--- /dev/null
+diff -Nrup a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h
+--- a/fs/yaffs2/devextras.h 2010-10-03 17:48:22.704000363 +0300
++++ b/fs/yaffs2/devextras.h 2010-10-03 18:03:47.537000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -24,6 +24,8 @@
+ #define __EXTRAS_H__
+
+
++#include "yportenv.h"
++
+ #if !(defined __KERNEL__)
+
+ /* Definition of types */
+@@ -33,103 +35,6 @@ typedef unsigned __u32;
+
+ #endif
+
+-/*
+- * This is a simple doubly linked list implementation that matches the
+- * way the Linux kernel doubly linked list implementation works.
+- */
+-
+-struct ylist_head {
+- struct ylist_head *next; /* next in chain */
+- struct ylist_head *prev; /* previous in chain */
+-};
+-
+-
+-/* Initialise a static list */
+-#define YLIST_HEAD(name) \
+-struct ylist_head name = { &(name), &(name)}
+-
+-
+-
+-/* Initialise a list head to an empty list */
+-#define YINIT_LIST_HEAD(p) \
+-do { \
+- (p)->next = (p);\
+- (p)->prev = (p); \
+-} while (0)
+-
+-
+-/* Add an element to a list */
+-static __inline__ void ylist_add(struct ylist_head *newEntry,
+- struct ylist_head *list)
+-{
+- struct ylist_head *listNext = list->next;
+-
+- list->next = newEntry;
+- newEntry->prev = list;
+- newEntry->next = listNext;
+- listNext->prev = newEntry;
+-
+-}
+-
+-static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+- struct ylist_head *list)
+-{
+- struct ylist_head *listPrev = list->prev;
+-
+- list->prev = newEntry;
+- newEntry->next = list;
+- newEntry->prev = listPrev;
+- listPrev->next = newEntry;
+-
+-}
+-
+-
+-/* Take an element out of its current list, with or without
+- * reinitialising the links.of the entry*/
+-static __inline__ void ylist_del(struct ylist_head *entry)
+-{
+- struct ylist_head *listNext = entry->next;
+- struct ylist_head *listPrev = entry->prev;
+-
+- listNext->prev = listPrev;
+- listPrev->next = listNext;
+-
+-}
+-
+-static __inline__ void ylist_del_init(struct ylist_head *entry)
+-{
+- ylist_del(entry);
+- entry->next = entry->prev = entry;
+-}
+-
+-
+-/* Test if the list is empty */
+-static __inline__ int ylist_empty(struct ylist_head *entry)
+-{
+- return (entry->next == entry);
+-}
+-
+-
+-/* ylist_entry takes a pointer to a list entry and offsets it to that
+- * we can find a pointer to the object it is embedded in.
+- */
+-
+-
+-#define ylist_entry(entry, type, member) \
+- ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+-
+-
+-/* ylist_for_each and list_for_each_safe iterate over lists.
+- * ylist_for_each_safe uses temporary storage to make the list delete safe
+- */
+-
+-#define ylist_for_each(itervar, list) \
+- for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
+-
+-#define ylist_for_each_safe(itervar, saveVar, list) \
+- for (itervar = (list)->next, saveVar = (list)->next->next; \
+- itervar != (list); itervar = saveVar, saveVar = saveVar->next)
+-
+
+ #if !(defined __KERNEL__)
+
+diff -Nrup a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig
+--- a/fs/yaffs2/Kconfig 2010-10-03 17:48:22.704000363 +0300
++++ b/fs/yaffs2/Kconfig 2010-10-03 18:03:47.461000368 +0300
+@@ -90,23 +90,15 @@ config YAFFS_AUTO_YAFFS2
+
+ If unsure, say Y.
+
+-config YAFFS_DISABLE_LAZY_LOAD
+- bool "Disable lazy loading"
+- depends on YAFFS_YAFFS2
++config YAFFS_DISABLE_TAGS_ECC
++ bool "Disable YAFFS from doing ECC on tags by default"
++ depends on YAFFS_FS && 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.
++ This defaults Yaffs to using its own ECC calculations on tags instead of
++ just relying on the MTD.
++ This behavior can also be overridden with tags_ecc_on and
++ tags_ecc_off mount options.
+
+ If unsure, say N.
+
+@@ -154,3 +146,45 @@ config YAFFS_SHORT_NAMES_IN_RAM
+ but makes look-ups faster.
+
+ If unsure, say Y.
++
++config YAFFS_EMPTY_LOST_AND_FOUND
++ bool "Empty lost and found on boot"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is enabled then the contents of lost and found is
++ automatically dumped at mount.
++
++ If unsure, say N.
++
++config YAFFS_DISABLE_BLOCK_REFRESHING
++ bool "Disable yaffs2 block refreshing"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is set, then block refreshing is disabled.
++ Block refreshing infrequently refreshes the oldest block in
++ a yaffs2 file system. This mechanism helps to refresh flash to
++ mitigate against data loss. This is particularly useful for MLC.
++
++ If unsure, say N.
++
++config YAFFS_DISABLE_BACKGROUND
++ bool "Disable yaffs2 background processing"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is set, then background processing is disabled.
++ Background processing makes many foreground activities faster.
++
++ If unsure, say N.
++
++config YAFFS_XATTR
++ bool "Enable yaffs2 xattr support"
++ depends on YAFFS_FS
++ default y
++ help
++ If this is set then yaffs2 will provide xattr support.
++ If unsure, say Y.
++
++
+diff -Nrup a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile
+--- a/fs/yaffs2/Makefile 2010-10-03 17:48:22.705000363 +0300
++++ b/fs/yaffs2/Makefile 2010-10-03 18:03:47.460000369 +0300
+@@ -4,7 +4,14 @@
+
+ obj-$(CONFIG_YAFFS_FS) += yaffs.o
+
+-yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
+-yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
++yaffs-y := yaffs_ecc.o yaffs_vfs_glue.o yaffs_guts.o yaffs_checkptrw.o
++yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
+ yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
+ yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
++yaffs-y += yaffs_nameval.o
++yaffs-y += yaffs_allocator.o
++yaffs-y += yaffs_yaffs1.o
++yaffs-y += yaffs_yaffs2.o
++yaffs-y += yaffs_bitmap.o
++yaffs-y += yaffs_verify.o
++
+diff -Nrup a/fs/yaffs2/moduleconfig.h b/fs/yaffs2/moduleconfig.h
+--- a/fs/yaffs2/moduleconfig.h 2010-10-03 17:48:22.705000363 +0300
++++ b/fs/yaffs2/moduleconfig.h 2010-10-03 18:03:47.538000366 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Martin Fouts <Martin.Fouts@palmsource.com>
+@@ -29,22 +29,43 @@
+ /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
+ /* #define CONFIG_YAFFS_DOES_ECC */
+
++/* Default: Selected */
++/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */
++#define CONFIG_YAFFS_DOES_TAGS_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: Not selected */
++/* Meaning: Always test whether chunks are erased before writing to them.
++ Use during mtd debugging and init. */
++/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */
++
++/* Default: Not Selected */
++/* Meaning: At mount automatically empty all files from lost and found. */
++/* This is done to fix an old problem where rmdir was not checking for an */
++/* empty directory. This can also be achieved with a mount option. */
++#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
+
+ /* Default: Selected */
+ /* Meaning: Cache short names, taking more RAM, but faster look-ups */
+ #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+
+-/* Default: 10 */
+-/* Meaning: set the count of blocks to reserve for checkpointing */
+-#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
++/* Default: Unselected */
++/* Meaning: Select to disable block refreshing. */
++/* Block Refreshing periodically rewrites the oldest block. */
++/* #define CONFIG_DISABLE_BLOCK_REFRESHING */
++
++/* Default: Unselected */
++/* Meaning: Select to disable background processing */
++/* #define CONFIG_DISABLE_BACKGROUND */
++
++
++/* Default: Selected */
++/* Meaning: Enable XATTR support */
++#define CONFIG_YAFFS_XATTR
+
+ /*
+ Older-style on-NAND data format has a "pageStatus" byte to record
+diff -Nrup a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c
+--- a/fs/yaffs2/yaffs_allocator.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_allocator.c 2010-10-03 18:03:47.504000356 +0300
+@@ -0,0 +1,409 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 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.
++ */
++
++
++#include "yaffs_allocator.h"
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yportenv.h"
++
++#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
++
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
++{
++ return (yaffs_Tnode *)YMALLOC(dev->tnodeSize);
++}
++
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ dev = dev;
++ YFREE(tn);
++}
++
++void yaffs_InitialiseRawObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
++{
++ dev = dev;
++ return (yaffs_Object *) YMALLOC(sizeof(yaffs_Object));
++}
++
++
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
++{
++
++ dev = dev;
++ YFREE(obj);
++}
++
++#else
++
++struct yaffs_TnodeList_struct {
++ struct yaffs_TnodeList_struct *next;
++ yaffs_Tnode *tnodes;
++};
++
++typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
++
++struct yaffs_ObjectList_struct {
++ yaffs_Object *objects;
++ struct yaffs_ObjectList_struct *next;
++};
++
++typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
++
++
++struct yaffs_AllocatorStruct {
++ int nTnodesCreated;
++ yaffs_Tnode *freeTnodes;
++ int nFreeTnodes;
++ yaffs_TnodeList *allocatedTnodeList;
++
++ int nObjectsCreated;
++ yaffs_Object *freeObjects;
++ int nFreeObjects;
++
++ yaffs_ObjectList *allocatedObjectList;
++};
++
++typedef struct yaffs_AllocatorStruct yaffs_Allocator;
++
++
++static void yaffs_DeinitialiseRawTnodes(yaffs_Device *dev)
++{
++
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++
++ yaffs_TnodeList *tmp;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ while (allocator->allocatedTnodeList) {
++ tmp = allocator->allocatedTnodeList->next;
++
++ YFREE(allocator->allocatedTnodeList->tnodes);
++ YFREE(allocator->allocatedTnodeList);
++ allocator->allocatedTnodeList = tmp;
++
++ }
++
++ allocator->freeTnodes = NULL;
++ allocator->nFreeTnodes = 0;
++ allocator->nTnodesCreated = 0;
++}
++
++static void yaffs_InitialiseRawTnodes(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(allocator){
++ allocator->allocatedTnodeList = NULL;
++ allocator->freeTnodes = NULL;
++ allocator->nFreeTnodes = 0;
++ allocator->nTnodesCreated = 0;
++ } else
++ YBUG();
++}
++
++static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
++{
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++ int i;
++ yaffs_Tnode *newTnodes;
++ __u8 *mem;
++ yaffs_Tnode *curr;
++ yaffs_Tnode *next;
++ yaffs_TnodeList *tnl;
++
++ if(!allocator){
++ YBUG();
++ return YAFFS_FAIL;
++ }
++
++ if (nTnodes < 1)
++ return YAFFS_OK;
++
++
++ /* make these things */
++
++ newTnodes = YMALLOC(nTnodes * dev->tnodeSize);
++ mem = (__u8 *)newTnodes;
++
++ if (!newTnodes) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* New hookup for wide tnodes */
++ for (i = 0; i < nTnodes - 1; i++) {
++ curr = (yaffs_Tnode *) &mem[i * dev->tnodeSize];
++ next = (yaffs_Tnode *) &mem[(i+1) * dev->tnodeSize];
++ curr->internal[0] = next;
++ }
++
++ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * dev->tnodeSize];
++ curr->internal[0] = allocator->freeTnodes;
++ allocator->freeTnodes = (yaffs_Tnode *)mem;
++
++ allocator->nFreeTnodes += nTnodes;
++ allocator->nTnodesCreated += nTnodes;
++
++ /* Now add this bunch of tnodes to a list for freeing up.
++ * NB If we can't add this to the management list it isn't fatal
++ * but it just means we can't free this bunch of tnodes later.
++ */
++
++ tnl = YMALLOC(sizeof(yaffs_TnodeList));
++ if (!tnl) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs: Could not add tnodes to management list" TENDSTR)));
++ return YAFFS_FAIL;
++ } else {
++ tnl->tnodes = newTnodes;
++ tnl->next = allocator->allocatedTnodeList;
++ allocator->allocatedTnodeList = tnl;
++ }
++
++ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++ yaffs_Tnode *tn = NULL;
++
++ if(!allocator){
++ YBUG();
++ return NULL;
++ }
++
++ /* If there are none left make more */
++ if (!allocator->freeTnodes)
++ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
++
++ if (allocator->freeTnodes) {
++ tn = allocator->freeTnodes;
++ allocator->freeTnodes = allocator->freeTnodes->internal[0];
++ allocator->nFreeTnodes--;
++ }
++
++ return tn;
++}
++
++/* FreeTnode frees up a tnode and puts it back on the free list */
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ if (tn) {
++ tn->internal[0] = allocator->freeTnodes;
++ allocator->freeTnodes = tn;
++ allocator->nFreeTnodes++;
++ }
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
++
++
++
++static void yaffs_InitialiseRawObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(allocator) {
++ allocator->allocatedObjectList = NULL;
++ allocator->freeObjects = NULL;
++ allocator->nFreeObjects = 0;
++ } else
++ YBUG();
++}
++
++static void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ yaffs_ObjectList *tmp;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ while (allocator->allocatedObjectList) {
++ tmp = allocator->allocatedObjectList->next;
++ YFREE(allocator->allocatedObjectList->objects);
++ YFREE(allocator->allocatedObjectList);
++
++ allocator->allocatedObjectList = tmp;
++ }
++
++ allocator->freeObjects = NULL;
++ allocator->nFreeObjects = 0;
++ allocator->nObjectsCreated = 0;
++}
++
++
++static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ int i;
++ yaffs_Object *newObjects;
++ yaffs_ObjectList *list;
++
++ if(!allocator){
++ YBUG();
++ return YAFFS_FAIL;
++ }
++
++ if (nObjects < 1)
++ return YAFFS_OK;
++
++ /* make these things */
++ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
++ list = YMALLOC(sizeof(yaffs_ObjectList));
++
++ if (!newObjects || !list) {
++ if (newObjects){
++ YFREE(newObjects);
++ newObjects = NULL;
++ }
++ if (list){
++ YFREE(list);
++ list = NULL;
++ }
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Hook them into the free list */
++ for (i = 0; i < nObjects - 1; i++) {
++ newObjects[i].siblings.next =
++ (struct ylist_head *)(&newObjects[i + 1]);
++ }
++
++ newObjects[nObjects - 1].siblings.next = (void *)allocator->freeObjects;
++ allocator->freeObjects = newObjects;
++ allocator->nFreeObjects += nObjects;
++ allocator->nObjectsCreated += nObjects;
++
++ /* Now add this bunch of Objects to a list for freeing up. */
++
++ list->objects = newObjects;
++ list->next = allocator->allocatedObjectList;
++ allocator->allocatedObjectList = list;
++
++ return YAFFS_OK;
++}
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
++{
++ yaffs_Object *obj = NULL;
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator) {
++ YBUG();
++ return obj;
++ }
++
++ /* If there are none left make more */
++ if (!allocator->freeObjects)
++ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
++
++ if (allocator->freeObjects) {
++ obj = allocator->freeObjects;
++ allocator->freeObjects =
++ (yaffs_Object *) (allocator->freeObjects->siblings.next);
++ allocator->nFreeObjects--;
++ }
++
++ return obj;
++}
++
++
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
++{
++
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator)
++ YBUG();
++ else {
++ /* Link into the free list. */
++ obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
++ allocator->freeObjects = obj;
++ allocator->nFreeObjects++;
++ }
++}
++
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ if(dev->allocator){
++ yaffs_DeinitialiseRawTnodes(dev);
++ yaffs_DeinitialiseRawObjects(dev);
++
++ YFREE(dev->allocator);
++ dev->allocator=NULL;
++ } else
++ YBUG();
++}
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator;
++
++ if(!dev->allocator){
++ allocator = YMALLOC(sizeof(yaffs_Allocator));
++ if(allocator){
++ dev->allocator = allocator;
++ yaffs_InitialiseRawTnodes(dev);
++ yaffs_InitialiseRawObjects(dev);
++ }
++ } else
++ YBUG();
++}
++
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h
+--- a/fs/yaffs2/yaffs_allocator.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_allocator.h 2010-10-03 18:03:47.538000366 +0300
+@@ -0,0 +1,30 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 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_ALLOCATOR_H__
++#define __YAFFS_ALLOCATOR_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev);
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev);
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev);
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn);
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev);
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj);
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c
+--- a/fs/yaffs2/yaffs_bitmap.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_bitmap.c 2010-10-03 18:03:47.505000364 +0300
+@@ -0,0 +1,105 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 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.
++ */
++
++#include "yaffs_bitmap.h"
++#include "yaffs_trace.h"
++/*
++ * Chunk bitmap manipulations
++ */
++
++static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
++ blk));
++ YBUG();
++ }
++ return dev->chunkBits +
++ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
++}
++
++void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
++ chunk < 0 || chunk >= dev->param.nChunksPerBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
++ blk, chunk));
++ YBUG();
++ }
++}
++
++void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ memset(blkBits, 0, dev->chunkBitmapStride);
++}
++
++void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++}
++
++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));
++}
++
++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;
++}
++
++int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ if (*blkBits)
++ return 1;
++ blkBits++;
++ }
++ return 0;
++}
++
++int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
++{
++ __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;
++}
++
+diff -Nrup a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h
+--- a/fs/yaffs2/yaffs_bitmap.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_bitmap.h 2010-10-03 18:03:47.539000363 +0300
+@@ -0,0 +1,31 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 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.
++ */
++
++/*
++ * Chunk bitmap manipulations
++ */
++
++#ifndef __YAFFS_BITMAP_H__
++#define __YAFFS_BITMAP_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk);
++void yaffs_ClearChunkBits(yaffs_Device *dev, int blk);
++void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk);
++void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk);
++int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk);
++int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk);
++int yaffs_CountChunkBits(yaffs_Device *dev, int blk);
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c
+--- a/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 18:03:47.505000364 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,16 +11,12 @@
+ * published by the Free Software Foundation.
