add failsafe mode and mini_fo mounting support for brcm-2.4 and brcm-2.6

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5544 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 66 insertions, 6 deletions

diff --git a/package/base-files/brcm/etc/preinit b/package/base-files/brcm/etc/preinit
index fb13e107e..9c7f9448c 100755
--- a/package/base-files/brcm/etc/preinit
+++ b/package/base-files/brcm/etc/preinit
@@ -1,13 +1,73 @@
 #!/bin/sh
 # Copyright (C) 2006 OpenWrt.org
 
-export PATH=/bin:/sbin:/usr/bin:/usr/sbin
-mount none /proc -t proc
+. /etc/functions.sh
+. /etc/diag.sh
+
+failsafe() {
+	lock /tmp/.failsafe
 
-[ -f /etc/preinit.arch ] && . /etc/preinit.arch
-[ -z "$FAILSAFE" ] || {
-	echo /bin/true > /proc/sys/kernel/hotplug
+	echo "0 1 2 3 4 5u*" > /proc/switch/eth0/vlan/0/ports
+	
+	set_state failsafe
+	[ -x "/usr/sbin/nvram" ] && {
+		[ "$(nvram get boot_wait)" != "on" ] && {
+			nvram set boot_wait=on
+			nvram commit
+		}
+	}
+
+	netmsg 192.168.1.255 "Entering Failsafe!"
 	telnetd -l /bin/login <> /dev/null 2>&1
+
+	ash --login
+	lock -u /tmp/.failsafe
 }
-mount_root ${FAILSAFE:+failsafe}
+
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+mount none /proc -t proc
+size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
+mount none /tmp -t tmpfs -o size=$size
+
+insmod diag
+set_state preinit
+trap 'FAILSAFE=true' USR1
+echo '/sbin/hotplug.failsafe' > /proc/sys/kernel/hotplug
+
+ifname=eth0
+
+# hardware specific overrides
+case "$(cat /proc/diag/model)" in
+	"Linksys WAP54G V1") ifname=eth1;;
+	"ASUS WL-HDD") ifname=eth1;;
+	"ASUS WL-300g") ifname=eth1;;
+	"ASUS (unknown, BCM4702)") ifname=eth1;;
+esac
+
+insmod switch-core
+insmod switch-robo || insmod switch-adm || rmmod switch-core
+
+ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
+
+[ -d /proc/switch/eth0 ] && {
+	echo 1 > /proc/switch/eth0/reset
+
+	# this would be easier if we blasted the message across all ports
+	# but we don't want packets leaking across interfaces
+	for port in $(seq 0 4); do {
+		echo "$port 5u*" > /proc/switch/eth0/vlan/0/ports
+		netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
+	}; done
+} || netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
+
+sleep 2
+
+eval ${FAILSAFE:+failsafe}
+
+lock -w /tmp/.failsafe
+echo /sbin/hotplug > /proc/sys/kernel/hotplug
+
+ifconfig $ifname 0.0.0.0 down
+
+mount_root
 exec /sbin/init