--- /dev/null
+diff --git a/fs/Kconfig b/fs/Kconfig
+index f9b5842..556f12a 100644
+--- a/fs/Kconfig
++++ b/fs/Kconfig
+@@ -1022,6 +1022,15 @@ config EFS_FS
+ To compile the EFS file system support as a module, choose M here: the
+ module will be called efs.
+
++config YAFFS_FS
++ tristate "Yet Another Flash File System (YAFFS) support"
++ depends on MTD
++ help
++ JFFS is the Journaling Flash File System developed by Axis
++ Communications in Sweden, aimed at providing a crash/powerdown-safe
++ file system for disk-less embedded devices. Further information is
++ available at (<http://developer.axis.com/software/jffs/>).
++
+ config JFFS_FS
+ tristate "Journalling Flash File System (JFFS) support"
+ depends on MTD
+diff --git a/fs/Makefile b/fs/Makefile
+index 078d3d1..2062d2f 100644
+--- a/fs/Makefile
++++ b/fs/Makefile
+@@ -84,6 +85,7 @@ obj-$(CONFIG_UFS_FS) += ufs/
+ obj-$(CONFIG_EFS_FS) += efs/
+ obj-$(CONFIG_JFFS_FS) += jffs/
+ obj-$(CONFIG_JFFS2_FS) += jffs2/
++obj-$(CONFIG_YAFFS_FS) += yaffs/
+ obj-$(CONFIG_AFFS_FS) += affs/
+ obj-$(CONFIG_ROMFS_FS) += romfs/
+ obj-$(CONFIG_QNX4FS_FS) += qnx4/
+diff --git a/fs/yaffs/Makefile b/fs/yaffs/Makefile
+new file mode 100644
+index 0000000..615c2b2
+--- /dev/null
++++ b/fs/yaffs/Makefile
+@@ -0,0 +1,18 @@
++#
++# Makefile for the Linux msdos filesystem routines.
++#
++# Note! Dependencies are done automagically by 'make dep', which also
++# removes any old dependencies. DON'T put your own dependencies here
++# unless it's something special (ie not a .c file).
++#
++# Note 2! The CFLAGS definitions are now in the main makefile.
++
++
++EXTRA_CFLAGS += -DCONFIG_YAFFS_YAFFS1 -DCONFIG_YAFFS_YAFFS2
++
++
++obj-$(CONFIG_YAFFS_FS) += yaffs.o
++
++yaffs-y = yaffs_fs.o yaffs_guts.o yaffs_mtdif.o yaffs_tagscompat.o \
++ yaffs_packedtags2.o yaffs_mtdif2.o yaffs_tagsvalidity.o \
++ yaffs_ecc.o
+diff --git a/fs/yaffs/devextras.h b/fs/yaffs/devextras.h
+new file mode 100644
+index 0000000..752c2cc
+--- /dev/null
++++ b/fs/yaffs/devextras.h
+@@ -0,0 +1,271 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * devextras.h
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * This file is just holds extra declarations used during development.
++ * Most of these are from kernel includes placed here so we can use them in
++ * applications.
++ *
++ * $Id: devextras.h,v 1.1 2004/11/03 08:14:07 charles Exp $
++ *
++ */
++
++#ifndef __EXTRAS_H__
++#define __EXTRAS_H__
++
++#if defined WIN32
++#define __inline__ __inline
++#define new newHack
++#endif
++
++#if !(defined __KERNEL__) || (defined WIN32)
++
++// User space defines
++
++typedef unsigned char __u8;
++typedef unsigned short __u16;
++typedef unsigned __u32;
++
++
++/*
++ * Simple doubly linked list implementation.
++ *
++ * Some of the internal functions ("__xxx") are useful when
++ * manipulating whole lists rather than single entries, as
++ * sometimes we already know the next/prev entries and we can
++ * generate better code by using them directly rather than
++ * using the generic single-entry routines.
++ */
++
++ #define prefetch(x) 1
++
++
++struct list_head {
++ struct list_head *next, *prev;
++};
++
++#define LIST_HEAD_INIT(name) { &(name), &(name) }
++
++#define LIST_HEAD(name) \
++ struct list_head name = LIST_HEAD_INIT(name)
++
++#define INIT_LIST_HEAD(ptr) do { \
++ (ptr)->next = (ptr); (ptr)->prev = (ptr); \
++} while (0)
++
++/*
++ * Insert a new entry between two known consecutive entries.
++ *
++ * This is only for internal list manipulation where we know
++ * the prev/next entries already!
++ */
++static __inline__ void __list_add(struct list_head * new,
++ struct list_head * prev,
++ struct list_head * next)
++{
++ next->prev = new;
++ new->next = next;
++ new->prev = prev;
++ prev->next = new;
++}
++
++/**
++ * list_add - add a new entry
++ * @new: new entry to be added
++ * @head: list head to add it after
++ *
++ * Insert a new entry after the specified head.
++ * This is good for implementing stacks.
++ */
++static __inline__ void list_add(struct list_head *new, struct list_head *head)
++{
++ __list_add(new, head, head->next);
++}
++
++/**
++ * list_add_tail - add a new entry
++ * @new: new entry to be added
++ * @head: list head to add it before
++ *
++ * Insert a new entry before the specified head.
++ * This is useful for implementing queues.
++ */
++static __inline__ void list_add_tail(struct list_head *new, struct list_head *head)
++{
++ __list_add(new, head->prev, head);
++}
++
++/*
++ * Delete a list entry by making the prev/next entries
++ * point to each other.
++ *
++ * This is only for internal list manipulation where we know
++ * the prev/next entries already!
++ */
++static __inline__ void __list_del(struct list_head * prev,
++ struct list_head * next)
++{
++ next->prev = prev;
++ prev->next = next;
++}
++
++/**
++ * list_del - deletes entry from list.
++ * @entry: the element to delete from the list.
++ * Note: list_empty on entry does not return true after this, the entry is in an undefined state.
++ */
++static __inline__ void list_del(struct list_head *entry)
++{
++ __list_del(entry->prev, entry->next);
++}
++
++/**
++ * list_del_init - deletes entry from list and reinitialize it.
++ * @entry: the element to delete from the list.
++ */
++static __inline__ void list_del_init(struct list_head *entry)
++{
++ __list_del(entry->prev, entry->next);
++ INIT_LIST_HEAD(entry);
++}
++
++/**
++ * list_empty - tests whether a list is empty
++ * @head: the list to test.
++ */
++static __inline__ int list_empty(struct list_head *head)
++{
++ return head->next == head;
++}
++
++/**
++ * list_splice - join two lists
++ * @list: the new list to add.
++ * @head: the place to add it in the first list.
++ */
++static __inline__ void list_splice(struct list_head *list, struct list_head *head)
++{
++ struct list_head *first = list->next;
++
++ if (first != list) {
++ struct list_head *last = list->prev;
++ struct list_head *at = head->next;
++
++ first->prev = head;
++ head->next = first;
++
++ last->next = at;
++ at->prev = last;
++ }
++}
++
++/**
++ * list_entry - get the struct for this entry
++ * @ptr: the &struct list_head pointer.
++ * @type: the type of the struct this is embedded in.
++ * @member: the name of the list_struct within the struct.
++ */
++#define list_entry(ptr, type, member) \
++ ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
++
++/**
++ * list_for_each - iterate over a list
++ * @pos: the &struct list_head to use as a loop counter.
++ * @head: the head for your list.
++ */
++#define list_for_each(pos, head) \
++ for (pos = (head)->next, prefetch(pos->next); pos != (head); \
++ pos = pos->next, prefetch(pos->next))
++
++/**
++ * list_for_each_safe - iterate over a list safe against removal of list entry
++ * @pos: the &struct list_head to use as a loop counter.
++ * @n: another &struct list_head to use as temporary storage
++ * @head: the head for your list.
++ */
++#define list_for_each_safe(pos, n, head) \
++ for (pos = (head)->next, n = pos->next; pos != (head); \
++ pos = n, n = pos->next)
++
++
++
++
++/*
++ * File types
++ */
++#define DT_UNKNOWN 0
++#define DT_FIFO 1
++#define DT_CHR 2
++#define DT_DIR 4
++#define DT_BLK 6
++#define DT_REG 8
++#define DT_LNK 10
++#define DT_SOCK 12
++#define DT_WHT 14
++
++#ifndef WIN32
++#include <sys/stat.h>
++#endif
++
++/*
++ * Attribute flags. These should be or-ed together to figure out what
++ * has been changed!
++ */
++#define ATTR_MODE 1
++#define ATTR_UID 2
++#define ATTR_GID 4
++#define ATTR_SIZE 8
++#define ATTR_ATIME 16
++#define ATTR_MTIME 32
++#define ATTR_CTIME 64
++#define ATTR_ATIME_SET 128
++#define ATTR_MTIME_SET 256
++#define ATTR_FORCE 512 /* Not a change, but a change it */
++#define ATTR_ATTR_FLAG 1024
++
++
++struct iattr {
++ unsigned int ia_valid;
++ unsigned ia_mode;
++ unsigned ia_uid;
++ unsigned ia_gid;
++ unsigned ia_size;
++ unsigned ia_atime;
++ unsigned ia_mtime;
++ unsigned ia_ctime;
++ unsigned int ia_attr_flags;
++};
++
++#define KERN_DEBUG
++
++
++#else
++
++#ifndef WIN32
++#include <linux/types.h>
++#include <linux/list.h>
++#include <linux/fs.h>
++#include <linux/stat.h>
++#endif
++
++#endif
++
++
++
++#if defined WIN32
++#undef new
++#endif
++
++#endif
++
+diff --git a/fs/yaffs/yaffs_ecc.c b/fs/yaffs/yaffs_ecc.c
+new file mode 100644
+index 0000000..166bcad
+--- /dev/null
++++ b/fs/yaffs/yaffs_ecc.c
+@@ -0,0 +1,287 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * yaffs_ecc.c: ECC generation/correction algorithms.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU Lesser General Public License
++ * version 2.1 as published by the Free Software Foundation.
++ */
++
++ /*
++ * This code implements the ECC algorithm used in SmartMedia.
++ *
++ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
++ * The two unused bit are set to 1.
++ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
++ * blocks are used on a 512-byte NAND page.
++ *
++ */
++
++// Table generated by gen-ecc.c
++// Using a table means we do not have to calculate p1..p4 and p1'..p4'
++// for each byte of data. These are instead provided in a table in bits7..2.
++// Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore
++// this bytes influence on the line parity.
++
++const char *yaffs_ecc_c_version = "$Id: yaffs_ecc.c,v 1.4 2005/07/31 00:28:04 charles Exp $";
++
++#include "yportenv.h"
++
++#include "yaffs_ecc.h"
++
++static const unsigned char column_parity_table[] = {
++0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
++0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
++0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
++0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
++0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
++0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
++0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
++0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
++0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
++0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
++0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
++0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
++0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
++0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
++0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
++0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
++};
++
++
++static int yaffs_CountBits(unsigned char x)
++{
++ int r = 0;
++ while(x)
++ {
++ if(x & 1) r++;
++ x >>= 1;
++ }
++ return r;
++}
++
++static int yaffs_CountBits32(unsigned x)
++{
++ int r = 0;
++ while(x)
++ {
++ if(x & 1) r++;
++ x >>= 1;
++ }
++ return r;
++}
++
++
++void yaffs_ECCCalculate(const unsigned char *data,unsigned char *ecc)
++{
++ unsigned int i;
++
++ unsigned char col_parity = 0;
++ unsigned char line_parity = 0;
++ unsigned char line_parity_prime = 0;
++ unsigned char t;
++ unsigned char b;
++
++ for(i = 0; i < 256; i++)
++ {
++ b = column_parity_table[*data++];
++ col_parity ^= b;
++
++ if(b & 0x01) // odd number of bits in the byte
++ {
++ line_parity ^= i;
++ line_parity_prime ^= ~i;
++ }
++
++ }
++
++ ecc[2] = (~col_parity) | 0x03;
++
++ t = 0;
++ if(line_parity & 0x80) t |= 0x80;
++ if(line_parity_prime & 0x80) t |= 0x40;
++ if(line_parity & 0x40) t |= 0x20;
++ if(line_parity_prime & 0x40) t |= 0x10;
++ if(line_parity & 0x20) t |= 0x08;
++ if(line_parity_prime & 0x20) t |= 0x04;
++ if(line_parity & 0x10) t |= 0x02;
++ if(line_parity_prime & 0x10) t |= 0x01;
++ ecc[1] = ~t;
++
++ t = 0;
++ if(line_parity & 0x08) t |= 0x80;
++ if(line_parity_prime & 0x08) t |= 0x40;
++ if(line_parity & 0x04) t |= 0x20;
++ if(line_parity_prime & 0x04) t |= 0x10;
++ if(line_parity & 0x02) t |= 0x08;
++ if(line_parity_prime & 0x02) t |= 0x04;
++ if(line_parity & 0x01) t |= 0x02;
++ if(line_parity_prime & 0x01) t |= 0x01;
++ ecc[0] = ~t;
++
++#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
++ // Swap the bytes into the wrong order
++ t = ecc[0];
++ ecc[0] = ecc[1];
++ ecc[1] = t;
++#endif
++}
++
++int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, const unsigned char *test_ecc)
++{
++ unsigned char d0, d1, d2; // deltas
++
++ d0 = read_ecc[0] ^ test_ecc[0];
++ d1 = read_ecc[1] ^ test_ecc[1];
++ d2 = read_ecc[2] ^ test_ecc[2];
++
++
++
++ if((d0 | d1 | d2) == 0)
++ {
++ // no error
++ return 0;
++ }
++
++ if( ((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
++ ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
++ ((d2 ^ (d2 >> 1)) & 0x54) == 0x54)
++ {
++ // Single bit (recoverable) error in data
++
++ unsigned byte;
++ unsigned bit;
++
++#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
++ // swap the bytes to correct for the wrong order
++ unsigned char t;
++
++ t = d0;
++ d0 = d1;
++ d1 = t;
++#endif
++
++ bit = byte = 0;
++
++
++ if(d1 & 0x80) byte |= 0x80;
++ if(d1 & 0x20) byte |= 0x40;
++ if(d1 & 0x08) byte |= 0x20;
++ if(d1 & 0x02) byte |= 0x10;
++ if(d0 & 0x80) byte |= 0x08;
++ if(d0 & 0x20) byte |= 0x04;
++ if(d0 & 0x08) byte |= 0x02;
++ if(d0 & 0x02) byte |= 0x01;
++
++ if(d2 & 0x80) bit |= 0x04;
++ if(d2 & 0x20) bit |= 0x02;
++ if(d2 & 0x08) bit |= 0x01;
++
++ data[byte] ^= (1 << bit);
++
++ return 1;
++ }
++
++ if((yaffs_CountBits(d0)+yaffs_CountBits(d1)+yaffs_CountBits(d2)) == 1)
++ {
++ // Reccoverable error in ecc
++
++ read_ecc[0] = test_ecc[0];
++ read_ecc[1] = test_ecc[1];
++ read_ecc[2] = test_ecc[2];
++
++ return 1;
++ }
++
++ // Unrecoverable error
++
++ return -1;
++
++
++}
++
++
++
++void yaffs_ECCCalculateOther(const unsigned char *data,unsigned nBytes, yaffs_ECCOther *eccOther)
++{
++ unsigned int i;
++
++ unsigned char col_parity = 0;
++ unsigned line_parity = 0;
++ unsigned line_parity_prime = 0;
++ unsigned char b;
++
++ for(i = 0; i < nBytes; i++)
++ {
++ b = column_parity_table[*data++];
++ col_parity ^= b;
++
++ if(b & 0x01) // odd number of bits in the byte
++ {
++ line_parity ^= i;
++ line_parity_prime ^= ~i;
++ }
++
++ }
++
++ eccOther->colParity = (col_parity >> 2) & 0x3f;
++ eccOther->lineParity = line_parity;
++ eccOther->lineParityPrime = line_parity_prime;
++}
++
++int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, yaffs_ECCOther *read_ecc, const yaffs_ECCOther *test_ecc)
++{
++ unsigned char cDelta; // column parity delta
++ unsigned lDelta; // line parity delta
++ unsigned lDeltaPrime; // line parity delta
++ unsigned bit;
++
++ cDelta = read_ecc->colParity ^ test_ecc->colParity;
++ lDelta = read_ecc->lineParity ^ test_ecc->lineParity;
++ lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime;
++
++ if((cDelta | lDelta | lDeltaPrime) == 0)
++ {
++ // no error
++ return 0;
++ }
++
++ if( lDelta == ~lDeltaPrime &&
++ (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) // Not correct
++ {
++ // Single bit (recoverable) error in data
++
++ bit = 0;
++
++ if(cDelta & 0x20) bit |= 0x04;
++ if(cDelta & 0x08) bit |= 0x02;
++ if(cDelta & 0x02) bit |= 0x01;
++
++ data[lDelta] ^= (1 << bit);
++
++ return 1;
++ }
++
++ if((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + yaffs_CountBits(cDelta)) == 1)
++ {
++ // Reccoverable error in ecc
++
++ *read_ecc = *test_ecc;
++ return 1;
++ }
++
++ // Unrecoverable error
++
++ return -1;
++
++
++}
++
++
++
+diff --git a/fs/yaffs/yaffs_ecc.h b/fs/yaffs/yaffs_ecc.h
+new file mode 100644
+index 0000000..f96d707
+--- /dev/null
++++ b/fs/yaffs/yaffs_ecc.h
+@@ -0,0 +1,41 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * yaffs_ecc.c: ECC generation/correction algorithms.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ *
++ * 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.
++ *
++ */
++
++ /*
++ * This code implements the ECC algorithm used in SmartMedia.
++ *
++ * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
++ * The two unused bit are set to 1.
++ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
++ * blocks are used on a 512-byte NAND page.
++ *
++ */
++
++#ifndef __YAFFS_ECC_H__
++#define __YAFFS_ECC_H__
++
++typedef struct
++{
++ unsigned char colParity;
++ unsigned lineParity;
++ unsigned lineParityPrime;
++} yaffs_ECCOther;
++
++void yaffs_ECCCalculate(const unsigned char *data,unsigned char *ecc);
++int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, const unsigned char *test_ecc);
++
++void yaffs_ECCCalculateOther(const unsigned char *data,unsigned nBytes, yaffs_ECCOther *ecc);
++int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, yaffs_ECCOther *read_ecc, const yaffs_ECCOther *test_ecc);
++#endif
+diff --git a/fs/yaffs/yaffs_fs.c b/fs/yaffs/yaffs_fs.c
+new file mode 100644
+index 0000000..717f41a
+--- /dev/null
++++ b/fs/yaffs/yaffs_fs.c
+@@ -0,0 +1,1727 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_fs.c
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * 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.
++ *
++ *
++ * Acknowledgements:
++ * * Luc van OostenRyck for numerous patches.
++ * * Nick Bane for numerous patches.
++ * * Nick Bane for 2.5/2.6 integration.
++ * * Andras Toth for mknod rdev issue.
++ * * Michael Fischer for finding the problem with inode inconsistency.
++ * * Some code bodily lifted from JFFS2.
++ */
++
++
++const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.27 2005/08/04 22:47:36 luc Exp $";
++extern const char *yaffs_guts_c_version;
++
++
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/version.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/list.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>
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
++
++#include <linux/statfs.h> /* Added NCB 15-8-2003 */
++#include <asm/statfs.h>
++#define UnlockPage(p) unlock_page(p)
++#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
++#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) // FIXME: use sb->s_id instead ?
++
++#else
++
++#include <linux/locks.h>
++#define BDEVNAME_SIZE 0
++#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
++
++#endif
++
++#include <asm/uaccess.h>
++
++#include "yportenv.h"
++#include "yaffs_guts.h"
++
++
++
++
++unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS;
++//unsigned yaffs_traceMask = 0xFFFFFFFF;
++
++
++#ifdef CONFIG_YAFFS_YAFFS1
++#include <linux/mtd/mtd.h>
++#include "yaffs_mtdif.h"
++#include "yaffs_mtdif2.h"
++#endif //CONFIG_YAFFS_YAFFS1
++
++//#define T(x) printk x
++
++
++
++#define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
++#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 int yaffs_file_flush(struct file* file);
++
++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(2,5,0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
++#endif
++static void yaffs_read_inode (struct inode *inode);
++
++static void yaffs_put_inode (struct inode *inode);
++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
++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);
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer, int buflen);
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++
++
++
++static struct address_space_operations yaffs_file_address_operations = {
++ .readpage = yaffs_readpage,
++ .writepage = yaffs_writepage,
++ .prepare_write = yaffs_prepare_write,
++ .commit_write = yaffs_commit_write,
++};
++
++static 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,
++};
++
++static struct inode_operations yaffs_file_inode_operations = {
++ .setattr = yaffs_setattr,
++};
++
++static struct inode_operations yaffs_symlink_inode_operations = {
++ .readlink = yaffs_readlink,
++ .follow_link = yaffs_follow_link,
++ .setattr = yaffs_setattr,
++};
++
++static 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 struct file_operations yaffs_dir_operations = {
++ .read = generic_read_dir,
++ .readdir = yaffs_readdir,
++ .fsync = yaffs_sync_object,
++};
++
++static struct super_operations yaffs_super_ops = {
++ .statfs = yaffs_statfs,
++ .read_inode = yaffs_read_inode,
++ .put_inode = yaffs_put_inode,
++ .put_super = yaffs_put_super,
++ .delete_inode = yaffs_delete_inode,
++ .clear_inode = yaffs_clear_inode,
++};
++
++
++
++static void yaffs_GrossLock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
++
++ down(&dev->grossLock);
++}
++
++static void yaffs_GrossUnlock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
++ 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;
++}
++
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++{
++ 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;
++ else {
++ ret = vfs_follow_link(nd,alias);
++ kfree(alias);
++ }
++ return ERR_PTR (ret);
++}
++
++
++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,(KERN_DEBUG"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
++
++
++
++ if(obj)
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"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);
++
++ yaffs_GrossUnlock(dev);
++
++ // return dentry;
++ return NULL;
++#endif
++ }
++
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
++
++ }
++ yaffs_GrossUnlock(dev);
++
++/* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
++ d_add(dentry,inode);
++
++ return NULL;
++ // return (ERR_PTR(-EIO));
++
++}
++
++// 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)));
++
++}
++
++// 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 ant the yaffs_Object.
++ obj->myInode = NULL;
++ inode->u.generic_ip = 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_DeleteFile(obj);
++ yaffs_GrossUnlock(dev);
++ }
++ clear_inode(inode);
++}
++
++
++static int yaffs_file_flush(struct file* file)
++{
++ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
++
++ yaffs_Device *dev = obj->myDev;
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"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,(KERN_DEBUG"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,(KERN_DEBUG"yaffs_writepage at %08x, inode size = %08x!!!\n", (unsigned)(page->index << PAGE_CACHE_SHIFT), (unsigned) inode->i_size));
++ T(YAFFS_TRACE_OS,(KERN_DEBUG" -> 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);
++ }
++ // What's happening here?
++ ///* OK, are we completely out? */
++ //if (page->index >= end_index+1 || !offset)
++ // return -EIO;
++
++ get_page(page);
++
++
++ buffer = kmap(page);
++
++ obj = yaffs_InodeToObject(inode);
++ yaffs_GrossLock(obj->myDev);
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_writepage at %08x, size %08x\n", (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"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;
++}
++
++
++
++static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
++{
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
++ if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
++ return yaffs_readpage_nolock(f,pg);
++
++ return 0;
++
++}
++
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
++{
++
++ void *addr = page_address(pg) + offset;
++ loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
++ int nBytes = to - offset;
++ int nWritten;
++
++ unsigned spos = pos;
++ unsigned saddr = (unsigned)addr;
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
++ SetPageError(pg);
++ ClearPageUptodate(pg);
++ }
++ else
++ {
++ SetPageUptodate(pg);
++ }
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
++
++ return nWritten;
++
++}
++
++
++
++static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
++{
++ if (inode && obj)
++ {
++ inode->i_ino = obj->objectId;
++ inode->i_mode = obj->yst_mode;
++ inode->i_uid = obj->yst_uid;
++ inode->i_gid = obj->yst_gid;
++ inode->i_blksize = inode->i_sb->s_blocksize;
++#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,(KERN_DEBUG"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;
++ }
++
++
++ inode->u.generic_ip = obj;
++ obj->myInode = inode;
++
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n"));
++ return NULL;
++
++ }
++
++ if(!obj)
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n"));
++ return NULL;
++
++ }
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
++
++ inode = iget(sb,obj->objectId);
++
++ // NB Side effect: iget calls back to yaffs_read_inode().
++ // iget also increments the inode's i_count
++
++ 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,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write about to write writing %d bytes to object %d at %d\n",n,obj->objectId,ipos));
++ }
++
++ nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n,0);
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d 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,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
++ }
++
++ }
++ yaffs_GrossUnlock(dev);
++
++ return nWritten != n ? -ENOSPC : nWritten;
++}
++
++
++
++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 list_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,(KERN_DEBUG"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,(KERN_DEBUG"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;
++
++ list_for_each(i,&obj->variant.directoryVariant.children)
++ {
++ curoffs++;
++ if(curoffs >= offset)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++
++ yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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(2,5,0))
++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 = current->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
++
++ if(parent)
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
++ parent->objectId,parent->variantType));
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"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,(KERN_DEBUG"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,(KERN_DEBUG"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,(KERN_DEBUG"yaffs_mknod: making file\n"));
++ obj = NULL; // Do we ever get here?
