make squashfs overlay support more generic and integrate it for x86-2.6

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6450 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/image.mk

@@ -17,6 +17,19 @@ JFFS2OPTS     :=  --pad --big-endian --squash
 SQUASHFS_OPTS :=  -be
 endif
 
+define add_jffs2_mark
+	echo -ne '\xde\xad\xc0\xde' >> $(1)
+endef
+
+# pad to 64k and add jffs2 end-of-filesystem mark
+# do this twice to make sure that this works with 128k blocksize as well
+define prepare_generic_squashfs
+	dd if=$(1) of=$(KDIR)/tmpfile.1 bs=64k conv=sync
+	$(call add_jffs2_mark,$(KDIR)/tmpfile.1)
+	dd of=$(1) if=$(KDIR)/tmpfile.1 bs=64k conv=sync
+	$(call add_jffs2_mark,$(1))
+endef
+
 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
   ifeq ($(CONFIG_TARGET_ROOTFS_JFFS2),y)
     define Image/mkfs/jffs2
@@ -25,9 +38,10 @@ ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 		$(STAGING_DIR)/bin/mkfs.jffs2 $(JFFS2OPTS) -e 0x10000 -o $(KDIR)/root.jffs2-64k -d $(BUILD_DIR)/root
 		$(STAGING_DIR)/bin/mkfs.jffs2 $(JFFS2OPTS) -e 0x20000 -o $(KDIR)/root.jffs2-128k -d $(BUILD_DIR)/root
 
+		
 		# add End-of-Filesystem markers
-		echo -ne '\xde\xad\xc0\xde' >> $(KDIR)/root.jffs2-64k
-		echo -ne '\xde\xad\xc0\xde' >> $(KDIR)/root.jffs2-128k
+		$(call add_jffs2_mark,$(KDIR)/root.jffs2-64k)
+		$(call add_jffs2_mark,$(KDIR)/root.jffs2-128k)
 	
 		$(call Image/Build,jffs2-64k)
 		$(call Image/Build,jffs2-128k)

package/base-files/Makefile

@@ -41,6 +41,11 @@ define Package/base-files$(TARGET)
 	This package contains a base filesystem and system scripts for OpenWrt.
   URL:=http://openwrt.org/
   VERSION:=$(PKG_RELEASE)-$(REV)
+  $(call Config,network.lan.proto,string,static,LAN Protocol)
+  $(call Config,network.lan.ipaddr,ip,192.168.1.1,LAN IP Address)
+  $(call Config,network.lan.netmask,netmask,255.255.0.0,LAN Network Mask)
+  $(call Config,network.lan.gateway,ip,,LAN Gateway)
+  $(call Config,network.lan.dns,ip,,LAN DNS server)
 endef
 
 define Package/base-files$(TARGET)/conffiles
@@ -153,3 +158,5 @@ $(eval $(call BuildPackage,base-files$(TARGET)))
 $(eval $(call BuildPackage,libgcc))
 $(eval $(call BuildPackage,libpthread))
 $(eval $(call BuildPackage,uclibc))
+
+

package/base-files/files/bin/firstboot

@@ -0,0 +1,128 @@
+#!/bin/sh
+# $Id: firstboot 5544 2006-11-17 03:07:10Z nbd $
+. /etc/functions.sh
+
+partname="rootfs_data"
+mtdpart="$(find_mtd_part $partname)"
+
+rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
+jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
+
+dupe() { # <new_root> <old_root>
+	cd $1
+	echo -n "creating directories... "
+	{
+		cd $2 
+		find . -xdev -type d
+		echo "./dev ./jffs ./mnt ./proc ./tmp"
+		# xdev skips mounted directories
+		cd $1 
+	} | xargs mkdir -p
+	echo "done"
+
+	echo -n "setting up symlinks... "
+	for file in $(cd $2; find . -xdev -type f;); do
+		case "$file" in
+		./rom/note) ;; #nothing
+		./etc/config*|\
+		./usr/lib/ipkg/info/*) cp -af $2/$file $file;;
+		*) ln -sf /rom/${file#./*} $file;;
+		esac
+	done
+	for file in $(cd $2; find . -xdev -type l;); do
+		cp -af $2/${file#./*} $file
+	done
+	echo "done"
+}
+
+pivot() { # <new_root> <old_root>
+	mount -o move /proc $1/proc && \
+	pivot_root $1 $1$2 && {
+		mount -o move $2/dev /dev
+		mount -o move $2/tmp /tmp
+		mount -o move $2/jffs /jffs 2>&-
+		return 0
+	}
+}
+
+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 $2
+}
+
+ramoverlay() {
+	mkdir -p /tmp/root
+	fopivot /tmp/root /rom 1
+}
+
+# invoked as an executable
+[ "${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)"
+		exit 1
+	}
+
+	[ "$1" = "switch2jffs" ] && {
+		mtd erase "$partname"
+
+		# try to avoid fs changing while copying
+		mount -o remount,ro none / 2>&-
+
+		# copy ramoverlay to jffs2
+		mount "$mtdpart" /rom/jffs -t jffs2
+		echo -n "copying files ... "
+		cp -a /tmp/root/* /rom/jffs 2>&-
+		echo "done"
+
+		# switch back to squashfs (temporarily)
+		# and park the ramdisk ontop of /tmp/root
+		pivot /rom /mnt
+		mount -o move /mnt /tmp/root
+
+		# /jffs is the overlay
+		# /rom is the readonly
+		fopivot /jffs /rom
+
+		# try to get rid of /tmp/root
+		# this will almost always fail
+		umount /tmp/root 2>&-
+
+		# fs is clean
+		jffs2root --clean
+		exit 0
+	}
+
+	# script run manually
+	[ \! -z "$jffs" ] && {
+		echo "firstboot has already been run"
+		echo "jffs2 partition is mounted, only resetting files"
+		grep mini_fo /proc/filesystems >&-
+		[ $? != 0 ] && {
+			dupe $jffs $rom
+			exit 0
+		} || { 
+			rm -rf $jffs/* 2>&-
+			mount -o remount $jffs / 2>&-
+			exit 0
+		}
+	}
+
+	mtd erase "$partname"
+	mount "$mtdpart" /jffs -t jffs2
+	fopivot /jffs /rom 1
+}

