-diff -urN linux-2.6.21.1.old/fs/Kconfig linux-2.6.21.1.dev/fs/Kconfig
---- linux-2.6.21.1.old/fs/Kconfig 2007-05-26 21:04:21.321701752 +0200
-+++ linux-2.6.21.1.dev/fs/Kconfig 2007-05-26 21:13:40.641672192 +0200
-@@ -1192,6 +1192,8 @@
- To compile the EFS file system support as a module, choose M here: the
- module will be called efs.
-
-+source "fs/yaffs2/Kconfig"
+diff -urN linux-2.6.21.1/fs/yaffs2/Kconfig linux-2.6.21.1.new/fs/yaffs2/Kconfig
+--- linux-2.6.21.1/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/Kconfig 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,175 @@
++#
++# YAFFS file system configurations
++#
+
- config JFFS2_FS
- tristate "Journalling Flash File System v2 (JFFS2) support"
- select CRC32
-diff -urN linux-2.6.21.1.old/fs/Makefile linux-2.6.21.1.dev/fs/Makefile
---- linux-2.6.21.1.old/fs/Makefile 2007-05-26 21:04:21.321701752 +0200
-+++ linux-2.6.21.1.dev/fs/Makefile 2007-05-26 21:13:40.641672192 +0200
-@@ -116,3 +116,4 @@
- obj-$(CONFIG_DEBUG_FS) += debugfs/
- obj-$(CONFIG_OCFS2_FS) += ocfs2/
- obj-$(CONFIG_GFS2_FS) += gfs2/
-+obj-$(CONFIG_YAFFS_FS) += yaffs2/
-diff -urN linux-2.6.21.1.old/fs/yaffs2/devextras.h linux-2.6.21.1.dev/fs/yaffs2/devextras.h
---- linux-2.6.21.1.old/fs/yaffs2/devextras.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/devextras.h 2007-05-26 21:13:40.683665808 +0200
-@@ -0,0 +1,265 @@
++config YAFFS_FS
++ tristate "YAFFS2 file system support"
++ default n
++ depends on MTD
++ select YAFFS_YAFFS1
++ select YAFFS_YAFFS2
++ help
++ YAFFS2, or 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_YAFFS1
++ bool "512 byte / page devices"
++ depends on YAFFS_FS
++ default y
++ help
++ Enable YAFFS1 support -- yaffs for 512 byte / page devices
++
++ Not needed for 2K-page devices.
++
++ If unsure, say Y.
++
++config YAFFS_9BYTE_TAGS
++ bool "Use older-style on-NAND data format with pageStatus byte"
++ depends on YAFFS_YAFFS1
++ default n
++ help
++
++ Older-style on-NAND data format has a "pageStatus" byte to record
++ chunk/page state. This byte is zero when the page is discarded.
++ Choose this option if you have existing on-NAND data using this
++ format that you need to continue to support. New data written
++ also uses the older-style format. Note: Use of this option
++ generally requires that MTD's oob layout be adjusted to use the
++ older-style format. See notes on tags formats and MTD versions.
++
++ If unsure, say N.
++
++config YAFFS_DOES_ECC
++ bool "Lets Yaffs do its own ECC"
++ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
++ default n
++ help
++ This enables Yaffs to use its own ECC functions instead of using
++ the ones from the generic MTD-NAND driver.
++
++ If unsure, say N.
++
++config YAFFS_ECC_WRONG_ORDER
++ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
++ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
++ default n
++ 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_YAFFS2
++ bool "2048 byte (or larger) / page devices"
++ depends on YAFFS_FS
++ default y
++ help
++ Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices
++
++ If unsure, say Y.
++
++config YAFFS_AUTO_YAFFS2
++ bool "Autoselect yaffs2 format"
++ depends on YAFFS_YAFFS2
++ default y
++ help
++ Without this, you need to explicitely use yaffs2 as the file
++ system type. With this, you can say "yaffs" and yaffs or yaffs2
++ will be used depending on the device page size (yaffs on
++ 512-byte page devices, yaffs2 on 2K page devices).
++
++ If unsure, say Y.
++
++config YAFFS_DISABLE_LAZY_LOAD
++ bool "Disable lazy loading"
++ depends on YAFFS_YAFFS2
++ default n
++ help
++ "Lazy loading" defers loading file details until they are
++ required. This saves mount time, but makes the first look-up
++ a bit longer.
++
++ Lazy loading will only happen if enabled by this option being 'n'
++ and if the appropriate tags are available, else yaffs2 will
++ automatically fall back to immediate loading and do the right
++ thing.
++
++ Lazy laoding will be required by checkpointing.
++
++ Setting this to 'y' will disable lazy loading.
++
++ If unsure, say N.
++
++config YAFFS_CHECKPOINT_RESERVED_BLOCKS
++ int "Reserved blocks for checkpointing"
++ depends on YAFFS_YAFFS2
++ default 10
++ help
++ Give the number of Blocks to reserve for checkpointing.
++ Checkpointing saves the state at unmount so that mounting is
++ much faster as a scan of all the flash to regenerate this state
++ is not needed. These Blocks are reserved per partition, so if
++ you have very small partitions the default (10) may be a mess
++ for you. You can set this value to 0, but that does not mean
++ checkpointing is disabled at all. There only won't be any
++ specially reserved blocks for checkpointing, so if there is
++ enough free space on the filesystem, it will be used for
++ checkpointing.
++
++ If unsure, leave at default (10), but don't wonder if there are
++ always 2MB used on your large page device partition (10 x 2k
++ pagesize). When using small partitions or when being very small
++ on space, you probably want to set this to zero.
++
++config YAFFS_DISABLE_WIDE_TNODES
++ bool "Turn off wide tnodes"
++ depends on YAFFS_FS
++ default n
++ help
++ Wide tnodes are only used for NAND arrays >=32MB for 512-byte
++ page devices and >=128MB for 2k page devices. They use slightly
++ more RAM but are faster since they eliminate chunk group
++ searching.
++
++ Setting this to 'y' will force tnode width to 16 bits and save
++ memory but make large arrays slower.
++
++ If unsure, say N.
++
++config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ bool "Force chunk erase check"
++ depends on YAFFS_FS
++ default n
++ help
++ Normally YAFFS only checks chunks before writing until an erased
++ chunk is found. This helps to detect any partially written
++ chunks that might have happened due to power loss.
++
++ Enabling this forces on the test that chunks are erased in flash
++ before writing to them. This takes more time but is potentially
++ a bit more secure.
++
++ Suggest setting Y during development and ironing out driver
++ issues etc. Suggest setting to N if you want faster writing.
++
++ 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 -urN linux-2.6.21.1/fs/yaffs2/Makefile linux-2.6.21.1.new/fs/yaffs2/Makefile
+--- linux-2.6.21.1/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/Makefile 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,11 @@
++#
++# 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_checkptrw.o
++yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
++yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
++yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
++yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
+diff -urN linux-2.6.21.1/fs/yaffs2/devextras.h linux-2.6.21.1.new/fs/yaffs2/devextras.h
+--- linux-2.6.21.1/fs/yaffs2/devextras.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/devextras.h 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,264 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * devextras.h
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ *
++ */
++
++/*
+ * This file is just holds extra declarations used during development.
+ * Most of these are from kernel includes placed here so we can use them in
+ * applications.
+ *
-+ * $Id: devextras.h,v 1.2 2005/08/11 02:37:49 marty Exp $
-+ *
+ */
+
+#ifndef __EXTRAS_H__
+#endif
+
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/Kconfig linux-2.6.21.1.dev/fs/yaffs2/Kconfig
---- linux-2.6.21.1.old/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/Kconfig 2007-05-26 21:13:40.683665808 +0200
-@@ -0,0 +1,135 @@
-+#
-+# YAFFS file system configurations
-+#
-+
-+config YAFFS_FS
-+ tristate "YAFFS2 file system support"
-+ default n
-+ depends on MTD
-+ select YAFFS_YAFFS1
-+ select YAFFS_YAFFS2
-+ help
-+ YAFFS2, or Yet Another Flash Filing System, is a filing system
-+ optimised for NAND Flash chips.
+diff -urN linux-2.6.21.1/fs/yaffs2/moduleconfig.h linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h
+--- linux-2.6.21.1/fs/yaffs2/moduleconfig.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,65 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Martin Fouts <Martin.Fouts@palmsource.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
+
-+ To compile the YAFFS2 file system support as a module, choose M here:
-+ the module will be called yaffs2.
++#ifndef __YAFFS_CONFIG_H__
++#define __YAFFS_CONFIG_H__
+
-+ If unsure, say N.
++#ifdef YAFFS_OUT_OF_TREE
+
-+ Further information on YAFFS2 is available at
-+ <http://www.aleph1.co.uk/yaffs/>.
++/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
++#define CONFIG_YAFFS_FS
++#define CONFIG_YAFFS_YAFFS1
++#define CONFIG_YAFFS_YAFFS2
+
-+config YAFFS_YAFFS1
-+ bool "512 byte / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable YAFFS1 support -- yaffs for 512 byte / page devices
++/* These options are independent of each other. Select those that matter. */
+
-+ If unsure, say Y.
++/* Default: Not selected */
++/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
++//#define CONFIG_YAFFS_DOES_ECC
+
-+config YAFFS_DOES_ECC
-+ bool "Lets Yaffs do its own ECC"
-+ depends on YAFFS_FS && YAFFS_YAFFS1
-+ default n
-+ help
-+ This enables Yaffs to use its own ECC functions instead of using
-+ the ones from the generic MTD-NAND driver.
++/* Default: Not selected */
++/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
++/* CONFIG_YAFFS_DOES_ECC is set */
++//#define CONFIG_YAFFS_ECC_WRONG_ORDER
+
-+ If unsure, say N.
++/* Default: Selected */
++/* Meaning: Disables testing whether chunks are erased before writing to them*/
++#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
+
-+config YAFFS_ECC_WRONG_ORDER
-+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
-+ depends on YAFFS_FS && YAFFS_DOES_ECC
-+ default n
-+ 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.
++/* Default: Selected */
++/* Meaning: Cache short names, taking more RAM, but faster look-ups */
++#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+
-+ If unsure, say N.
++/* Default: 10 */
++/* Meaning: set the count of blocks to reserve for checkpointing */
++#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
+
-+config YAFFS_YAFFS2
-+ bool "2048 byte (or larger) / page devices"
-+ depends on YAFFS_FS
-+ default y
-+ help
-+ Enable YAFFS2 support -- yaffs for >= 2048 byte / page larger devices
++/*
++Older-style on-NAND data format has a "pageStatus" byte to record
++chunk/page state. This byte is zeroed when the page is discarded.
++Choose this option if you have existing on-NAND data in this format
++that you need to continue to support. New data written also uses the
++older-style format.
++Note: Use of this option generally requires that MTD's oob layout be
++adjusted to use the older-style format. See notes on tags formats and
++MTD versions.
++*/
++/* Default: Not selected */
++/* Meaning: Use older-style on-NAND data format with pageStatus byte */
++#define CONFIG_YAFFS_9BYTE_TAGS
+
-+ If unsure, say Y.
++#endif /* YAFFS_OUT_OF_TREE */
+
-+config YAFFS_AUTO_YAFFS2
-+ bool "Autoselect yaffs2 format"
-+ depends on YAFFS_YAFFS2
-+ default y
-+ help
-+ Without this, you need to explicitely use yaffs2 as the file
-+ system type. With this, you can say "yaffs" and yaffs or yaffs2
-+ will be used depending on the device page size.
++#endif /* __YAFFS_CONFIG_H__ */
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,404 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@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.
++ */
+
-+ If unsure, say Y.
++const char *yaffs_checkptrw_c_version =
++ "$Id: yaffs_checkptrw.c,v 1.14 2007-05-15 20:07:40 charles Exp $";
+
-+config YAFFS_DISABLE_LAZY_LOAD
-+ bool "Disable lazy loading"
-+ depends on YAFFS_YAFFS2
-+ default n
-+ help
-+ "Lazy loading" defers loading file details until they are
-+ required. This saves mount time, but makes the first look-up
-+ a bit longer.
+
-+ Lazy loading will only happen if enabled by this option being 'n'
-+ and if the appropriate tags are available, else yaffs2 will
-+ automatically fall back to immediate loading and do the right
-+ thing.
-+
-+ Lazy laoding will be required by checkpointing.
-+
-+ Setting this to 'y' will disable lazy loading.
-+
-+ If unsure, say N.
-+
-+config YAFFS_DISABLE_WIDE_TNODES
-+ bool "Turn off wide tnodes"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Wide tnodes are only used for large NAND arrays (>=32MB for
-+ 512-byte page devices and >=128MB for 2k page devices). They use
-+ slightly more RAM but are faster since they eliminate chunk group
-+ searching.
-+
-+ Setting this to 'y' will force tnode width to 16 bits and make
-+ large arrays slower.
-+
-+ If unsure, say N.
-+
-+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
-+ bool "Force chunk erase check"
-+ depends on YAFFS_FS
-+ default n
-+ help
-+ Normally YAFFS only checks chunks before writing until an erased
-+ chunk is found. This helps to detect any partially written chunks
-+ that might have happened due to power loss.
-+
-+ Enabling this forces on the test that chunks are erased in flash
-+ before writing to them. This takes more time but is potentially a
-+ bit more secure.
-+
-+ Suggest setting Y during development and ironing out driver issues
-+ etc. Suggest setting to N if you want faster writing.
-+
-+ 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 -urN linux-2.6.21.1.old/fs/yaffs2/Makefile linux-2.6.21.1.dev/fs/yaffs2/Makefile
---- linux-2.6.21.1.old/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/Makefile 2007-05-26 21:13:40.683665808 +0200
-@@ -0,0 +1,10 @@
-+#
-+# 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_checkptrw.o
-+yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
-+yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
-+yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
-diff -urN linux-2.6.21.1.old/fs/yaffs2/moduleconfig.h linux-2.6.21.1.dev/fs/yaffs2/moduleconfig.h
---- linux-2.6.21.1.old/fs/yaffs2/moduleconfig.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/moduleconfig.h 2007-05-26 21:13:40.684665656 +0200
-@@ -0,0 +1,32 @@
-+#ifndef __YAFFS_CONFIG_H__
-+#define __YAFFS_CONFIG_H__
-+
-+#ifdef YAFFS_OUT_OF_TREE
-+
-+/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
-+#define CONFIG_YAFFS_FS
-+#define CONFIG_YAFFS_YAFFS1
-+#define CONFIG_YAFFS_YAFFS2
-+
-+/* These options are independent of each other. Select those that matter. */
-+
-+/* Default: Not selected */
-+/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
-+//#define CONFIG_YAFFS_DOES_ECC
-+
-+/* Default: Not selected */
-+/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
-+/* CONFIG_YAFFS_DOES_ECC is set */
-+//#define CONFIG_YAFFS_ECC_WRONG_ORDER
-+
-+/* Default: Selected */
-+/* Meaning: Disables testing whether chunks are erased before writing to them*/
-+#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
-+
-+/* Default: Selected */
-+/* Meaning: Cache short names, taking more RAM, but faster look-ups */
-+#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
-+
-+#endif /* YAFFS_OUT_OF_TREE */
-+
-+#endif /* __YAFFS_CONFIG_H__ */
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_checkptrw.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_checkptrw.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_checkptrw.c 2007-05-26 21:13:40.684665656 +0200
-@@ -0,0 +1,384 @@
-+/* YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@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.
