mount_root: prepare base-files

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 36429

package/base-files/files.old/lib/firstboot/05_firstboot_skip

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+check_skip() {
+    if [ "$firstboot_skip_next" = "true" ]; then
+	return 0
+    else 
+	return 1
+    fi
+}
+

package/base-files/files.old/lib/firstboot/10_determine_parts

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+set_mtd_part() {
+    partname="rootfs_data"
+    mtdpart="$(find_mtd_part $partname)"
+}
+
+set_rom_part() {
+    rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
+}
+
+set_jffs_part() {
+    jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
+}
+
+determine_mtd_part() {
+    set_mtd_part
+    if [ -z "$mtdpart" ]; then
+	echo "MTD partition not found."
+	exit 1
+    fi
+}
+
+determine_rom_part() {
+    check_skip || {
+	set_rom_part
+	if [ -z "$rom" ]; then
+	    echo "You do not have a squashfs partition; aborting"
+	    echo "(firstboot cannot be run on jffs2 based firmwares)"
+	    exit 1
+	fi
+    }
+}
+
+determine_jffs2_part() {
+    check_skip || {
+	set_jffs_part
+    }
+}
+
+boot_hook_add switch2jffs determine_mtd_part
+boot_hook_add jffs2reset determine_mtd_part
+boot_hook_add switch2jffs determine_rom_part
+boot_hook_add jffs2reset determine_rom_part
+boot_hook_add switch2jffs determine_jffs2_part
+boot_hook_add jffs2reset determine_jffs2_part

package/base-files/files.old/lib/firstboot/10_no_fo_clear_overlay

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+no_fo_clear_overlay() {
+    # switch back to squashfs temporarily
+    pivot /rom /mnt
+
+    # get rid of the old overlay
+    umount -l /mnt
+
+    # another umount to get rid of the bind from /tmp/root
+    umount -l /mnt
+}
+
+boot_hook_add no_fo no_fo_clear_overlay

package/base-files/files.old/lib/firstboot/10_reset_has_mini_fo

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+reset_check_for_overlay() {
+    if grep -qE '(mini_fo|overlay)' /proc/filesystems; then
+	reset_has_fo=true
+    fi
+}
+
+boot_hook_add jffs2reset reset_check_for_overlay

package/base-files/files.old/lib/firstboot/20_has_mini_fo

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+check_for_overlay() {
+    if ! grep -qE '(mini_fo|overlay)' /proc/filesystems; then
+	boot_run_hook no_fo
+	exit 1
+    fi
+}
+
+boot_hook_add switch2jffs check_for_overlay

package/base-files/files.old/lib/firstboot/20_no_fo_mount_jffs

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+no_fo_mount_jffs() {
+    # initialize jffs2
+    mount -o noatime "$mtdpart" /overlay -t jffs2 || exit
+
+    # workaround to ensure that union can attach properly
+    sync
+    ls /overlay >/dev/null
+}
+
+boot_hook_add no_fo no_fo_mount_jffs

package/base-files/files.old/lib/firstboot/20_reset_clear_jffs

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+reset_clear_jffs() {
+    [ "$reset_has_fo" = "true" ] && {
+	rm -rf $jffs/* 2>&-
+	mount -o remount $jffs / 2>&-
+	exit 0
+    } || reset_has_fo=false
+}
+
+boot_hook_add jffs2reset reset_clear_jffs

package/base-files/files.old/lib/firstboot/30_is_rootfs_mounted

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+skip_if_rootfs_mounted() {
+    mount -o noatime -t jffs2 "$mtdpart" /rom/overlay || exit
+}
+
+boot_hook_add switch2jffs skip_if_rootfs_mounted

package/base-files/files.old/lib/firstboot/30_no_fo_pivot

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+no_fo_pivot() {
+    # switch to the new (empty) jffs2
+    fopivot /overlay /rom 1
+}
+
+boot_hook_add no_fo no_fo_pivot

package/base-files/files.old/lib/firstboot/30_reset_copy_rom

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+reset_copy_rom() {
+    [ "$reset_has_fo" != "true" ] && {
+	dupe $jffs $rom
+	exit 0
+    } 
+}
+
+boot_hook_add jffs2reset reset_copy_rom

package/base-files/files.old/lib/firstboot/40_copy_ramoverlay

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+copy_ramoverlay() {
+    # try to avoid fs changing while copying
+    mount -o remount,ro none / 2>&-
+    # copy ramoverlay to jffs2
+    echo -n "copying files ... "
+    cp -a /tmp/root/* /rom/overlay 2>&-
+    echo "done"
+}
+
+boot_hook_add switch2jffs copy_ramoverlay

package/base-files/files.old/lib/firstboot/40_no_fo_copy_ramoverlay

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+no_fo_copy_ramoverlay() {
+    # copy ramoverlay to jffs2, must be done after switching
+    # to the new rootfs to avoid creating opaque directories
+    echo -n "copying files ... "
+    cp -a /tmp/root/* / >/dev/null 2>&1
+    sync
+}
+
+boot_hook_add no_fo no_fo_ramoverlay

package/base-files/files.old/lib/firstboot/50_pivot

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+with_fo_pivot() {
+    # switch back to squashfs (temporarily)
+    # and park the ramdisk ontop of /tmp/root
+    pivot /rom /mnt
+    mount -o move /mnt /tmp/root
+
+    # /overlay is the overlay
+    # /rom is the readonly
+    fopivot /overlay /rom
+}
+
+boot_hook_add switch2jffs with_fo_pivot

package/base-files/files.old/lib/firstboot/99_10_no_fo_cleanup

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Copyright (C) 2006-2010 OpenWrt.org
+# Copyright (C) 2010 Vertical Communications
+
+no_fo_cleanup() {
+    echo "done"
+    umount -l /overlay
+    umount -l /tmp/root
+    exit 0
+}
+
+boot_hook_add no_fo no_fo_cleanup

package/base-files/files.old/lib/firstboot/99_10_with_fo_cleanup

@@ -6,7 +6,7 @@
 with_fo_cleanup() {
     # try to get rid of /tmp/root
     # this will almost always fail
-    umount /tmp/root 2>&-
+    umount -l /tmp/root 2>&-
 	grep -q overlay /proc/filesystems && {
 		cd /
 		(