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#!/bin/sh
PATH=$PATH:/sbin:/usr/sbin
. /lib/dracut-lib.sh
if getarg rdnetdebug ; then
exec >/tmp/netroot.$1.$$.out
exec 2>>/tmp/netroot.$1.$$.out
set -x
fi
# Huh? Empty $1?
[ -z "$1" ] && exit 1
# Huh? No interface config?
[ ! -e /tmp/net.$1.up ] && exit 1
# Only try to configure from one network interface at a time
#
if [ -z "$NETROOT_LOCKED" ] ; then
NETROOT_LOCKED=true
export NETROOT_LOCKED
exec flock -xo /tmp/netroot.lock -c "$0 $*"
exit 1
fi
# There's no sense in doing something if no (net)root info is available
# or root is already there
[ -e /tmp/root.info ] || exit 1
. /tmp/root.info
[ -d $NEWROOT/proc ] && exit 0
[ -z "$netroot" ] && exit 1
# Let's see if we have to wait for other interfaces
# Note: exit works just fine, since the last interface to be
# online'd should see all files
[ -e "/tmp/net.ifaces" ] && read IFACES < /tmp/net.ifaces
for iface in $IFACES ; do
[ -e /tmp/net.$iface.up ] || exit 1
done
# Set or override primary interface
netif=$1
[ -e "/tmp/net.bootdev" ] && read netif < /tmp/net.bootdev
# Figure out the handler for root=dhcp by recalling all netroot cmdline
# handlers
if [ "$netroot" = "dhcp" ] ; then
# Unset root so we can check later
unset root
# Load dhcp options
[ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
# If we have a specific bootdev with no dhcpoptions or empty root-path,
# we die. Otherwise we just warn
if [ -z "$new_root_path" ] ; then
[ -n "$BOOTDEV" ] && die "No dhcp root-path received for '$BOOTDEV'"
warn "No dhcp root-path received for '$BOOTDEV' trying other interfaces if available"
exit 1
fi
# Set netroot to new_root_path, so cmdline parsers don't call
netroot=$new_root_path
for f in ./cmdline/90*.sh; do
[ -f "$f" ] && . "$f";
done
else
rootok="1"
fi
# Check: do we really know how to handle (net)root?
[ -z "$root" ] && die "No or empty root= argument"
[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
handler=${netroot%%:*}
handler=${handler%%4}
handler="/sbin/${handler}root"
if [ -z "$netroot" ] || [ ! -e "$handler" ] ; then
die "No handler for netroot type '$netroot'"
fi
# We're here, so we can assume that upping interfaces is now ok
[ -z "$IFACES" ] && IFACES="$netif"
for iface in $IFACES ; do
. /tmp/net.$iface.up
done
[ -e /tmp/net.$netif.gw ] && . /tmp/net.$netif.gw
[ -e /tmp/net.$netif.hostname ] && . /tmp/net.$netif.hostname
[ -e /tmp/resolv.conf ] && cp -f /tmp/resolv.conf /etc/resolv.conf
# Source netroot hooks before we start the handler
source_all netroot
# Run the handler; don't store the root, it may change from device to device
# XXX other variables to export?
if $handler $netif $netroot $NEWROOT; then
# Network rootfs mount successful
for iface in $IFACES ; do
[ -f /tmp/dhclient.$iface.lease ] && cp /tmp/dhclient.$iface.lease /tmp/net.$iface.lease
[ -f /tmp/dhclient.$iface.dhcpopts ] && cp /tmp/dhclient.$iface.dhcpopts /tmp/net.$iface.dhcpopts
done
# Save used netif for later use
[ ! -f /tmp/net.ifaces ] && echo $netif > /tmp/net.ifaces
else
warn "Mounting root via '$netif' failed"
# If we're trying with multiple interfaces, put that one down.
# ip down/flush ensures that routeing info goes away as well
if [ -z "$BOOTDEV" ] ; then
ip link set $netif down
ip addr flush dev $netif
echo "#empty" > /etc/resolv.conf
fi
fi
exit 0