-+ *
-+ */
-+
-+const char *yaffs_checkptrw_c_version =
-+ "$Id: yaffs_checkptrw.c,v 1.11 2006/11/11 23:27:04 charles Exp $";
-+
-+
-+#include "yaffs_checkptrw.h"
++#include "yaffs_checkptrw.h"
+
+
+static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
+}
+
+
-+
+static int yaffs_CheckpointErase(yaffs_Device *dev)
+{
+
+ dev->checkpointOpenForWrite = forWriting;
+
+ dev->checkpointByteCount = 0;
++ dev->checkpointSum = 0;
++ dev->checkpointXor = 0;
+ dev->checkpointCurrentBlock = -1;
+ dev->checkpointCurrentChunk = -1;
+ dev->checkpointNextBlock = dev->internalStartBlock;
+ return 1;
+}
+
++int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
++{
++ __u32 compositeSum;
++ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
++ *sum = compositeSum;
++ return 1;
++}
++
+static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
+{
+
+
+ if(!dev->checkpointBuffer)
+ return 0;
++
++ if(!dev->checkpointOpenForWrite)
++ return -1;
+
+ while(i < nBytes && ok) {
+
+
+
-+ dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ;
++ dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ;
++ dev->checkpointSum += *dataBytes;
++ dev->checkpointXor ^= *dataBytes;
++
+ dev->checkpointByteOffset++;
+ i++;
+ dataBytes++;
+ if(!dev->checkpointBuffer)
+ return 0;
+
++ if(dev->checkpointOpenForWrite)
++ return -1;
++
+ while(i < nBytes && ok) {
+
+
+
+ if(ok){
+ *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
++ dev->checkpointSum += *dataBytes;
++ dev->checkpointXor ^= *dataBytes;
+ dev->checkpointByteOffset++;
+ i++;
+ dataBytes++;
+
+
+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_checkptrw.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_checkptrw.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_checkptrw.h 2007-05-26 21:13:40.684665656 +0200
-@@ -0,0 +1,18 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,35 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
+#ifndef __YAFFS_CHECKPTRW_H__
+#define __YAFFS_CHECKPTRW_H__
+
+
+int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes);
+
++int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
++
+int yaffs_CheckpointClose(yaffs_Device *dev);
+
+int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
+
+#endif
+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_ecc.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_ecc.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_ecc.c 2007-05-26 21:13:40.684665656 +0200
-@@ -0,0 +1,333 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,331 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * yaffs_ecc.c: ECC generation/correction algorithms.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU Lesser General Public License
-+ * version 2.1 as published by the Free Software Foundation.
++ * 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.
+ */
+
-+ /*
-+ * This code implements the ECC algorithm used in SmartMedia.
-+ *
-+ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
-+ * The two unused bit are set to 1.
-+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
-+ * blocks are used on a 512-byte NAND page.
-+ *
-+ */
++/*
++ * This code implements the ECC algorithm used in SmartMedia.
++ *
++ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
++ * The two unused bit are set to 1.
++ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
++ * blocks are used on a 512-byte NAND page.
++ *
++ */
+
+/* Table generated by gen-ecc.c
+ * Using a table means we do not have to calculate p1..p4 and p1'..p4'
+ */
+
+const char *yaffs_ecc_c_version =
-+ "$Id: yaffs_ecc.c,v 1.7 2006/09/14 22:02:46 charles Exp $";
++ "$Id: yaffs_ecc.c,v 1.9 2007-02-14 01:09:06 wookey Exp $";
+
+#include "yportenv.h"
+
+
+}
+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_ecc.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_ecc.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_ecc.h 2007-05-26 21:13:40.685665504 +0200
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h 2007-05-30 13:17:16.000000000 +0200
@@ -0,0 +1,44 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * yaffs_ecc.c: ECC generation/correction algorithms.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+ /*
+ yaffs_ECCOther * read_ecc,
+ const yaffs_ECCOther * test_ecc);
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_fs.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_fs.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_fs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_fs.c 2007-05-26 21:13:40.687665200 +0200
-@@ -0,0 +1,2136 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_fs.c linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_fs.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,2278 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_fs.c
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
++ * Acknowledgements:
++ * Luc van OostenRyck for numerous patches.
++ * Nick Bane for numerous patches.
++ * Nick Bane for 2.5/2.6 integration.
++ * Andras Toth for mknod rdev issue.
++ * Michael Fischer for finding the problem with inode inconsistency.
++ * Some code bodily lifted from JFFS
+ *
+ * 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.
++ */
++
++/*
+ *
+ * This is the file system front-end to YAFFS that hooks it up to
+ * the VFS.
+ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
+ * superblock
+ * >> inode->u.generic_ip points to the associated yaffs_Object.
-+ *
-+ * Acknowledgements:
-+ * * Luc van OostenRyck for numerous patches.
-+ * * Nick Bane for numerous patches.
-+ * * Nick Bane for 2.5/2.6 integration.
-+ * * Andras Toth for mknod rdev issue.
-+ * * Michael Fischer for finding the problem with inode inconsistency.
-+ * * Some code bodily lifted from JFFS2.
+ */
+
+const char *yaffs_fs_c_version =
-+ "$Id: yaffs_fs.c,v 1.54 2006/10/24 18:09:15 charles Exp $";
++ "$Id: yaffs_fs.c,v 1.60 2007-05-15 20:07:40 charles Exp $";
+extern const char *yaffs_guts_c_version;
+
-+#include <linux/autoconf.h>
++#include <linux/version.h>
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
++#include <linux/config.h>
++#endif
+#include <linux/kernel.h>
+#include <linux/module.h>
-+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+
+#endif
+
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++#define WRITE_SIZE_STR "writesize"
++#define WRITE_SIZE(mtd) (mtd)->writesize
++#else
++#define WRITE_SIZE_STR "oobblock"
++#define WRITE_SIZE(mtd) (mtd)->oobblock
++#endif
++
+#include <asm/uaccess.h>
+
+#include "yportenv.h"
+#include "yaffs_guts.h"
+
-+unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS |
-+ YAFFS_TRACE_BAD_BLOCKS
-+ /* | 0xFFFFFFFF */;
-+
+#include <linux/mtd/mtd.h>
+#include "yaffs_mtdif.h"
++#include "yaffs_mtdif1.h"
+#include "yaffs_mtdif2.h"
+
++unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
++unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
++
++/* Module Parameters */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
++module_param(yaffs_traceMask,uint,0644);
++module_param(yaffs_wr_attempts,uint,0644);
++#else
++MODULE_PARM(yaffs_traceMask,"i");
++MODULE_PARM(yaffs_wr_attempts,"i");
++#endif
++
+/*#define T(x) printk x */
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
-+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->i_private))
++#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
+#else
-+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
++#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
+#endif
++
++#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
+ .read = do_sync_read,
+ .write = do_sync_write,
-+ .aio_read = generic_file_aio_read,
-+ .aio_write = generic_file_aio_write,
++ .aio_read = generic_file_aio_read,
++ .aio_write = generic_file_aio_write,
+#else
+ .read = generic_file_read,
+ .write = generic_file_write,
+ * the yaffs_Object.
+ */
+ obj->myInode = NULL;
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
-+ inode->i_private = NULL;
-+#else
-+ inode->u.generic_ip = NULL;
-+#endif
++ yaffs_InodeToObjectLV(inode) = NULL;
+
+ /* If the object freeing was deferred, then the real
+ * free happens now.
+ break;
+ }
+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
-+ inode->i_private = obj;
-+#else
-+ inode->u.generic_ip = obj;
-+#endif
++ yaffs_InodeToObjectLV(inode) = obj;
++
+ obj->myInode = inode;
+
+ } else {
+}
+
+
-+
++/**
+static int yaffs_do_sync_fs(struct super_block *sb)
+{
+
+ }
+ return 0;
+}
-+
++**/
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static void yaffs_write_super(struct super_block *sb)
+
+static LIST_HEAD(yaffs_dev_list);
+
++static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ if( *flags & MS_RDONLY ) {
++ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
++
++ T(YAFFS_TRACE_OS,
++ (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushEntireDeviceCache(dev);
++
++ yaffs_CheckpointSave(dev);
++
++ if (mtd->sync)
++ mtd->sync(mtd);
++
++ yaffs_GrossUnlock(dev);
++ }
++ else {
++ T(YAFFS_TRACE_OS,
++ (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
++ }
++
++ return 0;
++}
++
+static void yaffs_put_super(struct super_block *sb)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushEntireDeviceCache(dev);
-+
++
++ yaffs_CheckpointSave(dev);
++
+ if (dev->putSuperFunc) {
+ dev->putSuperFunc(sb);
+ }
-+
-+ yaffs_CheckpointSave(dev);
++
+ yaffs_Deinitialise(dev);
+
+ yaffs_GrossUnlock(dev);
+// sb->s_dirt = 1;
+}
+
++typedef struct {
++ int inband_tags;
++ int skip_checkpoint_read;
++ int skip_checkpoint_write;
++ int no_cache;
++} yaffs_options;
++
++#define MAX_OPT_LEN 20
++static int yaffs_parse_options(yaffs_options *options, const char *options_str)
++{
++ char cur_opt[MAX_OPT_LEN+1];
++ int p;
++ int error = 0;
++
++ /* Parse through the options which is a comma seperated list */
++
++ while(options_str && *options_str && !error){
++ memset(cur_opt,0,MAX_OPT_LEN+1);
++ p = 0;
++
++ while(*options_str && *options_str != ','){
++ if(p < MAX_OPT_LEN){
++ cur_opt[p] = *options_str;
++ p++;
++ }
++ options_str++;
++ }
++
++ if(!strcmp(cur_opt,"inband-tags"))
++ options->inband_tags = 1;
++ else if(!strcmp(cur_opt,"no-cache"))
++ options->no_cache = 1;
++ else if(!strcmp(cur_opt,"no-checkpoint-read"))
++ options->skip_checkpoint_read = 1;
++ else if(!strcmp(cur_opt,"no-checkpoint-write"))
++ options->skip_checkpoint_write = 1;
++ else if(!strcmp(cur_opt,"no-checkpoint")){
++ options->skip_checkpoint_read = 1;
++ options->skip_checkpoint_write = 1;
++ } else {
++ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
++ error = 1;
++ }
++
++ }
++
++ return error;
++}
++
+static struct super_block *yaffs_internal_read_super(int yaffsVersion,
+ struct super_block *sb,
+ void *data, int silent)
+ char devname_buf[BDEVNAME_SIZE + 1];
+ struct mtd_info *mtd;
+ int err;
++ char *data_str = (char *)data;
++
++ yaffs_options options;
+
+ sb->s_magic = YAFFS_MAGIC;
+ sb->s_op = &yaffs_super_ops;
+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
+ sb->s_dev,
+ yaffs_devname(sb, devname_buf));
++
++ if(!data_str)
++ data_str = "";
++
++ printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
++
++ memset(&options,0,sizeof(options));
++
++ if(yaffs_parse_options(&options,data_str)){
++ /* Option parsing failed */
++ return NULL;
++ }
++
+
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
+ T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
+ T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ T(YAFFS_TRACE_OS, (" writesize %d\n", mtd->writesize));
-+#else
-+ T(YAFFS_TRACE_OS, (" oobblock %d\n", mtd->oobblock));
-+#endif
++ T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
+ T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
+ T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
+ T(YAFFS_TRACE_OS, (" size %d\n", mtd->size));
+ return NULL;
+ }
+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ if (mtd->writesize < YAFFS_BYTES_PER_CHUNK ||
-+#else
-+ if (mtd->oobblock < YAFFS_BYTES_PER_CHUNK ||
-+#endif
++ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
+ T(YAFFS_TRACE_ALWAYS,
+ ("yaffs: MTD device does not support have the "
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nReservedBlocks = 5;
-+ dev->nShortOpCaches = 10; /* Enable short op caching */
++ dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+
+ /* ... and the functions. */
+ if (yaffsVersion == 2) {
+#endif
+ nBlocks = mtd->size / mtd->erasesize;
+
-+ dev->nCheckpointReservedBlocks = 0;
++ dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS;
+ dev->startBlock = 0;
+ dev->endBlock = nBlocks - 1;
+ } else {
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++ /* use the MTD interface in yaffs_mtdif1.c */
++ dev->writeChunkWithTagsToNAND =
++ nandmtd1_WriteChunkWithTagsToNAND;
++ dev->readChunkWithTagsFromNAND =
++ nandmtd1_ReadChunkWithTagsFromNAND;
++ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
++ dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
++#else
+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
++#endif
+ dev->isYaffs2 = 0;
+ }
+ /* ... and common functions */
+ dev->wideTnodesDisabled = 1;
+#endif
+
++ dev->skipCheckpointRead = options.skip_checkpoint_read;
++ dev->skipCheckpointWrite = options.skip_checkpoint_write;
++
+ /* we assume this is protected by lock_kernel() in mount/umount */
+ list_add_tail(&dev->devList, &yaffs_dev_list);
+
+{
+ buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
+ buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
++ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
+ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
+ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
+ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
++ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
++ buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks);
++ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
+ buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
+ buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
+ buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
+ sprintf(buf, "passiveGCs......... %d\n",
+ dev->passiveGarbageCollections);
+ buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
++ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
+ buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
+ buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
+ buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
+/**
+ * Set the verbosity of the warnings and error messages.
+ *
++ * Note that the names can only be a..z or _ with the current code.
+ */
+
+static struct {
+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
+ {"buffers", YAFFS_TRACE_BUFFERS},
+ {"bug", YAFFS_TRACE_BUG},
++ {"checkpt", YAFFS_TRACE_CHECKPOINT},
+ {"deletion", YAFFS_TRACE_DELETION},
+ {"erase", YAFFS_TRACE_ERASE},
+ {"error", YAFFS_TRACE_ERROR},
+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
+ {"scan", YAFFS_TRACE_SCAN},
+ {"tracing", YAFFS_TRACE_TRACING},
++
++ {"verify", YAFFS_TRACE_VERIFY},
++ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
++ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
++ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
++
+ {"write", YAFFS_TRACE_WRITE},
+ {"all", 0xffffffff},
+ {"none", 0},
+ {NULL, 0},
+};
+
++#define MAX_MASK_NAME_LENGTH 40
+static int yaffs_proc_write(struct file *file, const char *buf,
+ unsigned long count, void *data)
+{
+ unsigned rg = 0, mask_bitfield;
-+ char *end, *mask_name;
++ char *end;
++ char *mask_name;
++ char *x;
++ char substring[MAX_MASK_NAME_LENGTH+1];
+ int i;
+ int done = 0;
-+ int add, len;
++ int add, len = 0;
+ int pos = 0;
+
+ rg = yaffs_traceMask;
+ break;
+ }
+ mask_name = NULL;
++
+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+ if (end > buf + pos) {
+ mask_name = "numeral";
+ len = end - (buf + pos);
+ done = 0;
+ } else {
-+
++ for(x = buf + pos, i = 0;
++ (*x == '_' || (*x >='a' && *x <= 'z')) &&
++ i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
++ substring[i] = *x;
++ substring[i] = '\0';
++
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
-+ len = strlen(mask_flags[i].mask_name);
-+ if (strncmp(buf + pos, mask_flags[i].mask_name, len) == 0) {
++ //len = strlen(mask_flags[i].mask_name);
++ //if (strncmp(buf + pos, mask_flags[i].mask_name, len) == 0) {
++ if(strcmp(substring,mask_flags[i].mask_name) == 0){
+ mask_name = mask_flags[i].mask_name;
+ mask_bitfield = mask_flags[i].mask_bitfield;
+ done = 0;
+ }
+
+ if (mask_name != NULL) {
-+ pos += len;
++ // pos += len;
+ done = 0;
+ switch(add) {
+ case '-':
+ }
+ }
+
-+ yaffs_traceMask = rg;
++ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
++
++ printk("new trace = 0x%08X\n",yaffs_traceMask);
++
+ if (rg & YAFFS_TRACE_ALWAYS) {
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+ char flag;
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
+MODULE_LICENSE("GPL");
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_guts.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_guts.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_guts.c 2007-05-26 21:13:40.730658664 +0200
-@@ -0,0 +1,6675 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.c linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,7469 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
+ */
+
+const char *yaffs_guts_c_version =
-+ "$Id: yaffs_guts.c,v 1.45 2006/11/14 03:07:17 charles Exp $";
++ "$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $";
+
+#include "yportenv.h"
+
+#include "yaffs_tagsvalidity.h"
+
+#include "yaffs_tagscompat.h"
-+#ifndef CONFIG_YAFFS_OWN_SORT
++#ifndef CONFIG_YAFFS_USE_OWN_SORT
+#include "yaffs_qsort.h"
+#endif
+#include "yaffs_nand.h"
+
+static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
+
++static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
++
+#ifdef YAFFS_PARANOID
+static int yaffs_CheckFileSanity(yaffs_Object * in);
+#else
+
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
+
++static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
++ yaffs_ExtendedTags * tags);
++
++static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
++static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
++ yaffs_FileStructure * fStruct,
++ __u32 chunkId);
+
+
+/* Function to calculate chunk and offset */
+ * Temporary buffer manipulations.