+ */
+
+-const char *yaffs_checkptrw_c_version =
+- "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
+-
+-
+ #include "yaffs_checkptrw.h"
+ #include "yaffs_getblockinfo.h"
+
+-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
++static int yaffs2_CheckpointSpaceOk(yaffs_Device *dev)
+ {
+- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
+
+ T(YAFFS_TRACE_CHECKPOINT,
+ (TSTR("checkpt blocks available = %d" TENDSTR),
+@@ -30,11 +26,11 @@ static int yaffs_CheckpointSpaceOk(yaffs
+ }
+
+
+-static int yaffs_CheckpointErase(yaffs_Device *dev)
++static int yaffs2_CheckpointErase(yaffs_Device *dev)
+ {
+ int i;
+
+- if (!dev->eraseBlockInNAND)
++ if (!dev->param.eraseBlockInNAND)
+ return 0;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
+ dev->internalStartBlock, dev->internalEndBlock));
+@@ -43,12 +39,15 @@ static int yaffs_CheckpointErase(yaffs_D
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
+- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
++
++ dev->nBlockErasures++;
++
++ if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+- dev->nFreeChunks += dev->nChunksPerBlock;
++ dev->nFreeChunks += dev->param.nChunksPerBlock;
+ } else {
+- dev->markNANDBlockBad(dev, i);
++ dev->param.markNANDBlockBad(dev, i);
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ }
+ }
+@@ -60,13 +59,13 @@ static int yaffs_CheckpointErase(yaffs_D
+ }
+
+
+-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
++static void yaffs2_CheckpointFindNextErasedBlock(yaffs_Device *dev)
+ {
+ int i;
+- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
+ T(YAFFS_TRACE_CHECKPOINT,
+ (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
+- dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
++ dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
+
+ if (dev->checkpointNextBlock >= 0 &&
+ dev->checkpointNextBlock <= dev->internalEndBlock &&
+@@ -88,7 +87,7 @@ static void yaffs_CheckpointFindNextEras
+ dev->checkpointCurrentBlock = -1;
+ }
+
+-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
++static void yaffs2_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
+ {
+ int i;
+ yaffs_ExtendedTags tags;
+@@ -98,10 +97,10 @@ static void yaffs_CheckpointFindNextChec
+
+ if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
+ for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
+- int chunk = i * dev->nChunksPerBlock;
++ int chunk = i * dev->param.nChunksPerBlock;
+ int realignedChunk = chunk - dev->chunkOffset;
+
+- dev->readChunkWithTagsFromNAND(dev, realignedChunk,
++ dev->param.readChunkWithTagsFromNAND(dev, realignedChunk,
+ NULL, &tags);
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
+ i, tags.objectId, tags.sequenceNumber, tags.eccResult));
+@@ -124,29 +123,29 @@ static void yaffs_CheckpointFindNextChec
+ }
+
+
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
++int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting)
+ {
+
++
++ dev->checkpointOpenForWrite = forWriting;
++
+ /* Got the functions we need? */
+- if (!dev->writeChunkWithTagsToNAND ||
+- !dev->readChunkWithTagsFromNAND ||
+- !dev->eraseBlockInNAND ||
+- !dev->markNANDBlockBad)
++ if (!dev->param.writeChunkWithTagsToNAND ||
++ !dev->param.readChunkWithTagsFromNAND ||
++ !dev->param.eraseBlockInNAND ||
++ !dev->param.markNANDBlockBad)
+ return 0;
+
+- if (forWriting && !yaffs_CheckpointSpaceOk(dev))
++ if (forWriting && !yaffs2_CheckpointSpaceOk(dev))
+ return 0;
+
+ if (!dev->checkpointBuffer)
+- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
++ dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk);
+ if (!dev->checkpointBuffer)
+ return 0;
+
+
+ dev->checkpointPageSequence = 0;
+-
+- dev->checkpointOpenForWrite = forWriting;
+-
+ dev->checkpointByteCount = 0;
+ dev->checkpointSum = 0;
+ dev->checkpointXor = 0;
+@@ -158,7 +157,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ if (forWriting) {
+ memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
+ dev->checkpointByteOffset = 0;
+- return yaffs_CheckpointErase(dev);
++ return yaffs2_CheckpointErase(dev);
+ } else {
+ int i;
+ /* Set to a value that will kick off a read */
+@@ -168,6 +167,9 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ dev->blocksInCheckpoint = 0;
+ dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
+ dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
++ if(!dev->checkpointBlockList)
++ return 0;
++
+ for (i = 0; i < dev->checkpointMaxBlocks; i++)
+ dev->checkpointBlockList[i] = -1;
+ }
+@@ -175,7 +177,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ return 1;
+ }
+
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
++int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
+ {
+ __u32 compositeSum;
+ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
+@@ -183,7 +185,7 @@ int yaffs_GetCheckpointSum(yaffs_Device
+ return 1;
+ }
+
+-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
++static int yaffs2_CheckpointFlushBuffer(yaffs_Device *dev)
+ {
+ int chunk;
+ int realignedChunk;
+@@ -191,7 +193,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ yaffs_ExtendedTags tags;
+
+ if (dev->checkpointCurrentBlock < 0) {
+- yaffs_CheckpointFindNextErasedBlock(dev);
++ yaffs2_CheckpointFindNextErasedBlock(dev);
+ dev->checkpointCurrentChunk = 0;
+ }
+
+@@ -211,7 +213,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ dev->blocksInCheckpoint++;
+ }
+
+- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
++ chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk;
+
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
+@@ -219,12 +221,14 @@ static int yaffs_CheckpointFlushBuffer(y
+
+ realignedChunk = chunk - dev->chunkOffset;
+
+- dev->writeChunkWithTagsToNAND(dev, realignedChunk,
++ dev->nPageWrites++;
++
++ dev->param.writeChunkWithTagsToNAND(dev, realignedChunk,
+ dev->checkpointBuffer, &tags);
+ dev->checkpointByteOffset = 0;
+ dev->checkpointPageSequence++;
+ dev->checkpointCurrentChunk++;
+- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
++ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) {
+ dev->checkpointCurrentChunk = 0;
+ dev->checkpointCurrentBlock = -1;
+ }
+@@ -234,7 +238,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ }
+
+
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
++int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
+ {
+ int i = 0;
+ int ok = 1;
+@@ -263,13 +267,13 @@ int yaffs_CheckpointWrite(yaffs_Device *
+
+ if (dev->checkpointByteOffset < 0 ||
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
+- ok = yaffs_CheckpointFlushBuffer(dev);
++ ok = yaffs2_CheckpointFlushBuffer(dev);
+ }
+
+ return i;
+ }
+
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
++int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
+ {
+ int i = 0;
+ int ok = 1;
+@@ -294,7 +298,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
+
+ if (dev->checkpointCurrentBlock < 0) {
+- yaffs_CheckpointFindNextCheckpointBlock(dev);
++ yaffs2_CheckpointFindNextCheckpointBlock(dev);
+ dev->checkpointCurrentChunk = 0;
+ }
+
+@@ -302,14 +306,16 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ ok = 0;
+ else {
+ chunk = dev->checkpointCurrentBlock *
+- dev->nChunksPerBlock +
++ dev->param.nChunksPerBlock +
+ dev->checkpointCurrentChunk;
+
+ realignedChunk = chunk - dev->chunkOffset;
++
++ dev->nPageReads++;
+
+ /* read in the next chunk */
+ /* printf("read checkpoint page %d\n",dev->checkpointPage); */
+- dev->readChunkWithTagsFromNAND(dev,
++ dev->param.readChunkWithTagsFromNAND(dev,
+ realignedChunk,
+ dev->checkpointBuffer,
+ &tags);
+@@ -323,7 +329,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ dev->checkpointPageSequence++;
+ dev->checkpointCurrentChunk++;
+
+- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
++ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock)
+ dev->checkpointCurrentBlock = -1;
+ }
+ }
+@@ -342,17 +348,20 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ return i;
+ }
+
+-int yaffs_CheckpointClose(yaffs_Device *dev)
++int yaffs2_CheckpointClose(yaffs_Device *dev)
+ {
+
+ if (dev->checkpointOpenForWrite) {
+ if (dev->checkpointByteOffset != 0)
+- yaffs_CheckpointFlushBuffer(dev);
+- } else {
++ yaffs2_CheckpointFlushBuffer(dev);
++ } else if(dev->checkpointBlockList){
+ int i;
+ for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
+- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
++ int blk = dev->checkpointBlockList[i];
++ yaffs_BlockInfo *bi = NULL;
++ if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock)
++ bi = yaffs_GetBlockInfo(dev, blk);
++ if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
+ else {
+ /* Todo this looks odd... */
+@@ -362,7 +371,7 @@ int yaffs_CheckpointClose(yaffs_Device *
+ dev->checkpointBlockList = NULL;
+ }
+
+- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
++ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock;
+ dev->nErasedBlocks -= dev->blocksInCheckpoint;
+
+
+@@ -378,16 +387,14 @@ int yaffs_CheckpointClose(yaffs_Device *
+ return 0;
+ }
+
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
++int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev)
+ {
+- /* Erase the first checksum block */
+-
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
++ /* Erase the checkpoint data */
+
+- if (!yaffs_CheckpointSpaceOk(dev))
+- return 0;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
++ dev->blocksInCheckpoint));
+
+- return yaffs_CheckpointErase(dev);
++ return yaffs2_CheckpointErase(dev);
+ }
+
+
+diff -Nrup a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h
+--- a/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 18:03:47.540000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -18,18 +18,17 @@
+
+ #include "yaffs_guts.h"
+
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
++int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting);
+
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
++int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
+
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
++int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
+
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
++int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
+
+-int yaffs_CheckpointClose(yaffs_Device *dev);
++int yaffs2_CheckpointClose(yaffs_Device *dev);
+
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
++int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev);
+
+
+ #endif
+-
+diff -Nrup a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c
+--- a/fs/yaffs2/yaffs_ecc.c 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_ecc.c 2010-10-03 18:03:47.509000373 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -28,9 +28,6 @@
+ * this bytes influence on the line parity.
+ */
+
+-const char *yaffs_ecc_c_version =
+- "$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
+-
+ #include "yportenv.h"
+
+ #include "yaffs_ecc.h"
+diff -Nrup a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h
+--- a/fs/yaffs2/yaffs_ecc.h 2010-10-03 17:48:22.707000363 +0300
++++ b/fs/yaffs2/yaffs_ecc.h 2010-10-03 18:03:47.541000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_fs.c b/fs/yaffs2/yaffs_fs.c
+--- a/fs/yaffs2/yaffs_fs.c 2010-10-03 17:48:22.708000363 +0300
++++ b/fs/yaffs2/yaffs_fs.c 1970-01-01 02:00:00.000000000 +0200
+@@ -1,2529 +0,0 @@
+-/*
+- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+- *
+- * Copyright (C) 2002-2009 Aleph One Ltd.
+- * for Toby Churchill Ltd and Brightstar Engineering
+- *
+- * Created by Charles Manning <charles@aleph1.co.uk>
+- * Acknowledgements:
+- * Luc van OostenRyck for numerous patches.
+- * Nick Bane for numerous patches.
+- * Nick Bane for 2.5/2.6 integration.
+- * Andras Toth for mknod rdev issue.
+- * Michael Fischer for finding the problem with inode inconsistency.
+- * Some code bodily lifted from JFFS
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License version 2 as
+- * published by the Free Software Foundation.
+- */
+-
+-/*
+- *
+- * This is the file system front-end to YAFFS that hooks it up to
+- * the VFS.
+- *
+- * Special notes:
+- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
+- * this superblock
+- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
+- * superblock
+- * >> inode->u.generic_ip points to the associated yaffs_Object.
+- */
+-
+-const char *yaffs_fs_c_version =
+- "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
+-extern const char *yaffs_guts_c_version;
+-
+-#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/slab.h>
+-#include <linux/init.h>
+-#include <linux/fs.h>
+-#include <linux/proc_fs.h>
+-#include <linux/smp_lock.h>
+-#include <linux/pagemap.h>
+-#include <linux/mtd/mtd.h>
+-#include <linux/interrupt.h>
+-#include <linux/string.h>
+-#include <linux/ctype.h>
+-
+-#include "asm/div64.h"
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-#include <linux/statfs.h> /* Added NCB 15-8-2003 */
+-#include <linux/statfs.h>
+-#define UnlockPage(p) unlock_page(p)
+-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
+-
+-/* FIXME: use sb->s_id instead ? */
+-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
+-
+-#else
+-
+-#include <linux/locks.h>
+-#define BDEVNAME_SIZE 0
+-#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
+-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+-#define __user
+-#endif
+-
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+-#define YPROC_ROOT (&proc_root)
+-#else
+-#define YPROC_ROOT NULL
+-#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
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+-#define YAFFS_USE_WRITE_BEGIN_END 1
+-#else
+-#define YAFFS_USE_WRITE_BEGIN_END 0
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+-{
+- uint64_t result = partition_size;
+- do_div(result, block_size);
+- return (uint32_t)result;
+-}
+-#else
+-#define YCALCBLOCKS(s, b) ((s)/(b))
+-#endif
+-
+-#include <linux/uaccess.h>
+-
+-#include "yportenv.h"
+-#include "yaffs_guts.h"
+-
+-#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;
+-unsigned int yaffs_auto_checkpoint = 1;
+-
+-/* Module Parameters */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-module_param(yaffs_traceMask, uint, 0644);
+-module_param(yaffs_wr_attempts, uint, 0644);
+-module_param(yaffs_auto_checkpoint, uint, 0644);
+-#else
+-MODULE_PARM(yaffs_traceMask, "i");
+-MODULE_PARM(yaffs_wr_attempts, "i");
+-MODULE_PARM(yaffs_auto_checkpoint, "i");
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+-/* use iget and read_inode */
+-#define Y_IGET(sb, inum) iget((sb), (inum))
+-static void yaffs_read_inode(struct inode *inode);
+-
+-#else
+-/* Call local equivalent */
+-#define YAFFS_USE_OWN_IGET
+-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+-#endif
+-
+-/*#define T(x) printk x */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
+-#else
+-#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))
+-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
+-#else
+-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb);
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+- loff_t *pos);
+-static ssize_t yaffs_hold_space(struct file *f);
+-static void yaffs_release_space(struct file *f);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+-#else
+-static int yaffs_file_flush(struct file *file);
+-#endif
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+- int datasync);
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+- struct nameidata *n);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+- struct nameidata *n);
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
+-#endif
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+- struct dentry *dentry);
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+- const char *symname);
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- dev_t dev);
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- int dev);
+-#endif
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry);
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait);
+-static void yaffs_write_super(struct super_block *sb);
+-#else
+-static int yaffs_sync_fs(struct super_block *sb);
+-static int yaffs_write_super(struct super_block *sb);
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+-#endif
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-static void yaffs_put_inode(struct inode *inode);
+-#endif
+-
+-static void yaffs_delete_inode(struct inode *);
+-static void yaffs_clear_inode(struct inode *);
+-
+-static int yaffs_readpage(struct file *file, struct page *page);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+-#else
+-static int yaffs_writepage(struct page *page);
+-#endif
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned flags,
+- struct page **pagep, void **fsdata);
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned copied,
+- struct page *pg, void *fsdadata);
+-#else
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+- unsigned offset, unsigned to);
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+- unsigned to);
+-
+-#endif
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+- int buflen);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#endif
+-
+-static struct address_space_operations yaffs_file_address_operations = {
+- .readpage = yaffs_readpage,
+- .writepage = yaffs_writepage,
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+- .write_begin = yaffs_write_begin,
+- .write_end = yaffs_write_end,
+-#else
+- .prepare_write = yaffs_prepare_write,
+- .commit_write = yaffs_commit_write,
+-#endif
+-};
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+-static const struct file_operations yaffs_file_operations = {
+- .read = do_sync_read,
+- .write = do_sync_write,
+- .aio_read = generic_file_aio_read,
+- .aio_write = generic_file_aio_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+- .splice_read = generic_file_splice_read,
+- .splice_write = generic_file_splice_write,
+- .llseek = generic_file_llseek,
+-};
+-
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-
+-static const struct file_operations yaffs_file_operations = {
+- .read = do_sync_read,
+- .write = do_sync_write,
+- .aio_read = generic_file_aio_read,
+- .aio_write = generic_file_aio_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+- .sendfile = generic_file_sendfile,
+-};
+-
+-#else
+-
+-static const struct file_operations yaffs_file_operations = {
+- .read = generic_file_read,
+- .write = generic_file_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- .sendfile = generic_file_sendfile,
+-#endif
+-};
+-#endif
+-
+-static const struct inode_operations yaffs_file_inode_operations = {
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_symlink_inode_operations = {
+- .readlink = yaffs_readlink,
+- .follow_link = yaffs_follow_link,
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_dir_inode_operations = {
+- .create = yaffs_create,
+- .lookup = yaffs_lookup,
+- .link = yaffs_link,
+- .unlink = yaffs_unlink,
+- .symlink = yaffs_symlink,
+- .mkdir = yaffs_mkdir,
+- .rmdir = yaffs_unlink,
+- .mknod = yaffs_mknod,
+- .rename = yaffs_rename,
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct file_operations yaffs_dir_operations = {
+- .read = generic_read_dir,
+- .readdir = yaffs_readdir,
+- .fsync = yaffs_sync_object,
+-};
+-
+-static const struct super_operations yaffs_super_ops = {
+- .statfs = yaffs_statfs,
+-
+-#ifndef YAFFS_USE_OWN_IGET
+- .read_inode = yaffs_read_inode,
+-#endif
+-#ifdef YAFFS_HAS_PUT_INODE
+- .put_inode = yaffs_put_inode,
+-#endif
+- .put_super = yaffs_put_super,
+- .delete_inode = yaffs_delete_inode,
+- .clear_inode = yaffs_clear_inode,
+- .sync_fs = yaffs_sync_fs,
+- .write_super = yaffs_write_super,
+-};
+-
+-static void yaffs_GrossLock(yaffs_Device *dev)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
+- down(&dev->grossLock);
+- T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
+-}
+-
+-static void yaffs_GrossUnlock(yaffs_Device *dev)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
+- up(&dev->grossLock);
+-}
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+- int buflen)
+-{
+- unsigned char *alias;
+- int ret;
+-
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (!alias)
+- return -ENOMEM;
+-
+- ret = vfs_readlink(dentry, buffer, buflen, alias);
+- kfree(alias);
+- return ret;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#endif
+-{
+- unsigned char *alias;
+- int ret;
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (!alias) {
+- ret = -ENOMEM;
+- goto out;
+- }
+-
+- ret = vfs_follow_link(nd, alias);
+- kfree(alias);
+-out:
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+- return ERR_PTR(ret);
+-#else
+- return ret;
+-#endif
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+- yaffs_Object *obj);
+-
+-/*
+- * Lookup is used to find objects in the fs
+- */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+- struct nameidata *n)
+-#else
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+-#endif
+-{
+- yaffs_Object *obj;
+- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
+-
+- yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_lookup for %d:%s\n",
+- yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
+-
+- obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
+- dentry->d_name.name);
+-
+- obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
+-
+- /* Can't hold gross lock when calling yaffs_get_inode() */
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_lookup found %d\n", obj->objectId));
+-
+- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+-
+- if (inode) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_loookup dentry \n"));
+-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
+- * d_add even if NULL inode */
+-#if 0
+- /*dget(dentry); // try to solve directory bug */
+- d_add(dentry, inode);
+-
+- /* return dentry; */
+- return NULL;
+-#endif
+- }
+-
+- } else {
+- T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
+-
+- }
+-
+-/* added NCB for 2.5/6 compatability - forces add even if inode is
+- * NULL which creates dentry hash */
+- d_add(dentry, inode);
+-
+- return NULL;
+-}
+-
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-
+-/* For now put inode is just for debugging
+- * Put inode is called when the inode **structure** is put.
+- */
+-static void yaffs_put_inode(struct inode *inode)
+-{
+- T(YAFFS_TRACE_OS,
+- ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count)));
+-
+-}
+-#endif
+-
+-/* clear is called to tell the fs to release any per-inode data it holds */
+-static void yaffs_clear_inode(struct inode *inode)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- obj = yaffs_InodeToObject(inode);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count),
+- obj ? "object exists" : "null object"));
+-
+- if (obj) {
+- dev = obj->myDev;
+- yaffs_GrossLock(dev);
+-
+- /* Clear the association between the inode and
+- * the yaffs_Object.
+- */
+- obj->myInode = NULL;
+- yaffs_InodeToObjectLV(inode) = NULL;
+-
+- /* If the object freeing was deferred, then the real
+- * free happens now.
+- * This should fix the inode inconsistency problem.
+- */
+-
+- yaffs_HandleDeferedFree(obj);
+-
+- yaffs_GrossUnlock(dev);
+- }
+-
+-}
+-
+-/* delete is called when the link count is zero and the inode
+- * is put (ie. nobody wants to know about it anymore, time to
+- * delete the file).
