d25b1ee31c
Each network interface is manged by a NM connection. Given a list of network interface names, copy the NetworkManager (NM) connection profiles i.e. .nmconnection files to the kdump initramfs. Before copying a connection file, clone it to automatically convert a legacy ifcfg-*[1] file to a .nmconnection file and for the convenience of editing the connection profile. [1] https://fedoraproject.org/wiki/Changes/NetworkManager_keyfile_instead_of_ifcfg_rh Signed-off-by: Coiby Xu <coxu@redhat.com> Reviewed-by: Thomas Haller <thaller@redhat.com> Reviewed-by: Philipp Rudo <prudo@redhat.com>
1181 lines
37 KiB
Bash
Executable File
1181 lines
37 KiB
Bash
Executable File
#!/bin/bash
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_DRACUT_KDUMP_NM_TMP_DIR="/tmp/$$-DRACUT_KDUMP_NM"
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cleanup() {
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rm -rf "$_DRACUT_KDUMP_NM_TMP_DIR"
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}
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# shellcheck disable=SC2154 # known issue of shellcheck https://github.com/koalaman/shellcheck/issues/1299
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trap 'ret=$?; cleanup; exit $ret;' EXIT
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kdump_module_init() {
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if ! [[ -d "${initdir}/tmp" ]]; then
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mkdir -p "${initdir}/tmp"
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fi
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mkdir -p "$_DRACUT_KDUMP_NM_TMP_DIR"
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. /lib/kdump/kdump-lib.sh
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}
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check() {
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[[ $debug ]] && set -x
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#kdumpctl sets this explicitly
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if [[ -z $IN_KDUMP ]] || [[ ! -f /etc/kdump.conf ]]; then
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return 1
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fi
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return 0
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}
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depends() {
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local _dep="base shutdown"
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kdump_module_init
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add_opt_module() {
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[[ " $omit_dracutmodules " != *\ $1\ * ]] && _dep="$_dep $1"
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}
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if is_squash_available; then
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add_opt_module squash
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else
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dwarning "Required modules to build a squashed kdump image is missing!"
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fi
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if is_wdt_active; then
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add_opt_module watchdog
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fi
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if is_ssh_dump_target; then
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_dep="$_dep ssh-client"
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fi
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if is_lvm2_thinp_dump_target; then
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if dracut --list-modules | grep -q lvmthinpool-monitor; then
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add_opt_module lvmthinpool-monitor
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else
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dwarning "Required lvmthinpool-monitor modules is missing! Please upgrade dracut >= 057."
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fi
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fi
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if [[ "$(uname -m)" == "s390x" ]]; then
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_dep="$_dep znet"
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fi
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if [[ -n "$(ls -A /sys/class/drm 2> /dev/null)" ]] || [[ -d /sys/module/hyperv_fb ]]; then
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add_opt_module drm
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fi
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if is_generic_fence_kdump || is_pcs_fence_kdump; then
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_dep="$_dep network"
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fi
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echo "$_dep"
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}
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kdump_is_bridge() {
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[[ -d /sys/class/net/"$1"/bridge ]]
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}
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kdump_is_bond() {
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[[ -d /sys/class/net/"$1"/bonding ]]
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}
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kdump_is_team() {
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[[ -f /usr/bin/teamnl ]] && teamnl "$1" ports &> /dev/null
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}
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kdump_is_vlan() {
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[[ -f /proc/net/vlan/"$1" ]]
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}
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# $1: netdev name
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source_ifcfg_file() {
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local ifcfg_file
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dwarning "Network Scripts are deprecated. You are encouraged to set up network by NetworkManager."
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ifcfg_file=$(get_ifcfg_filename "$1")
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if [[ -f ${ifcfg_file} ]]; then
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. "${ifcfg_file}"
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else
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dwarning "The ifcfg file of $1 is not found!"