+ */
+
-+static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
++static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
+{
-+ int i, j;
++ int i;
++ __u8 *buf = (__u8 *)1;
++
++ memset(dev->tempBuffer,0,sizeof(dev->tempBuffer));
++
++ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
++ dev->tempBuffer[i].line = 0; /* not in use */
++ dev->tempBuffer[i].buffer = buf =
++ YMALLOC_DMA(dev->nDataBytesPerChunk);
++ }
++
++ return buf ? YAFFS_OK : YAFFS_FAIL;
++
++}
++
++static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
++{
++ int i, j;
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ if (dev->tempBuffer[i].line == 0) {
+ dev->tempBuffer[i].line = lineNo;
+ return 0;
+}
+
++
++
+/*
+ * Chunk bitmap manipulations
+ */
+ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+}
+
++static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
++{
++ if(blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
++ chunk < 0 || chunk >= dev->nChunksPerBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk));
++ YBUG();
++ }
++}
++
+static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
++ yaffs_VerifyChunkBitId(dev,blk,chunk);
++
+ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
+}
+
+static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev,blk,chunk);
+
+ blkBits[chunk / 8] |= (1 << (chunk & 7));
+}
+static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ yaffs_VerifyChunkBitId(dev,blk,chunk);
++
+ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
+}
+
+ return 0;
+}
+
-+/*
-+ * Simple hash function. Needs to have a reasonable spread
-+ */
-+
-+static Y_INLINE int yaffs_HashFunction(int n)
++static int yaffs_CountChunkBits(yaffs_Device * dev, int blk)
+{
-+ n = abs(n);
-+ return (n % YAFFS_NOBJECT_BUCKETS);
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ int n = 0;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ __u8 x = *blkBits;
++ while(x){
++ if(x & 1)
++ n++;
++ x >>=1;
++ }
++
++ blkBits++;
++ }
++ return n;
+}
+
-+/*
-+ * Access functions to useful fake objects
++/*
++ * Verification code
+ */
+
-+yaffs_Object *yaffs_Root(yaffs_Device * dev)
++static int yaffs_SkipVerification(yaffs_Device *dev)
+{
-+ return dev->rootDir;
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+}
+
-+yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
++static int yaffs_SkipFullVerification(yaffs_Device *dev)
+{
-+ return dev->lostNFoundDir;
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
+}
+
++static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++{
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++}
+
-+/*
-+ * Erased NAND checking functions
-+ */
-+
-+int yaffs_CheckFF(__u8 * buffer, int nBytes)
++static const char * blockStateName[] = {
++"Unknown",
++"Needs scanning",
++"Scanning",
++"Empty",
++"Allocating",
++"Full",
++"Dirty",
++"Checkpoint",
++"Collecting",
++"Dead"
++};
++
++static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
+{
-+ /* Horrible, slow implementation */
-+ while (nBytes--) {
-+ if (*buffer != 0xFF)
-+ return 0;
-+ buffer++;
++ int actuallyUsed;
++ int inUse;
++
++ if(yaffs_SkipVerification(dev))
++ return;
++
++ /* Report illegal runtime states */
++ if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState));
++
++ switch(bi->blockState){
++ case YAFFS_BLOCK_STATE_UNKNOWN:
++ case YAFFS_BLOCK_STATE_SCANNING:
++ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR),
++ n,blockStateName[bi->blockState]));
+ }
-+ return 1;
++
++ /* Check pages in use and soft deletions are legal */
++
++ actuallyUsed = bi->pagesInUse - bi->softDeletions;
++
++ if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
++ bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
++ actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
++ n,bi->pagesInUse,bi->softDeletions));
++
++
++ /* Check chunk bitmap legal */
++ inUse = yaffs_CountChunkBits(dev,n);
++ if(inUse != bi->pagesInUse)
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
++ n,bi->pagesInUse,inUse));
++
++ /* Check that the sequence number is valid.
++ * Ten million is legal, but is very unlikely
++ */
++ if(dev->isYaffs2 &&
++ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
++ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 ))
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR),
++ n,bi->sequenceNumber));
++
+}
+
-+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
-+ int chunkInNAND)
++static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
+{
++ yaffs_VerifyBlock(dev,bi,n);
++
++ /* After collection the block should be in the erased state */
++ /* TODO: This will need to change if we do partial gc */
++
++ if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){
++ T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
++ n,bi->blockState));
++ }
++}
+
-+ int retval = YAFFS_OK;
-+ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
-+ yaffs_ExtendedTags tags;
-+ int result;
-+
-+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
++static void yaffs_VerifyBlocks(yaffs_Device *dev)
++{
++ int i;
++ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
++ int nIllegalBlockStates = 0;
+
-+ if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
-+ retval = YAFFS_FAIL;
++
++ if(yaffs_SkipVerification(dev))
++ return;
++
++ memset(nBlocksPerState,0,sizeof(nBlocksPerState));
++
+
++ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
++ yaffs_VerifyBlock(dev,bi,i);
+
-+ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
-+ T(YAFFS_TRACE_NANDACCESS,
-+ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
-+ retval = YAFFS_FAIL;
++ if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
++ nBlocksPerState[bi->blockState]++;
++ else
++ nIllegalBlockStates++;
++
+ }
++
++ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
++ T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR)));
++
++ T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates));
++ if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
++ T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR)));
+
-+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++ for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("%s %d blocks"TENDSTR),
++ blockStateName[i],nBlocksPerState[i]));
++
++ if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
++ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++
++ if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
++ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++
++ if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
++ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
+
-+ return retval;
++ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR)));
+
+}
+
-+static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
-+ const __u8 * data,
-+ yaffs_ExtendedTags * tags,
-+ int useReserve)
++/*
++ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
++ * case those tests will not be performed.
++ */
++static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
+{
-+ int chunk;
++ if(yaffs_SkipVerification(obj->myDev))
++ return;
++
++ if(!(tags && obj && oh)){
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
++ (__u32)tags,(__u32)obj,(__u32)oh));
++ return;
++ }
++
++ if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
++ oh->type > YAFFS_OBJECT_TYPE_MAX)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
++ tags->objectId, oh->type));
+
-+ int writeOk = 0;
-+ int erasedOk = 1;
-+ int attempts = 0;
-+ yaffs_BlockInfo *bi;
++ if(tags->objectId != obj->objectId)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
++ tags->objectId, obj->objectId));
++
++
++ /*
++ * Check that the object's parent ids match if parentCheck requested.
++ *
++ * Tests do not apply to the root object.
++ */
+
-+ yaffs_InvalidateCheckpoint(dev);
++ if(parentCheck && tags->objectId > 1 && !obj->parent)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
++ tags->objectId, oh->parentObjectId));
++
++
++ if(parentCheck && obj->parent &&
++ oh->parentObjectId != obj->parent->objectId &&
++ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
++ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
++ tags->objectId, oh->parentObjectId, obj->parent->objectId));
++
++
++ if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is NULL"TENDSTR),
++ obj->objectId));
+
-+ do {
-+ chunk = yaffs_AllocateChunk(dev, useReserve,&bi);
-+
-+ if (chunk >= 0) {
-+ /* First check this chunk is erased, if it needs checking.
-+ * The checking policy (unless forced always on) is as follows:
-+ * Check the first page we try to write in a block.
-+ * - If the check passes then we don't need to check any more.
-+ * - If the check fails, we check again...
-+ * If the block has been erased, we don't need to check.
-+ *
-+ * However, if the block has been prioritised for gc, then
-+ * we think there might be something odd about this block
-+ * and stop using it.
-+ *
-+ * Rationale:
-+ * We should only ever see chunks that have not been erased
-+ * if there was a partially written chunk due to power loss
-+ * This checking policy should catch that case with very
-+ * few checks and thus save a lot of checks that are most likely not
-+ * needed.
-+ */
-+
-+ if(bi->gcPrioritise){
-+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
-+ } else {
-+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is 0xFF"TENDSTR),
++ obj->objectId));
++}
+
-+ bi->skipErasedCheck = 0;
+
-+#endif
-+ if(!bi->skipErasedCheck){
-+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
-+ if(erasedOk && !bi->gcPrioritise)
-+ bi->skipErasedCheck = 1;
-+ }
+
-+ if (!erasedOk) {
-+ T(YAFFS_TRACE_ERROR,
-+ (TSTR
-+ ("**>> yaffs chunk %d was not erased"
-+ TENDSTR), chunk));
-+ } else {
-+ writeOk =
-+ yaffs_WriteChunkWithTagsToNAND(dev, chunk,
-+ data, tags);
++static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ yaffs_Device *dev = obj->myDev;
++ int ok = 1;
++ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
++ if (tn->internal[i]) {
++ ok = yaffs_VerifyTnodeWorker(obj,
++ tn->internal[i],
++ level - 1,
++ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
++ }
++ } else if (level == 0) {
++ int i;
++ yaffs_ExtendedTags tags;
++ __u32 objectId = obj->objectId;
+
-+ attempts++;
-+
-+ if (writeOk) {
-+ /*
-+ * Copy the data into the robustification buffer.
-+ * NB We do this at the end to prevent duplicates in the case of a write error.
-+ * Todo
-+ */
-+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
++ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
++
++ for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+
-+ } else {
-+ /* The erased check or write failed */
-+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
++ if(theChunk > 0){
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
++ if(tags.objectId != objectId || tags.chunkId != chunkOffset){
++ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, chunkOffset, theChunk,
++ tags.objectId, tags.chunkId));
++ }
+ }
++ chunkOffset++;
+ }
+ }
-+
-+ } while (chunk >= 0 && !writeOk);
-+
-+ if (attempts > 1) {
-+ T(YAFFS_TRACE_ERROR,
-+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
-+ attempts));
-+ dev->nRetriedWrites += (attempts - 1);
+ }
+
-+ return chunk;
++ return ok;
++
+}
+
-+/*
-+ * Block retiring for handling a broken block.
-+ */
-+
-+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
-+{
-+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
-+ yaffs_InvalidateCheckpoint(dev);
++static void yaffs_VerifyFile(yaffs_Object *obj)
++{
++ int requiredTallness;
++ int actualTallness;
++ __u32 lastChunk;
++ __u32 x;
++ __u32 i;
++ int ok;
++ yaffs_Device *dev;
++ yaffs_ExtendedTags tags;
++ yaffs_Tnode *tn;
++ __u32 objectId;
+
-+ yaffs_MarkBlockBad(dev, blockInNAND);
++ if(obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ dev = obj->myDev;
++ objectId = obj->objectId;
++
++ /* Check file size is consistent with tnode depth */
++ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
++ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x> 0) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++ actualTallness = obj->variant.fileVariant.topLevel;
++
++ if(requiredTallness > actualTallness )
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
++ obj->objectId,actualTallness, requiredTallness));
++
++
++ /* Check that the chunks in the tnode tree are all correct.
++ * We do this by scanning through the tnode tree and
++ * checking the tags for every chunk match.
++ */
+
-+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
-+ bi->gcPrioritise = 0;
-+ bi->needsRetiring = 0;
++ if(yaffs_SkipNANDVerification(dev))
++ return;
++
++ for(i = 1; i <= lastChunk; i++){
++ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i);
+
-+ dev->nRetiredBlocks++;
-+}
++ if (tn) {
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
++ if(theChunk > 0){
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
++ if(tags.objectId != objectId || tags.chunkId != i){
++ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, i, theChunk,
++ tags.objectId, tags.chunkId));
++ }
++ }
++ }
++
++ }
+
-+/*
-+ * Functions for robustisizing TODO
-+ *
-+ */
-+
-+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
-+ const __u8 * data,
-+ const yaffs_ExtendedTags * tags)
-+{
+}
+
-+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
-+ const yaffs_ExtendedTags * tags)
++static void yaffs_VerifyDirectory(yaffs_Object *obj)
+{
++ if(obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
+}
+
-+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
++static void yaffs_VerifyHardLink(yaffs_Object *obj)
+{
-+ if(!bi->gcPrioritise){
-+ bi->gcPrioritise = 1;
-+ dev->hasPendingPrioritisedGCs = 1;
-+ bi->chunkErrorStrikes ++;
-+
-+ if(bi->chunkErrorStrikes > 3){
-+ bi->needsRetiring = 1; /* Too many stikes, so retire this */
-+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
-+
-+ }
++ if(obj && yaffs_SkipVerification(obj->myDev))
++ return;
+
-+ }
++ /* Verify sane equivalent object */
+}
+
-+static void yaffs_ReportOddballBlocks(yaffs_Device *dev)
++static void yaffs_VerifySymlink(yaffs_Object *obj)
+{
-+ int i;
-+
-+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock && (yaffs_traceMask & YAFFS_TRACE_BAD_BLOCKS); i++){
-+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
-+ if(bi->needsRetiring || bi->gcPrioritise)
-+ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("yaffs block %d%s%s" TENDSTR),
-+ i,
-+ bi->needsRetiring ? " needs retiring" : "",
-+ bi->gcPrioritise ? " gc prioritised" : ""));
++ if(obj && yaffs_SkipVerification(obj->myDev))
++ return;
+
-+ }
++ /* Verify symlink string */
+}
+
-+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
++static void yaffs_VerifySpecial(yaffs_Object *obj)
+{
++ if(obj && yaffs_SkipVerification(obj->myDev))
++ return;
++}
+
-+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
-+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-+
-+ yaffs_HandleChunkError(dev,bi);
-+
++static void yaffs_VerifyObject(yaffs_Object *obj)
++{
++ yaffs_Device *dev;
+
-+ if(erasedOk ) {
-+ /* Was an actual write failure, so mark the block for retirement */
++ __u32 chunkMin;
++ __u32 chunkMax;
++
++ __u32 chunkIdOk;
++ __u32 chunkIsLive;
++
++ if(!obj)
++ return;
++
++ dev = obj->myDev;
++
++ if(yaffs_SkipVerification(dev))
++ return;
++
++ /* Check sane object header chunk */
++
++ chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
++ chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
++
++ chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax);
++ chunkIsLive = chunkIdOk &&
++ yaffs_CheckChunkBit(dev,
++ obj->chunkId / dev->nChunksPerBlock,
++ obj->chunkId % dev->nChunksPerBlock);
++ if(!obj->fake &&
++ (!chunkIdOk || !chunkIsLive)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
++ obj->objectId,obj->chunkId,
++ chunkIdOk ? "" : ",out of range",
++ chunkIsLive || !chunkIdOk ? "" : ",marked as deleted"));
++ }
++
++ if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) {
++ yaffs_ExtendedTags tags;
++ yaffs_ObjectHeader *oh;
++ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
++
++ oh = (yaffs_ObjectHeader *)buffer;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags);
++
++ yaffs_VerifyObjectHeader(obj,oh,&tags,1);
++
++ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
++ }
++
++ /* Verify it has a parent */
++ if(obj && !obj->fake &&
++ (!obj->parent || obj->parent->myDev != dev)){
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
++ obj->objectId,obj->parent));
++ }
++
++ /* Verify parent is a directory */
++ if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
++ obj->objectId,obj->parent->variantType));
++ }
++
++ switch(obj->variantType){
++ case YAFFS_OBJECT_TYPE_FILE:
++ yaffs_VerifyFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ yaffs_VerifySymlink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ yaffs_VerifyDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ yaffs_VerifyHardLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ yaffs_VerifySpecial(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has illegaltype %d"TENDSTR),
++ obj->objectId,obj->variantType));
++ break;
++ }
++
++
++}
++
++static void yaffs_VerifyObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ int i;
++ struct list_head *lh;
++
++ if(yaffs_SkipVerification(dev))
++ return;
++
++ /* Iterate through the objects in each hash entry */
++
++ for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){
++ list_for_each(lh, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = list_entry(lh, yaffs_Object, hashLink);
++ yaffs_VerifyObject(obj);
++ }
++ }
++ }
++
++}
++
++
++/*
++ * Simple hash function. Needs to have a reasonable spread
++ */
++
++static Y_INLINE int yaffs_HashFunction(int n)
++{
++ n = abs(n);
++ return (n % YAFFS_NOBJECT_BUCKETS);
++}
++
++/*
++ * Access functions to useful fake objects
++ */
++
++yaffs_Object *yaffs_Root(yaffs_Device * dev)
++{
++ return dev->rootDir;
++}
++
++yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
++{
++ return dev->lostNFoundDir;
++}
++
++
++/*
++ * Erased NAND checking functions
++ */
++
++int yaffs_CheckFF(__u8 * buffer, int nBytes)
++{
++ /* Horrible, slow implementation */
++ while (nBytes--) {
++ if (*buffer != 0xFF)
++ return 0;
++ buffer++;
++ }
++ return 1;
++}
++
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND)
++{
++
++ int retval = YAFFS_OK;
++ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ExtendedTags tags;
++ int result;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
++
++ if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
++ retval = YAFFS_FAIL;
++
++
++ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
++ retval = YAFFS_FAIL;
++ }
++
++ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
++
++ return retval;
++
++}
++
++
++static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
++ const __u8 * data,
++ yaffs_ExtendedTags * tags,
++ int useReserve)
++{
++ int attempts = 0;
++ int writeOk = 0;
++ int chunk;
++
++ yaffs_InvalidateCheckpoint(dev);
++
++ do {
++ yaffs_BlockInfo *bi = 0;
++ int erasedOk = 0;
++
++ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
++ if (chunk < 0) {
++ /* no space */
++ break;
++ }
++
++ /* First check this chunk is erased, if it needs
++ * checking. The checking policy (unless forced
++ * always on) is as follows:
++ *
++ * Check the first page we try to write in a block.