++ break;
++ }
++
++ if(obj)
++ {
++ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
++ d_instantiate(dentry, inode);
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
++ error = 0;
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
++ error = -ENOMEM;
++ }
++
++ yaffs_GrossUnlock(dev);
++
++ return error;
++}
++
++static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
++{
++ int retVal;
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
++ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
++#if 0
++ // attempt to fix dir bug - didn't work
++ if(!retVal)
++ {
++ dget(dentry);
++ }
++#endif
++ 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,(KERN_DEBUG"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,(KERN_DEBUG"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);
++
++
++ yaffs_GrossUnlock(dev);
++
++ if( retVal == YAFFS_OK)
++ {
++ dentry->d_inode->i_nlink--;
++ mark_inode_dirty(dentry->d_inode);
++ return 0;
++ }
++ else
++ {
++ 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,(KERN_DEBUG"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,(KERN_DEBUG"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 = current->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"symlink created OK\n"));
++ return 0;
++ }
++ else
++ {
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"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,(KERN_DEBUG"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;
++ int removed = 0;
++ yaffs_Object *target;
++
++ 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 &&
++ !list_empty(&target->variant.directoryVariant.children))
++ {
++ retVal = YAFFS_FAIL;
++ }
++ else
++ {
++
++ // Unlink the target if it exists
++ removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
++
++
++ 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(removed == YAFFS_OK)
++ {
++ 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,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
++
++ if((error = inode_change_ok(inode,attr)) == 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(2,5,0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
++#endif
++{
++
++
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
++
++ yaffs_GrossLock(dev);
++
++
++ buf->f_type = YAFFS_MAGIC;
++ buf->f_bsize = sb->s_blocksize;
++ buf->f_namelen = 255;
++ if(sb->s_blocksize > dev->nBytesPerChunk)
++ {
++
++ buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock/
++ (sb->s_blocksize/dev->nBytesPerChunk);
++ buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
++ (sb->s_blocksize/dev->nBytesPerChunk);
++ }
++ else
++ {
++
++ buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * dev->nChunksPerBlock *
++ (dev->nBytesPerChunk/sb->s_blocksize);
++ buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev) *
++ (dev->nBytesPerChunk/sb->s_blocksize);
++ }
++ buf->f_files = 0;
++ buf->f_ffree = 0;
++ buf->f_bavail = buf->f_bfree;
++
++ yaffs_GrossUnlock(dev);
++ return 0;
++}
++
++static void yaffs_read_inode (struct inode *inode)
++{
++ // NB This is called as a side effect of other functions and
++ // thus gross locking should always be in place already.
++
++ yaffs_Object *obj ;
++ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
++
++ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
++
++ obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
++
++ yaffs_FillInodeFromObject(inode,obj);
++
++}
++
++static LIST_HEAD(yaffs_dev_list);
++
++static void yaffs_put_super(struct super_block *sb)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ yaffs_GrossLock(dev);
++ if(dev->putSuperFunc)
++ {
++ dev->putSuperFunc(sb);
++ }
++ yaffs_Deinitialise(dev);
++ yaffs_GrossUnlock(dev);
++
++ /* we assume this is protected by lock_kernel() in mount/umount */
++ list_del(&dev->devList);
++
++ kfree(dev);
++}
++
++
++#ifdef CONFIG_YAFFS_YAFFS1
++
++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);
++}
++
++#endif
++
++
++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;
++
++ sb->s_magic = YAFFS_MAGIC;
++ sb->s_op = &yaffs_super_ops;
++
++ 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));
++
++
++
++ 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,(" oobblock %d\n",mtd->oobblock));
++ T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
++ T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
++ T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
++
++ if(yaffsVersion == 2)
++ {
++ // Check for version 2 style functions
++ if(!mtd->erase ||
++// !mtd->block_isbad ||
++// !mtd->block_markbad ||
++ !mtd->read ||
++ !mtd->write ||
++ !mtd->write_ecc ||
++ !mtd->read_ecc ||
++ !mtd->read_oob ||
++ !mtd->write_oob )
++ {
++ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
++ return NULL;
++ }
++
++ if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
++ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
++ {
++ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
++ return NULL;
++ } }
++ else
++ {
++ // Check for V1 style functions
++ if(!mtd->erase ||
++ !mtd->read ||
++ !mtd->write ||
++ !mtd->write_ecc ||
++ !mtd->read_ecc ||
++ !mtd->read_oob ||
++ !mtd->write_oob )
++ {
++ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
++ return NULL;
++ }
++
++ if(mtd->oobblock != 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 = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
++ dev->startBlock = 0;
++ dev->endBlock = nBlocks - 1;
++ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
++ dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
++ dev->nReservedBlocks = 5;
++ dev->nShortOpCaches = 10; // Enable short op caching
++
++
++ // ... 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;
++ dev->nBytesPerChunk = mtd->oobblock;
++ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
++ nBlocks = mtd->size / mtd->erasesize;
++ dev->startBlock = 0;
++ dev->endBlock = nBlocks - 1;
++ }
++ else
++ {
++ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
++ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
++ dev->isYaffs2 = 0;
++ }
++ // ... and common functions
++ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
++ dev->initialiseNAND = nandmtd_InitialiseNAND;
++
++ dev->putSuperFunc = yaffs_MTDPutSuper;
++
++#ifndef CONFIG_YAFFS_DOES_ECC
++ dev->useNANDECC = 1;
++#endif
++
++ /* we assume this is protected by lock_kernel() in mount/umount */
++ list_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"));
++
++ // Create root inode
++ if(err == YAFFS_OK)
++ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev));
++
++ yaffs_GrossUnlock(dev);
++
++ if (!inode)
++ return NULL;
++
++// added NCB
++ 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;
++
++ T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
++ return sb;
++}
++
++
++
++#ifdef CONFIG_YAFFS_YAFFS1
++
++#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 : -1;
++}
++
++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);
++}
++
++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
++
++#endif // CONFIG_YAFFS_YAFFS1
++
++#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 : -1;
++}
++
++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);
++}
++
++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,"chunkGroupBits..... %d\n",dev->chunkGroupBits);
++ buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize);
++ buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks);
++ 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,"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);
++
++ return buf;
++}
++
++static int yaffs_proc_read(
++ char *page,
++ char **start,
++ off_t offset,
++ int count,
++ int *eof,
++ void *data
++ )
++{
++ struct list_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. */
++ list_for_each(item, &yaffs_dev_list) {
++ yaffs_Device *dev = list_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;
++}
++
++// 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[] =
++{
++#ifdef CONFIG_YAFFS_YAFFS1
++ { &yaffs_fs_type,0},
++#endif
++#ifdef CONFIG_YAFFS_YAFFS2
++ { &yaffs2_fs_type,0},
++#endif
++ { 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_read_entry("yaffs",
++ S_IRUGO | S_IFREG,
++ &proc_root,
++ yaffs_proc_read,
++ NULL);
++ if(!my_proc_entry)
++ {
++ 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",&proc_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., 2002,2003,2004");
++MODULE_LICENSE("GPL");
++
++
+diff --git a/fs/yaffs/yaffs_guts.c b/fs/yaffs/yaffs_guts.c
+new file mode 100644
+index 0000000..bf13f91
+--- /dev/null
++++ b/fs/yaffs/yaffs_guts.c
+@@ -0,0 +1,6346 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++ //yaffs_guts.c
++
++const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.15 2005/08/02 04:24:22 charles Exp $";
++
++#include "yportenv.h"
++
++#include "yaffsinterface.h"
++#include "yaffs_guts.h"
++#include "yaffs_tagsvalidity.h"
++
++
++#include "yaffs_tagscompat.h"
++
++#ifdef CONFIG_YAFFS_WINCE
++void yfsd_LockYAFFS(BOOL fsLockOnly);
++void yfsd_UnlockYAFFS(BOOL fsLockOnly);
++#endif
++
++#define YAFFS_PASSIVE_GC_CHUNKS 2
++
++#if 0
++// Use Steven Hill's ECC struff instead
++// External functions for ECC on data
++void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
++int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
++#define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
++#define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
++#else
++#include "yaffs_ecc.h"
++#endif
++
++#if 0
++// countBits is a quick way of counting the number of bits in a byte.
++// ie. countBits[n] holds the number of 1 bits in a byte with the value n.
++
++static const char yaffs_countBitsTable[256] =
++{
++0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
++};
++
++static int yaffs_CountBits(__u8 x)
++{
++ int retVal;
++ retVal = yaffs_countBitsTable[x];
++ return retVal;
++}
++
++#endif
++
++
++#if 0
++// Stuff using yea olde tags
++static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr);
++static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
++
++static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted);
++static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted);
++#else
++#endif
++
++// NAND access
++
++
++static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags);
++static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags);
++static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
++static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state,unsigned *sequenceNumber);
++// Local prototypes
++static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve);
++#if 0
++static int yaffs_CheckObjectHashSanity(yaffs_Device *dev);
++#endif
++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 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 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo);
++static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
++
++
++// Robustification (if it ever comes about...)
++static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND);
++#if 0
++static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
++#endif
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags);
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags);
++
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND);
++
++static int yaffs_UnlinkWorker(yaffs_Object *obj);
++static void yaffs_DestroyObject(yaffs_Object *obj);
++
++#if 0
++static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize);
++#endif
++
++static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject);
++
++
++loff_t yaffs_GetFileSize(yaffs_Object *obj);
++
++
++static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve);
++
++static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
++
++#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 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags)
++{
++ chunkInNAND -= dev->chunkOffset;
++
++ if(dev->readChunkWithTagsFromNAND)
++ return dev->readChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
++ else
++ return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
++}
++
++static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *buffer, yaffs_ExtendedTags *tags)
++{
++ chunkInNAND -= dev->chunkOffset;
++
++ if(tags)
++ {
++ tags->sequenceNumber = dev->sequenceNumber;
++ tags->chunkUsed = 1;
++ if(!yaffs_ValidateTags(tags))
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("Writing uninitialised tags" TENDSTR)));
++ YBUG();
++ }
++ T(YAFFS_TRACE_WRITE,(TSTR("Writing chunk %d tags %d %d"TENDSTR),chunkInNAND,tags->objectId,tags->chunkId));
++ }
++ else
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("Writing with no tags" TENDSTR)));
++ YBUG();
++ }
++
++ if(dev->writeChunkWithTagsToNAND)
++ return dev->writeChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
++ else
++ return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
++}
++
++static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
++{
++ blockNo -= dev->blockOffset;
++
++ if(dev->markNANDBlockBad)
++ return dev->markNANDBlockBad(dev,blockNo);
++ else
++ return yaffs_TagsCompatabilityMarkNANDBlockBad(dev,blockNo);
++}
++static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state, unsigned *sequenceNumber)
++{
++ blockNo -= dev->blockOffset;
++
++ if(dev->queryNANDBlock)
++ return dev->queryNANDBlock(dev,blockNo,state,sequenceNumber);
++ else
++ return yaffs_TagsCompatabilityQueryNANDBlock(dev,blockNo,state,sequenceNumber);
++}
++
++static int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
++{
++ int result;
++
++ blockInNAND -= dev->blockOffset;
++
++ dev->nBlockErasures++;
++ result = dev->eraseBlockInNAND(dev,blockInNAND);
++
++ if(!result)result = dev->eraseBlockInNAND(dev,blockInNAND); // If at first we don't succeed, try again *once*.
++ return result;
++}
++
++static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
++{
++ return dev->initialiseNAND(dev);
++}
++
++
++
++
++// Temporary buffer manipulations
++
++static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo)
++{
++ int i,j;
++ for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ {
++ if(dev->tempBuffer[i].line == 0)
++ {
++ dev->tempBuffer[i].line = lineNo;
++ if((i+1) > dev->maxTemp)
++ {
++ dev->maxTemp = i + 1;
++ for(j = 0; j <= i; j++)
++ dev->tempBuffer[j].maxLine = dev->tempBuffer[j].line;
++ }
++
++ return dev->tempBuffer[i].buffer;
++ }
++ }
++
++ T(YAFFS_TRACE_BUFFERS,(TSTR("Out of temp buffers at line %d, other held by lines:"),lineNo));
++ for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ {
++ T(YAFFS_TRACE_BUFFERS,(TSTR(" %d "),dev->tempBuffer[i].line));
++ }
++ T(YAFFS_TRACE_BUFFERS,(TSTR(" "TENDSTR)));
++
++ dev->unmanagedTempAllocations++;
++ // Get an unmanaged one
++ return YMALLOC(dev->nBytesPerChunk);
++
++
++}
++
++static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo)
++{
++ int i;
++ for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ {
++ if(dev->tempBuffer[i].buffer == buffer)
++ {
++ dev->tempBuffer[i].line = 0;
++ return;
++ }
++ }
++
++ if(buffer)
++ {
++ // assume it is an unmanaged one.
++ T(YAFFS_TRACE_BUFFERS,(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),lineNo));
++ YFREE(buffer);
++ dev->unmanagedTempDeallocations++;
++ }
++
++}
++
++
++// 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));
++}
++
++static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev,int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev,blk);
++
++ memset(blkBits,0,dev->chunkBitmapStride);
++}
++
++static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev,int blk,int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev,blk);
++
++ blkBits[chunk/8] &= ~ (1<<(chunk & 7));
++}
++
++static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev,int blk,int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev,blk);
++
++ blkBits[chunk/8] |= (1<<(chunk & 7));
++}
++
++static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev,int blk,int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev,blk);
++ return (blkBits[chunk/8] & (1<<(chunk & 7))) ? 1 :0;
++}
++
++static Y_INLINE 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;
++}
++
++
++static Y_INLINE int yaffs_HashFunction(int n)
++{
++ return (n % YAFFS_NOBJECT_BUCKETS);
++}
++
++
++yaffs_Object *yaffs_Root(yaffs_Device *dev)
++{
++ return dev->rootDir;
++}
++
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
++{
++ return dev->lostNFoundDir;
++}
++
++
++
++
++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;
++
++// NCB dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
++
++ if(!yaffs_CheckFF(data,dev->nBytesPerChunk) || tags.chunkUsed)
++ {
++ T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not erased" TENDSTR),chunkInNAND));
++ retval = YAFFS_FAIL;
++ }
++
++ yaffs_ReleaseTempBuffer(dev,data,__LINE__);
++
++ return retval;
++
++}
++
++
++
++#if 1
++static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_ExtendedTags *tags,int useReserve)
++{
++ int chunk;
++
++ int writeOk = 1;
++ int attempts = 0;
++
++
++
++ do{
++ chunk = yaffs_AllocateChunk(dev,useReserve);
++
++ if(chunk >= 0)
++ {
++
++ // First check this chunk is erased...
++#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
++ writeOk = yaffs_CheckChunkErased(dev,chunk);
++#endif
++ if(!writeOk)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
++ }
++ else
++ {
++ writeOk = yaffs_WriteChunkWithTagsToNAND(dev,chunk,data,tags);
++ }
++ attempts++;
++
++ if(writeOk)
++ {
++ // Copy the data into the robustification buffer.
++ // NB We do this at the end to prevent duplicates in the case of a write error.
++ //Todo
++ yaffs_HandleWriteChunkOk(dev,chunk,data,tags);
++ }
++ else
++ {
++ yaffs_HandleWriteChunkError(dev,chunk);
++ }
++ }
++
++ } while(chunk >= 0 && ! writeOk);
++
++ if(attempts > 1)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
++ dev->nRetriedWrites+= (attempts - 1);
++ }
++
++
++
++ return chunk;
++}
++#endif
++
++
++///
++// Functions for robustisizing
++//
++//
++
++static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
++{
++
++ yaffs_MarkBlockBad(dev,blockInNAND);
++
++ yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
++
++ dev->nRetiredBlocks++;
++}
++
++
++#if 0
++static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
++{
++ dev->doingBufferedBlockRewrite = 1;
++ //
++ // Remove erased chunks
++ // Rewrite existing chunks to a new block
++ // Set current write block to the new block
++
++ dev->doingBufferedBlockRewrite = 0;
++
++ return 1;
++}
++
++
++static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
++
++ // Mark the block for retirement
++ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
++
++
++ //TODO
++ // Just do a garbage collection on the affected block then retire the block
++ // NB recursion
++}
++
++
++static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
++{
++}
++
++#endif
++
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
++{
++}
++
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags)
++{
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
++
++ // Mark the block for retirement
++ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
++ // Delete the chunk
++ yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
++}
++
++
++
++#if 0
++static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize)
++{
++
++
++ if( memcmp(d0,d1,dataSize) != 0 ||
++ s0->tagByte0 != s1->tagByte0 ||
++ s0->tagByte1 != s1->tagByte1 ||
++ s0->tagByte2 != s1->tagByte2 ||
++ s0->tagByte3 != s1->tagByte3 ||
++ s0->tagByte4 != s1->tagByte4 ||
++ s0->tagByte5 != s1->tagByte5 ||
++ s0->tagByte6 != s1->tagByte6 ||
++ s0->tagByte7 != s1->tagByte7 ||
++ s0->ecc1[0] != s1->ecc1[0] ||
++ s0->ecc1[1] != s1->ecc1[1] ||
++ s0->ecc1[2] != s1->ecc1[2] ||
++ s0->ecc2[0] != s1->ecc2[0] ||
++ s0->ecc2[1] != s1->ecc2[1] ||
++ s0->ecc2[2] != s1->ecc2[2] )
++ {
++ return 0;
++ }
++
++ return 1;
++}
++#endif
++
++
++///////////////////////// Object management //////////////////
++// List of spare objects
++// The list is hooked together using the first pointer
++// in the object
++
++// static yaffs_Object *yaffs_freeObjects = NULL;
++
++// static int yaffs_nFreeObjects;
++
++// static yaffs_ObjectList *yaffs_allocatedObjectList = NULL;
++
++// static yaffs_ObjectBucket yaffs_objectBucket[YAFFS_NOBJECT_BUCKETS];
++
++
++static __u16 yaffs_CalcNameSum(const YCHAR *name)
++{
++ __u16 sum = 0;
++ __u16 i = 1;
++
++ YUCHAR *bname = (YUCHAR *)name;
++ if(bname)
++ {
++ while ((*bname) && (i <=YAFFS_MAX_NAME_LENGTH))
++ {
++
++#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
++ 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);
++}
++
++#if 0
++void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
++{
++ yaffs_ECCCalculate(data , spare->ecc1);
++ yaffs_ECCCalculate(&data[256] , spare->ecc2);
++}
++#endif
++
++
++///////////////////////// TNODES ///////////////////////
++
++// List of spare tnodes
++// The list is hooked together using the first pointer
++// in the tnode.
++
++//static yaffs_Tnode *yaffs_freeTnodes = NULL;
++
++// static int yaffs_nFreeTnodes;
++
++//static yaffs_TnodeList *yaffs_allocatedTnodeList = NULL;
++
++
++
++// 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;
++ yaffs_Tnode *newTnodes;
++ yaffs_TnodeList *tnl;
++
++ if(nTnodes < 1) return YAFFS_OK;
++
++ // make these things
++
++ newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
++
++ if (!newTnodes)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ // Hook them into the free list
++ 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;
++ 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)));
++
++ }
++ 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_GetTnode(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--;
++ // zero out
++ memset(tn,0,sizeof(yaffs_Tnode));
++ }
++
++
++ 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++;
++ }
++}
++
++
++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;
++
++}
++
++#if 0
++void yaffs_TnodeTest(yaffs_Device *dev)
++{
++
++ int i;
++ int j;
++ yaffs_Tnode *tn[1000];
++
++ YINFO("Testing TNodes");
++
++ for(j = 0; j < 50; j++)
++ {
++ for(i = 0; i < 1000; i++)
++ {
++ tn[i] = yaffs_GetTnode(dev);
++ if(!tn[i])
++ {
++ YALERT("Getting tnode failed");
++ }
++ }
++ for(i = 0; i < 1000; i+=3)
++ {
++ yaffs_FreeTnode(dev,tn[i]);
++ tn[i] = NULL;
++ }
++
++ }
++}
++#endif
++
++
++////////////////// END OF 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.
++// Used when reading.....
++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)
++ {
++// char str[50];
++// sprintf(str,"Bad level %d",level);
++// YALERT(str);
++ return NULL;
++ }
++
++ if(chunkId > YAFFS_MAX_CHUNK_ID)
++ {
++// char str[50];
++// sprintf(str,"Bad chunkId %d",chunkId);
++// YALERT(str);
++ return NULL;
++ }
++
++ // First check we're tall enough (ie enough topLevel)
++
++ i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
++ requiredTallness = 0;
++ while(i)
++ {
++ i >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++
++ if(requiredTallness > fStruct->topLevel)
++ {
++ // Not tall enough, so we can't find it, return NULL.
++ return NULL;
++ }
++
++
++ // Traverse down to level 0
++ while (level > 0 && tn)
++ {
++ tn = tn->internal[(chunkId >>(/* dev->chunkGroupBits + */ 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.
++//
++static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStructure *fStruct, __u32 chunkId)
++{
++
++ yaffs_Tnode *tn;
++
++ int requiredTallness;
++ int i;
++ int l;
++
++ __u32 x;
++
++
++ //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId));
++
++ // Check sane level and page Id
++ if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
++ {
++// char str[50];
++// sprintf(str,"Bad level %d",fStruct->topLevel);
++// YALERT(str);
++ return NULL;
++ }
++
++ if(chunkId > YAFFS_MAX_CHUNK_ID)
++ {
++// char str[50];
++// sprintf(str,"Bad chunkId %d",chunkId);
++// YALERT(str);
++ return NULL;
++ }
++
++ // First check we're tall enough (ie enough topLevel)
++
++ x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
++ requiredTallness = 0;
++ while(x)
++ {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++ //T((TSTR(" required=%d"),requiredTallness));
++
++
++ if(requiredTallness > fStruct->topLevel)
++ {
++ // Not tall enough,gotta make the tree taller
++ for(i = fStruct->topLevel; i < requiredTallness; i++)
++ {
++ //T((TSTR(" add new top")));
++
++ 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;
++ while (l > 0 && tn)
++ {
++ x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK;
++
++ //T((TSTR(" [%d:%d]"),l,i));
++
++ if(!tn->internal[x])
++ {
++ //T((TSTR(" added")));
++
++ tn->internal[x] = yaffs_GetTnode(dev);
++ }
++
++ tn = tn->internal[x];
++ l--;
++
++ }
++
++ //TSTR(TENDSTR)));
++
++ 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--)
++ {
++ if(tn->level0[i])
++ {
++
++ chunkInInode = (chunkOffset << YAFFS_TNODES_LEVEL0_BITS ) + i;
++
++ theChunk = tn->level0[i] << dev->chunkGroupBits;
++
++ 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;
++ }
++ }
++
++ }
++
++ tn->level0[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--)
++ {
++ if(tn->level0[i])
++ {
++ // Note this does not find the real chunk, only the chunk group.
++ // We make an assumption that a chunk group is niot larger than a block.
++ theChunk = (tn->level0[i] << dev->chunkGroupBits);
++
++ yaffs_SoftDeleteChunk(dev,theChunk);
++ tn->level0[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.
++
++// yaffs_PruneWorker should only be called by yaffs_PruneFileStructure()
++
++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));
++
++ if (!newObjects)
++ {
++ 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 list_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 = YMALLOC(sizeof(yaffs_ObjectList));
++ if(!list)
++ {
++ T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR)));
++ }
++ else
++ {
++ list->objects = newObjects;
++ list->next = dev->allocatedObjectList;
++ dev->allocatedObjectList = list;
++ }
++
++
++
++ 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;
++
++ // 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--;
++
++ // Now sweeten it up...
++
++ memset(tn,0,sizeof(yaffs_Object));
++ tn->myDev = dev;
++ tn->chunkId = -1;
++ tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
++ INIT_LIST_HEAD(&(tn->hardLinks));
++ INIT_LIST_HEAD(&(tn->hashLink));
++ INIT_LIST_HEAD(&tn->siblings);
++
++ // 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);
++ }
++ }
++
++
++ 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 has 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->chunkId = 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(!list_empty(&tn->hashLink))
++ {
++ list_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__
++ 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);
++
++ // Link into the free list.
++ tn->siblings.next = (struct list_head *)(dev->freeObjects);
++ dev->freeObjects = tn;
++ dev->nFreeObjects++;
++}
++
++
++
++#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++)
++ {
++ INIT_LIST_HEAD(&dev->objectBucket[i].list);
++ dev->objectBucket[i].count = 0;
++ }
++
++}
++
++
++
++
++
++
++static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
++{
++ static int x = 0;
++ 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 list_head *i;
++
++ __u32 n = (__u32)bucket;
++
++ //yaffs_CheckObjectHashSanity();
++
++ while(!found)
++ {
++ found = 1;
++ n += YAFFS_NOBJECT_BUCKETS;
++ if(1 ||dev->objectBucket[bucket].count > 0)
++ {
++ list_for_each(i,&dev->objectBucket[bucket].list)
++ {
++ // If there is already one in the list
++ if(i && list_entry(i, yaffs_Object,hashLink)->objectId == n)
++ {
++ found = 0;
++ }
++ }
++ }
++ }
++
++ //T(("bucket %d count %d inode %d\n",bucket,yaffs_objectBucket[bucket].count,n);
++
++ return n;
++}
++
++static void yaffs_HashObject(yaffs_Object *in)
++{
++ int bucket = yaffs_HashFunction(in->objectId);
++ yaffs_Device *dev = in->myDev;
++
++ if(!list_empty(&in->hashLink))
++ {
++ //YINFO("!!!");
++ }
++
++
++ list_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 list_head *i;
++ yaffs_Object *in;
++
++ list_for_each(i,&dev->objectBucket[bucket].list)
++ {
++ // Look if it is in the list
++ if(i)
++ {
++ in = list_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;
++
++ if(number < 0)
++ {
++ number = yaffs_CreateNewObjectNumber(dev);
++ }
++
++ theObject = yaffs_AllocateEmptyObject(dev);
++
++ 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 = yaffs_GetTnode(dev);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ INIT_LIST_HEAD(&theObject->variant.directoryVariant.children);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ // No action required
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ // No action required
++ break;
++ 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));
++ 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;
++
++ 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)
++ {
++ in->chunkId = -1;
++ 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 = yaffs_CloneString(aliasString);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.equivalentObject = equivalentObject;
++ in->variant.hardLinkVariant.equivalentObjectId = equivalentObject->objectId;
++ list_add(&in->hardLinks,&equivalentObject->hardLinks);
++ break;
++ case YAFFS_OBJECT_TYPE_FILE: // do nothing
++ case YAFFS_OBJECT_TYPE_DIRECTORY: // do nothing
++ case YAFFS_OBJECT_TYPE_SPECIAL: // do nothing
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ break;
++ }
++
++ if(/*yaffs_GetNumberOfFreeChunks(dev) <= 0 || */
++ yaffs_UpdateObjectHeader(in,name,0,0,0) < 0)
++ {
++ // Could not create the object header, fail the creation
++ yaffs_DestroyObject(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);
++}
++
++// NB 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("tragendy: 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.