+- * NB Must call clear_inode()
+- */
+-static void yaffs_delete_inode(struct inode *inode)
+-{
+- yaffs_Object *obj = yaffs_InodeToObject(inode);
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count),
+- obj ? "object exists" : "null object"));
+-
+- if (obj) {
+- dev = obj->myDev;
+- yaffs_GrossLock(dev);
+- yaffs_DeleteObject(obj);
+- yaffs_GrossUnlock(dev);
+- }
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+- truncate_inode_pages(&inode->i_data, 0);
+-#endif
+- clear_inode(inode);
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id)
+-#else
+-static int yaffs_file_flush(struct file *file)
+-#endif
+-{
+- yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
+-
+- yaffs_Device *dev = obj->myDev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_flush object %d (%s)\n", obj->objectId,
+- obj->dirty ? "dirty" : "clean"));
+-
+- yaffs_GrossLock(dev);
+-
+- yaffs_FlushFile(obj, 1);
+-
+- yaffs_GrossUnlock(dev);
+-
+- return 0;
+-}
+-
+-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+-{
+- /* Lifted from jffs2 */
+-
+- yaffs_Object *obj;
+- unsigned char *pg_buf;
+- int ret;
+-
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
+- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
+- (unsigned)PAGE_CACHE_SIZE));
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- BUG_ON(!PageLocked(pg));
+-#else
+- if (!PageLocked(pg))
+- PAGE_BUG(pg);
+-#endif
+-
+- pg_buf = kmap(pg);
+- /* FIXME: Can kmap fail? */
+-
+- yaffs_GrossLock(dev);
+-
+- ret = yaffs_ReadDataFromFile(obj, pg_buf,
+- pg->index << PAGE_CACHE_SHIFT,
+- PAGE_CACHE_SIZE);
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (ret >= 0)
+- ret = 0;
+-
+- if (ret) {
+- ClearPageUptodate(pg);
+- SetPageError(pg);
+- } else {
+- SetPageUptodate(pg);
+- ClearPageError(pg);
+- }
+-
+- flush_dcache_page(pg);
+- kunmap(pg);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
+- return ret;
+-}
+-
+-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+-{
+- int ret = yaffs_readpage_nolock(f, pg);
+- UnlockPage(pg);
+- return ret;
+-}
+-
+-static int yaffs_readpage(struct file *f, struct page *pg)
+-{
+- return yaffs_readpage_unlock(f, pg);
+-}
+-
+-/* writepage inspired by/stolen from smbfs */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+-#else
+-static int yaffs_writepage(struct page *page)
+-#endif
+-{
+- struct address_space *mapping = page->mapping;
+- loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
+- struct inode *inode;
+- unsigned long end_index;
+- char *buffer;
+- yaffs_Object *obj;
+- int nWritten = 0;
+- unsigned nBytes;
+-
+- if (!mapping)
+- BUG();
+- inode = mapping->host;
+- if (!inode)
+- BUG();
+-
+- if (offset > inode->i_size) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_writepage at %08x, inode size = %08x!!!\n",
+- (unsigned)(page->index << PAGE_CACHE_SHIFT),
+- (unsigned)inode->i_size));
+- T(YAFFS_TRACE_OS,
+- (" -> don't care!!\n"));
+- unlock_page(page);
+- return 0;
+- }
+-
+- end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+-
+- /* easy case */
+- if (page->index < end_index)
+- nBytes = PAGE_CACHE_SIZE;
+- else
+- nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
+-
+- get_page(page);
+-
+- buffer = kmap(page);
+-
+- obj = yaffs_InodeToObject(inode);
+- yaffs_GrossLock(obj->myDev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_writepage at %08x, size %08x\n",
+- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+- T(YAFFS_TRACE_OS,
+- ("writepag0: obj = %05x, ino = %05x\n",
+- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+- nWritten = yaffs_WriteDataToFile(obj, buffer,
+- page->index << PAGE_CACHE_SHIFT, nBytes, 0);
+-
+- T(YAFFS_TRACE_OS,
+- ("writepag1: obj = %05x, ino = %05x\n",
+- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+- yaffs_GrossUnlock(obj->myDev);
+-
+- kunmap(page);
+- SetPageUptodate(page);
+- UnlockPage(page);
+- put_page(page);
+-
+- return (nWritten == nBytes) ? 0 : -ENOSPC;
+-}
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned flags,
+- struct page **pagep, void **fsdata)
+-{
+- struct page *pg = NULL;
+- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+- uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
+- uint32_t to = offset + len;
+-
+- int ret = 0;
+- int space_held = 0;
+-
+- T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
+- /* Get a page */
+-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
+- pg = grab_cache_page_write_begin(mapping, index, flags);
+-#else
+- pg = __grab_cache_page(mapping, index);
+-#endif
+-
+- *pagep = pg;
+- if (!pg) {
+- ret = -ENOMEM;
+- goto out;
+- }
+- /* Get fs space */
+- space_held = yaffs_hold_space(filp);
+-
+- if (!space_held) {
+- ret = -ENOSPC;
+- goto out;
+- }
+-
+- /* Update page if required */
+-
+- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+- ret = yaffs_readpage_nolock(filp, pg);
+-
+- if (ret)
+- goto out;
+-
+- /* Happy path return */
+- T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
+-
+- return 0;
+-
+-out:
+- T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
+- if (space_held)
+- yaffs_release_space(filp);
+- if (pg) {
+- unlock_page(pg);
+- page_cache_release(pg);
+- }
+- return ret;
+-}
+-
+-#else
+-
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+- unsigned offset, unsigned to)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
+-
+- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+- return yaffs_readpage_nolock(f, pg);
+- return 0;
+-}
+-#endif
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned copied,
+- struct page *pg, void *fsdadata)
+-{
+- int ret = 0;
+- void *addr, *kva;
+- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+-
+- kva = kmap(pg);
+- addr = kva + offset_into_page;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_write_end addr %x pos %x nBytes %d\n",
+- (unsigned) addr,
+- (int)pos, copied));
+-
+- ret = yaffs_file_write(filp, addr, copied, &pos);
+-
+- if (ret != copied) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_write_end not same size ret %d copied %d\n",
+- ret, copied));
+- SetPageError(pg);
+- ClearPageUptodate(pg);
+- } else {
+- SetPageUptodate(pg);
+- }
+-
+- kunmap(pg);
+-
+- yaffs_release_space(filp);
+- unlock_page(pg);
+- page_cache_release(pg);
+- return ret;
+-}
+-#else
+-
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+- unsigned to)
+-{
+- void *addr, *kva;
+-
+- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+- int nBytes = to - offset;
+- int nWritten;
+-
+- unsigned spos = pos;
+- unsigned saddr;
+-
+- kva = kmap(pg);
+- addr = kva + offset;
+-
+- saddr = (unsigned) addr;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write addr %x pos %x nBytes %d\n",
+- saddr, spos, nBytes));
+-
+- nWritten = yaffs_file_write(f, addr, nBytes, &pos);
+-
+- if (nWritten != nBytes) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
+- nWritten, nBytes));
+- SetPageError(pg);
+- ClearPageUptodate(pg);
+- } else {
+- SetPageUptodate(pg);
+- }
+-
+- kunmap(pg);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write returning %d\n",
+- nWritten == nBytes ? 0 : nWritten));
+-
+- return nWritten == nBytes ? 0 : nWritten;
+-}
+-#endif
+-
+-
+-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
+-{
+- if (inode && obj) {
+-
+-
+- /* Check mode against the variant type and attempt to repair if broken. */
+- __u32 mode = obj->yst_mode;
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- if (!S_ISREG(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFREG;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- if (!S_ISLNK(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFLNK;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- if (!S_ISDIR(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFDIR;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- default:
+- /* TODO? */
+- break;
+- }
+-
+- inode->i_flags |= S_NOATIME;
+-
+- inode->i_ino = obj->objectId;
+- inode->i_mode = obj->yst_mode;
+- inode->i_uid = obj->yst_uid;
+- inode->i_gid = obj->yst_gid;
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+- inode->i_blksize = inode->i_sb->s_blocksize;
+-#endif
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+- inode->i_rdev = old_decode_dev(obj->yst_rdev);
+- inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+- inode->i_atime.tv_nsec = 0;
+- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+- inode->i_mtime.tv_nsec = 0;
+- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+- inode->i_ctime.tv_nsec = 0;
+-#else
+- inode->i_rdev = obj->yst_rdev;
+- inode->i_atime = obj->yst_atime;
+- inode->i_mtime = obj->yst_mtime;
+- inode->i_ctime = obj->yst_ctime;
+-#endif
+- inode->i_size = yaffs_GetObjectFileLength(obj);
+- inode->i_blocks = (inode->i_size + 511) >> 9;
+-
+- inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
+- inode->i_mode, inode->i_uid, inode->i_gid,
+- (int)inode->i_size, atomic_read(&inode->i_count)));
+-
+- switch (obj->yst_mode & S_IFMT) {
+- default: /* fifo, device or socket */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- init_special_inode(inode, obj->yst_mode,
+- old_decode_dev(obj->yst_rdev));
+-#else
+- init_special_inode(inode, obj->yst_mode,
+- (dev_t) (obj->yst_rdev));
+-#endif
+- break;
+- case S_IFREG: /* file */
+- inode->i_op = &yaffs_file_inode_operations;
+- inode->i_fop = &yaffs_file_operations;
+- inode->i_mapping->a_ops =
+- &yaffs_file_address_operations;
+- break;
+- case S_IFDIR: /* directory */
+- inode->i_op = &yaffs_dir_inode_operations;
+- inode->i_fop = &yaffs_dir_operations;
+- break;
+- case S_IFLNK: /* symlink */
+- inode->i_op = &yaffs_symlink_inode_operations;
+- break;
+- }
+-
+- yaffs_InodeToObjectLV(inode) = obj;
+-
+- obj->myInode = inode;
+-
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_FileInode invalid parameters\n"));
+- }
+-
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+- yaffs_Object *obj)
+-{
+- struct inode *inode;
+-
+- if (!sb) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for NULL super_block!!\n"));
+- return NULL;
+-
+- }
+-
+- if (!obj) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for NULL object!!\n"));
+- return NULL;
+-
+- }
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for object %d\n", obj->objectId));
+-
+- inode = Y_IGET(sb, obj->objectId);
+- if (IS_ERR(inode))
+- return NULL;
+-
+- /* NB Side effect: iget calls back to yaffs_read_inode(). */
+- /* iget also increments the inode's i_count */
+- /* NB You can't be holding grossLock or deadlock will happen! */
+-
+- return inode;
+-}
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+- loff_t *pos)
+-{
+- yaffs_Object *obj;
+- int nWritten, ipos;
+- struct inode *inode;
+- yaffs_Device *dev;
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- inode = f->f_dentry->d_inode;
+-
+- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+- ipos = inode->i_size;
+- else
+- ipos = *pos;
+-
+- if (!obj)
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write: hey obj is null!\n"));
+- else
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write about to write writing %zu bytes"
+- "to object %d at %d\n",
+- n, obj->objectId, ipos));
+-
+- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write writing %zu bytes, %d written at %d\n",
+- n, nWritten, ipos));
+-
+- if (nWritten > 0) {
+- ipos += nWritten;
+- *pos = ipos;
+- if (ipos > inode->i_size) {
+- inode->i_size = ipos;
+- inode->i_blocks = (ipos + 511) >> 9;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write size updated to %d bytes, "
+- "%d blocks\n",
+- ipos, (int)(inode->i_blocks)));
+- }
+-
+- }
+- yaffs_GrossUnlock(dev);
+- return nWritten == 0 ? -ENOSPC : nWritten;
+-}
+-
+-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+-/* For now we just assume few parallel writes and check against a small number. */
+-/* Todo: need to do this with a counter to handle parallel reads better */
+-
+-static ssize_t yaffs_hold_space(struct file *f)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- int nFreeChunks;
+-
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+-
+- yaffs_GrossUnlock(dev);
+-
+- return (nFreeChunks > 20) ? 1 : 0;
+-}
+-
+-static void yaffs_release_space(struct file *f)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+-
+- yaffs_GrossUnlock(dev);
+-}
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+- struct inode *inode = f->f_dentry->d_inode;
+- unsigned long offset, curoffs;
+- struct ylist_head *i;
+- yaffs_Object *l;
+-
+- char name[YAFFS_MAX_NAME_LENGTH + 1];
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- offset = f->f_pos;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
+-
+- if (offset == 0) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: entry . ino %d \n",
+- (int)inode->i_ino));
+- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
+- goto out;
+- offset++;
+- f->f_pos++;
+- }
+- if (offset == 1) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: entry .. ino %d \n",
+- (int)f->f_dentry->d_parent->d_inode->i_ino));
+- if (filldir(dirent, "..", 2, offset,
+- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
+- goto out;
+- offset++;
+- f->f_pos++;
+- }
+-
+- curoffs = 1;
+-
+- /* If the directory has changed since the open or last call to
+- readdir, rewind to after the 2 canned entries. */
+-
+- if (f->f_version != inode->i_version) {
+- offset = 2;
+- f->f_pos = offset;
+- f->f_version = inode->i_version;
+- }
+-
+- ylist_for_each(i, &obj->variant.directoryVariant.children) {
+- curoffs++;
+- if (curoffs >= offset) {
+- l = ylist_entry(i, yaffs_Object, siblings);
+-
+- yaffs_GetObjectName(l, name,
+- YAFFS_MAX_NAME_LENGTH + 1);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: %s inode %d\n", name,
+- yaffs_GetObjectInode(l)));
+-
+- if (filldir(dirent,
+- name,
+- strlen(name),
+- offset,
+- yaffs_GetObjectInode(l),
+- yaffs_GetObjectType(l)) < 0)
+- goto up_and_out;
+-
+- offset++;
+- f->f_pos++;
+- }
+- }
+-
+-up_and_out:
+-out:
+- yaffs_GrossUnlock(dev);
+-
+- return 0;
+-}
+-
+-/*
+- * File creation. Allocate an inode, and we're done..
+- */
+-
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+-#define YCRED(x) x
+-#else
+-#define YCRED(x) (x->cred)
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- dev_t rdev)
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- int rdev)
+-#endif
+-{
+- struct inode *inode;
+-
+- yaffs_Object *obj = NULL;
+- yaffs_Device *dev;
+-
+- yaffs_Object *parent = yaffs_InodeToObject(dir);
+-
+- int error = -ENOSPC;
+- uid_t uid = YCRED(current)->fsuid;
+- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+- mode |= S_ISGID;
+-
+- if (parent) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: parent object %d type %d\n",
+- parent->objectId, parent->variantType));
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: could not get parent object\n"));
+- return -EPERM;
+- }
+-
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
+- "mode %x dev %x\n",
+- dentry->d_name.name, mode, rdev));
+-
+- dev = parent->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- switch (mode & S_IFMT) {
+- default:
+- /* Special (socket, fifo, device...) */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+- gid, old_encode_dev(rdev));
+-#else
+- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+- gid, rdev);
+-#endif
+- break;
+- case S_IFREG: /* file */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
+- obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
+- gid);
+- break;
+- case S_IFDIR: /* directory */
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: making directory\n"));
+- obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
+- uid, gid);
+- break;
+- case S_IFLNK: /* symlink */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
+- obj = NULL; /* Do we ever get here? */
+- break;
+- }
+-
+- /* Can not call yaffs_get_inode() with gross lock held */
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+- d_instantiate(dentry, inode);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod created object %d count = %d\n",
+- obj->objectId, atomic_read(&inode->i_count)));
+- error = 0;
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod failed making object\n"));
+- error = -ENOMEM;
+- }
+-
+- return error;
+-}
+-
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+-{
+- int retVal;
+- T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
+- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+- return retVal;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+- struct nameidata *n)
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+-#endif
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_create\n"));
+- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+-}
+-
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+-{
+- int retVal;
+-
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
+- dentry->d_name.name));
+-
+- dev = yaffs_InodeToObject(dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
+-
+- if (retVal == YAFFS_OK) {
+- dentry->d_inode->i_nlink--;
+- dir->i_version++;
+- yaffs_GrossUnlock(dev);
+- mark_inode_dirty(dentry->d_inode);
+- return 0;
+- }
+- yaffs_GrossUnlock(dev);
+- return -ENOTEMPTY;
+-}
+-
+-/*
+- * Create a link...
+- */
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+- struct dentry *dentry)
+-{
+- struct inode *inode = old_dentry->d_inode;
+- yaffs_Object *obj = NULL;
+- yaffs_Object *link = NULL;
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_link\n"));
+-
+- obj = yaffs_InodeToObject(inode);
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
+- link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
+- obj);
+-
+- if (link) {
+- old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+- d_instantiate(dentry, old_dentry->d_inode);
+- atomic_inc(&old_dentry->d_inode->i_count);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_link link count %d i_count %d\n",
+- old_dentry->d_inode->i_nlink,
+- atomic_read(&old_dentry->d_inode->i_count)));
+- }
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (link)
+- return 0;
+-
+- return -EPERM;
+-}
+-
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+- const char *symname)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+- uid_t uid = YCRED(current)->fsuid;
+- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
+-
+- dev = yaffs_InodeToObject(dir)->myDev;
+- yaffs_GrossLock(dev);
+- obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
+- S_IFLNK | S_IRWXUGO, uid, gid, symname);
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- struct inode *inode;
+-
+- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+- d_instantiate(dentry, inode);
+- T(YAFFS_TRACE_OS, ("symlink created OK\n"));
+- return 0;
+- } else {
+- T(YAFFS_TRACE_OS, ("symlink not created\n"));
+- }
+-
+- return -ENOMEM;
+-}
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+- int datasync)
+-{
+-
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- obj = yaffs_DentryToObject(dentry);
+-
+- dev = obj->myDev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
+- yaffs_GrossLock(dev);
+- yaffs_FlushFile(obj, 1);
+- yaffs_GrossUnlock(dev);
+- return 0;
+-}
+-
+-/*
+- * The VFS layer already does all the dentry stuff for rename.
+- *
+- * NB: POSIX says you can rename an object over an old object of the same name
+- */
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
+-{
+- yaffs_Device *dev;
+- int retVal = YAFFS_FAIL;
+- yaffs_Object *target;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
+- dev = yaffs_InodeToObject(old_dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- /* Check if the target is an existing directory that is not empty. */
+- target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
+- new_dentry->d_name.name);
+-
+-
+-
+- if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+- !ylist_empty(&target->variant.directoryVariant.children)) {
+-
+- T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
+-
+- retVal = YAFFS_FAIL;
+- } else {
+- /* Now does unlinking internally using shadowing mechanism */
+- T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
+-
+- retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
+- old_dentry->d_name.name,
+- yaffs_InodeToObject(new_dir),
+- new_dentry->d_name.name);
+- }
+- yaffs_GrossUnlock(dev);
+-
+- if (retVal == YAFFS_OK) {
+- if (target) {
+- new_dentry->d_inode->i_nlink--;
+- mark_inode_dirty(new_dentry->d_inode);
+- }
+-
+- return 0;
+- } else {
+- return -ENOTEMPTY;
+- }
+-}
+-
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+-{
+- struct inode *inode = dentry->d_inode;
+- int error;
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_setattr of object %d\n",
+- yaffs_InodeToObject(inode)->objectId));
+-
+- error = inode_change_ok(inode, attr);
+- if (error == 0) {
+- dev = yaffs_InodeToObject(inode)->myDev;
+- yaffs_GrossLock(dev);
+- if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
+- YAFFS_OK) {
+- error = 0;
+- } else {
+- error = -EPERM;
+- }
+- yaffs_GrossUnlock(dev);
+- if (!error)
+- error = inode_setattr(inode, attr);
+- }
+- return error;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
+-{
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+- struct super_block *sb = dentry->d_sb;
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#endif
+-
+- T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
+-
+- yaffs_GrossLock(dev);
+-
+- buf->f_type = YAFFS_MAGIC;
+- buf->f_bsize = sb->s_blocksize;
+- buf->f_namelen = 255;
+-
+- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
+- /* Do this if chunk size is not a power of 2 */
+-
+- uint64_t bytesInDev;
+- uint64_t bytesFree;
+-
+- bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
+- ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
+-
+- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+- buf->f_blocks = bytesInDev;
+-
+- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+- ((uint64_t)(dev->nDataBytesPerChunk));
+-
+- do_div(bytesFree, sb->s_blocksize);
+-
+- buf->f_bfree = bytesFree;
+-
+- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+-
+- buf->f_blocks =
+- (dev->endBlock - dev->startBlock + 1) *
+- dev->nChunksPerBlock /
+- (sb->s_blocksize / dev->nDataBytesPerChunk);
+- buf->f_bfree =
+- yaffs_GetNumberOfFreeChunks(dev) /
+- (sb->s_blocksize / dev->nDataBytesPerChunk);
+- } else {
+- buf->f_blocks =
+- (dev->endBlock - dev->startBlock + 1) *
+- dev->nChunksPerBlock *
+- (dev->nDataBytesPerChunk / sb->s_blocksize);
+-
+- buf->f_bfree =
+- yaffs_GetNumberOfFreeChunks(dev) *
+- (dev->nDataBytesPerChunk / sb->s_blocksize);
+- }
+-
+- buf->f_files = 0;
+- buf->f_ffree = 0;
+- buf->f_bavail = buf->f_bfree;
+-
+- yaffs_GrossUnlock(dev);
+- return 0;
+-}
+-
+-
+-static int yaffs_do_sync_fs(struct super_block *sb)
+-{
+-
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+- T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
+-
+- if (sb->s_dirt) {
+- yaffs_GrossLock(dev);
+-
+- if (dev) {
+- yaffs_FlushEntireDeviceCache(dev);
+- yaffs_CheckpointSave(dev);
+- }
+-
+- yaffs_GrossUnlock(dev);
+-
+- sb->s_dirt = 0;
+- }
+- return 0;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static void yaffs_write_super(struct super_block *sb)
+-#else
+-static int yaffs_write_super(struct super_block *sb)
+-#endif
+-{
+-
+- T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
+- if (yaffs_auto_checkpoint >= 2)
+- yaffs_do_sync_fs(sb);
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+- return 0;
+-#endif
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait)
+-#else
+-static int yaffs_sync_fs(struct super_block *sb)
+-#endif
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
+-
+- if (yaffs_auto_checkpoint >= 1)
+- yaffs_do_sync_fs(sb);
+-
+- return 0;
+-}
+-
+-#ifdef YAFFS_USE_OWN_IGET
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+-{
+- struct inode *inode;
+- yaffs_Object *obj;
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_iget for %lu\n", ino));
+-
+- inode = iget_locked(sb, ino);
+- if (!inode)
+- return ERR_PTR(-ENOMEM);
+- if (!(inode->i_state & I_NEW))
+- return inode;
+-
+- /* NB This is called as a side effect of other functions, but
+- * we had to release the lock to prevent deadlocks, so
+- * need to lock again.
+- */
+-
+- yaffs_GrossLock(dev);
+-
+- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+- yaffs_FillInodeFromObject(inode, obj);
+-
+- yaffs_GrossUnlock(dev);
+-
+- unlock_new_inode(inode);
+- return inode;
+-}
+-
+-#else
+-
+-static void yaffs_read_inode(struct inode *inode)
+-{
+- /* NB This is called as a side effect of other functions, but
+- * we had to release the lock to prevent deadlocks, so
+- * need to lock again.