package/base-files/files/etc/preinit

@@ -0,0 +1,5 @@
+#!/bin/sh
+# Copyright (C) 2006 OpenWrt.org
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+mount_root
+exec /sbin/init

package/base-files/files/sbin/mount_root

@@ -1,10 +1,21 @@
 #!/bin/sh
 # Copyright (C) 2006 OpenWrt.org
+. /etc/functions.sh
 
 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,nosuid,nodev,mode=1777
+
+grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
+	mtd unlock rootfs
+	grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
+		. /bin/firstboot
+		echo "switching to jffs2"
+		mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
+		fopivot /jffs /rom
+	}
+} || mount -o remount,rw /dev/root /
+
 mkdir -p /dev/pts
 mount none /dev/pts -t devpts
-mount -t sysfs none /sys 2>&-
-mount -o remount,rw /dev/root /
+grep sysfs /proc/filesystems >/dev/null && mount -t sysfs none /sys 2>&-

target/linux/generic-2.6/patches/065-block2mtd_init.patch

@@ -0,0 +1,112 @@
+--- linux.old/drivers/mtd/devices/block2mtd.c	2007-03-02 01:00:13.866987272 +0100
++++ linux.dev/drivers/mtd/devices/block2mtd.c	2007-03-02 02:03:45.558522080 +0100
+@@ -16,6 +16,7 @@
+ #include <linux/list.h>
+ #include <linux/init.h>
+ #include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
+ #include <linux/buffer_head.h>
+ #include <linux/mutex.h>
+ #include <linux/mount.h>
+@@ -287,10 +288,11 @@
+ 
+ 
+ /* FIXME: ensure that mtd->size % erase_size == 0 */
+-static struct block2mtd_dev *add_device(char *devname, int erase_size)
++static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
+ {
+ 	struct block_device *bdev;
+ 	struct block2mtd_dev *dev;
++	struct mtd_partition *part;
+ 
+ 	if (!devname)
+ 		return NULL;
+@@ -330,14 +332,18 @@
+ 
+ 	/* Setup the MTD structure */
+ 	/* make the name contain the block device in */
+-	dev->mtd.name = kmalloc(sizeof("block2mtd: ") + strlen(devname),
+-			GFP_KERNEL);
++
++	if (!mtdname)
++		mtdname = devname;
++
++	dev->mtd.name = kmalloc(strlen(mtdname), GFP_KERNEL);
++
+ 	if (!dev->mtd.name)
+ 		goto devinit_err;
++	
++	strcpy(dev->mtd.name, mtdname);
+ 
+-	sprintf(dev->mtd.name, "block2mtd: %s", devname);
+-
+-	dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
++	dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
+ 	dev->mtd.erasesize = erase_size;
+ 	dev->mtd.writesize = 1;
+ 	dev->mtd.type = MTD_RAM;
+@@ -349,15 +355,18 @@
+ 	dev->mtd.read = block2mtd_read;
+ 	dev->mtd.priv = dev;
+ 	dev->mtd.owner = THIS_MODULE;
+-
+-	if (add_mtd_device(&dev->mtd)) {
++	
++	part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
++	part->name = dev->mtd.name;
++	part->offset = 0;
++	part->size = dev->mtd.size;
++	if (add_mtd_partitions(&dev->mtd, part, 1)) {
+ 		/* Device didnt get added, so free the entry */
+ 		goto devinit_err;
+ 	}
+ 	list_add(&dev->list, &blkmtd_device_list);
+ 	INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
+-			dev->mtd.name + strlen("blkmtd: "),
+-			dev->mtd.erasesize >> 10, dev->mtd.erasesize);
++			mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
+ 	return dev;
+ 
+ devinit_err:
+@@ -430,9 +439,9 @@
+ 
+ static int block2mtd_setup2(const char *val)
+ {
+-	char buf[80 + 12]; /* 80 for device, 12 for erase size */
++	char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
+ 	char *str = buf;
+-	char *token[2];
++	char *token[3];
+ 	char *name;
+ 	size_t erase_size = PAGE_SIZE;
+ 	int i, ret;
+@@ -443,7 +452,7 @@
+ 	strcpy(str, val);
+ 	kill_final_newline(str);
+ 
+-	for (i = 0; i < 2; i++)
++	for (i = 0; i < 3; i++)
+ 		token[i] = strsep(&str, ",");
+ 
+ 	if (str)
+@@ -463,8 +472,10 @@
+ 			parse_err("illegal erase size");
+ 		}
+ 	}
++	if (token[2] && (strlen(token[2]) + 1 > 80))
++		parse_err("mtd device name too long");
+ 
+-	add_device(name, erase_size);
++	add_device(name, erase_size, token[2]);
+ 
+ 	return 0;
+ }
+@@ -498,7 +509,7 @@
+ 
+ 
+ module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
+-MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
++MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
+ 
+ static int __init block2mtd_init(void)
+ {

