diff options
| author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-10-10 18:05:48 +0000 |
|---|---|---|
| committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-10-10 18:05:48 +0000 |
| commit | b78fbb9510cb5f9b682ffa1e59249f1c3429ea34 (patch) | |
| tree | 35d1b80970bc9582e6bdbd7d0a3abecc81dda981 /target/linux/generic-2.6/patches | |
| parent | 76d4ca5d5056998ade5e27262b640d9bbad0d72d (diff) | |
[kernel] dissect yaffs patch
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9249 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic-2.6/patches')
| -rw-r--r-- | target/linux/generic-2.6/patches/510-Yaffs.patch | 15002 |
1 files changed, 0 insertions, 15002 deletions
diff --git a/target/linux/generic-2.6/patches/510-Yaffs.patch b/target/linux/generic-2.6/patches/510-Yaffs.patch index 99775d750e..255c3a8a35 100644 --- a/target/linux/generic-2.6/patches/510-Yaffs.patch +++ b/target/linux/generic-2.6/patches/510-Yaffs.patch @@ -17,15005 +17,3 @@ diff -urN linux-2.6.21.1/fs/Makefile linux-2.6.21.1.new/fs/Makefile obj-$(CONFIG_OCFS2_FS) += ocfs2/ obj-$(CONFIG_GFS2_FS) += gfs2/ +obj-$(CONFIG_YAFFS_FS) += yaffs2/ -diff -urN linux-2.6.21.1/fs/yaffs2/Kconfig linux-2.6.21.1.new/fs/yaffs2/Kconfig ---- linux-2.6.21.1/fs/yaffs2/Kconfig 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/Kconfig 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,175 @@ -+# -+# YAFFS file system configurations -+# -+ -+config YAFFS_FS -+ tristate "YAFFS2 file system support" -+ default n -+ depends on MTD -+ select YAFFS_YAFFS1 -+ select YAFFS_YAFFS2 -+ help -+ YAFFS2, or Yet Another Flash Filing System, is a filing system -+ optimised for NAND Flash chips. -+ -+ To compile the YAFFS2 file system support as a module, choose M -+ here: the module will be called yaffs2. -+ -+ If unsure, say N. -+ -+ Further information on YAFFS2 is available at -+ <http://www.aleph1.co.uk/yaffs/>. -+ -+config YAFFS_YAFFS1 -+ bool "512 byte / page devices" -+ depends on YAFFS_FS -+ default y -+ help -+ Enable YAFFS1 support -- yaffs for 512 byte / page devices -+ -+ Not needed for 2K-page devices. -+ -+ If unsure, say Y. -+ -+config YAFFS_9BYTE_TAGS -+ bool "Use older-style on-NAND data format with pageStatus byte" -+ depends on YAFFS_YAFFS1 -+ default n -+ help -+ -+ Older-style on-NAND data format has a "pageStatus" byte to record -+ chunk/page state. This byte is zero when the page is discarded. -+ Choose this option if you have existing on-NAND data using this -+ format that you need to continue to support. New data written -+ also uses the older-style format. Note: Use of this option -+ generally requires that MTD's oob layout be adjusted to use the -+ older-style format. See notes on tags formats and MTD versions. -+ -+ If unsure, say N. -+ -+config YAFFS_DOES_ECC -+ bool "Lets Yaffs do its own ECC" -+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS -+ default n -+ help -+ This enables Yaffs to use its own ECC functions instead of using -+ the ones from the generic MTD-NAND driver. -+ -+ If unsure, say N. -+ -+config YAFFS_ECC_WRONG_ORDER -+ bool "Use the same ecc byte order as Steven Hill's nand_ecc.c" -+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS -+ default n -+ help -+ This makes yaffs_ecc.c use the same ecc byte order as Steven -+ Hill's nand_ecc.c. If not set, then you get the same ecc byte -+ order as SmartMedia. -+ -+ If unsure, say N. -+ -+config YAFFS_YAFFS2 -+ bool "2048 byte (or larger) / page devices" -+ depends on YAFFS_FS -+ default y -+ help -+ Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices -+ -+ If unsure, say Y. -+ -+config YAFFS_AUTO_YAFFS2 -+ bool "Autoselect yaffs2 format" -+ depends on YAFFS_YAFFS2 -+ default y -+ help -+ Without this, you need to explicitely use yaffs2 as the file -+ system type. With this, you can say "yaffs" and yaffs or yaffs2 -+ will be used depending on the device page size (yaffs on -+ 512-byte page devices, yaffs2 on 2K page devices). -+ -+ If unsure, say Y. -+ -+config YAFFS_DISABLE_LAZY_LOAD -+ bool "Disable lazy loading" -+ depends on YAFFS_YAFFS2 -+ default n -+ help -+ "Lazy loading" defers loading file details until they are -+ required. This saves mount time, but makes the first look-up -+ a bit longer. -+ -+ Lazy loading will only happen if enabled by this option being 'n' -+ and if the appropriate tags are available, else yaffs2 will -+ automatically fall back to immediate loading and do the right -+ thing. -+ -+ Lazy laoding will be required by checkpointing. -+ -+ Setting this to 'y' will disable lazy loading. -+ -+ If unsure, say N. -+ -+config YAFFS_CHECKPOINT_RESERVED_BLOCKS -+ int "Reserved blocks for checkpointing" -+ depends on YAFFS_YAFFS2 -+ default 10 -+ help -+ Give the number of Blocks to reserve for checkpointing. -+ Checkpointing saves the state at unmount so that mounting is -+ much faster as a scan of all the flash to regenerate this state -+ is not needed. These Blocks are reserved per partition, so if -+ you have very small partitions the default (10) may be a mess -+ for you. You can set this value to 0, but that does not mean -+ checkpointing is disabled at all. There only won't be any -+ specially reserved blocks for checkpointing, so if there is -+ enough free space on the filesystem, it will be used for -+ checkpointing. -+ -+ If unsure, leave at default (10), but don't wonder if there are -+ always 2MB used on your large page device partition (10 x 2k -+ pagesize). When using small partitions or when being very small -+ on space, you probably want to set this to zero. -+ -+config YAFFS_DISABLE_WIDE_TNODES -+ bool "Turn off wide tnodes" -+ depends on YAFFS_FS -+ default n -+ help -+ Wide tnodes are only used for NAND arrays >=32MB for 512-byte -+ page devices and >=128MB for 2k page devices. They use slightly -+ more RAM but are faster since they eliminate chunk group -+ searching. -+ -+ Setting this to 'y' will force tnode width to 16 bits and save -+ memory but make large arrays slower. -+ -+ If unsure, say N. -+ -+config YAFFS_ALWAYS_CHECK_CHUNK_ERASED -+ bool "Force chunk erase check" -+ depends on YAFFS_FS -+ default n -+ help -+ Normally YAFFS only checks chunks before writing until an erased -+ chunk is found. This helps to detect any partially written -+ chunks that might have happened due to power loss. -+ -+ Enabling this forces on the test that chunks are erased in flash -+ before writing to them. This takes more time but is potentially -+ a bit more secure. -+ -+ Suggest setting Y during development