++ // Otherwise 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;
++ yaffs_Object *existingTarget;
++ int force = 0;
++
++#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
++
++ 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 &&
++ !list_empty(&existingTarget->variant.directoryVariant.children))
++ {
++ // There is a target that is a non-empty directory, so we have to fail
++ return YAFFS_FAIL; // EEXIST or ENOTEMPTY
++ }
++ else if(existingTarget)
++ {
++ // Nuke the target first, using shadowing
++ yaffs_ChangeObjectName(obj,newDir,newName,force,existingTarget->objectId);
++ yaffs_Unlink(newDir,newName);
++ }
++
++
++ return yaffs_ChangeObjectName(obj,newDir,newName,force,0);
++ }
++ return YAFFS_FAIL;
++}
++
++
++#if 0
++
++static int yaffs_CheckObjectHashSanity(yaffs_Device *dev)
++{
++ // Scan the buckets and check that the lists
++ // have as many members as the count says there are
++ int bucket;
++ int countEm;
++ struct list_head *j;
++ int ok = YAFFS_OK;
++
++ for(bucket = 0; bucket < YAFFS_NOBJECT_BUCKETS; bucket++)
++ {
++ countEm = 0;
++
++ list_for_each(j,&dev->objectBucket[bucket].list)
++ {
++ countEm++;
++ }
++
++ if(countEm != dev->objectBucket[bucket].count)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR)));
++ ok = YAFFS_FAIL;
++ }
++ }
++
++ return ok;
++}
++
++
++void yaffs_ObjectTest(yaffs_Device *dev)
++{
++ yaffs_Object *in[1000];
++ int inNo[1000];
++ yaffs_Object *inold[1000];
++ int i;
++ int j;
++
++ memset(in,0,1000*sizeof(yaffs_Object *));
++ memset(inold,0,1000*sizeof(yaffs_Object *));
++
++ yaffs_CheckObjectHashSanity(dev);
++
++ for(j = 0; j < 10; j++)
++ {
++ //T(("%d\n",j));
++
++ for(i = 0; i < 1000; i++)
++ {
++ in[i] = yaffs_CreateNewObject(dev,-1,YAFFS_OBJECT_TYPE_FILE);
++ if(!in[i])
++ {
++ YINFO("No more inodes");
++ }
++ else
++ {
++ inNo[i] = in[i]->objectId;
++ }
++ }
++
++ for(i = 0; i < 1000; i++)
++ {
++ if(yaffs_FindObjectByNumber(dev,inNo[i]) != in[i])
++ {
++ //T(("Differnce in look up test\n"));
++ }
++ else
++ {
++ // T(("Look up ok\n"));
++ }
++ }
++
++ yaffs_CheckObjectHashSanity(dev);
++
++ for(i = 0; i < 1000; i+=3)
++ {
++ yaffs_FreeObject(in[i]);
++ in[i] = NULL;
++ }
++
++
++ yaffs_CheckObjectHashSanity(dev);
++ }
++
++}
++
++#endif
++
++/////////////////////////// Block Management and Page Allocation ///////////////////
++
++
++static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks)
++{
++ dev->allocationBlock = -1; // force it to get a new one
++ //Todo we're assuming the malloc will pass.
++ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
++ // Set up dynamic blockinfo stuff.
++ dev->chunkBitmapStride = (dev->nChunksPerBlock+7)/8;
++ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
++ 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)
++{
++ YFREE(dev->blockInfo);
++ dev->blockInfo = NULL;
++ YFREE(dev->chunkBits);
++ 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);
++
++
++ return 1;
++
++}
++
++// 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;
++ yaffs_BlockInfo *bi;
++ static int nonAggressiveSkip = 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.
++
++
++ nonAggressiveSkip--;
++
++ if(!aggressive &&(nonAggressiveSkip > 0))
++ {
++ return -1;
++ }
++
++ 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 ; 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" TENDSTR),dirtiest,dev->nChunksPerBlock - pagesInUse));
++ }
++
++ dev->oldestDirtySequence = 0; // clear this
++
++ if(dirtiest > 0)
++ {
++ 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.
++ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
++
++ if(!bi->needsRetiring)
++ {
++ 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))
++ {
++ 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;
++ 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));
++ }
++}
++
++#if 0
++static void yaffs_DumpBlockStats(yaffs_Device *dev)
++{
++ int i,j;
++ yaffs_BlockInfo *bi;
++
++ for(i= dev->internalStartBlock; i <=dev->internalEndBlock; i++)
++ {
++ bi = yaffs_GetBlockInfo(dev,i);
++ T(YAFFS_TRACE_ALLOCATE,(TSTR("%3d state %d shrink %d inuse %d/%d seq %d pages"),i,
++ bi->blockState,bi->hasShrinkHeader,bi->pagesInUse,bi->softDeletions,bi->sequenceNumber));
++
++ for(j = 0; j < dev->nChunksPerBlock; j++)
++ {
++ if(yaffs_CheckChunkBit(dev,i,j))
++ {
++ T(YAFFS_TRACE_ALLOCATE,(TSTR(" %d"),j));
++
++ }
++ }
++ T(YAFFS_TRACE_ALLOCATE,(TSTR(" " TENDSTR)));
++
++ }
++}
++#endif
++
++
++static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
++{
++ int i;
++
++ yaffs_BlockInfo *bi;
++
++#if 0
++ static int j = 0;
++ j++;
++ if(j < 0 || j > 100)
++ {
++ j = 0;
++ yaffs_DumpBlockStats(dev);
++ }
++
++#endif
++
++ 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 eraased 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 eraased blocks, but there should have been %d" TENDSTR),dev->nErasedBlocks));
++
++
++
++
++
++ return -1;
++}
++
++
++// To determine if we have enough space we just look at the
++// number of erased blocks.
++
++static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
++{
++ int reservedChunks = (dev->nReservedBlocks * dev->nChunksPerBlock);
++ return (dev->nFreeChunks > reservedChunks);
++}
++
++
++static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve)
++{
++ 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;
++ }
++
++
++ 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 oldChunk;
++ int newChunk;
++ int chunkInBlock;
++ int markNAND;
++ int retVal = YAFFS_OK;
++ int cleanups = 0;
++ int i;
++
++ int chunksBefore = yaffs_GetErasedChunks(dev);
++ int chunksAfter;
++
++ yaffs_ExtendedTags tags;
++
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block);
++
++ yaffs_Object *object;
++
++ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
++
++ T(YAFFS_TRACE_TRACING,(TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR),block,bi->pagesInUse,bi->hasShrinkHeader));
++ //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
++
++ //yaffs_VerifyFreeChunks(dev);
++
++ bi->hasShrinkHeader = 0; // clear the flag so that the block can erase
++
++ dev->nFreeChunks -= bi->softDeletions; // Take off the number of soft deleted entries because
++ // they're going to get really deleted during GC.
++
++ dev->isDoingGC = 1;
++
++ if(!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__);
++
++ for(chunkInBlock = 0,oldChunk = block * dev->nChunksPerBlock;
++ chunkInBlock < dev->nChunksPerBlock && yaffs_StillSomeChunkBits(dev,block);
++ chunkInBlock++, oldChunk++ )
++ {
++ if(yaffs_CheckChunkBit(dev,block,chunkInBlock))
++ {
++
++ // This page is in use and might need to be copied off
++
++ markNAND = 1;
++
++ //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
++
++ yaffs_InitialiseTags(&tags);
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,oldChunk,buffer, &tags);
++
++ object = yaffs_FindObjectByNumber(dev,tags.objectId);
++
++ T(YAFFS_TRACE_GC_DETAIL,(TSTR("Collecting page %d, %d %d %d " TENDSTR),chunkInBlock,tags.objectId,tags.chunkId,tags.byteCount));
++
++ if(!object)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("page %d in gc has no object " TENDSTR),oldChunk));
++ }
++
++ if(object && object->deleted && tags.chunkId != 0)
++ {
++ // Data chunk in a 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.
++
++ //yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0);
++ 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->chunkId = 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 = (yaffs_ObjectHeader *)buffer;
++ oh->isShrink = 0;
++ tags.extraIsShrinkHeader = 0;
++ }
++
++ 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->chunkId = newChunk;
++ object->serial = tags.serialNumber;
++ }
++ else
++ {
++ // It's a data chunk
++ yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
++ }
++ }
++ }
++
++ yaffs_DeleteChunk(dev,oldChunk,markNAND,__LINE__);
++
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
++
++ //yaffs_VerifyFreeChunks(dev);
++
++ // 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);
++ }
++
++ }
++
++ }
++
++ if(chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev)))
++ {
++ T(YAFFS_TRACE_GC,(TSTR("gc did not increase free chunks before %d after %d" TENDSTR),chunksBefore,chunksAfter));
++ }
++
++
++ dev->isDoingGC = 0;
++
++ //yaffs_VerifyFreeChunks(dev);
++
++ return YAFFS_OK;
++}
++
++#if 0
++static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev)
++{
++ // find a file to delete
++ struct list_head *i;
++ yaffs_Object *l;
++
++
++ //Scan the unlinked files looking for one to delete
++ list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ if(l->deleted)
++ {
++ return l;
++ }
++ }
++ }
++ return NULL;
++}
++
++
++static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev)
++{
++ // This does background deletion on unlinked files.. only deleted ones.
++ // If we don't have a file we're working on then find one
++ if(!dev->unlinkedDeletion && dev->nDeletedFiles > 0)
++ {
++ dev->unlinkedDeletion = yaffs_FindDeletedUnlinkedFile(dev);
++ }
++
++ // OK, we're working on a file...
++ if(dev->unlinkedDeletion)
++ {
++ yaffs_Object *obj = dev->unlinkedDeletion;
++ int delresult;
++ int limit; // Number of chunks to delete in a file.
++ // NB this can be exceeded, but not by much.
++
++ limit = -1;
++
++ delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit);
++
++ if(obj->nDataChunks == 0)
++ {
++ // Done all the deleting of data chunks.
++ // Now dump the header and clean up
++ yaffs_FreeTnode(dev,obj->variant.fileVariant.top);
++ obj->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(obj);
++ dev->nDeletedFiles--;
++ dev->nUnlinkedFiles--;
++ dev->nBackgroundDeletions++;
++ dev->unlinkedDeletion = NULL;
++ }
++ }
++}
++
++#endif
++
++
++
++// 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 dirtier blocks.
++// Passive gc only inspects smaller areas and will only accept cleaner 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;
++
++ //yaffs_VerifyFreeChunks(dev);
++
++ if(dev->isDoingGC)
++ {
++ // Bail out so we don't get recursive gc
++ return YAFFS_OK;
++ }
++
++ // This loop should pass the first time.
++ // We'll only see looping here if the erase of the collected block fails.
++
++ do{
++ maxTries++;
++ if(dev->nErasedBlocks < dev->nReservedBlocks)
++ {
++ // We need a block soon...
++ aggressive = 1;
++ }
++ else
++ {
++ // We're in no hurry
++ aggressive = 0;
++ }
++
++ block = yaffs_FindBlockForGarbageCollection(dev,aggressive);
++
++ if(block > 0)
++ {
++ dev->garbageCollections++;
++ if(!aggressive)
++ {
++ dev->passiveGarbageCollections++;
++ }
++
++ T(YAFFS_TRACE_GC,(TSTR("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),dev->nErasedBlocks,aggressive));
++
++ gcOk = yaffs_GarbageCollectBlock(dev,block);
++ }
++
++ 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));
++ }
++ } while((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) && (maxTries < 2));
++
++ return aggressive ? gcOk: YAFFS_OK;
++}
++
++
++//////////////////////////// TAGS ///////////////////////////////////////
++
++
++
++#if 0
++
++void yaffs_CalcTagsECC(yaffs_Tags *tags)
++{
++ // Calculate an ecc
++
++ unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
++ unsigned i,j;
++ unsigned ecc = 0;
++ unsigned bit = 0;
++
++ tags->ecc = 0;
++
++ for(i = 0; i < 8; i++)
++ {
++ for(j = 1; j &0xff; j<<=1)
++ {
++ bit++;
++ if(b[i] & j)
++ {
++ ecc ^= bit;
++ }
++ }
++ }
++
++ tags->ecc = ecc;
++
++
++}
++
++int yaffs_CheckECCOnTags(yaffs_Tags *tags)
++{
++ unsigned ecc = tags->ecc;
++
++ yaffs_CalcTagsECC(tags);
++
++ ecc ^= tags->ecc;
++
++ if(ecc && ecc <= 64)
++ {
++ // TODO: Handle the failure better. Retire?
++ unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
++
++ ecc--;
++
++ b[ecc / 8] ^= (1 << (ecc & 7));
++
++ // Now recvalc the ecc
++ yaffs_CalcTagsECC(tags);
++
++ return 1; // recovered error
++ }
++ else if(ecc)
++ {
++ // Wierd ecc failure value
++ // TODO Need to do somethiong here
++ return -1; //unrecovered error
++ }
++
++ return 0;
++}
++
++static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
++
++ yaffs_CalcTagsECC(tagsPtr);
++
++ sparePtr->tagByte0 = tu->asBytes[0];
++ sparePtr->tagByte1 = tu->asBytes[1];
++ sparePtr->tagByte2 = tu->asBytes[2];
++ sparePtr->tagByte3 = tu->asBytes[3];
++ sparePtr->tagByte4 = tu->asBytes[4];
++ sparePtr->tagByte5 = tu->asBytes[5];
++ sparePtr->tagByte6 = tu->asBytes[6];
++ sparePtr->tagByte7 = tu->asBytes[7];
++}
++
++static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
++ int result;
++
++ tu->asBytes[0]= sparePtr->tagByte0;
++ tu->asBytes[1]= sparePtr->tagByte1;
++ tu->asBytes[2]= sparePtr->tagByte2;
++ tu->asBytes[3]= sparePtr->tagByte3;
++ tu->asBytes[4]= sparePtr->tagByte4;
++ tu->asBytes[5]= sparePtr->tagByte5;
++ tu->asBytes[6]= sparePtr->tagByte6;
++ tu->asBytes[7]= sparePtr->tagByte7;
++
++ result = yaffs_CheckECCOnTags(tagsPtr);
++ if(result> 0)
++ {
++ dev->tagsEccFixed++;
++ }
++ else if(result <0)
++ {
++ dev->tagsEccUnfixed++;
++ }
++}
++
++static void yaffs_SpareInitialise(yaffs_Spare *spare)
++{
++ memset(spare,0xFF,sizeof(yaffs_Spare));
++}
++
++#endif
++
++#if 0
++static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve)
++{
++ // NB There must be tags, data is optional
++ // If there is data, then an ECC is calculated on it.
++
++ yaffs_Spare spare;
++
++ if(!tags)
++ {
++ return YAFFS_FAIL;
++ }
++
++ //yaffs_SpareInitialise(&spare);
++
++ //if(!dev->useNANDECC && buffer)
++ //{
++ // yaffs_CalcECC(buffer,&spare);
++ //}
++
++ //yaffs_LoadTagsIntoSpare(&spare,tags);
++
++ return yaffs_WriteNewChunkToNAND(dev,buffer,&spare,useReserve);
++
++}
++#endif
++
++static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject)
++{
++ return ( tags->chunkId == chunkInObject &&
++ tags->objectId == objectId &&
++ !tags->chunkDeleted) ? 1 : 0;
++
++}
++
++/////////////////////////////////////////////////////////////////////////////////////////////////////////
++
++
++static int yaffs_FindChunkInFile(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;
++ int retVal = -1;
++
++ 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);
++
++ if(tn)
++ {
++ theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
++
++ retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
++ }
++ return retVal;
++}
++
++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;
++
++ yaffs_Device *dev = in->myDev;
++ int retVal = -1;
++
++ if(!tags)
++ {
++ // Passed a NULL, so use our own tags space
++ tags = &localTags;
++ }
++
++ tn = yaffs_FindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
++
++ if(tn)
++ {
++
++ theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
++
++ retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
++
++ // Delete the entry in the filestructure (if found)
++ if(retVal != -1)
++ {
++ tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
++ }
++ }
++ else
++ {
++ //T(("No level 0 found for %d\n", chunkInInode));
++ }
++
++ if(retVal == -1)
++ {
++ //T(("Could not find %d to delete\n",chunkInInode));
++ }
++ return retVal;
++}
++
++
++#ifdef YAFFS_PARANOID
++
++static int yaffs_CheckFileSanity(yaffs_Object *in)
++{
++ int chunk;
++ int nChunks;
++ int fSize;
++ int failed = 0;
++ int objId;
++ yaffs_Tnode *tn;
++ yaffs_Tags localTags;
++ yaffs_Tags *tags = &localTags;
++ int theChunk;
++ int chunkDeleted;
++
++
++ if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
++ {
++ //T(("Object not a file\n"));
++ return YAFFS_FAIL;
++ }
++
++ objId = in->objectId;
++ fSize = in->variant.fileVariant.fileSize;
++ nChunks = (fSize + in->myDev->nBytesPerChunk -1)/in->myDev->nBytesPerChunk;
++
++ for(chunk = 1; chunk <= nChunks; chunk++)
++ {
++ tn = yaffs_FindLevel0Tnode(in->myDev,&in->variant.fileVariant, chunk);
++
++ if(tn)
++ {
++
++ theChunk = tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->myDev->chunkGroupBits;
++
++ 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;
++
++ }
++ }
++ else
++ {
++ //T(("File problem file [%d,%d] NAND %d tags[%d,%d]\n",
++ // objId,chunk,theChunk,tags->chunkId,tags->objectId);
++
++ failed = 1;
++
++ }
++
++ }
++ else
++ {
++ //T(("No level 0 found for %d\n", chunk));
++ }
++ }
++
++ return failed ? YAFFS_FAIL : YAFFS_OK;
++}
++
++#endif
++
++static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan)
++{
++ // NB inScan is zero unless scanning. For forward scanning, inScan is > 0; for backward scanning inScan is < 0
++ yaffs_Tnode *tn;
++ yaffs_Device *dev = in->myDev;
++ int existingChunk;
++ yaffs_ExtendedTags existingTags;
++ yaffs_ExtendedTags newTags;
++ unsigned existingSerial, newSerial;
++
++ 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();
++ }
++
++ yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
++ return YAFFS_OK;
++ }
++
++ tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
++ if(!tn)
++ {
++ return YAFFS_FAIL;
++ }
++
++ existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
++
++ 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.
++
++
++
++ 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);
++
++
++ // Do a proper find
++ existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags);
++ }
++
++ if(existingChunk <=0)
++ {
++ //Hoosterman - how did this happen?
++
++ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: existing chunk < 0 in scan" TENDSTR)));
++
++ }
++
++
++ // NB The deleted flags should be false, otherwise the chunks will
++ // not be loaded during a scan
++
++ newSerial = newTags.serialNumber;
++ existingSerial = existingTags.serialNumber;
++
++ 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(existingChunk == 0)
++ {
++ in->nDataChunks++;
++ }
++
++ tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = (chunkInNAND >> dev->chunkGroupBits);
++
++ 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));
++
++ memset(buffer,0,in->myDev->nBytesPerChunk); // get sane data if you read a hole
++ return 0;
++ }
++
++}
++
++
++void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND,int lyn)
++{
++ int block;
++ int page;
++ yaffs_ExtendedTags tags;
++ yaffs_BlockInfo *bi;
++
++ if(chunkId <= 0) return;
++
++ dev->nDeletions++;
++ block = chunkId / dev->nChunksPerBlock;
++ page = chunkId % dev->nChunksPerBlock;
++
++ bi = yaffs_GetBlockInfo(dev,block);
++
++ T(YAFFS_TRACE_DELETION,(TSTR("line %d delete of chunk %d" TENDSTR),lyn,chunkId));
++
++ if(markNAND &&
++ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
++ !dev->isYaffs2)
++ {
++// yaffs_SpareInitialise(&spare);
++
++#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
++
++ //read data before write, to ensure correct ecc
++ //if we're using MTD verification under Linux
++// yaffs_ReadChunkFromNAND(dev,chunkId,NULL,&spare,0);
++#endif
++
++ yaffs_InitialiseTags(&tags);
++
++ tags.chunkDeleted = 1;
++
++
++ yaffs_WriteChunkWithTagsToNAND(dev,chunkId,NULL,&tags);
++ yaffs_HandleUpdateChunk(dev,chunkId,&tags);
++ }
++ else
++ {
++ dev->nUnmarkedDeletions++;
++ }
++
++
++ // 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++;
++
++ yaffs_ClearChunkBit(dev,block,page);
++
++ bi->pagesInUse--;
++
++ if(bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
++ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++ yaffs_BlockBecameDirty(dev,block);
++ }
++
++ }
++ else
++ {
++ // T(("Bad news deleting chunk %d\n",chunkId));
++ }
++
++}
++
++
++
++
++static int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 *buffer,int nBytes,int useReserve)
++{
++ // Find old chunk Need to do this to get serial number
++ // Write new one and patch into tree.
++ // Invalidate old tags.
++
++ int prevChunkId;
++ yaffs_ExtendedTags prevTags;
++
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
++
++ yaffs_Device *dev = in->myDev;
++
++ yaffs_CheckGarbageCollection(dev);
++
++ // Get the previous chunk at this location in the file if it exists
++ prevChunkId = yaffs_FindChunkInFile(in,chunkInInode,&prevTags);
++
++ // 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;
++
++// yaffs_CalcTagsECC(&newTags);
++
++ newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve);
++
++ if(newChunkId >= 0)
++ {
++ yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId,0);
++
++
++ if(prevChunkId >= 0)
++ {
++ yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
++
++ }
++
++ yaffs_CheckFileSanity(in);
++ }
++ return newChunkId;
++
++
++
++
++
++}
++
++
++// 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)
++{
++
++ yaffs_BlockInfo *bi;
++
++ yaffs_Device *dev = in->myDev;
++
++ int prevChunkId;
++ int retVal = 0;
++
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
++
++ __u8 *buffer = NULL;
++ YCHAR oldName[YAFFS_MAX_NAME_LENGTH+1];
++
++ // __u8 bufferOld[YAFFS_BYTES_PER_CHUNK];
++
++ yaffs_ObjectHeader *oh = NULL;
++ // yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld;
++
++
++ if(!in->fake || force)
++ {
++
++ yaffs_CheckGarbageCollection(dev);
++
++ buffer = yaffs_GetTempBuffer(in->myDev,__LINE__);
++ oh = (yaffs_ObjectHeader *)buffer;
++
++ prevChunkId = in->chunkId;
++
++ if(prevChunkId >= 0)
++ {
++ yaffs_ReadChunkWithTagsFromNAND(dev,prevChunkId,buffer,NULL);
++ memcpy(oldName,oh->name,sizeof(oh->name));
++ }
++
++ memset(buffer,0xFF,dev->nBytesPerChunk);
++
++ // Header data
++ oh->type = in->variantType;
++
++ oh->yst_mode = in->yst_mode;
++
++ // shadowing
++ oh->shadowsObject = shadows;
++
++#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;
++ }
++
++ //oh->sum = in->sum;
++ if(name && *name)
++ {
++ memset(oh->name,0,sizeof(oh->name));
++ yaffs_strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
++ }
++ else if(prevChunkId)
++ {
++ memcpy(oh->name, oldName,sizeof(oh->name));
++ }
++ else
++ {
++ memset(oh->name,0,sizeof(oh->name));
++ }
++
++ oh->isShrink = isShrink;
++
++ switch(in->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ // Should not happen
++ break;
++ 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
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ // Do nothing
++ 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;
++ 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;
++
++ // Create new chunk in NAND
++ newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags, (prevChunkId >= 0) ? 1 : 0 );
++
++ if(newChunkId >= 0)
++ {
++
++ in->chunkId = newChunkId;
++
++ if(prevChunkId >= 0)
++ {
++ yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
++ }
++
++ 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;
++ }
++
++ }
++
++ retVal = newChunkId;
++
++ }
++
++ if(buffer)
++ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
++
++ return retVal;
++}
++
++
++/////////////////////// Short Operations Cache ////////////////////////////////
++// In many siturations 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.
++// There are a limited number (~10) of cache chunks per device so that we don't
++// need a very intelligent search.
++
++
++
++
++
++static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
++{
++ yaffs_Device *dev = obj->myDev;
++ int lowest = -99; // Stop compiler whining.