+- */
+-
+- yaffs_Object *obj;
+- yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_inode for %d\n", (int)inode->i_ino));
+-
+- yaffs_GrossLock(dev);
+-
+- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+- yaffs_FillInodeFromObject(inode, obj);
+-
+- yaffs_GrossUnlock(dev);
+-}
+-
+-#endif
+-
+-static YLIST_HEAD(yaffs_dev_list);
+-
+-#if 0 /* not used */
+-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,
+- ("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,
+- ("yaffs_remount_fs: %s: RW\n", dev->name));
+- }
+-
+- return 0;
+-}
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
+-
+- yaffs_GrossLock(dev);
+-
+- yaffs_FlushEntireDeviceCache(dev);
+-
+- yaffs_CheckpointSave(dev);
+-
+- if (dev->putSuperFunc)
+- dev->putSuperFunc(sb);
+-
+- yaffs_Deinitialise(dev);
+-
+- yaffs_GrossUnlock(dev);
+-
+- /* we assume this is protected by lock_kernel() in mount/umount */
+- ylist_del(&dev->devList);
+-
+- if (dev->spareBuffer) {
+- YFREE(dev->spareBuffer);
+- dev->spareBuffer = NULL;
+- }
+-
+- kfree(dev);
+-}
+-
+-
+-static void yaffs_MTDPutSuper(struct super_block *sb)
+-{
+- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+-
+- if (mtd->sync)
+- mtd->sync(mtd);
+-
+- put_mtd_device(mtd);
+-}
+-
+-
+-static void yaffs_MarkSuperBlockDirty(void *vsb)
+-{
+- struct super_block *sb = (struct super_block *)vsb;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
+- if (sb)
+- 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)
+-{
+- int nBlocks;
+- struct inode *inode = NULL;
+- struct dentry *root;
+- yaffs_Device *dev = 0;
+- 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;
+- sb->s_flags |= MS_NOATIME;
+-
+- if (!sb)
+- printk(KERN_INFO "yaffs: sb is NULL\n");
+- else if (!sb->s_dev)
+- printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
+- else if (!yaffs_devname(sb, devname_buf))
+- printk(KERN_INFO "yaffs: devname is NULL\n");
+- else
+- 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, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
+- T(YAFFS_TRACE_OS,
+- ("yaffs: Write verification disabled. All guarantees "
+- "null and void\n"));
+-#endif
+-
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
+- "\"%s\"\n",
+- MAJOR(sb->s_dev), MINOR(sb->s_dev),
+- yaffs_devname(sb, devname_buf)));
+-
+- /* Check it's an mtd device..... */
+- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+- return NULL; /* This isn't an mtd device */
+-
+- /* Get the device */
+- mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+- if (!mtd) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device #%u doesn't appear to exist\n",
+- MINOR(sb->s_dev)));
+- return NULL;
+- }
+- /* Check it's NAND */
+- if (mtd->type != MTD_NANDFLASH) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+- return NULL;
+- }
+-
+- T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
+- T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
+- T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
+- T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
+- 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));
+- 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));
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+- T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
+-#else
+- T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
+-#endif
+-
+-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
+-
+- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
+- yaffsVersion = 2;
+- }
+-
+- /* Added NCB 26/5/2006 for completeness */
+- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
+- yaffsVersion = 1;
+- }
+-
+-#endif
+-
+- if (yaffsVersion == 2) {
+- /* Check for version 2 style functions */
+- if (!mtd->erase ||
+- !mtd->block_isbad ||
+- !mtd->block_markbad ||
+- !mtd->read ||
+- !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- !mtd->read_oob || !mtd->write_oob) {
+-#else
+- !mtd->write_ecc ||
+- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not support required "
+- "functions\n"));;
+- return NULL;
+- }
+-
+- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+- !options.inband_tags) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not have the "
+- "right page sizes\n"));
+- return NULL;
+- }
+- } else {
+- /* Check for V1 style functions */
+- if (!mtd->erase ||
+- !mtd->read ||
+- !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- !mtd->read_oob || !mtd->write_oob) {
+-#else
+- !mtd->write_ecc ||
+- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not support required "
+- "functions\n"));;
+- return NULL;
+- }
+-
+- 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 "
+- "right page sizes\n"));
+- return NULL;
+- }
+- }
+-
+- /* OK, so if we got here, we have an MTD that's NAND and looks
+- * like it has the right capabilities
+- * Set the yaffs_Device up for mtd
+- */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#else
+- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#endif
+- if (!dev) {
+- /* Deep shit could not allocate device structure */
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs_read_super: Failed trying to allocate "
+- "yaffs_Device. \n"));
+- return NULL;
+- }
+-
+- memset(dev, 0, sizeof(yaffs_Device));
+- dev->genericDevice = mtd;
+- dev->name = mtd->name;
+-
+- /* Set up the memory size parameters.... */
+-
+- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+-
+- dev->startBlock = 0;
+- dev->endBlock = nBlocks - 1;
+- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+- dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+- dev->nReservedBlocks = 5;
+- dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+- dev->inbandTags = options.inband_tags;
+-
+- /* ... and the functions. */
+- if (yaffsVersion == 2) {
+- dev->writeChunkWithTagsToNAND =
+- nandmtd2_WriteChunkWithTagsToNAND;
+- dev->readChunkWithTagsFromNAND =
+- nandmtd2_ReadChunkWithTagsFromNAND;
+- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+- dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
+- dev->spareBuffer = YMALLOC(mtd->oobsize);
+- dev->isYaffs2 = 1;
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- dev->totalBytesPerChunk = mtd->writesize;
+- dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
+-#else
+- dev->totalBytesPerChunk = mtd->oobblock;
+- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+-#endif
+- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
+-
+- 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->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+- dev->initialiseNAND = nandmtd_InitialiseNAND;
+-
+- dev->putSuperFunc = yaffs_MTDPutSuper;
+-
+- dev->superBlock = (void *)sb;
+- dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
+-
+-
+-#ifndef CONFIG_YAFFS_DOES_ECC
+- dev->useNANDECC = 1;
+-#endif
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
+- 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 */
+- ylist_add_tail(&dev->devList, &yaffs_dev_list);
+-
+- init_MUTEX(&dev->grossLock);
+-
+- yaffs_GrossLock(dev);
+-
+- err = yaffs_GutsInitialise(dev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_super: guts initialised %s\n",
+- (err == YAFFS_OK) ? "OK" : "FAILED"));
+-
+- /* Release lock before yaffs_get_inode() */
+- yaffs_GrossUnlock(dev);
+-
+- /* Create root inode */
+- if (err == YAFFS_OK)
+- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
+- yaffs_Root(dev));
+-
+- if (!inode)
+- return NULL;
+-
+- inode->i_op = &yaffs_dir_inode_operations;
+- inode->i_fop = &yaffs_dir_operations;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
+-
+- root = d_alloc_root(inode);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
+-
+- if (!root) {
+- iput(inode);
+- return NULL;
+- }
+- sb->s_root = root;
+- sb->s_dirt = !dev->isCheckpointed;
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
+- return sb;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data, struct vfsmount *mnt)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs_fs_type = {
+- .owner = THIS_MODULE,
+- .name = "yaffs",
+- .get_sb = yaffs_read_super,
+- .kill_sb = kill_block_super,
+- .fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(1, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+- FS_REQUIRES_DEV);
+-#endif
+-
+-
+-#ifdef CONFIG_YAFFS_YAFFS2
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs2_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name, void *data,
+- struct vfsmount *mnt)
+-{
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs2_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs2_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs2_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs2_fs_type = {
+- .owner = THIS_MODULE,
+- .name = "yaffs2",
+- .get_sb = yaffs2_read_super,
+- .kill_sb = kill_block_super,
+- .fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs2_read_super(struct super_block *sb,
+- void *data, int silent)
+-{
+- return yaffs_internal_read_super(2, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+- FS_REQUIRES_DEV);
+-#endif
+-
+-#endif /* CONFIG_YAFFS_YAFFS2 */
+-
+-static struct proc_dir_entry *my_proc_entry;
+-
+-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
+-{
+- buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
+- buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
+- 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, "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);
+- buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
+- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
+- buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
+- buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
+- buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
+- buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
+- buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
+- buf += 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);
+- buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
+- buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
+- buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
+- buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
+- buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
+- buf +=
+- sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
+- buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
+- buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
+- buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
+-
+- return buf;
+-}
+-
+-static int yaffs_proc_read(char *page,
+- char **start,
+- off_t offset, int count, int *eof, void *data)
+-{
+- struct ylist_head *item;
+- char *buf = page;
+- int step = offset;
+- int n = 0;
+-
+- /* Get proc_file_read() to step 'offset' by one on each sucessive call.
+- * We use 'offset' (*ppos) to indicate where we are in devList.
+- * This also assumes the user has posted a read buffer large
+- * enough to hold the complete output; but that's life in /proc.
+- */
+-
+- *(int *)start = 1;
+-
+- /* Print header first */
+- if (step == 0) {
+- buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
+- "\n%s\n%s\n", yaffs_fs_c_version,
+- yaffs_guts_c_version);
+- }
+-
+- /* hold lock_kernel while traversing yaffs_dev_list */
+- lock_kernel();
+-
+- /* Locate and print the Nth entry. Order N-squared but N is small. */
+- ylist_for_each(item, &yaffs_dev_list) {
+- yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
+- if (n < step) {
+- n++;
+- continue;
+- }
+- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
+- buf = yaffs_dump_dev(buf, dev);
+- break;
+- }
+- unlock_kernel();
+-
+- return buf - page < count ? buf - page : count;
+-}
+-
+-/**
+- * 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 {
+- char *mask_name;
+- unsigned mask_bitfield;
+-} mask_flags[] = {
+- {"allocate", YAFFS_TRACE_ALLOCATE},
+- {"always", YAFFS_TRACE_ALWAYS},
+- {"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},
+- {"gc_detail", YAFFS_TRACE_GC_DETAIL},
+- {"gc", YAFFS_TRACE_GC},
+- {"mtd", YAFFS_TRACE_MTD},
+- {"nandaccess", YAFFS_TRACE_NANDACCESS},
+- {"os", YAFFS_TRACE_OS},
+- {"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;
+- char *mask_name;
+- const char *x;
+- char substring[MAX_MASK_NAME_LENGTH + 1];
+- int i;
+- int done = 0;
+- int add, len = 0;
+- int pos = 0;
+-
+- rg = yaffs_traceMask;
+-
+- while (!done && (pos < count)) {
+- done = 1;
+- while ((pos < count) && isspace(buf[pos]))
+- pos++;
+-
+- switch (buf[pos]) {
+- case '+':
+- case '-':
+- case '=':
+- add = buf[pos];
+- pos++;
+- break;
+-
+- default:
+- add = ' ';
+- break;
+- }
+- mask_name = NULL;
+-
+- mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+-
+- if (end > buf + pos) {
+- mask_name = "numeral";
+- len = end - (buf + pos);
+- pos += len;
+- 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++) {
+- 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;
+- break;
+- }
+- }
+- }
+-
+- if (mask_name != NULL) {
+- done = 0;
+- switch (add) {
+- case '-':
+- rg &= ~mask_bitfield;
+- break;
+- case '+':
+- rg |= mask_bitfield;
+- break;
+- case '=':
+- rg = mask_bitfield;
+- break;
+- default:
+- rg |= mask_bitfield;
+- break;
+- }
+- }
+- }
+-
+- yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
+-
+- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
+-
+- if (rg & YAFFS_TRACE_ALWAYS) {
+- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+- char flag;
+- flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
+- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
+- }
+- }
+-
+- return count;
+-}
+-
+-/* Stuff to handle installation of file systems */
+-struct file_system_to_install {
+- struct file_system_type *fst;
+- int installed;
+-};
+-
+-static struct file_system_to_install fs_to_install[] = {
+- {&yaffs_fs_type, 0},
+- {&yaffs2_fs_type, 0},
+- {NULL, 0}
+-};
+-
+-static int __init init_yaffs_fs(void)
+-{
+- int error = 0;
+- struct file_system_to_install *fsinst;
+-
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
+-
+- /* Install the proc_fs entry */
+- my_proc_entry = create_proc_entry("yaffs",
+- S_IRUGO | S_IFREG,
+- YPROC_ROOT);
+-
+- if (my_proc_entry) {
+- my_proc_entry->write_proc = yaffs_proc_write;
+- my_proc_entry->read_proc = yaffs_proc_read;
+- my_proc_entry->data = NULL;
+- } else
+- return -ENOMEM;
+-
+- /* Now add the file system entries */
+-
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst && !error) {
+- error = register_filesystem(fsinst->fst);
+- if (!error)
+- fsinst->installed = 1;
+- fsinst++;
+- }
+-
+- /* Any errors? uninstall */
+- if (error) {
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst) {
+- if (fsinst->installed) {
+- unregister_filesystem(fsinst->fst);
+- fsinst->installed = 0;
+- }
+- fsinst++;
+- }
+- }
+-
+- return error;
+-}
+-
+-static void __exit exit_yaffs_fs(void)
+-{
+-
+- struct file_system_to_install *fsinst;
+-
+- T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
+- " removing. \n"));
+-
+- remove_proc_entry("yaffs", YPROC_ROOT);
+-
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst) {
+- if (fsinst->installed) {
+- unregister_filesystem(fsinst->fst);
+- fsinst->installed = 0;
+- }
+- fsinst++;
+- }
+-}
+-
+-module_init(init_yaffs_fs)
+-module_exit(exit_yaffs_fs)
+-
+-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
+-MODULE_LICENSE("GPL");
+diff -Nrup a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h
+--- a/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 17:48:22.710000363 +0300
++++ b/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 18:03:47.542000362 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,6 +17,7 @@
+ #define __YAFFS_GETBLOCKINFO_H__
+
+ #include "yaffs_guts.h"
++#include "yaffs_trace.h"
+
+ /* Function to manipulate block info */
+ static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
+diff -Nrup a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c
+--- a/fs/yaffs2/yaffs_guts.c 2010-10-03 17:48:22.715000364 +0300
++++ b/fs/yaffs2/yaffs_guts.c 2010-10-03 18:03:47.518000364 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -10,11 +10,8 @@
+ * 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 1.82 2009-03-09 04:24:17 charles Exp $";
+-
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+
+ #include "yaffsinterface.h"
+ #include "yaffs_guts.h"
+@@ -22,22 +19,28 @@ const char *yaffs_guts_c_version =
+ #include "yaffs_getblockinfo.h"
+
+ #include "yaffs_tagscompat.h"
+-#ifndef CONFIG_YAFFS_USE_OWN_SORT
+-#include "yaffs_qsort.h"
+-#endif
++
+ #include "yaffs_nand.h"
+
+-#include "yaffs_checkptrw.h"
++#include "yaffs_yaffs1.h"
++#include "yaffs_yaffs2.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_verify.h"
+
+ #include "yaffs_nand.h"
+ #include "yaffs_packedtags2.h"
+
++#include "yaffs_nameval.h"
++#include "yaffs_allocator.h"
+
+-#define YAFFS_PASSIVE_GC_CHUNKS 2
++/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
++#define YAFFS_GC_GOOD_ENOUGH 2
++#define YAFFS_GC_PASSIVE_THRESHOLD 4
+
+ #include "yaffs_ecc.h"
+
+
++
+ /* Robustification (if it ever comes about...) */
+ static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
+ static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+@@ -49,33 +52,26 @@ static void yaffs_HandleUpdateChunk(yaff
+ const yaffs_ExtendedTags *tags);
+
+ /* Other local prototypes */
++static void yaffs_UpdateParent(yaffs_Object *obj);
+ static int yaffs_UnlinkObject(yaffs_Object *obj);
+ static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+
+-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+-
+ static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
+ const __u8 *buffer,
+ yaffs_ExtendedTags *tags,
+ int useReserve);
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+- int chunkInNAND, int inScan);
++
+
+ static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+ yaffs_ObjectType type);
+-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+- yaffs_Object *obj);
+-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+- int force, int isShrink, int shadows);
++
++
++static int yaffs_ApplyXMod(yaffs_Object *obj, char *buffer, yaffs_XAttrMod *xmod);
++
+ static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
+ static int yaffs_CheckStructures(void);
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+- int chunkOffset, int *limit);
+ static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+
+-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
+-
+-
+ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND);
+
+@@ -87,30 +83,22 @@ static int yaffs_TagsMatch(const yaffs_E
+ static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+ yaffs_BlockInfo **blockUsedPtr);
+
+-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
+-
+ static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
+
+-static void yaffs_VerifyDirectory(yaffs_Object *directory);
+-#ifdef YAFFS_PARANOID
+-static int yaffs_CheckFileSanity(yaffs_Object *in);
+-#else
+-#define yaffs_CheckFileSanity(in)
+-#endif
+-
+ static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
+ static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
+
+-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);
++static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags);
++
++
++static void yaffs_LoadNameFromObjectHeader(yaffs_Device *dev,YCHAR *name, const YCHAR *ohName, int bufferSize);
++static void yaffs_LoadObjectHeaderFromName(yaffs_Device *dev,YCHAR *ohName, const YCHAR *name);
+
+
+ /* Function to calculate chunk and offset */
+@@ -172,7 +160,7 @@ static __u32 ShiftsGE(__u32 x)
+
+ static __u32 Shifts(__u32 x)
+ {
+- int nShifts;
++ __u32 nShifts;
+
+ nShifts = 0;
+
+@@ -203,7 +191,7 @@ static int yaffs_InitialiseTempBuffers(y
+ 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->totalBytesPerChunk);
++ YMALLOC_DMA(dev->param.totalBytesPerChunk);
+ }
+
+ return buf ? YAFFS_OK : YAFFS_FAIL;
+@@ -286,7 +274,7 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
+ return 1;
+ }
+
+- for (i = 0; i < dev->nShortOpCaches; i++) {
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].data == buffer)
+ return 1;
+ }
+@@ -299,6374 +287,4183 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
+ return 0;
+ }
+
+-
+-
+ /*
+- * Chunk bitmap manipulations
++ * Verification code
+ */
+
+-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
+-{
+- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+- blk));
+- YBUG();
+- }
+- return dev->chunkBits +
+- (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);
+
+- memset(blkBits, 0, dev->chunkBitmapStride);
+-}
++/*
++ * Simple hash function. Needs to have a reasonable spread
++ */
+
+-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++static Y_INLINE int yaffs_HashFunction(int n)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+-
+- yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+- blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++ n = abs(n);
++ return n % YAFFS_NOBJECT_BUCKETS;
+ }
+
+-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));
+-}
++/*
++ * Access functions to useful fake objects.
++ * Note that root might have a presence in NAND if permissions are set.
++ */
+
+-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
++yaffs_Object *yaffs_Root(yaffs_Device *dev)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+- yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+- return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++ return dev->rootDir;
+ }
+
+-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+- int i;
+- for (i = 0; i < dev->chunkBitmapStride; i++) {
+- if (*blkBits)
+- return 1;
+- blkBits++;
+- }
+- return 0;
++ return dev->lostNFoundDir;
+ }
+
+-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
+-{
+- __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;
+-}
+
+ /*
+- * Verification code
++ * Erased NAND checking functions
+ */
+
+-static int yaffs_SkipVerification(yaffs_Device *dev)
+-{
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipFullVerification(yaffs_Device *dev)
+-{
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++int yaffs_CheckFF(__u8 *buffer, int nBytes)
+ {
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++ /* Horrible, slow implementation */
++ while (nBytes--) {
++ if (*buffer != 0xFF)
++ return 0;
++ buffer++;
++ }
++ return 1;
+ }
+
+-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)
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND)
+ {
+- int actuallyUsed;
+- int inUse;
++ int retval = YAFFS_OK;
++ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ExtendedTags tags;
++ int result;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+
+- /* Report illegal runtime states */
+- if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
++ if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
++ retval = YAFFS_FAIL;
+
+- 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]));
++ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
++ retval = YAFFS_FAIL;
+ }
+
+- /* 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));
+-
++ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+
+- /* 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));
++ return retval;
+
+- /* 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 void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
+- int n)
++
++static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags)
+ {
+- yaffs_VerifyBlock(dev, bi, n);
++ int retval = YAFFS_OK;
++ yaffs_ExtendedTags tempTags;
++ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
++ int result;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
++ if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
++ tempTags.objectId != tags->objectId ||
++ tempTags.chunkId != tags->chunkId ||
++ tempTags.byteCount != tags->byteCount)
++ retval = YAFFS_FAIL;
+
+- /* After collection the block should be in the erased state */
+- /* This will need to change if we do partial gc */
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
+- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+- 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));
+- }
++ return retval;
+ }
+
+-static void yaffs_VerifyBlocks(yaffs_Device *dev)
++static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags,
++ int useReserve)
+ {
+- int i;
+- int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+- int nIllegalBlockStates = 0;
+-
+- 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 (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+- nBlocksPerState[bi->blockState]++;
+- else
+- nIllegalBlockStates++;
+- }
++ int attempts = 0;
++ int writeOk = 0;
++ int chunk;
+
+- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++ yaffs2_InvalidateCheckpoint(dev);
+
+- 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)));
++ do {
++ yaffs_BlockInfo *bi = 0;
++ int erasedOk = 0;
+
+- for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("%s %d blocks"TENDSTR),
+- blockStateName[i], nBlocksPerState[i]));
++ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
++ if (chunk < 0) {
++ /* no space */
++ break;
++ }
+
+- 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]));
++ /* 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.
++ *
++ * Mods to the above
++ * If an erase check fails or the write fails we skip the
++ * rest of the block.
++ */
+
+- 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]));
++ /* let's give it a try */
++ attempts++;
+
+- 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]));
++ if(dev->param.alwaysCheckErased)
++ bi->skipErasedCheck = 0;
+
+- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++ 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));
+
+-}
++ /* If not erased, delete this one,
++ * skip rest of block and
++ * try another chunk */
++ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
++ yaffs_SkipRestOfBlock(dev);
++ continue;
++ }
++ }
+
+-/*
+- * 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)
+-{
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
++ data, tags);
+
+- 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(!bi->skipErasedCheck)
++ writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
+
+- 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));
++ if (writeOk != YAFFS_OK) {
++ /* Clean up aborted write, skip to next block and
++ * try another chunk */
++ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
++ continue;
++ }
+
+- if (tags->objectId != obj->objectId)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+- tags->objectId, obj->objectId));
++ bi->skipErasedCheck = 1;
+
++ /* Copy the data into the robustification buffer */
++ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+
+- /*
+- * Check that the object's parent ids match if parentCheck requested.
+- *
+- * Tests do not apply to the root object.
+- */
++ } while (writeOk != YAFFS_OK &&
++ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+
+- 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 (!writeOk)
++ chunk = -1;
+
+- 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 (attempts > 1) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
++ attempts));
+
+- if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header name is NULL"TENDSTR),
+- obj->objectId));
++ dev->nRetriedWrites += (attempts - 1);
++ }
+
+- 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));
++ return chunk;
+ }
+
+
++
++/*
++ * Block retiring for handling a broken block.
++ */
+
+-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+- __u32 level, int chunkOffset)
++static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
+ {
+- int i;
+- yaffs_Device *dev = obj->myDev;
+- int ok = 1;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+- if (tn) {
+- if (level > 0) {
++ yaffs2_InvalidateCheckpoint(dev);
++
++ yaffs2_ClearOldestDirtySequence(dev,bi);
+
+- 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) {
++ if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
++ if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR(
++ "yaffs: Failed to mark bad and erase block %d"
++ TENDSTR), blockInNAND));
++ } else {
+ yaffs_ExtendedTags tags;
+- __u32 objectId = obj->objectId;
++ int chunkId = blockInNAND * dev->param.nChunksPerBlock;
+
+- chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+- for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ memset(buffer, 0xff, dev->nDataBytesPerChunk);
++ yaffs_InitialiseTags(&tags);
++ tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
++ if (dev->param.writeChunkWithTagsToNAND(dev, chunkId -
++ dev->chunkOffset, buffer, &tags) != YAFFS_OK)
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
++ TCONT("write bad block marker to block %d")
++ TENDSTR), blockInNAND));
+
+- 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++;
+- }
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ }
+ }
+
+- return ok;
++ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++ bi->gcPrioritise = 0;
++ bi->needsRetiring = 0;
+
++ dev->nRetiredBlocks++;
+ }
+
++/*
++ * Functions for robustisizing TODO
++ *
++ */
+
+-static void yaffs_VerifyFile(yaffs_Object *obj)
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags)
+ {
+- int requiredTallness;
+- int actualTallness;
+- __u32 lastChunk;
+- __u32 x;
+- __u32 i;
+- yaffs_Device *dev;
+- yaffs_ExtendedTags tags;
+- yaffs_Tnode *tn;
+- __u32 objectId;
++ dev=dev;
++ chunkInNAND=chunkInNAND;
++ data=data;
++ tags=tags;
++}
+
+- if (!obj)
+- return;
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_ExtendedTags *tags)
++{
++ dev=dev;
++ chunkInNAND=chunkInNAND;
++ tags=tags;
++}
+
+- if (yaffs_SkipVerification(obj->myDev))
+- return;
++void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
++{
++ if (!bi->gcPrioritise) {
++ bi->gcPrioritise = 1;
++ dev->hasPendingPrioritisedGCs = 1;
++ bi->chunkErrorStrikes++;
+
+- dev = obj->myDev;
+- objectId = obj->objectId;
++ if (bi->chunkErrorStrikes > 3) {
++ bi->needsRetiring = 1; /* Too many stikes, so retire this */
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
+
+- /* 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++;
++ }
+ }
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
++ int erasedOk)
++{
++ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+- actualTallness = obj->variant.fileVariant.topLevel;
++ yaffs_HandleChunkError(dev, bi);
+
+- if (requiredTallness > actualTallness)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
+- obj->objectId, actualTallness, requiredTallness));
++ 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));
++ }
++
++ /* Delete the chunk */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++ yaffs_SkipRestOfBlock(dev);
++}
+
+
+- /* 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.
