdump_get_ip_route "$_destaddr")
_srcaddr=$(kdump_get_ip_route_field "$_route" "src")
_netdev=$(kdump_get_ip_route_field "$_route" "dev")
_conpath=$(get_nmcli_connection_apath_by_ifname "$_netdev")
_netmac=$(kdump_get_mac_addr "$_netdev")
kdumpnic=$(kdump_setup_ifname "$_netdev")
_znet_netdev=$(find_online_znet_device)
if [[ -n $_znet_netdev ]]; then
_znet_conpath=$(get_nmcli_connection_apath_by_ifname "$_znet_netdev")
if ! (kdump_setup_znet "$_znet_netdev" "$_znet_conpath"); then
derror "Failed to set up znet"
exit 1
fi
fi
_static=$(kdump_static_ip "$_netdev" "$_srcaddr" "$kdumpnic")
if [[ -n $_static ]]; then
_proto=none
elif is_ipv6_address "$_srcaddr"; then
_proto=auto6
else
_proto=dhcp
fi
_ip_conf="${initdir}/etc/cmdline.d/40ip.conf"
_ip_opts=" ip=${_static}$kdumpnic:${_proto}"
# dracut doesn't allow duplicated configuration for same NIC, even they're exactly the same.
# so we have to avoid adding duplicates
# We should also check /proc/cmdline for existing ip=xx arg.
# For example, iscsi boot will specify ip=xxx arg in cmdline.
if [[ ! -f $_ip_conf ]] || ! grep -q "$_ip_opts" "$_ip_conf" \
&& ! grep -q "ip=[^[:space:]]*$_netdev" /proc/cmdline; then
echo "$_ip_opts" >> "$_ip_conf"
fi
if kdump_is_bridge "$_netdev"; then
kdump_setup_bridge "$_netdev"
elif kdump_is_bond "$_netdev"; then
(kdump_setup_bond "$_netdev" "$_conpath") || exit 1
elif kdump_is_team "$_netdev"; then
kdump_setup_team "$_netdev"
elif kdump_is_vlan "$_netdev"; then
kdump_setup_vlan "$_netdev"
else
_ifname_opts=" ifname=$kdumpnic:$_netmac"
echo "$_ifname_opts" >> "$_ip_conf"
fi
kdump_setup_dns "$_netdev" "$_conpath"
if [[ ! -f ${initdir}/etc/cmdline.d/50neednet.conf ]]; then
# network-manager module needs this parameter
echo "rd.neednet" >> "${initdir}/etc/cmdline.d/50neednet.conf"
