[Yaffs] [Patch] enable building yaffs2 directly in kernel tree
marty
Martin.Fouts at palmsource.com
Wed Jul 6 07:40:59 BST 2005
Below is a patch to the current cvs tree that adds functionality similar
to the patch-ker.sh from yaffs and makes it possible to compile yaffs2
directly in a 2.6 kernel tree. I tested this with 2.6.11.12 but it
should work for almost any tree.
One known problem: You can't build yaffs2 as a module from this, you have
to build it into the kernel.
diff -ruN yaffs2.pristine/Kconfig yaffs2/Kconfig
--- yaffs2.pristine/Kconfig 1969-12-31 16:00:00.000000000 -0800
+++ yaffs2/Kconfig 2005-07-05 22:42:56.000000000 -0700
@@ -0,0 +1,142 @@
+#
+# YAFFS file system configurations
+#
+config YAFFS_FS
+ tristate "Yet Another Flash Filing System(YAFFS) file system support (version 2)"
+ help
+ YAFFS2, for Yet Another Flash Filing System, is a filing system
+ optimised for NAND Flash chips.
+
+ To compile the YAFFS2 file system support as a module, choose M here:
+ the module will be called yaffs2.
+
+ If unsure, say N.
+
+ Further information on YAFFS2 is available at
+ <http://www.aleph1.co.uk/yaffs/>.
+
+config YAFFS_YAFFS2
+ depends on YAFFS_FS
+ tristate "YAFFS2"
+ help
+ Say y
+
+config YAFFS_MTD_ENABLED
+ bool "NAND mtd support - 512 byte / page devices"
+ depends on YAFFS_FS
+ help
+ This adds the yaffs file system support for working with a NAND mtd.
+
+ If unsure, say Y.
+
+config YAFFS2_MTD_ENABLED
+ bool "NAND mtd support = 2k byte / page devices"
+ depends on YAFFS_YAFFS2
+ help
+ This adds the yaffs2 file system support for working with a NAND mtd.
+
+ If unsure, say Y.
+
+config YAFFS_RAM_ENABLED
+ bool "yaffsram file system support"
+ depends on YAFFS_FS
+ help
+ This adds the yaffs2ram file system support. Nice for testing on x86,
+ but uses 2MB of RAM. Don't enable for NAND-based targets.
+
+ If unsure, say N.
+
+config YAFFS2_RAM_ENABLED
+ bool "yaffs2ram file system support"
+ depends on YAFFS_YAFFS2
+ help
+ This adds the yaffs2ram file system support. Nice for testing on x86,
+ but uses 2MB of RAM. Don't enable for NAND-based targets.
+
+ If unsure, say N.
+
+comment "WARNING: mtd and/or yaffsram support should be selected"
+ depends on YAFFS_FS && !YAFFS_MTD_ENABLED && !YAFFS_RAM_ENABLED
+
+comment "WARNING: mtd and/or yaff2sram support should be selected"
+ depends on YAFFS_YAFFS2 && !YAFFS2_MTD_ENABLED && !YAFFS2_RAM_ENABLED
+
+config YAFFS_USE_OLD_MTD
+ bool "Old mtd support"
+ depends on YAFFS_FS && 0
+ help
+ Enable this to use the old MTD stuff that did not have yaffs2 support.
+ You can use this to get around compilation problems, but the best
+ thing to do is to upgrade your MTD support. You will get better speed.
+
+ If unsure, say N.
+
+config YAFFS_USE_NANDECC
+ bool "Use ECC functions of the generic MTD-NAND driver"
+ depends on YAFFS_FS
+ default y
+ help
+ This enables the ECC functions of the generic MTD-NAND driver.
+ This will not work if you are using the old mtd.
+
+ NB Use NAND ECC does not work at present with yaffsram.
+
+ If unsure, say Y.
