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

6 files changed, 175 insertions, 34 deletions

diff --git a/package/base-files/brcm/bin/firstboot b/package/base-files/brcm/bin/firstboot
index b65d3ee98b..c3d9a64b87 100755
--- a/package/base-files/brcm/bin/firstboot
+++ b/package/base-files/brcm/bin/firstboot
@@ -1,5 +1,9 @@
 #!/bin/sh
-# Copyright (C) 2006 OpenWrt.org
+# $Id$
+. /etc/functions.sh
+
+partname="OpenWrt"
+mtdpart="$(find_mtd_part $partname)"
 
 rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
 jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
@@ -10,7 +14,7 @@ dupe() { # <new_root> <old_root>
 	{
 		cd $2 
 		find . -xdev -type d
-		echo "./dev ./jffs ./mnt ./proc ./tmp ./sys"
+		echo "./dev ./jffs ./mnt ./proc ./tmp"
 		# xdev skips mounted directories
 		cd $1 
 	} | xargs mkdir -p
@@ -21,7 +25,6 @@ dupe() { # <new_root> <old_root>
 		case "$file" in
 		./rom/note) ;; #nothing
 		./etc/config*|\
-		./etc/resolv.conf|\
 		./usr/lib/ipkg/info/*) cp -af $2/$file $file;;
 		*) ln -sf /rom/${file#./*} $file;;
 		esac
@@ -37,24 +40,37 @@ pivot() { # <new_root> <old_root>
 	pivot_root $1 $1$2 && {
 		mount -o move $2/dev /dev
 		mount -o move $2/tmp /tmp
-		mount -o move $2/sys /sys
+		mount -o move $2/jffs /jffs 2>&-
 		return 0
 	}
 }
 
-mountdp() { # <device> <mount_point> <ignored> <fs>
-        dev=$1; mnt=$2; shift 2; opt=$*
-	mount $dev $mnt $opt
-	dupe $mnt $rom
-	pivot $mnt /rom
+fopivot() { # <rw_root> <ro_root> <dupe?>
+	root=$1
+	{
+		mount -t mini_fo -o base=/,sto=$1 $1 /mnt 2>&- && root=/mnt
+	} || {
+		[ "$3" = "1" ] && {
+		mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
+		dupe $1 $rom
+		}
+	}
+	pivot $root $2
 }
 
 ramoverlay() {
 	mkdir -p /tmp/root
-	mountdp /tmp/root /mnt -o bind
+	fopivot /tmp/root /rom 1
 }
 
+# invoked as an executable
 [ "${0##*/}" = "firstboot" ] && {
+
+	[ -z "$mtdpart" ] && {
+		echo "MTD partition not found."
+		exit 1
+	}
+
 	[ -z "$rom" ] && {
 		echo "You do not have a squashfs partition; aborting"
 		echo "(firstboot cannot be run on jffs2 based firmwares)"
@@ -62,17 +78,31 @@ ramoverlay() {
 	}
 
 	[ "$1" = "switch2jffs" ] && {
-		mtd erase OpenWrt
-		mount -o remount,ro none / # try to avoid fs changing while copying
-		mount -o bind / /mnt
-		mount /dev/mtdblock/4 /rom/jffs -t jffs2
+		mtd erase "$partname"
+
+		# try to avoid fs changing while copying
+		mount -o remount,ro none / 2>&-
+
+		# copy ramoverlay to jffs2
+		mount "$mtdpart" /rom/jffs -t jffs2
 		echo -n "copying files ... "
-		cp -a /mnt/* /rom/jffs
-		umount /mnt
+		cp -a /tmp/root/* /rom/jffs 2>&-
 		echo "done"
+
+		# switch back to squashfs (temporarily)
+		# and park the ramdisk ontop of /tmp/root
 		pivot /rom /mnt
 		mount -o move /mnt /tmp/root
-		pivot /jffs /rom
+
+		# /jffs is the overlay
+		# /rom is the readonly
+		fopivot /jffs /rom
+
+		# try to get rid of /tmp/root
+		# this will almost always fail
+		umount /tmp/root 2>&-
+
+		# fs is clean
 		jffs2root --clean
 		exit 0
 	}
@@ -81,10 +111,18 @@ ramoverlay() {
 	[ \! -z "$jffs" ] && {
 		echo "firstboot has already been run"
 		echo "jffs2 partition is mounted, only resetting files"
-		dupe $jffs $rom
-		exit 0
+		grep mini_fo /proc/filesystems >&-
+		[ $? != 0 ] && {
+			dupe $jffs $rom
+			exit 0
+		} || { 
+			rm -rf $jffs/* 2>&-
+			mount -o remount $jffs / 2>&-
+			exit 0
+		}
 	}
 