++ * If the check passes then we don't need to check any
++ * more. If the check fails, we check again...
++ * If the block has been erased, we don't need to check.
++ *
++ * However, if the block has been prioritised for gc,
++ * then we think there might be something odd about
++ * this block and stop using it.
++ *
++ * Rationale: We should only ever see chunks that have
++ * not been erased if there was a partially written
++ * chunk due to power loss. This checking policy should
++ * catch that case with very few checks and thus save a
++ * lot of checks that are most likely not needed.
++ */
++ if (bi->gcPrioritise) {
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++ /* try another chunk */
++ continue;
++ }
++
++ /* let's give it a try */
++ attempts++;
++
++#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ bi->skipErasedCheck = 0;
++#endif
++ if (!bi->skipErasedCheck) {
++ erasedOk = yaffs_CheckChunkErased(dev, chunk);
++ if (erasedOk != YAFFS_OK) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR ("**>> yaffs chunk %d was not erased"
++ TENDSTR), chunk));
++
++ /* try another chunk */
++ continue;
++ }
++ bi->skipErasedCheck = 1;
++ }
++
++ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
++ data, tags);
++ if (writeOk != YAFFS_OK) {
++ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
++ /* try another chunk */
++ continue;
++ }
++
++ /* Copy the data into the robustification buffer */
++ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
++
++ } while (writeOk != YAFFS_OK && attempts < yaffs_wr_attempts);
++
++ if (attempts > 1) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
++ attempts));
++
++ dev->nRetriedWrites += (attempts - 1);
++ }
++
++ return chunk;
++}
++
++/*
++ * Block retiring for handling a broken block.
++ */
++
++static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
++{
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++
++ yaffs_InvalidateCheckpoint(dev);
++
++ yaffs_MarkBlockBad(dev, blockInNAND);
++
++ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++ bi->gcPrioritise = 0;
++ bi->needsRetiring = 0;
++
++ dev->nRetiredBlocks++;
++}
++
++/*
++ * Functions for robustisizing TODO
++ *
++ */
++
++static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
++ const __u8 * data,
++ const yaffs_ExtendedTags * tags)
++{
++}
++
++static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
++ const yaffs_ExtendedTags * tags)
++{
++}
++
++void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
++{
++ if(!bi->gcPrioritise){
++ bi->gcPrioritise = 1;
++ dev->hasPendingPrioritisedGCs = 1;
++ bi->chunkErrorStrikes ++;
++
++ if(bi->chunkErrorStrikes > 3){
++ bi->needsRetiring = 1; /* Too many stikes, so retire this */
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
++
++ }
++
++ }
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
++{
++
++ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
++
++ yaffs_HandleChunkError(dev,bi);
++
++
++ if(erasedOk ) {
++ /* Was an actual write failure, so mark the block for retirement */
+ bi->needsRetiring = 1;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
+
+ YUCHAR *bname = (YUCHAR *) name;
+ if (bname) {
-+ while ((*bname) && (i <= YAFFS_MAX_NAME_LENGTH)) {
++ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
+
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+ sum += yaffs_toupper(*bname) * i;
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
++ return YAFFS_FAIL;
+
+ } else {
+ tnl->tnodes = newTnodes;
+ }
+}
+
-+__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos)
++static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+
+ /* make these things */
+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
++ list = YMALLOC(sizeof(yaffs_ObjectList));
+
-+ if (!newObjects) {
++ if (!newObjects || !list) {
++ if(newObjects)
++ YFREE(newObjects);
++ if(list)
++ YFREE(list);
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ return YAFFS_FAIL;
+
+ /* Now add this bunch of Objects to a list for freeing up. */
+
-+ list = YMALLOC(sizeof(yaffs_ObjectList));
-+ if (!list) {
-+ T(YAFFS_TRACE_ALLOCATE,
-+ (TSTR("Could not add objects to management list" TENDSTR)));
-+ } else {
-+ list->objects = newObjects;
-+ list->next = dev->allocatedObjectList;
-+ dev->allocatedObjectList = list;
-+ }
++ list->objects = newObjects;
++ list->next = dev->allocatedObjectList;
++ dev->allocatedObjectList = list;
+
+ return YAFFS_OK;
+}
+{
+
+ yaffs_Object *theObject;
++ yaffs_Tnode *tn;
+
+ if (number < 0) {
+ number = yaffs_CreateNewObjectNumber(dev);
+ }
+
+ theObject = yaffs_AllocateEmptyObject(dev);
++ if(!theObject)
++ return NULL;
++
++ if(type == YAFFS_OBJECT_TYPE_FILE){
++ tn = yaffs_GetTnode(dev);
++ if(!tn){
++ yaffs_FreeObject(theObject);
++ return NULL;
++ }
++ }
++
++
+
+ if (theObject) {
+ theObject->fake = 0;
+ theObject->variant.fileVariant.scannedFileSize = 0;
+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+ theObject->variant.fileVariant.topLevel = 0;
-+ theObject->variant.fileVariant.top =
-+ yaffs_GetTnode(dev);
++ theObject->variant.fileVariant.top = tn;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ INIT_LIST_HEAD(&theObject->variant.directoryVariant.
+
+ if (str && *str) {
+ newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
-+ yaffs_strcpy(newStr, str);
++ if(newStr)
++ yaffs_strcpy(newStr, str);
+ }
+
+ return newStr;
+ const YCHAR * aliasString, __u32 rdev)
+{
+ yaffs_Object *in;
++ YCHAR *str;
+
+ yaffs_Device *dev = parent->myDev;
+
+ }
+
+ in = yaffs_CreateNewObject(dev, -1, type);
++
++ if(type == YAFFS_OBJECT_TYPE_SYMLINK){
++ str = yaffs_CloneString(aliasString);
++ if(!str){
++ yaffs_FreeObject(in);
++ return NULL;
++ }
++ }
++
++
+
+ if (in) {
+ in->chunkId = -1;
+
+ switch (type) {
+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symLinkVariant.alias =
-+ yaffs_CloneString(aliasString);
++ in->variant.symLinkVariant.alias = str;
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.equivalentObject =
+{
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+
++ dev->blockInfo = NULL;
++ dev->chunkBits = NULL;
++
+ dev->allocationBlock = -1; /* force it to get a new one */
+
-+ /* Todo we're assuming the malloc will pass. */
++ /* If the first allocation strategy fails, thry the alternate one */
+ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+ if(!dev->blockInfo){
+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+ }
+ else
+ dev->blockInfoAlt = 0;
++
++ if(dev->blockInfo){
+
-+ /* Set up dynamic blockinfo stuff. */
-+ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
-+ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
-+ if(!dev->chunkBits){
-+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
-+ dev->chunkBitsAlt = 1;
++ /* Set up dynamic blockinfo stuff. */
++ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
++ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
++ if(!dev->chunkBits){
++ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
++ dev->chunkBitsAlt = 1;
++ }
++ else
++ dev->chunkBitsAlt = 0;
+ }
-+ else
-+ dev->chunkBitsAlt = 0;
+
+ if (dev->blockInfo && dev->chunkBits) {
+ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+
+static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
+{
-+ if(dev->blockInfoAlt)
++ if(dev->blockInfoAlt && dev->blockInfo)
+ YFREE_ALT(dev->blockInfo);
-+ else
++ else if(dev->blockInfo)
+ YFREE(dev->blockInfo);
++
+ dev->blockInfoAlt = 0;
+
+ dev->blockInfo = NULL;
+
-+ if(dev->chunkBitsAlt)
++ if(dev->chunkBitsAlt && dev->chunkBits)
+ YFREE_ALT(dev->chunkBits);
-+ else
++ else if(dev->chunkBits)
+ YFREE(dev->chunkBits);
+ dev->chunkBitsAlt = 0;
+ dev->chunkBits = NULL;
+ int i;
+ int iterations;
+ int dirtiest = -1;
-+ int pagesInUse;
++ int pagesInUse = 0;
+ int prioritised=0;
+ yaffs_BlockInfo *bi;
-+ static int nonAggressiveSkip = 0;
+ int pendingPrioritisedExist = 0;
+
+ /* First let's see if we need to grab a prioritised block */
+ for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){
+
+ bi = yaffs_GetBlockInfo(dev, i);
++ //yaffs_VerifyBlock(dev,bi,i);
++
+ if(bi->gcPrioritise) {
+ pendingPrioritisedExist = 1;
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ * block has only a few pages in use.
+ */
+
-+ nonAggressiveSkip--;
++ dev->nonAggressiveSkip--;
+
-+ if (!aggressive && (nonAggressiveSkip > 0)) {
++ if (!aggressive && (dev->nonAggressiveSkip > 0)) {
+ return -1;
+ }
+
+ dev->oldestDirtySequence = 0;
+
+ if (dirtiest > 0) {
-+ nonAggressiveSkip = 4;
++ dev->nonAggressiveSkip = 4;
+ }
+
+ return dirtiest;
+ }
+ }
+
-+ if (erasedOk && (yaffs_traceMask & YAFFS_TRACE_ERASE)) {
++ if (erasedOk &&
++ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+ int i;
+ for (i = 0; i < dev->nChunksPerBlock; i++) {
+ if (!yaffs_CheckChunkErased
+ int cleanups = 0;
+ int i;
+ int isCheckpointBlock;
++ int matchingChunk;
+
+ int chunksBefore = yaffs_GetErasedChunks(dev);
+ int chunksAfter;
+ } else {
+
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ yaffs_VerifyBlock(dev,bi,block);
+
+ for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock;
+ chunkInBlock < dev->nChunksPerBlock
+ ("Collecting page %d, %d %d %d " TENDSTR),
+ chunkInBlock, tags.objectId, tags.chunkId,
+ tags.byteCount));
++
++ if(object && !yaffs_SkipVerification(dev)){
++ if(tags.chunkId == 0)
++ matchingChunk = object->chunkId;
++ else if(object->softDeleted)
++ matchingChunk = oldChunk; /* Defeat the test */
++ else
++ matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL);
++
++ if(oldChunk != matchingChunk)
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
++ oldChunk,matchingChunk,tags.objectId, tags.chunkId));
++
++ }
+
+ if (!object) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
-+ ("page %d in gc has no object "
-+ TENDSTR), oldChunk));
++ ("page %d in gc has no object: %d %d %d "
++ TENDSTR), oldChunk,
++ tags.objectId, tags.chunkId, tags.byteCount));
+ }
+
+ if (object && object->deleted
+ oh->shadowsObject = -1;
+ tags.extraShadows = 0;
+ tags.extraIsShrinkHeader = 0;
++
++ yaffs_VerifyObjectHeader(object,oh,&tags,1);
+ }
+
+ newChunk =
+
+ }
+
++ yaffs_VerifyCollectedBlock(dev,bi,block);
++
+ if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ if(checkpointBlockAdjust < 0)
+ checkpointBlockAdjust = 0;
+
-+ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust)) {
++ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
+ /* We need a block soon...*/
+ aggressive = 1;
+ } else {
+
+ if (chunkId <= 0)
+ return;
++
+
+ dev->nDeletions++;
+ block = chunkId / dev->nChunksPerBlock;
+ page = chunkId % dev->nChunksPerBlock;
+
++
++ if(!yaffs_CheckChunkBit(dev,block,page))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Deleting invalid chunk %d"TENDSTR),
++ chunkId));
++
+ bi = yaffs_GetBlockInfo(dev, block);
+
+ T(YAFFS_TRACE_DELETION,
+
+ int newChunkId;
+ yaffs_ExtendedTags newTags;
++ yaffs_ExtendedTags oldTags;
+
+ __u8 *buffer = NULL;
+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+
+ yaffs_ObjectHeader *oh = NULL;
++
++ yaffs_strcpy(oldName,"silly old name");
+
+ if (!in->fake || force) {
+
+ yaffs_CheckGarbageCollection(dev);
++ yaffs_CheckObjectDetailsLoaded(in);
+
+ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+ oh = (yaffs_ObjectHeader *) buffer;
+
+ if (prevChunkId >= 0) {
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
-+ buffer, NULL);
++ buffer, &oldTags);
++
++ yaffs_VerifyObjectHeader(in,oh,&oldTags,0);
++
+ memcpy(oldName, oh->name, sizeof(oh->name));
+ }
+
+ if (name && *name) {
+ memset(oh->name, 0, sizeof(oh->name));
+ yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
-+ } else if (prevChunkId) {
++ } else if (prevChunkId>=0) {
+ memcpy(oh->name, oldName, sizeof(oh->name));
+ } else {
+ memset(oh->name, 0, sizeof(oh->name));
+ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+ newTags.extraObjectType = in->variantType;
+
++ yaffs_VerifyObjectHeader(in,oh,&newTags,1);
++
+ /* Create new chunk in NAND */
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head)
+{
+ yaffs_CheckpointValidity cp;
++
++ memset(&cp,0,sizeof(cp));
++
+ cp.structType = sizeof(cp);
+ cp.magic = YAFFS_MAGIC;
+ cp.version = YAFFS_CHECKPOINT_VERSION;
+ yaffs_Device *dev = obj->myDev;
+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+ yaffs_Tnode *tn;
++ int nread = 0;
+
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+
+ while(ok && (~baseChunk)){
++ nread++;
+ /* Read level 0 tnode */
+
++
+ /* printf("read tnode at %d\n",baseChunk); */
+ tn = yaffs_GetTnodeRaw(dev);
+ if(tn)
+ fileStructPtr,
+ baseChunk,
+ tn) ? 1 : 0;
++
+ }
+
+ if(ok)
+
+ }
+
++ T(YAFFS_TRACE_CHECKPOINT,(
++ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
++ nread,baseChunk,ok));
++
+ return ok ? 1 : 0;
+}
+
+ while(ok && !done) {
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+ if(cp.structType != sizeof(cp)) {
-+ /* printf("structure parsing failed\n"); */
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR),
++ cp.structType,sizeof(cp),ok));
+ ok = 0;
+ }
+
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
++ cp.objectId,cp.parentId,cp.variantType,cp.chunkId));
++
+ if(ok && cp.objectId == ~0)
+ done = 1;
+ else if(ok){
+ obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
-+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
-+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj));
+ if(obj) {
+ yaffs_CheckpointObjectToObject(obj,&cp);
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ return ok ? 1 : 0;
+}
+
-+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
++static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
+{
++ __u32 checkpointSum;
++ int ok;
++
++ yaffs_GetCheckpointSum(dev,&checkpointSum);
++
++ ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum));
++
++ if(!ok)
++ return 0;
++
++ return 1;
++}
+
++static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
++{
++ __u32 checkpointSum0;
++ __u32 checkpointSum1;
+ int ok;
+
-+ ok = yaffs_CheckpointOpen(dev,1);
++ yaffs_GetCheckpointSum(dev,&checkpointSum0);
++
++ ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+
++ if(!ok)
++ return 0;
++
++ if(checkpointSum0 != checkpointSum1)
++ return 0;
++
++ return 1;
++}
++
++
++static int yaffs_WriteCheckpointData(yaffs_Device *dev)
++{
++
++ int ok = 1;
++
++ if(dev->skipCheckpointWrite || !dev->isYaffs2){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR)));
++ ok = 0;
++ }
++
+ if(ok)
++ ok = yaffs_CheckpointOpen(dev,1);
++
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs_WriteCheckpointValidityMarker(dev,1);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR)));
+ ok = yaffs_WriteCheckpointDevice(dev);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR)));
+ ok = yaffs_WriteCheckpointObjects(dev);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs_WriteCheckpointValidityMarker(dev,0);
-+
++ }
++
++ if(ok){
++ ok = yaffs_WriteCheckpointSum(dev);
++ }
++
++
+ if(!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+{
-+ int ok;
++ int ok = 1;
+
-+ ok = yaffs_CheckpointOpen(dev,0); /* open for read */
++ if(dev->skipCheckpointRead || !dev->isYaffs2){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR)));
++ ok = 0;
++ }
+
+ if(ok)
++ ok = yaffs_CheckpointOpen(dev,0); /* open for read */
++
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
+ ok = yaffs_ReadCheckpointValidityMarker(dev,1);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR)));
+ ok = yaffs_ReadCheckpointDevice(dev);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR)));
+ ok = yaffs_ReadCheckpointObjects(dev);
-+ if(ok)
++ }
++ if(ok){
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR)));
+ ok = yaffs_ReadCheckpointValidityMarker(dev,0);
-+
-+
++ }
++
++ if(ok){
++ ok = yaffs_ReadCheckpointSum(dev);
++ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok));
++ }
+
+ if(!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+int yaffs_CheckpointSave(yaffs_Device *dev)
+{
-+ yaffs_ReportOddballBlocks(dev);
++
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
-+ if(!dev->isCheckpointed)
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++
++ if(!dev->isCheckpointed) {
++ yaffs_InvalidateCheckpoint(dev);
+ yaffs_WriteCheckpointData(dev);
++ }
+
-+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
++ T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
+ return dev->isCheckpointed;
+}
+{
+ int retval;
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
-+
++
+ retval = yaffs_ReadCheckpointData(dev);
+
++ if(dev->isCheckpointed){
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++ }
++
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
-+ yaffs_ReportOddballBlocks(dev);
-+
+ return retval;
+}
+
+ int newFullChunks;
+
+ yaffs_Device *dev = in->myDev;
-+
++
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
+
+ yaffs_FlushFilesChunkCache(in);
+ in->variant.fileVariant.fileSize = newSize;
+
+ yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
++ } else {
++ /* newsSize > oldFileSize */
++ in->variant.fileVariant.fileSize = newSize;
+ }
++
++
++
+ /* Write a new object header.