+
+config YAFFS_ECC_WRONG_ORDER
+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
+ depends on YAFFS_FS
+ help
+ This makes yaffs_ecc.c use the same ecc byte order as
+ Steven Hill's nand_ecc.c. If not set, then you get the
+ same ecc byte order as SmartMedia.
+
+ If unsure, say N.
+
+config YAFFS_USE_GENERIC_RW
+ bool "Use Linux file caching layer"
+ default y
+ depends on YAFFS_FS
+ help
+ Use generic_read/generic_write for reading/writing files. This
+ enables the use of the Linux file caching layer.
+
+ If you disable this, then caching is disabled and file read/write
+ is direct.
+
+ If unsure, say Y.
+
+config YAFFS_USE_HEADER_FILE_SIZE
+ bool "Use object header size"
+ depends on YAFFS_FS
+ help
+ When the flash is scanned, two file sizes are constructed:
+ * The size taken from the object header for the file.
+ * The size figured out by scanning the data chunks.
+ If this option is enabled, then the object header size is used,
+ otherwise the scanned size is used.
+
+ If unsure, say N.
+
+config YAFFS_DISABLE_CHUNK_ERASED_CHECK
+ bool "Turn off debug chunk erase check"
+ depends on YAFFS_FS
+ default y
+ help
+ Enabling this turns off the test that chunks are erased in flash
+ before writing to them. This is safe, since the write verification
+ will fail. Suggest enabling the test (ie. say N)
+ during development to help debug things.
+
+ If unsure, say Y.
+
+config YAFFS_SHORT_NAMES_IN_RAM
+ bool "Cache short names in RAM"
+ depends on YAFFS_FS
+ default y
+ help
+ If this config is set, then short names are stored with the
+ yaffs_Object. This costs an extra 16 bytes of RAM per object,
+ but makes look-ups faster.
+
+ If unsure, say Y.
diff -ruN yaffs2.pristine/Makefile.kernel yaffs2/Makefile.kernel
--- yaffs2.pristine/Makefile.kernel 1969-12-31 16:00:00.000000000 -0800
+++ yaffs2/Makefile.kernel 2005-07-05 22:42:48.000000000 -0700
@@ -0,0 +1,13 @@
+#
+# Makefile for the linux YAFFS filesystem routines.
+#
+
+obj-$(CONFIG_YAFFS_FS) += yaffs.o
+
+yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o
+yaffs-y += yaffs_packedtags2.o yaffs_ramem.o yaffs_ramem2k.o
+yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
+yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
+
+#yaffs2-$(CONFIG_YAFFS2_MTD_ENABLED) += yaffs_mtdif.o yaffs_mtdif2.o
+#yaffs2-$(CONFIG_YAFFS2_RAM_ENABLED) += yaffs_ramem.o
diff -ruN yaffs2.pristine/patch-ker.sh yaffs2/patch-ker.sh
--- yaffs2.pristine/patch-ker.sh 1969-12-31 16:00:00.000000000 -0800
+++ yaffs2/patch-ker.sh 2005-07-05 23:07:34.000000000 -0700
@@ -0,0 +1,109 @@
+#!/bin/sh
+#
+# YAFFS: Yet another FFS. A NAND-flash specific file system.
+#
+# Copyright (C) 2002 Aleph One Ltd.
+#
+# Created by Charles Manning <charles at aleph1.co.uk>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# Patch YAFFS into the kernel
+#
+# args: kpath : Full path to kernel sources to be patched
+#
+# Somewhat "inspired by" the mtd patchin script
+#
+# $Id: patch-ker.sh,v 1.1 2005/04/06 01:03:46 charles Exp $
+
+VERSION=0
+PATCHLEVEL=0
+SUBLEVEL=0
+LINUXDIR=$1
+
+# To be a Linux directory, it must have a Makefile
+
+
+# Display usage of this script
+usage () {
+ echo "usage: $0 kernelpath"
+ exit 1
+}
+
+
+
+if [ -z $LINUXDIR ]
+then
+ usage;
+fi
+
+# Check if kerneldir contains a Makefile
+if [ ! -f $LINUXDIR/Makefile ]
+then
+ echo "Directory $LINUXDIR does not exist or is not a kernel source directory";
+ exit 1;
+fi
+
+# Get kernel version
+VERSION=`grep -s VERSION <$LINUXDIR/Makefile | head -n 1 | sed s/'VERSION = '//`
+PATCHLEVEL=`grep -s PATCHLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'PATCHLEVEL = '//`
+SUBLEVEL=`grep -s SUBLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'SUBLEVEL = '//`
+
+# Can we handle this version?
