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

4 files changed, 127 insertions, 5 deletions

diff --git a/target/linux/generic-2.6/patches/065-block2mtd_init.patch b/target/linux/generic-2.6/patches/065-block2mtd_init.patch
new file mode 100644
index 0000000000..ef483bedd1
--- /dev/null
+++ b/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)
+ {
diff --git a/target/linux/x86-2.6/Makefile b/target/linux/x86-2.6/Makefile
index 88b935f7be..2b8e497c90 100644
--- a/target/linux/x86-2.6/Makefile
+++ b/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 $(INCLUDE_DIR)/kernel-build.mk
 DEFAULT_PACKAGES += kmod-natsemi
diff --git a/target/linux/x86-2.6/config/default b/target/linux/x86-2.6/config/default
index 768947ae7f..6e2fc2fa35 100644
--- a/target/linux/x86-2.6/config/default
+++ b/target/linux/x86-2.6/config/default
@@ -204,7 +204,7 @@ CONFIG_M486=y
 # CONFIG_MGEODEGX1 is not set
 # CONFIG_MGEODE_LX is not set
 # CONFIG_MICROCODE is not set
-CONFIG_MINI_FO=m
+CONFIG_MINI_FO=y
 # CONFIG_MIXCOMWD is not set
 # CONFIG_MK6 is not set
 # CONFIG_MK7 is not set
diff --git a/target/linux/x86-2.6/image/Makefile b/target/linux/x86-2.6/image/Makefile
index 955a42b23c..e59446472e 100644
--- a/target/linux/x86-2.6/image/Makefile
+++ b/target/linux/x86-2.6/image/Makefile
@@ -22,18 +22,22 @@ ifeq ($(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
     root=$(ROOTPART) rootfstype=ext2
   endef
-
+  
   define Image/Build/grub
 	# left here because the image builder doesnt need these
 	$(INSTALL_DIR) $(KDIR)/root.grub/boot/grub
@@ -46,6 +50,7 @@ ifeq ($(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
 
@@ -65,8 +70,13 @@ define Image/Prepare
 	$(CP) $(LINUX_DIR)/arch/i386/boot/bzImage $(KDIR)/bzImage
 	$(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