+ * show we've shrunk the file, if need be
+ * Do this only if the file is not in the deleted directories.
+
+ if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
+ /* Move to the unlinked directory so we have a record that it was deleted. */
-+ yaffs_ChangeObjectName(in, in->myDev->deletedDir, NULL, 0, 0);
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0);
+
+ }
+
+ if (immediateDeletion) {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
-+ NULL, 0, 0);
++ "deleted", 0, 0);
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+ in->objectId));
+ } else {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
-+ NULL, 0, 0);
++ "unlinked", 0, 0);
+ }
+
+ }
+ int deleted;
+ yaffs_BlockState state;
+ yaffs_Object *hardList = NULL;
-+ yaffs_Object *hl;
+ yaffs_BlockInfo *bi;
+ int sequenceNumber;
+ yaffs_ObjectHeader *oh;
+ yaffs_Object *in;
+ yaffs_Object *parent;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++
++ int alloc_failed = 0;
++
+
+ __u8 *chunkData;
+
+
+ if (dev->isYaffs2) {
+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++ if(!blockIndex)
++ return YAFFS_FAIL;
+ }
+
+ /* Scan all the blocks to determine their state */
+ }
+
+ /* For each block.... */
-+ for (blockIterator = startIterator; blockIterator <= endIterator;
++ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
+ blockIterator++) {
+
+ if (dev->isYaffs2) {
+ deleted = 0;
+
+ /* For each chunk in each block that needs scanning....*/
-+ for (c = 0; c < dev->nChunksPerBlock &&
++ for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
+ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
+ /* Read the tags and decide what to do */
+ chunk = blk * dev->nChunksPerBlock + c;
+ /* PutChunkIntoFile checks for a clash (two data chunks with
+ * the same chunkId).
+ */
-+ yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,
-+ 1);
++
++ if(!in)
++ alloc_failed = 1;
++
++ if(in){
++ if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1))
++ alloc_failed = 1;
++ }
++
+ endpos =
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
+ tags.byteCount;
-+ if (in->variantType == YAFFS_OBJECT_TYPE_FILE
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
+ && in->variant.fileVariant.scannedFileSize <
+ endpos) {
+ in->variant.fileVariant.
+ objectId,
+ oh->type);
+
-+ if (oh->shadowsObject > 0) {
++ if(!in)
++ alloc_failed = 1;
++
++ if (in && oh->shadowsObject > 0) {
+ yaffs_HandleShadowedObject(dev,
+ oh->
+ shadowsObject,
+ 0);
+ }
+
-+ if (in->valid) {
++ if (in && in->valid) {
+ /* We have already filled this one. We have a duplicate and need to resolve it. */
+
+ unsigned existingSerial = in->serial;
+ }
+ }
+
-+ if (!in->valid &&
++ if (in && !in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
+ /* We only load some info, don't fiddle with directory structure */
+#endif
+ in->chunkId = chunk;
+
-+ } else if (!in->valid) {
++ } else if (in && !in->valid) {
+ /* we need to load this info */
+
+ in->valid = 1;
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ in->variant.symLinkVariant.
-+ alias =
++ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
++ if(!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
+ break;
+ }
+
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+
++ if(alloc_failed){
++ return YAFFS_FAIL;
++ }
++
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
++
+
+ return YAFFS_OK;
+}
+ yaffs_Device *dev = in->myDev;
+ yaffs_ExtendedTags tags;
+ int result;
-+
++ int alloc_failed = 0;
++
++ if(!in)
++ return;
++
+#if 0
+ T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
-+
++
+ if(in->lazyLoaded){
+ in->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+#endif
+ yaffs_SetObjectName(in, oh->name);
+
-+ if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
++ if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
++ if(!in->variant.symLinkVariant.alias)
++ alloc_failed = 1; /* Not returned to caller */
++ }
+
+ yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__);
+ }
+ int isShrink;
+ int foundChunksInBlock;
+ int equivalentObjectId;
++ int alloc_failed = 0;
+
+
+ yaffs_BlockIndex *blockIndex = NULL;
+ return YAFFS_FAIL;
+ }
+
++ dev->blocksInCheckpoint = 0;
++
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+ /* Scan all the blocks to determine their state */
+
+
+ if(state == YAFFS_BLOCK_STATE_CHECKPOINT){
-+ /* todo .. fix free space ? */
++ dev->blocksInCheckpoint++;
+
+ } else if (state == YAFFS_BLOCK_STATE_DEAD) {
+ T(YAFFS_TRACE_BAD_BLOCKS,
+
+ /* Sort the blocks */
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
-+ {
-+ /* Use qsort now. */
-+ qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
-+ }
++ yaffs_qsort(blockIndex, nBlocksToScan,
++ sizeof(yaffs_BlockIndex), ybicmp);
+#else
+ {
+ /* Dungy old bubble sort... */
+ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
+
+ /* For each block.... backwards */
-+ for (blockIterator = endIterator; blockIterator >= startIterator;
++ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
+ blockIterator--) {
+ /* Cooperative multitasking! This loop can run for so
+ long that watchdog timers expire. */
+ blk = blockIndex[blockIterator].block;
+
+ bi = yaffs_GetBlockInfo(dev, blk);
++
++
+ state = bi->blockState;
+
+ deleted = 0;
+
+ /* For each chunk in each block that needs scanning.... */
+ foundChunksInBlock = 0;
-+ for (c = dev->nChunksPerBlock - 1; c >= 0 &&
++ for (c = dev->nChunksPerBlock - 1;
++ !alloc_failed && c >= 0 &&
+ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
+ /* Scan backwards...
+ * Read the tags and decide what to do
+ */
++
+ chunk = blk * dev->nChunksPerBlock + c;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ tags.
+ objectId,
+ YAFFS_OBJECT_TYPE_FILE);
-+ if (in->variantType == YAFFS_OBJECT_TYPE_FILE
++ if(!in){
++ /* Out of memory */
++ alloc_failed = 1;
++ }
++
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
+ && chunkBase <
+ in->variant.fileVariant.shrinkSize) {
+ /* This has not been invalidated by a resize */
-+ yaffs_PutChunkIntoFile(in, tags.chunkId,
-+ chunk, -1);
++ if(!yaffs_PutChunkIntoFile(in, tags.chunkId,
++ chunk, -1)){
++ alloc_failed = 1;
++ }
+
+ /* File size is calculated by looking at the data chunks if we have not
+ * seen an object header yet. Stop this practice once we find an object header.
+ scannedFileSize;
+ }
+
-+ } else {
++ } else if(in) {
+ /* This chunk has been invalidated by a resize, so delete */
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
-+ if(oh)
++ if(oh){
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->
+ alias);
++ if(!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
++ }
+ break;
+ }
+
+ }
++
+ }
-+ }
++
++ } /* End of scanning for each chunk */
+
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ /* If we got this far while scanning, then the block is fully allocated. */
+ }
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++
++ if(alloc_failed){
++ return YAFFS_FAIL;
++ }
+
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+
+ */
+ yaffs_GetObjectName(l, buffer,
+ YAFFS_MAX_NAME_LENGTH);
-+ if (yaffs_strcmp(name, buffer) == 0) {
++ if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) {
+ return l;
+ }
+
+ if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ /* We want the object id of the equivalent object, not this one */
+ obj = obj->variant.hardLinkVariant.equivalentObject;
++ yaffs_CheckObjectDetailsLoaded(obj);
+ }
+ return obj;
+
+}
+
+
-+static void yaffs_CreateInitialDirectories(yaffs_Device *dev)
++static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
+{
+ /* Initialise the unlinked, deleted, root and lost and found directories */
+
+
+ dev->unlinkedDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
++
+ dev->deletedDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+
+ dev->lostNFoundDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
-+ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
++
++ if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){
++ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
++ return YAFFS_OK;
++ }
++
++ return YAFFS_FAIL;
+}
+
+int yaffs_GutsInitialise(yaffs_Device * dev)
+{
++ int init_failed = 0;
+ unsigned x;
+ int bits;
+
+ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
+
+ /* Initialise temporary buffers and caches. */
-+ {
-+ int i;
-+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
-+ dev->tempBuffer[i].line = 0; /* not in use */
-+ dev->tempBuffer[i].buffer =
-+ YMALLOC_DMA(dev->nDataBytesPerChunk);
-+ }
-+ }
++ if(!yaffs_InitialiseTempBuffers(dev))
++ init_failed = 1;
+
-+ if (dev->nShortOpCaches > 0) {
++ dev->srCache = NULL;
++ dev->gcCleanupList = NULL;
++
++
++ if (!init_failed &&
++ dev->nShortOpCaches > 0) {
+ int i;
++ __u8 *buf;
++ int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
+
+ if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
+ dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
+ }
+
-+ dev->srCache =
-+ YMALLOC(dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
-+
-+ for (i = 0; i < dev->nShortOpCaches; i++) {
++ buf = dev->srCache = YMALLOC(srCacheBytes);
++
++ if(dev->srCache)
++ memset(dev->srCache,0,srCacheBytes);
++
++ for (i = 0; i < dev->nShortOpCaches && buf; i++) {
+ dev->srCache[i].object = NULL;
+ dev->srCache[i].lastUse = 0;
+ dev->srCache[i].dirty = 0;
-+ dev->srCache[i].data = YMALLOC_DMA(dev->nDataBytesPerChunk);
++ dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk);
+ }
++ if(!buf)
++ init_failed = 1;
++
+ dev->srLastUse = 0;
+ }
+
+ dev->cacheHits = 0;
+
-+ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
++ if(!init_failed){
++ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
++ if(!dev->gcCleanupList)
++ init_failed = 1;
++ }
+
+ if (dev->isYaffs2) {
+ dev->useHeaderFileSize = 1;
+ }
-+
-+ yaffs_InitialiseBlocks(dev);
++ if(!init_failed && !yaffs_InitialiseBlocks(dev))
++ init_failed = 1;
++
+ yaffs_InitialiseTnodes(dev);
+ yaffs_InitialiseObjects(dev);
+
-+ yaffs_CreateInitialDirectories(dev);
++ if(!init_failed && !yaffs_CreateInitialDirectories(dev))
++ init_failed = 1;
+
+
-+ /* Now scan the flash. */
-+ if (dev->isYaffs2) {
-+ if(yaffs_CheckpointRestore(dev)) {
-+ T(YAFFS_TRACE_CHECKPOINT,
-+ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
-+ } else {
++ if(!init_failed){
++ /* Now scan the flash. */
++ if (dev->isYaffs2) {
++ if(yaffs_CheckpointRestore(dev)) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
++ } else {
+
-+ /* Clean up the mess caused by an aborted checkpoint load
-+ * and scan backwards.
-+ */
-+ yaffs_DeinitialiseBlocks(dev);
-+ yaffs_DeinitialiseTnodes(dev);
-+ yaffs_DeinitialiseObjects(dev);
-+ yaffs_InitialiseBlocks(dev);
-+ yaffs_InitialiseTnodes(dev);
-+ yaffs_InitialiseObjects(dev);
-+ yaffs_CreateInitialDirectories(dev);
++ /* Clean up the mess caused by an aborted checkpoint load
++ * and scan backwards.
++ */
++ yaffs_DeinitialiseBlocks(dev);
++ yaffs_DeinitialiseTnodes(dev);
++ yaffs_DeinitialiseObjects(dev);
++
++
++ dev->nErasedBlocks = 0;
++ dev->nFreeChunks = 0;
++ dev->allocationBlock = -1;
++ dev->allocationPage = -1;
++ dev->nDeletedFiles = 0;
++ dev->nUnlinkedFiles = 0;
++ dev->nBackgroundDeletions = 0;
++ dev->oldestDirtySequence = 0;
++
++ if(!init_failed && !yaffs_InitialiseBlocks(dev))
++ init_failed = 1;
++
++ yaffs_InitialiseTnodes(dev);
++ yaffs_InitialiseObjects(dev);
+
-+ yaffs_ScanBackwards(dev);
-+ }
-+ }else
-+ yaffs_Scan(dev);
++ if(!init_failed && !yaffs_CreateInitialDirectories(dev))
++ init_failed = 1;
++
++ if(!init_failed && !yaffs_ScanBackwards(dev))
++ init_failed = 1;
++ }
++ }else
++ if(!yaffs_Scan(dev))
++ init_failed = 1;
++ }
++
++ if(init_failed){
++ /* Clean up the mess */
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
++
++ yaffs_Deinitialise(dev);
++ return YAFFS_FAIL;
++ }
+
+ /* Zero out stats */
+ dev->nPageReads = 0;
+ dev->nRetiredBlocks = 0;
+
+ yaffs_VerifyFreeChunks(dev);
++ yaffs_VerifyBlocks(dev);
++
+
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
+ yaffs_DeinitialiseBlocks(dev);
+ yaffs_DeinitialiseTnodes(dev);
+ yaffs_DeinitialiseObjects(dev);
-+ if (dev->nShortOpCaches > 0) {
++ if (dev->nShortOpCaches > 0 &&
++ dev->srCache) {
+
+ for (i = 0; i < dev->nShortOpCaches; i++) {
-+ YFREE(dev->srCache[i].data);
++ if(dev->srCache[i].data)
++ YFREE(dev->srCache[i].data);
++ dev->srCache[i].data = NULL;
+ }
+
+ YFREE(dev->srCache);
++ dev->srCache = NULL;
+ }
+
+ YFREE(dev->gcCleanupList);
+
+static void yaffs_VerifyFreeChunks(yaffs_Device * dev)
+{
-+ int counted = yaffs_CountFreeChunks(dev);
++ int counted;
++ int difference;
++
++ if(yaffs_SkipVerification(dev))
++ return;
++
++ counted = yaffs_CountFreeChunks(dev);
+
-+ int difference = dev->nFreeChunks - counted;
++ difference = dev->nFreeChunks - counted;
+
+ if (difference) {
+ T(YAFFS_TRACE_ALWAYS,
+
+ return YAFFS_OK;
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_guts.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_guts.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_guts.h 2007-05-26 21:13:40.732658360 +0200
-@@ -0,0 +1,893 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.h linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,902 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_guts.h: Configuration etc for yaffs_guts
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ *
-+ * $Id: yaffs_guts.h,v 1.25 2006/10/13 08:52:49 charles Exp $
+ */
+
+#ifndef __YAFFS_GUTS_H__
+
+#define YAFFS_OBJECT_SPACE 0x40000
+
-+#define YAFFS_NCHECKPOINT_OBJECTS 5000
-+
-+#define YAFFS_CHECKPOINT_VERSION 2
++#define YAFFS_CHECKPOINT_VERSION 3
+
+#ifdef CONFIG_YAFFS_UNICODE
+#define YAFFS_MAX_NAME_LENGTH 127
+
+#define YAFFS_N_TEMP_BUFFERS 4
+
++/* We limit the number attempts at sucessfully saving a chunk of data.