and ironing out driver -+ issues etc. Suggest setting to N if you want faster writing. -+ -+ If unsure, say Y. -+ -+config YAFFS_SHORT_NAMES_IN_RAM -+ bool "Cache short names in RAM" -+ depends on YAFFS_FS -+ default y -+ help -+ If this config is set, then short names are stored with the -+ yaffs_Object. This costs an extra 16 bytes of RAM per object, -+ but makes look-ups faster. -+ -+ If unsure, say Y. -diff -urN linux-2.6.21.1/fs/yaffs2/Makefile linux-2.6.21.1.new/fs/yaffs2/Makefile ---- linux-2.6.21.1/fs/yaffs2/Makefile 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/Makefile 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,11 @@ -+# -+# Makefile for the linux YAFFS filesystem routines. -+# -+ -+obj-$(CONFIG_YAFFS_FS) += yaffs.o -+ -+yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o -+yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o -+yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o -+yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o -+yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o -diff -urN linux-2.6.21.1/fs/yaffs2/devextras.h linux-2.6.21.1.new/fs/yaffs2/devextras.h ---- linux-2.6.21.1/fs/yaffs2/devextras.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/devextras.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,264 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+/* -+ * This 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. -+ * -+ */ -+ -+#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 -urN linux-2.6.21.1/fs/yaffs2/moduleconfig.h linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h ---- linux-2.6.21.1/fs/yaffs2/moduleconfig.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/moduleconfig.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,65 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Martin Fouts <Martin.Fouts@palmsource.com> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_CONFIG_H__ -+#define __YAFFS_CONFIG_H__ -+ -+#ifdef YAFFS_OUT_OF_TREE -+ -+/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */ -+#define CONFIG_YAFFS_FS -+#define CONFIG_YAFFS_YAFFS1 -+#define CONFIG_YAFFS_YAFFS2 -+ -+/* These options are independent of each other. Select those that matter. */ -+ -+/* Default: Not selected */ -+/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */ -+//#define CONFIG_YAFFS_DOES_ECC -+ -+/* Default: Not selected */ -+/* Meaning: ECC byte order is 'wrong'. Only meaningful if */ -+/* CONFIG_YAFFS_DOES_ECC is set */ -+//#define CONFIG_YAFFS_ECC_WRONG_ORDER -+ -+/* Default: Selected */ -+/* Meaning: Disables testing whether chunks are erased before writing to them*/ -+#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK -+ -+/* Default: Selected */ -+/* Meaning: Cache short names, taking more RAM, but faster look-ups */ -+#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM -+ -+/* Default: 10 */ -+/* Meaning: set the count of blocks to reserve for checkpointing */ -+#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10 -+ -+/* -+Older-style on-NAND data format has a "pageStatus" byte to record -+chunk/page state. This byte is zeroed when the page is discarded. -+Choose this option if you have existing on-NAND data in this format -+that you need to continue to support. New data written also uses the -+older-style format. -+Note: Use of this option generally requires that MTD's oob layout be -+adjusted to use the older-style format. See notes on tags formats and -+MTD versions. -+*/ -+/* Default: Not selected */ -+/* Meaning: Use older-style on-NAND data format with pageStatus byte */ -+#define CONFIG_YAFFS_9BYTE_TAGS -+ -+#endif /* YAFFS_OUT_OF_TREE */ -+ -+#endif /* __YAFFS_CONFIG_H__ */ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,404 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+const char *yaffs_checkptrw_c_version = -+ "$Id: yaffs_checkptrw.c,v 1.14 2007-05-15 20:07:40 charles Exp $"; -+ -+ -+#include "yaffs_checkptrw.h" -+ -+ -+static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) -+{ -+ -+ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; -+ -+ T(YAFFS_TRACE_CHECKPOINT, -+ (TSTR("checkpt blocks available = %d" TENDSTR), -+ blocksAvailable)); -+ -+ -+ return (blocksAvailable <= 0) ? 0 : 1; -+} -+ -+ -+static int yaffs_CheckpointErase(yaffs_Device *dev) -+{ -+ -+ int i; -+ -+ -+ if(!dev->eraseBlockInNAND) -+ return 0; -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR), -+ dev->internalStartBlock,dev->internalEndBlock)); -+ -+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); -+ if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i)); -+ if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){ -+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY; -+ dev->nErasedBlocks++; -+ dev->nFreeChunks += dev->nChunksPerBlock; -+ } -+ else { -+ dev->markNANDBlockBad(dev,i); -+ bi->blockState = YAFFS_BLOCK_STATE_DEAD; -+ } -+ } -+ } -+ -+ dev->blocksInCheckpoint = 0; -+ -+ return 1; -+} -+ -+ -+static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) -+{ -+ int i; -+ int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; -+ T(YAFFS_TRACE_CHECKPOINT, -+ (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), -+ dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock)); -+ -+ if(dev->checkpointNextBlock >= 0 && -+ dev->checkpointNextBlock <= dev->internalEndBlock && -+ blocksAvailable > 0){ -+ -+ for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); -+ if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){ -+ dev->checkpointNextBlock = i + 1; -+ dev->checkpointCurrentBlock = i; -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i)); -+ return; -+ } -+ } -+ } -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR))); -+ -+ dev->checkpointNextBlock = -1; -+ dev->checkpointCurrentBlock = -1; -+} -+ -+static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) -+{ -+ int i; -+ yaffs_ExtendedTags tags; -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), -+ dev->blocksInCheckpoint, dev->checkpointNextBlock)); -+ -+ if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks) -+ for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ -+ int chunk = i * dev->nChunksPerBlock; -+ int realignedChunk = chunk - dev->chunkOffset; -+ -+ dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags); -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), -+ i, tags.objectId,tags.sequenceNumber,tags.eccResult)); -+ -+ if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){ -+ /* Right kind of block */ -+ dev->checkpointNextBlock = tags.objectId; -+ dev->checkpointCurrentBlock = i; -+ dev->checkpointBlockList[dev->blocksInCheckpoint] = i; -+ dev->blocksInCheckpoint++; -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i)); -+ return; -+ } -+ } -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR))); -+ -+ dev->checkpointNextBlock = -1; -+ dev->checkpointCurrentBlock = -1; -+} -+ -+ -+int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) -+{ -+ -+ /* Got the functions we need? */ -+ if (!dev->writeChunkWithTagsToNAND || -+ !dev->readChunkWithTagsFromNAND || -+ !dev->eraseBlockInNAND || -+ !dev->markNANDBlockBad) -+ return 0; -+ -+ if(forWriting && !yaffs_CheckpointSpaceOk(dev)) -+ return 0; -+ -+ if(!dev->checkpointBuffer) -+ dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk); -+ if(!dev->checkpointBuffer) -+ return 0; -+ -+ -+ dev->checkpointPageSequence = 0; -+ -+ dev->checkpointOpenForWrite = forWriting; -+ -+ dev->checkpointByteCount = 0; -+ dev->checkpointSum = 0; -+ dev->checkpointXor = 0; -+ dev->checkpointCurrentBlock = -1; -+ dev->checkpointCurrentChunk = -1; -+ dev->checkpointNextBlock = dev->internalStartBlock; -+ -+ /* Erase all the blocks in the checkpoint area */ -+ if(forWriting){ -+ memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); -+ dev->checkpointByteOffset = 0; -+ return yaffs_CheckpointErase(dev); -+ -+ -+ } else { -+ int i; -+ /* Set to a value that will kick off a read */ -+ dev->checkpointByteOffset = dev->nDataBytesPerChunk; -+ /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) -+ * going to be way more than we need */ -+ dev->blocksInCheckpoint = 0; -+ dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2; -+ dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks); -+ for(i = 0; i < dev->checkpointMaxBlocks; i++) -+ dev->checkpointBlockList[i] = -1; -+ } -+ -+ return 1; -+} -+ -+int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum) -+{ -+ __u32 compositeSum; -+ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF); -+ *sum = compositeSum; -+ return 1; -+} -+ -+static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) -+{ -+ -+ int chunk; -+ int realignedChunk; -+ -+ yaffs_ExtendedTags tags; -+ -+ if(dev->checkpointCurrentBlock < 0){ -+ yaffs_CheckpointFindNextErasedBlock(dev); -+ dev->checkpointCurrentChunk = 0; -+ } -+ -+ if(dev->checkpointCurrentBlock < 0) -+ return 0; -+ -+ tags.chunkDeleted = 0; -+ tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ -+ tags.chunkId = dev->checkpointPageSequence + 1; -+ tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA; -+ tags.byteCount = dev->nDataBytesPerChunk; -+ if(dev->checkpointCurrentChunk == 0){ -+ /* First chunk we write for the block? Set block state to -+ checkpoint */ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock); -+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; -+ dev->blocksInCheckpoint++; -+ } -+ -+ chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; -+ -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), -+ chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId)); -+ -+ realignedChunk = chunk - dev->chunkOffset; -+ -+ dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags); -+ dev->checkpointByteOffset = 0; -+ dev->checkpointPageSequence++; -+ dev->checkpointCurrentChunk++; -+ if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){ -+ dev->checkpointCurrentChunk = 0; -+ dev->checkpointCurrentBlock = -1; -+ } -+ memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); -+ -+ return 1; -+} -+ -+ -+int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes) -+{ -+ int i=0; -+ int ok = 1; -+ -+ -+ __u8 * dataBytes = (__u8 *)data; -+ -+ -+ -+ if(!dev->checkpointBuffer) -+ return 0; -+ -+ if(!dev->checkpointOpenForWrite) -+ return -1; -+ -+ while(i < nBytes && ok) { -+ -+ -+ -+ dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ; -+ dev->checkpointSum += *dataBytes; -+ dev->checkpointXor ^= *dataBytes; -+ -+ dev->checkpointByteOffset++; -+ i++; -+ dataBytes++; -+ dev->checkpointByteCount++; -+ -+ -+ if(dev->checkpointByteOffset < 0 || -+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) -+ ok = yaffs_CheckpointFlushBuffer(dev); -+ -+ } -+ -+ return i; -+} -+ -+int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) -+{ -+ int i=0; -+ int ok = 1; -+ yaffs_ExtendedTags tags; -+ -+ -+ int chunk; -+ int realignedChunk; -+ -+ __u8 *dataBytes = (__u8 *)data; -+ -+ if(!dev->checkpointBuffer) -+ return 0; -+ -+ if(dev->checkpointOpenForWrite) -+ return -1; -+ -+ while(i < nBytes && ok) { -+ -+ -+ if(dev->checkpointByteOffset < 0 || -+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { -+ -+ if(dev->checkpointCurrentBlock < 0){ -+ yaffs_CheckpointFindNextCheckpointBlock(dev); -+ dev->checkpointCurrentChunk = 0; -+ } -+ -+ if(dev->checkpointCurrentBlock < 0) -+ ok = 0; -+ else { -+ -+ chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + -+ dev->checkpointCurrentChunk; -+ -+ realignedChunk = chunk - dev->chunkOffset; -+ -+ /* read in the next chunk */ -+ /* printf("read checkpoint page %d\n",dev->checkpointPage); */ -+ dev->readChunkWithTagsFromNAND(dev, realignedChunk, -+ dev->checkpointBuffer, -+ &tags); -+ -+ if(tags.chunkId != (dev->checkpointPageSequence + 1) || -+ tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) -+ ok = 0; -+ -+ dev->checkpointByteOffset = 0; -+ dev->checkpointPageSequence++; -+ dev->checkpointCurrentChunk++; -+ -+ if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock) -+ dev->checkpointCurrentBlock = -1; -+ } -+ } -+ -+ if(ok){ -+ *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; -+ dev->checkpointSum += *dataBytes; -+ dev->checkpointXor ^= *dataBytes; -+ dev->checkpointByteOffset++; -+ i++; -+ dataBytes++; -+ dev->checkpointByteCount++; -+ } -+ } -+ -+ return i; -+} -+ -+int yaffs_CheckpointClose(yaffs_Device *dev) -+{ -+ -+ if(dev->checkpointOpenForWrite){ -+ if(dev->checkpointByteOffset != 0) -+ yaffs_CheckpointFlushBuffer(dev); -+ } else { -+ int i; -+ for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]); -+ if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY) -+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; -+ else { -+ // Todo this looks odd... -+ } -+ } -+ YFREE(dev->checkpointBlockList); -+ dev->checkpointBlockList = NULL; -+ } -+ -+ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock; -+ dev->nErasedBlocks -= dev->blocksInCheckpoint; -+ -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR), -+ dev->checkpointByteCount)); -+ -+ if(dev->checkpointBuffer){ -+ /* free the buffer */ -+ YFREE(dev->checkpointBuffer); -+ dev->checkpointBuffer = NULL; -+ return 1; -+ } -+ else -+ return 0; -+ -+} -+ -+int yaffs_CheckpointInvalidateStream(yaffs_Device *dev) -+{ -+ /* Erase the first checksum block */ -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR))); -+ -+ if(!yaffs_CheckpointSpaceOk(dev)) -+ return 0; -+ -+ return yaffs_CheckpointErase(dev); -+} -+ -+ -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_checkptrw.