+- */
++/*---------------- Name handling functions ------------*/
+
+- if (yaffs_SkipNANDVerification(dev))
+- return;
++static __u16 yaffs_CalcNameSum(const YCHAR *name)
++{
++ __u16 sum = 0;
++ __u16 i = 1;
+
+- for (i = 1; i <= lastChunk; i++) {
+- tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
++ const YUCHAR *bname = (const YUCHAR *) name;
++ if (bname) {
++ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
+
+- 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));
+- }
+- }
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++ sum += yaffs_toupper(*bname) * i;
++#else
++ sum += (*bname) * i;
++#endif
++ i++;
++ bname++;
+ }
+ }
++ return sum;
+ }
+
+-
+-static void yaffs_VerifyHardLink(yaffs_Object *obj)
++void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
++ if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
++ yaffs_strcpy(obj->shortName, name);
++ else
++ obj->shortName[0] = _Y('\0');
++#endif
++ obj->sum = yaffs_CalcNameSum(name);
++}
+
+- /* Verify sane equivalent object */
++void yaffs_SetObjectNameFromOH(yaffs_Object *obj, const yaffs_ObjectHeader *oh)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++ YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1];
++ memset(tmpName,0,sizeof(tmpName));
++ yaffs_LoadNameFromObjectHeader(obj->myDev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1);
++ yaffs_SetObjectName(obj,tmpName);
++#else
++ yaffs_SetObjectName(obj,oh->name);
++#endif
+ }
+
+-static void yaffs_VerifySymlink(yaffs_Object *obj)
++/*-------------------- TNODES -------------------
++
++ * List of spare tnodes
++ * The list is hooked together using the first pointer
++ * in the tnode.
++ */
++
++
++yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
++ if (tn){
++ memset(tn, 0, dev->tnodeSize);
++ dev->nTnodes++;
++ }
++
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
+- /* Verify symlink string */
++ return tn;
+ }
+
+-static void yaffs_VerifySpecial(yaffs_Object *obj)
++/* FreeTnode frees up a tnode and puts it back on the free list */
++static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ yaffs_FreeRawTnode(dev,tn);
++ dev->nTnodes--;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+ }
+
+-static void yaffs_VerifyObject(yaffs_Object *obj)
++static void yaffs_DeinitialiseTnodesAndObjects(yaffs_Device *dev)
+ {
+- yaffs_Device *dev;
+-
+- __u32 chunkMin;
+- __u32 chunkMax;
+-
+- __u32 chunkIdOk;
+- __u32 chunkInRange;
+- __u32 chunkShouldNotBeDeleted;
+- __u32 chunkValid;
+-
+- if (!obj)
+- return;
++ yaffs_DeinitialiseRawTnodesAndObjects(dev);
++ dev->nObjects = 0;
++ dev->nTnodes = 0;
++}
+
+- if (obj->beingCreated)
+- return;
+
+- dev = obj->myDev;
++void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
++ unsigned val)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 mask;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
++ val >>= dev->chunkGroupBits;
+
+- /* Check sane object header chunk */
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
+
+- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
+- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
++ mask = dev->tnodeMask << bitInWord;
+
+- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+- chunkIdOk = chunkInRange || obj->hdrChunk == 0;
+- chunkValid = chunkInRange &&
+- yaffs_CheckChunkBit(dev,
+- obj->hdrChunk / dev->nChunksPerBlock,
+- obj->hdrChunk % dev->nChunksPerBlock);
+- chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val << bitInWord));
+
+- if (!obj->fake &&
+- (!chunkIdOk || chunkShouldNotBeDeleted)) {
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+- obj->objectId, obj->hdrChunk,
+- chunkIdOk ? "" : ",out of range",
+- chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val >> bitInWord));
+ }
++}
+
+- if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
+- yaffs_ExtendedTags tags;
+- yaffs_ObjectHeader *oh;
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- oh = (yaffs_ObjectHeader *)buffer;
++__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
++ unsigned pos)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 val;
+
+- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+- &tags);
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
+
+- yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
+
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+- }
++ val = map[wordInMap] >> bitInWord;
+
+- /* 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));
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ val |= (map[wordInMap] << bitInWord);
+ }
+
+- /* 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));
+- }
++ val &= dev->tnodeMask;
++ val <<= dev->chunkGroupBits;
+
+- 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;
+- }
++ return val;
+ }
+
+-static void yaffs_VerifyObjects(yaffs_Device *dev)
++/* ------------------- End of individual tnode manipulation -----------------*/
++
++/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
++ * The look up tree is represented by the top tnode and the number of topLevel
++ * in the tree. 0 means only the level 0 tnode is in the tree.
++ */
++
++/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
++yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId)
+ {
+- yaffs_Object *obj;
+- int i;
+- struct ylist_head *lh;
++ yaffs_Tnode *tn = fStruct->top;
++ __u32 i;
++ int requiredTallness;
++ int level = fStruct->topLevel;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ dev=dev;
+
+- /* Iterate through the objects in each hash entry */
++ /* Check sane level and chunk Id */
++ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
+
+- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+- ylist_for_each(lh, &dev->objectBucket[i].list) {
+- if (lh) {
+- obj = ylist_entry(lh, yaffs_Object, hashLink);
+- yaffs_VerifyObject(obj);
+- }
+- }
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
++
++ /* First check we're tall enough (ie enough topLevel) */
++
++ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (i) {
++ i >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
+ }
+-}
+
++ if (requiredTallness > fStruct->topLevel)
++ return NULL; /* Not tall enough, so we can't find it */
+
+-/*
+- * Simple hash function. Needs to have a reasonable spread
+- */
++ /* Traverse down to level 0 */
++ while (level > 0 && tn) {
++ tn = tn->internal[(chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (level - 1) *
++ YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK];
++ level--;
++ }
+
+-static Y_INLINE int yaffs_HashFunction(int n)
+-{
+- n = abs(n);
+- return n % YAFFS_NOBJECT_BUCKETS;
++ return tn;
+ }
+
+-/*
+- * Access functions to useful fake objects.
+- * Note that root might have a presence in NAND if permissions are set.
++/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
++ * This happens in two steps:
++ * 1. If the tree isn't tall enough, then make it taller.
++ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
++ *
++ * Used when modifying the tree.
++ *
++ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
++ * be plugged into the ttree.
+ */
+
+-yaffs_Object *yaffs_Root(yaffs_Device *dev)
++yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId,
++ yaffs_Tnode *passedTn)
+ {
+- return dev->rootDir;
+-}
++ int requiredTallness;
++ int i;
++ int l;
++ yaffs_Tnode *tn;
+
+-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+-{
+- return dev->lostNFoundDir;
+-}
++ __u32 x;
+
+
+-/*
+- * Erased NAND checking functions
+- */
++ /* Check sane level and page Id */
++ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
+
+-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 &&
+- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+-
+- if (!writeOk)
+- chunk = -1;
+-
+- 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);
+-
+- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR(
+- "yaffs: Failed to mark bad and erase block %d"
+- TENDSTR), blockInNAND));
+- } else {
+- yaffs_ExtendedTags tags;
+- int chunkId = blockInNAND * dev->nChunksPerBlock;
+-
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- memset(buffer, 0xff, dev->nDataBytesPerChunk);
+- yaffs_InitialiseTags(&tags);
+- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
+- dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+- TCONT("write bad block marker to block %d")
+- TENDSTR), blockInNAND));
+-
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+- }
+- }
+-
+- 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));
+- }
+-
+- /* Delete the chunk */
+- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+-}
+-
+-
+-/*---------------- Name handling functions ------------*/
+-
+-static __u16 yaffs_CalcNameSum(const YCHAR *name)
+-{
+- __u16 sum = 0;
+- __u16 i = 1;
+-
+- const YUCHAR *bname = (const YUCHAR *) name;
+- if (bname) {
+- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
+-
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+- sum += yaffs_toupper(*bname) * i;
+-#else
+- sum += (*bname) * i;
+-#endif
+- i++;
+- bname++;
+- }
+- }
+- return sum;
+-}
+-
+-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+-{
+-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
+- yaffs_strcpy(obj->shortName, name);
+- else
+- obj->shortName[0] = _Y('\0');
+-#endif
+- obj->sum = yaffs_CalcNameSum(name);
+-}
+-
+-/*-------------------- TNODES -------------------
+-
+- * List of spare tnodes
+- * The list is hooked together using the first pointer
+- * in the tnode.
+- */
+-
+-/* yaffs_CreateTnodes creates a bunch more tnodes and
+- * adds them to the tnode free list.
+- * Don't use this function directly
+- */
+-
+-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
+-{
+- int i;
+- int tnodeSize;
+- yaffs_Tnode *newTnodes;
+- __u8 *mem;
+- yaffs_Tnode *curr;
+- yaffs_Tnode *next;
+- yaffs_TnodeList *tnl;
+-
+- if (nTnodes < 1)
+- return YAFFS_OK;
+-
+- /* Calculate the tnode size in bytes for variable width tnode support.
+- * Must be a multiple of 32-bits */
+- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- /* make these things */
+-
+- newTnodes = YMALLOC(nTnodes * tnodeSize);
+- mem = (__u8 *)newTnodes;
+-
+- if (!newTnodes) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+- return YAFFS_FAIL;
+- }
+-
+- /* Hook them into the free list */
+-#if 0
+- for (i = 0; i < nTnodes - 1; i++) {
+- newTnodes[i].internal[0] = &newTnodes[i + 1];
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- }
+-
+- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- dev->freeTnodes = newTnodes;
+-#else
+- /* New hookup for wide tnodes */
+- for (i = 0; i < nTnodes - 1; i++) {
+- curr = (yaffs_Tnode *) &mem[i * tnodeSize];
+- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
+- curr->internal[0] = next;
+- }
+-
+- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
+- curr->internal[0] = dev->freeTnodes;
+- dev->freeTnodes = (yaffs_Tnode *)mem;
+-
+-#endif
+-
+-
+- dev->nFreeTnodes += nTnodes;
+- dev->nTnodesCreated += nTnodes;
+-
+- /* Now add this bunch of tnodes to a list for freeing up.
+- * NB If we can't add this to the management list it isn't fatal
+- * but it just means we can't free this bunch of tnodes later.
+- */
+-
+- tnl = YMALLOC(sizeof(yaffs_TnodeList));
+- if (!tnl) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs: Could not add tnodes to management list" TENDSTR)));
+- return YAFFS_FAIL;
+- } else {
+- tnl->tnodes = newTnodes;
+- tnl->next = dev->allocatedTnodeList;
+- dev->allocatedTnodeList = tnl;
+- }
+-
+- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+-
+- return YAFFS_OK;
+-}
+-
+-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
+-
+-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
+-{
+- yaffs_Tnode *tn = NULL;
+-
+- /* If there are none left make more */
+- if (!dev->freeTnodes)
+- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+-
+- if (dev->freeTnodes) {
+- tn = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
+- /* Hoosterman, this thing looks like it isn't in the list */
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+- }
+-#endif
+- dev->freeTnodes = dev->freeTnodes->internal[0];
+- dev->nFreeTnodes--;
+- }
+-
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-
+- return tn;
+-}
+-
+-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+-{
+- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- if (tn)
+- memset(tn, 0, tnodeSize);
+-
+- return tn;
+-}
+-
+-/* FreeTnode frees up a tnode and puts it back on the free list */
+-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+-{
+- if (tn) {
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
+- /* Hoosterman, this thing looks like it is already in the list */
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+- }
+- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- tn->internal[0] = dev->freeTnodes;
+- dev->freeTnodes = tn;
+- dev->nFreeTnodes++;
+- }
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-}
+-
+-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
+-{
+- /* Free the list of allocated tnodes */
+- yaffs_TnodeList *tmp;
+-
+- while (dev->allocatedTnodeList) {
+- tmp = dev->allocatedTnodeList->next;
+-
+- YFREE(dev->allocatedTnodeList->tnodes);
+- YFREE(dev->allocatedTnodeList);
+- dev->allocatedTnodeList = tmp;
+-
+- }
+-
+- dev->freeTnodes = NULL;
+- dev->nFreeTnodes = 0;
+-}
+-
+-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
+-{
+- dev->allocatedTnodeList = NULL;
+- dev->freeTnodes = NULL;
+- dev->nFreeTnodes = 0;
+- dev->nTnodesCreated = 0;
+-}
+-
+-
+-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+- unsigned val)
+-{
+- __u32 *map = (__u32 *)tn;
+- __u32 bitInMap;
+- __u32 bitInWord;
+- __u32 wordInMap;
+- __u32 mask;
+-
+- pos &= YAFFS_TNODES_LEVEL0_MASK;
+- val >>= dev->chunkGroupBits;
+-
+- bitInMap = pos * dev->tnodeWidth;
+- wordInMap = bitInMap / 32;
+- bitInWord = bitInMap & (32 - 1);
+-
+- mask = dev->tnodeMask << bitInWord;
+-
+- map[wordInMap] &= ~mask;
+- map[wordInMap] |= (mask & (val << bitInWord));
+-
+- if (dev->tnodeWidth > (32 - bitInWord)) {
+- bitInWord = (32 - bitInWord);
+- wordInMap++;;
+- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+- map[wordInMap] &= ~mask;
+- map[wordInMap] |= (mask & (val >> bitInWord));
+- }
+-}
+-
+-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+- unsigned pos)
+-{
+- __u32 *map = (__u32 *)tn;
+- __u32 bitInMap;
+- __u32 bitInWord;
+- __u32 wordInMap;
+- __u32 val;
+-
+- pos &= YAFFS_TNODES_LEVEL0_MASK;
+-
+- bitInMap = pos * dev->tnodeWidth;
+- wordInMap = bitInMap / 32;
+- bitInWord = bitInMap & (32 - 1);
+-
+- val = map[wordInMap] >> bitInWord;
+-
+- if (dev->tnodeWidth > (32 - bitInWord)) {
+- bitInWord = (32 - bitInWord);
+- wordInMap++;;
+- val |= (map[wordInMap] << bitInWord);
+- }
+-
+- val &= dev->tnodeMask;
+- val <<= dev->chunkGroupBits;
+-
+- return val;
+-}
+-
+-/* ------------------- End of individual tnode manipulation -----------------*/
+-
+-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
+- * The look up tree is represented by the top tnode and the number of topLevel
+- * in the tree. 0 means only the level 0 tnode is in the tree.
+- */
+-
+-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct,
+- __u32 chunkId)
+-{
+- yaffs_Tnode *tn = fStruct->top;
+- __u32 i;
+- int requiredTallness;
+- int level = fStruct->topLevel;
+-
+- /* Check sane level and chunk Id */
+- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+- return NULL;
+-
+- if (chunkId > YAFFS_MAX_CHUNK_ID)
+- return NULL;
+-
+- /* First check we're tall enough (ie enough topLevel) */
+-
+- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+- requiredTallness = 0;
+- while (i) {
+- i >>= YAFFS_TNODES_INTERNAL_BITS;
+- requiredTallness++;
+- }
+-
+- if (requiredTallness > fStruct->topLevel)
+- return NULL; /* Not tall enough, so we can't find it */
+-
+- /* Traverse down to level 0 */
+- while (level > 0 && tn) {
+- tn = tn->internal[(chunkId >>
+- (YAFFS_TNODES_LEVEL0_BITS +
+- (level - 1) *
+- YAFFS_TNODES_INTERNAL_BITS)) &
+- YAFFS_TNODES_INTERNAL_MASK];
+- level--;
+- }
+-
+- return tn;
+-}
+-
+-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
+- * This happens in two steps:
+- * 1. If the tree isn't tall enough, then make it taller.
+- * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
+- *
+- * Used when modifying the tree.
+- *
+- * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
+- * be plugged into the ttree.
+- */
+-
+-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct,
+- __u32 chunkId,
+- yaffs_Tnode *passedTn)
+-{
+- int requiredTallness;
+- int i;
+- int l;
+- yaffs_Tnode *tn;
+-
+- __u32 x;
+-
+-
+- /* Check sane level and page Id */
+- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
+- return NULL;
+-
+- if (chunkId > YAFFS_MAX_CHUNK_ID)
+- return NULL;
+-
+- /* First check we're tall enough (ie enough topLevel) */
+-
+- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+- requiredTallness = 0;
+- while (x) {
+- x >>= YAFFS_TNODES_INTERNAL_BITS;
+- requiredTallness++;
+- }
+-
+-
+- if (requiredTallness > fStruct->topLevel) {
+- /* Not tall enough, gotta make the tree taller */
+- for (i = fStruct->topLevel; i < requiredTallness; i++) {
+-
+- tn = yaffs_GetTnode(dev);
+-
+- if (tn) {
+- tn->internal[0] = fStruct->top;
+- fStruct->top = tn;
+- } else {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs: no more tnodes" TENDSTR)));
+- }
+- }
+-
+- fStruct->topLevel = requiredTallness;
+- }
+-
+- /* Traverse down to level 0, adding anything we need */
+-
+- l = fStruct->topLevel;
+- tn = fStruct->top;
+-
+- if (l > 0) {
+- while (l > 0 && tn) {
+- x = (chunkId >>
+- (YAFFS_TNODES_LEVEL0_BITS +
+- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+- YAFFS_TNODES_INTERNAL_MASK;
+-
+-
+- if ((l > 1) && !tn->internal[x]) {
+- /* Add missing non-level-zero tnode */
+- tn->internal[x] = yaffs_GetTnode(dev);
+-
+- } else if (l == 1) {
+- /* Looking from level 1 at level 0 */
+- if (passedTn) {
+- /* If we already have one, then release it.*/
+- if (tn->internal[x])
+- yaffs_FreeTnode(dev, tn->internal[x]);
+- tn->internal[x] = passedTn;
+-
+- } else if (!tn->internal[x]) {
+- /* Don't have one, none passed in */
+- tn->internal[x] = yaffs_GetTnode(dev);
+- }
+- }
+-
+- tn = tn->internal[x];
+- l--;
+- }
+- } else {
+- /* top is level 0 */
+- if (passedTn) {
+- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+- yaffs_FreeTnode(dev, passedTn);
+- }
+- }
+-
+- return tn;
+-}
+-
+-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+- yaffs_ExtendedTags *tags, int objectId,
+- int chunkInInode)
+-{
+- int j;
+-
+- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
+- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
+- theChunk % dev->nChunksPerBlock)) {
+- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
+- tags);
+- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
+- /* found it; */
+- return theChunk;
+- }
+- }
+- theChunk++;
+- }
+- return -1;
+-}
+-
+-
+-/* DeleteWorker scans backwards through the tnode tree and deletes all the
+- * chunks and tnodes in the file
+- * Returns 1 if the tree was deleted.
+- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
+- */
+-
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+- int chunkOffset, int *limit)
+-{
+- int i;
+- int chunkInInode;
+- int theChunk;
+- yaffs_ExtendedTags tags;
+- int foundChunk;
+- yaffs_Device *dev = in->myDev;
+-
+- int allDone = 1;
+-
+- if (tn) {
+- if (level > 0) {
+- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+- i--) {
+- if (tn->internal[i]) {
+- if (limit && (*limit) < 0) {
+- allDone = 0;
+- } else {
+- allDone =
+- yaffs_DeleteWorker(in,
+- tn->
+- internal
+- [i],
+- level -
+- 1,
+- (chunkOffset
+- <<
+- YAFFS_TNODES_INTERNAL_BITS)
+- + i,
+- limit);
+- }
+- if (allDone) {
+- yaffs_FreeTnode(dev,
+- tn->
+- internal[i]);
+- tn->internal[i] = NULL;
+- }
+- }
+- }
+- return (allDone) ? 1 : 0;
+- } else if (level == 0) {
+- int hitLimit = 0;
+-
+- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
+- i--) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+- if (theChunk) {
+-
+- chunkInInode = (chunkOffset <<
+- YAFFS_TNODES_LEVEL0_BITS) + i;
+-
+- foundChunk =
+- yaffs_FindChunkInGroup(dev,
+- theChunk,
+- &tags,
+- in->objectId,
+- chunkInInode);
+-
+- if (foundChunk > 0) {
+- yaffs_DeleteChunk(dev,
+- foundChunk, 1,
+- __LINE__);
+- in->nDataChunks--;
+- if (limit) {
+- *limit = *limit - 1;
+- if (*limit <= 0)
+- hitLimit = 1;
+- }
+-
+- }
+-
+- yaffs_PutLevel0Tnode(dev, tn, i, 0);
+- }
+-
+- }
+- return (i < 0) ? 1 : 0;
+-
+- }
+-
+- }
+-
+- return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
+-{
+- yaffs_BlockInfo *theBlock;
+-
+- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+-
+- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
+- if (theBlock) {
+- theBlock->softDeletions++;
+- dev->nFreeChunks++;
+- }
+-}
+-
+-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
+- * All soft deleting does is increment the block's softdelete count and pulls the chunk out
+- * of the tnode.
+- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
+- */
+-
+-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
+- __u32 level, int chunkOffset)
+-{
+- int i;
+- int theChunk;
+- int allDone = 1;
+- yaffs_Device *dev = in->myDev;
+-
+- if (tn) {
+- if (level > 0) {
+-
+- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+- i--) {
+- if (tn->internal[i]) {
+- allDone =
+- yaffs_SoftDeleteWorker(in,
+- tn->
+- internal[i],
+- level - 1,
+- (chunkOffset
+- <<
+- YAFFS_TNODES_INTERNAL_BITS)
+- + i);
+- if (allDone) {
+- yaffs_FreeTnode(dev,
+- tn->
+- internal[i]);
+- tn->internal[i] = NULL;
+- } else {
+- /* Hoosterman... how could this happen? */
+- }
+- }
+- }
+- return (allDone) ? 1 : 0;
+- } else if (level == 0) {
+-
+- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+- if (theChunk) {
+- /* Note this does not find the real chunk, only the chunk group.