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fi
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}
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kdump_setup_dns() {
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local _netdev="$1"
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local _conpath="$2"
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local _nameserver _dns _tmp array
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local _dnsfile=${initdir}/etc/cmdline.d/42dns.conf
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_tmp=$(get_nmcli_field_by_conpath "IP4.DNS" "$_conpath")
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# shellcheck disable=SC2206
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array=(${_tmp//|/ })
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if [[ ${array[*]} ]]; then
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for _dns in "${array[@]}"; do
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echo "nameserver=$_dns" >> "$_dnsfile"
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done
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else
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dwarning "Failed to get DNS info via nmcli output. Now try sourcing ifcfg script"
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source_ifcfg_file "$_netdev"
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[[ -n $DNS1 ]] && echo "nameserver=$DNS1" > "$_dnsfile"
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[[ -n $DNS2 ]] && echo "nameserver=$DNS2" >> "$_dnsfile"
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fi
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while read -r content; do
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_nameserver=$(echo "$content" | grep ^nameserver)
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[[ -z $_nameserver ]] && continue
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_dns=$(echo "$_nameserver" | awk '{print $2}')
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[[ -z $_dns ]] && continue
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if [[ ! -f $_dnsfile ]] || ! grep -q "$_dns" "$_dnsfile"; then
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echo "nameserver=$_dns" >> "$_dnsfile"
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fi
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done < "/etc/resolv.conf"
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}
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# $1: repeat times
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# $2: string to be repeated
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# $3: separator
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repeatedly_join_str() {
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local _count="$1"
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local _str="$2"
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local _separator="$3"
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local i _res
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if [[ $_count -le 0 ]]; then
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echo -n ""
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return
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fi
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i=0
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_res="$_str"
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((_count--))
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while [[ $i -lt $_count ]]; do
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((i++))
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_res="${_res}${_separator}${_str}"
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done
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echo -n "$_res"
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}
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# $1: prefix
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# $2: ipv6_flag="-6" indicates it's IPv6
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# Given a prefix, calculate the netmask (equivalent of "ipcalc -m")
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# by concatenating three parts,
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# 1) the groups with all bits set 1
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# 2) a group with partial bits set to 0
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# 3) the groups with all bits set to 0
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cal_netmask_by_prefix() {
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local _prefix="$1"
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local _ipv6_flag="$2" _ipv6
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local _bits_per_octet=8
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local _count _res _octets_per_group _octets_total _seperator _total_groups
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local _max_group_value _max_group_value_repr _bits_per_group _tmp _zero_bits
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if [[ $_ipv6_flag == "-6" ]]; then
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_ipv6=1
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else
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_ipv6=0
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fi
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if [[ $_prefix -lt 0 || $_prefix -gt 128 ]] \
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|| ( ((!_ipv6)) && [[ $_prefix -gt 32 ]]); then
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derror "Bad prefix:$_prefix for calculating netmask"
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exit 1
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fi
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if ((_ipv6)); then
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_octets_per_group=2
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_octets_total=16
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_seperator=":"
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else
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_octets_per_group=1
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_octets_total=4
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_seperator="."
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fi
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_total_groups=$((_octets_total / _octets_per_group))
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_bits_per_group=$((_octets_per_group * _bits_per_octet))
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_max_group_value=$(((1 << _bits_per_group) - 1))
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if ((_ipv6)); then
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_max_group_value_repr=$(printf "%x" $_max_group_value)
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else
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_max_group_value_repr="$_max_group_value"
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fi
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_count=$((_prefix / _octets_per_group / _bits_per_octet))
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_first_part=$(repeatedly_join_str "$_count" "$_max_group_value_repr" "$_seperator")
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_res="$_first_part"
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_tmp=$((_octets_total * _bits_per_octet - _prefix))
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_zero_bits=$((_tmp % _bits_per_group))
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if [[ $_zero_bits -ne 0 ]]; then
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_second_part=$((_max_group_value >> _zero_bits << _zero_bits))
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if ((_ipv6)); then
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_second_part=$(printf "%x" $_second_part)
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fi
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((_count++))
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if [[ -z $_first_part ]]; then
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_res="$_second_part"
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else
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_res="${_first_part}${_seperator}${_second_part}"
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fi
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fi
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_count=$((_total_groups - _count))
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if [[ $_count -eq 0 ]]; then
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echo -n "$_res"
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return
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fi
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if ((_ipv6)) && [[ $_count -gt 1 ]]; then
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# use condensed notion for IPv6
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_third_part=":"
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else
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_third_part=$(repeatedly_join_str "$_count" "0" "$_seperator")
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fi
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if [[ -z $_res ]] && ((!_ipv6)); then
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echo -n "${_third_part}"
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else
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echo -n "${_res}${_seperator}${_third_part}"
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fi
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}
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#$1: netdev name
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#$2: srcaddr
