130 lines
4.1 KiB
Bash
Executable File
130 lines
4.1 KiB
Bash
Executable File
#!/bin/sh
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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# ex: ts=8 sw=4 sts=4 et filetype=sh
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PATH=$PATH:/sbin:/usr/sbin
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. /lib/dracut-lib.sh
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# Huh? Empty $1?
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[ -z "$1" ] && exit 1
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# Huh? No interface config?
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[ ! -e /tmp/net.$1.up ] && exit 1
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# There's no sense in doing something if no (net)root info is available
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# or root is already there
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[ -e /tmp/root.info ] || exit 1
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. /tmp/root.info
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[ -d $NEWROOT/proc ] && exit 0
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[ -z "$netroot" ] && exit 1
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# Let's see if we have to wait for other interfaces
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# Note: exit works just fine, since the last interface to be
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# online'd should see all files
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[ -e "/tmp/net.ifaces" ] && read IFACES < /tmp/net.ifaces
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for iface in $IFACES ; do
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[ -e /tmp/net.$iface.up ] || exit 1
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done
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# Set or override primary interface
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netif=$1
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[ -e "/tmp/net.bootdev" ] && read netif < /tmp/net.bootdev
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# Figure out the handler for root=dhcp by recalling all netroot cmdline
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# handlers
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if [ "$netroot" = "dhcp" ] || [ "$netroot" = "dhcp6" ] ; then
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# Unset root so we can check later
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unset root
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# Load dhcp options
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[ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
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# If we have a specific bootdev with no dhcpoptions or empty root-path,
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# we die. Otherwise we just warn
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if [ -z "$new_root_path" ] ; then
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[ -n "$BOOTDEV" ] && die "No dhcp root-path received for '$BOOTDEV'"
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warn "No dhcp root-path received for '$BOOTDEV' trying other interfaces if available"
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exit 1
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fi
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# Set netroot to new_root_path, so cmdline parsers don't call
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netroot=$new_root_path
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for f in ./cmdline/90*.sh; do
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[ -f "$f" ] && . "$f";
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done
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else
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rootok="1"
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fi
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# Check: do we really know how to handle (net)root?
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[ -z "$root" ] && die "No or empty root= argument"
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[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
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handler=${netroot%%:*}
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handler=${handler%%4}
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handler="/sbin/${handler}root"
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if [ -z "$netroot" ] || [ ! -e "$handler" ] ; then
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die "No handler for netroot type '$netroot'"
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fi
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# We're here, so we can assume that upping interfaces is now ok
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[ -z "$IFACES" ] && IFACES="$netif"
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for iface in $IFACES ; do
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. /tmp/net.$iface.up
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done
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[ -e /tmp/net.$netif.gw ] && . /tmp/net.$netif.gw
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[ -e /tmp/net.$netif.hostname ] && . /tmp/net.$netif.hostname
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[ -e /tmp/net.$netif.resolv.conf ] && cp -f /tmp/net.$netif.resolv.conf /etc/resolv.conf
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# Load interface options
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[ -e /tmp/net.$netif.override ] && . /tmp/net.$netif.override
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[ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
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# Handle STP Timeout: arping default router or if not available the
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# root server. Note: This assumes that if no router is present the
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# root server is on the same subnet.
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#
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# TODO There's some netroot variants that don't (yet) have their
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# server-ip netroot
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[ -n "$new_routers" ] && dest=${new_routers%%,*}
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[ -n "$gw" ] && dest=$gw
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if [ -z "$dest" ] ; then
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dummy=${netroot#*:}
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dummy=${dummy%%:*}
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case "$dummy" in
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[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*) dest=$dummy;;
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esac
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fi
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if [ -n "$dest" ] && ! arping -q -f -w 60 -I $netif $dest ; then
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die "Resolving $dest via ARP on $netif failed"
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fi
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# Source netroot hooks before we start the handler
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source_all netroot
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# Run the handler; don't store the root, it may change from device to device
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# XXX other variables to export?
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if $handler $netif $netroot $NEWROOT; then
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# Network rootfs mount successful
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for iface in $IFACES ; do
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[ -f /tmp/dhclient.$iface.lease ] && cp /tmp/dhclient.$iface.lease /tmp/net.$iface.lease
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[ -f /tmp/dhclient.$iface.dhcpopts ] && cp /tmp/dhclient.$iface.dhcpopts /tmp/net.$iface.dhcpopts
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done
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# Save used netif for later use
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[ ! -f /tmp/net.ifaces ] && echo $netif > /tmp/net.ifaces
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else
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warn "Mounting root via '$netif' failed"
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# If we're trying with multiple interfaces, put that one down.
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# ip down/flush ensures that routeing info goes away as well
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if [ -z "$BOOTDEV" ] ; then
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ip link set $netif down
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ip addr flush dev $netif
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echo "#empty" > /etc/resolv.conf
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fi
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fi
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exit 0
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