fi
# Save netdev used for kdump as cmdline
# Whoever calling kdump_install_net() is setting up the default gateway,
# ie. bootdev/kdumpnic. So don't override the setting if calling
# kdump_install_net() for another time. For example, after setting eth0 as
# the default gate way for network dump, eth1 in the fence kdump path will
# call kdump_install_net again and we don't want eth1 to be the default
# gateway.
if [[ ! -f ${initdir}/etc/cmdline.d/60kdumpnic.conf ]] \
&& [[ ! -f ${initdir}/etc/cmdline.d/70bootdev.conf ]]; then
echo "kdumpnic=$kdumpnic" > "${initdir}/etc/cmdline.d/60kdumpnic.conf"
echo "bootdev=$kdumpnic" > "${initdir}/etc/cmdline.d/70bootdev.conf"
fi
}
# install etc/kdump/pre.d and /etc/kdump/post.d
kdump_install_pre_post_conf() {
if [[ -d /etc/kdump/pre.d ]]; then
for file in /etc/kdump/pre.d/*; do
if [[ -x $file ]]; then
dracut_install "$file"
elif [[ $file != "/etc/kdump/pre.d/*" ]]; then
echo "$file is not executable"
fi
done
fi
if [[ -d /etc/kdump/post.d ]]; then
for file in /etc/kdump/post.d/*; do
if [[ -x $file ]]; then
dracut_install "$file"
elif [[ $file != "/etc/kdump/post.d/*" ]]; then
echo "$file is not executable"
fi
done
fi
}
default_dump_target_install_conf() {
local _target _fstype
local _mntpoint _save_path
is_user_configured_dump_target && return
_save_path=$(get_bind_mount_source "$(get_save_path)")
_target=$(get_target_from_path "$_save_path")
_mntpoint=$(get_mntpoint_from_target "$_target")
_fstype=$(get_fs_type_from_target "$_target")
if is_fs_type_nfs "$_fstype"; then
kdump_install_net "$_target"
_fstype="nfs"
else
_target=$(kdump_get_persistent_dev "$_target")
fi
echo "$_fstype $_target" >> "${initdir}/tmp/$$-kdump.conf"
# don't touch the path under root mount
if [[ $_mntpoint != "/" ]]; then
_save_path=${_save_path##"$_mntpoint"}
fi
#erase the old path line, then insert the parsed path
sed -i "/^path/d" "${initdir}/tmp/$$-kdump.conf"
echo "path $_save_path" >> "${initdir}/tmp/$$-kdump.conf"
}
#install kdump.conf and what user specifies in kdump.conf
kdump_install_conf() {
local _opt _val _pdev
kdump_read_conf > "${initdir}/tmp/$$-kdump.conf"
while read -r _opt _val; do
# remove inline comments after the end of a directive.
case "$_opt" in
raw)
_pdev=$(persistent_policy="by-id" kdump_get_persistent_dev "$_val")
sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#" "${initdir}/tmp/$$-kdump.conf"
;;
ext[234] | xfs | btrfs | minix)
_pdev=$(kdump_get_persistent_dev "$_val")
sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#" "${initdir}/tmp/$$-kdump.conf"
;;
ssh | nfs)
kdump_install_net "$_val"
;;
dracut_args)
if [[ $(get_dracut_args_fstype "$_val") == nfs* ]]; then
kdump_install_net "$(get_dracut_args_target "$_val")"
fi
;;
kdump_pre | kdump_post | extra_bins)
# shellcheck disable=SC2086
dracut_install $_val
;;
core_collector)
dracut_install "${_val%%[[:blank:]]*}"
;;
esac
done <<< "$(kdump_read_conf)"
kdump_install_pre_post_conf
default_dump_target_install_conf
kdump_configure_fence_kdump "${initdir}/tmp/$$-kdump.conf"
inst "${initdir}/tmp/$$-kdump.conf" "/etc/kdump.conf"
rm -f "${initdir}/tmp/$$-kdump.conf"
}
# Default sysctl parameters should suffice for kdump kernel.
# Remove custom configurations sysctl.conf & sysctl.d/*
remove_sysctl_conf() {
# As custom configurations like vm.min_free_kbytes can lead
# to OOM issues in kdump kernel, avoid them
rm -f "${initdir}/etc/sysctl.conf"
rm -rf "${initdir}/etc/sysctl.d"
rm -rf "${initdir}/run/sysctl.d"
rm -rf "${initdir}/usr/lib/sysctl.d"
}
kdump_iscsi_get_rec_val() {
local result
# The open-iscsi 742 release changed to using flat files in
# /var/lib/iscsi.
result=$(/sbin/iscsiadm --show -m session -r "$1" | grep "^${2} = ")
result=${result##* = }
echo "$result"
}
kdump_get_iscsi_initiator() {
local _initiator
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
[[ -f $initiator_conf ]] || return 1
while read -r _initiator; do
[[ -z ${_initiator%%#*} ]] && continue # Skip comment lines
case $_initiator in
InitiatorName=*)
initiator=${_initiator#InitiatorName=}
echo "rd.iscsi.initiator=${initiator}"
return 0
;;
*) ;;
esac
done < ${initiator_conf}
return 1
}
# Figure out iBFT session according to session type
is_ibft() {
[[ "$(kdump_iscsi_get_rec_val "$1" "node.discovery_type")" == fw ]]
}
kdump_setup_iscsi_device() {
local path=$1
local tgt_name
local tgt_ipaddr
local username
local password
local userpwd_str
local username_in
local password_in
local userpwd_in_str
local netroot_str
local initiator_str
local netroot_conf="${initdir}/etc/cmdline.d/50iscsi.conf"
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
dinfo "Found iscsi component $1"
