Current File : //lib/dracut/modules.d/40network/ifup.sh
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
#
# We don't need to check for ip= errors here, that is handled by the
# cmdline parser script
#
# without $2 means this is for real netroot case
# or it is for manually bring up network ie. for kdump scp vmcore
PATH=/usr/sbin:/usr/bin:/sbin:/bin
type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
type ip_to_var >/dev/null 2>&1 || . /lib/net-lib.sh
# Huh? No $1?
[ -z "$1" ] && exit 1
# $netif reads easier than $1
netif=$1
# loopback is always handled the same way
if [ "$netif" = "lo" ] ; then
ip link set lo up
ip addr add 127.0.0.1/8 dev lo
exit 0
fi
# Run dhclient
do_dhcp() {
# dhclient-script will mark the netif up and generate the online
# event for nfsroot
# XXX add -V vendor class and option parsing per kernel
local _COUNT=0
local _timeout=$(getargs rd.net.timeout.dhcp=)
local _DHCPRETRY=$(getargs rd.net.dhcp.retry=)
_DHCPRETRY=${_DHCPRETRY:-1}
[ -e /tmp/dhclient.$netif.pid ] && return 0
if ! iface_has_carrier $netif; then
warn "No carrier detected on interface $netif"
return 1
fi
[ -n "$macaddr" ] && ip link set address $macaddr dev $netif
[ -n "$mtu" ] && ip link set mtu $mtu dev $netif
ip -4 addr flush dev $netif
while [ $_COUNT -lt $_DHCPRETRY ]; do
info "Starting dhcp for interface $netif"
dhclient "$@" \
${_timeout:+-timeout $_timeout} \
-q \
-cf /etc/dhclient.conf \
-pf /tmp/dhclient.$netif.pid \
-lf /tmp/dhclient.$netif.lease \
$netif \
&& return 0
_COUNT=$(($_COUNT+1))
[ $_COUNT -lt $_DHCPRETRY ] && sleep 1
done
warn "dhcp for interface $netif failed"
return 1
}
load_ipv6() {
[ -d /proc/sys/net/ipv6 ] && return
modprobe ipv6
i=0
while [ ! -d /proc/sys/net/ipv6 ]; do
i=$(($i+1))
[ $i -gt 10 ] && break
sleep 0.1
done
}
do_ipv6auto() {
local ret
load_ipv6
echo 0 > /proc/sys/net/ipv6/conf/$netif/forwarding
echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_ra
echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_redirects
linkup $netif
[ -n "$macaddr" ] && ip link set address $macaddr dev $netif
[ -n "$mtu" ] && ip link set mtu $mtu dev $netif
wait_for_ipv6_auto $netif
ret=$?
[ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
return $ret
}
# Handle static ip configuration
do_static() {
strstr $ip '*:*:*' && load_ipv6
if [ -z "$dev" ] && ! iface_has_carrier "$netif"; then
warn "No carrier detected on interface $netif"
return 1
elif ! linkup "$netif"; then
warn "Could not bring interface $netif up!"
return 1
fi
ip route get "$ip" | {
read a rest
if [ "$a" = "local" ]; then
warn "Not assigning $ip to interface $netif, cause it is already assigned!"
return 1
fi
return 0
} || return 1
[ -n "$macaddr" ] && ip link set address $macaddr dev $netif
[ -n "$mtu" ] && ip link set mtu $mtu dev $netif
if strstr $ip '*:*:*'; then
# note no ip addr flush for ipv6
ip addr add $ip/$mask ${srv:+peer $srv} dev $netif
wait_for_ipv6_dad $netif
else
if [ -z "$srv" ]; then
if ! arping -f -q -D -c 2 -I $netif $ip; then
warn "Duplicate address detected for $ip for interface $netif."
return 1
fi
fi
ip -4 addr flush dev $netif
ip addr add $ip/$mask ${srv:+peer $srv} brd + dev $netif
fi
[ -n "$gw" ] && echo ip route replace default via $gw dev $netif > /tmp/net.$netif.gw
[ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
return 0
}
get_vid() {
case "$1" in
vlan*)
echo ${1#vlan}
;;
*.*)
echo ${1##*.}
;;
esac
}
# check, if we need VLAN's for this interface
if [ -z "$DO_VLAN_PHY" ] && [ -e /tmp/vlan.${netif}.phy ]; then
unset DO_VLAN
NO_AUTO_DHCP=yes DO_VLAN_PHY=yes ifup "$netif"
modprobe -b -q 8021q
for i in /tmp/vlan.*.${netif}; do
[ -e "$i" ] || continue
read vlanname < "$i"
if [ -n "$vlanname" ]; then
linkup "$netif"
ip link add dev "$vlanname" link "$netif" type vlan id "$(get_vid $vlanname)"
ifup "$vlanname"