++ int i;
++ yaffs_ChunkCache *cache;
++ int chunkWritten = 0;
++ //int nBytes;
++ int nCaches = obj->myDev->nShortOpCaches;
++
++ if (nCaches > 0)
++ {
++ do{
++ cache = NULL;
++
++ // Find the dirty cache for this object with the lowest chunk id.
++ for(i = 0; i < nCaches; i++)
++ {
++ if(dev->srCache[i].object == obj &&
++ dev->srCache[i].dirty)
++ {
++ if(!cache || dev->srCache[i].chunkId < lowest)
++ {
++ cache = &dev->srCache[i];
++ lowest = cache->chunkId;
++ }
++ }
++ }
++
++ if(cache && !cache->locked)
++ {
++ //Write it out and free it up
++
++#if 0
++ nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK);
++
++ if(nBytes > YAFFS_BYTES_PER_CHUNK)
++ {
++ nBytes= YAFFS_BYTES_PER_CHUNK;
++ }
++#endif
++ chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
++ cache->chunkId,
++ cache->data,
++ cache->nBytes,1);
++
++ cache->dirty = 0;
++ cache->object = NULL;
++ }
++
++ } while(cache && chunkWritten > 0);
++
++ if(cache)
++ {
++ //Hoosterman, disk full while writing cache out.
++ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
++
++ }
++ }
++
++}
++
++
++// Grab us a chunk for use.
++// First look for an empty one.
++// Then look for the least recently used non-dirty one.
++// Then look for the least recently used dirty one...., flush and look again.
++static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
++{
++ int i;
++ int usage;
++ int theOne;
++
++ if(dev->nShortOpCaches > 0)
++ {
++ for(i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if(!dev->srCache[i].object)
++ {
++ //T(("Grabbing empty %d\n",i));
++
++ //printf("Grabbing empty %d\n",i);
++
++ return &dev->srCache[i];
++ }
++ }
++
++ return NULL;
++
++ theOne = -1;
++ usage = 0; // just to stop the compiler grizzling
++
++ for(i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if(!dev->srCache[i].dirty &&
++ ((dev->srCache[i].lastUse < usage && theOne >= 0)||
++ theOne < 0))
++ {
++ usage = dev->srCache[i].lastUse;
++ theOne = i;
++ }
++ }
++
++ //T(("Grabbing non-empty %d\n",theOne));
++
++ //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
++
++ return theOne >= 0 ? &dev->srCache[theOne] : NULL;
++ }
++ else
++ {
++ return NULL;
++ }
++
++}
++
++
++static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
++{
++ yaffs_ChunkCache *cache;
++ yaffs_Object *theObj;
++ int usage;
++ int i;
++ int pushout;
++
++ if(dev->nShortOpCaches > 0)
++ {
++ // Try find a non-dirty one...
++
++ cache = yaffs_GrabChunkCacheWorker(dev);
++
++ if(!cache)
++ {
++ // They were all dirty, find the last recently used object and flush
++ // its cache, then find again.
++ // NB what's here is not very accurate, we actually flush the object
++ // the last recently used page.
++
++ // With locking we can't assume we can use entry zero
++
++
++ theObj = NULL;
++ usage = -1;
++ cache = NULL;
++ pushout = -1;
++
++ for(i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if( dev->srCache[i].object &&
++ !dev->srCache[i].locked &&
++ (dev->srCache[i].lastUse < usage || !cache))
++ {
++ usage = dev->srCache[i].lastUse;
++ theObj = dev->srCache[i].object;
++ cache = &dev->srCache[i];
++ pushout = i;
++ }
++ }
++
++ if(!cache || cache->dirty)
++ {
++
++ //printf("Dirty ");
++ yaffs_FlushFilesChunkCache(theObj);
++
++ // Try again
++ cache = yaffs_GrabChunkCacheWorker(dev);
++ }
++ else
++ {
++ //printf(" pushout %d\n",pushout);
++ }
++
++ }
++ return cache;
++ }
++ else
++ return NULL;
++
++}
++
++
++// Find a cached chunk
++static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId)
++{
++ yaffs_Device *dev = obj->myDev;
++ int i;
++ if(dev->nShortOpCaches > 0)
++ {
++ for(i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if(dev->srCache[i].object == obj &&
++ dev->srCache[i].chunkId == chunkId)
++ {
++ dev->cacheHits++;
++
++ return &dev->srCache[i];
++ }
++ }
++ }
++ return NULL;
++}
++
++// Mark the chunk for the least recently used algorithym
++static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, int isAWrite)
++{
++
++ if(dev->nShortOpCaches > 0)
++ {
++ if( dev->srLastUse < 0 ||
++ dev->srLastUse > 100000000)
++ {
++ // Reset the cache usages
++ int i;
++ for(i = 1; i < dev->nShortOpCaches; i++)
++ {
++ dev->srCache[i].lastUse = 0;
++ }
++ dev->srLastUse = 0;
++ }
++
++ dev->srLastUse++;
++
++ cache->lastUse = dev->srLastUse;
++
++ if(isAWrite)
++ {
++ cache->dirty = 1;
++ }
++ }
++}
++
++// Invalidate a single cache page.
++// Do this when a whole page gets written,
++// ie the short cache for this page is no longer valid.
++static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
++{
++ if(object->myDev->nShortOpCaches > 0)
++ {
++ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object,chunkId);
++
++ if(cache)
++ {
++ cache->object = NULL;
++ }
++ }
++}
++
++
++// Invalidate all the cache pages associated with this object
++// Do this whenever ther file is deleted or resized.
++static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
++{
++ int i;
++ yaffs_Device *dev = in->myDev;
++
++ if(dev->nShortOpCaches > 0)
++ {
++ // Now invalidate it.
++ for(i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if(dev->srCache[i].object == in)
++ {
++ dev->srCache[i].object = NULL;
++ }
++ }
++ }
++}
++
++
++
++
++
++///////////////////////// File read/write ///////////////////////////////
++// Read and write have very similar structures.
++// In general the read/write has three parts to it
++// * An incomplete chunk to start with (if the read/write is not chunk-aligned)
++// * Some complete chunks
++// * An incomplete chunk to end off with
++//
++// Curve-balls: the first chunk might also be the last chunk.
++
++int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nBytes)
++{
++
++
++ int chunk;
++ int start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ yaffs_ChunkCache *cache;
++
++ yaffs_Device *dev;
++
++ dev = in->myDev;
++
++ while(n > 0)
++ {
++ chunk = offset / dev->nBytesPerChunk + 1; // The first chunk is 1
++ start = offset % dev->nBytesPerChunk;
++
++ // OK now check for the curveball where the start and end are in
++ // the same chunk.
++ if( (start + n) < dev->nBytesPerChunk)
++ {
++ nToCopy = n;
++ }
++ else
++ {
++ nToCopy = dev->nBytesPerChunk - start;
++ }
++
++ cache = yaffs_FindChunkCache(in,chunk);
++
++ // If the chunk is already in the cache or it is less than a whole chunk
++ // then use the cache (if there is caching)
++ // else bypass the cache.
++ if( cache || nToCopy != dev->nBytesPerChunk)
++ {
++ if(dev->nShortOpCaches > 0)
++ {
++
++ // If we can't find the data in the cache, then load it up.
++
++ if(!cache)
++ {
++ cache = yaffs_GrabChunkCache(in->myDev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
++ cache->nBytes = 0;
++ }
++
++ yaffs_UseChunkCache(dev,cache,0);
++
++ cache->locked = 1;
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++ memcpy(buffer,&cache->data[start],nToCopy);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++#endif
++ cache->locked = 0;
++ }
++ else
++ {
++ // Read into the local buffer then copy...
++
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
++ yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++ memcpy(buffer,&localBuffer[start],nToCopy);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++#endif
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++ }
++
++ }
++ else
++ {
++#ifdef CONFIG_YAFFS_WINCE
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
++
++ // Under WinCE can't do direct transfer. Need to use a local buffer.
++ // This is because we otherwise screw up WinCE's memory mapper
++ yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++ memcpy(buffer,localBuffer,dev->nBytesPerChunk);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++#endif
++
++#else
++ // A full chunk. Read directly into the supplied buffer.
++ yaffs_ReadChunkDataFromObject(in,chunk,buffer);
++#endif
++ }
++
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
++
++ }
++
++ return nDone;
++}
++
++
++
++int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes, int writeThrough)
++{
++
++ int chunk;
++ int start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ int nToWriteBack;
++ int startOfWrite = offset;
++ int chunkWritten = 0;
++ int nBytesRead;
++
++ yaffs_Device *dev;
++
++ dev = in->myDev;
++
++
++ while(n > 0 && chunkWritten >= 0)
++ {
++ chunk = offset / dev->nBytesPerChunk + 1;
++ start = offset % dev->nBytesPerChunk;
++
++
++ // OK now check for the curveball where the start and end are in
++ // the same chunk.
++
++ if((start + n) < dev->nBytesPerChunk)
++ {
++ nToCopy = n;
++
++ // Now folks, to calculate how many bytes to write back....
++ // If we're overwriting and not writing to then end of file then
++ // we need to write back as much as was there before.
++
++ nBytesRead = in->variant.fileVariant.fileSize - ((chunk -1) * dev->nBytesPerChunk);
++
++ if(nBytesRead > dev->nBytesPerChunk)
++ {
++ nBytesRead = dev->nBytesPerChunk;
++ }
++
++ nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n);
++
++ }
++ else
++ {
++ nToCopy = dev->nBytesPerChunk - start;
++ nToWriteBack = dev->nBytesPerChunk;
++ }
++
++ if(nToCopy != dev->nBytesPerChunk)
++ {
++ // An incomplete start or end chunk (or maybe both start and end chunk)
++ if(dev->nShortOpCaches > 0)
++ {
++ yaffs_ChunkCache *cache;
++ // If we can't find the data in the cache, then load it up.
++ cache = yaffs_FindChunkCache(in,chunk);
++ if(!cache && yaffs_CheckSpaceForAllocation(in->myDev))
++ {
++ cache = yaffs_GrabChunkCache(in->myDev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
++ }
++
++ if(cache)
++ {
++ yaffs_UseChunkCache(dev,cache,1);
++ cache->locked = 1;
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++
++ memcpy(&cache->data[start],buffer,nToCopy);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++#endif
++ cache->locked = 0;
++ cache->nBytes = nToWriteBack;
++
++ if(writeThrough)
++ {
++ chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
++ cache->chunkId,
++ cache->data,
++ cache->nBytes,1);
++ cache->dirty = 0;
++ }
++
++ }
++ else
++ {
++ chunkWritten = -1; // fail the write
++ }
++ }
++ else
++ {
++ // An incomplete start or end chunk (or maybe both start and end chunk)
++ // Read into the local buffer then copy, then copy over and write back.
++
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
++
++ yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++
++ memcpy(&localBuffer[start],buffer,nToCopy);
++
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++#endif
++ chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,nToWriteBack,0);
++
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++
++ //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack));
++ }
++
++ }
++ else
++ {
++
++#ifdef CONFIG_YAFFS_WINCE
++ // Under WinCE can't do direct transfer. Need to use a local buffer.
++ // This is because we otherwise screw up WinCE's memory mapper
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_UnlockYAFFS(TRUE);
++#endif
++ memcpy(localBuffer,buffer,dev->nBytesPerChunk);
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_LockYAFFS(TRUE);
++#endif
++ chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,dev->nBytesPerChunk,0);
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++#else
++ // A full chunk. Write directly from the supplied buffer.
++ chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,dev->nBytesPerChunk,0);
++#endif
++ // Since we've overwritten the cached data, we better invalidate it.
++ yaffs_InvalidateChunkCache(in,chunk);
++ //T(("Write to chunk %d %d\n",chunk,chunkWritten));
++ }
++
++ if(chunkWritten >= 0)
++ {
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
++ }
++
++ }
++
++ // Update file object
++
++ if((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
++ {
++ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
++ }
++
++ in->dirty = 1;
++
++ return nDone;
++}
++
++static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
++{
++
++ yaffs_Device *dev = in->myDev;
++ int oldFileSize = in->variant.fileVariant.fileSize;
++
++
++ int lastDel = 1 + (oldFileSize-1)/dev->nBytesPerChunk;
++
++ int startDel = 1 + (newSize + dev->nBytesPerChunk - 1)/
++ dev->nBytesPerChunk;
++ int i;
++ int chunkId;
++
++ // Delete backwards so that we don't end up with holes if
++ // power is lost part-way through the operation.
++ for(i = lastDel; i >= startDel; i--)
++ {
++ // NB this could be optimised somewhat,
++ // eg. could retrieve the tags and write them without
++ // using yaffs_DeleteChunk
++
++ chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
++ if(chunkId > 0)
++ {
++ if(chunkId < (dev->internalStartBlock * dev->nChunksPerBlock) ||
++ chunkId >= ((dev->internalEndBlock+1) * dev->nChunksPerBlock))
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("Found daft chunkId %d for %d"TENDSTR),chunkId,i));
++ }
++ else
++ {
++ in->nDataChunks--;
++ yaffs_DeleteChunk(dev,chunkId,1,__LINE__);
++ }
++ }
++ }
++
++}
++
++int yaffs_ResizeFile(yaffs_Object *in, int newSize)
++{
++
++ int oldFileSize = in->variant.fileVariant.fileSize;
++ int sizeOfPartialChunk;
++ yaffs_Device *dev = in->myDev;
++
++ sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
++
++
++ yaffs_FlushFilesChunkCache(in);
++ yaffs_InvalidateWholeChunkCache(in);
++
++ yaffs_CheckGarbageCollection(dev);
++
++ if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
++ {
++ return yaffs_GetFileSize(in);
++ }
++
++ if(newSize < oldFileSize)
++ {
++
++ yaffs_PruneResizedChunks(in,newSize);
++
++ if(sizeOfPartialChunk != 0)
++ {
++ int lastChunk = 1+ newSize/dev->nBytesPerChunk;
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
++
++ // Got to read and rewrite the last chunk with its new size and zero pad
++ yaffs_ReadChunkDataFromObject(in,lastChunk,localBuffer);
++
++ memset(localBuffer + sizeOfPartialChunk,0, dev->nBytesPerChunk - sizeOfPartialChunk);
++
++ yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfPartialChunk,1);
++
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++ }
++
++ in->variant.fileVariant.fileSize = newSize;
++
++ yaffs_PruneFileStructure(dev,&in->variant.fileVariant);
++
++ // Write a new object header to show we've shrunk the file
++ // Do this only if the file is not in the deleted directories.
++ if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
++ in->parent->objectId != YAFFS_OBJECTID_DELETED
++ )
++ {
++ yaffs_UpdateObjectHeader(in,NULL, 0, 1,0);
++ }
++
++
++ return newSize;
++
++ }
++ else
++ {
++ return oldFileSize;
++ }
++}
++
++
++loff_t yaffs_GetFileSize(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ switch(obj->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return obj->variant.fileVariant.fileSize;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return yaffs_strlen(obj->variant.symLinkVariant.alias);
++ default:
++ return 0;
++ }
++}
++
++
++
++// yaffs_FlushFile() updates the file's
++// objectId in NAND
++
++int yaffs_FlushFile(yaffs_Object *in, int updateTime)
++{
++ int retVal;
++ if(in->dirty)
++ {
++ //T(("flushing object header\n"));
++
++ yaffs_FlushFilesChunkCache(in);
++ if(updateTime)
++ {
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(in->win_mtime);
++#else
++
++ in->yst_mtime = Y_CURRENT_TIME;
++
++#endif
++ }
++
++ retVal = (yaffs_UpdateObjectHeader(in,NULL,0,0,0) >= 0)? YAFFS_OK : YAFFS_FAIL;
++ }
++ else
++ {
++ retVal = YAFFS_OK;
++ }
++
++ return retVal;
++
++}
++
++
++static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
++{
++
++ // First off, invalidate the file's data in the cache, without flushing.
++ yaffs_InvalidateWholeChunkCache(in);
++
++ if(in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir))
++ {
++ // Move to the unlinked directory so we have a record that it was deleted.
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0,0);
++
++ }
++
++
++ yaffs_RemoveObjectFromDirectory(in);
++ yaffs_DeleteChunk(in->myDev,in->chunkId,1,__LINE__);
++ in->chunkId = -1;
++#if 0
++#ifdef __KERNEL__
++ if(in->myInode)
++ {
++ in->myInode->u.generic_ip = NULL;
++ in->myInode = 0;
++ }
++#endif
++#endif
++
++ yaffs_FreeObject(in);
++ return YAFFS_OK;
++
++}
++
++// yaffs_DeleteFile deletes the whole file data
++// and the inode associated with the file.
++// It does not delete the links associated with the file.
++static int yaffs_UnlinkFile(yaffs_Object *in)
++{
++
++#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION
++
++ // Delete the file data & tnodes
++
++ yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL);
++
++
++ yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
++
++ return yaffs_DoGenericObjectDeletion(in);
++#else
++ int retVal;
++ int immediateDeletion=0;
++
++ if(1)
++ {
++ //in->unlinked = 1;
++ //in->myDev->nUnlinkedFiles++;
++ //in->renameAllowed = 0;
++#ifdef __KERNEL__
++ if(!in->myInode)
++ {
++ immediateDeletion = 1;
++
++ }
++#else
++ if(in->inUse <= 0)
++ {
++ immediateDeletion = 1;
++
++ }
++#endif
++ if(immediateDeletion)
++ {
++ retVal = yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0,0);
++ T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId));
++ in->deleted=1;
++ in->myDev->nDeletedFiles++;
++ if( 0 && in->myDev->isYaffs2)
++ {
++ yaffs_ResizeFile(in,0);
++ }
++ yaffs_SoftDeleteFile(in);
++ }
++ else
++ {
++ retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0,0);
++ }
++
++ }
++ return retVal;
++
++
++#endif
++}
++
++int yaffs_DeleteFile(yaffs_Object *in)
++{
++ int retVal = YAFFS_OK;
++
++ if(in->nDataChunks > 0)
++ {
++ // Use soft deletion
++ if(!in->unlinked)
++ {
++ retVal = yaffs_UnlinkFile(in);
++ }
++ if(retVal == YAFFS_OK &&
++ in->unlinked &&
++ !in->deleted)
++ {
++ in->deleted = 1;
++ in->myDev->nDeletedFiles++;
++ yaffs_SoftDeleteFile(in);
++ }
++ return in->deleted ? YAFFS_OK : YAFFS_FAIL;
++ }
++ else
++ {
++ // The file has no data chunks so we toss it immediately
++ yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
++ in->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(in);
++
++ return YAFFS_OK;
++ }
++}
++
++static int yaffs_DeleteDirectory(yaffs_Object *in)
++{
++ //First check that the directory is empty.
++ if(list_empty(&in->variant.directoryVariant.children))
++ {
++ return yaffs_DoGenericObjectDeletion(in);
++ }
++
++ return YAFFS_FAIL;
++
++}
++
++static int yaffs_DeleteSymLink(yaffs_Object *in)
++{
++ YFREE(in->variant.symLinkVariant.alias);
++
++ return yaffs_DoGenericObjectDeletion(in);
++}
++
++static int yaffs_DeleteHardLink(yaffs_Object *in)
++{
++ // remove this hardlink from the list assocaited with the equivalent
++ // object
++ list_del(&in->hardLinks);
++ return yaffs_DoGenericObjectDeletion(in);
++}
++
++
++static void yaffs_DestroyObject(yaffs_Object *obj)
++{
++ switch(obj->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_FILE: yaffs_DeleteFile(obj); break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY: yaffs_DeleteDirectory(obj); break;
++ case YAFFS_OBJECT_TYPE_SYMLINK: yaffs_DeleteSymLink(obj); break;
++ case YAFFS_OBJECT_TYPE_HARDLINK: yaffs_DeleteHardLink(obj); break;
++ case YAFFS_OBJECT_TYPE_SPECIAL: yaffs_DoGenericObjectDeletion(obj); break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN: break; // should not happen.
++ }
++}
++
++
++static int yaffs_UnlinkWorker(yaffs_Object *obj)
++{
++
++
++ if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ {
++ return yaffs_DeleteHardLink(obj);
++ }
++ else if(!list_empty(&obj->hardLinks))
++ {
++ // Curve ball: We're unlinking an object that has a hardlink.
++ //
++ // This problem arises because we are not strictly following
++ // The Linux link/inode model.
++ //
++ // We can't really delete the object.
++ // Instead, we do the following:
++ // - Select a hardlink.
++ // - Unhook it from the hard links
++ // - Unhook it from its parent directory (so that the rename can work)
++ // - Rename the object to the hardlink's name.
++ // - Delete the hardlink
++
++
++ yaffs_Object *hl;
++ int retVal;
++ YCHAR name[YAFFS_MAX_NAME_LENGTH+1];
++
++ hl = list_entry(obj->hardLinks.next,yaffs_Object,hardLinks);
++
++ list_del_init(&hl->hardLinks);
++ list_del_init(&hl->siblings);
++
++ yaffs_GetObjectName(hl,name,YAFFS_MAX_NAME_LENGTH+1);
++
++ retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0,0);
++
++ if(retVal == YAFFS_OK)
++ {
++ retVal = yaffs_DoGenericObjectDeletion(hl);
++ }
++ return retVal;
++
++ }
++ else
++ {
++ switch(obj->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return yaffs_UnlinkFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ return yaffs_DeleteDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return yaffs_DeleteSymLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ return yaffs_DoGenericObjectDeletion(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ return YAFFS_FAIL;
++ }
++ }
++}
++
++int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
++{
++ yaffs_Object *obj;
++
++ obj = yaffs_FindObjectByName(dir,name);
++
++ if(obj && obj->unlinkAllowed)
++ {
++ return yaffs_UnlinkWorker(obj);
++ }
++
++ return YAFFS_FAIL;
++
++}
++
++//////////////// Initialisation Scanning /////////////////
++
++
++void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, int backwardScanning)
++{
++ //Todo
++}
++
++#if 0
++// For now we use the SmartMedia check.
++// We look at the blockStatus byte in the first two chunks
++// These must be 0xFF to pass as OK.
++// todo: this function needs to be modifyable foir different NAND types
++// and different chunk sizes. Suggest make this into a per-device configurable
++// function.
++static int yaffs_IsBlockBad(yaffs_Device *dev, int blk)
++{
++ yaffsExtendedTags *tags;
++
++ yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock,NULL,&tags,1);
++#if 1
++ if(yaffs_CountBits(spare.blockStatus) < 7)
++ {
++ return 1;
++ }
++#else
++ if(spare.blockStatus != 0xFF)
++ {
++ return 1;
++ }
++#endif
++ yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock + 1,NULL,&spare,1);
++
++#if 1
++ if(yaffs_CountBits(spare.blockStatus) < 7)
++ {
++ return 1;
++ }
++#else
++ if(spare.blockStatus != 0xFF)
++ {
++ return 1;
++ }
++#endif
++
++ return 0;
++
++}
++
++#endif
++
++
++typedef struct
++{
++ int seq;
++ int block;
++} yaffs_BlockIndex;
++
++
++
++static int yaffs_Scan(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int nBlocksToScan = 0;
++
++ int chunk;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_Object *hl;
++ yaffs_BlockInfo *bi;
++ int sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++
++ __u8 *chunkData;
++
++ yaffs_BlockIndex *blockIndex = NULL;
++
++ T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock));
++
++ chunkData = yaffs_GetTempBuffer(dev,__LINE__);
++
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ if(dev->isYaffs2)
++ {
++ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++ }
++
++
++ // Scan all the blocks to determine their state
++ for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++)
++ {
++ bi = yaffs_GetBlockInfo(dev,blk);
++ yaffs_ClearChunkBits(dev,blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
++
++ if(state == YAFFS_BLOCK_STATE_DEAD)
++ {
++ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
++ }
++ else if(state == YAFFS_BLOCK_STATE_EMPTY)
++ {
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ }
++ else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++
++ // Determine the highest sequence number
++ if( dev->isYaffs2 &&
++ sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
++ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
++ {
++
++ blockIndex[nBlocksToScan].seq = sequenceNumber;
++ blockIndex[nBlocksToScan].block = blk;
++
++ nBlocksToScan++;
++
++ if(sequenceNumber >= dev->sequenceNumber)
++ {
++ dev->sequenceNumber = sequenceNumber;
++ }
++ }
++ else if(dev->isYaffs2)
++ {
++ // TODO: Nasty sequence number!
++ T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
++
++ }
++ }
++ }
++
++ // Sort the blocks
++ // Dungy old bubble sort for now...
++ if(dev->isYaffs2)
++ {
++ yaffs_BlockIndex temp;
++ int i;
++ int j;
++
++ for(i = 0; i < nBlocksToScan; i++)
++ for(j = i+1; j < nBlocksToScan; j++)
++ if(blockIndex[i].seq > blockIndex[j].seq)
++ {
++ temp = blockIndex[j];
++ blockIndex[j] = blockIndex[i];
++ blockIndex[i] = temp;
++ }
++ }
++
++
++ // Now scan the blocks looking at the data.
++ if(dev->isYaffs2)
++ {
++ startIterator = 0;
++ endIterator = nBlocksToScan-1;
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
++ }
++ else
++ {
++ startIterator = dev->internalStartBlock;
++ endIterator = dev->internalEndBlock;
++ }
++
++ // For each block....
++ for(blockIterator = startIterator; blockIterator <= endIterator; blockIterator++)
++ {
++
++ if(dev->isYaffs2)
++ {
++ // get the block to scan in the correct order
++ blk = blockIndex[blockIterator].block;
++ }
++ else
++ {
++ blk = blockIterator;
++ }
++
++
++ bi = yaffs_GetBlockInfo(dev,blk);
++ state = bi->blockState;
++
++ deleted = 0;
++
++ // For each chunk in each block that needs scanning....