++ * Small-page devices have 32 pages per block; large-page devices have 64.
++ * Default to something in the order of 5 to 10 blocks worth of chunks.
++ */
++#define YAFFS_WR_ATTEMPTS (5*64)
++
+/* Sequence numbers are used in YAFFS2 to determine block allocation order.
+ * The range is limited slightly to help distinguish bad numbers from good.
+ * This also allows us to perhaps in the future use special numbers for
+ YAFFS_OBJECT_TYPE_SPECIAL
+} yaffs_ObjectType;
+
++#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
++
+typedef struct {
+
+ unsigned validMarker0;
+ /* This block has failed and is not in use */
+} yaffs_BlockState;
+
++#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
++
++
+typedef struct {
+
+ int softDeletions:10; /* number of soft deleted pages */
+ __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
+ /* and retire the block. */
+ __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
-+ __u32 gcPrioritise: 1; /* An ECC check or bank check has failed on this block.
++ __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block.
+ It should be prioritised for GC */
+ __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
+
+ int nReservedBlocks; /* We want this tuneable so that we can reduce */
+ /* reserved blocks on NOR and RAM. */
+
-+ /* Stuff used by the partitioned checkpointing mechanism */
-+ int checkpointStartBlock;
-+ int checkpointEndBlock;
+
+ /* Stuff used by the shared space checkpointing mechanism */
+ /* If this value is zero, then this mechanism is disabled */
+
+
+ /* End of stuff that must be set before initialisation. */
++
++ /* Checkpoint control. Can be set before or after initialisation */
++ __u8 skipCheckpointRead;
++ __u8 skipCheckpointWrite;
+
+ /* Runtime parameters. Set up by YAFFS. */
+
+ int checkpointNextBlock;
+ int *checkpointBlockList;
+ int checkpointMaxBlocks;
++ __u32 checkpointSum;
++ __u32 checkpointXor;
+
+ /* Block Info */
+ yaffs_BlockInfo *blockInfo;
+ int currentDirtyChecker; /* Used to find current dirtiest block */
+
+ __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
++ int nonAggressiveSkip; /* GC state/mode */
+
+ /* Statistcs */
+ int nPageWrites;
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
+
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffsinterface.h linux-2.6.21.1.dev/fs/yaffs2/yaffsinterface.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffsinterface.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffsinterface.h 2007-05-26 21:13:40.732658360 +0200
-@@ -0,0 +1,23 @@
-+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffsinterface.h: Interface to the guts of yaffs.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@aleph1.co.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU Lesser General Public License version 2.1 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ *
-+ */
-+
-+#ifndef __YAFFSINTERFACE_H__
-+#define __YAFFSINTERFACE_H__
-+
-+int yaffs_Initialise(unsigned nBlocks);
-+
-+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif2.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif2.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif2.c 2007-05-26 21:13:40.733658208 +0200
-@@ -0,0 +1,234 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,241 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_mtdif.c NAND mtd wrapper functions.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
+ */
+
-+/* mtd interface for YAFFS2 */
-+
-+const char *yaffs_mtdif2_c_version =
-+ "$Id: yaffs_mtdif2.c,v 1.15 2006/11/08 06:24:34 charles Exp $";
++const char *yaffs_mtdif_c_version =
++ "$Id: yaffs_mtdif.c,v 1.19 2007-02-14 01:09:06 wookey Exp $";
+
+#include "yportenv.h"
+
+
-+#include "yaffs_mtdif2.h"
++#include "yaffs_mtdif.h"
+
+#include "linux/mtd/mtd.h"
+#include "linux/types.h"
+#include "linux/time.h"
++#include "linux/mtd/nand.h"
+
-+#include "yaffs_packedtags2.h"
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
++static struct nand_oobinfo yaffs_oobinfo = {
++ .useecc = 1,
++ .eccbytes = 6,
++ .eccpos = {8, 9, 10, 13, 14, 15}
++};
+
-+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
-+ const __u8 * data,
-+ const yaffs_ExtendedTags * tags)
-+{
-+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ struct mtd_oob_ops ops;
-+#else
-+ size_t dummy;
-+#endif
-+ int retval = 0;
-+
-+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-+
-+ yaffs_PackedTags2 pt;
-+
-+ T(YAFFS_TRACE_MTD,
-+ (TSTR
-+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
-+ TENDSTR), chunkInNAND, data, tags));
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ if (tags)
-+ yaffs_PackTags2(&pt, tags);
-+ else
-+ BUG(); /* both tags and data should always be present */
-+
-+ if (data) {
-+ ops.mode = MTD_OOB_AUTO;
-+ ops.ooblen = sizeof(pt);
-+ ops.len = dev->nDataBytesPerChunk;
-+ ops.ooboffs = 0;
-+ ops.datbuf = (__u8 *)data;
-+ ops.oobbuf = (void *)&pt;
-+ retval = mtd->write_oob(mtd, addr, &ops);
-+ } else
-+ BUG(); /* both tags and data should always be present */
-+#else
-+ if (tags) {
-+ yaffs_PackTags2(&pt, tags);
-+ }
-+
-+ if (data && tags) {
-+ if (dev->useNANDECC)
-+ retval =
-+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
-+ &dummy, data, (__u8 *) & pt, NULL);
-+ else
-+ retval =
-+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
-+ &dummy, data, (__u8 *) & pt, NULL);
-+ } else {
-+ if (data)
-+ retval =
-+ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
-+ data);
-+ if (tags)
-+ retval =
-+ mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
-+ (__u8 *) & pt);
-+
-+ }
-+#endif
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-+ __u8 * data, yaffs_ExtendedTags * tags)
-+{
-+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ struct mtd_oob_ops ops;
-+#endif
-+ size_t dummy;
-+ int retval = 0;
-+
-+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-+
-+ yaffs_PackedTags2 pt;
-+
-+ T(YAFFS_TRACE_MTD,
-+ (TSTR
-+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
-+ TENDSTR), chunkInNAND, data, tags));
-+
-+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-+ if (data && !tags)
-+ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
-+ &dummy, data);
-+ else if (tags) {
-+ ops.mode = MTD_OOB_AUTO;
-+ ops.ooblen = sizeof(pt);
-+ ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
-+ ops.ooboffs = 0;
-+ ops.datbuf = data;
-+ ops.oobbuf = dev->spareBuffer;
-+ retval = mtd->read_oob(mtd, addr, &ops);
-+ }
-+#else
-+ if (data && tags) {
-+ if (dev->useNANDECC) {
-+ retval =
-+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
-+ &dummy, data, dev->spareBuffer,
-+ NULL);
-+ } else {
-+ retval =
-+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
-+ &dummy, data, dev->spareBuffer,
-+ NULL);
-+ }
-+ } else {
-+ if (data)
-+ retval =
-+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
-+ data);
-+ if (tags)
-+ retval =
-+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
-+ dev->spareBuffer);
-+ }
-+#endif
-+
-+ memcpy(&pt, dev->spareBuffer, sizeof(pt));
-+
-+ if (tags)
-+ yaffs_UnpackTags2(tags, &pt);
-+
-+ if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
-+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
-+{
-+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-+ int retval;
-+ T(YAFFS_TRACE_MTD,
-+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
-+
-+ retval =
-+ mtd->block_markbad(mtd,
-+ blockNo * dev->nChunksPerBlock *
-+ dev->nDataBytesPerChunk);
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+
-+}
-+
-+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-+ yaffs_BlockState * state, int *sequenceNumber)
-+{
-+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-+ int retval;
-+
-+ T(YAFFS_TRACE_MTD,
-+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
-+ retval =
-+ mtd->block_isbad(mtd,
-+ blockNo * dev->nChunksPerBlock *
-+ dev->nDataBytesPerChunk);
-+
-+ if (retval) {
-+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
-+
-+ *state = YAFFS_BLOCK_STATE_DEAD;
-+ *sequenceNumber = 0;
-+ } else {
-+ yaffs_ExtendedTags t;
-+ nandmtd2_ReadChunkWithTagsFromNAND(dev,
-+ blockNo *
-+ dev->nChunksPerBlock, NULL,
-+ &t);
-+
-+ if (t.chunkUsed) {
-+ *sequenceNumber = t.sequenceNumber;
-+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
-+ } else {
-+ *sequenceNumber = 0;
-+ *state = YAFFS_BLOCK_STATE_EMPTY;
-+ }
-+ }
-+ T(YAFFS_TRACE_MTD,
-+ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
-+ *state));
-+
-+ if (retval == 0)
-+ return YAFFS_OK;
-+ else
-+ return YAFFS_FAIL;
-+}
-+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif2.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif2.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif2.h 2007-05-26 21:13:40.733658208 +0200
-@@ -0,0 +1,29 @@
-+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_mtdif.c NAND mtd wrapper functions.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@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.
-+ *
-+ */
-+
-+#ifndef __YAFFS_MTDIF2_H__
-+#define __YAFFS_MTDIF2_H__
-+
-+#include "yaffs_guts.h"
-+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
-+ const __u8 * data,
-+ const yaffs_ExtendedTags * tags);
-+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-+ __u8 * data, yaffs_ExtendedTags * tags);
-+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
-+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
-+ yaffs_BlockState * state, int *sequenceNumber);
-+
-+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif.c 2007-05-26 21:13:40.733658208 +0200
-@@ -0,0 +1,243 @@
-+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_mtdif.c NAND mtd wrapper functions.
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
-+ * for Toby Churchill Ltd and Brightstar Engineering
-+ *
-+ * Created by Charles Manning <charles@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.
-+ *
-+ */
-+
-+const char *yaffs_mtdif_c_version =
-+ "$Id: yaffs_mtdif.c,v 1.17 2006/11/29 20:21:12 charles Exp $";
-+
-+#include "yportenv.h"
-+
-+
-+#include "yaffs_mtdif.h"
-+
-+#include "linux/mtd/mtd.h"
-+#include "linux/types.h"
-+#include "linux/time.h"
-+#include "linux/mtd/nand.h"
-+
-+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
-+static struct nand_oobinfo yaffs_oobinfo = {
-+ .useecc = 1,
-+ .eccbytes = 6,
-+ .eccpos = {8, 9, 10, 13, 14, 15}
-+};
-+
-+static struct nand_oobinfo yaffs_noeccinfo = {
-+ .useecc = 0,
-+};
++static struct nand_oobinfo yaffs_noeccinfo = {
++ .useecc = 0,
++};
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ return YAFFS_FAIL;
+}
+
-+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
++int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ __u32 addr =
++ ((loff_t) blockNumber) * dev->nDataBytesPerChunk
++ * dev->nChunksPerBlock;
++ struct erase_info ei;
++ int retval = 0;
++
++ ei.mtd = mtd;
++ ei.addr = addr;
++ ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
++ ei.time = 1000;
++ ei.retries = 2;
++ ei.callback = NULL;
++ ei.priv = (u_long) dev;
++
++ /* Todo finish off the ei if required */
++
++ sema_init(&dev->sem, 0);
++
++ retval = mtd->erase(mtd, &ei);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_InitialiseNAND(yaffs_Device * dev)
++{
++ return YAFFS_OK;
++}
++
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,27 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_MTDIF_H__
++#define __YAFFS_MTDIF_H__
++
++#include "yaffs_guts.h"
++
++int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
++ const __u8 * data, const yaffs_Spare * spare);
++int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
++ yaffs_Spare * spare);
++int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber);
++int nandmtd_InitialiseNAND(yaffs_Device * dev);
++#endif
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,434 @@
++From ian@brightstareng.com Fri May 18 15:06:49 2007
++From ian@brightstareng.com Fri May 18 15:08:21 2007
++Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
++ by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
++ (envelope-from <ian@brightstareng.com>)
++ id 1Hp380-00011e-T6
++ for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
++Received: from localhost (localhost.localdomain [127.0.0.1])
++ by zebra.brightstareng.com (Postfix) with ESMTP
++ id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
++Received: from zebra.brightstareng.com ([127.0.0.1])
++ by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
++ id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
++Received: from pippin (unknown [192.168.1.25])
++ by zebra.brightstareng.com (Postfix) with ESMTP
++ id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
++From: Ian McDonnell <ian@brightstareng.com>
++To: David Goodenough <david.goodenough@linkchoose.co.uk>
++Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
++Date: Fri, 18 May 2007 10:06:49 -0400
++User-Agent: KMail/1.9.1
++References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
++In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
++Cc: Andrea Conti <alyf@alyf.net>,
++ Charles Manning <manningc2@actrix.gen.nz>
++MIME-Version: 1.0
++Content-Type: Multipart/Mixed;
++ boundary="Boundary-00=_5LbTGmt62YoutxM"
++Message-Id: <200705181006.49860.ian@brightstareng.com>
++X-Virus-Scanned: by amavisd-new at brightstareng.com
++Status: R
++X-Status: NT
++X-KMail-EncryptionState:
++X-KMail-SignatureState:
++X-KMail-MDN-Sent:
++
++--Boundary-00=_5LbTGmt62YoutxM
++Content-Type: text/plain;
++ charset="iso-8859-15"
++Content-Transfer-Encoding: 7bit
++Content-Disposition: inline
++
++David, Andrea,
++
++On Friday 18 May 2007 08:34, you wrote:
++> Yea team. With this fix in place (I put it in the wrong place
++> at first) I can now mount and ls the Yaffs partition without
++> an error messages!
++
++Good news!
++
++Attached is a newer yaffs_mtdif1.c with a bandaid to help the
++2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
++See the LINUX_VERSION_CODE conditional in
++nandmtd1_ReadChunkWithTagsFromNAND.
++
++-imcd
++
++--Boundary-00=_5LbTGmt62YoutxM
++Content-Type: text/x-csrc;
++ charset="iso-8859-15";
++ name="yaffs_mtdif1.c"
++Content-Transfer-Encoding: 7bit
++Content-Disposition: attachment;
++ filename="yaffs_mtdif1.c"
++
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * 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.
++ */
++
++/*
++ * This module provides the interface between yaffs_nand.c and the
++ * MTD API. This version is used when the MTD interface supports the
++ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
++ * and we have small-page NAND device.
++ *
++ * These functions are invoked via function pointers in yaffs_nand.c.
++ * This replaces functionality provided by functions in yaffs_mtdif.c
++ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
++ * called in yaffs_mtdif.c when the function pointers are NULL.
++ * We assume the MTD layer is performing ECC (useNANDECC is true).
++ */
++
++#include "yportenv.h"
++#include "yaffs_guts.h"
++#include "yaffs_packedtags1.h"
++#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
++
++#include "linux/kernel.h"
++#include "linux/version.h"
++#include "linux/types.h"
++#include "linux/mtd/mtd.h"
++
++/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++
++const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $";
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++# define YTAG1_SIZE 8
++#else
++# define YTAG1_SIZE 9
++#endif
++
++#if 0
++/* Use the following nand_ecclayout with MTD when using
++ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
++ * If you have existing Yaffs images and the byte order differs from this,
++ * adjust 'oobfree' to match your existing Yaffs data.
++ *
++ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
++ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
++ * the 9th byte.
++ *
++ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
++ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
++ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
++ * byte and B is the small-page bad-block indicator byte.
++ */
++static struct nand_ecclayout nand_oob_16 = {
++ .eccbytes = 6,
++ .eccpos = { 8, 9, 10, 13, 14, 15 },
++ .oobavail = 9,
++ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
++};
++#endif
++
++/* Write a chunk (page) of data to NAND.
++ *
++ * Caller always provides ExtendedTags data which are converted to a more
++ * compact (packed) form for storage in NAND. A mini-ECC runs over the
++ * contents of the tags meta-data; used to valid the tags when read.
++ *
++ * - Pack ExtendedTags to PackedTags1 form
++ * - Compute mini-ECC for PackedTags1
++ * - Write data and packed tags to NAND.
++ *
++ * Note: Due to the use of the PackedTags1 meta-data which does not include
++ * a full sequence number (as found in the larger PackedTags2 form) it is
++ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
++ * discarded and dirty. This is not ideal: newer NAND parts are supposed
++ * to be written just once. When Yaffs performs this operation, this
++ * function is called with a NULL data pointer -- calling MTD write_oob
++ * without data is valid usage (2.6.17).
++ *
++ * Any underlying MTD error results in YAFFS_FAIL.