# Check once before getting explicit values, so we can bail out early,
# e.g. in case of pure-hardware(all-offload) iscsi.
if ! /sbin/iscsiadm -m session -r "$path" &> /dev/null; then
return 1
fi
if is_ibft "$path"; then
return
fi
# Remove software iscsi cmdline generated by 95iscsi,
# and let kdump regenerate here.
rm -f "${initdir}/etc/cmdline.d/95iscsi.conf"
tgt_name=$(kdump_iscsi_get_rec_val "$path" "node.name")
tgt_ipaddr=$(kdump_iscsi_get_rec_val "$path" "node.conn\[0\].address")
# get and set username and password details
username=$(kdump_iscsi_get_rec_val "$path" "node.session.auth.username")
[[ $username == "<empty>" ]] && username=""
password=$(kdump_iscsi_get_rec_val "$path" "node.session.auth.password")
[[ $password == "<empty>" ]] && password=""
username_in=$(kdump_iscsi_get_rec_val "$path" "node.session.auth.username_in")
[[ -n $username ]] && userpwd_str="$username:$password"
# get and set incoming username and password details
[[ $username_in == "<empty>" ]] && username_in=""
password_in=$(kdump_iscsi_get_rec_val "$path" "node.session.auth.password_in")
[[ $password_in == "<empty>" ]] && password_in=""
[[ -n $username_in ]] && userpwd_in_str=":$username_in:$password_in"
kdump_install_net "$tgt_ipaddr"
# prepare netroot= command line
# FIXME: Do we need to parse and set other parameters like protocol, port
# iscsi_iface_name, netdev_name, LUN etc.
if is_ipv6_address "$tgt_ipaddr"; then
tgt_ipaddr="[$tgt_ipaddr]"
fi
netroot_str="netroot=iscsi:${userpwd_str}${userpwd_in_str}@$tgt_ipaddr::::$tgt_name"
[[ -f $netroot_conf ]] || touch "$netroot_conf"
# If netroot target does not exist already, append.
if ! grep -q "$netroot_str" "$netroot_conf"; then
echo "$netroot_str" >> "$netroot_conf"
dinfo "Appended $netroot_str to $netroot_conf"
fi
# Setup initator
if ! initiator_str=$(kdump_get_iscsi_initiator); then
derror "Failed to get initiator name"
return 1
fi
# If initiator details do not exist already, append.
if ! grep -q "$initiator_str" "$netroot_conf"; then
echo "$initiator_str" >> "$netroot_conf"
dinfo "Appended $initiator_str to $netroot_conf"
fi
}
kdump_check_iscsi_targets() {
# If our prerequisites are not met, fail anyways.
type -P iscsistart > /dev/null || return 1
kdump_check_setup_iscsi() (
local _dev
_dev=$1
[[ -L /sys/dev/block/$_dev ]] || return
cd "$(readlink -f "/sys/dev/block/$_dev")" || return 1
until [[ -d sys || -d iscsi_session ]]; do
cd ..