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_checkptrw.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,35 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_CHECKPTRW_H__ -+#define __YAFFS_CHECKPTRW_H__ -+ -+#include "yaffs_guts.h" -+ -+int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting); -+ -+int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes); -+ -+int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes); -+ -+int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum); -+ -+int yaffs_CheckpointClose(yaffs_Device *dev); -+ -+int yaffs_CheckpointInvalidateStream(yaffs_Device *dev); -+ -+ -+#endif -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,331 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+/* -+ * 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 1.9 2007-02-14 01:09:06 wookey 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, -+}; -+ -+/* Count the bits in an unsigned char or a U32 */ -+ -+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; -+} -+ -+/* Calculate the ECC for a 256-byte block of data */ -+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 -+} -+ -+ -+/* Correct the ECC on a 256 byte block of data */ -+ -+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) -+ return 0; /* no error */ -+ -+ 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; /* Corrected the error */ -+ } -+ -+ 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; /* Corrected the error */ -+ } -+ -+ /* Unrecoverable error */ -+ -+ return -1; -+ -+} -+ -+ -+/* -+ * ECCxxxOther does ECC calcs on arbitrary n bytes of data -+ */ -+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) -+ return 0; /* no error */ -+ -+ if (lDelta == ~lDeltaPrime && -+ (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) -+ { -+ /* Single bit (recoverable) error in data */ -+ -+ bit = 0; -+ -+ if (cDelta & 0x20) -+ bit |= 0x04; -+ if (cDelta & 0x08) -+ bit |= 0x02; -+ if (cDelta & 0x02) -+ bit |= 0x01; -+ -+ if(lDelta >= nBytes) -+ return -1; -+ -+ data[lDelta] ^= (1 << bit); -+ -+ return 1; /* corrected */ -+ } -+ -+ if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + -+ yaffs_CountBits(cDelta)) == 1) { -+ /* Reccoverable error in ecc */ -+ -+ *read_ecc = *test_ecc; -+ return 1; /* corrected */ -+ } -+ -+ /* Unrecoverable error */ -+ -+ return -1; -+ -+} -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_ecc.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_ecc.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,44 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+ /* -+ * This 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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_fs.c linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_fs.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_fs.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,2278 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * Acknowledgements: -+ * Luc van OostenRyck for numerous patches. -+ * Nick Bane for numerous patches. -+ * Nick Bane for 2.5/2.6 integration. -+ * Andras Toth for mknod rdev issue. -+ * Michael Fischer for finding the problem with inode inconsistency. -+ * Some code bodily lifted from JFFS -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+/* -+ * -+ * This is the file system front-end to YAFFS that hooks it up to -+ * the VFS. -+ * -+ * Special notes: -+ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with -+ * this superblock -+ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this -+ * superblock -+ * >> inode->u.generic_ip points to the associated yaffs_Object. -+ */ -+ -+const char *yaffs_fs_c_version = -+ "$Id: yaffs_fs.c,v 1.60 2007-05-15 20:07:40 charles Exp $"; -+extern const char *yaffs_guts_c_version; -+ -+#include <linux/version.h> -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) -+#include <linux/config.h> -+#endif -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/slab.h> -+#include <linux/init.h> -+#include <linux/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> -+#include <linux/ctype.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) -+ -+/* FIXME: use sb->s_id instead ? */ -+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) -+ -+#else -+ -+#include <linux/locks.h> -+#define BDEVNAME_SIZE 0 -+#define yaffs_devname(sb, buf) kdevname(sb->s_dev) -+ -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) -+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */ -+#define __user -+#endif -+ -+#endif -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+#define WRITE_SIZE_STR "writesize" -+#define WRITE_SIZE(mtd) (mtd)->writesize -+#else -+#define WRITE_SIZE_STR "oobblock" -+#define WRITE_SIZE(mtd) (mtd)->oobblock -+#endif -+ -+#include <asm/uaccess.h> -+ -+#include "yportenv.h" -+#include "yaffs_guts.h" -+ -+#include <linux/mtd/mtd.h> -+#include "yaffs_mtdif.h" -+#include "yaffs_mtdif1.h" -+#include "yaffs_mtdif2.h" -+ -+unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS; -+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; -+ -+/* Module Parameters */ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+module_param(yaffs_traceMask,uint,0644); -+module_param(yaffs_wr_attempts,uint,0644); -+#else -+MODULE_PARM(yaffs_traceMask,"i"); -+MODULE_PARM(yaffs_wr_attempts,"i"); -+#endif -+ -+/*#define T(x) printk x */ -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)) -+#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private -+#else -+#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip -+#endif -+ -+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr))) -+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode) -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info) -+#else -+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) -+#endif -+ -+static void yaffs_put_super(struct super_block *sb); -+ -+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, -+ loff_t * pos); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_file_flush(struct file *file, fl_owner_t id); -+#else -+static int