+- * We make an assumption that a chunk group is not larger than
+- * a block.
+- */
+- yaffs_SoftDeleteChunk(dev, theChunk);
+- yaffs_PutLevel0Tnode(dev, tn, i, 0);
+- }
+-
+- }
+- return 1;
+-
+- }
+-
+- }
+-
+- return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
+-{
+- if (obj->deleted &&
+- obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
+- if (obj->nDataChunks <= 0) {
+- /* Empty file with no duplicate object headers, just delete it immediately */
+- yaffs_FreeTnode(obj->myDev,
+- obj->variant.fileVariant.top);
+- obj->variant.fileVariant.top = NULL;
+- T(YAFFS_TRACE_TRACING,
+- (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+- obj->objectId));
+- yaffs_DoGenericObjectDeletion(obj);
+- } else {
+- yaffs_SoftDeleteWorker(obj,
+- obj->variant.fileVariant.top,
+- obj->variant.fileVariant.
+- topLevel, 0);
+- obj->softDeleted = 1;
+- }
+- }
+-}
+-
+-/* Pruning removes any part of the file structure tree that is beyond the
+- * bounds of the file (ie that does not point to chunks).
+- *
+- * A file should only get pruned when its size is reduced.
+- *
+- * Before pruning, the chunks must be pulled from the tree and the
+- * level 0 tnode entries must be zeroed out.
+- * Could also use this for file deletion, but that's probably better handled
+- * by a special case.
+- */
+-
+-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+- __u32 level, int del0)
+-{
+- int i;
+- int hasData;
+-
+- if (tn) {
+- hasData = 0;
+-
+- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+- if (tn->internal[i] && level > 0) {
+- tn->internal[i] =
+- yaffs_PruneWorker(dev, tn->internal[i],
+- level - 1,
+- (i == 0) ? del0 : 1);
+- }
+-
+- if (tn->internal[i])
+- hasData++;
+- }
+-
+- if (hasData == 0 && del0) {
+- /* Free and return NULL */
+-
+- yaffs_FreeTnode(dev, tn);
+- tn = NULL;
+- }
+-
+- }
+-
+- return tn;
+-
+-}
+-
+-static int yaffs_PruneFileStructure(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct)
+-{
+- int i;
+- int hasData;
+- int done = 0;
+- yaffs_Tnode *tn;
+-
+- if (fStruct->topLevel > 0) {
+- fStruct->top =
+- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+-
+- /* Now we have a tree with all the non-zero branches NULL but the height
+- * is the same as it was.
+- * Let's see if we can trim internal tnodes to shorten the tree.
+- * We can do this if only the 0th element in the tnode is in use
+- * (ie all the non-zero are NULL)
+- */
+-
+- while (fStruct->topLevel && !done) {
+- tn = fStruct->top;
+-
+- hasData = 0;
+- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+- if (tn->internal[i])
+- hasData++;
+- }
+-
+- if (!hasData) {
+- fStruct->top = tn->internal[0];
+- fStruct->topLevel--;
+- yaffs_FreeTnode(dev, tn);
+- } else {
+- done = 1;
+- }
+- }
+- }
+-
+- return YAFFS_OK;
+-}
+-
+-/*-------------------- End of File Structure functions.-------------------*/
+-
+-/* yaffs_CreateFreeObjects creates a bunch more objects and
+- * adds them to the object free list.
+- */
+-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+-{
+- int i;
+- yaffs_Object *newObjects;
+- yaffs_ObjectList *list;
+-
+- if (nObjects < 1)
+- return YAFFS_OK;
+-
+- /* make these things */
+- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+- list = YMALLOC(sizeof(yaffs_ObjectList));
+-
+- 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;
+- }
+-
+- /* Hook them into the free list */
+- for (i = 0; i < nObjects - 1; i++) {
+- newObjects[i].siblings.next =
+- (struct ylist_head *)(&newObjects[i + 1]);
+- }
+-
+- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
+- dev->freeObjects = newObjects;
+- dev->nFreeObjects += nObjects;
+- dev->nObjectsCreated += nObjects;
+-
+- /* Now add this bunch of Objects to a list for freeing up. */
+-
+- list->objects = newObjects;
+- list->next = dev->allocatedObjectList;
+- dev->allocatedObjectList = list;
+-
+- return YAFFS_OK;
+-}
+-
+-
+-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+-{
+- yaffs_Object *tn = NULL;
+-
+-#ifdef VALGRIND_TEST
+- tn = YMALLOC(sizeof(yaffs_Object));
+-#else
+- /* If there are none left make more */
+- if (!dev->freeObjects)
+- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+-
+- if (dev->freeObjects) {
+- tn = dev->freeObjects;
+- dev->freeObjects =
+- (yaffs_Object *) (dev->freeObjects->siblings.next);
+- dev->nFreeObjects--;
+- }
+-#endif
+- if (tn) {
+- /* Now sweeten it up... */
+-
+- memset(tn, 0, sizeof(yaffs_Object));
+- tn->beingCreated = 1;
+-
+- tn->myDev = dev;
+- tn->hdrChunk = 0;
+- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+- YINIT_LIST_HEAD(&(tn->hardLinks));
+- YINIT_LIST_HEAD(&(tn->hashLink));
+- YINIT_LIST_HEAD(&tn->siblings);
+-
+-
+- /* Now make the directory sane */
+- if (dev->rootDir) {
+- tn->parent = dev->rootDir;
+- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+- }
+-
+- /* Add it to the lost and found directory.
+- * NB Can't put root or lostNFound in lostNFound so
+- * check if lostNFound exists first
+- */
+- if (dev->lostNFoundDir)
+- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
+-
+- tn->beingCreated = 0;
+- }
+-
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-
+- return tn;
+-}
+-
+-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
+- __u32 mode)
+-{
+-
+- yaffs_Object *obj =
+- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+- if (obj) {
+- obj->fake = 1; /* it is fake so it might have no NAND presence... */
+- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
+- obj->unlinkAllowed = 0; /* ... or unlink it */
+- obj->deleted = 0;
+- obj->unlinked = 0;
+- obj->yst_mode = mode;
+- obj->myDev = dev;
+- obj->hdrChunk = 0; /* Not a valid chunk. */
+- }
+-
+- return obj;
+-
+-}
+-
+-static void yaffs_UnhashObject(yaffs_Object *tn)
+-{
+- int bucket;
+- yaffs_Device *dev = tn->myDev;
+-
+- /* If it is still linked into the bucket list, free from the list */
+- if (!ylist_empty(&tn->hashLink)) {
+- ylist_del_init(&tn->hashLink);
+- bucket = yaffs_HashFunction(tn->objectId);
+- dev->objectBucket[bucket].count--;
+- }
+-}
+-
+-/* FreeObject frees up a Object and puts it back on the free list */
+-static void yaffs_FreeObject(yaffs_Object *tn)
+-{
+- yaffs_Device *dev = tn->myDev;
+-
+-#ifdef __KERNEL__
+- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
+-#endif
+-
+- if (tn->parent)
+- YBUG();
+- if (!ylist_empty(&tn->siblings))
+- YBUG();
+-
+-
+-#ifdef __KERNEL__
+- if (tn->myInode) {
+- /* We're still hooked up to a cached inode.
+- * Don't delete now, but mark for later deletion
+- */
+- tn->deferedFree = 1;
+- return;
+- }
+-#endif
+-
+- yaffs_UnhashObject(tn);
+-
+-#ifdef VALGRIND_TEST
+- YFREE(tn);
+-#else
+- /* Link into the free list. */
+- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
+- dev->freeObjects = tn;
+- dev->nFreeObjects++;
+-#endif
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-}
+-
+-#ifdef __KERNEL__
+-
+-void yaffs_HandleDeferedFree(yaffs_Object *obj)
+-{
+- if (obj->deferedFree)
+- yaffs_FreeObject(obj);
+-}
+-
+-#endif
+-
+-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
+-{
+- /* Free the list of allocated Objects */
+-
+- yaffs_ObjectList *tmp;
+-
+- while (dev->allocatedObjectList) {
+- tmp = dev->allocatedObjectList->next;
+- YFREE(dev->allocatedObjectList->objects);
+- YFREE(dev->allocatedObjectList);
+-
+- dev->allocatedObjectList = tmp;
+- }
+-
+- dev->freeObjects = NULL;
+- dev->nFreeObjects = 0;
+-}
+-
+-static void yaffs_InitialiseObjects(yaffs_Device *dev)
+-{
+- int i;
+-
+- dev->allocatedObjectList = NULL;
+- dev->freeObjects = NULL;
+- dev->nFreeObjects = 0;
+-
+- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+- YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+- dev->objectBucket[i].count = 0;
+- }
+-}
+-
+-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
+-{
+- static int x;
+- int i;
+- int l = 999;
+- int lowest = 999999;
+-
+- /* First let's see if we can find one that's empty. */
+-
+- for (i = 0; i < 10 && lowest > 0; i++) {
+- x++;
+- x %= YAFFS_NOBJECT_BUCKETS;
+- if (dev->objectBucket[x].count < lowest) {
+- lowest = dev->objectBucket[x].count;
+- l = x;
+- }
+-
+- }
+-
+- /* If we didn't find an empty list, then try
+- * looking a bit further for a short one
+- */
+-
+- for (i = 0; i < 10 && lowest > 3; i++) {
+- x++;
+- x %= YAFFS_NOBJECT_BUCKETS;
+- if (dev->objectBucket[x].count < lowest) {
+- lowest = dev->objectBucket[x].count;
+- l = x;
+- }
+-
+- }
+-
+- return l;
+-}
+-
+-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+-{
+- int bucket = yaffs_FindNiceObjectBucket(dev);
+-
+- /* Now find an object value that has not already been taken
+- * by scanning the list.
+- */
+-
+- int found = 0;
+- struct ylist_head *i;
+-
+- __u32 n = (__u32) bucket;
+-
+- /* yaffs_CheckObjectHashSanity(); */
+-
+- while (!found) {
+- found = 1;
+- n += YAFFS_NOBJECT_BUCKETS;
+- if (1 || dev->objectBucket[bucket].count > 0) {
+- ylist_for_each(i, &dev->objectBucket[bucket].list) {
+- /* If there is already one in the list */
+- if (i && ylist_entry(i, yaffs_Object,
+- hashLink)->objectId == n) {
+- found = 0;
+- }
+- }
+- }
+- }
+-
+- return n;
+-}
+-
+-static void yaffs_HashObject(yaffs_Object *in)
+-{
+- int bucket = yaffs_HashFunction(in->objectId);
+- yaffs_Device *dev = in->myDev;
+-
+- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+- dev->objectBucket[bucket].count++;
+-}
+-
+-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
+-{
+- int bucket = yaffs_HashFunction(number);
+- struct ylist_head *i;
+- yaffs_Object *in;
+-
+- ylist_for_each(i, &dev->objectBucket[bucket].list) {
+- /* Look if it is in the list */
+- if (i) {
+- in = ylist_entry(i, yaffs_Object, hashLink);
+- if (in->objectId == number) {
+-#ifdef __KERNEL__
+- /* Don't tell the VFS about this one if it is defered free */
+- if (in->deferedFree)
+- return NULL;
+-#endif
+-
+- return in;
+- }
+- }
+- }
+-
+- return NULL;
+-}
+-
+-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+- yaffs_ObjectType type)
+-{
+- yaffs_Object *theObject;
+- yaffs_Tnode *tn = NULL;
+-
+- 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->renameAllowed = 1;
+- theObject->unlinkAllowed = 1;
+- theObject->objectId = number;
+- yaffs_HashObject(theObject);
+- theObject->variantType = type;
+-#ifdef CONFIG_YAFFS_WINCE
+- yfsd_WinFileTimeNow(theObject->win_atime);
+- theObject->win_ctime[0] = theObject->win_mtime[0] =
+- theObject->win_atime[0];
+- theObject->win_ctime[1] = theObject->win_mtime[1] =
+- theObject->win_atime[1];
+-
+-#else
+-
+- theObject->yst_atime = theObject->yst_mtime =
+- theObject->yst_ctime = Y_CURRENT_TIME;
+-#endif
+- switch (type) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- theObject->variant.fileVariant.fileSize = 0;
+- theObject->variant.fileVariant.scannedFileSize = 0;
+- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+- theObject->variant.fileVariant.topLevel = 0;
+- theObject->variant.fileVariant.top = tn;
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+- children);
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* No action required */
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* todo this should not happen */
+- break;
+- }
+- }
+-
+- return theObject;
+-}
+-
+-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+- int number,
+- yaffs_ObjectType type)
+-{
+- yaffs_Object *theObject = NULL;
+-
+- if (number > 0)
+- theObject = yaffs_FindObjectByNumber(dev, number);
+-
+- if (!theObject)
+- theObject = yaffs_CreateNewObject(dev, number, type);
+-
+- return theObject;
+-
+-}
+-
+-
+-static YCHAR *yaffs_CloneString(const YCHAR *str)
+-{
+- YCHAR *newStr = NULL;
+-
+- if (str && *str) {
+- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
+- if (newStr)
+- yaffs_strcpy(newStr, str);
+- }
+-
+- return newStr;
+-
+-}
+-
+-/*
+- * Mknod (create) a new object.
+- * equivalentObject only has meaning for a hard link;
+- * aliasString only has meaning for a sumlink.
+- * rdev only has meaning for devices (a subset of special objects)
+- */
+-
+-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
+- yaffs_Object *parent,
+- const YCHAR *name,
+- __u32 mode,
+- __u32 uid,
+- __u32 gid,
+- yaffs_Object *equivalentObject,
+- const YCHAR *aliasString, __u32 rdev)
+-{
+- yaffs_Object *in;
+- YCHAR *str = NULL;
+-
+- yaffs_Device *dev = parent->myDev;
+-
+- /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
+- if (yaffs_FindObjectByName(parent, name))
+- return NULL;
+-
+- in = yaffs_CreateNewObject(dev, -1, type);
+-
+- if (!in)
+- return YAFFS_FAIL;
+-
+- if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+- str = yaffs_CloneString(aliasString);
+- if (!str) {
+- yaffs_FreeObject(in);
+- return NULL;
+- }
+- }
+-
+-
+-
+- if (in) {
+- in->hdrChunk = 0;
+- in->valid = 1;
+- in->variantType = type;
+-
+- in->yst_mode = mode;
+-
+-#ifdef CONFIG_YAFFS_WINCE
+- yfsd_WinFileTimeNow(in->win_atime);
+- in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+- in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
+-
+-#else
+- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+-
+- in->yst_rdev = rdev;
+- in->yst_uid = uid;
+- in->yst_gid = gid;
+-#endif
+- in->nDataChunks = 0;
+-
+- yaffs_SetObjectName(in, name);
+- in->dirty = 1;
+-
+- yaffs_AddObjectToDirectory(parent, in);
+-
+- in->myDev = parent->myDev;
+-
+- switch (type) {
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- in->variant.symLinkVariant.alias = str;
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- in->variant.hardLinkVariant.equivalentObject =
+- equivalentObject;
+- in->variant.hardLinkVariant.equivalentObjectId =
+- equivalentObject->objectId;
+- ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
+- break;
+- case YAFFS_OBJECT_TYPE_FILE:
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* do nothing */
+- break;
+- }
+-
+- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
+- /* Could not create the object header, fail the creation */
+- yaffs_DeleteObject(in);
+- in = NULL;
+- }
+-
+- }
+-
+- return in;
+-}
+-
+-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+- uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
+- mode, uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+- uid, gid, NULL, NULL, rdev);
+-}
+-
+-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid,
+- const YCHAR *alias)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+- uid, gid, NULL, alias, 0);
+-}
+-
+-/* yaffs_Link returns the object id of the equivalent object.*/
+-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+- yaffs_Object *equivalentObject)
+-{
+- /* Get the real object in case we were fed a hard link as an equivalent object */
+- equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+-
+- if (yaffs_MknodObject
+- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+- equivalentObject, NULL, 0)) {
+- return equivalentObject;
+- } else {
+- return NULL;
+- }
+-
+-}
+-
+-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+- const YCHAR *newName, int force, int shadows)
+-{
+- int unlinkOp;
+- int deleteOp;
+-
+- yaffs_Object *existingTarget;
+-
+- if (newDir == NULL)
+- newDir = obj->parent; /* use the old directory */
+-
+- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR
+- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+- TENDSTR)));
+- YBUG();
+- }
+-
+- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+- if (obj->myDev->isYaffs2)
+- unlinkOp = (newDir == obj->myDev->unlinkedDir);
+- else
+- unlinkOp = (newDir == obj->myDev->unlinkedDir
+- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
+-
+- deleteOp = (newDir == obj->myDev->deletedDir);
+-
+- existingTarget = yaffs_FindObjectByName(newDir, newName);
+-
+- /* If the object is a file going into the unlinked directory,
+- * then it is OK to just stuff it in since duplicate names are allowed.
+- * else only proceed if the new name does not exist and if we're putting
+- * it into a directory.
+- */
+- if ((unlinkOp ||
+- deleteOp ||
+- force ||
+- (shadows > 0) ||
+- !existingTarget) &&
+- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
+- yaffs_SetObjectName(obj, newName);
+- obj->dirty = 1;
+-
+- yaffs_AddObjectToDirectory(newDir, obj);
+-
+- if (unlinkOp)
+- obj->unlinked = 1;
+-
+- /* If it is a deletion then we mark it as a shrink for gc purposes. */
+- if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
+- return YAFFS_OK;
+- }
+-
+- return YAFFS_FAIL;
+-}
+-
+-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+- yaffs_Object *newDir, const YCHAR *newName)
+-{
+- yaffs_Object *obj = NULL;
+- yaffs_Object *existingTarget = NULL;
+- int force = 0;
+-
+-
+- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+- YBUG();
+- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+- YBUG();
+-
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+- /* Special case for case insemsitive systems (eg. WinCE).
+- * While look-up is case insensitive, the name isn't.
+- * Therefore we might want to change x.txt to X.txt
+- */
+- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
+- force = 1;
+-#endif
+-
+- else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+- /* ENAMETOOLONG */
+- return YAFFS_FAIL;
+-
+- obj = yaffs_FindObjectByName(oldDir, oldName);
+-
+- if (obj && obj->renameAllowed) {
+-
+- /* Now do the handling for an existing target, if there is one */
+-
+- existingTarget = yaffs_FindObjectByName(newDir, newName);
+- if (existingTarget &&
+- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+- !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
+- /* There is a target that is a non-empty directory, so we fail */
+- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
+- } else if (existingTarget && existingTarget != obj) {
+- /* Nuke the target first, using shadowing,
+- * but only if it isn't the same object
+- */
+- yaffs_ChangeObjectName(obj, newDir, newName, force,
+- existingTarget->objectId);
+- yaffs_UnlinkObject(existingTarget);
+- }
+-
+- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+- }
+- return YAFFS_FAIL;
+-}
+-
+-/*------------------------- Block Management and Page Allocation ----------------*/
+-
+-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
+-{
+- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+-
+- dev->blockInfo = NULL;
+- dev->chunkBits = NULL;
+-
+- dev->allocationBlock = -1; /* force it to get a new one */
+-
+- /* 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));
+- dev->blockInfoAlt = 1;
+- } 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;
+- } else
+- dev->chunkBitsAlt = 0;
+- }
+-
+- if (dev->blockInfo && dev->chunkBits) {
+- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
+- return YAFFS_OK;
+- }
+-
+- return YAFFS_FAIL;
+-}
+-
+-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
+-{
+- if (dev->blockInfoAlt && dev->blockInfo)
+- YFREE_ALT(dev->blockInfo);
+- else if (dev->blockInfo)
+- YFREE(dev->blockInfo);
+-
+- dev->blockInfoAlt = 0;
+-
+- dev->blockInfo = NULL;
+-
+- if (dev->chunkBitsAlt && dev->chunkBits)
+- YFREE_ALT(dev->chunkBits);
+- else if (dev->chunkBits)
+- YFREE(dev->chunkBits);
+- dev->chunkBitsAlt = 0;
+- dev->chunkBits = NULL;
+-}
+-
+-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+- yaffs_BlockInfo *bi)
+-{
+- int i;
+- __u32 seq;
+- yaffs_BlockInfo *b;
+-
+- if (!dev->isYaffs2)
+- return 1; /* disqualification only applies to yaffs2. */
+-
+- if (!bi->hasShrinkHeader)
+- return 1; /* can gc */
+-
+- /* Find the oldest dirty sequence number if we don't know it and save it
+- * so we don't have to keep recomputing it.
+- */
+- if (!dev->oldestDirtySequence) {
+- seq = dev->sequenceNumber;
+-
+- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
+- i++) {
+- b = yaffs_GetBlockInfo(dev, i);
+- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
+- (b->pagesInUse - b->softDeletions) <
+- dev->nChunksPerBlock && b->sequenceNumber < seq) {
+- seq = b->sequenceNumber;
+- }
+- }
+- dev->oldestDirtySequence = seq;
+- }
+-
+- /* Can't do gc of this block if there are any blocks older than this one that have
+- * discarded pages.
+- */
+- return (bi->sequenceNumber <= dev->oldestDirtySequence);
+-}
+-
+-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
+- * for garbage collection.
+- */
+-
+-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+- int aggressive)
+-{
+- int b = dev->currentDirtyChecker;
+-
+- int i;
+- int iterations;
+- int dirtiest = -1;
+- int pagesInUse = 0;
+- int prioritised = 0;
+- yaffs_BlockInfo *bi;
+- int pendingPrioritisedExist = 0;
+-
+- /* First let's see if we need to grab a prioritised block */
+- if (dev->hasPendingPrioritisedGCs) {
+- 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 &&
+- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+- pagesInUse = (bi->pagesInUse - bi->softDeletions);
+- dirtiest = i;
+- prioritised = 1;
+- aggressive = 1; /* Fool the non-aggressive skip logiv below */
+- }
+- }
+- }
+-
+- if (!pendingPrioritisedExist) /* None found, so we can clear this */
+- dev->hasPendingPrioritisedGCs = 0;
+- }
+-
+- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
+- * search harder.