done
[[ -d iscsi_session ]] && kdump_setup_iscsi_device "$PWD"
)
[[ $hostonly ]] || [[ $mount_needs ]] && {
for_each_host_dev_and_slaves_all kdump_check_setup_iscsi
}
}
# hostname -a is deprecated, do it by ourself
get_alias() {
local ips
local entries
local alias_set
ips=$(hostname -I)
for ip in $ips; do
# in /etc/hosts, alias can come at the 2nd column
if entries=$(grep "$ip" /etc/hosts | awk '{ $1=""; print $0 }'); then
alias_set="$alias_set $entries"
fi
done
echo "$alias_set"
}
is_localhost() {
local hostnames
local shortnames
local aliasname
local nodename=$1
hostnames=$(hostname -A)
shortnames=$(hostname -A -s)
aliasname=$(get_alias)
hostnames="$hostnames $shortnames $aliasname"
for name in ${hostnames}; do
if [[ $name == "$nodename" ]]; then
return 0
fi
done
return 1
}
# retrieves fence_kdump nodes from Pacemaker cluster configuration
get_pcs_fence_kdump_nodes() {
local nodes
pcs cluster sync > /dev/null 2>&1 && pcs cluster cib-upgrade > /dev/null 2>&1
# get cluster nodes from cluster cib, get interface and ip address
nodelist=$(pcs cluster cib | xmllint --xpath "/cib/status/node_state/@uname" -)
# nodelist is formed as 'uname="node1" uname="node2" ... uname="nodeX"'
# we need to convert each to node1, node2 ... nodeX in each iteration
for node in ${nodelist}; do
# convert $node from 'uname="nodeX"' to 'nodeX'
eval "$node"
nodename="$uname"
# Skip its own node name
if is_localhost "$nodename"; then
continue
fi
nodes="$nodes $nodename"
done
echo "$nodes"
}
# retrieves fence_kdump args from config file
get_pcs_fence_kdump_args() {
if [[ -f $FENCE_KDUMP_CONFIG_FILE ]]; then
. "$FENCE_KDUMP_CONFIG_FILE"
echo "$FENCE_KDUMP_OPTS"
fi
}
get_generic_fence_kdump_nodes() {
local filtered
local nodes
nodes=$(kdump_get_conf_val "fence_kdump_nodes")
for node in ${nodes}; do
# Skip its own node name
if is_localhost "$node"; then
continue
fi
filtered="$filtered $node"
done
echo "$filtered"
}
# setup fence_kdump in cluster
# setup proper network and install needed files
kdump_configure_fence_kdump() {
local kdump_cfg_file=$1
local nodes
local args
if is_generic_fence_kdump; then
nodes=$(get_generic_fence_kdump_nodes)
elif is_pcs_fence_kdump; then
nodes=$(get_pcs_fence_kdump_nodes)
# set appropriate options in kdump.conf
echo "fence_kdump_nodes $nodes" >> "${kdump_cfg_file}"
args=$(get_pcs_fence_kdump_args)
if [[ -n $args ]]; then
echo "fence_kdump_args $args" >> "${kdump_cfg_file}"
fi
else
# fence_kdump not configured
return 1
fi
# setup network for each node
for node in ${nodes}; do
kdump_install_net "$node"
done
dracut_install /etc/hosts
dracut_install /etc/nsswitch.conf
dracut_install "$FENCE_KDUMP_SEND"
}
# Install a random seed used to feed /dev/urandom
# By the time kdump service starts, /dev/uramdom is already fed by systemd
kdump_install_random_seed() {
local poolsize
poolsize=$(< /proc/sys/kernel/random/poolsize)
if [[ ! -d "${initdir}/var/lib/" ]]; then
mkdir -p "${initdir}/var/lib/"
fi
dd if=/dev/urandom of="${initdir}/var/lib/random-seed" \
bs="$poolsize" count=1 2> /dev/null
}
kdump_install_systemd_conf() {
# Kdump turns out to require longer default systemd mount timeout
# than 1st kernel(90s by default), we use default 300s for kdump.
if ! grep -q -r "^[[:space:]]*DefaultTimeoutStartSec=" "${initdir}/etc/systemd/system.conf"*; then
mkdir -p "${initdir}/etc/systemd/system.conf.d"
echo "[Manager]" > "${initdir}/etc/systemd/system.conf.d/kdump.conf"
echo "DefaultTimeoutStartSec=300s" >> "${initdir}/etc/systemd/system.conf.d/kdump.conf"