-	mtd erase OpenWrt
-	mountdp /dev/mtdblock/4 /jffs -t jffs2
+	mtd erase "$partname"
+	mount "$mtdpart" /jffs -t jffs2
+	fopivot /jffs /rom 1
 }
diff --git a/package/base-files/brcm/etc/diag.sh b/package/base-files/brcm/etc/diag.sh
new file mode 100644
index 0000000000..3b08554c64
--- /dev/null
+++ b/package/base-files/brcm/etc/diag.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+# Copyright (C) 2006 OpenWrt.org
+
+set_led() {
+	local led="$1"
+	local state="$2"
+	[ -f "/proc/diag/led/$1" ] && echo "$state" > "/proc/diag/led/$1"
+}
+
+set_state() {
+	case "$1" in
+		preinit)
+			set_led dmz 1
+			set_led diag 1
+			set_led power 0
+		;;
+		failsafe)
+			set_led diag f
+			set_led power f
+			set_led dmz f
+		;;
+		done)
+			set_led dmz 0
+			set_led diag 0
+			set_led power 1
+		;;
+	esac
+}
diff --git a/package/base-files/brcm/etc/init.d/done b/package/base-files/brcm/etc/init.d/done
new file mode 100644
index 0000000000..0640b61938
--- /dev/null
+++ b/package/base-files/brcm/etc/init.d/done
@@ -0,0 +1,15 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2006 OpenWrt.org
+
+START=95
+boot() {
+	[ -d /tmp/root ] && {
+		lock /tmp/.switch2jffs
+		firstboot switch2jffs
+		lock -u /tmp/.switch2jffs
+	}
+
+	# set leds to normal state
+	. /etc/diag.sh
+	set_state done
+}
diff --git a/package/base-files/brcm/etc/preinit b/package/base-files/brcm/etc/preinit
index fb13e107e5..9c7f9448c9 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
diff --git a/package/base-files/brcm/sbin/hotplug.failsafe b/package/base-files/brcm/sbin/hotplug.failsafe
new file mode 100755
index 0000000000..0544339de8
--- /dev/null
+++ b/package/base-files/brcm/sbin/hotplug.failsafe
@@ -0,0 +1,4 @@
+#!/bin/sh
+case "$1" in
+	button) kill -USR1 1;;
+esac
diff --git a/package/base-files/brcm/sbin/mount_root b/package/base-files/brcm/sbin/mount_root
index e73afdc886..ffa6072c66 100755
--- a/package/base-files/brcm/sbin/mount_root
+++ b/package/base-files/brcm/sbin/mount_root
@@ -7,9 +7,6 @@ is_dirty() {
 	return $(hexdump -v /dev/mtdblock/1 -s $OFFSET -n 1 -e '"%d"')
 }
 
-size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
-mount none /tmp -t tmpfs -o size=$size
-
 if [ "$1" != "failsafe" ]; then 
 	mtd unlock linux
 	mount | grep jffs2 >&-
@@ -21,15 +18,14 @@ if [ "$1" != "failsafe" ]; then
 		[ $? != 0 ] && {
 			echo "switching to jffs2"
 			mount /dev/mtdblock/4 /jffs -t jffs2
-			pivot /jffs /rom
+			fopivot /jffs /rom
 		} || {
-			echo "jffs2 unusable; using ramdisk"
+			echo "jffs2 not ready yet; using ramdisk"
 			ramoverlay
 		}
 	fi
 fi
 
-mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
 mkdir -p /dev/pts
-mount none /dev/pts -t devpts
+mount none /dev/pts -t devpts 2>&-
 grep sysfs /proc/filesystems >/dev/null && mount -t sysfs none /sys 2>&-