+- * else (we're doing a leasurely gc), then we only bother to do this if the
+- * block has only a few pages in use.
+- */
+-
+- dev->nonAggressiveSkip--;
+-
+- if (!aggressive && (dev->nonAggressiveSkip > 0))
+- return -1;
+-
+- if (!prioritised)
+- pagesInUse =
+- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+-
+- if (aggressive)
+- iterations =
+- dev->internalEndBlock - dev->internalStartBlock + 1;
+- else {
+- iterations =
+- dev->internalEndBlock - dev->internalStartBlock + 1;
+- iterations = iterations / 16;
+- if (iterations > 200)
+- iterations = 200;
+- }
+-
+- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
+- b++;
+- if (b < dev->internalStartBlock || b > dev->internalEndBlock)
+- b = dev->internalStartBlock;
+-
+- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> Block %d is not valid" TENDSTR), b));
+- YBUG();
+- }
+-
+- bi = yaffs_GetBlockInfo(dev, b);
+-
+- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+- dirtiest = b;
+- pagesInUse = (bi->pagesInUse - bi->softDeletions);
+- }
+- }
+-
+- dev->currentDirtyChecker = b;
+-
+- if (dirtiest > 0) {
+- T(YAFFS_TRACE_GC,
+- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
+- dev->nChunksPerBlock - pagesInUse, prioritised));
+- }
+-
+- dev->oldestDirtySequence = 0;
+-
+- if (dirtiest > 0)
+- dev->nonAggressiveSkip = 4;
+-
+- return dirtiest;
+-}
+-
+-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+-{
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+-
+- int erasedOk = 0;
+-
+- /* If the block is still healthy erase it and mark as clean.
+- * If the block has had a data failure, then retire it.
+- */
+-
+- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+-
+- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+-
+- if (!bi->needsRetiring) {
+- yaffs_InvalidateCheckpoint(dev);
+- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
+- if (!erasedOk) {
+- dev->nErasureFailures++;
+- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
+- }
+- }
+-
+- if (erasedOk &&
+- ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+- int i;
+- for (i = 0; i < dev->nChunksPerBlock; i++) {
+- if (!yaffs_CheckChunkErased
+- (dev, blockNo * dev->nChunksPerBlock + i)) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- (">>Block %d erasure supposedly OK, but chunk %d not erased"
+- TENDSTR), blockNo, i));
+- }
+- }
+- }
+-
+- if (erasedOk) {
+- /* Clean it up... */
+- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+- dev->nErasedBlocks++;
+- bi->pagesInUse = 0;
+- bi->softDeletions = 0;
+- bi->hasShrinkHeader = 0;
+- bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+- bi->gcPrioritise = 0;
+- yaffs_ClearChunkBits(dev, blockNo);
+-
+- T(YAFFS_TRACE_ERASE,
+- (TSTR("Erased block %d" TENDSTR), blockNo));
+- } else {
+- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
+-
+- yaffs_RetireBlock(dev, blockNo);
+- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
+- }
+-}
+-
+-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+-{
+- int i;
+-
+- yaffs_BlockInfo *bi;
+-
+- if (dev->nErasedBlocks < 1) {
+- /* Hoosterman we've got a problem.
+- * Can't get space to gc
+- */
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+-
+- return -1;
+- }
+-
+- /* Find an empty block. */
+-
+- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+- dev->allocationBlockFinder++;
+- if (dev->allocationBlockFinder < dev->internalStartBlock
+- || dev->allocationBlockFinder > dev->internalEndBlock) {
+- dev->allocationBlockFinder = dev->internalStartBlock;
+- }
+-
+- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+-
+- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+- dev->sequenceNumber++;
+- bi->sequenceNumber = dev->sequenceNumber;
+- dev->nErasedBlocks--;
+- T(YAFFS_TRACE_ALLOCATE,
+- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
+- dev->allocationBlockFinder, dev->sequenceNumber,
+- dev->nErasedBlocks));
+- return dev->allocationBlockFinder;
+- }
+- }
+-
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR
+- ("yaffs tragedy: no more erased blocks, but there should have been %d"
+- TENDSTR), dev->nErasedBlocks));
+-
+- return -1;
+-}
+-
+-
+-
+-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+-{
+- if (!dev->nCheckpointBlocksRequired &&
+- dev->isYaffs2) {
+- /* Not a valid value so recalculate */
+- int nBytes = 0;
+- int nBlocks;
+- int devBlocks = (dev->endBlock - dev->startBlock + 1);
+- int tnodeSize;
+-
+- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- nBytes += sizeof(yaffs_CheckpointValidity);
+- nBytes += sizeof(yaffs_CheckpointDevice);
+- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+- nBytes += devBlocks * dev->chunkBitmapStride;
+- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
+- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
+- nBytes += sizeof(yaffs_CheckpointValidity);
+- nBytes += sizeof(__u32); /* checksum*/
+-
+- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+-
+- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
+-
+- dev->nCheckpointBlocksRequired = nBlocks;
+- }
+-
+- return dev->nCheckpointBlocksRequired;
+-}
+-
+-/*
+- * Check if there's space to allocate...
+- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+- */
+-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
+-{
+- int reservedChunks;
+- int reservedBlocks = dev->nReservedBlocks;
+- int checkpointBlocks;
+-
+- if (dev->isYaffs2) {
+- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
+- dev->blocksInCheckpoint;
+- if (checkpointBlocks < 0)
+- checkpointBlocks = 0;
+- } else {
+- checkpointBlocks = 0;
+- }
+-
+- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+-
+- return (dev->nFreeChunks > reservedChunks);
+-}
+-
+-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+- yaffs_BlockInfo **blockUsedPtr)
+-{
+- int retVal;
+- yaffs_BlockInfo *bi;
+-
+- if (dev->allocationBlock < 0) {
+- /* Get next block to allocate off */
+- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
+- dev->allocationPage = 0;
+- }
+-
+- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
+- /* Not enough space to allocate unless we're allowed to use the reserve. */
+- return -1;
+- }
+-
+- if (dev->nErasedBlocks < dev->nReservedBlocks
+- && dev->allocationPage == 0) {
+- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+- }
+-
+- /* Next page please.... */
+- if (dev->allocationBlock >= 0) {
+- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+-
+- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
+- dev->allocationPage;
+- bi->pagesInUse++;
+- yaffs_SetChunkBit(dev, dev->allocationBlock,
+- dev->allocationPage);
+-
+- dev->allocationPage++;
+-
+- dev->nFreeChunks--;
+-
+- /* If the block is full set the state to full */
+- if (dev->allocationPage >= dev->nChunksPerBlock) {
+- bi->blockState = YAFFS_BLOCK_STATE_FULL;
+- dev->allocationBlock = -1;
+- }
+-
+- if (blockUsedPtr)
+- *blockUsedPtr = bi;
+-
+- return retVal;
+- }
+-
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+-
+- return -1;
+-}
+-
+-static int yaffs_GetErasedChunks(yaffs_Device *dev)
+-{
+- int n;
+-
+- n = dev->nErasedBlocks * dev->nChunksPerBlock;
+-
+- if (dev->allocationBlock > 0)
+- n += (dev->nChunksPerBlock - dev->allocationPage);
+-
+- return n;
+-
+-}
+-
+-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+- int wholeBlock)
+-{
+- int oldChunk;
+- int newChunk;
+- int markNAND;
+- int retVal = YAFFS_OK;
+- int cleanups = 0;
+- int i;
+- int isCheckpointBlock;
+- int matchingChunk;
+- int maxCopies;
+-
+- int chunksBefore = yaffs_GetErasedChunks(dev);
+- int chunksAfter;
+-
+- yaffs_ExtendedTags tags;
+-
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
+-
+- yaffs_Object *object;
+-
+- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+-
+- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+-
+- T(YAFFS_TRACE_TRACING,
+- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+- block,
+- bi->pagesInUse,
+- bi->hasShrinkHeader,
+- wholeBlock));
+-
+- /*yaffs_VerifyFreeChunks(dev); */
+-
+- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+-
+- /* Take off the number of soft deleted entries because
+- * they're going to get really deleted during GC.
+- */
+- dev->nFreeChunks -= bi->softDeletions;
+-
+- dev->isDoingGC = 1;
+-
+- if (isCheckpointBlock ||
+- !yaffs_StillSomeChunkBits(dev, block)) {
+- T(YAFFS_TRACE_TRACING,
+- (TSTR
+- ("Collecting block %d that has no chunks in use" TENDSTR),
+- block));
+- yaffs_BlockBecameDirty(dev, block);
+- } else {
+-
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- yaffs_VerifyBlock(dev, bi, block);
+-
+- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
+- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
+-
+- for (/* init already done */;
+- retVal == YAFFS_OK &&
+- dev->gcChunk < dev->nChunksPerBlock &&
+- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+- maxCopies > 0;
+- dev->gcChunk++, oldChunk++) {
+- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+-
+- /* This page is in use and might need to be copied off */
+-
+- maxCopies--;
+-
+- markNAND = 1;
+-
+- yaffs_InitialiseTags(&tags);
+-
+- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+- buffer, &tags);
+-
+- object =
+- yaffs_FindObjectByNumber(dev,
+- tags.objectId);
+-
+- T(YAFFS_TRACE_GC_DETAIL,
+- (TSTR
+- ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+- dev->gcChunk, tags.objectId, tags.chunkId,
+- tags.byteCount));
+-
+- if (object && !yaffs_SkipVerification(dev)) {
+- if (tags.chunkId == 0)
+- matchingChunk = object->hdrChunk;
+- 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: %d %d %d "
+- TENDSTR), oldChunk,
+- tags.objectId, tags.chunkId, tags.byteCount));
+- }
+-
+- if (object &&
+- object->deleted &&
+- object->softDeleted &&
+- tags.chunkId != 0) {
+- /* Data chunk in a soft deleted file, throw it away
+- * It's a soft deleted data chunk,
+- * No need to copy this, just forget about it and
+- * fix up the object.
+- */
+-
+- object->nDataChunks--;
+-
+- if (object->nDataChunks <= 0) {
+- /* remeber to clean up the object */
+- dev->gcCleanupList[cleanups] =
+- tags.objectId;
+- cleanups++;
+- }
+- markNAND = 0;
+- } else if (0) {
+- /* Todo object && object->deleted && object->nDataChunks == 0 */
+- /* Deleted object header with no data chunks.
+- * Can be discarded and the file deleted.
+- */
+- object->hdrChunk = 0;
+- yaffs_FreeTnode(object->myDev,
+- object->variant.
+- fileVariant.top);
+- object->variant.fileVariant.top = NULL;
+- yaffs_DoGenericObjectDeletion(object);
+-
+- } else if (object) {
+- /* It's either a data chunk in a live file or
+- * an ObjectHeader, so we're interested in it.
+- * NB Need to keep the ObjectHeaders of deleted files
+- * until the whole file has been deleted off
+- */
+- tags.serialNumber++;
+-
+- dev->nGCCopies++;
+-
+- if (tags.chunkId == 0) {
+- /* It is an object Id,
+- * We need to nuke the shrinkheader flags first
+- * We no longer want the shrinkHeader flag since its work is done
+- * and if it is left in place it will mess up scanning.
+- */
+-
+- yaffs_ObjectHeader *oh;
+- oh = (yaffs_ObjectHeader *)buffer;
+- oh->isShrink = 0;
+- tags.extraIsShrinkHeader = 0;
+-
+- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
+- }
+-
+- newChunk =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+-
+- if (newChunk < 0) {
+- retVal = YAFFS_FAIL;
+- } else {
+-
+- /* Ok, now fix up the Tnodes etc. */
+-
+- if (tags.chunkId == 0) {
+- /* It's a header */
+- object->hdrChunk = newChunk;
+- object->serial = tags.serialNumber;
+- } else {
+- /* It's a data chunk */
+- yaffs_PutChunkIntoFile
+- (object,
+- tags.chunkId,
+- newChunk, 0);
+- }
+- }
+- }
+-
+- if (retVal == YAFFS_OK)
+- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+-
+- }
+- }
+-
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-
+-
+- /* Do any required cleanups */
+- for (i = 0; i < cleanups; i++) {
+- /* Time to delete the file too */
+- object =
+- yaffs_FindObjectByNumber(dev,
+- dev->gcCleanupList[i]);
+- if (object) {
+- yaffs_FreeTnode(dev,
+- object->variant.fileVariant.
+- top);
+- object->variant.fileVariant.top = NULL;
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: About to finally delete object %d"
+- TENDSTR), object->objectId));
+- yaffs_DoGenericObjectDeletion(object);
+- object->myDev->nDeletedFiles--;
+- }
+-
+- }
+-
+- }
+-
+- yaffs_VerifyCollectedBlock(dev, bi, block);
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
+
+- chunksAfter = yaffs_GetErasedChunks(dev);
+- if (chunksBefore >= chunksAfter) {
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("gc did not increase free chunks before %d after %d"
+- TENDSTR), chunksBefore, chunksAfter));
+- }
++ /* First check we're tall enough (ie enough topLevel) */
+
+- /* If the gc completed then clear the current gcBlock so that we find another. */
+- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+- dev->gcBlock = -1;
+- dev->gcChunk = 0;
++ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
+ }
+
+- dev->isDoingGC = 0;
+-
+- return retVal;
+-}
+
+-/* New garbage collector
+- * If we're very low on erased blocks then we do aggressive garbage collection
+- * otherwise we do "leasurely" garbage collection.
+- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
+- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+- *
+- * The idea is to help clear out space in a more spread-out manner.
+- * Dunno if it really does anything useful.
+- */
+-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+-{
+- int block;
+- int aggressive;
+- int gcOk = YAFFS_OK;
+- int maxTries = 0;
++ if (requiredTallness > fStruct->topLevel) {
++ /* Not tall enough, gotta make the tree taller */
++ for (i = fStruct->topLevel; i < requiredTallness; i++) {
+
+- int checkpointBlockAdjust;
++ tn = yaffs_GetTnode(dev);
+
+- if (dev->isDoingGC) {
+- /* Bail out so we don't get recursive gc */
+- return YAFFS_OK;
++ if (tn) {
++ tn->internal[0] = fStruct->top;
++ fStruct->top = tn;
++ fStruct->topLevel++;
++ } else {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: no more tnodes" TENDSTR)));
++ return NULL;
++ }
++ }
+ }
+
+- /* This loop should pass the first time.
+- * We'll only see looping here if the erase of the collected block fails.
+- */
+-
+- do {
+- maxTries++;
+-
+- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+- if (checkpointBlockAdjust < 0)
+- checkpointBlockAdjust = 0;
++ /* Traverse down to level 0, adding anything we need */
+
+- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
+- /* We need a block soon...*/
+- aggressive = 1;
+- } else {
+- /* We're in no hurry */
+- aggressive = 0;
+- }
++ l = fStruct->topLevel;
++ tn = fStruct->top;
+
+- if (dev->gcBlock <= 0) {
+- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+- dev->gcChunk = 0;
+- }
++ if (l > 0) {
++ while (l > 0 && tn) {
++ x = (chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK;
+
+- block = dev->gcBlock;
+
+- if (block > 0) {
+- dev->garbageCollections++;
+- if (!aggressive)
+- dev->passiveGarbageCollections++;
++ if ((l > 1) && !tn->internal[x]) {
++ /* Add missing non-level-zero tnode */
++ tn->internal[x] = yaffs_GetTnode(dev);
++ if(!tn->internal[x])
++ return NULL;
++ } else if (l == 1) {
++ /* Looking from level 1 at level 0 */
++ if (passedTn) {
++ /* If we already have one, then release it.*/
++ if (tn->internal[x])
++ yaffs_FreeTnode(dev, tn->internal[x]);
++ tn->internal[x] = passedTn;
+
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
+- dev->nErasedBlocks, aggressive));
++ } else if (!tn->internal[x]) {
++ /* Don't have one, none passed in */
++ tn->internal[x] = yaffs_GetTnode(dev);
++ if(!tn->internal[x])
++ return NULL;
++ }
++ }
+
+- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
++ tn = tn->internal[x];
++ l--;
+ }
+-
+- if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
+- TENDSTR), dev->nErasedBlocks, maxTries, block));
++ } else {
++ /* top is level 0 */
++ if (passedTn) {
++ memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
++ yaffs_FreeTnode(dev, passedTn);
+ }
+- } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
+- (block > 0) &&
+- (maxTries < 2));
++ }
+
+- return aggressive ? gcOk : YAFFS_OK;
++ return tn;
+ }
+
+-/*------------------------- TAGS --------------------------------*/
+-
+-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+- int chunkInObject)
++static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
++ yaffs_ExtendedTags *tags, int objectId,
++ int chunkInInode)
+ {
+- return (tags->chunkId == chunkInObject &&
+- tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
++ int j;
+
++ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
++ if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
++ theChunk % dev->param.nChunksPerBlock)) {
++
++ if(dev->chunkGroupSize == 1)
++ return theChunk;
++ else {
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
++ tags);
++ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
++ /* found it; */
++ return theChunk;
++ }
++ }
++ }
++ theChunk++;
++ }
++ return -1;
+ }
+
++#if 0
++/* Experimental code not being used yet. Might speed up file deletion */
++/* DeleteWorker scans backwards through the tnode tree and deletes all the
++ * chunks and tnodes in the file.
++ * Returns 1 if the tree was deleted.
++ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
++ */
+
+-/*-------------------- Data file manipulation -----------------*/
+-
+-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+- yaffs_ExtendedTags *tags)
++static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
++ int chunkOffset, int *limit)
+ {
+- /*Get the Tnode, then get the level 0 offset chunk offset */
+- yaffs_Tnode *tn;
+- int theChunk = -1;
+- yaffs_ExtendedTags localTags;
+- int retVal = -1;
+-
++ int i;
++ int chunkInInode;
++ int theChunk;
++ yaffs_ExtendedTags tags;
++ int foundChunk;
+ yaffs_Device *dev = in->myDev;
+
+- if (!tags) {
+- /* Passed a NULL, so use our own tags space */
+- tags = &localTags;
+- }
+-
+- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++ int allDone = 1;
+
+ if (tn) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++ if (level > 0) {
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ if (limit && (*limit) < 0) {
++ allDone = 0;
++ } else {
++ allDone =
++ yaffs_DeleteWorker(in,
++ tn->
++ internal
++ [i],
++ level -
++ 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i,
++ limit);
++ }
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
++ int hitLimit = 0;
+
+- retVal =
+- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+- chunkInInode);
+- }
+- return retVal;
+-}
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
++ i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
+
+-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+- yaffs_ExtendedTags *tags)
+-{
+- /* Get the Tnode, then get the level 0 offset chunk offset */
+- yaffs_Tnode *tn;
+- int theChunk = -1;
+- yaffs_ExtendedTags localTags;
++ chunkInInode = (chunkOffset <<
++ YAFFS_TNODES_LEVEL0_BITS) + i;
++
++ foundChunk =
++ yaffs_FindChunkInGroup(dev,
++ theChunk,
++ &tags,
++ in->objectId,
++ chunkInInode);
++
++ if (foundChunk > 0) {
++ yaffs_DeleteChunk(dev,
++ foundChunk, 1,
++ __LINE__);
++ in->nDataChunks--;
++ if (limit) {
++ *limit = *limit - 1;
++ if (*limit <= 0)
++ hitLimit = 1;
++ }
+
+- yaffs_Device *dev = in->myDev;
+- int retVal = -1;
++ }
++
++ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
++ }
++
++ }
++ return (i < 0) ? 1 : 0;
++
++ }
+
+- if (!tags) {
+- /* Passed a NULL, so use our own tags space */
+- tags = &localTags;
+ }
+
+- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++ return 1;
+
+- if (tn) {
++}
+
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++#endif
+
+- retVal =
+- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+- chunkInInode);
++static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
++{
++ yaffs_BlockInfo *theBlock;
++ unsigned blockNo;
+
+- /* Delete the entry in the filestructure (if found) */
+- if (retVal != -1)
+- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
+- }
++ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+
+- return retVal;
++ blockNo = chunk / dev->param.nChunksPerBlock;
++ theBlock = yaffs_GetBlockInfo(dev, blockNo);
++ if (theBlock) {
++ theBlock->softDeletions++;
++ dev->nFreeChunks++;
++ yaffs2_UpdateOldestDirtySequence(dev, blockNo, theBlock);
++ }
+ }
+
+-#ifdef YAFFS_PARANOID
++/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
++ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
++ * of the tnode.
++ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
++ */
+
+-static int yaffs_CheckFileSanity(yaffs_Object *in)
++static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
+ {
+- int chunk;
+- int nChunks;
+- int fSize;
+- int failed = 0;
+- int objId;
+- yaffs_Tnode *tn;
+- yaffs_Tags localTags;
+- yaffs_Tags *tags = &localTags;
++ int i;
+ int theChunk;
+- int chunkDeleted;
++ int allDone = 1;
++ yaffs_Device *dev = in->myDev;
+
+- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+- return YAFFS_FAIL;
++ if (tn) {
++ if (level > 0) {
+
+- objId = in->objectId;
+- fSize = in->variant.fileVariant.fileSize;
+- nChunks =
+- (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
+-
+- for (chunk = 1; chunk <= nChunks; chunk++) {
+- tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
+- chunk);
+-
+- if (tn) {
+-
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+-
+- if (yaffs_CheckChunkBits
+- (dev, theChunk / dev->nChunksPerBlock,
+- theChunk % dev->nChunksPerBlock)) {
+-
+- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
+- tags,
+- &chunkDeleted);
+- if (yaffs_TagsMatch
+- (tags, in->objectId, chunk, chunkDeleted)) {
+- /* found it; */
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ allDone =
++ yaffs_SoftDeleteWorker(in,
++ tn->
++ internal[i],
++ level - 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i);
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ } else {
++ /* Hoosterman... how could this happen? */
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
+
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
++ /* Note this does not find the real chunk, only the chunk group.