fi
# Forward logs to console directly, and don't read Kmsg, this avoids
# unneccessary memory consumption and make console output more useful.
# Only do so for non fadump image.
mkdir -p "${initdir}/etc/systemd/journald.conf.d"
echo "[Journal]" > "${initdir}/etc/systemd/journald.conf.d/kdump.conf"
echo "Storage=volatile" >> "${initdir}/etc/systemd/journald.conf.d/kdump.conf"
echo "ReadKMsg=no" >> "${initdir}/etc/systemd/journald.conf.d/kdump.conf"
echo "ForwardToConsole=yes" >> "${initdir}/etc/systemd/journald.conf.d/kdump.conf"
}
remove_cpu_online_rule() {
local file=${initdir}/usr/lib/udev/rules.d/40-redhat.rules
sed -i '/SUBSYSTEM=="cpu"/d' "$file"
}
install() {
local arch
kdump_module_init
kdump_install_conf
remove_sysctl_conf
# Onlining secondary cpus breaks kdump completely on KVM on Power hosts
# Though we use maxcpus=1 by default but 40-redhat.rules will bring up all
# possible cpus by default. (rhbz1270174 rhbz1266322)
# Thus before we get the kernel fix and the systemd rule fix let's remove
# the cpu online rule in kdump initramfs.
arch=$(uname -m)
if [[ "$arch" = "ppc64le" ]] || [[ "$arch" = "ppc64" ]]; then
remove_cpu_online_rule
fi
if is_ssh_dump_target; then
kdump_install_random_seed
fi
dracut_install -o /etc/adjtime /etc/localtime
inst "$moddir/monitor_dd_progress" "/kdumpscripts/monitor_dd_progress"
chmod +x "${initdir}/kdumpscripts/monitor_dd_progress"
inst "/bin/dd" "/bin/dd"
inst "/bin/tail" "/bin/tail"
inst "/bin/date" "/bin/date"
inst "/bin/sync" "/bin/sync"
inst "/bin/cut" "/bin/cut"
inst "/bin/head" "/bin/head"
inst "/bin/awk" "/bin/awk"
inst "/bin/sed" "/bin/sed"
inst "/bin/stat" "/bin/stat"
inst "/sbin/makedumpfile" "/sbin/makedumpfile"
inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg"
inst "/usr/bin/printf" "/sbin/printf"
inst "/usr/bin/logger" "/sbin/logger"
inst "/usr/bin/chmod" "/sbin/chmod"
inst "/lib/kdump/kdump-lib-initramfs.sh" "/lib/kdump-lib-initramfs.sh"
inst "/lib/kdump/kdump-logger.sh" "/lib/kdump-logger.sh"
inst "$moddir/kdump.sh" "/usr/bin/kdump.sh"
inst "$moddir/kdump-capture.service" "$systemdsystemunitdir/kdump-capture.service"
systemctl -q --root "$initdir" add-wants initrd.target kdump-capture.service
# Replace existing emergency service and emergency target
cp "$moddir/kdump-emergency.service" "$initdir/$systemdsystemunitdir/emergency.service"
cp "$moddir/kdump-emergency.target" "$initdir/$systemdsystemunitdir/emergency.target"
# Also redirect dracut-emergency to kdump error handler
ln_r "$systemdsystemunitdir/emergency.service" "$systemdsystemunitdir/dracut-emergency.service"
# Check for all the devices and if any device is iscsi, bring up iscsi
# target. Ideally all this should be pushed into dracut iscsi module
# at some point of time.
kdump_check_iscsi_targets
kdump_install_systemd_conf
# nfs/ssh dump will need to get host ip in second kernel and need to call 'ip' tool, see get_host_ip for more detail
if is_nfs_dump_target || is_ssh_dump_target; then
inst "ip"
fi
# For the lvm type target under kdump, in /etc/lvm/lvm.conf we can
# safely replace "reserved_memory=XXXX"(default value is 8192) with
# "reserved_memory=1024" to lower memory pressure under kdump. We do
# it unconditionally here, if "/etc/lvm/lvm.conf" doesn't exist, it
# actually does nothing.
sed -i -e \
's/\(^[[:space:]]*reserved_memory[[:space:]]*=\)[[:space:]]*[[:digit:]]*/\1 1024/' \
"${initdir}/etc/lvm/lvm.conf" &> /dev/null
# Save more memory by dropping switch root capability
dracut_no_switch_root
}