fi
done
exit 0
fi
# Check, if interface is VLAN interface
if ! [ -e /tmp/vlan.${netif}.phy ]; then
for i in /tmp/vlan.${netif}.*; do
[ -e "$i" ] || continue
export DO_VLAN=yes
break
done
fi
# bridge this interface?
if [ -z "$NO_BRIDGE_MASTER" ]; then
for i in /tmp/bridge.*.info; do
[ -e "$i" ] || continue
unset bridgeslaves
unset bridgename
. "$i"
for ethname in $bridgeslaves ; do
[ "$netif" != "$ethname" ] && continue
NO_BRIDGE_MASTER=yes NO_AUTO_DHCP=yes ifup $ethname
linkup $ethname
if [ ! -e /tmp/bridge.$bridgename.up ]; then
ip link add name $bridgename type bridge
echo 0 > /sys/devices/virtual/net/$bridgename/bridge/forward_delay
> /tmp/bridge.$bridgename.up
fi
ip link set dev $ethname master $bridgename
ifup $bridgename
exit 0
done
done
fi
# enslave this interface to bond?
if [ -z "$NO_BOND_MASTER" ]; then
for i in /tmp/bond.*.info; do
[ -e "$i" ] || continue
unset bondslaves
unset bondname
. "$i"
for slave in $bondslaves ; do
[ "$netif" != "$slave" ] && continue
# already setup
[ -e /tmp/bond.$bondname.up ] && exit 0
# wait for all slaves to show up
for slave in $bondslaves ; do
# try to create the slave (maybe vlan or bridge)
NO_BOND_MASTER=yes NO_AUTO_DHCP=yes ifup $slave
if ! ip link show dev $slave >/dev/null 2>&1; then
# wait for the last slave to show up
exit 0
fi
done
modprobe -q -b bonding
echo "+$bondname" > /sys/class/net/bonding_masters 2>/dev/null
ip link set $bondname down
# Stolen from ifup-eth
# add the bits to setup driver parameters here
for arg in $bondoptions ; do
key=${arg%%=*};
value=${arg##*=};
# %{value:0:1} is replaced with non-bash specific construct
if [ "${key}" = "arp_ip_target" -a "${#value}" != "0" -a "+${value%%+*}" != "+" ]; then
OLDIFS=$IFS;
IFS=',';
for arp_ip in $value; do
echo +$arp_ip > /sys/class/net/${bondname}/bonding/$key
done
IFS=$OLDIFS;
else
echo $value > /sys/class/net/${bondname}/bonding/$key
fi
done
linkup $bondname
for slave in $bondslaves ; do
cat /sys/class/net/$slave/address > /tmp/net.${bondname}.${slave}.hwaddr
ip link set $slave down
echo "+$slave" > /sys/class/net/$bondname/bonding/slaves
linkup $slave
done
# Set mtu on bond master
[ -n "$bondmtu" ] && ip link set mtu $bondmtu dev $bondname
# add the bits to setup the needed post enslavement parameters
for arg in $bondoptions ; do
key=${arg%%=*};
value=${arg##*=};
if [ "${key}" = "primary" ]; then
echo $value > /sys/class/net/${bondname}/bonding/$key
fi
done
> /tmp/bond.$bondname.up
NO_BOND_MASTER=yes ifup $bondname
exit $?
done
done
fi
if [ -z "$NO_TEAM_MASTER" ]; then
for i in /tmp/team.*.info; do
[ -e "$i" ] || continue
unset teammaster
unset teamslaves
. "$i"
for slave in $teamslaves ; do
[ "$netif" != "$slave" ] && continue
[ -e /tmp/team.$teammaster.up ] && exit 0
# wait for all slaves to show up
for slave in $teamslaves ; do
# try to create the slave (maybe vlan or bridge)
NO_TEAM_MASTER=yes NO_AUTO_DHCP=yes ifup $slave
if ! ip link show dev $slave >/dev/null 2>&1; then
# wait for the last slave to show up
exit 0
fi
done
if [ ! -e /tmp/team.$teammaster.up ] ; then
# We shall only bring up those _can_ come up
# in case of some slave is gone in active-backup mode
working_slaves=""
for slave in $teamslaves ; do
ip link set $slave up 2>/dev/null
if wait_for_if_up $slave; then
working_slaves="$working_slaves$slave "
fi
done
# Do not add slaves now
teamd -d -U -n -N -t $teammaster -f /etc/teamd/$teammaster.conf
for slave in $working_slaves; do
# team requires the slaves to be down before joining team
ip link set $slave down
teamdctl $teammaster port add $slave
done
ip link set $teammaster up
> /tmp/team.$teammaster.up
NO_TEAM_MASTER=yes ifup $teammaster
exit $?