++ * We make an assumption that a chunk group is not larger than
++ * a block.
++ */
++ yaffs_SoftDeleteChunk(dev, theChunk);
++ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
+ }
+- } else {
+
+- failed = 1;
+ }
++ return 1;
+
+- } else {
+- /* T(("No level 0 found for %d\n", chunk)); */
+ }
++
+ }
+
+- return failed ? YAFFS_FAIL : YAFFS_OK;
++ return 1;
++
+ }
+
+-#endif
++static void yaffs_SoftDeleteFile(yaffs_Object *obj)
++{
++ if (obj->deleted &&
++ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
++ if (obj->nDataChunks <= 0) {
++ /* Empty file with no duplicate object headers, just delete it immediately */
++ yaffs_FreeTnode(obj->myDev,
++ obj->variant.fileVariant.top);
++ obj->variant.fileVariant.top = NULL;
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
++ obj->objectId));
++ yaffs_DoGenericObjectDeletion(obj);
++ } else {
++ yaffs_SoftDeleteWorker(obj,
++ obj->variant.fileVariant.top,
++ obj->variant.fileVariant.
++ topLevel, 0);
++ obj->softDeleted = 1;
++ }
++ }
++}
+
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+- int chunkInNAND, int inScan)
++/* Pruning removes any part of the file structure tree that is beyond the
++ * bounds of the file (ie that does not point to chunks).
++ *
++ * A file should only get pruned when its size is reduced.
++ *
++ * Before pruning, the chunks must be pulled from the tree and the
++ * level 0 tnode entries must be zeroed out.
++ * Could also use this for file deletion, but that's probably better handled
++ * by a special case.
++ *
++ * This function is recursive. For levels > 0 the function is called again on
++ * any sub-tree. For level == 0 we just check if the sub-tree has data.
++ * If there is no data in a subtree then it is pruned.
++ */
++
++static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
++ __u32 level, int del0)
+ {
+- /* NB inScan is zero unless scanning.
+- * For forward scanning, inScan is > 0;
+- * for backward scanning inScan is < 0
+- */
++ int i;
++ int hasData;
+
+- yaffs_Tnode *tn;
+- yaffs_Device *dev = in->myDev;
+- int existingChunk;
+- yaffs_ExtendedTags existingTags;
+- yaffs_ExtendedTags newTags;
+- unsigned existingSerial, newSerial;
++ if (tn) {
++ hasData = 0;
+
+- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
+- /* Just ignore an attempt at putting a chunk into a non-file during scanning
+- * If it is not during Scanning then something went wrong!
+- */
+- if (!inScan) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy:attempt to put data chunk into a non-file"
+- TENDSTR)));
+- YBUG();
+- }
++ if(level > 0){
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i]) {
++ tn->internal[i] =
++ yaffs_PruneWorker(dev, tn->internal[i],
++ level - 1,
++ (i == 0) ? del0 : 1);
++ }
+
+- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+- return YAFFS_OK;
+- }
++ if (tn->internal[i])
++ hasData++;
++ }
++ } else {
++ int tnodeSize_u32 = dev->tnodeSize/sizeof(__u32);
++ __u32 *map = (__u32 *)tn;
+
+- tn = yaffs_AddOrFindLevel0Tnode(dev,
+- &in->variant.fileVariant,
+- chunkInInode,
+- NULL);
+- if (!tn)
+- return YAFFS_FAIL;
++ for(i = 0; !hasData && i < tnodeSize_u32; i++){
++ if(map[i])
++ hasData++;
++ }
++ }
+
+- existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++ if (hasData == 0 && del0) {
++ /* Free and return NULL */
+
+- if (inScan != 0) {
+- /* If we're scanning then we need to test for duplicates
+- * NB This does not need to be efficient since it should only ever
+- * happen when the power fails during a write, then only one
+- * chunk should ever be affected.
+- *
+- * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+- * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+- */
++ yaffs_FreeTnode(dev, tn);
++ tn = NULL;
++ }
+
+- if (existingChunk > 0) {
+- /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
+- * thus we have to do a FindChunkInFile to get the real chunk id.
+- *
+- * We have a duplicate now we need to decide which one to use:
+- *
+- * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+- * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+- * YAFFS1: Get both sets of tags and compare serial numbers.
+- */
++ }
+
+- if (inScan > 0) {
+- /* Only do this for forward scanning */
+- yaffs_ReadChunkWithTagsFromNAND(dev,
+- chunkInNAND,
+- NULL, &newTags);
++ return tn;
+
+- /* Do a proper find */
+- existingChunk =
+- yaffs_FindChunkInFile(in, chunkInInode,
+- &existingTags);
+- }
++}
+
+- if (existingChunk <= 0) {
+- /*Hoosterman - how did this happen? */
++static int yaffs_PruneFileStructure(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct)
++{
++ int i;
++ int hasData;
++ int done = 0;
++ yaffs_Tnode *tn;
+
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy: existing chunk < 0 in scan"
+- TENDSTR)));
++ if (fStruct->topLevel > 0) {
++ fStruct->top =
++ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+
+- }
++ /* Now we have a tree with all the non-zero branches NULL but the height
++ * is the same as it was.
++ * Let's see if we can trim internal tnodes to shorten the tree.
++ * We can do this if only the 0th element in the tnode is in use
++ * (ie all the non-zero are NULL)
++ */
+
+- /* NB The deleted flags should be false, otherwise the chunks will
+- * not be loaded during a scan
+- */
++ while (fStruct->topLevel && !done) {
++ tn = fStruct->top;
+
+- if (inScan > 0) {
+- newSerial = newTags.serialNumber;
+- existingSerial = existingTags.serialNumber;
++ hasData = 0;
++ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i])
++ hasData++;
+ }
+-
+- if ((inScan > 0) &&
+- (in->myDev->isYaffs2 ||
+- existingChunk <= 0 ||
+- ((existingSerial + 1) & 3) == newSerial)) {
+- /* Forward scanning.
+- * Use new
+- * Delete the old one and drop through to update the tnode
+- */
+- yaffs_DeleteChunk(dev, existingChunk, 1,
+- __LINE__);
+- } else {
+- /* Backward scanning or we want to use the existing one
+- * Use existing.
+- * Delete the new one and return early so that the tnode isn't changed
+- */
+- yaffs_DeleteChunk(dev, chunkInNAND, 1,
+- __LINE__);
+- return YAFFS_OK;
++
++ if (!hasData) {
++ fStruct->top = tn->internal[0];
++ fStruct->topLevel--;
++ yaffs_FreeTnode(dev, tn);
++ } else {
++ done = 1;
+ }
+ }
+-
+ }
+
+- if (existingChunk == 0)
+- in->nDataChunks++;
+-
+- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
+-
+ return YAFFS_OK;
+ }
+
+-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+- __u8 *buffer)
+-{
+- int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+-
+- if (chunkInNAND >= 0)
+- return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
+- buffer, NULL);
+- else {
+- T(YAFFS_TRACE_NANDACCESS,
+- (TSTR("Chunk %d not found zero instead" TENDSTR),
+- chunkInNAND));
+- /* get sane (zero) data if you read a hole */
+- memset(buffer, 0, in->myDev->nDataBytesPerChunk);
+- return 0;
+- }
++/*-------------------- End of File Structure functions.-------------------*/
+
+-}
+
+-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
++/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
++static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+ {
+- int block;
+- int page;
+- yaffs_ExtendedTags tags;
+- yaffs_BlockInfo *bi;
++ yaffs_Object *obj = yaffs_AllocateRawObject(dev);
+
+- if (chunkId <= 0)
+- return;
++ if (obj) {
++ dev->nObjects++;
+
+- dev->nDeletions++;
+- block = chunkId / dev->nChunksPerBlock;
+- page = chunkId % dev->nChunksPerBlock;
++ /* Now sweeten it up... */
+
++ memset(obj, 0, sizeof(yaffs_Object));
++ obj->beingCreated = 1;
+
+- if (!yaffs_CheckChunkBit(dev, block, page))
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Deleting invalid chunk %d"TENDSTR),
+- chunkId));
++ obj->myDev = dev;
++ obj->hdrChunk = 0;
++ obj->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
++ YINIT_LIST_HEAD(&(obj->hardLinks));
++ YINIT_LIST_HEAD(&(obj->hashLink));
++ YINIT_LIST_HEAD(&obj->siblings);
+
+- bi = yaffs_GetBlockInfo(dev, block);
+
+- T(YAFFS_TRACE_DELETION,
+- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
++ /* Now make the directory sane */
++ if (dev->rootDir) {
++ obj->parent = dev->rootDir;
++ ylist_add(&(obj->siblings), &dev->rootDir->variant.directoryVariant.children);
++ }
+
+- if (markNAND &&
+- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
++ /* Add it to the lost and found directory.
++ * NB Can't put root or lostNFound in lostNFound so
++ * check if lostNFound exists first
++ */
++ if (dev->lostNFoundDir)
++ yaffs_AddObjectToDirectory(dev->lostNFoundDir, obj);
+
+- yaffs_InitialiseTags(&tags);
++ obj->beingCreated = 0;
++ }
+
+- tags.chunkDeleted = 1;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
+- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+- yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+- } else {
+- dev->nUnmarkedDeletions++;
+- }
++ return obj;
++}
+
+- /* Pull out of the management area.
+- * If the whole block became dirty, this will kick off an erasure.
+- */
+- if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+- bi->blockState == YAFFS_BLOCK_STATE_FULL ||
+- bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+- bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+- dev->nFreeChunks++;
++static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
++ __u32 mode)
++{
+
+- yaffs_ClearChunkBit(dev, block, page);
++ yaffs_Object *obj =
++ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
++ if (obj) {
++ obj->fake = 1; /* it is fake so it might have no NAND presence... */
++ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
++ obj->unlinkAllowed = 0; /* ... or unlink it */
++ obj->deleted = 0;
++ obj->unlinked = 0;
++ obj->yst_mode = mode;
++ obj->myDev = dev;
++ obj->hdrChunk = 0; /* Not a valid chunk. */
++ }
+
+- bi->pagesInUse--;
++ return obj;
+
+- if (bi->pagesInUse == 0 &&
+- !bi->hasShrinkHeader &&
+- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
+- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+- yaffs_BlockBecameDirty(dev, block);
+- }
++}
+
+- }
++static void yaffs_UnhashObject(yaffs_Object *obj)
++{
++ int bucket;
++ yaffs_Device *dev = obj->myDev;
+
++ /* If it is still linked into the bucket list, free from the list */
++ if (!ylist_empty(&obj->hashLink)) {
++ ylist_del_init(&obj->hashLink);
++ bucket = yaffs_HashFunction(obj->objectId);
++ dev->objectBucket[bucket].count--;
++ }
+ }
+
+-static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+- const __u8 *buffer, int nBytes,
+- int useReserve)
++/* FreeObject frees up a Object and puts it back on the free list */
++static void yaffs_FreeObject(yaffs_Object *obj)
+ {
+- /* Find old chunk Need to do this to get serial number
+- * Write new one and patch into tree.
+- * Invalidate old tags.
+- */
++ yaffs_Device *dev = obj->myDev;
+
+- int prevChunkId;
+- yaffs_ExtendedTags prevTags;
++ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->myInode));
+
+- int newChunkId;
+- yaffs_ExtendedTags newTags;
++ if (!obj)
++ YBUG();
++ if (obj->parent)
++ YBUG();
++ if (!ylist_empty(&obj->siblings))
++ YBUG();
+
+- yaffs_Device *dev = in->myDev;
+
+- yaffs_CheckGarbageCollection(dev);
++ if (obj->myInode) {
++ /* We're still hooked up to a cached inode.
++ * Don't delete now, but mark for later deletion
++ */
++ obj->deferedFree = 1;
++ return;
++ }
++
++ yaffs_UnhashObject(obj);
+
+- /* Get the previous chunk at this location in the file if it exists */
+- prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
++ yaffs_FreeRawObject(dev,obj);
++ dev->nObjects--;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
+
+- /* Set up new tags */
+- yaffs_InitialiseTags(&newTags);
+
+- newTags.chunkId = chunkInInode;
+- newTags.objectId = in->objectId;
+- newTags.serialNumber =
+- (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
+- newTags.byteCount = nBytes;
++void yaffs_HandleDeferedFree(yaffs_Object *obj)
++{
++ if (obj->deferedFree)
++ yaffs_FreeObject(obj);
++}
+
+- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+- YBUG();
++static void yaffs_InitialiseTnodesAndObjects(yaffs_Device *dev)
++{
++ int i;
++
++ dev->nObjects = 0;
++ dev->nTnodes = 0;
++
++ yaffs_InitialiseRawTnodesAndObjects(dev);
++
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
++ dev->objectBucket[i].count = 0;
+ }
++}
+
+- newChunkId =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+- useReserve);
++static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
++{
++ int i;
++ int l = 999;
++ int lowest = 999999;
+
+- if (newChunkId >= 0) {
+- yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
+
+- if (prevChunkId >= 0)
+- yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
++ /* Search for the shortest list or one that
++ * isn't too long.
++ */
++
++ for (i = 0; i < 10 && lowest > 4; i++) {
++ dev->bucketFinder++;
++ dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS;
++ if (dev->objectBucket[dev->bucketFinder].count < lowest) {
++ lowest = dev->objectBucket[dev->bucketFinder].count;
++ l = dev->bucketFinder;
++ }
+
+- yaffs_CheckFileSanity(in);
+ }
+- return newChunkId;
+
++ return l;
+ }
+
+-/* UpdateObjectHeader updates the header on NAND for an object.
+- * If name is not NULL, then that new name is used.
+- */
+-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
+- int isShrink, int shadows)
++static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+ {
++ int bucket = yaffs_FindNiceObjectBucket(dev);
+
+- yaffs_BlockInfo *bi;
++ /* Now find an object value that has not already been taken
++ * by scanning the list.
++ */
+
+- yaffs_Device *dev = in->myDev;
++ int found = 0;
++ struct ylist_head *i;
+
+- int prevChunkId;
+- int retVal = 0;
+- int result = 0;
++ __u32 n = (__u32) bucket;
+
+- int newChunkId;
+- yaffs_ExtendedTags newTags;
+- yaffs_ExtendedTags oldTags;
++ /* yaffs_CheckObjectHashSanity(); */
+
+- __u8 *buffer = NULL;
+- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
++ while (!found) {
++ found = 1;
++ n += YAFFS_NOBJECT_BUCKETS;
++ if (1 || dev->objectBucket[bucket].count > 0) {
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* If there is already one in the list */
++ if (i && ylist_entry(i, yaffs_Object,
++ hashLink)->objectId == n) {
++ found = 0;
++ }
++ }
++ }
++ }
+
+- yaffs_ObjectHeader *oh = NULL;
++ return n;
++}
+
+- yaffs_strcpy(oldName, _Y("silly old name"));
++static void yaffs_HashObject(yaffs_Object *in)
++{
++ int bucket = yaffs_HashFunction(in->objectId);
++ yaffs_Device *dev = in->myDev;
+
++ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
++ dev->objectBucket[bucket].count++;
++}
+
+- if (!in->fake ||
+- in == dev->rootDir || /* The rootDir should also be saved */
+- force) {
++yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
++{
++ int bucket = yaffs_HashFunction(number);
++ struct ylist_head *i;
++ yaffs_Object *in;
+
+- yaffs_CheckGarbageCollection(dev);
+- yaffs_CheckObjectDetailsLoaded(in);
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* Look if it is in the list */
++ if (i) {
++ in = ylist_entry(i, yaffs_Object, hashLink);
++ if (in->objectId == number) {
+
+- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+- oh = (yaffs_ObjectHeader *) buffer;
++ /* Don't tell the VFS about this one if it is defered free */
++ if (in->deferedFree)
++ return NULL;
+
+- prevChunkId = in->hdrChunk;
++ return in;
++ }
++ }
++ }
+
+- if (prevChunkId > 0) {
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
+- buffer, &oldTags);
++ return NULL;
++}
+
+- yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
++yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject=NULL;
++ yaffs_Tnode *tn = NULL;
++
++ if (number < 0)
++ number = yaffs_CreateNewObjectNumber(dev);
+
+- memcpy(oldName, oh->name, sizeof(oh->name));
+- }
++ if (type == YAFFS_OBJECT_TYPE_FILE) {
++ tn = yaffs_GetTnode(dev);
++ if (!tn)
++ return NULL;
++ }
+
+- memset(buffer, 0xFF, dev->nDataBytesPerChunk);
++ theObject = yaffs_AllocateEmptyObject(dev);
++ if (!theObject){
++ if(tn)
++ yaffs_FreeTnode(dev,tn);
++ return NULL;
++ }
+
+- oh->type = in->variantType;
+- oh->yst_mode = in->yst_mode;
+- oh->shadowsObject = oh->inbandShadowsObject = shadows;
+
++ if (theObject) {
++ theObject->fake = 0;
++ theObject->renameAllowed = 1;
++ theObject->unlinkAllowed = 1;
++ theObject->objectId = number;
++ yaffs_HashObject(theObject);
++ theObject->variantType = type;
+ #ifdef CONFIG_YAFFS_WINCE
+- oh->win_atime[0] = in->win_atime[0];
+- oh->win_ctime[0] = in->win_ctime[0];
+- oh->win_mtime[0] = in->win_mtime[0];
+- oh->win_atime[1] = in->win_atime[1];
+- oh->win_ctime[1] = in->win_ctime[1];
+- oh->win_mtime[1] = in->win_mtime[1];
+-#else
+- oh->yst_uid = in->yst_uid;
+- oh->yst_gid = in->yst_gid;
+- oh->yst_atime = in->yst_atime;
+- oh->yst_mtime = in->yst_mtime;
+- oh->yst_ctime = in->yst_ctime;
+- oh->yst_rdev = in->yst_rdev;
+-#endif
+- if (in->parent)
+- oh->parentObjectId = in->parent->objectId;
+- else
+- oh->parentObjectId = 0;
+-
+- if (name && *name) {
+- memset(oh->name, 0, sizeof(oh->name));
+- yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
+- } else if (prevChunkId >= 0)
+- memcpy(oh->name, oldName, sizeof(oh->name));
+- else
+- memset(oh->name, 0, sizeof(oh->name));
++ yfsd_WinFileTimeNow(theObject->win_atime);
++ theObject->win_ctime[0] = theObject->win_mtime[0] =
++ theObject->win_atime[0];
++ theObject->win_ctime[1] = theObject->win_mtime[1] =
++ theObject->win_atime[1];
+
+- oh->isShrink = isShrink;
++#else
+
+- switch (in->variantType) {
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* Should not happen */
+- break;
++ theObject->yst_atime = theObject->yst_mtime =
++ theObject->yst_ctime = Y_CURRENT_TIME;
++#endif
++ switch (type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+- oh->fileSize =
+- (oh->parentObjectId == YAFFS_OBJECTID_DELETED
+- || oh->parentObjectId ==
+- YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
+- fileVariant.fileSize;
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- oh->equivalentObjectId =
+- in->variant.hardLinkVariant.equivalentObjectId;
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* Do nothing */
++ theObject->variant.fileVariant.fileSize = 0;
++ theObject->variant.fileVariant.scannedFileSize = 0;
++ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
++ theObject->variant.fileVariant.topLevel = 0;
++ theObject->variant.fileVariant.top = tn;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+- /* Do nothing */
++ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
++ children);
++ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
++ dirty);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+- yaffs_strncpy(oh->alias,
+- in->variant.symLinkVariant.alias,
+- YAFFS_MAX_ALIAS_LENGTH);
+- oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* No action required */
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* todo this should not happen */
+ break;
+ }
++ }
+
+- /* Tags */
+- yaffs_InitialiseTags(&newTags);
+- in->serial++;
+- newTags.chunkId = 0;
+- newTags.objectId = in->objectId;
+- newTags.serialNumber = in->serial;
+-
+- /* Add extra info for file header */
+-
+- newTags.extraHeaderInfoAvailable = 1;
+- newTags.extraParentObjectId = oh->parentObjectId;
+- newTags.extraFileLength = oh->fileSize;
+- newTags.extraIsShrinkHeader = oh->isShrink;
+- newTags.extraEquivalentObjectId = oh->equivalentObjectId;
+- newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+- newTags.extraObjectType = in->variantType;
+-
+- yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
++ return theObject;
++}
+
+- /* Create new chunk in NAND */
+- newChunkId =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+- (prevChunkId >= 0) ? 1 : 0);
++yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
++ int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject = NULL;
+
+- if (newChunkId >= 0) {
++ if (number > 0)
++ theObject = yaffs_FindObjectByNumber(dev, number);
+
+- in->hdrChunk = newChunkId;
++ if (!theObject)
++ theObject = yaffs_CreateNewObject(dev, number, type);
+
+- if (prevChunkId >= 0) {
+- yaffs_DeleteChunk(dev, prevChunkId, 1,
+- __LINE__);
+- }
++ return theObject;
+
+- if (!yaffs_ObjectHasCachedWriteData(in))
+- in->dirty = 0;
++}
+
+- /* If this was a shrink, then mark the block that the chunk lives on */
+- if (isShrink) {
+- bi = yaffs_GetBlockInfo(in->myDev,
+- newChunkId / in->myDev->nChunksPerBlock);
+- bi->hasShrinkHeader = 1;
+- }
+
+- }
++YCHAR *yaffs_CloneString(const YCHAR *str)
++{
++ YCHAR *newStr = NULL;
++ int len;
+
+- retVal = newChunkId;
++ if (!str)
++ str = _Y("");
+
++ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
++ newStr = YMALLOC((len + 1) * sizeof(YCHAR));
++ if (newStr){
++ yaffs
projects / openwrt / svn-archive / archive.git / commitdiff