+if [ $VERSION -ne 2 -o $PATCHLEVEL -lt 6 ]
+then
+ echo "Cannot patch kernel version $VERSION.$PATCHLEVEL.$SUBLEVEL, must be 2.6.x or higher"
+ exit 1;
+fi
+
+
+KCONFIG=$LINUXDIR/fs/Kconfig
+KCONFIGOLD=$LINUXDIR/fs/Kconfig.pre.yaffs
+YAFFS_PATCHED_STRING=`grep -s yaffs <$KCONFIG | head -n 1`
+
+MAKEFILE=$LINUXDIR/fs/Makefile
+MAKEFILEOLD=$LINUXDIR/fs/Makefile.pre.yaffs
+
+if [ ! -z "$YAFFS_PATCHED_STRING" ]
+then
+ YAFFS_PATCHED=0
+ echo "$KCONFIG already mentions YAFFS, so we will not change it"
+else
+ # Change the fs/Kconfig file
+ # Save the old Kconfig
+ # Copy all stuff up to JFFS
+ # Insert some YAFFS stuff
+ # Copy all the rest of the stuff
+
+ YAFFS_PATCHED=1
+ echo "Updating $KCONFIG"
+ mv -f $KCONFIG $KCONFIGOLD
+ sed -n -e "/JFFS/,99999 ! p" $KCONFIGOLD >$KCONFIG
+ echo "">>$KCONFIG
+ echo "# Patched by YAFFS" >>$KCONFIG
+ echo "source \"fs/yaffs2/Kconfig\"">>$KCONFIG
+ echo "">>$KCONFIG
+ sed -n -e "/JFFS/,99999 p" $KCONFIGOLD >>$KCONFIG
+
+ # now do fs/Makefile -- simply add the target at the end
+ echo "Updating $MAKEFILE"
+ cp -f $MAKEFILE $MAKEFILEOLD
+ echo "">>$MAKEFILE
+ echo "# Patched by YAFFS" >>$MAKEFILE
+ echo "obj-\$(CONFIG_YAFFS_FS) += yaffs2/" >>$MAKEFILE
+
+fi
+
+YAFFSDIR=$LINUXDIR/fs/yaffs2
+
+if [ -e $YAFFSDIR ]
+then
+ echo "$YAFFSDIR exists, not patching"
+else
+ mkdir $LINUXDIR/fs/yaffs2
+ cp Makefile.kernel $LINUXDIR/fs/yaffs2/Makefile
+ cp Kconfig $LINUXDIR/fs/yaffs2
+ cp *.c *.h $LINUXDIR/fs/yaffs2
+fi
diff -ruN yaffs2.pristine/README yaffs2/README
--- yaffs2.pristine/README 1969-12-31 16:00:00.000000000 -0800
+++ yaffs2/README 2005-07-05 22:44:18.000000000 -0700
@@ -0,0 +1,9 @@
+To build YAFFS in the Linux kernel tree you need to run the patch-in-yaffs
+script.
+
+After you've run the script, go back to your normal kernel making procedure
+and configure the yaffs settings you want.
+
+Prolems? Contact the yaffs mailing list.