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++
++ /* we assume that PackedTags1 and yaffs_Tags are compatible */
++ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
++ compile_time_assertion(sizeof(yaffs_Tags) == 8);
++
++ yaffs_PackTags1(&pt1, etags);
++ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
++
++ /* When deleting a chunk, the upper layer provides only skeletal
++ * etags, one with chunkDeleted set. However, we need to update the
++ * tags, not erase them completely. So we use the NAND write property
++ * that only zeroed-bits stick and set tag bytes to all-ones and
++ * zero just the (not) deleted bit.
++ */
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* clear delete status bit to indicate deleted */
++ pt1.deleted = 0;
++ }
++#else
++ ((__u8 *)&pt1)[8] = 0xff;
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* zero pageStatus byte to indicate deleted */
++ ((__u8 *)&pt1)[8] = 0;
++ }
++#endif
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = (__u8 *)data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++ retval = mtd->write_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "write_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++ return retval ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Return with empty ExtendedTags but add eccResult.
++ */
++static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
++{
++ if (etags) {
++ memset(etags, 0, sizeof(*etags));
++ etags->eccResult = eccResult;
++ }
++ return retval;
++}
++
++/* Read a chunk (page) from NAND.
++ *
++ * Caller expects ExtendedTags data to be usable even on error; that is,
++ * all members except eccResult and blockBad are zeroed.
++ *
++ * - Check ECC results for data (if applicable)
++ * - Check for blank/erased block (return empty ExtendedTags if blank)
++ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
++ * - Convert PackedTags1 to ExtendedTags
++ * - Update eccResult and blockBad members to refect state.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
++ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++ int deleted;
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
++ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
++ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
++ */
++ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
++#endif
++ /* Read page and oob using MTD.
++ * Check status and determine ECC result.
++ */
++ retval = mtd->read_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "read_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++
++ switch (retval) {
++ case 0:
++ /* no error */
++ break;
++
++ case -EUCLEAN:
++ /* MTD's ECC fixed the data */
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ dev->eccFixed++;
++ break;
++
++ case -EBADMSG:
++ /* MTD's ECC could not fix the data */
++ dev->eccUnfixed++;
++ /* fall into... */
++ default:
++ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
++ etags->blockBad = (mtd->block_isbad)(mtd, addr);
++ return YAFFS_FAIL;
++ }
++
++ /* Check for a blank/erased chunk.
++ */
++ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
++ /* when blank, upper layers want eccResult to be <= NO_ERROR */
++ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
++ }
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ /* Read deleted status (bit) then return it to it's non-deleted
++ * state before performing tags mini-ECC check. pt1.deleted is
++ * inverted.
++ */
++ deleted = !pt1.deleted;
++ pt1.deleted = 1;
++#else
++ (void) deleted; /* not used */
++#endif
++
++ /* Check the packed tags mini-ECC and correct if necessary/possible.
++ */
++ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
++ switch (retval) {
++ case 0:
++ /* no tags error, use MTD result */
++ break;
++ case 1:
++ /* recovered tags-ECC error */
++ dev->tagsEccFixed++;
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ break;
++ default:
++ /* unrecovered tags-ECC error */
++ dev->tagsEccUnfixed++;
++ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
++ }
++
++ /* Unpack the tags to extended form and set ECC result.
++ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
++ */
++ pt1.shouldBeFF = 0xFFFFFFFF;
++ yaffs_UnpackTags1(etags, &pt1);
++ etags->eccResult = eccres;
++
++ /* Set deleted state.
++ */
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ etags->chunkDeleted = deleted;
++#else
++ etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
++#endif
++ return YAFFS_OK;
++}
++
++/* Mark a block bad.
++ *
++ * This is a persistant state.
++ * Use of this function should be rare.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
++ int retval;
++
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
++
++ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
++ return (retval) ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Check any MTD prerequists.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
++{
++ /* 2.6.18 has mtd->ecclayout->oobavail */
++ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
++ int oobavail = mtd->ecclayout->oobavail;
++
++ if (oobavail < YTAG1_SIZE) {
++ yaffs_trace(YAFFS_TRACE_ERROR,
++ "mtd device has only %d bytes for tags, need %d",
++ oobavail, YTAG1_SIZE);
++ return YAFFS_FAIL;
++ }
++ return YAFFS_OK;
++}
++
++/* Query for the current state of a specific block.
++ *
++ * Examine the tags of the first chunk of the block and return the state:
++ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
++ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
++ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
++ *
++ * Always returns YAFFS_OK.
++ */
++int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState * pState, int *pSequenceNumber)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkNo = blockNo * dev->nChunksPerBlock;
++ yaffs_ExtendedTags etags;
++ int state = YAFFS_BLOCK_STATE_DEAD;
++ int seqnum = 0;
++ int retval;
++
++ /* We don't yet have a good place to test for MTD config prerequists.
++ * Do it here as we are called during the initial scan.
++ */
++ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
++ return YAFFS_FAIL;
++ }
++
++ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
++ if (etags.blockBad) {
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
++ "block %d is marked bad", blockNo);
++ state = YAFFS_BLOCK_STATE_DEAD;
++ }
++ else if (etags.chunkUsed) {
++ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ seqnum = etags.sequenceNumber;
++ }
++ else {
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++
++ *pState = state;
++ *pSequenceNumber = seqnum;
++
++ /* query always succeeds */
++ return YAFFS_OK;
++}
++
++#endif /*KERNEL_VERSION*/
++
++--Boundary-00=_5LbTGmt62YoutxM--
++
++
++
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,339 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * 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.
++ */
++
++/*
++ * This module provides the interface between yaffs_nand.c and the
++ * MTD API. This version is used when the MTD interface supports the
++ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
++ * and we have small-page NAND device.
++ *
++ * These functions are invoked via function pointers in yaffs_nand.c.
++ * This replaces functionality provided by functions in yaffs_mtdif.c
++ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
++ * called in yaffs_mtdif.c when the function pointers are NULL.
++ * We assume the MTD layer is performing ECC (useNANDECC is true).
++ */
++
++#include "yportenv.h"
++#include "yaffs_guts.h"
++#include "yaffs_packedtags1.h"
++#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
++
++#include "linux/kernel.h"
++#include "linux/version.h"
++#include "linux/types.h"
++#include "linux/mtd/mtd.h"
++
++/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
++/* should really be >= .17, but elsewhere > .17 is used, so be consistent */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++
++const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $";
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++# define YTAG1_SIZE 8
++#else
++# define YTAG1_SIZE 9
++#endif
++
++#if 0
++/* Use the following nand_ecclayout with MTD when using
++ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
++ * If you have existing Yaffs images and the byte order differs from this,
++ * adjust 'oobfree' to match your existing Yaffs data.
++ *
++ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
++ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
++ * the 9th byte.
++ *
++ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
++ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
++ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
++ * byte and B is the small-page bad-block indicator byte.
++ */
++static struct nand_ecclayout nand_oob_16 = {
++ .eccbytes = 6,
++ .eccpos = { 8, 9, 10, 13, 14, 15 },
++ .oobavail = 9,
++ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
++};
++#endif
++
++/* Write a chunk (page) of data to NAND.
++ *
++ * Caller always provides ExtendedTags data which are converted to a more
++ * compact (packed) form for storage in NAND. A mini-ECC runs over the
++ * contents of the tags meta-data; used to valid the tags when read.
++ *
++ * - Pack ExtendedTags to PackedTags1 form
++ * - Compute mini-ECC for PackedTags1
++ * - Write data and packed tags to NAND.
++ *
++ * Note: Due to the use of the PackedTags1 meta-data which does not include
++ * a full sequence number (as found in the larger PackedTags2 form) it is
++ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
++ * discarded and dirty. This is not ideal: newer NAND parts are supposed
++ * to be written just once. When Yaffs performs this operation, this
++ * function is called with a NULL data pointer -- calling MTD write_oob
++ * without data is valid usage (2.6.17).
++ *
++ * Any underlying MTD error results in YAFFS_FAIL.
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
++ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++
++ /* we assume that PackedTags1 and yaffs_Tags are compatible */
++ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
++ compile_time_assertion(sizeof(yaffs_Tags) == 8);
++
++ yaffs_PackTags1(&pt1, etags);
++ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
++
++ /* When deleting a chunk, the upper layer provides only skeletal
++ * etags, one with chunkDeleted set. However, we need to update the
++ * tags, not erase them completely. So we use the NAND write property
++ * that only zeroed-bits stick and set tag bytes to all-ones and
++ * zero just the (not) deleted bit.
++ */
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* clear delete status bit to indicate deleted */
++ pt1.deleted = 0;
++ }
++#else
++ ((__u8 *)&pt1)[8] = 0xff;
++ if (etags->chunkDeleted) {
++ memset(&pt1, 0xff, 8);
++ /* zero pageStatus byte to indicate deleted */
++ ((__u8 *)&pt1)[8] = 0;
++ }
++#endif
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = (__u8 *)data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++ retval = mtd->write_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "write_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++ return retval ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Return with empty ExtendedTags but add eccResult.
++ */
++static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
++{
++ if (etags) {
++ memset(etags, 0, sizeof(*etags));
++ etags->eccResult = eccResult;
++ }
++ return retval;
++}
++
++/* Read a chunk (page) from NAND.
++ *
++ * Caller expects ExtendedTags data to be usable even on error; that is,
++ * all members except eccResult and blockBad are zeroed.
++ *
++ * - Check ECC results for data (if applicable)
++ * - Check for blank/erased block (return empty ExtendedTags if blank)
++ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
++ * - Convert PackedTags1 to ExtendedTags
++ * - Update eccResult and blockBad members to refect state.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
++ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkBytes = dev->nDataBytesPerChunk;
++ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
++ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
++ struct mtd_oob_ops ops;
++ yaffs_PackedTags1 pt1;
++ int retval;
++ int deleted;
++
++ memset(&ops, 0, sizeof(ops));
++ ops.mode = MTD_OOB_AUTO;
++ ops.len = (data) ? chunkBytes : 0;
++ ops.ooblen = YTAG1_SIZE;
++ ops.datbuf = data;
++ ops.oobbuf = (__u8 *)&pt1;
++
++ /* Read page and oob using MTD.
++ * Check status and determine ECC result.
++ */
++ retval = mtd->read_oob(mtd, addr, &ops);
++ if (retval) {
++ yaffs_trace(YAFFS_TRACE_MTD,
++ "read_oob failed, chunk %d, mtd error %d\n",
++ chunkInNAND, retval);
++ }
++
++ switch (retval) {
++ case 0:
++ /* no error */
++ break;
++
++ case -EUCLEAN:
++ /* MTD's ECC fixed the data */
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ dev->eccFixed++;
++ break;
++
++ case -EBADMSG:
++ /* MTD's ECC could not fix the data */
++ dev->eccUnfixed++;
++ /* fall into... */
++ default:
++ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
++ etags->blockBad = (mtd->block_isbad)(mtd, addr);
++ return YAFFS_FAIL;
++ }
++
++ /* Check for a blank/erased chunk.
++ */
++ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
++ /* when blank, upper layers want eccResult to be <= NO_ERROR */
++ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
++ }
++
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ /* Read deleted status (bit) then return it to it's non-deleted
++ * state before performing tags mini-ECC check. pt1.deleted is
++ * inverted.
++ */
++ deleted = !pt1.deleted;
++ pt1.deleted = 1;
++#else
++ (void) deleted; /* not used */
++#endif
++
++ /* Check the packed tags mini-ECC and correct if necessary/possible.
++ */
++ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
++ switch (retval) {
++ case 0:
++ /* no tags error, use MTD result */
++ break;
++ case 1:
++ /* recovered tags-ECC error */
++ dev->tagsEccFixed++;
++ eccres = YAFFS_ECC_RESULT_FIXED;
++ break;
++ default:
++ /* unrecovered tags-ECC error */
++ dev->tagsEccUnfixed++;
++ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
++ }
++
++ /* Unpack the tags to extended form and set ECC result.
++ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
++ */
++ pt1.shouldBeFF = 0xFFFFFFFF;
++ yaffs_UnpackTags1(etags, &pt1);
++ etags->eccResult = eccres;
++
++ /* Set deleted state.
++ */
++#ifndef CONFIG_YAFFS_9BYTE_TAGS
++ etags->chunkDeleted = deleted;
++#else
++ etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
++#endif
++ return YAFFS_OK;
++}
++
++/* Mark a block bad.
++ *
++ * This is a persistant state.
++ * Use of this function should be rare.
++ *
++ * Returns YAFFS_OK or YAFFS_FAIL.
++ */
++int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
++ int retval;
++
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
++
++ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
++ return (retval) ? YAFFS_FAIL : YAFFS_OK;
++}
++
++/* Query for the current state of a specific block.
++ *
++ * Examine the tags of the first chunk of the block and return the state:
++ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
++ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
++ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
++ *
++ * Always returns YAFFS_OK.
++ */
++int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState * pState, int *pSequenceNumber)
++{
++ struct mtd_info * mtd = dev->genericDevice;
++ int chunkNo = blockNo * dev->nChunksPerBlock;
++ yaffs_ExtendedTags etags;
++ int state = YAFFS_BLOCK_STATE_DEAD;
++ int seqnum = 0;
++ int retval;
++#if 0
++ if (mtd->oobavail < YTAG1_SIZE) {
++ yaffs_trace(YAFFS_TRACE_ERROR,
++ "mtd device has only %d bytes for tags, need %d",
++ mtd->oobavail, YTAG1_SIZE);
++ return YAFFS_FAIL;
++ }
++#endif
++ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
++ if (etags.blockBad) {
++ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
++ "block %d is marked bad", blockNo);
++ state = YAFFS_BLOCK_STATE_DEAD;
++ }
++ else if (etags.chunkUsed) {
++ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ seqnum = etags.sequenceNumber;
++ }
++ else {
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++
++ *pState = state;
++ *pSequenceNumber = seqnum;
++
++ /* query always succeeds */
++ return YAFFS_OK;
++}
++
++#endif /*KERNEL_VERSION*/
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,28 @@
++/*
++ * YAFFS: Yet another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_MTDIF1_H__
++#define __YAFFS_MTDIF1_H__
++
++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
++ const __u8 * data, const yaffs_ExtendedTags * tags);
++
++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
++ __u8 * data, yaffs_ExtendedTags * tags);
++
++int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++
++int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState * state, int *sequenceNumber);
++
++#endif
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,232 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@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.