++ for(c = 0; c < dev->nChunksPerBlock &&
++ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++)
++ {
++ // Read the tags and decide what to do
++ chunk = blk * dev->nChunksPerBlock + c;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
++
++ // Let's have a good look at this chunk...
++
++
++ if(!dev->isYaffs2 && tags.chunkDeleted)
++ {
++ // YAFFS1 only...
++ // A deleted chunk
++ deleted++;
++ dev->nFreeChunks ++;
++ //T((" %d %d deleted\n",blk,c));
++ }
++ else if(!tags.chunkUsed)
++ {
++ // An unassigned chunk in the block
++ // This means that either the block is empty or
++ // this is the one being allocated from
++
++ if(c == 0)
++ {
++ // We're looking at the first chunk in the block so the block is unused
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ }
++ else
++ {
++ // this is the block being allocated from
++ T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
++ // go forth from here.
++ //Yaffs2 sanity check:
++ // This should be the one with the highest sequence number
++ if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
++ {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
++ blk,bi->sequenceNumber,dev->sequenceNumber));
++ }
++ }
++
++ dev->nFreeChunks += (dev->nChunksPerBlock - c);
++ }
++ else if(tags.chunkId > 0)
++ {
++ // chunkId > 0 so it is a data chunk...
++ unsigned int endpos;
++
++ yaffs_SetChunkBit(dev,blk,c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
++ // PutChunkIntoFile checks for a clash (two data chunks with
++ // the same chunkId).
++ yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
++ endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
++ if(in->variantType == YAFFS_OBJECT_TYPE_FILE && in->variant.fileVariant.scannedFileSize <endpos)
++ {
++ in->variant.fileVariant.scannedFileSize = endpos;
++ if(!dev->useHeaderFileSize)
++ {
++ in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
++ }
++
++ }
++ //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
++ }
++ else
++ {
++ // chunkId == 0, so it is an ObjectHeader.
++ // Thus, we read in the object header and make the object
++ yaffs_SetChunkBit(dev,blk,c);
++ bi->pagesInUse++;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
++
++ oh = (yaffs_ObjectHeader *)chunkData;
++
++ in = yaffs_FindObjectByNumber(dev,tags.objectId);
++ if(in && in->variantType != oh->type)
++ {
++ // This should not happen, but somehow
++ // Wev'e ended up with an objectId that has been reused but not yet
++ // deleted, and worse still it has changed type. Delete the old object.
++
++ yaffs_DestroyObject(in);
++
++ in = 0;
++ }
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
++
++ if(oh->shadowsObject > 0)
++ {
++ yaffs_HandleShadowedObject(dev,oh->shadowsObject,0);
++ }
++
++ if(in->valid)
++ {
++ // We have already filled this one. We have a duplicate and need to resolve it.
++
++ unsigned existingSerial = in->serial;
++ unsigned newSerial = tags.serialNumber;
++
++ if( dev->isYaffs2 ||
++ ((existingSerial+1) & 3) == newSerial)
++ {
++ // Use new one - destroy the exisiting one
++ yaffs_DeleteChunk(dev,in->chunkId,1,__LINE__);
++ in->valid = 0;
++ }
++ else
++ {
++ // Use existing - destroy this one.
++ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
++ }
++ }
++
++ if(!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
++ {
++ // We only load some info, don't fiddle with directory structure
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->chunkId = chunk;
++
++ }
++ else if(!in->valid)
++ {
++ // we need to load this info
++
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->chunkId = chunk;
++
++ yaffs_SetObjectName(in,oh->name);
++ in->dirty = 0;
++
++ // directory stuff...
++ // hook up to parent
++
++ parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
++ if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
++ {
++ // Set up as a directory
++ parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
++ INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
++ }
++ else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ {
++ // Hoosterman, another problem....
++ // We're trying to use a non-directory as a directory
++
++ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent,in);
++
++ if(0 && (parent == dev->deletedDir ||
++ parent == dev->unlinkedDir))
++ {
++ in->deleted = 1; // If it is unlinked at start up then it wants deleting
++ dev->nDeletedFiles++;
++ }
++
++ // Note re hardlinks.
++ // Since we might scan a hardlink before its equivalent object is scanned
++ // we put them all in a list.
++ // After scanning is complete, we should have all the objects, so we run through this
++ // list and fix up all the chains.
++
++ switch(in->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ if(dev->isYaffs2 && oh->isShrink)
++ {
++ // Prune back the shrunken chunks
++ yaffs_PruneResizedChunks(in,oh->fileSize);
++ // Mark the block as having a shrinkHeader
++ bi->hasShrinkHeader = 1;
++ }
++
++ if(dev->useHeaderFileSize)
++
++ in->variant.fileVariant.fileSize = oh->fileSize;
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
++ in->hardLinks.next = (struct list_head *)hardList;
++ hardList = in;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
++ in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
++ break;
++ }
++
++ if(parent == dev->deletedDir)
++ {
++ yaffs_DestroyObject(in);
++ bi->hasShrinkHeader = 1;
++ }
++ //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
++ }
++ }
++ }
++
++ if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++ // If we got this far while scanning, then the block is fully allocated.
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++ bi->blockState = state;
++
++ // Now let's see if it was dirty
++ if( bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL)
++ {
++ yaffs_BlockBecameDirty(dev,blk);
++ }
++
++ }
++
++ if(blockIndex)
++ {
++ YFREE(blockIndex);
++ }
++
++ // Ok, we've done all the scanning.
++
++ // Fix up the hard link chains.
++ // We should now have scanned all the objects, now it's time to add these
++ // hardlinks.
++ while(hardList)
++ {
++ hl = hardList;
++ hardList = (yaffs_Object *)(hardList->hardLinks.next);
++
++ in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
++
++ if(in)
++ {
++ // Add the hardlink pointers
++ hl->variant.hardLinkVariant.equivalentObject=in;
++ list_add(&hl->hardLinks,&in->hardLinks);
++ }
++ else
++ {
++ //Todo Need to report/handle this better.
++ // Got a problem... hardlink to a non-existant object
++ hl->variant.hardLinkVariant.equivalentObject=NULL;
++ INIT_LIST_HEAD(&hl->hardLinks);
++
++ }
++
++ }
++
++ // Handle the unlinked files. Since they were left in an unlinked state we should
++ // just delete them.
++ {
++ struct list_head *i;
++ struct list_head *n;
++
++ yaffs_Object *l;
++ // Soft delete all the unlinked files
++ list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ yaffs_DestroyObject(l);
++ }
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
++
++ T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan ends" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++
++static int yaffs_ScanBackwards(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int nBlocksToScan = 0;
++
++ int chunk;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_Object *hl;
++ yaffs_BlockInfo *bi;
++ int sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++
++ __u8 *chunkData;
++
++ yaffs_BlockIndex *blockIndex = NULL;
++
++
++ if(!dev->isYaffs2)
++ {
++ T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock));
++
++ chunkData = yaffs_GetTempBuffer(dev,__LINE__);
++
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++
++
++ // Scan all the blocks to determine their state
++ for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++)
++ {
++ bi = yaffs_GetBlockInfo(dev,blk);
++ yaffs_ClearChunkBits(dev,blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
++
++ if(state == YAFFS_BLOCK_STATE_DEAD)
++ {
++ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
++ }
++ else if(state == YAFFS_BLOCK_STATE_EMPTY)
++ {
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ }
++ else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++
++ // Determine the highest sequence number
++ if( dev->isYaffs2 &&
++ sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
++ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
++ {
++
++ blockIndex[nBlocksToScan].seq = sequenceNumber;
++ blockIndex[nBlocksToScan].block = blk;
++
++ nBlocksToScan++;
++
++ if(sequenceNumber >= dev->sequenceNumber)
++ {
++ dev->sequenceNumber = sequenceNumber;
++ }
++ }
++ else if(dev->isYaffs2)
++ {
++ // TODO: Nasty sequence number!
++ T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
++
++ }
++ }
++ }
++
++ // Sort the blocks
++ // Dungy old bubble sort for now...
++ {
++ yaffs_BlockIndex temp;
++ int i;
++ int j;
++
++ for(i = 0; i < nBlocksToScan; i++)
++ for(j = i+1; j < nBlocksToScan; j++)
++ if(blockIndex[i].seq > blockIndex[j].seq)
++ {
++ temp = blockIndex[j];
++ blockIndex[j] = blockIndex[i];
++ blockIndex[i] = temp;
++ }
++ }
++
++
++ // Now scan the blocks looking at the data.
++ startIterator = 0;
++ endIterator = nBlocksToScan-1;
++ T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
++
++
++ // For each block.... backwards
++ for(blockIterator = endIterator; blockIterator >= startIterator; blockIterator--)
++ {
++
++ // get the block to scan in the correct order
++ blk = blockIndex[blockIterator].block;
++
++
++ bi = yaffs_GetBlockInfo(dev,blk);
++ state = bi->blockState;
++
++ deleted = 0;
++
++ if( 0 && // Disable since this is redundant.
++ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++ // Let's look at the first chunk in the block
++ chunk = blk * dev->nChunksPerBlock;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
++
++ // Let's have a good look at this chunk...
++
++ if(!tags.chunkUsed)
++ {
++ // An unassigned chunk in the block
++ // This means that either the block is empty or
++ // this is the one being allocated from
++
++ // We're looking at the first chunk in the block so the block is unused
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->nChunksPerBlock;
++ }
++
++ }
++
++ // For each chunk in each block that needs scanning....
++ for(c = dev->nChunksPerBlock-1; c >= 0 &&
++ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ state == YAFFS_BLOCK_STATE_ALLOCATING); c--)
++ {
++ // Scan backwards...
++ // Read the tags and decide what to do
++ chunk = blk * dev->nChunksPerBlock + c;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
++
++ // Let's have a good look at this chunk...
++
++ if(!tags.chunkUsed)
++ {
++ // An unassigned chunk in the block
++ // This means that either the block is empty or
++ // this is the one being allocated from
++
++ if(c == 0)
++ {
++ // We're looking at the first chunk in the block so the block is unused
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ }
++ else
++ {
++ // this is the block being allocated from
++ if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++ T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
++ }
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
++ // go forth from here.
++ //Yaffs2 sanity check:
++ // This should be the one with the highest sequence number
++ if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
++ {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
++ blk,bi->sequenceNumber,dev->sequenceNumber));
++ }
++ }
++
++ dev->nFreeChunks ++;
++ }
++ else if(tags.chunkId > 0)
++ {
++ // chunkId > 0 so it is a data chunk...
++ unsigned int endpos;
++
++ __u32 chunkBase = (tags.chunkId - 1)* dev->nBytesPerChunk;
++
++ yaffs_SetChunkBit(dev,blk,c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
++ if(in->variantType == YAFFS_OBJECT_TYPE_FILE &&
++ chunkBase < in->variant.fileVariant.shrinkSize)
++ {
++ // This has not been invalidated by a resize
++ yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,-1);
++
++
++ // File size is calculated by looking at the data chunks if we have not
++ // seen an object header yet. Stop this practice once we find an object header.
++ endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
++ if(!in->valid && // have not got an object header yet
++ in->variant.fileVariant.scannedFileSize <endpos)
++ {
++ in->variant.fileVariant.scannedFileSize = endpos;
++ in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
++ }
++
++ }
++ else
++ {
++ // This chunk has been invalidated by a resize, so delete
++ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
++
++
++ }
++ //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
++ }
++ else
++ {
++ // chunkId == 0, so it is an ObjectHeader.
++ // Thus, we read in the object header and make the object
++ yaffs_SetChunkBit(dev,blk,c);
++ bi->pagesInUse++;
++
++ oh = NULL;
++ in = NULL;
++
++ if(tags.extraHeaderInfoAvailable)
++ {
++ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,tags.extraObjectType);
++ }
++
++
++ if(!in || !in->valid)
++ {
++
++ // If we don't have valid info then we need to read the chunk
++ // TODO In future we can probably defer reading the chunk and
++ // living with invalid data until needed.
++
++ yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
++
++ oh = (yaffs_ObjectHeader *)chunkData;
++
++ if(!in)
++ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
++
++ }
++
++ if(!in)
++ {
++ // TODO Hoosterman we have a problem!
++ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: Could not make object for object %d at chunk %d during scan" TENDSTR),tags.objectId,chunk));
++
++ }
++
++ if(in->valid)
++ {
++ // We have already filled this one. We have a duplicate that will be discarded, but
++ // we first have to suck out resize info if it is a file.
++
++ if( (in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
++ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
++ (tags.extraHeaderInfoAvailable && tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
++ )
++ {
++ __u32 thisSize = (oh) ? oh->fileSize : tags.extraFileLength;
++ __u32 parentObjectId = (oh) ? oh->parentObjectId : tags.extraParentObjectId;
++ unsigned isShrink = (oh) ? oh->isShrink : tags.extraIsShrinkHeader;
++
++ // If it is deleted (unlinked at start also means deleted)
++ // we treat the file size as being zeroed at this point.
++ if(parentObjectId == YAFFS_OBJECTID_DELETED ||
++ parentObjectId == YAFFS_OBJECTID_UNLINKED)
++ {
++ thisSize = 0;
++ isShrink = 1;
++ }
++
++ if(isShrink &&
++ in->variant.fileVariant.shrinkSize > thisSize)
++ {
++ in->variant.fileVariant.shrinkSize = thisSize;
++ }
++
++ if(isShrink)
++ {
++ bi->hasShrinkHeader = 1;
++ }
++
++ }
++ // Use existing - destroy this one.
++ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
++
++ }
++
++ if(!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
++ {
++ // We only load some info, don't fiddle with directory structure
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->chunkId = chunk;
++
++ }
++ else if(!in->valid)
++ {
++ // we need to load this info
++
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->chunkId = chunk;
++
++ if(oh->shadowsObject > 0)
++ {
++ yaffs_HandleShadowedObject(dev,oh->shadowsObject,0);
++ }
++
++
++ yaffs_SetObjectName(in,oh->name);
++ in->dirty = 0;
++
++ // directory stuff...
++ // hook up to parent
++
++ parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
++ if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
++ {
++ // Set up as a directory
++ parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
++ INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
++ }
++ else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ {
++ // Hoosterman, another problem....
++ // We're trying to use a non-directory as a directory
++
++ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent,in);
++
++ if((parent == dev->deletedDir ||
++ parent == dev->unlinkedDir))
++ {
++ in->deleted = 1; // If it is unlinked at start up then it wants deleting
++ }
++
++ if( oh->isShrink)
++ {
++ // Mark the block as having a shrinkHeader
++ bi->hasShrinkHeader = 1;
++ }
++
++
++ // Note re hardlinks.
++ // Since we might scan a hardlink before its equivalent object is scanned
++ // we put them all in a list.
++ // After scanning is complete, we should have all the objects, so we run through this
++ // list and fix up all the chains.
++
++ switch(in->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++
++
++ if(in->variant.fileVariant.scannedFileSize < oh->fileSize)
++ {
++ in->variant.fileVariant.fileSize = oh->fileSize;
++ in->variant.fileVariant.scannedFileSize = in->variant.fileVariant.fileSize;
++ }
++
++ if(oh->isShrink &&
++ in->variant.fileVariant.shrinkSize > oh->fileSize)
++ {
++ in->variant.fileVariant.shrinkSize = oh->fileSize;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
++ in->hardLinks.next = (struct list_head *)hardList;
++ hardList = in;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
++ in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
++ break;
++ }
++
++#if 0
++ if(parent == dev->deletedDir)
++ {
++ yaffs_DestroyObject(in);
++ bi->hasShrinkHeader = 1;
++ }
++#endif
++ //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
++ }
++ }
++ }
++
++ if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
++ {
++ // If we got this far while scanning, then the block is fully allocated.
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++ bi->blockState = state;
++
++ // Now let's see if it was dirty
++ if( bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL)
++ {
++ yaffs_BlockBecameDirty(dev,blk);
++ }
++
++ }
++
++ if(blockIndex)
++ {
++ YFREE(blockIndex);
++ }
++
++ // Ok, we've done all the scanning.
++
++ // Fix up the hard link chains.
++ // We should now have scanned all the objects, now it's time to add these
++ // hardlinks.
++ while(hardList)
++ {
++ hl = hardList;
++ hardList = (yaffs_Object *)(hardList->hardLinks.next);
++
++ in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
++
++ if(in)
++ {
++ // Add the hardlink pointers
++ hl->variant.hardLinkVariant.equivalentObject=in;
++ list_add(&hl->hardLinks,&in->hardLinks);
++ }
++ else
++ {
++ //Todo Need to report/handle this better.
++ // Got a problem... hardlink to a non-existant object
++ hl->variant.hardLinkVariant.equivalentObject=NULL;
++ INIT_LIST_HEAD(&hl->hardLinks);
++
++ }
++
++ }
++
++ {
++ struct list_head *i;
++ struct list_head *n;
++
++ yaffs_Object *l;
++
++ // Soft delete all the unlinked files
++ list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ yaffs_DestroyObject(l);
++ }
++ }
++
++ // Soft delete all the deletedDir files
++ list_for_each_safe(i,n,&dev->deletedDir->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ yaffs_DestroyObject(l);
++
++ }
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
++
++ T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards ends" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++
++
++////////////////////////// Directory Functions /////////////////////////
++
++
++static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj)
++{
++
++ if(!directory)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a null pointer directory" TENDSTR)));
++ YBUG();
++ }
++ if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a non-directory" TENDSTR)));
++ YBUG();
++ }
++
++ if(obj->siblings.prev == NULL)
++ {
++ // Not initialised
++ INIT_LIST_HEAD(&obj->siblings);
++
++ }
++ else if(!list_empty(&obj->siblings))
++ {
++ // If it is holed up somewhere else, un hook it
++ list_del_init(&obj->siblings);
++ }
++ // Now add it
++ list_add(&obj->siblings,&directory->variant.directoryVariant.children);
++ obj->parent = directory;
++
++ if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir)
++ {
++ obj->unlinked = 1;
++ obj->myDev->nUnlinkedFiles++;
++ obj->renameAllowed = 0;
++ }
++}
++
++static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
++{
++ list_del_init(&obj->siblings);
++ obj->parent = NULL;
++}
++
++yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name)
++{
++ int sum;
++
++ struct list_head *i;
++ YCHAR buffer[YAFFS_MAX_NAME_LENGTH+1];
++
++ yaffs_Object *l;
++
++ if(!name)
++ {
++ return NULL;
++ }
++
++ if(!directory)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
++ YBUG();
++ }
++ if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
++ YBUG();
++ }
++
++ sum = yaffs_CalcNameSum(name);
++
++ list_for_each(i,&directory->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++
++ // Special case for lost-n-found
++ if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND)
++ {
++ if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
++ {
++ return l;
++ }
++ }
++ else if(yaffs_SumCompare(l->sum, sum)||
++ l->chunkId <= 0) //LostnFound cunk called Objxxx
++ {
++ // Do a real check
++ yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH);
++ if(yaffs_strcmp(name,buffer) == 0)
++ {
++ return l;
++ }
++
++ }
++ }
++ }
++
++ return NULL;
++}
++
++
++int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *))
++{
++ struct list_head *i;
++ yaffs_Object *l;
++
++
++ if(!theDir)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
++ YBUG();
++ }
++ if(theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
++ YBUG();
++ }
++
++ list_for_each(i,&theDir->variant.directoryVariant.children)
++ {
++ if(i)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ if(l && !fn(l))
++ {
++ return YAFFS_FAIL;
++ }
++ }
++ }
++
++ return YAFFS_OK;
++
++}
++
++
++// GetEquivalentObject dereferences any hard links to get to the
++// actual object.
++
++yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
++{
++ if(obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ {
++ // We want the object id of the equivalent object, not this one
++ obj = obj->variant.hardLinkVariant.equivalentObject;
++ }
++ return obj;
++
++}
++
++int yaffs_GetObjectName(yaffs_Object *obj,YCHAR *name,int buffSize)
++{
++ memset(name,0,buffSize * sizeof(YCHAR));
++
++ if(obj->objectId == YAFFS_OBJECTID_LOSTNFOUND)
++ {
++ yaffs_strncpy(name,YAFFS_LOSTNFOUND_NAME,buffSize - 1);
++ }
++ else if(obj->chunkId <= 0)
++ {
++ YCHAR locName[20];
++ // make up a name
++ yaffs_sprintf(locName,_Y("%s%d"),YAFFS_LOSTNFOUND_PREFIX,obj->objectId);
++ yaffs_strncpy(name,locName,buffSize - 1);
++
++ }
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ else if(obj->shortName[0])
++ {
++ yaffs_strcpy(name,obj->shortName);
++ }
++#endif
++ else
++ {
++ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev,__LINE__);
++
++ yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
++
++ memset(buffer,0,obj->myDev->nBytesPerChunk);
++
++ if(obj->chunkId >= 0)
++ {
++ yaffs_ReadChunkWithTagsFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
++ }
++ yaffs_strncpy(name,oh->name,buffSize - 1);
++
++ yaffs_ReleaseTempBuffer(obj->myDev,buffer,__LINE__);
++ }
++
++ return yaffs_strlen(name);
++}
++
++int yaffs_GetObjectFileLength(yaffs_Object *obj)
++{
++
++ // Dereference any hard linking
++ obj = yaffs_GetEquivalentObject(obj);
++
++ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ {
++ return obj->variant.fileVariant.fileSize;
++ }
++ if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
++ {
++ return yaffs_strlen(obj->variant.symLinkVariant.alias);
++ }
++ else
++ {
++ // Only a directory should drop through to here
++ return obj->myDev->nBytesPerChunk;
++ }
++}
++
++int yaffs_GetObjectLinkCount(yaffs_Object *obj)
++{
++ int count = 0;
++ struct list_head *i;
++
++ if(!obj->unlinked)
++ {
++ count++; // the object itself
++ }
++ list_for_each(i,&obj->hardLinks)
++ {
++ count++; // add the hard links;
++ }
++ return count;
++
++}
++
++
++int yaffs_GetObjectInode(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ return obj->objectId;
++}
++
++unsigned yaffs_GetObjectType(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++
++ switch(obj->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY: return DT_DIR; break;
++ case YAFFS_OBJECT_TYPE_SYMLINK: return DT_LNK; break;
++ case YAFFS_OBJECT_TYPE_HARDLINK: return DT_REG; break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ if(S_ISFIFO(obj->yst_mode)) return DT_FIFO;
++ if(S_ISCHR(obj->yst_mode)) return DT_CHR;
++ if(S_ISBLK(obj->yst_mode)) return DT_BLK;
++ if(S_ISSOCK(obj->yst_mode)) return DT_SOCK;
++ default: return DT_REG; break;
++ }
++}
++
++YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
++{
++ obj = yaffs_GetEquivalentObject(obj);
++ if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
++ {
++ return yaffs_CloneString(obj->variant.symLinkVariant.alias);
++ }
++ else
++ {
++ return yaffs_CloneString(_Y(""));
++ }
++}
++
++#ifndef CONFIG_YAFFS_WINCE
++
++int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
++{
++ unsigned int valid = attr->ia_valid;
++
++ if(valid & ATTR_MODE) obj->yst_mode = attr->ia_mode;
++ if(valid & ATTR_UID) obj->yst_uid = attr->ia_uid;
++ if(valid & ATTR_GID) obj->yst_gid = attr->ia_gid;
++
++ if(valid & ATTR_ATIME) obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
++ if(valid & ATTR_CTIME) obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
++ if(valid & ATTR_MTIME) obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
++
++ if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
++
++ yaffs_UpdateObjectHeader(obj,NULL,1,0,0);
++
++ return YAFFS_OK;
++
++}
++int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
++{
++ unsigned int valid = 0;
++
++ attr->ia_mode = obj->yst_mode; valid |= ATTR_MODE;
++ attr->ia_uid = obj->yst_uid; valid |= ATTR_UID;
++ attr->ia_gid = obj->yst_gid; valid |= ATTR_GID;
++
++ Y_TIME_CONVERT(attr->ia_atime)= obj->yst_atime; valid |= ATTR_ATIME;
++ Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; valid |= ATTR_CTIME;
++ Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; valid |= ATTR_MTIME;
++
++ attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE;
++
++ attr->ia_valid = valid;
++
++ return YAFFS_OK;
++
++}
++
++#endif
++
++int yaffs_DumpObject(yaffs_Object *obj)
++{
++// __u8 buffer[YAFFS_BYTES_PER_CHUNK];
++ YCHAR name[257];
++// yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
++
++// memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
++
++// if(obj->chunkId >= 0)
++// {
++// yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
++// }
++
++ yaffs_GetObjectName(obj,name,256);
++
++ T(YAFFS_TRACE_ALWAYS,(TSTR("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d type %d size %d\n" TENDSTR),
++ obj->objectId,yaffs_GetObjectInode(obj), name, obj->dirty, obj->valid, obj->serial,
++ obj->sum, obj->chunkId, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
++
++#if 0
++ YPRINTF(("Object %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d\n",
++ obj->objectId, oh->name, obj->dirty, obj->valid, obj->serial,
++ obj->sum, obj->chunkId));
++ switch(obj->variantType)
++ {
++ case YAFFS_OBJECT_TYPE_FILE:
++ YPRINTF((" FILE length %d\n",obj->variant.fileVariant.fileSize));
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ YPRINTF((" DIRECTORY\n"));
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK: //todo
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ }
++#endif
++
++ return YAFFS_OK;
++}
++
++
++///////////////////////// Initialisation code ///////////////////////////
++
++
++static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
++{
++
++ // Common functions, gotta have
++ if(!dev->eraseBlockInNAND ||
++ !dev->initialiseNAND) return 0;
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++ // Can use the "with tags" style interface for yaffs1 or yaffs2
++ if(dev->writeChunkWithTagsToNAND &&
++ dev->readChunkWithTagsFromNAND &&
++ !dev->writeChunkToNAND &&
++ !dev->readChunkFromNAND &&
++ dev->markNANDBlockBad &&
++ dev->queryNANDBlock) return 1;
++#endif
++
++ // Can use the "spare" style interface for yaffs1
++ if(!dev->isYaffs2 &&
++ !dev->writeChunkWithTagsToNAND &&
++ !dev->readChunkWithTagsFromNAND &&
++ dev->writeChunkToNAND &&
++ dev->readChunkFromNAND &&
++ !dev->markNANDBlockBad &&
++ !dev->queryNANDBlock) return 1;
++
++ return 0; // bad
++}
++
++
++int yaffs_GutsInitialise(yaffs_Device *dev)
++{
++ unsigned x;
++ int bits;
++ int extraBits;
++ int nBlocks;
++
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
++ // Check stuff that must be set
++
++ if(!dev)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ dev->internalStartBlock = dev->startBlock;
++ dev->internalEndBlock = dev->endBlock;
++ dev->blockOffset = 0;
++ dev->chunkOffset = 0;
++ dev->nFreeChunks = 0;
++
++ if(dev->startBlock == 0)
++ {
++ dev->internalStartBlock = dev->startBlock + 1;
++ dev->internalEndBlock = dev->endBlock + 1;
++ dev->blockOffset = 1;
++ dev->chunkOffset = dev->nChunksPerBlock;
++ }
++
++ // Check geometry parameters.