fi
done
done
fi
# all synthetic interfaces done.. now check if the interface is available
if ! ip link show dev $netif >/dev/null 2>&1; then
exit 1
fi
# disable manual ifup while netroot is set for simplifying our logic
# in netroot case we prefer netroot to bringup $netif automaticlly
[ -n "$2" -a "$2" = "-m" ] && [ -z "$netroot" ] && manualup="$2"
if [ -n "$manualup" ]; then
>/tmp/net.$netif.manualup
rm -f /tmp/net.${netif}.did-setup
else
[ -e /tmp/net.${netif}.did-setup ] && exit 0
[ -z "$DO_VLAN" ] && \
[ -e /sys/class/net/$netif/address ] && \
[ -e /tmp/net.$(cat /sys/class/net/$netif/address).did-setup ] && exit 0
fi
# No ip lines default to dhcp
ip=$(getarg ip)
if [ -z "$NO_AUTO_DHCP" ] && [ -z "$ip" ]; then
if [ "$netroot" = "dhcp6" ]; then
do_dhcp -6
else
do_dhcp -4
fi
for s in $(getargs nameserver); do
[ -n "$s" ] || continue
echo nameserver $s >> /tmp/net.$netif.resolv.conf
done
fi
# Specific configuration, spin through the kernel command line
# looking for ip= lines
for p in $(getargs ip=); do
ip_to_var $p
# skip ibft
[ "$autoconf" = "ibft" ] && continue
case "$dev" in
??:??:??:??:??:??) # MAC address
_dev=$(iface_for_mac $dev)
[ -n "$_dev" ] && dev="$_dev"
;;
??-??-??-??-??-??) # MAC address in BOOTIF form
_dev=$(iface_for_mac $(fix_bootif $dev))
[ -n "$_dev" ] && dev="$_dev"
;;
esac
# If this option isn't directed at our interface, skip it
if [ -n "$dev" ]; then
[ "$dev" != "$netif" ] && \
[ "$use_bridge" != 'true' ] && \
[ "$use_vlan" != 'true' ] && continue
else
iface_is_enslaved "$netif" && continue
fi
# Store config for later use
for i in ip srv gw mask hostname macaddr mtu dns1 dns2; do
eval '[ "$'$i'" ] && echo '$i'="$'$i'"'
done > /tmp/net.$netif.override
for autoopt in $(str_replace "$autoconf" "," " "); do
case $autoopt in
dhcp|on|any)
do_dhcp -4 ;;
dhcp6)
load_ipv6
do_dhcp -6 ;;
auto6)
do_ipv6auto ;;
either6)
do_ipv6auto || do_dhcp -6 ;;
*)
do_static ;;
esac
done
ret=$?
# setup nameserver
for s in "$dns1" "$dns2" $(getargs nameserver); do
[ -n "$s" ] || continue
echo nameserver $s >> /tmp/net.$netif.resolv.conf
done
if [ $ret -eq 0 ]; then
> /tmp/net.${netif}.up
if [ -z "$DO_VLAN" ] && [ -e /sys/class/net/${netif}/address ]; then
> /tmp/net.$(cat /sys/class/net/${netif}/address).up
fi
case $autoconf in
dhcp|on|any|dhcp6)
;;
*)
if [ $ret -eq 0 ]; then
setup_net $netif
source_hook initqueue/online $netif
if [ -z "$manualup" ]; then
/sbin/netroot $netif
fi
fi
;;
esac
exit $ret
fi
done
# netif isn't the top stack? Then we should exit here.
# eg. netif is bond0. br0 is on top of it. dhcp br0 is correct but dhcp
# bond0 doesn't make sense.
if [ -n "$DO_BOND_SETUP" -o -n "$DO_TEAM_SETUP" -o -n "$DO_VLAN_SETUP" ]; then
exit 0
fi
# no ip option directed at our interface?
if [ -z "$NO_AUTO_DHCP" ] && [ ! -e /tmp/net.${netif}.up ]; then
if [ -e /tmp/net.bootdev ]; then
BOOTDEV=$(cat /tmp/net.bootdev)
if [ "$netif" = "$BOOTDEV" ] || [ "$BOOTDEV" = "$(cat /sys/class/net/${netif}/address)" ]; then
load_ipv6
do_dhcp
fi
else
if getargs 'ip=dhcp6'; then
load_ipv6
do_dhcp -6
fi
if getargs 'ip=dhcp'; then
do_dhcp -4
fi
fi
fi
exit 0
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