++ */
++
++/* mtd interface for YAFFS2 */
++
++const char *yaffs_mtdif2_c_version =
++ "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
++
++#include "yportenv.h"
++
++
++#include "yaffs_mtdif2.h"
++
++#include "linux/mtd/mtd.h"
++#include "linux/types.h"
++#include "linux/time.h"
++
++#include "yaffs_packedtags2.h"
++
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
++ const __u8 * data,
++ const yaffs_ExtendedTags * tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++ struct mtd_oob_ops ops;
++#else
++ size_t dummy;
++#endif
++ int retval = 0;
++
++ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,
++ (TSTR
++ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
++ TENDSTR), chunkInNAND, data, tags));
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++ if (tags)
++ yaffs_PackTags2(&pt, tags);
++ else
++ BUG(); /* both tags and data should always be present */
++
++ if (data) {
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = sizeof(pt);
++ ops.len = dev->nDataBytesPerChunk;
++ ops.ooboffs = 0;
++ ops.datbuf = (__u8 *)data;
++ ops.oobbuf = (void *)&pt;
++ retval = mtd->write_oob(mtd, addr, &ops);
++ } else
++ BUG(); /* both tags and data should always be present */
++#else
++ if (tags) {
++ yaffs_PackTags2(&pt, tags);
++ }
++
++ if (data && tags) {
++ if (dev->useNANDECC)
++ retval =
++ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, (__u8 *) & pt, NULL);
++ else
++ retval =
++ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, (__u8 *) & pt, NULL);
++ } else {
++ if (data)
++ retval =
++ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++ data);
++ if (tags)
++ retval =
++ mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
++ (__u8 *) & pt);
++
++ }
++#endif
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
++ __u8 * data, yaffs_ExtendedTags * tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++ struct mtd_oob_ops ops;
++#endif
++ size_t dummy;
++ int retval = 0;
++
++ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,
++ (TSTR
++ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
++ TENDSTR), chunkInNAND, data, tags));
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
++ if (data && !tags)
++ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data);
++ else if (tags) {
++ ops.mode = MTD_OOB_AUTO;
++ ops.ooblen = sizeof(pt);
++ ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
++ ops.ooboffs = 0;
++ ops.datbuf = data;
++ ops.oobbuf = dev->spareBuffer;
++ retval = mtd->read_oob(mtd, addr, &ops);
++ }
++#else
++ if (data && tags) {
++ if (dev->useNANDECC) {
++ retval =
++ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, dev->spareBuffer,
++ NULL);
++ } else {
++ retval =
++ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
++ &dummy, data, dev->spareBuffer,
++ NULL);
++ }
++ } else {
++ if (data)
++ retval =
++ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
++ data);
++ if (tags)
++ retval =
++ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
++ dev->spareBuffer);
++ }
++#endif
++
++ memcpy(&pt, dev->spareBuffer, sizeof(pt));
++
++ if (tags)
++ yaffs_UnpackTags2(tags, &pt);
++
++ if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
++ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ int retval;
++ T(YAFFS_TRACE_MTD,
++ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
++
++ retval =
++ mtd->block_markbad(mtd,
++ blockNo * dev->nChunksPerBlock *
++ dev->nDataBytesPerChunk);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++
++}
++
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState * state, int *sequenceNumber)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-+ __u32 addr =
-+ ((loff_t) blockNumber) * dev->nDataBytesPerChunk
-+ * dev->nChunksPerBlock;
-+ struct erase_info ei;
-+ int retval = 0;
++ int retval;
+
-+ ei.mtd = mtd;
-+ ei.addr = addr;
-+ ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
-+ ei.time = 1000;
-+ ei.retries = 2;
-+ ei.callback = NULL;
-+ ei.priv = (u_long) dev;
++ T(YAFFS_TRACE_MTD,
++ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
++ retval =
++ mtd->block_isbad(mtd,
++ blockNo * dev->nChunksPerBlock *
++ dev->nDataBytesPerChunk);
+
-+ /* Todo finish off the ei if required */
++ if (retval) {
++ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
+
-+ sema_init(&dev->sem, 0);
++ *state = YAFFS_BLOCK_STATE_DEAD;
++ *sequenceNumber = 0;
++ } else {
++ yaffs_ExtendedTags t;
++ nandmtd2_ReadChunkWithTagsFromNAND(dev,
++ blockNo *
++ dev->nChunksPerBlock, NULL,
++ &t);
+
-+ retval = mtd->erase(mtd, &ei);
++ if (t.chunkUsed) {
++ *sequenceNumber = t.sequenceNumber;
++ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ } else {
++ *sequenceNumber = 0;
++ *state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++ }
++ T(YAFFS_TRACE_MTD,
++ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
++ *state));
+
+ if (retval == 0)
+ return YAFFS_OK;
+ return YAFFS_FAIL;
+}
+
-+int nandmtd_InitialiseNAND(yaffs_Device * dev)
-+{
-+ return YAFFS_OK;
-+}
-+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_mtdif.h 2007-05-26 21:13:40.733658208 +0200
-@@ -0,0 +1,31 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,29 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_mtdif.h NAND mtd interface wrappers
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
-+ *
-+ * $Id: yaffs_mtdif.h,v 1.3 2005/08/11 01:07:43 marty Exp $
+ */
+
-+#ifndef __YAFFS_MTDIF_H__
-+#define __YAFFS_MTDIF_H__
++#ifndef __YAFFS_MTDIF2_H__
++#define __YAFFS_MTDIF2_H__
+
+#include "yaffs_guts.h"
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
++ const __u8 * data,
++ const yaffs_ExtendedTags * tags);
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
++ __u8 * data, yaffs_ExtendedTags * tags);
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
++ yaffs_BlockState * state, int *sequenceNumber);
+
-+int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
-+ const __u8 * data, const yaffs_Spare * spare);
-+int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
-+ yaffs_Spare * spare);
-+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber);
-+int nandmtd_InitialiseNAND(yaffs_Device * dev);
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_nand.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_nand.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_nand.c 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,135 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.c linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,134 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
+ */
+
+const char *yaffs_nand_c_version =
-+ "$Id: yaffs_nand.c,v 1.5 2006/11/08 09:52:12 charles Exp $";
++ "$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $";
+
+#include "yaffs_nand.h"
+#include "yaffs_tagscompat.h"
+
+
+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_nandemul2k.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_nandemul2k.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_nandemul2k.h 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,42 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,44 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_NAND_H__
++#define __YAFFS_NAND_H__
++#include "yaffs_guts.h"
++
++
++
++int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
++ __u8 * buffer,
++ yaffs_ExtendedTags * tags);
++
++int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
++ int chunkInNAND,
++ const __u8 * buffer,
++ yaffs_ExtendedTags * tags);
++
++int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
++
++int yaffs_QueryInitialBlockState(yaffs_Device * dev,
++ int blockNo,
++ yaffs_BlockState * state,
++ unsigned *sequenceNumber);
++
++int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
++ int blockInNAND);
++
++int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++
++#endif
++
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,39 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
-+ * yaffs_nandemul2k.h: Interface to emulated NAND functions (2k page size)
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
+ *
-+ * $Id: yaffs_nandemul2k.h,v 1.2 2005/08/11 02:37:49 marty Exp $
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
++/* Interface to emulated NAND functions (2k page size) */
++
+#ifndef __YAFFS_NANDEMUL2K_H__
+#define __YAFFS_NANDEMUL2K_H__
+
+int nandemul2k_GetNumberOfBlocks(void);
+
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_nand.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_nand.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_nand.h 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,43 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,52 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
+ */
+
-+#ifndef __YAFFS_NAND_H__
-+#define __YAFFS_NAND_H__
-+#include "yaffs_guts.h"
-+
-+
-+
-+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
-+ __u8 * buffer,
-+ yaffs_ExtendedTags * tags);
-+
-+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
-+ int chunkInNAND,
-+ const __u8 * buffer,
-+ yaffs_ExtendedTags * tags);
-+
-+int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
-+
-+int yaffs_QueryInitialBlockState(yaffs_Device * dev,
-+ int blockNo,
-+ yaffs_BlockState * state,
-+ unsigned *sequenceNumber);
-+
-+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
-+ int blockInNAND);
-+
-+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
-+
-+#endif
-+
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags1.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags1.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags1.c 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,39 @@
+#include "yaffs_packedtags1.h"
+#include "yportenv.h"
+
+
+ }
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags1.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags1.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags1.h 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,22 @@
-+// This is used to pack YAFFS1 tags, not YAFFS2 tags.
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,37 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
+
+#ifndef __YAFFS_PACKEDTAGS1_H__
+#define __YAFFS_PACKEDTAGS1_H__
+void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t);
+void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt);
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags2.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags2.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags2.c 2007-05-26 21:13:40.734658056 +0200
-@@ -0,0 +1,184 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,182 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * yaffs_packedtags2.c: Tags packing for YAFFS2
-+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU Lesser General Public License
-+ * version 2.1 as published by the Free Software Foundation.
++ * 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.
+ */
+
+#include "yaffs_packedtags2.h"
+ yaffs_DumpTags2(t);
+
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags2.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags2.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_packedtags2.h 2007-05-26 21:13:40.735657904 +0200
-@@ -0,0 +1,23 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,38 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
+
+#ifndef __YAFFS_PACKEDTAGS2_H__
+void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t);
+void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt);
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_qsort.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_qsort.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_qsort.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_qsort.c 2007-05-26 21:13:40.735657904 +0200
-@@ -0,0 +1,156 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
+}
+
++#ifndef min
+#define min(a,b) (((a) < (b)) ? (a) : (b))
++#endif
++
+void
-+qsort(void *aa, size_t n, size_t es, int (*cmp)(const void *, const void *))
++yaffs_qsort(void *aa, size_t n, size_t es,
++ int (*cmp)(const void *, const void *))
+{
+ char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
+ int d, r, swaptype, swap_cnt;
+ r = min((long)(pd - pc), (long)(pn - pd - es));
+ vecswap(pb, pn - r, r);
+ if ((r = pb - pa) > es)
-+ qsort(a, r / es, es, cmp);
++ yaffs_qsort(a, r / es, es, cmp);
+ if ((r = pd - pc) > es) {
+ /* Iterate rather than recurse to save stack space */
+ a = pn - r;
+ n = r / es;
+ goto loop;
+ }
-+/* qsort(pn - r, r / es, es, cmp);*/
++/* yaffs_qsort(pn - r, r / es, es, cmp);*/
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_qsort.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_qsort.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_qsort.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_qsort.h 2007-05-26 21:13:40.735657904 +0200
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h 2007-05-30 13:17:17.000000000 +0200
@@ -0,0 +1,23 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_qsort.h: Interface to BSD-licensed qsort routine.
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ * $Id: yaffs_qsort.h,v 1.2 2006/11/07 23:20:09 charles Exp $
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
++
+#ifndef __YAFFS_QSORT_H__
+#define __YAFFS_QSORT_H__
+
-+extern void qsort (void *const base, size_t total_elems, size_t size,
++extern void yaffs_qsort (void *const base, size_t total_elems, size_t size,
+ int (*cmp)(const void *, const void *));
+
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_tagscompat.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagscompat.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagscompat.c 2007-05-26 21:13:40.736657752 +0200
-@@ -0,0 +1,532 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,530 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_tagscompat.h: Tags compatability layer to use YAFFS1 formatted NAND.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
-+ * $Id: yaffs_tagscompat.c,v 1.8 2005/11/29 20:54:32 marty Exp $
+ */
+
+#include "yaffs_guts.h"
+ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
+};
+
-+static int yaffs_CountBits(__u8 x)
++int yaffs_CountBits(__u8 x)
+{
+ int retVal;
+ retVal = yaffs_countBitsTable[x];
+
+ return YAFFS_OK;
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_tagscompat.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagscompat.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagscompat.h 2007-05-26 21:13:40.736657752 +0200
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h 2007-05-30 13:17:17.000000000 +0200
@@ -0,0 +1,40 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yaffs_ramdisk.h: yaffs ram disk component
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ * $Id: yaffs_tagscompat.h,v 1.2 2005/08/11 02:33:03 marty Exp $
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
-+/* This provides a ram disk under yaffs.
-+ * NB this is not intended for NAND emulation.
-+ * Use this with dev->useNANDECC enabled, then ECC overheads are not required.
-+ */
+#ifndef __YAFFS_TAGSCOMPAT_H__
+#define __YAFFS_TAGSCOMPAT_H__
+
+ int blockNo, yaffs_BlockState *
+ state, int *sequenceNumber);
+
-+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagsvalidity.c
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_tagsvalidity.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagsvalidity.c 2007-05-26 21:13:40.736657752 +0200
-@@ -0,0 +1,31 @@
++void yaffs_CalcTagsECC(yaffs_Tags * tags);
++int yaffs_CheckECCOnTags(yaffs_Tags * tags);
++int yaffs_CountBits(__u8 byte);
+
++#endif
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c
+--- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,28 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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.
-+ *
-+ * $Id: yaffs_tagsvalidity.c,v 1.2 2005/08/11 02:33:03 marty Exp $
+ */
+
+#include "yaffs_tagsvalidity.h"
+ tags->validMarker1 == 0x55555555);
+
+}
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagsvalidity.h
---- linux-2.6.21.1.old/fs/yaffs2/yaffs_tagsvalidity.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yaffs_tagsvalidity.h 2007-05-26 21:13:40.736657752 +0200
-@@ -0,0 +1,25 @@
-+
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h
+--- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,24 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@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
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ * $Id: yaffs_tagsvalidity.h,v 1.2 2005/08/11 02:33:03 marty Exp $
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
-+//yaffs_tagsvalidity.h
++
+
+#ifndef __YAFFS_TAGS_VALIDITY_H__
+#define __YAFFS_TAGS_VALIDITY_H__
+void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
+int yaffs_ValidateTags(yaffs_ExtendedTags * tags);
+#endif
-diff -urN linux-2.6.21.1.old/fs/yaffs2/yportenv.h linux-2.6.21.1.dev/fs/yaffs2/yportenv.h
---- linux-2.6.21.1.old/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1.dev/fs/yaffs2/yportenv.h 2007-05-26 21:13:40.736657752 +0200
-@@ -0,0 +1,165 @@
+diff -urN linux-2.6.21.1/fs/yaffs2/yaffsinterface.h linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h
+--- linux-2.6.21.1/fs/yaffs2/yaffsinterface.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h 2007-05-30 13:17:16.000000000 +0200
+@@ -0,0 +1,21 @@
+/*
-+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
-+ * yportenv.h: Portable services used by yaffs. This is done to allow
-+ * simple migration from kernel space into app space for testing.
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
-+ * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
-+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFSINTERFACE_H__
++#define __YAFFSINTERFACE_H__
++
++int yaffs_Initialise(unsigned nBlocks);
++
++#endif
+diff -urN linux-2.6.21.1/fs/yaffs2/yportenv.h linux-2.6.21.1.new/fs/yaffs2/yportenv.h
+--- linux-2.6.21.1/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/fs/yaffs2/yportenv.h 2007-05-30 13:17:17.000000000 +0200
+@@ -0,0 +1,186 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2007 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
-+ * $Id: yportenv.h,v 1.11 2006/05/21 09:39:12 charles Exp $
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
+ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
++
+#ifndef __YPORTENV_H__
+#define __YPORTENV_H__
+
+#include "moduleconfig.h"
+
+/* Linux kernel */
-+#include <linux/autoconf.h>
-+#include <linux/kernel.h>
+#include <linux/version.h>
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
++#include <linux/config.h>
++#endif
++#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#define _Y(x) x
+#define yaffs_strcpy(a,b) strcpy(a,b)
+#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
++#define yaffs_strncmp(a,b,c) strncmp(a,b,c)
+#define yaffs_strlen(s) strlen(s)
+#define yaffs_sprintf sprintf
+#define yaffs_toupper(a) toupper(a)
+// KR - added for use in scan so processes aren't blocked indefinitely.
+#define YYIELD() schedule()
+
-+#define YAFFS_ROOT_MODE 0666
++#define YAFFS_ROOT_MODE 0666
+#define YAFFS_LOSTNFOUND_MODE 0666
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#define TSTR(x) KERN_WARNING x
+#define TOUT(p) printk p
+
++#define yaffs_trace(mask, fmt, args...) \
++ do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
++ printk(KERN_WARNING "yaffs: " fmt, ## args); \
++ } while (0)
++
++#define compile_time_assertion(assertion) \
++ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
++
+#elif defined CONFIG_YAFFS_DIRECT
+
+/* Direct interface */
+
+#endif
+
-+extern unsigned yaffs_traceMask;
++/* see yaffs_fs.c */
++extern unsigned int yaffs_traceMask;
++extern unsigned int yaffs_wr_attempts;
+
-+#define YAFFS_TRACE_ERROR 0x00000001
++/*
++ * Tracing flags.
++ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
++ */
++
+#define YAFFS_TRACE_OS 0x00000002
+#define YAFFS_TRACE_ALLOCATE 0x00000004
+#define YAFFS_TRACE_SCAN 0x00000008
+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
+#define YAFFS_TRACE_MTD 0x00004000
+#define YAFFS_TRACE_CHECKPOINT 0x00008000
-+#define YAFFS_TRACE_ALWAYS 0x40000000
++
++#define YAFFS_TRACE_VERIFY 0x00010000
++#define YAFFS_TRACE_VERIFY_NAND 0x00020000
++#define YAFFS_TRACE_VERIFY_FULL 0x00040000
++#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
++
++
++#define YAFFS_TRACE_ERROR 0x40000000
+#define YAFFS_TRACE_BUG 0x80000000
++#define YAFFS_TRACE_ALWAYS 0xF0000000
++
+
-+#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ERROR)) TOUT(p);} while(0)
++#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0)
+
+#ifndef CONFIG_YAFFS_WINCE
+#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__))
+#endif
+
+#endif
+--- linux-2.6.21.1/fs/Makefile 2007-05-30 13:16:21.000000000 +0200
++++ linux-2.6.21.1.new/fs/Makefile 2007-05-30 13:27:34.000000000 +0200
+@@ -116,3 +116,4 @@
+ obj-$(CONFIG_DEBUG_FS) += debugfs/
+ obj-$(CONFIG_OCFS2_FS) += ocfs2/
+ obj-$(CONFIG_GFS2_FS) += gfs2/
++obj-$(CONFIG_YAFFS_FS) += yaffs2/
+--- linux-2.6.21.1/fs/Kconfig 2007-05-30 13:16:21.000000000 +0200
++++ linux-2.6.21.1.new/fs/Kconfig 2007-05-30 13:29:14.000000000 +0200
+@@ -419,6 +419,7 @@
+
+ source "fs/xfs/Kconfig"
+ source "fs/gfs2/Kconfig"
++source "fs/yaffs2/Kconfig"
+
+ config OCFS2_FS
+ tristate "OCFS2 file system support"
projects / openwrt / svn-archive / archive.git / blobdiff