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#if it use static ip echo it, or echo null
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kdump_static_ip() {
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local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
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local _netmask _gateway _ipaddr _target _nexthop _prefix
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_ipaddr=$(ip addr show dev "$_netdev" permanent | awk "/ $_srcaddr\/.* /{print \$2}")
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if is_ipv6_address "$_srcaddr"; then
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_ipv6_flag="-6"
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fi
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if [[ -n $_ipaddr ]]; then
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_gateway=$(ip $_ipv6_flag route list dev "$_netdev" \
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| awk '/^default /{print $3}' | head -n 1)
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if [[ "x" != "x"$_ipv6_flag ]]; then
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# _ipaddr="2002::56ff:feb6:56d5/64", _netmask is the number after "/"
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_netmask=${_ipaddr#*\/}
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_srcaddr="[$_srcaddr]"
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_gateway="[$_gateway]"
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else
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_prefix=$(cut -d'/' -f2 <<< "$_ipaddr")
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if ! _netmask=$(cal_netmask_by_prefix "$_prefix" "$_ipv6_flag"); then
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derror "Failed to calculate netmask for $_ipaddr"
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exit 1
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fi
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fi
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echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
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fi
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/sbin/ip $_ipv6_flag route show | grep -v default \
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| grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" \
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| while read -r _route; do
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_target=$(echo "$_route" | awk '{print $1}')
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_nexthop=$(echo "$_route" | awk '{print $3}')
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if [[ "x" != "x"$_ipv6_flag ]]; then
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_target="[$_target]"
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_nexthop="[$_nexthop]"
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fi
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echo "rd.route=$_target:$_nexthop:$kdumpnic"
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done >> "${initdir}/etc/cmdline.d/45route-static.conf"
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kdump_handle_mulitpath_route "$_netdev" "$_srcaddr" "$kdumpnic"
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}
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kdump_handle_mulitpath_route() {
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local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
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local _target _nexthop _route _weight _max_weight _rule
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if is_ipv6_address "$_srcaddr"; then
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_ipv6_flag="-6"
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fi
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while IFS="" read -r _route; do
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if [[ $_route =~ [[:space:]]+nexthop ]]; then
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_route=${_route##[[:space:]]}
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# Parse multipath route, using previous _target
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[[ $_target == 'default' ]] && continue
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[[ $_route =~ .*via.*\ $_netdev ]] || continue
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_weight=$(echo "$_route" | cut -d ' ' -f7)
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if [[ $_weight -gt $_max_weight ]]; then
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_nexthop=$(echo "$_route" | cut -d ' ' -f3)
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_max_weight=$_weight
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if [[ "x" != "x"$_ipv6_flag ]]; then
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_rule="rd.route=[$_target]:[$_nexthop]:$kdumpnic"
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else
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_rule="rd.route=$_target:$_nexthop:$kdumpnic"
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fi
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fi
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else
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[[ -n $_rule ]] && echo "$_rule"
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_target=$(echo "$_route" | cut -d ' ' -f1)
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_rule="" _max_weight=0 _weight=0
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fi
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done >> "${initdir}/etc/cmdline.d/45route-static.conf" \
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<<< "$(/sbin/ip $_ipv6_flag route show)"
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[[ -n $_rule ]] && echo "$_rule" >> "${initdir}/etc/cmdline.d/45route-static.conf"
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}
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kdump_get_mac_addr() {
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cat "/sys/class/net/$1/address"
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}
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#Bonding or team master modifies the mac address
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#of its slaves, we should use perm address
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kdump_get_perm_addr() {
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local addr
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addr=$(ethtool -P "$1" | sed -e 's/Permanent address: //')
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if [[ -z $addr ]] || [[ $addr == "00:00:00:00:00:00" ]]; then
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derror "Can't get the permanent address of $1"
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else
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echo "$addr"
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fi
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}
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# Prefix kernel assigned names with "kdump-". EX: eth0 -> kdump-eth0
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# Because kernel assigned names are not persistent between 1st and 2nd
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# kernel. We could probably end up with eth0 being eth1, eth0 being
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# eth1, and naming conflict happens.
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kdump_setup_ifname() {
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local _ifname
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# If ifname already has 'kdump-' prefix, we must be switching from
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# fadump to kdump. Skip prefixing 'kdump-' in this case as adding
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# another prefix may truncate the ifname. Since an ifname with
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# 'kdump-' is already persistent, this should be fine.
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if [[ $1 =~ eth* ]] && [[ ! $1 =~ ^kdump-* ]]; then
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_ifname="kdump-$1"
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else
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_ifname="$1"
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fi
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echo "$_ifname"
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}
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_clone_nmconnection() {
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local _clone_output _name _unique_id
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_unique_id=$1
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_name=$(nmcli --get-values connection.id connection show "$_unique_id")
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if _clone_output=$(nmcli connection clone --temporary uuid "$_unique_id" "$_name"); then
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sed -E -n "s/.* \(.*\) cloned as.*\((.*)\)\.$/\1/p" <<< "$_clone_output"
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return 0
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fi
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return 1
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}
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# Clone and modify NM connection profiles
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#
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# This function makes use of "nmcli clone" to automatically convert ifcfg-*
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# files to Networkmanager .nmconnection connection profiles and also modify the
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# properties of .nmconnection if necessary.