+
+$Id: README,v 1.2 2005/04/06 01:03:46 charles Exp $
\ No newline at end of file
diff -ruN yaffs2.pristine/yaffs_ecc.c yaffs2/yaffs_ecc.c
--- yaffs2.pristine/yaffs_ecc.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_ecc.c 2005-07-05 23:14:34.000000000 -0700
@@ -32,6 +32,7 @@
const char *yaffs_ecc_c_version = "$Id: yaffs_ecc.c,v 1.2 2005/03/16 04:00:36 charles Exp $";
+#include <linux/config.h>
#include "yaffs_ecc.h"
static const unsigned char column_parity_table[] = {
diff -ruN yaffs2.pristine/yaffs_guts.c yaffs2/yaffs_guts.c
--- yaffs2.pristine/yaffs_guts.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_guts.c 2005-07-05 23:16:53.000000000 -0700
@@ -15,6 +15,7 @@
//yaffs_guts.c
const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.8 2005/07/05 23:54:59 charles Exp $";
+#include <linux/config.h>
#include "yportenv.h"
diff -ruN yaffs2.pristine/yaffs_mtdif2.c yaffs2/yaffs_mtdif2.c
--- yaffs2.pristine/yaffs_mtdif2.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_mtdif2.c 2005-07-05 23:15:49.000000000 -0700
@@ -17,6 +17,7 @@
const char *yaffs_mtdif2_c_version = "$Id: yaffs_mtdif2.c,v 1.1 2004/12/17 04:39:04 charles Exp $";
+#include <linux/config.h>
#ifdef CONFIG_YAFFS_MTD_ENABLED
#include "yportenv.h"
diff -ruN yaffs2.pristine/yaffs_mtdif.c yaffs2/yaffs_mtdif.c
--- yaffs2.pristine/yaffs_mtdif.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_mtdif.c 2005-07-05 23:15:46.000000000 -0700
@@ -15,6 +15,8 @@
const char *yaffs_mtdif_c_version = "$Id: yaffs_mtdif.c,v 1.1 2004/12/17 04:39:04 charles Exp $";
+#include <linux/config.h>
+
#ifdef CONFIG_YAFFS_MTD_ENABLED
#include "yportenv.h"
diff -ruN yaffs2.pristine/yaffs_packedtags1.c yaffs2/yaffs_packedtags1.c
--- yaffs2.pristine/yaffs_packedtags1.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_packedtags1.c 2005-07-05 23:16:07.000000000 -0700
@@ -1,3 +1,4 @@
+#include <linux/config.h>
#include "yaffs_packedtags1.h"
#include "yportenv.h"
diff -ruN yaffs2.pristine/yaffs_packedtags2.c yaffs2/yaffs_packedtags2.c
--- yaffs2.pristine/yaffs_packedtags2.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_packedtags2.c 2005-07-05 23:16:14.000000000 -0700
@@ -13,6 +13,7 @@
* version 2.1 as published by the Free Software Foundation.
*/
+#include <linux/config.h>
#include "yaffs_packedtags2.h"
#include "yportenv.h"
#include "yaffs_tagsvalidity.h"
diff -ruN yaffs2.pristine/yaffs_tagscompat.c yaffs2/yaffs_tagscompat.c
--- yaffs2.pristine/yaffs_tagscompat.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_tagscompat.c 2005-07-05 23:16:27.000000000 -0700
@@ -13,6 +13,7 @@
* $Id: yaffs_tagscompat.c,v 1.2 2005/03/16 04:00:36 charles Exp $
*/
+#include <linux/config.h>
#include "yaffs_guts.h"
#include "yaffs_tagscompat.h"
#include "yaffs_ecc.h"
diff -ruN yaffs2.pristine/yaffs_tagsvalidity.c yaffs2/yaffs_tagsvalidity.c
--- yaffs2.pristine/yaffs_tagsvalidity.c 2005-07-05 22:33:39.000000000 -0700
+++ yaffs2/yaffs_tagsvalidity.c 2005-07-05 23:16:38.000000000 -0700
@@ -15,6 +15,7 @@
*/
//yaffs_tagsvalidity.c
+#include <linux/config.h>
#include "yaffs_tagsvalidity.h"
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