target/linux/x86-2.6/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH=i386
 BOARD:=x86
 BOARDNAME:=x86
-FEATURES:=jffs2 ext2
+FEATURES:=squashfs jffs2 ext2
 
 include $(INCLUDE_DIR)/kernel-build.mk
 DEFAULT_PACKAGES += kmod-natsemi

target/linux/x86-2.6/config/default

@@ -204,7 +204,7 @@ CONFIG_M486=y
 # CONFIG_MGEODEGX1 is not set
 # CONFIG_MGEODE_LX is not set
 # CONFIG_MICROCODE is not set
-CONFIG_MINI_FO=m
+CONFIG_MINI_FO=y
 # CONFIG_MIXCOMWD is not set
 # CONFIG_MK6 is not set
 # CONFIG_MK7 is not set

target/linux/x86-2.6/image/Makefile

@@ -22,12 +22,16 @@ ifeq ($(CONFIG_X86_GRUB_IMAGES),y)
 	$(MAKE) -C grub clean
   endef
 
+  define Image/cmdline/squashfs
+    block2mtd.block2mtd=$(ROOTPART),65536,rootfs root=/dev/mtdblock0 rootfstype=squashfs init=/etc/preinit
+  endef
+
   define Image/cmdline/jffs2-64k
-    block2mtd.block2mtd=$(ROOTPART),65536 root=/dev/mtdblock0 rootfstype=jffs2
+    block2mtd.block2mtd=$(ROOTPART),65536,rootfs root=/dev/mtdblock0 rootfstype=jffs2
   endef
 
   define Image/cmdline/jffs2-128k
-    block2mtd.block2mtd=$(ROOTPART),131072 root=/dev/mtdblock0 rootfstype=jffs2
+    block2mtd.block2mtd=$(ROOTPART),131072,rootfs root=/dev/mtdblock0 rootfstype=jffs2
   endef
 
   define Image/cmdline/ext2
@@ -46,6 +50,7 @@ ifeq ($(CONFIG_X86_GRUB_IMAGES),y)
 		-e 's#@BAUDRATE@#$(CONFIG_X86_GRUB_BAUDRATE)#g' \
 		./grub/menu.lst > $(KDIR)/root.grub/boot/grub/menu.lst
 	PADDING="$(CONFIG_X86_GRUB_IMAGES_PAD)" PATH="$(STAGING_DIR)/usr/sbin:$(STAGING_DIR)/bin:$(PATH)" ./gen_image.sh $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(1).image $(CONFIG_X86_GRUB_KERNELPART) $(KDIR)/root.grub $(CONFIG_TARGET_ROOTFS_FSPART) $(KDIR)/root.$(1)
+	$(call Image/Build/grub/$(1))
   endef
 endif
 
@@ -66,7 +71,12 @@ define Image/Prepare
 	$(call Image/Prepare/grub)
 endef
   
+define Image/Build/squashfs
+    $(call prepare_generic_squashfs,$(KDIR)/root.squashfs)
+endef
+
 define Image/Build
+	$(call Image/Build/$(1))
 	$(call Image/Build/grub,$(1))
 	$(CP) $(KDIR)/root.$(1) $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(1).fs
 	$(CP) $(KDIR)/bzImage $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-vmlinuz