yaffs_file_flush(struct file *file); -+#endif -+ -+static int yaffs_sync_object(struct file *file, struct dentry *dentry, -+ int datasync); -+ -+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, -+ struct nameidata *n); -+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, -+ struct nameidata *n); -+#else -+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); -+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry); -+#endif -+static int yaffs_link(struct dentry *old_dentry, struct inode *dir, -+ struct dentry *dentry); -+static int yaffs_unlink(struct inode *dir, struct dentry *dentry); -+static int yaffs_symlink(struct inode *dir, struct dentry *dentry, -+ const char *symname); -+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, -+ dev_t dev); -+#else -+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, -+ int dev); -+#endif -+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, -+ struct inode *new_dir, struct dentry *new_dentry); -+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_sync_fs(struct super_block *sb, int wait); -+static void yaffs_write_super(struct super_block *sb); -+#else -+static int yaffs_sync_fs(struct super_block *sb); -+static int yaffs_write_super(struct super_block *sb); -+#endif -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf); -+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); -+#else -+static int yaffs_statfs(struct super_block *sb, struct statfs *buf); -+#endif -+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); -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)) -+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); -+#else -+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); -+#endif -+ -+static struct address_space_operations yaffs_file_address_operations = { -+ .readpage = yaffs_readpage, -+ .writepage = yaffs_writepage, -+ .prepare_write = yaffs_prepare_write, -+ .commit_write = yaffs_commit_write, -+}; -+ -+static struct file_operations yaffs_file_operations = { -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)) -+ .read = do_sync_read, -+ .write = do_sync_write, -+ .aio_read = generic_file_aio_read, -+ .aio_write = generic_file_aio_write, -+#else -+ .read = generic_file_read, -+ .write = generic_file_write, -+#endif -+ .mmap = generic_file_mmap, -+ .flush = yaffs_file_flush, -+ .fsync = yaffs_sync_object, -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+ .sendfile = generic_file_sendfile, -+#endif -+ -+}; -+ -+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, -+ .sync_fs = yaffs_sync_fs, -+ .write_super = yaffs_write_super, -+}; -+ -+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; -+} -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)) -+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -+#else -+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -+#endif -+{ -+ unsigned char *alias; -+ int ret; -+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; -+ -+ yaffs_GrossLock(dev); -+ -+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); -+ -+ yaffs_GrossUnlock(dev); -+ -+ if (!alias) -+ { -+ ret = -ENOMEM; -+ goto out; -+ } -+ -+ ret = vfs_follow_link(nd, alias); -+ kfree(alias); -+out: -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)) -+ return ERR_PTR (ret); -+#else -+ return ret; -+#endif -+} -+ -+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, -+ yaffs_Object * obj); -+ -+/* -+ * Lookup is used to find objects in the fs -+ */ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+ -+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, -+ struct nameidata *n) -+#else -+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry) -+#endif -+{ -+ yaffs_Object *obj; -+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */ -+ -+ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev; -+ -+ yaffs_GrossLock(dev); -+ -+ T(YAFFS_TRACE_OS, -+ (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 */ -+ -+ /* Can't hold gross lock when calling yaffs_get_inode() */ -+ yaffs_GrossUnlock(dev); -+ -+ 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); -+ -+ /* return dentry; */ -+ return NULL; -+#endif -+ } -+ -+ } else { -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n")); -+ -+ } -+ -+/* added NCB for 2.5/6 compatability - forces add even if inode is -+ * NULL which creates dentry hash */ -+ d_add(dentry, inode); -+ -+ return NULL; -+ /* 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 and -+ * the yaffs_Object. -+ */ -+ obj->myInode = NULL; -+ yaffs_InodeToObjectLV(inode) = NULL; -+ -+ /* If the object freeing was deferred, then the real -+ * free happens now. -+ * This should fix the inode inconsistency problem. -+ */ -+ -+ yaffs_HandleDeferedFree(obj); -+ -+ yaffs_GrossUnlock(dev); -+ } -+ -+} -+ -+/* delete is called when the link count is zero and the inode -+ * is put (ie. nobody wants to know about it anymore, time to -+ * delete the file). -+ * NB Must call clear_inode() -+ */ -+static void yaffs_delete_inode(struct inode *inode) -+{ -+ yaffs_Object *obj = yaffs_InodeToObject(inode); -+ yaffs_Device *dev; -+ -+ T(YAFFS_TRACE_OS, -+ ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino, -+ atomic_read(&inode->i_count), -+ obj ? "object exists" : "null object")); -+ -+ if (obj) { -+ dev = obj->myDev; -+ yaffs_GrossLock(dev); -+ yaffs_DeleteFile(obj); -+ yaffs_GrossUnlock(dev); -+ } -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)) -+ truncate_inode_pages (&inode->i_data, 0); -+#endif -+ clear_inode(inode); -+} -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_file_flush(struct file *file, fl_owner_t id) -+#else -+static int yaffs_file_flush(struct file *file) -+#endif -+{ -+ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry); -+ -+ yaffs_Device *dev = obj->myDev; -+ -+ T(YAFFS_TRACE_OS, -+ (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); -+ } -+ -+ 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 == nBytes ? 0 : nWritten)); -+ -+ return nWritten == nBytes ? 