++
++ if( (dev->isYaffs2 && dev->nBytesPerChunk <1024) ||
++ (!dev->isYaffs2 && dev->nBytesPerChunk !=512) ||
++ dev->nChunksPerBlock < 2 ||
++ dev->nReservedBlocks < 2 ||
++ dev->internalStartBlock <= 0 ||
++ dev->internalEndBlock <= 0 ||
++ dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
++ )
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " TENDSTR),
++ dev->nBytesPerChunk, dev->isYaffs2 ? "2" : ""));
++ return YAFFS_FAIL;
++ }
++
++ if(yaffs_InitialiseNAND(dev) != YAFFS_OK)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ // Got the right mix of functions?
++ //
++ if(!yaffs_CheckDevFunctions(dev))
++ {
++ //Function missing
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device function(s) missing or wrong\n" TENDSTR)));
++
++ return YAFFS_FAIL;
++ }
++
++ // This is really a compilation check.
++ if(!yaffs_CheckStructures())
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ if(dev->isMounted)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device already mounted\n" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ //
++ //
++ // Finished with most checks. One or two more checks happen later on too.
++ //
++
++ dev->isMounted = 1;
++
++
++ nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++
++
++
++ // OK now calculate a few things for the device
++ // Calculate chunkGroupBits.
++ // We need to find the next power of 2 > than internalEndBlock
++
++ x = dev->nChunksPerBlock * (dev->internalEndBlock+1);
++
++ for(bits = extraBits = 0; x > 1; bits++)
++ {
++ if(x & 1) extraBits++;
++ x >>= 1;
++ }
++
++ if(extraBits > 0) bits++;
++
++
++ // Level0 Tnodes are 16 bits, so if the bitwidth of the
++ // chunk range we're using is greater than 16 we need
++ // to figure out chunk shift and chunkGroupSize
++ if(bits <= 16)
++ {
++ dev->chunkGroupBits = 0;
++ }
++ else
++ {
++ dev->chunkGroupBits = bits - 16;
++ }
++
++ dev->chunkGroupSize = 1 << dev->chunkGroupBits;
++
++ if(dev->nChunksPerBlock < dev->chunkGroupSize)
++ {
++ // We have a problem because the soft delete won't work if
++ // the chunk group size > chunks per block.
++ // This can be remedied by using larger "virtual blocks".
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: chunk group too large\n" TENDSTR)));
++
++ return YAFFS_FAIL;
++ }
++
++
++ // OK, we've finished verifying the device, lets continue with initialisation
++
++ // More device initialisation
++ dev->garbageCollections = 0;
++ dev->passiveGarbageCollections = 0;
++ dev->currentDirtyChecker = 0;
++ dev->bufferedBlock = -1;
++ dev->doingBufferedBlockRewrite = 0;
++ dev->nDeletedFiles = 0;
++ dev->nBackgroundDeletions=0;
++ dev->nUnlinkedFiles = 0;
++ dev->eccFixed=0;
++ dev->eccUnfixed=0;
++ dev->tagsEccFixed=0;
++ dev->tagsEccUnfixed=0;
++ dev->nErasureFailures = 0;
++ dev->nErasedBlocks = 0;
++ dev->isDoingGC = 0;
++
++ //dev->localBuffer = YMALLOC(dev->nBytesPerChunk);
++ // Initialise temporary buffers
++ {
++ int i;
++ for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ {
++ dev->tempBuffer[i].line = 0; // not in use
++ dev->tempBuffer[i].buffer = YMALLOC(dev->nBytesPerChunk);
++ }
++ }
++
++
++
++ yaffs_InitialiseBlocks(dev,nBlocks);
++
++ yaffs_InitialiseTnodes(dev);
++
++ yaffs_InitialiseObjects(dev);
++
++ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
++
++ if(dev->nShortOpCaches > 0)
++ {
++ int i;
++
++ if(dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
++ {
++ dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
++ }
++
++ dev->srCache = YMALLOC( dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
++
++ for(i=0; i < dev->nShortOpCaches; i++)
++ {
++ dev->srCache[i].object = NULL;
++ dev->srCache[i].lastUse = 0;
++ dev->srCache[i].dirty = 0;
++ dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk);
++ }
++ dev->srLastUse = 0;
++ }
++
++ dev->cacheHits = 0;
++
++
++ // Initialise the unlinked, root and lost and found directories
++ dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = dev->deletedDir = NULL;
++
++ dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
++ dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_DELETED, S_IFDIR);
++
++ dev->rootDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_ROOT,YAFFS_ROOT_MODE | S_IFDIR);
++ dev->lostNFoundDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_LOSTNFOUND,YAFFS_LOSTNFOUND_MODE | S_IFDIR);
++ yaffs_AddObjectToDirectory(dev->rootDir,dev->lostNFoundDir);
++
++ if(dev->isYaffs2)
++ {
++ dev->useHeaderFileSize = 1;
++ }
++
++ // Now scan the flash.
++
++ if(dev->isYaffs2)
++ yaffs_ScanBackwards(dev);
++ else
++ yaffs_Scan(dev);
++
++ // Zero out stats
++ dev->nPageReads = 0;
++ dev->nPageWrites = 0;
++ dev->nBlockErasures = 0;
++ dev->nGCCopies = 0;
++ dev->nRetriedWrites = 0;
++
++ dev->nRetiredBlocks = 0;
++
++ yaffs_VerifyFreeChunks(dev);
++
++ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
++ return YAFFS_OK;
++
++}
++
++void yaffs_Deinitialise(yaffs_Device *dev)
++{
++ if(dev->isMounted)
++ {
++ int i;
++
++ yaffs_DeinitialiseBlocks(dev);
++ yaffs_DeinitialiseTnodes(dev);
++ yaffs_DeinitialiseObjects(dev);
++ if(dev->nShortOpCaches > 0)
++ {
++
++ for(i=0; i < dev->nShortOpCaches; i++)
++ {
++ YFREE(dev->srCache[i].data);
++ }
++
++ YFREE(dev->srCache);
++ }
++
++ YFREE(dev->gcCleanupList);
++
++ for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
++ {
++ YFREE(dev->tempBuffer[i].buffer);
++ }
++
++ dev->isMounted = 0;
++ }
++
++}
++
++#if 0
++
++int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
++{
++ int nFree = dev->nFreeChunks - (dev->nChunksPerBlock * YAFFS_RESERVED_BLOCKS);
++
++ struct list_head *i;
++ yaffs_Object *l;
++
++
++ // To the free chunks add the chunks that are in the deleted unlinked files.
++ list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
++ {
++ l = list_entry(i, yaffs_Object,siblings);
++ if(l->deleted)
++ {
++ nFree++;
++ nFree += l->nDataChunks;
++ }
++ }
++
++
++ // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
++
++ if(nFree < 0) nFree = 0;
++
++ return nFree;
++
++}
++
++#endif
++
++static int yaffs_CountFreeChunks(yaffs_Device *dev)
++{
++ int nFree;
++ int b;
++
++ yaffs_BlockInfo *blk;
++
++
++ for(nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; b++)
++ {
++ blk = yaffs_GetBlockInfo(dev,b);
++
++ switch(blk->blockState)
++ {
++ case YAFFS_BLOCK_STATE_EMPTY:
++ case YAFFS_BLOCK_STATE_ALLOCATING:
++ case YAFFS_BLOCK_STATE_COLLECTING:
++ case YAFFS_BLOCK_STATE_FULL: nFree += (dev->nChunksPerBlock - blk->pagesInUse + blk->softDeletions); break;
++ default: break;
++ }
++
++ }
++
++ return nFree;
++}
++
++
++
++int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
++{
++ // This is what we report to the outside world
++
++ int nFree;
++ int nDirtyCacheChunks;
++
++#if 1
++ nFree = dev->nFreeChunks;
++#else
++ nFree = yaffs_CountFreeChunks(dev);
++#endif
++
++ // Now count the number of dirty chunks in the cache and subtract those
++
++ {
++ int i;
++ for( nDirtyCacheChunks = 0,i = 0; i < dev->nShortOpCaches; i++)
++ {
++ if(dev->srCache[i].dirty) nDirtyCacheChunks++;
++ }
++ }
++
++ nFree -= nDirtyCacheChunks;
++
++ nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
++
++ if(nFree < 0) nFree = 0;
++
++ return nFree;
++
++}
++
++static int yaffs_freeVerificationFailures;
++
++static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
++{
++ int counted = yaffs_CountFreeChunks(dev);
++
++ int difference = dev->nFreeChunks - counted;
++
++ if(difference)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("Freechunks verification failure %d %d %d" TENDSTR),dev->nFreeChunks,counted,difference));
++ yaffs_freeVerificationFailures++;
++ }
++}
++
++/////////////////// YAFFS test code //////////////////////////////////
++
++#define yaffs_CheckStruct(structure,syze, name) \
++ if(sizeof(structure) != syze) \
++ { \
++ T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \
++ return YAFFS_FAIL; \
++ }
++
++
++static int yaffs_CheckStructures(void)
++{
++// yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags")
++// yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion")
++// yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare")
++#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ yaffs_CheckStruct(yaffs_Tnode,2* YAFFS_NTNODES_LEVEL0,"yaffs_Tnode")
++#endif
++ yaffs_CheckStruct(yaffs_ObjectHeader,512,"yaffs_ObjectHeader")
++
++
++ return YAFFS_OK;
++}
++
++#if 0
++void yaffs_GutsTest(yaffs_Device *dev)
++{
++
++ if(yaffs_CheckStructures() != YAFFS_OK)
++ {
++ T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR)));
++ return;
++ }
++
++ yaffs_TnodeTest(dev);
++ yaffs_ObjectTest(dev);
++}
++#endif
++
++
+diff --git a/fs/yaffs/yaffs_guts.h b/fs/yaffs/yaffs_guts.h
+new file mode 100644
+index 0000000..58c52e0
+--- /dev/null
++++ b/fs/yaffs/yaffs_guts.h
+@@ -0,0 +1,759 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_guts.h: Configuration etc for yaffs_guts
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * $Id: yaffs_guts.h,v 1.11 2005/07/31 06:52:40 charles Exp $
++ */
++
++#ifndef __YAFFS_GUTS_H__
++#define __YAFFS_GUTS_H__
++
++#include "devextras.h"
++#include "yportenv.h"
++
++#define YAFFS_OK 1
++#define YAFFS_FAIL 0
++
++// Give us a Y=0x59,
++// Give us an A=0x41,
++// Give us an FF=0xFF
++// Give us an S=0x53
++// And what have we got...
++#define YAFFS_MAGIC 0x5941FF53
++
++#define YAFFS_NTNODES_LEVEL0 16
++#define YAFFS_TNODES_LEVEL0_BITS 4
++#define YAFFS_TNODES_LEVEL0_MASK 0xf
++
++#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
++#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
++#define YAFFS_TNODES_INTERNAL_MASK 0x7
++#define YAFFS_TNODES_MAX_LEVEL 6
++
++#ifndef CONFIG_YAFFS_NO_YAFFS1
++#define YAFFS_BYTES_PER_SPARE 16
++#define YAFFS_BYTES_PER_CHUNK 512
++#define YAFFS_CHUNK_SIZE_SHIFT 9
++#define YAFFS_CHUNKS_PER_BLOCK 32
++#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
++#endif
++
++#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
++#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
++
++#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
++
++#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
++
++#define YAFFS_ALLOCATION_NOBJECTS 100
++#define YAFFS_ALLOCATION_NTNODES 100
++#define YAFFS_ALLOCATION_NLINKS 100
++
++#define YAFFS_NOBJECT_BUCKETS 256
++
++
++#define YAFFS_OBJECT_SPACE 0x40000
++
++#ifdef CONFIG_YAFFS_UNICODE
++#define YAFFS_MAX_NAME_LENGTH 127
++#define YAFFS_MAX_ALIAS_LENGTH 79
++#else
++#define YAFFS_MAX_NAME_LENGTH 255
++#define YAFFS_MAX_ALIAS_LENGTH 159
++#endif
++
++#define YAFFS_SHORT_NAME_LENGTH 15
++
++
++#define YAFFS_OBJECTID_ROOT 1
++#define YAFFS_OBJECTID_LOSTNFOUND 2
++#define YAFFS_OBJECTID_UNLINKED 3
++#define YAFFS_OBJECTID_DELETED 4
++
++#define YAFFS_MAX_SHORT_OP_CACHES 20
++
++#define YAFFS_N_TEMP_BUFFERS 4
++
++// Sequence numbers are used in YAFFS2 to determine block allocation order.
++// The range is limited slightly to help distinguish bad numbers from good.
++// This also allows us to perhaps in the future use special numbers for
++// special purposes.
++// EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
++// and is a larger number than the lifetime of a 2GB device.
++
++#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
++#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
++
++
++// ChunkCache is used for short read/write operations.
++typedef struct
++{
++ struct yaffs_ObjectStruct *object;
++ int chunkId;
++ int lastUse;
++ int dirty;
++ int nBytes; // Only valid if the cache is dirty
++ int locked; // Can't push out or flush while locked..
++#ifdef CONFIG_YAFFS_YAFFS2
++ __u8 *data;
++#else
++ __u8 data[YAFFS_BYTES_PER_CHUNK];
++#endif
++} yaffs_ChunkCache;
++
++
++#ifndef CONFIG_YAFFS_NO_YAFFS1
++// Tags structures in RAM
++// NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
++// the structure size will get blown out.
++
++typedef struct
++{
++ unsigned chunkId:20;
++ unsigned serialNumber:2;
++ unsigned byteCount:10;
++ unsigned objectId:18;
++ unsigned ecc:12;
++ unsigned unusedStuff:2;
++
++} yaffs_Tags;
++
++typedef union
++{
++ yaffs_Tags asTags;
++ __u8 asBytes[8];
++} yaffs_TagsUnion;
++
++#endif
++
++typedef enum
++{
++ YAFFS_ECC_RESULT_UNKNOWN,
++ YAFFS_ECC_RESULT_NO_ERROR,
++ YAFFS_ECC_RESULT_FIXED,
++ YAFFS_ECC_RESULT_UNFIXED
++} yaffs_ECCResult;
++
++typedef enum
++{
++ YAFFS_OBJECT_TYPE_UNKNOWN,
++ YAFFS_OBJECT_TYPE_FILE,
++ YAFFS_OBJECT_TYPE_SYMLINK,
++ YAFFS_OBJECT_TYPE_DIRECTORY,
++ YAFFS_OBJECT_TYPE_HARDLINK,
++ YAFFS_OBJECT_TYPE_SPECIAL
++} yaffs_ObjectType;
++
++
++typedef struct
++{
++
++ unsigned validMarker0;
++ unsigned chunkUsed; // Status of the chunk: used or unused
++ unsigned objectId; // If 0 then this is not part of an object (unused)
++ unsigned chunkId; // If 0 then this is a header, else a data chunk
++ unsigned byteCount; // Only valid for data chunks
++
++
++ // The following stuff only has meaning when we read
++ yaffs_ECCResult eccResult; // Only valid when we read.
++ unsigned blockBad; // Only valid on reading
++
++ // YAFFS 1 stuff
++ unsigned chunkDeleted; // The chunk is marked deleted
++ unsigned serialNumber; // Yaffs1 2-bit serial number
++
++ // YAFFS2 stuff
++ unsigned sequenceNumber; // The sequence number of this block
++
++ // Extra info if this is an object header (YAFFS2 only)
++
++ unsigned extraHeaderInfoAvailable; // There is extra info available if this is not zero
++ unsigned extraParentObjectId; // The parent object
++ unsigned extraIsShrinkHeader; // Is it a shrink header?
++ unsigned extraShadows; // Does this shadow another object?
++
++ yaffs_ObjectType extraObjectType; // What object type?
++
++ unsigned extraFileLength; // Length if it is a file
++ unsigned extraEquivalentObjectId; // Equivalent object Id if it is a hard link
++
++ unsigned validMarker1;
++
++} yaffs_ExtendedTags;
++
++#ifndef CONFIG_YAFFS_NO_YAFFS1
++// Spare structure
++typedef struct
++{
++ __u8 tagByte0;
++ __u8 tagByte1;
++ __u8 tagByte2;
++ __u8 tagByte3;
++ __u8 pageStatus; // set to 0 to delete the chunk
++ __u8 blockStatus;
++ __u8 tagByte4;
++ __u8 tagByte5;
++ __u8 ecc1[3];
++ __u8 tagByte6;
++ __u8 tagByte7;
++ __u8 ecc2[3];
++} yaffs_Spare;
++
++//Special structure for passing through to mtd
++struct yaffs_NANDSpare {
++ yaffs_Spare spare;
++ int eccres1;
++ int eccres2;
++};
++#endif
++
++
++// Block data in RAM
++
++typedef enum {
++ YAFFS_BLOCK_STATE_UNKNOWN = 0,
++
++ YAFFS_BLOCK_STATE_SCANNING,
++ YAFFS_BLOCK_STATE_NEEDS_SCANNING,// The block might have something on it (ie it is allocating or full, perhaps empty)
++ // but it needs to be scanned to determine its true state.
++ // This state is only valid during yaffs_Scan.
++ // NB We tolerate empty because the pre-scanner might be incapable of deciding
++ // However, if this state is returned on a YAFFS2 device, then we expect a sequence number
++
++ YAFFS_BLOCK_STATE_EMPTY, // This block is empty
++
++ YAFFS_BLOCK_STATE_ALLOCATING, // This block is partially allocated.
++ // This is the one currently being used for page
++ // allocation. Should never be more than one of these
++
++
++ YAFFS_BLOCK_STATE_FULL, // All the pages in this block have been allocated.
++ // At least one page holds valid data.
++
++ YAFFS_BLOCK_STATE_DIRTY, // All pages have been allocated and deleted.
++ // Erase me, reuse me.
++
++ YAFFS_BLOCK_STATE_COLLECTING, // This block is being garbage collected
++
++ YAFFS_BLOCK_STATE_DEAD // This block has failed and is not in use
++
++} yaffs_BlockState;
++
++
++
++
++typedef struct
++{
++
++ int softDeletions:12; // number of soft deleted pages
++ int pagesInUse:12; // number of pages in use
++ yaffs_BlockState blockState:4; // One of the above block states
++ __u32 needsRetiring:1; // Data has failed on this block, need to get valid data off
++ // and retire the block.
++#ifdef CONFIG_YAFFS_YAFFS2
++ __u32 hasShrinkHeader:1;// This block has at least one object header that does a shrink
++ __u32 sequenceNumber; // block sequence number for yaffs2
++#endif
++
++} yaffs_BlockInfo;
++
++
++//////////////////// Object structure ///////////////////////////
++// This is the object structure as stored on NAND
++
++typedef struct
++{
++ yaffs_ObjectType type;
++
++ // Apply to everything
++ int parentObjectId;
++ __u16 sum__NoLongerUsed; // checksum of name. Calc this off the name to prevent inconsistencies
++ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
++
++ // Thes following apply to directories, files, symlinks - not hard links
++ __u32 yst_mode; // protection
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 notForWinCE[5];
++#else
++ __u32 yst_uid; // user ID of owner
++ __u32 yst_gid; // group ID of owner
++ __u32 yst_atime; // time of last access
++ __u32 yst_mtime; // time of last modification
++ __u32 yst_ctime; // time of last change
++#endif
++
++ // File size applies to files only
++ int fileSize;
++
++ // Equivalent object id applies to hard links only.
++ int equivalentObjectId;
++
++ // Alias is for symlinks only.
++ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
++
++ __u32 yst_rdev; // device stuff for block and char devices (maj/min)
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 win_ctime[2];
++ __u32 win_atime[2];
++ __u32 win_mtime[2];
++ __u32 roomToGrow[4];
++#else
++ __u32 roomToGrow[10];
++#endif
++
++ int shadowsObject; // This object header shadows the specified object if not > 0
++
++ // isShrink applies to object headers written when we shrink the file (ie resize)
++ __u32 isShrink;
++
++} yaffs_ObjectHeader;
++
++
++
++//////////////////// Tnode ///////////////////////////
++
++union yaffs_Tnode_union
++{
++#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
++ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL+1];
++#else
++ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
++#endif
++ __u16 level0[YAFFS_NTNODES_LEVEL0];
++
++};
++
++typedef union yaffs_Tnode_union yaffs_Tnode;
++
++struct yaffs_TnodeList_struct
++{
++ struct yaffs_TnodeList_struct *next;
++ yaffs_Tnode *tnodes;
++};
++
++typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
++
++
++
++/////////////////// Object ////////////////////////////////
++// An object can be one of:
++// - a directory (no data, has children links
++// - a regular file (data.... not prunes :->).
++// - a symlink [symbolic link] (the alias).
++// - a hard link
++
++
++typedef struct
++{
++ __u32 fileSize;
++ __u32 scannedFileSize;
++ __u32 shrinkSize;
++ int topLevel;
++ yaffs_Tnode *top;
++} yaffs_FileStructure;
++
++typedef struct
++{
++ struct list_head children; // list of child links
++} yaffs_DirectoryStructure;
++
++typedef struct
++{
++ YCHAR *alias;
++} yaffs_SymLinkStructure;
++
++typedef struct
++{
++ struct yaffs_ObjectStruct *equivalentObject;
++ __u32 equivalentObjectId;
++} yaffs_HardLinkStructure;
++
++typedef union
++{
++ yaffs_FileStructure fileVariant;
++ yaffs_DirectoryStructure directoryVariant;
++ yaffs_SymLinkStructure symLinkVariant;
++ yaffs_HardLinkStructure hardLinkVariant;
++} yaffs_ObjectVariant;
++
++
++struct yaffs_ObjectStruct
++{
++ __u8 deleted: 1; // This should only apply to unlinked files.
++ __u8 softDeleted: 1; // it has also been soft deleted
++ __u8 unlinked: 1; // An unlinked file. The file should be in the unlinked pseudo directory.
++ __u8 fake:1; // A fake object has no presence on NAND.
++ __u8 renameAllowed:1; // Some objects are not allowed to be renamed.
++ __u8 unlinkAllowed:1;
++ __u8 dirty:1; // the object needs to be written to flash
++ __u8 valid:1; // When the file system is being loaded up, this
++ // object might be created before the data
++ // is available (ie. file data records appear before the header).
++ __u8 serial; // serial number of chunk in NAND. Store here so we don't have to
++
++ __u8 deferedFree: 1; // For Linux kernel. Object is removed from NAND, but still in the inode cache.
++ // Free of object is defered.
++
++ __u8 lazyLoaded; // Vital info has been loaded from tags. Not all info available.
++ //
++
++ // read back the old one to update.
++ __u16 sum; // sum of the name to speed searching
++
++ struct yaffs_DeviceStruct *myDev; // The device I'm on
++
++
++ struct list_head hashLink; // list of objects in this hash bucket
++
++
++ struct list_head hardLinks; // all the equivalent hard linked objects
++ // live on this list
++ // directory structure stuff
++ struct yaffs_ObjectStruct *parent; //my parent directory
++ struct list_head siblings; // siblings in a directory
++ // also used for linking up the free list
++
++ // Where's my object header in NAND?
++ int chunkId; // where it lives
++
++ int nDataChunks; // Number of data chunks attached to the file.
