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kdump-lib.sh: rework nmcli related functions 

This fixes word splitting issue with nmcli args. Current kexec-tools
scripts won't call nmcli with correct arguments when there are space in
network interface name.

nmcli expects multiple parameters, but get_nmcli_value_by_field only
accepts two params and depends on shell word splitting to split the
_nm_show_cmd into multiple params, which is very fragile.
So switch the param order, simplified this function and now multiple
params can be used properly.

And get_nmcli_connection_show_cmd_by_ifname returns multiple
nmcli params in a single variable, it depend on shell word splitting to
split the words when calling nmcli. But this is very fragile and break
easily when there are any special character in the connection path.

This function is only introduced to get and cache the nmcli command
which contains the "connection name".

Actually only cache the "connection path" is enough. Callers should
just call get_nmcli_connection_apath_by_ifname to cache the path, and
a new helper get_nmcli_field_by_conpath is introduced here to get value
from nmcli. This way "connection path" can contain any character.

Also get rid of another nmcli_cmd usage in
get_nmcli_connection_apath_by_ifname which stores multiple params in a
single bash variable separated by space.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
This commit is contained in:
Kairui Song 2021-09-08 15:20:42 +08:00
parent 30090f3a15
commit 58d3e6db3a
2 changed files with 28 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
dracut-module-setup.sh
View File

@ -84,14 +84,13 @@ source_ifcfg_file() {
fi
}
# $1: nmcli connection show output
kdump_setup_dns() {
local _netdev="$1"
local _nm_show_cmd="$2"
local _conpath="$2"
local _nameserver _dns _tmp array
local _dnsfile=${initdir}/etc/cmdline.d/42dns.conf
_tmp=$(get_nmcli_value_by_field "$_nm_show_cmd" "IP4.DNS")
_tmp=$(get_nmcli_field_by_conpath "IP4.DNS" "$_conpath")
# shellcheck disable=SC2206
array=(${_tmp//|/ })
if [[ ${array[*]} ]]; then
@ -355,7 +354,7 @@ kdump_setup_bridge() {
_dev=${_dev##*/}
_kdumpdev=$_dev
if kdump_is_bond "$_dev"; then
(kdump_setup_bond "$_dev" "$(get_nmcli_connection_show_cmd_by_ifname "$_dev")") || exit 1
(kdump_setup_bond "$_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
@ -375,7 +374,7 @@ kdump_setup_bridge() {
# bond=bond0:eth0,eth1:mode=balance-rr
kdump_setup_bond() {
local _netdev="$1"
local _nm_show_cmd="$2"
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")
@ -385,7 +384,7 @@ kdump_setup_bond() {
done
echo -n " bond=$_netdev:${_slaves%,}" >> "${initdir}/etc/cmdline.d/42bond.conf"
_bondoptions=$(get_nmcli_value_by_field "$_nm_show_cmd" "bond.options")
_bondoptions=$(get_nmcli_field_by_conpath "bond.options" "$_conpath")
if [[ -z $_bondoptions ]]; then
dwarning "Failed to get bond configuration via nmlci output. Now try sourcing ifcfg script."
@ -436,7 +435,7 @@ kdump_setup_vlan() {
derror "Vlan over bridge is not supported!"
exit 1
elif kdump_is_bond "$_phydev"; then
(kdump_setup_bond "$_phydev" "$(get_nmcli_connection_show_cmd_by_ifname "$_phydev")") || exit 1
(kdump_setup_bond "$_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")"
@ -474,18 +473,18 @@ find_online_znet_device() {
# setup s390 znet cmdline
# $1: netdev (ifname)
# $2: nmcli connection show output
# $2: nmcli connection path
kdump_setup_znet() {
local _netdev="$1"
local _nmcli_cmd="$2"
local _conpath="$2"
local s390_prefix="802-3-ethernet.s390-"
local _options=""
local NETTYPE
local SUBCHANNELS
NETTYPE=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}nettype")
SUBCHANNELS=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}subchannels")
_options=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}options")
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."
@ -532,22 +531,22 @@ kdump_get_remote_ip() {
# initramfs accessing giving destination
# $1: destination host
kdump_install_net() {
local _destaddr _srcaddr _route _netdev _nm_show_cmd kdumpnic
local _destaddr _srcaddr _route _netdev _conpath kdumpnic
local _static _proto _ip_conf _ip_opts _ifname_opts
local _znet_netdev _nm_show_cmd_znet
local _znet_netdev _znet_conpath
_destaddr=$(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 "$_route" "dev")
_nm_show_cmd=$(get_nmcli_connection_show_cmd_by_ifname "$_netdev")
_conpath=$(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 $_znet_netdev ]]; then
_nm_show_cmd_znet=$(get_nmcli_connection_show_cmd_by_ifname "$_znet_netdev")
if ! (kdump_setup_znet "$_znet_netdev" "$_nm_show_cmd_znet"); then
_znet_conpath=$(get_nmcli_connection_apath_by_ifname "$_znet_netdev")
if ! (kdump_setup_znet "$_znet_netdev" "$_znet_conpath"); then
derror "Failed to set up znet"
exit 1
fi
@ -577,7 +576,7 @@ kdump_install_net() {
if kdump_is_bridge "$_netdev"; then
kdump_setup_bridge "$_netdev"
elif kdump_is_bond "$_netdev"; then
(kdump_setup_bond "$_netdev" "$_nm_show_cmd") || exit 1
(kdump_setup_bond "$_netdev" "$_conpath") || exit 1
elif kdump_is_team "$_netdev"; then
kdump_setup_team "$_netdev"
elif kdump_is_vlan "$_netdev"; then
@ -587,7 +586,7 @@ kdump_install_net() {
echo "$_ifname_opts" >> "$_ip_conf"
fi
kdump_setup_dns "$_netdev" "$_nm_show_cmd"
kdump_setup_dns "$_netdev" "$_conpath"
if [[ ! -f ${initdir}/etc/cmdline.d/50neednet.conf ]]; then
# network-manager module needs this parameter

32
kdump-lib.sh
View File

@ -275,6 +275,7 @@ get_hwaddr()
# 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
@ -285,12 +286,16 @@ get_hwaddr()
# bond.options "mode=balance-rr"
get_nmcli_value_by_field()
{
local _nm_show_cmd=$1
local _field=$2
LANG=C nmcli --get-values "$@"
}
local val=$(LANG=C nmcli --get-values $_field $_nm_show_cmd)
# 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=$2
echo -n "$val"
get_nmcli_value_by_field "$_field" connection show "$_apath"
}
# Get nmcli connection apath (a D-Bus active connection path ) by ifname
@ -300,25 +305,8 @@ get_nmcli_value_by_field()
get_nmcli_connection_apath_by_ifname()
{
local _ifname=$1
local _nm_show_cmd="device show $_ifname"
local _apath=$(get_nmcli_value_by_field "$_nm_show_cmd" "GENERAL.CON-PATH")
echo -n "$_apath"
}
# Get nmcli connection show cmd by ifname
#
# "$_apath" is supposed to not contain any chracter that
# need to be escapded, e.g. space. Otherwise get_nmcli_value_by_field
# would fail.
get_nmcli_connection_show_cmd_by_ifname()
{
local _ifname="$1"
local _apath=$(get_nmcli_connection_apath_by_ifname "$_ifname")
local _nm_show_cmd="connection show $_apath"
echo -n "$_nm_show_cmd"
get_nmcli_value_by_field "GENERAL.CON-PATH" device show "$_ifname"
}
get_ifcfg_by_device()