+++ /dev/null
---- a/fs/yaffs2/devextras.h
-+++ b/fs/yaffs2/devextras.h
-@@ -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__)
-
---- a/fs/yaffs2/Kconfig
-+++ b/fs/yaffs2/Kconfig
-@@ -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.
-+
-+
---- a/fs/yaffs2/Makefile
-+++ b/fs/yaffs2/Makefile
-@@ -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
-+
---- a/fs/yaffs2/moduleconfig.h
-+++ b/fs/yaffs2/moduleconfig.h
-@@ -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
---- /dev/null
-+++ b/fs/yaffs2/yaffs_allocator.c
-@@ -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
---- /dev/null
-+++ b/fs/yaffs2/yaffs_allocator.h
-@@ -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
---- /dev/null
-+++ b/fs/yaffs2/yaffs_bitmap.c
-@@ -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;
-+}
-+
---- /dev/null
-+++ b/fs/yaffs2/yaffs_bitmap.h
-@@ -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
---- a/fs/yaffs2/yaffs_checkptrw.c
-+++ b/fs/yaffs2/yaffs_checkptrw.c
-@@ -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);
- }
-
-
---- a/fs/yaffs2/yaffs_checkptrw.h
-+++ b/fs/yaffs2/yaffs_checkptrw.h
-@@ -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
--
---- a/fs/yaffs2/yaffs_ecc.c
-+++ b/fs/yaffs2/yaffs_ecc.c
-@@ -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 $";
--
- #include "yportenv.h"
-
- #include "yaffs_ecc.h"
---- a/fs/yaffs2/yaffs_ecc.h
-+++ b/fs/yaffs2/yaffs_ecc.h
-@@ -1,7 +1,7 @@
- /*
- * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
- *
-- * Copyright (C) 2002-2007 Aleph One Ltd.
-+ * Copyright (C) 2002-2010 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
---- a/fs/yaffs2/yaffs_fs.c
-+++ /dev/null
-@@ -1,2529 +0,0 @@
--/*
-- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
-- *
-- * Copyright (C) 2002-2009 Aleph One Ltd.
-- * for Toby Churchill Ltd and Brightstar Engineering
-- *
-- * Created by Charles Manning <charles@aleph1.co.uk>
-- * Acknowledgements:
-- * Luc van OostenRyck for numerous patches.
-- * Nick Bane for numerous patches.
-- * Nick Bane for 2.5/2.6 integration.
-- * Andras Toth for mknod rdev issue.
-- * Michael Fischer for finding the problem with inode inconsistency.
-- * Some code bodily lifted from JFFS
-- *
-- * This program is free software; you can redistribute it and/or modify
-- * it under the terms of the GNU General Public License version 2 as
-- * published by the Free Software Foundation.
-- */
--
--/*
-- *
-- * This is the file system front-end to YAFFS that hooks it up to
-- * the VFS.
-- *
-- * Special notes:
-- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
-- * this superblock
-- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
-- * superblock
-- * >> inode->u.generic_ip points to the associated yaffs_Object.
-- */
--
--const char *yaffs_fs_c_version =
-- "$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");
---- a/fs/yaffs2/yaffs_getblockinfo.h
-+++ b/fs/yaffs2/yaffs_getblockinfo.h
-@@ -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)
---- a/fs/yaffs2/yaffs_guts.c
-+++ b/fs/yaffs2/yaffs_guts.c
-@@ -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_strncpy(newStr, str,len);
-+ newStr[len] = 0;
- }
-+ return newStr;
-
-- if (buffer)
-- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
--
-- return retVal;
- }
-
--/*------------------------ Short Operations Cache ----------------------------------------
-- * In many situations where there is no high level buffering (eg WinCE) a lot of
-- * reads might be short sequential reads, and a lot of writes may be short
-- * sequential writes. eg. scanning/writing a jpeg file.
-- * In these cases, a short read/write cache can provide a huge perfomance benefit
-- * with dumb-as-a-rock code.
-- * In Linux, the page cache provides read buffering aand the short op cache provides write
-- * buffering.
-- *
-- * There are a limited number (~10) of cache chunks per device so that we don't
-- * need a very intelligent search.
-+/*
-+ * Mknod (create) a new object.
-+ * equivalentObject only has meaning for a hard link;
-+ * aliasString only has meaning for a symlink.
-+ * rdev only has meaning for devices (a subset of special objects)
- */
-
--static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
-+static yaffs_Object *yaffs_MknodObject(yaffs_Object
projects / openwrt / svn-archive / archive.git / commitdiff