++
++ __u32 objectId; // the object id value
++
++
++ __u32 yst_mode; // protection
++
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ YCHAR shortName[YAFFS_SHORT_NAME_LENGTH+1];
++#endif
++
++#ifndef __KERNEL__
++ __u32 inUse;
++#endif
++
++#ifdef CONFIG_YAFFS_WINCE
++ __u32 win_ctime[2];
++ __u32 win_mtime[2];
++ __u32 win_atime[2];
++#else
++ __u32 yst_uid; // user ID of owner
++ __u32 yst_gid; // group ID of owner
++ __u32 yst_atime; // time of last access
++ __u32 yst_mtime; // time of last modification
++ __u32 yst_ctime; // time of last change
++#endif
++
++ __u32 yst_rdev; // device stuff for block and char devices
++
++
++
++#ifdef __KERNEL__
++ struct inode *myInode;
++
++#endif
++
++
++
++ yaffs_ObjectType variantType;
++
++ yaffs_ObjectVariant variant;
++
++};
++
++
++
++typedef struct yaffs_ObjectStruct yaffs_Object;
++
++
++struct yaffs_ObjectList_struct
++{
++ yaffs_Object *objects;
++ struct yaffs_ObjectList_struct *next;
++};
++
++typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
++
++typedef struct
++{
++ struct list_head list;
++ int count;
++} yaffs_ObjectBucket;
++
++///////////////////// Temporary buffers ////////////////////
++//
++// These are chunk-sized working buffers. Each device has a few
++
++typedef struct {
++ __u8 *buffer;
++ int line; // track from whence this buffer was allocated
++ int maxLine;
++} yaffs_TempBuffer;
++
++//////////////////// Device ////////////////////////////////
++
++struct yaffs_DeviceStruct
++{
++ struct list_head devList;
++ const char *name;
++
++ // Entry parameters set up way early. Yaffs sets up the rest.
++ int nBytesPerChunk; // Should be a power of 2 >= 512
++ int nChunksPerBlock; // does not need to be a power of 2
++ int nBytesPerSpare; // spare area size
++ int startBlock; // Start block we're allowed to use
++ int endBlock; // End block we're allowed to use
++ int nReservedBlocks; // We want this tuneable so that we can reduce
++ // reserved blocks on NOR and RAM.
++
++ int nShortOpCaches; // If <= 0, then short op caching is disabled, else
++ // the number of short op caches (don't use too many).
++
++ int useHeaderFileSize; // Flag to determine if we should use file sizes from the header
++
++ int useNANDECC; // Flag to decide whether or not to use NANDECC
++
++
++ void *genericDevice; // Pointer to device context
++ // On an mtd this holds the mtd pointer.
++
++ // NAND access functions (Must be set before calling YAFFS)
++
++
++ int (*writeChunkToNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, const yaffs_Spare *spare);
++ int (*readChunkFromNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare);
++ int (*eraseBlockInNAND)(struct yaffs_DeviceStruct *dev,int blockInNAND);
++ int (*initialiseNAND)(struct yaffs_DeviceStruct *dev);
++
++#ifdef CONFIG_YAFFS_YAFFS2
++ int (*writeChunkWithTagsToNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *tags);
++ int (*readChunkWithTagsFromNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags);
++ int (*markNANDBlockBad)(struct yaffs_DeviceStruct *dev, int blockNo);
++ int (*queryNANDBlock)(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber);
++#endif
++
++ int isYaffs2;
++
++ // End of stuff that must be set before initialisation.
++
++ // Runtime parameters. Set up by YAFFS.
++
++ __u16 chunkGroupBits; // 0 for devices <= 32MB. else log2(nchunks) - 16
++ __u16 chunkGroupSize; // == 2^^chunkGroupBits
++
++#ifdef __KERNEL__
++
++ struct semaphore sem;// Semaphore for waiting on erasure.
++ struct semaphore grossLock; // Gross locking semaphore
++ __u8 * spareBuffer; // For mtdif2 use. Don't know the size of the buffer at compile time so we have to allocate it.
++ void (*putSuperFunc)(struct super_block *sb);
++#endif
++
++ int isMounted;
++
++ // Stuff to support block offsetting to support start block zero
++ int internalStartBlock;
++ int internalEndBlock;
++ int blockOffset;
++ int chunkOffset;
++
++ // Block Info
++ yaffs_BlockInfo *blockInfo;
++ __u8 *chunkBits; // bitmap of chunks in use
++ int chunkBitmapStride; // Number of bytes of chunkBits per block.
++ // Must be consistent with nChunksPerBlock.
++
++
++ int nErasedBlocks;
++ int allocationBlock; // Current block being allocated off
++ __u32 allocationPage;
++ int allocationBlockFinder; // Used to search for next allocation block
++
++ // Runtime state
++ int nTnodesCreated;
++ yaffs_Tnode *freeTnodes;
++ int nFreeTnodes;
++ yaffs_TnodeList *allocatedTnodeList;
++
++ int isDoingGC;
++
++ int nObjectsCreated;
++ yaffs_Object *freeObjects;
++ int nFreeObjects;
++
++ yaffs_ObjectList *allocatedObjectList;
++
++ yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
++
++ int nFreeChunks;
++
++ int currentDirtyChecker; // Used to find current dirtiest block
++
++ __u32 *gcCleanupList; // objects to delete at the end of a GC.
++
++ // Operations since mount
++ int nPageWrites;
++ int nPageReads;
++ int nBlockErasures;
++ int nErasureFailures;
++ int nGCCopies;
++ int garbageCollections;
++ int passiveGarbageCollections;
++ int nRetriedWrites;
++ int nRetiredBlocks;
++ int eccFixed;
++ int eccUnfixed;
++ int tagsEccFixed;
++ int tagsEccUnfixed;
++ int nDeletions;
++ int nUnmarkedDeletions;
++
++ yaffs_Object *rootDir;
++ yaffs_Object *lostNFoundDir;
++
++ // Buffer areas for storing data to recover from write failures
++// __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
++// yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
++ int bufferedBlock; // Which block is buffered here?
++ int doingBufferedBlockRewrite;
++
++ yaffs_ChunkCache *srCache;
++ int srLastUse;
++
++ int cacheHits;
++
++ // Stuff for background deletion and unlinked files.
++ yaffs_Object *unlinkedDir; // Directory where unlinked and deleted files live.
++ yaffs_Object *deletedDir; // Directory where deleted objects are sent to disappear.
++ yaffs_Object *unlinkedDeletion; // Current file being background deleted.
++ int nDeletedFiles; // Count of files awaiting deletion;
++ int nUnlinkedFiles; // Count of unlinked files.
++ int nBackgroundDeletions; // Count of background deletions.
++
++ //__u8 *localBuffer;
++
++ yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
++ int maxTemp;
++ int unmanagedTempAllocations;
++ int unmanagedTempDeallocations;
++
++ // yaffs2 runtime stuff
++ unsigned sequenceNumber; //Sequence number of currently allocating block
++ unsigned oldestDirtySequence;
++
++};
++
++typedef struct yaffs_DeviceStruct yaffs_Device;
++
++
++// Function to manipulate block info
++static Y_INLINE yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk)
++{
++ if(blk < dev->internalStartBlock || blk > dev->internalEndBlock)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),blk));
++ YBUG();
++ }
++ return &dev->blockInfo[blk - dev->internalStartBlock];
++}
++
++
++//////////// YAFFS Functions //////////////////
++
++int yaffs_GutsInitialise(yaffs_Device *dev);
++void yaffs_Deinitialise(yaffs_Device *dev);
++
++int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev);
++
++
++// Rename
++int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object *newDir, const YCHAR *newName);
++
++// generic Object functions
++int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name);
++int yaffs_DeleteFile(yaffs_Object *obj);
++
++// Object access functions.
++int yaffs_GetObjectName(yaffs_Object *obj,YCHAR *name,int buffSize);
++int yaffs_GetObjectFileLength(yaffs_Object *obj);
++int yaffs_GetObjectInode(yaffs_Object *obj);
++unsigned yaffs_GetObjectType(yaffs_Object *obj);
++int yaffs_GetObjectLinkCount(yaffs_Object *obj);
++
++// Change inode attributes
++int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr);
++int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr);
++
++// File operations
++int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, __u32 offset, int nBytes);
++int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, __u32 offset, int nBytes, int writeThrough);
++int yaffs_ResizeFile(yaffs_Object *obj, int newSize);
++
++yaffs_Object *yaffs_MknodFile(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid);
++int yaffs_FlushFile(yaffs_Object *obj,int updateTime);
++
++
++// Directory operations
++yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid);
++yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir,const YCHAR *name);
++int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *));
++
++yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number);
++
++// Link operations
++yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, yaffs_Object *equivalentObject);
++
++yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj);
++
++// Symlink operations
++yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, __u32 mode, __u32 uid, __u32 gid, const YCHAR *alias);
++YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj);
++
++// Special inodes (fifos, sockets and devices)
++yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid,__u32 rdev);
++
++
++// Special directories
++yaffs_Object *yaffs_Root(yaffs_Device *dev);
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
++
++#ifdef CONFIG_YAFFS_WINCE
++// CONFIG_YAFFS_WINCE special stuff
++void yfsd_WinFileTimeNow(__u32 target[2]);
++#endif
++
++#ifdef __KERNEL__
++
++void yaffs_HandleDeferedFree(yaffs_Object *obj);
++#endif
++
++
++
++
++// Debug dump
++int yaffs_DumpObject(yaffs_Object *obj);
++
++
++void yaffs_GutsTest(yaffs_Device *dev);
++
++
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
++void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND,int lyn);
++int yaffs_CheckFF(__u8 *buffer,int nBytes);
++
++#endif
++
+diff --git a/fs/yaffs/yaffs_mtdif.c b/fs/yaffs/yaffs_mtdif.c
+new file mode 100644
+index 0000000..90146fb
+--- /dev/null
++++ b/fs/yaffs/yaffs_mtdif.c
+@@ -0,0 +1,153 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif.c NAND mtd wrapper functions.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++
++const char *yaffs_mtdif_c_version = "$Id: yaffs_mtdif.c,v 1.7 2005/08/01 20:52:35 luc Exp $";
++
++#include "yportenv.h"
++
++#ifdef CONFIG_YAFFS_YAFFS1
++
++#include "yaffs_mtdif.h"
++
++#include "linux/mtd/mtd.h"
++#include "linux/types.h"
++#include "linux/time.h"
++#include "linux/mtd/nand.h"
++
++static struct nand_oobinfo yaffs_oobinfo = {
++ .useecc = 1,
++ .eccbytes = 6,
++ .eccpos = {8, 9, 10, 13, 14, 15}
++};
++
++static struct nand_oobinfo yaffs_noeccinfo = {
++ .useecc = 0,
++};
++
++
++int nandmtd_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ size_t dummy;
++ int retval = 0;
++
++ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
++
++ __u8 *spareAsBytes = (__u8 *)spare;
++
++ if(data && spare)
++ {
++ if(dev->useNANDECC)
++ retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo);
++ else
++ retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo);
++ }
++ else
++ {
++ if(data)
++ retval = mtd->write(mtd,addr,dev->nBytesPerChunk,&dummy,data);
++ if(spare)
++ retval = mtd->write_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
++ }
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ size_t dummy;
++ int retval = 0;
++
++ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
++
++ __u8 *spareAsBytes = (__u8 *)spare;
++
++ if(data && spare)
++ {
++ if(dev->useNANDECC)
++ { // Careful, this call adds 2 ints to the end of the spare data. Calling function should
++ // allocate enough memory for spare, i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)].
++ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo);
++ }
++ else
++ {
++ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo);
++ }
++ }
++ else
++ {
++ if(data)
++ retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data);
++ if(spare)
++ retval = mtd->read_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes);
++ }
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++// Callback not needed for NAND
++#if 0
++static void nandmtd_EraseCallback(struct erase_info *ei)
++{
++ yaffs_Device *dev = (yaffs_Device *)ei->priv;
++ up(&dev->sem);
++}
++#endif
++
++
++int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ __u32 addr = ((loff_t) blockNumber) * dev->nBytesPerChunk * dev->nChunksPerBlock;
++ struct erase_info ei;
++ int retval = 0;
++
++ ei.mtd = mtd;
++ ei.addr = addr;
++ ei.len = dev->nBytesPerChunk * dev->nChunksPerBlock;
++ ei.time = 1000;
++ ei.retries = 2;
++ ei.callback = NULL;
++ ei.priv = (u_long)dev;
++
++ // Todo finish off the ei if required
++
++ sema_init(&dev->sem,0);
++
++ retval = mtd->erase(mtd,&ei);
++
++ //No need for callback
++ // down(&dev->sem); // Wait for the erasure to complete
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd_InitialiseNAND(yaffs_Device *dev)
++{
++ return YAFFS_OK;
++}
++
++#endif // CONFIG_YAFFS_YAFFS1
++
+diff --git a/fs/yaffs/yaffs_mtdif.h b/fs/yaffs/yaffs_mtdif.h
+new file mode 100644
+index 0000000..8846828
+--- /dev/null
++++ b/fs/yaffs/yaffs_mtdif.h
+@@ -0,0 +1,33 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif.h NAND mtd interface wrappers
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * $Id: yaffs_mtdif.h,v 1.2 2005/07/19 20:41:59 charles Exp $
++ */
++
++#ifndef __YAFFS_MTDIF_H__
++#define __YAFFS_MTDIF_H__
++
++#include "yaffs_guts.h"
++
++int nandmtd_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare);
++int nandmtd_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare);
++int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
++int nandmtd_InitialiseNAND(yaffs_Device *dev);
++#endif
++
++
++
++
+diff --git a/fs/yaffs/yaffs_mtdif2.c b/fs/yaffs/yaffs_mtdif2.c
+new file mode 100644
+index 0000000..0c4cc39
+--- /dev/null
++++ b/fs/yaffs/yaffs_mtdif2.c
+@@ -0,0 +1,177 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif.c NAND mtd wrapper functions.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++
++// mtd interface for YAFFS2
++
++const char *yaffs_mtdif2_c_version = "$Id: yaffs_mtdif2.c,v 1.6 2005/08/01 20:52:35 luc Exp $";
++
++#include "yportenv.h"
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++#include "yaffs_mtdif2.h"
++
++#include "linux/mtd/mtd.h"
++#include "linux/types.h"
++#include "linux/time.h"
++
++#include "yaffs_packedtags2.h"
++
++
++
++
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ size_t dummy;
++ int retval = 0;
++
++
++ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,(TSTR("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" TENDSTR),chunkInNAND,data,tags));
++
++ if(tags)
++ {
++ yaffs_PackTags2(&pt,tags);
++ }
++
++ if(data && tags)
++ {
++ if(dev->useNANDECC)
++ retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,(__u8 *)&pt,NULL);
++ else
++ retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,(__u8 *)&pt,NULL);
++ }
++ else
++ {
++ if(data)
++ retval = mtd->write(mtd,addr,dev->nBytesPerChunk,&dummy,data);
++ if(tags)
++ retval = mtd->write_oob(mtd,addr,mtd->oobsize,&dummy,(__u8 *)&pt);
++
++ }
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ size_t dummy;
++ int retval = 0;
++
++
++ loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk;
++
++ yaffs_PackedTags2 pt;
++
++ T(YAFFS_TRACE_MTD,(TSTR("nandmtd2_ReadChunkWithTagsToNAND chunk %d data %p tags %p" TENDSTR),chunkInNAND,data,tags));
++
++ if(data && tags)
++ {
++ if(dev->useNANDECC)
++ {
++ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,dev->spareBuffer,NULL);
++ }
++ else
++ {
++ retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,dev->spareBuffer,NULL);
++ }
++ memcpy(&pt,dev->spareBuffer,sizeof(pt));
++ }
++ else
++ {
++ if(data)
++ retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data);
++ if(tags) {
++ retval = mtd->read_oob(mtd,addr,mtd->oobsize,&dummy,dev->spareBuffer);
++ memcpy(&pt, mtd->oobinfo.oobfree[0][0] + (char *)dev->spareBuffer, sizeof(pt));
++ }
++ }
++
++ if(tags)
++ yaffs_UnpackTags2(tags,&pt);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ int retval;
++ T(YAFFS_TRACE_MTD,(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR),blockNo));
++
++
++ retval = mtd->block_markbad(mtd,blockNo * dev->nChunksPerBlock * dev->nBytesPerChunk);
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++
++}
++
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber)
++{
++ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ int retval;
++
++ T(YAFFS_TRACE_MTD,(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR),blockNo));
++ retval = mtd->block_isbad(mtd,blockNo* dev->nChunksPerBlock * dev->nBytesPerChunk);
++
++ if(retval)
++ {
++ T(YAFFS_TRACE_MTD,(TSTR("block is bad" TENDSTR)));
++
++ *state = YAFFS_BLOCK_STATE_DEAD;
++ *sequenceNumber = 0;
++ }
++ else
++ {
++ yaffs_ExtendedTags t;
++ nandmtd2_ReadChunkWithTagsFromNAND(dev,blockNo * dev->nChunksPerBlock,NULL, &t);
++
++ if(t.chunkUsed)
++ {
++ *sequenceNumber = t.sequenceNumber;
++ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++ }
++ else
++ {
++ *sequenceNumber = 0;
++ *state = YAFFS_BLOCK_STATE_EMPTY;
++ }
++ }
++ T(YAFFS_TRACE_MTD,(TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,*state));
++
++ if (retval == 0)
++ return YAFFS_OK;
++ else
++ return YAFFS_FAIL;
++}
++
++#endif
++
++
++
+diff --git a/fs/yaffs/yaffs_mtdif2.h b/fs/yaffs/yaffs_mtdif2.h
+new file mode 100644
+index 0000000..5b308ee
+--- /dev/null
++++ b/fs/yaffs/yaffs_mtdif2.h
+@@ -0,0 +1,27 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_mtdif.c NAND mtd wrapper functions.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++
++
++#ifndef __YAFFS_MTDIF2_H__
++#define __YAFFS_MTDIF2_H__
++
++
++#include "yaffs_guts.h"
++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags);
++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags);
++int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber);
++
++#endif
+diff --git a/fs/yaffs/yaffs_nandemul2k.h b/fs/yaffs/yaffs_nandemul2k.h
+new file mode 100644
+index 0000000..b35d474
+--- /dev/null
++++ b/fs/yaffs/yaffs_nandemul2k.h
+@@ -0,0 +1,38 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * yaffs_nandemul2k.h: Interface to emulated NAND functions (2k page size)
++ *
++ * $Id: yaffs_nandemul2k.h,v 1.1 2004/12/17 04:39:04 charles Exp $
++ */
++
++#ifndef __YAFFS_NANDEMUL2K_H__
++#define __YAFFS_NANDEMUL2K_H__
++
++#include "yaffs_guts.h"
++
++
++int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags);
++int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags);
++int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber);
++int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND);
++int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
++int nandemul2k_GetBytesPerChunk(void);
++int nandemul2k_GetChunksPerBlock(void);
++int nandemul2k_GetNumberOfBlocks(void);
++
++#endif
++
+diff --git a/fs/yaffs/yaffs_packedtags1.c b/fs/yaffs/yaffs_packedtags1.c
+new file mode 100644
+index 0000000..bab338f
+--- /dev/null
++++ b/fs/yaffs/yaffs_packedtags1.c
+@@ -0,0 +1,42 @@
++#include "yaffs_packedtags1.h"
++#include "yportenv.h"
++
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t)
++{
++ pt->chunkId = t->chunkId;
++ pt->serialNumber = t->serialNumber;
++ pt->byteCount = t->byteCount;
++ pt->objectId = t->objectId;
++ pt->ecc = 0;
++ pt->deleted = (t->chunkDeleted) ? 0 : 1;
++ pt->unusedStuff = 0;
++ pt->shouldBeFF = 0xFFFFFFFF;
++
++}
++
++void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt)
++{
++ static const __u8 allFF[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,0xff, 0xff, 0xff, 0xff};
++
++ if(memcmp(allFF,pt,sizeof(yaffs_PackedTags1)))
++ {
++ t->blockBad = 0;
++ if(pt->shouldBeFF != 0xFFFFFFFF)
++ {
++ t->blockBad = 1;
++ }
++ t->chunkUsed = 1;
++ t->objectId = pt->objectId;
++ t->chunkId = pt->chunkId;
++ t->byteCount = pt->byteCount;
++ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++ t->chunkDeleted = (pt->deleted) ? 0 : 1;
++ t->serialNumber = pt->serialNumber;
++ }
++ else
++ {
++ memset(t,0,sizeof(yaffs_ExtendedTags));
++
++ }
++}
++
+diff --git a/fs/yaffs/yaffs_packedtags1.h b/fs/yaffs/yaffs_packedtags1.h
+new file mode 100644
+index 0000000..0f76615
+--- /dev/null
++++ b/fs/yaffs/yaffs_packedtags1.h
+@@ -0,0 +1,28 @@
++// This is used to pack YAFFS1 tags, not YAFFS2 tags.
++
++#ifndef __YAFFS_PACKEDTAGS1_H__
++#define __YAFFS_PACKEDTAGS1_H__
++
++
++#include "yaffs_guts.h"
++
++typedef struct
++{
++ unsigned chunkId:20;
++ unsigned serialNumber:2;
++ unsigned byteCount:10;
++ unsigned objectId:18;
++ unsigned ecc:12;
++ unsigned deleted:1;
++ unsigned unusedStuff:1;
++ unsigned shouldBeFF;
++
++} yaffs_PackedTags1;
++
++
++
++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t);
++void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt);
++#endif
++
++
+diff --git a/fs/yaffs/yaffs_packedtags2.c b/fs/yaffs/yaffs_packedtags2.c
+new file mode 100644
+index 0000000..f4de18d
+--- /dev/null
++++ b/fs/yaffs/yaffs_packedtags2.c
+@@ -0,0 +1,164 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * yaffs_packedtags2.c: Tags packing for YAFFS2
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ *
++ * 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.
++ */
++
++#include "yaffs_packedtags2.h"
++#include "yportenv.h"
++#include "yaffs_tagsvalidity.h"
++
++
++
++// This code packs a set of extended tags into a binary structure for NAND storage
++
++// Some of the information is "extra" struff which can be packed in to speed scanning
++// This is defined by having the EXTRA_HEADER_INFO_FLAG set.
++
++
++// Extra flags applied to chunkId
++
++#define EXTRA_HEADER_INFO_FLAG 0x80000000
++#define EXTRA_SHRINK_FLAG 0x40000000
++#define EXTRA_SHADOWS_FLAG 0x20000000
++#define EXTRA_SPARE_FLAGS 0x10000000
++
++#define ALL_EXTRA_FLAGS 0xF0000000
++
++
++
++// Also, the top 4 bits of the object Id are set to the object type.
++#define EXTRA_OBJECT_TYPE_SHIFT (28)
++#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
++
++
++
++static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
++{
++ T(YAFFS_TRACE_MTD,(TSTR("packed tags obj %d chunk %d byte %d seq %d"TENDSTR),pt->t.objectId,pt->t.chunkId,pt->t.byteCount,pt->t.sequenceNumber));
++}
++
++static void yaffs_DumpTags2(const yaffs_ExtendedTags *t)
++{
++ T(YAFFS_TRACE_MTD,(TSTR("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d"TENDSTR),
++ t->eccResult, t->blockBad, t->chunkUsed, t->objectId, t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, t->sequenceNumber));
++
++}
++
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
++{
++ pt->t.chunkId = t->chunkId;
++ pt->t.sequenceNumber = t->sequenceNumber;
++ pt->t.byteCount = t->byteCount;
++ pt->t.objectId = t->objectId;
++
++ if(t->chunkId == 0 && t->extraHeaderInfoAvailable)
++ {
++ // Store the extra header info instead
++ pt->t.chunkId = EXTRA_HEADER_INFO_FLAG | t->extraParentObjectId; // We save the parent object in the chunkId
++ if(t->extraIsShrinkHeader)
++ {
++ pt->t.chunkId |= EXTRA_SHRINK_FLAG;
++ }
++ if(t->extraShadows)
++ {
++ pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
++ }
++
++ pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK;
++ pt->t.objectId |= (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
++
++ if(t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
++ {
++ pt->t.byteCount = t->extraEquivalentObjectId;
++ }
++ else if(t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
++ {
++ pt->t.byteCount = t->extraFileLength;
++ }
++ else
++ {
++ pt->t.byteCount = 0;
++ }
++ }
++
++ yaffs_DumpPackedTags2(pt);
++ yaffs_DumpTags2(t);
++
++#ifndef YAFFS_IGNORE_TAGS_ECC
++ {
++ yaffs_ECCCalculateOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&pt->ecc);
++ }
++#endif
++}
++
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
++{
++
++
++ memset(t,0,sizeof(yaffs_ExtendedTags));
++
++ yaffs_InitialiseTags(t);
++
++ if(pt->t.sequenceNumber != 0xFFFFFFFF)
++ {
++ // Page is in use
++#ifdef YAFFS_IGNORE_TAGS_ECC
++ {
++ t->eccResult = 0;
++ }
++#else
++ {
++ yaffs_ECCOther ecc;
++ yaffs_ECCCalculateOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&ecc);
++ t->eccResult = yaffs_ECCCorrectOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&pt->ecc,&ecc);
++ }
++#endif
++ t->blockBad = 0;
++ t->chunkUsed = 1;
++ t->objectId = pt->t.objectId;
++ t->chunkId = pt->t.chunkId;
++ t->byteCount = pt->t.byteCount;
++ t->chunkDeleted = 0;
++ t->serialNumber = 0;
++ t->sequenceNumber = pt->t.sequenceNumber;
++
++ // Do extra header info stuff
++
++ if(pt->t.chunkId & EXTRA_HEADER_INFO_FLAG)
++ {
++ t->chunkId = 0;
++ t->byteCount = 0;
++
++ t->extraHeaderInfoAvailable = 1;
++ t->extraParentObjectId = pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
++ t->extraIsShrinkHeader = (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
++ t->extraShadows = (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
++ t->extraObjectType = pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
++ t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
++
++ if(t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
++ {
++ t->extraEquivalentObjectId = pt->t.byteCount;
++ }
++ else
++ {
++ t->extraFileLength = pt->t.byteCount;
++ }
++ }
++ }
++
++ yaffs_DumpPackedTags2(pt);
++ yaffs_DumpTags2(t);
++
++}
++
+diff --git a/fs/yaffs/yaffs_packedtags2.h b/fs/yaffs/yaffs_packedtags2.h
+new file mode 100644
+index 0000000..564dd58
+--- /dev/null
++++ b/fs/yaffs/yaffs_packedtags2.h
+@@ -0,0 +1,30 @@
++// This is used to pack YAFFS2 tags, not YAFFS1tags.