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clone_and_modify_nmconnection() {
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local _dev _cloned_nmconnection_file_path _tmp_nmconnection_file_path _old_uuid _uuid
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_dev=$1
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_nmconnection_file_path=$2
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_old_uuid=$(nmcli --get-values connection.uuid connection show filename "$_nmconnection_file_path")
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if ! _uuid=$(_clone_nmconnection "$_old_uuid"); then
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derror "Failed to clone $_old_uuid"
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exit 1
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fi
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_cloned_nmconnection_file_path=$(nmcli --get-values UUID,FILENAME connection show | sed -n "s/^${_uuid}://p")
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_tmp_nmconnection_file_path=$_DRACUT_KDUMP_NM_TMP_DIR/$(basename "$_nmconnection_file_path")
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cp "$_cloned_nmconnection_file_path" "$_tmp_nmconnection_file_path"
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# change uuid back to old value in case it's refered by other connection
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# profile e.g. connection.master could be interface name of the master
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# device or UUID of the master connection.
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sed -i -E "s/(^uuid=).*$/\1${_old_uuid}/g" "$_tmp_nmconnection_file_path"
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nmcli connection del "$_uuid" &> >(ddebug)
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echo -n "$_tmp_nmconnection_file_path"
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}
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_install_nmconnection() {
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local _src _nmconnection_name _dst
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_src=$1
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_nmconnection_name=$(basename "$_src")
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_dst="/etc/NetworkManager/system-connections/$_nmconnection_name"
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inst "$_src" "$_dst"
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}
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kdump_install_nmconnections() {
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local _netif _nm_conn_path _cloned_nm_path
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while IFS=: read -r _netif _nm_conn_path; do
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[[ -v "unique_netifs[$_netif]" ]] || continue
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if _cloned_nm_path=$(clone_and_modify_nmconnection "$_netif" "$_nm_conn_path"); then
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_install_nmconnection "$_cloned_nm_path"
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else
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derror "Failed to install the .nmconnection for $_netif"
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exit 1
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fi
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done <<< "$(nmcli -t -f device,filename connection show --active)"
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}
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kdump_setup_bridge() {
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local _netdev=$1
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local _brif _dev _mac _kdumpdev
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for _dev in "/sys/class/net/$_netdev/brif/"*; do
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[[ -e $_dev ]] || continue
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_dev=${_dev##*/}
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_kdumpdev=$_dev
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if kdump_is_bond "$_dev"; then
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(kdump_setup_bond "$_dev" "$(get_nmcli_connection_apath_by_ifname "$_dev")") || exit 1
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elif kdump_is_team "$_dev"; then
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kdump_setup_team "$_dev"
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elif kdump_is_vlan "$_dev"; then
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kdump_setup_vlan "$_dev"
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else
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_mac=$(kdump_get_mac_addr "$_dev")
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_kdumpdev=$(kdump_setup_ifname "$_dev")
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echo -n " ifname=$_kdumpdev:$_mac" >> "${initdir}/etc/cmdline.d/41bridge.conf"
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fi
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_brif+="$_kdumpdev,"
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done
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echo " bridge=$_netdev:${_brif%,}" >> "${initdir}/etc/cmdline.d/41bridge.conf"
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}
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# drauct takes bond=<bondname>[:<bondslaves>:[:<options>]] syntax to parse
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# bond. For example:
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# bond=bond0:eth0,eth1:mode=balance-rr
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kdump_setup_bond() {
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local _netdev="$1"
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local _conpath="$2"
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local _dev _mac _slaves _kdumpdev _bondoptions
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for _dev in $(cat "/sys/class/net/$_netdev/bonding/slaves"); do
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_mac=$(kdump_get_perm_addr "$_dev")
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_kdumpdev=$(kdump_setup_ifname "$_dev")
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echo -n " ifname=$_kdumpdev:$_mac" >> "${initdir}/etc/cmdline.d/42bond.conf"
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_slaves+="$_kdumpdev,"
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done
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echo -n " bond=$_netdev:${_slaves%,}" >> "${initdir}/etc/cmdline.d/42bond.conf"
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|
|
_bondoptions=$(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" > "${initdir}/etc/cmdline.d/43vlan.conf"
|
|
elif kdump_is_team "$_phydev"; then
|
|
(kdump_setup_team "$_phydev") || exit 1
|
|
echo " vlan=$(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/$$-kdump.conf"
|
|
;;
|
|
ext[234] | xfs | btrfs | minix | virtiofs)
|
|
_pdev=$(kdump_get_persistent_dev "$_val")
|
|
sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#" "${initdir}/tmp/$$-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
|
|
|
|
if [[ -f $file ]]; then
|
|
sed -i '/SUBSYSTEM=="cpu"/d' "$file"
|
|
fi
|
|
}
|
|
|
|
install() {
|
|
declare -A unique_netifs
|
|
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
|
|
}
|