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149 lines
4.6 KiB
149 lines
4.6 KiB
#!/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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type getarg >/dev/null 2>&1 || . /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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# FIXME! |
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for f in $hookdir/cmdline/90*.sh; do |
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[ -f "$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 the default router if root server is |
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# unknown or not local, or if not available the root server. |
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# 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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# Get router IP if set |
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[ -n "$new_routers" ] && gw_ip=${new_routers%%,*} |
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[ -n "$gw" ] && gw_ip=$gw |
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# Get root server IP if set |
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if [ -n "$netroot" ]; then |
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dummy=${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]*) netroot_ip=$dummy;; |
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esac |
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fi |
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# Default arping dest to router |
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dest="$gw_ip" |
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# Change to arping root server if appropriate |
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if [ -n "$netroot_ip" ]; then |
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if [ -z "$dest" ]; then |
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# no gateway so check root server |
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dest="$netroot_ip" |
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else |
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r=$(ip route get "$netroot_ip") |
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if ! strstr "$r" ' via ' ; then |
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# local root server, so don't arping gateway |
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dest="$netroot_ip" |
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fi |
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fi |
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fi |
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if [ -n "$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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