++
++#ifndef __YAFFS_PACKEDTAGS2_H__
++#define __YAFFS_PACKEDTAGS2_H__
++
++
++#include "yaffs_guts.h"
++#include "yaffs_ecc.h"
++
++
++typedef struct
++{
++ unsigned sequenceNumber;
++ unsigned objectId;
++ unsigned chunkId;
++ unsigned byteCount;
++} yaffs_PackedTags2TagsPart;
++
++typedef struct
++{
++ yaffs_PackedTags2TagsPart t;
++ yaffs_ECCOther ecc;
++} yaffs_PackedTags2;
++
++
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
++#endif
++
++
+diff --git a/fs/yaffs/yaffs_tagscompat.c b/fs/yaffs/yaffs_tagscompat.c
+new file mode 100644
+index 0000000..fdf1cbc
+--- /dev/null
++++ b/fs/yaffs/yaffs_tagscompat.c
+@@ -0,0 +1,698 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_tagscompat.h: Tags compatability layer to use YAFFS1 formatted NAND.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * $Id: yaffs_tagscompat.c,v 1.3 2005/07/31 06:47:12 marty Exp $
++ */
++
++#include "yaffs_guts.h"
++#include "yaffs_tagscompat.h"
++#include "yaffs_ecc.h"
++
++static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
++#ifdef NOTYET
++static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND);
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare);
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_Spare *spare);
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
++#endif
++
++
++static const char yaffs_countBitsTable[256] =
++{
++0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
++4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
++};
++
++static int yaffs_CountBits(__u8 x)
++{
++ int retVal;
++ retVal = yaffs_countBitsTable[x];
++ return retVal;
++}
++
++
++/////////////// Tags ECC calculations ///////////////////
++
++void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
++{
++ yaffs_ECCCalculate(data , spare->ecc1);
++ yaffs_ECCCalculate(&data[256] , spare->ecc2);
++}
++
++void yaffs_CalcTagsECC(yaffs_Tags *tags)
++{
++ // Calculate an ecc
++
++ unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
++ unsigned i,j;
++ unsigned ecc = 0;
++ unsigned bit = 0;
++
++ tags->ecc = 0;
++
++ for(i = 0; i < 8; i++)
++ {
++ for(j = 1; j &0xff; j<<=1)
++ {
++ bit++;
++ if(b[i] & j)
++ {
++ ecc ^= bit;
++ }
++ }
++ }
++
++ tags->ecc = ecc;
++
++
++}
++
++int yaffs_CheckECCOnTags(yaffs_Tags *tags)
++{
++ unsigned ecc = tags->ecc;
++
++ yaffs_CalcTagsECC(tags);
++
++ ecc ^= tags->ecc;
++
++ if(ecc && ecc <= 64)
++ {
++ // TODO: Handle the failure better. Retire?
++ unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
++
++ ecc--;
++
++ b[ecc / 8] ^= (1 << (ecc & 7));
++
++ // Now recvalc the ecc
++ yaffs_CalcTagsECC(tags);
++
++ return 1; // recovered error
++ }
++ else if(ecc)
++ {
++ // Wierd ecc failure value
++ // TODO Need to do somethiong here
++ return -1; //unrecovered error
++ }
++
++ return 0;
++}
++
++//////////////////////////// Tags ///////////////////////////////////////
++
++static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
++
++ yaffs_CalcTagsECC(tagsPtr);
++
++ sparePtr->tagByte0 = tu->asBytes[0];
++ sparePtr->tagByte1 = tu->asBytes[1];
++ sparePtr->tagByte2 = tu->asBytes[2];
++ sparePtr->tagByte3 = tu->asBytes[3];
++ sparePtr->tagByte4 = tu->asBytes[4];
++ sparePtr->tagByte5 = tu->asBytes[5];
++ sparePtr->tagByte6 = tu->asBytes[6];
++ sparePtr->tagByte7 = tu->asBytes[7];
++}
++
++static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
++{
++ yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
++ int result;
++
++ tu->asBytes[0]= sparePtr->tagByte0;
++ tu->asBytes[1]= sparePtr->tagByte1;
++ tu->asBytes[2]= sparePtr->tagByte2;
++ tu->asBytes[3]= sparePtr->tagByte3;
++ tu->asBytes[4]= sparePtr->tagByte4;
++ tu->asBytes[5]= sparePtr->tagByte5;
++ tu->asBytes[6]= sparePtr->tagByte6;
++ tu->asBytes[7]= sparePtr->tagByte7;
++
++ result = yaffs_CheckECCOnTags(tagsPtr);
++ if(result> 0)
++ {
++ dev->tagsEccFixed++;
++ }
++ else if(result <0)
++ {
++ dev->tagsEccUnfixed++;
++ }
++}
++
++static void yaffs_SpareInitialise(yaffs_Spare *spare)
++{
++ memset(spare,0xFF,sizeof(yaffs_Spare));
++}
++
++
++
++
++static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare)
++{
++ if(chunkInNAND < dev->startBlock * dev->nChunksPerBlock)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND));
++ return YAFFS_FAIL;
++ }
++
++ dev->nPageWrites++;
++ return dev->writeChunkToNAND(dev,chunkInNAND,data,spare);
++}
++
++
++
++static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND,
++ __u8 *data,
++ yaffs_Spare *spare,
++ yaffs_ECCResult *eccResult,
++ int doErrorCorrection)
++{
++ int retVal;
++ yaffs_Spare localSpare;
++
++ dev->nPageReads++;
++
++
++
++
++ if(!spare && data)
++ {
++ // If we don't have a real spare, then we use a local one.
++ // Need this for the calculation of the ecc
++ spare = &localSpare;
++ }
++
++
++ if(!dev->useNANDECC)
++ {
++ retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare);
++ if(data && doErrorCorrection)
++ {
++ // Do ECC correction
++ //Todo handle any errors
++ int eccResult1,eccResult2;
++ __u8 calcEcc[3];
++
++ yaffs_ECCCalculate(data,calcEcc);
++ eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
++ yaffs_ECCCalculate(&data[256],calcEcc);
++ eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
++
++ if(eccResult1>0)
++ {
++ T(YAFFS_TRACE_ERROR, (TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
++ dev->eccFixed++;
++ }
++ else if(eccResult1<0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
++ dev->eccUnfixed++;
++ }
++
++ if(eccResult2>0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
++ dev->eccFixed++;
++ }
++ else if(eccResult2<0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
++ dev->eccUnfixed++;
++ }
++
++ if(eccResult1 || eccResult2)
++ {
++ // Hoosterman, we had a data problem on this page
++ yaffs_HandleReadDataError(dev,chunkInNAND);
++ }
++
++ if(eccResult1 < 0 || eccResult2 < 0)
++ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ else if(eccResult1 > 0 || eccResult2 > 0)
++ *eccResult = YAFFS_ECC_RESULT_FIXED;
++ else
++ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++ }
++ }
++ else
++ {
++ // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device.
++ struct yaffs_NANDSpare nspare;
++ retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
++ memcpy (spare, &nspare, sizeof(yaffs_Spare));
++ if(data && doErrorCorrection)
++ {
++ if(nspare.eccres1>0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
++ }
++ else if(nspare.eccres1<0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
++ }
++
++ if(nspare.eccres2>0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
++ }
++ else if(nspare.eccres2<0)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
++ }
++
++ if(nspare.eccres1 || nspare.eccres2)
++ {
++ // Hoosterman, we had a data problem on this page
++ yaffs_HandleReadDataError(dev,chunkInNAND);
++ }
++
++ if(nspare.eccres1 < 0 || nspare.eccres2 < 0)
++ *eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ else if(nspare.eccres1 > 0 || nspare.eccres2 > 0)
++ *eccResult = YAFFS_ECC_RESULT_FIXED;
++ else
++ *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
++
++
++ }
++ }
++ return retVal;
++}
++
++#ifdef NOTYET
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
++{
++
++ static int init = 0;
++ static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
++ static __u8 data[YAFFS_BYTES_PER_CHUNK];
++ // Might as well always allocate the larger size for dev->useNANDECC == true;
++ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
++
++ dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
++
++ if(!init)
++ {
++ memset(cmpbuf,0xff,YAFFS_BYTES_PER_CHUNK);
++ init = 1;
++ }
++
++ if(memcmp(cmpbuf,data,YAFFS_BYTES_PER_CHUNK)) return YAFFS_FAIL;
++ if(memcmp(cmpbuf,spare,16)) return YAFFS_FAIL;
++
++
++ return YAFFS_OK;
++
++}
++#endif
++
++#if 0
++int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
++{
++ dev->nBlockErasures++;
++ return dev->eraseBlockInNAND(dev,blockInNAND);
++}
++
++int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
++{
++ return dev->initialiseNAND(dev);
++}
++
++#endif
++
++#if 0
++static int yaffs_WriteNewChunkToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_Spare *spare,int useReserve)
++{
++ int chunk;
++
++ int writeOk = 1;
++ int attempts = 0;
++
++ unsigned char rbData[YAFFS_BYTES_PER_CHUNK];
++ yaffs_Spare rbSpare;
++
++ do{
++ chunk = yaffs_AllocateChunk(dev,useReserve);
++
++ if(chunk >= 0)
++ {
++
++ // First check this chunk is erased...
++#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
++ writeOk = yaffs_CheckChunkErased(dev,chunk);
++#endif
++ if(!writeOk)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
++ }
++ else
++ {
++ writeOk = yaffs_WriteChunkToNAND(dev,chunk,data,spare);
++ }
++ attempts++;
++ if(writeOk)
++ {
++ // Readback & verify
++ // If verify fails, then delete this chunk and try again
++ // To verify we compare everything except the block and
++ // page status bytes.
++ // NB We check a raw read without ECC correction applied
++ yaffs_ReadChunkFromNAND(dev,chunk,rbData,&rbSpare,0);
++
++#ifndef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
++ if(!yaffs_VerifyCompare(data,rbData,spare,&rbSpare))
++ {
++ // Didn't verify
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write verify failed on chunk %d" TENDSTR), chunk));
++
++ writeOk = 0;
++ }
++#endif
++
++ }
++ if(writeOk)
++ {
++ // Copy the data into the write buffer.
++ // NB We do this at the end to prevent duplicates in the case of a write error.
++ //Todo
++ yaffs_HandleWriteChunkOk(dev,chunk,data,spare);
++ }
++ else
++ {
++ yaffs_HandleWriteChunkError(dev,chunk);
++ }
++ }
++
++ } while(chunk >= 0 && ! writeOk);
++
++ if(attempts > 1)
++ {
++ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
++ dev->nRetriedWrites+= (attempts - 1);
++ }
++
++ return chunk;
++}
++
++#endif
++
++///
++// Functions for robustisizing
++//
++//
++#if 0
++
++static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
++{
++ // Ding the blockStatus in the first two pages of the block.
++
++ yaffs_Spare spare;
++
++ memset(&spare, 0xff,sizeof(yaffs_Spare));
++
++ spare.blockStatus = 0;
++
++ // TODO change this retirement marking for other NAND types
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL , &spare);
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, NULL , &spare);
++
++ yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
++ dev->nRetiredBlocks++;
++}
++
++#endif
++
++#if 0
++static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
++{
++ dev->doingBufferedBlockRewrite = 1;
++ //
++ // Remove erased chunks
++ // Rewrite existing chunks to a new block
++ // Set current write block to the new block
++
++ dev->doingBufferedBlockRewrite = 0;
++
++ return 1;
++}
++
++#endif
++
++static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
++
++ // Mark the block for retirement
++ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
++
++
++ //TODO
++ // Just do a garbage collection on the affected block then retire the block
++ // NB recursion
++}
++
++
++#ifdef NOTYET
++static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
++{
++}
++
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare)
++{
++}
++
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_Spare *spare)
++{
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
++{
++ int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
++
++ // Mark the block for retirement
++ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
++ // Delete the chunk
++ yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
++}
++
++
++
++
++static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1)
++{
++
++
++ if( memcmp(d0,d1,YAFFS_BYTES_PER_CHUNK) != 0 ||
++ s0->tagByte0 != s1->tagByte0 ||
++ s0->tagByte1 != s1->tagByte1 ||
++ s0->tagByte2 != s1->tagByte2 ||
++ s0->tagByte3 != s1->tagByte3 ||
++ s0->tagByte4 != s1->tagByte4 ||
++ s0->tagByte5 != s1->tagByte5 ||
++ s0->tagByte6 != s1->tagByte6 ||
++ s0->tagByte7 != s1->tagByte7 ||
++ s0->ecc1[0] != s1->ecc1[0] ||
++ s0->ecc1[1] != s1->ecc1[1] ||
++ s0->ecc1[2] != s1->ecc1[2] ||
++ s0->ecc2[0] != s1->ecc2[0] ||
++ s0->ecc2[1] != s1->ecc2[1] ||
++ s0->ecc2[2] != s1->ecc2[2] )
++ {
++ return 0;
++ }
++
++ return 1;
++}
++#endif /* NOTYET */
++
++#if 0
++typedef struct
++{
++
++ unsigned validMarker0;
++ unsigned chunkUsed; // Status of the chunk: used or unused
++ unsigned objectId; // If 0 then this is not part of an object (unused)
++ unsigned chunkId; // If 0 then this is a header
++ unsigned byteCount; // Only valid for data chunks
++ // The following stuff only has meaning when we read
++ yaffs_ECCResult eccResult; // Only valid when we read.
++ unsigned blockBad; // Only valid on reading
++
++ // YAFFS 1 stuff
++ unsigned chunkDeleted; // The chunk is marked deleted
++ unsigned serialNumber; // Yaffs1 2-bit serial number
++
++ // YAFFS2 stuff
++ unsigned sequenceNumber; // The sequence number of this block
++
++ unsigned validMarker1;
++
++} yaffs_ExtendedTags;
++
++
++typedef struct
++{
++ unsigned chunkId:20;
++ unsigned serialNumber:2;
++ unsigned byteCount:10;
++ unsigned objectId:18;
++ unsigned ecc:12;
++ unsigned unusedStuff:2;
++} yaffs_Tags;
++
++
++#endif
++
++int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *eTags)
++{
++ yaffs_Spare spare;
++ yaffs_Tags tags;
++
++ yaffs_SpareInitialise(&spare);
++
++ if(eTags->chunkDeleted)
++ {
++ spare.pageStatus = 0;
++ }
++ else
++ {
++ tags.objectId = eTags->objectId;
++ tags.chunkId = eTags->chunkId;
++ tags.byteCount = eTags->byteCount;
++ tags.serialNumber = eTags->serialNumber;
++
++// NCB
++ if (!dev->useNANDECC && data)
++ {
++ yaffs_CalcECC(data,&spare);
++ }
++
++// /NCB
++ yaffs_LoadTagsIntoSpare(&spare,&tags);
++
++ }
++
++ return yaffs_WriteChunkToNAND(dev,chunkInNAND,data,&spare);
++}
++
++
++int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *eTags)
++{
++
++ yaffs_Spare spare;
++ yaffs_Tags tags;
++ yaffs_ECCResult eccResult;
++
++// NCB
++ static yaffs_Spare spareFF;
++ static int init;
++
++ if(!init)
++ {
++ memset(&spareFF,0xFF,sizeof(spareFF));
++ init = 1;
++ }
++// /NCB
++ if(yaffs_ReadChunkFromNAND(dev,chunkInNAND,data,&spare,&eccResult,1))
++ {
++// added NCB - eTags may be NULL
++ if (eTags) {
++
++ int deleted = (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
++
++ yaffs_GetTagsFromSpare(dev,&spare,&tags);
++
++ eTags->chunkDeleted = deleted;
++ eTags->objectId = tags.objectId;
++ eTags->chunkId = tags.chunkId;
++ eTags->byteCount = tags.byteCount;
++ eTags->serialNumber = tags.serialNumber;
++ eTags->eccResult = eccResult;
++ eTags->blockBad = 0; // We're reading it therefore it is not a bad block
++
++// NCB added 18/2/2005
++ eTags->chunkUsed = (memcmp(&spareFF,&spare,sizeof(spareFF)) != 0) ? 1:0;
++ }
++
++ return YAFFS_OK;
++ }
++ else
++ {
++ return YAFFS_FAIL;
++ }
++}
++
++int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockInNAND)
++{
++
++ yaffs_Spare spare;
++
++ memset(&spare, 0xff,sizeof(yaffs_Spare));
++
++ spare.blockStatus = 0;
++
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL , &spare);
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, NULL , &spare);
++
++ return YAFFS_OK;
++
++}
++
++
++int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber)
++{
++
++ yaffs_Spare spare0,spare1;
++ static yaffs_Spare spareFF;
++ static int init;
++ yaffs_ECCResult dummy;
++
++ if(!init)
++ {
++ memset(&spareFF,0xFF,sizeof(spareFF));
++ init = 1;
++ }
++
++ *sequenceNumber = 0;
++
++ yaffs_ReadChunkFromNAND(dev,blockNo * dev->nChunksPerBlock,NULL,&spare0,&dummy,1);
++ yaffs_ReadChunkFromNAND(dev,blockNo * dev->nChunksPerBlock + 1,NULL,&spare1,&dummy,1);
++
++ if(yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
++ *state = YAFFS_BLOCK_STATE_DEAD;
++ else if(memcmp(&spareFF,&spare0,sizeof(spareFF)) == 0)
++ *state = YAFFS_BLOCK_STATE_EMPTY;
++ else
++ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
++
++ return YAFFS_OK;
++}
++
+diff --git a/fs/yaffs/yaffs_tagscompat.h b/fs/yaffs/yaffs_tagscompat.h
+new file mode 100644
+index 0000000..20b627f
+--- /dev/null
++++ b/fs/yaffs/yaffs_tagscompat.h
+@@ -0,0 +1,30 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffs_ramdisk.h: yaffs ram disk component
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * $Id: yaffs_tagscompat.h,v 1.1 2004/11/03 08:14:07 charles Exp $
++ */
++
++// This provides a rma disk under yaffs.
++// NB this is not intended for NAND emulation.
++// Use this with dev->useNANDECC enabled, then ECC overheads are not required.
++
++#ifndef __YAFFS_TAGSCOMPAT_H__
++#define __YAFFS_TAGSCOMPAT_H__
++
++
++#include "yaffs_guts.h"
++int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags);
++int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags);
++int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
++int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber);
++
++#endif
+diff --git a/fs/yaffs/yaffs_tagsvalidity.c b/fs/yaffs/yaffs_tagsvalidity.c
+new file mode 100644
+index 0000000..2cbbeaa
+--- /dev/null
++++ b/fs/yaffs/yaffs_tagsvalidity.c
+@@ -0,0 +1,35 @@
++
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * $Id: yaffs_tagsvalidity.c,v 1.1 2005/04/29 18:09:16 charles Exp $
++ */
++//yaffs_tagsvalidity.c
++
++#include "yaffs_tagsvalidity.h"
++
++
++
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
++{
++ memset(tags,0,sizeof(yaffs_ExtendedTags));
++ tags->validMarker0 = 0xAAAAAAAA;
++ tags->validMarker1 = 0x55555555;
++}
++
++int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
++{
++ return (tags->validMarker0 == 0xAAAAAAAA &&
++ tags->validMarker1 == 0x55555555);
++
++}
++
+diff --git a/fs/yaffs/yaffs_tagsvalidity.h b/fs/yaffs/yaffs_tagsvalidity.h
+new file mode 100644
+index 0000000..26673d1
+--- /dev/null
++++ b/fs/yaffs/yaffs_tagsvalidity.h
+@@ -0,0 +1,27 @@
++
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * $Id: yaffs_tagsvalidity.h,v 1.1 2005/04/29 18:09:16 charles Exp $
++ */
++//yaffs_tagsvalidity.h
++
++
++#ifndef __YAFFS_TAGS_VALIDITY_H__
++#define __YAFFS_TAGS_VALIDITY_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
++int yaffs_ValidateTags(yaffs_ExtendedTags *tags);
++#endif
++
+diff --git a/fs/yaffs/yaffsinterface.h b/fs/yaffs/yaffsinterface.h
+new file mode 100644
+index 0000000..e4b0ff1
+--- /dev/null
++++ b/fs/yaffs/yaffsinterface.h
+@@ -0,0 +1,25 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yaffsinterface.h: Interface to the guts of yaffs.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ */
++
++#ifndef __YAFFSINTERFACE_H__
++#define __YAFFSINTERFACE_H__
++
++
++int yaffs_Initialise(unsigned nBlocks);
++
++#endif
++
+diff --git a/fs/yaffs/yportenv.h b/fs/yaffs/yportenv.h
+new file mode 100644
+index 0000000..13c63bb
+--- /dev/null
++++ b/fs/yaffs/yportenv.h
+@@ -0,0 +1,165 @@
++/*
++ * YAFFS: Yet another FFS. A NAND-flash specific file system.
++ * yportenv.h: Portable services used by yaffs. This is done to allow
++ * simple migration from kernel space into app space for testing.
++ *
++ * Copyright (C) 2002 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * $Id: yportenv.h,v 1.6 2005/07/31 00:26:57 charles Exp $
++ *
++ */
++
++#ifndef __YPORTENV_H__
++#define __YPORTENV_H__
++
++
++#if defined CONFIG_YAFFS_WINCE
++
++#include "ywinceenv.h"
++
++#elif defined __KERNEL__
++
++
++
++// Linux kernel
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/version.h>
++#include <linux/mm.h>
++#include <linux/string.h>
++#include <linux/slab.h>
++
++#define YCHAR char
++#define YUCHAR unsigned char
++#define _Y(x) x
++#define yaffs_strcpy(a,b) strcpy(a,b)
++#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
++#define yaffs_strlen(s) strlen(s)
++#define yaffs_sprintf sprintf
++#define yaffs_toupper(a) toupper(a)
++
++#define Y_INLINE inline
++
++#define YAFFS_LOSTNFOUND_NAME "lost+found"
++#define YAFFS_LOSTNFOUND_PREFIX "obj"
++
++//#define YPRINTF(x) printk x
++#define YMALLOC(x) kmalloc(x,GFP_KERNEL)
++#define YFREE(x) kfree(x)
++
++#define YAFFS_ROOT_MODE 0666
++#define YAFFS_LOSTNFOUND_MODE 0666
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
++#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
++#define Y_TIME_CONVERT(x) (x).tv_sec
++#else
++#define Y_CURRENT_TIME CURRENT_TIME
++#define Y_TIME_CONVERT(x) (x)
++#endif
++
++#define yaffs_SumCompare(x,y) ((x) == (y))
++#define yaffs_strcmp(a,b) strcmp(a,b)
++
++#define TENDSTR "\n"
++#define TSTR(x) KERN_WARNING x
++#define TOUT(p) printk p
++
++
++#elif defined CONFIG_YAFFS_DIRECT
++
++// Direct interface
++#include "ydirectenv.h"
++
++#elif defined CONFIG_YAFFS_UTIL
++
++// Stuff for YAFFS utilities
++
++#include "stdlib.h"
++#include "stdio.h"
++#include "string.h"
++
++#include "devextras.h"
++
++#define YMALLOC(x) malloc(x)
++#define YFREE(x) free(x)
++
++
++#define YCHAR char
++#define YUCHAR unsigned char
++#define _Y(x) x
++#define yaffs_strcpy(a,b) strcpy(a,b)
++#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
++#define yaffs_strlen(s) strlen(s)
++#define yaffs_sprintf sprintf
++#define yaffs_toupper(a) toupper(a)
++
++#define Y_INLINE inline
++
++//#define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s))
++//#define YALERT(s) YINFO(s)
++
++
++#define TENDSTR "\n"
++#define TSTR(x) x
++#define TOUT(p) printf p
++
++
++#define YAFFS_LOSTNFOUND_NAME "lost+found"
++#define YAFFS_LOSTNFOUND_PREFIX "obj"
++//#define YPRINTF(x) printf x
++
++
++#define YAFFS_ROOT_MODE 0666
++#define YAFFS_LOSTNFOUND_MODE 0666
++
++#define yaffs_SumCompare(x,y) ((x) == (y))
++#define yaffs_strcmp(a,b) strcmp(a,b)
++
++#else
++// Should have specified a configuration type
++#error Unknown configuration
++
++#endif
++
++
++extern unsigned yaffs_traceMask;
++
++#define YAFFS_TRACE_ERROR 0x00000001
++#define YAFFS_TRACE_OS 0x00000002
++#define YAFFS_TRACE_ALLOCATE 0x00000004
++#define YAFFS_TRACE_SCAN 0x00000008
++#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
++#define YAFFS_TRACE_ERASE 0x00000020
++#define YAFFS_TRACE_GC 0x00000040
++#define YAFFS_TRACE_WRITE 0x00000080
++#define YAFFS_TRACE_TRACING 0x00000100
++#define YAFFS_TRACE_DELETION 0x00000200
++#define YAFFS_TRACE_BUFFERS 0x00000400
++#define YAFFS_TRACE_NANDACCESS 0x00000800
++#define YAFFS_TRACE_GC_DETAIL 0x00001000
++#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
++#define YAFFS_TRACE_MTD 0x00004000
++#define YAFFS_TRACE_ALWAYS 0x40000000
++#define YAFFS_TRACE_BUG 0x80000000
++
++#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ERROR)) TOUT(p);} while(0)
++
++
++#ifndef CONFIG_YAFFS_WINCE
++#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__))
++#endif
++
++#endif
++
++
+
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