0 : nWritten; -+ -+} -+ -+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj) -+{ -+ if (inode && obj) { -+ -+ -+ /* Check mode against the variant type and attempt to repair if broken. */ -+ __u32 mode = obj->yst_mode; -+ switch( obj->variantType ){ -+ case YAFFS_OBJECT_TYPE_FILE : -+ if( ! S_ISREG(mode) ){ -+ obj->yst_mode &= ~S_IFMT; -+ obj->yst_mode |= S_IFREG; -+ } -+ -+ break; -+ case YAFFS_OBJECT_TYPE_SYMLINK : -+ if( ! S_ISLNK(mode) ){ -+ obj->yst_mode &= ~S_IFMT; -+ obj->yst_mode |= S_IFLNK; -+ } -+ -+ break; -+ case YAFFS_OBJECT_TYPE_DIRECTORY : -+ if( ! S_ISDIR(mode) ){ -+ obj->yst_mode &= ~S_IFMT; -+ obj->yst_mode |= S_IFDIR; -+ } -+ -+ break; -+ case YAFFS_OBJECT_TYPE_UNKNOWN : -+ case YAFFS_OBJECT_TYPE_HARDLINK : -+ case YAFFS_OBJECT_TYPE_SPECIAL : -+ default: -+ /* TODO? */ -+ break; -+ } -+ -+ inode->i_ino = obj->objectId; -+ inode->i_mode = obj->yst_mode; -+ inode->i_uid = obj->yst_uid; -+ inode->i_gid = obj->yst_gid; -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) -+ inode->i_blksize = inode->i_sb->s_blocksize; -+#endif -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+ -+ inode->i_rdev = old_decode_dev(obj->yst_rdev); -+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime); -+ inode->i_atime.tv_nsec = 0; -+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; -+ inode->i_mtime.tv_nsec = 0; -+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; -+ inode->i_ctime.tv_nsec = 0; -+#else -+ inode->i_rdev = obj->yst_rdev; -+ inode->i_atime = obj->yst_atime; -+ inode->i_mtime = obj->yst_mtime; -+ inode->i_ctime = obj->yst_ctime; -+#endif -+ inode->i_size = yaffs_GetObjectFileLength(obj); -+ inode->i_blocks = (inode->i_size + 511) >> 9; -+ -+ inode->i_nlink = yaffs_GetObjectLinkCount(obj); -+ -+ T(YAFFS_TRACE_OS, -+ (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; -+ } -+ -+ yaffs_InodeToObjectLV(inode) = 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 */ -+ /* NB You can't be holding grossLock or deadlock will happen! */ -+ -+ return inode; -+} -+ -+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, -+ loff_t * pos) -+{ -+ yaffs_Object *obj; -+ int nWritten, ipos; -+ struct inode *inode; -+ yaffs_Device *dev; -+ -+ obj = yaffs_DentryToObject(f->f_dentry); -+ -+ dev = obj->myDev; -+ -+ yaffs_GrossLock(dev); -+ -+ inode = f->f_dentry->d_inode; -+ -+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) { -+ ipos = inode->i_size; -+ } else { -+ ipos = *pos; -+ } -+ -+ if (!obj) { -+ T(YAFFS_TRACE_OS, -+ (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 == 0 ? -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; -+ -+ /* If the directory has changed since the open or last call to -+ readdir, rewind to after the 2 canned entries. */ -+ -+ if (f->f_version != inode->i_version) { -+ offset = 2; -+ f->f_pos = offset; -+ f->f_version = inode->i_version; -+ } -+ -+ 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((dir->i_mode & S_ISGID) && S_ISDIR(mode)) -+ mode |= S_ISGID; -+ -+ 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; -+ } -+ -+ /* Can not call yaffs_get_inode() with gross lock held */ -+ yaffs_GrossUnlock(dev); -+ -+ if (obj) { -+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); -+ d_instantiate(dentry, inode); -+ T(YAFFS_TRACE_OS, -+ (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; -+ } -+ -+ 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); -+ -+ if (retVal == YAFFS_OK) { -+ dentry->d_inode->i_nlink--; -+ dir->i_version++; -+ yaffs_GrossUnlock(dev); -+ mark_inode_dirty(dentry->d_inode); -+ return 0; -+ } -+ yaffs_GrossUnlock(dev); -+ return -ENOTEMPTY; -+} -+ -+/* -+ * Create a link... -+ */ -+static int yaffs_link(struct dentry *old_dentry, struct inode *dir, -+ struct dentry *dentry) -+{ -+ struct inode *inode = old_dentry->d_inode; -+ yaffs_Object *obj = NULL; -+ yaffs_Object *link = NULL; -+ yaffs_Device *dev; -+ -+ T(YAFFS_TRACE_OS, (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; -+ yaffs_Object *target; -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n")); -+ dev = yaffs_InodeToObject(old_dir)->myDev; -+ -+ yaffs_GrossLock(dev); -+ -+ /* Check if the target is an existing directory that is not empty. */ -+ target = -+ yaffs_FindObjectByName(yaffs_InodeToObject(new_dir), -+ new_dentry->d_name.name); -+ -+ -+ -+ if (target && -+ target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && -+ !list_empty(&target->variant.directoryVariant.children)) { -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n")); -+ -+ retVal = YAFFS_FAIL; -+ } else { -+ -+ /* Now does unlinking internally using shadowing mechanism */ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n")); -+ -+ retVal = -+ yaffs_RenameObject(yaffs_InodeToObject(old_dir), -+ old_dentry->d_name.name, -+ yaffs_InodeToObject(new_dir), -+ new_dentry->d_name.name); -+ -+ } -+ yaffs_GrossUnlock(dev); -+ -+ if (retVal == YAFFS_OK) { -+ if(target) { -+ new_dentry->d_inode->i_nlink--; -+ mark_inode_dirty(new_dentry->d_inode); -+ } -+ -+ return 0; -+ } else { -+ return -ENOTEMPTY; -+ } -+ -+} -+ -+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) -+{ -+ struct inode *inode = dentry->d_inode; -+ int error; -+ yaffs_Device *dev; -+ -+ T(YAFFS_TRACE_OS, -+ (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(2,6,17)) -+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) -+{ -+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; -+ struct super_block *sb = dentry->d_sb; -+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) -+{ -+ yaffs_Device *dev = yaffs_SuperToDevice(sb); -+#else -+static int yaffs_statfs(struct super_block *sb, struct statfs *buf) -+{ -+ yaffs_Device *dev = yaffs_SuperToDevice(sb); -+#endif -+ -+ T(YAFFS_TRACE_OS, (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->nDataBytesPerChunk) { -+ -+ buf->f_blocks = -+ (dev->endBlock - dev->startBlock + -+ 1) * dev->nChunksPerBlock / (sb->s_blocksize / -+ dev->nDataBytesPerChunk); -+ buf->f_bfree = -+ yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize / -+ dev->nDataBytesPerChunk); -+ } else { -+ -+ buf->f_blocks = -+ (dev->endBlock - dev->startBlock + -+ 1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk / -+ sb->s_blocksize); -+ buf->f_bfree = -+ yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk / -+ sb->s_blocksize); -+ } -+ buf->f_files = 0; -+ buf->f_ffree = 0; -+ buf->f_bavail = buf->f_bfree; -+ -+ yaffs_GrossUnlock(dev); -+ return 0; -+} -+ -+ -+/** -+static int yaffs_do_sync_fs(struct super_block *sb) -+{ -+ -+ yaffs_Device *dev = yaffs_SuperToDevice(sb); -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n")); -+ -+ if(sb->s_dirt) { -+ yaffs_GrossLock(dev); -+ -+ if(dev) -+ yaffs_CheckpointSave(dev); -+ -+ yaffs_GrossUnlock(dev); -+ -+ sb->s_dirt = 0; -+ } -+ return 0; -+} -+**/ -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static void yaffs_write_super(struct super_block *sb) -+#else -+static int yaffs_write_super(struct super_block *sb) -+#endif -+{ -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n")); -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) -+ return 0; /* yaffs_do_sync_fs(sb);*/ -+#endif -+} -+ -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_sync_fs(struct super_block *sb, int wait) -+#else -+static int yaffs_sync_fs(struct super_block *sb) -+#endif -+{ -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n")); -+ -+ return 0; /* yaffs_do_sync_fs(sb);*/ -+ -+} -+ -+ -+static void yaffs_read_inode(struct inode *inode) -+{ -+ /* NB This is called as a side effect of other functions, but -+ * we had to release the lock to prevent deadlocks, so -+ * need to lock again. -+ */ -+ -+ yaffs_Object *obj; -+ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb); -+ -+ T(YAFFS_TRACE_OS, -+ (KERN_DEBUG "yaffs_read_inode for %d\n", (int)inode->i_ino)); -+ -+ yaffs_GrossLock(dev); -+ -+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino); -+ -+ yaffs_FillInodeFromObject(inode, obj); -+ -+ yaffs_GrossUnlock(dev); -+} -+ -+static LIST_HEAD(yaffs_dev_list); -+ -+static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data) -+{ -+ yaffs_Device *dev = yaffs_SuperToDevice(sb); -+ -+ if( *flags & MS_RDONLY ) { -+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; -+ -+ T(YAFFS_TRACE_OS, -+ (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name )); -+ -+ yaffs_GrossLock(dev); -+ -+ yaffs_FlushEntireDeviceCache(dev); -+ -+ yaffs_CheckpointSave(dev); -+ -+ if (mtd->sync) -+ mtd->sync(mtd); -+ -+ yaffs_GrossUnlock(dev); -+ } -+ else { -+ T(YAFFS_TRACE_OS, -+ (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name )); -+ } -+ -+ return 0; -+} -+ -+static void yaffs_put_super(struct super_block *sb) -+{ -+ yaffs_Device *dev = yaffs_SuperToDevice(sb); -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n")); -+ -+ yaffs_GrossLock(dev); -+ -+ yaffs_FlushEntireDeviceCache(dev); -+ -+ yaffs_CheckpointSave(dev); -+ -+ if (dev->putSuperFunc) { -+ dev->putSuperFunc(sb); -+ } -+ -+ yaffs_Deinitialise(dev); -+ -+ yaffs_GrossUnlock(dev); -+ -+ /* we assume this is protected by lock_kernel() in mount/umount */ -+ list_del(&dev->devList); -+ -+ if(dev->spareBuffer){ -+ YFREE(dev->spareBuffer); -+ dev->spareBuffer = NULL; -+ } -+ -+ kfree(dev); -+} -+ -+ -+static void yaffs_MTDPutSuper(struct super_block *sb) -+{ -+ -+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; -+ -+ if (mtd->sync) { -+ mtd->sync(mtd); -+ } -+ -+ put_mtd_device(mtd); -+} -+ -+ -+static void yaffs_MarkSuperBlockDirty(void *vsb) -+{ -+ struct super_block *sb = (struct super_block *)vsb; -+ -+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb)); -+// if(sb) -+// sb->s_dirt = 1; -+} -+ -+typedef struct { -+ int inband_tags; -+ int skip_checkpoint_read; -+ int skip_checkpoint_write; -+ int no_cache; -+} yaffs_options; -+ -+#define MAX_OPT_LEN 20 -+static int yaffs_parse_options(yaffs_options *options, const char *options_str) -+{ -+ char cur_opt[MAX_OPT_LEN+1]; -+ int p; -+ int error = 0; -+ -+ /* Parse through the options which is a comma seperated list */ -+ -+ while(options_str && *options_str && !error){ -+ memset(cur_opt,0,MAX_OPT_LEN+1); -+ p = 0; -+ -+ while(*options_str && *options_str != ','){ -+ if(p < MAX_OPT_LEN){ -+ cur_opt[p] = *options_str; -+ p++; -+ } -+ options_str++; -+ } -+ -+ if(!strcmp(cur_opt,"inband-tags")) -+ options->inband_tags = 1; -+ else if(!strcmp(cur_opt,"no-cache")) -+ options->no_cache = 1; -+ else if(!strcmp(cur_opt,"no-checkpoint-read")) -+ options->skip_checkpoint_read = 1; -+ else if(!strcmp(cur_opt,"no-checkpoint-write")) -+ options->skip_checkpoint_write = 1; -+ else if(!strcmp(cur_opt,"no-checkpoint")){ -+ options->skip_checkpoint_read = 1; -+ options->skip_checkpoint_write = 1; -+ } else { -+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt); -+ error = 1; -+ } -+ -+ } -+ -+ return error; -+} -+ -+static struct super_block *yaffs_internal_read_super(int yaffsVersion, -+ struct super_block *sb, -+ void *data, int silent) -+{ -+ int nBlocks; -+ struct inode *inode = NULL; -+ struct dentry *root; -+ yaffs_Device *dev = 0; -+ char devname_buf[BDEVNAME_SIZE + 1]; -+ struct mtd_info *mtd; -+ int err; -+ char *data_str = (char *)data; -+ -+ yaffs_options options; -+ -+ sb->s_magic = YAFFS_MAGIC; -+ sb->s_op = &yaffs_super_ops; -+ -+ if (!sb) -+ printk(KERN_INFO "yaffs: sb is NULL\n"); -+ else if (!sb->s_dev) -+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); -+ else if (!yaffs_devname(sb, devname_buf)) -+ printk(KERN_INFO "yaffs: devname is NULL\n"); -+ else -+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n", -+ sb->s_dev, -+ yaffs_devname(sb, devname_buf)); -+ -+ if(!data_str) -+ data_str = ""; -+ -+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str); -+ -+ memset(&options,0,sizeof(options)); -+ -+ if(yaffs_parse_options(&options,data_str)){ -+ /* Option parsing failed */ -+ return NULL; -+ } -+ -+ -+ sb->s_blocksize = PAGE_CACHE_SIZE; -+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT; -+ T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion)); -+ T(YAFFS_TRACE_OS, -+ ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize))); -+ -+#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY -+ T(YAFFS_TRACE_OS, -+ ("yaffs: Write verification disabled. All guarantees " -+ "null and void\n")); -+#endif -+ -+ T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, " -+ "\"%s\"\n", -+ MAJOR(sb->s_dev), MINOR(sb->s_dev), -+ yaffs_devname(sb, devname_buf))); -+ -+ /* Check it's an mtd device..... */ -+ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) { -+ return NULL; /* This isn't an mtd device */ -+ } -+ /* Get the device */ -+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); -+ if (!mtd) { -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device #%u doesn't appear to exist\n", -+ MINOR(sb->s_dev))); -+ return NULL; -+ } -+ /* Check it's NAND */ -+ if (mtd->type != MTD_NANDFLASH) { -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device is not NAND it's type %d\n", mtd->type)); -+ return NULL; -+ } -+ -+ T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase)); -+ T(YAFFS_TRACE_OS, (" read %p\n", mtd->read)); -+ T(YAFFS_TRACE_OS, (" write %p\n", mtd->write)); -+ T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob)); -+ T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob)); -+ T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad)); -+ T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad)); -+ T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd))); -+ T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize)); -+ T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize)); -+ T(YAFFS_TRACE_OS, (" size %d\n", mtd->size)); -+ -+#ifdef CONFIG_YAFFS_AUTO_YAFFS2 -+ -+ if (yaffsVersion == 1 && -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ mtd->writesize >= 2048) { -+#else -+ mtd->oobblock >= 2048) { -+#endif -+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n")); -+ yaffsVersion = 2; -+ } -+ -+ /* Added NCB 26/5/2006 for completeness */ -+ if (yaffsVersion == 2 && -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ mtd->writesize == 512) { -+#else -+ mtd->oobblock == 512) { -+#endif -+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n")); -+ yaffsVersion = 1; -+ } -+ -+#endif -+ -+ if (yaffsVersion == 2) { -+ /* Check for version 2 style functions */ -+ if (!mtd->erase || -+ !mtd->block_isbad || -+ !mtd->block_markbad || -+ !mtd->read || -+ !mtd->write || -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ !mtd->read_oob || !mtd->write_oob) { -+#else -+ !mtd->write_ecc || -+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { -+#endif -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device does not support required " -+ "functions\n"));; -+ return NULL; -+ } -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE || -+#else -+ if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE || -+#endif -+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) { -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device does not have the " -+ "right page sizes\n")); -+ return NULL; -+ } -+ } else { -+ /* Check for V1 style functions */ -+ if (!mtd->erase || -+ !mtd->read || -+ !mtd->write || -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ !mtd->read_oob || !mtd->write_oob) { -+#else -+ !mtd->write_ecc || -+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { -+#endif -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device does not support required " -+ "functions\n"));; -+ return NULL; -+ } -+ -+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || -+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) { -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs: MTD device does not support have the " -+ "right page sizes\n")); -+ return NULL; -+ } -+ } -+ -+ /* OK, so if we got here, we have an MTD that's NAND and looks -+ * like it has the right capabilities -+ * Set the yaffs_Device up for mtd -+ */ -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+ sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL); -+#else -+ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL); -+#endif -+ if (!dev) { -+ /* Deep shit could not allocate device structure */ -+ T(YAFFS_TRACE_ALWAYS, -+ ("yaffs_read_super: Failed trying to allocate " -+ "yaffs_Device. \n")); -+ return NULL; -+ } -+ -+ memset(dev, 0, sizeof(yaffs_Device)); -+ dev->genericDevice = mtd; -+ dev->name = mtd->name; -+ -+ /* Set up the memory size parameters.... */ -+ -+ nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); -+ dev->startBlock = 0; -+ dev->endBlock = nBlocks - 1; -+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; -+ dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK; -+ dev->nReservedBlocks = 5; -+ dev->nShortOpCaches = (options.no_cache) ? 0 : 10; -+ -+ /* ... and the functions. */ -+ if (yaffsVersion == 2) { -+ dev->writeChunkWithTagsToNAND = -+ nandmtd2_WriteChunkWithTagsToNAND; -+ dev->readChunkWithTagsFromNAND = -+ nandmtd2_ReadChunkWithTagsFromNAND; -+ dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; -+ dev->queryNANDBlock = nandmtd2_QueryNANDBlock; -+ dev->spareBuffer = YMALLOC(mtd->oobsize); -+ dev->isYaffs2 = 1; -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ dev->nDataBytesPerChunk = mtd->writesize; -+ dev->nChunksPerBlock = mtd->erasesize / mtd->writesize; -+#else -+ dev->nDataBytesPerChunk = mtd->oobblock; -+ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; -+#endif -+ nBlocks = mtd->size / mtd->erasesize; -+ -+ dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS; -+ dev->startBlock = 0; -+ dev->endBlock = nBlocks - 1; -+ } else { -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ /* use the MTD interface in yaffs_mtdif1.c */ -+ dev->writeChunkWithTagsToNAND = -+ nandmtd1_WriteChunkWithTagsToNAND; -+ dev->readChunkWithTagsFromNAND = -+ nandmtd1_ReadChunkWithTagsFromNAND; -+ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad; -+ dev->queryNANDBlock = nandmtd1_QueryNANDBlock; -+#else -+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND; -+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; -+#endif -+ dev->isYaffs2 = 0; -+ } -+ /* ... and common functions */ -+ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; -+ dev->initialiseNAND = nandmtd_InitialiseNAND; -+ -+ dev->putSuperFunc = yaffs_MTDPutSuper; -+ -+ dev->superBlock = (void *)sb; -+ dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty; -+ -+ -+#ifndef CONFIG_YAFFS_DOES_ECC -+ dev->useNANDECC = 1; -+#endif -+ -+#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES -+ dev->wideTnodesDisabled = 1; -+#endif -+ -+ dev->skipCheckpointRead = options.skip_checkpoint_read; -+ dev->skipCheckpointWrite = options.skip_checkpoint_write; -+ -+ /* we assume this is protected by lock_kernel() in mount/umount */ -+ 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")); -+ -+ /* Release lock before yaffs_get_inode() */ -+ yaffs_GrossUnlock(dev); -+ -+ /* Create root inode */ -+ if (err == YAFFS_OK) -+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, -+ yaffs_Root(dev)); -+ -+ if (!inode) -+ return NULL; -+ -+ inode->i_op = &yaffs_dir_inode_operations; -+ inode->i_fop = &yaffs_dir_operations; -+ -+ T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n")); -+ -+ root = d_alloc_root(inode); -+ -+ T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n")); -+ -+ if (!root) { -+ iput(inode); -+ return NULL; -+ } -+ sb->s_root = root; -+ -+ T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n")); -+ return sb; -+} -+ -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, -+ int silent) -+{ -+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; -+} -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs_read_super(struct file_system_type *fs, -+ int flags, const char *dev_name, -+ void *data, struct vfsmount *mnt) -+{ -+ -+ return get_sb_bdev(fs, flags, dev_name, data, -+ yaffs_internal_read_super_mtd, mnt); -+} -+#else -+static struct super_block *yaffs_read_super(struct file_system_type *fs, -+ int flags, const char *dev_name, -+ void *data) -+{ -+ -+ return get_sb_bdev(fs, flags, dev_name, data, -+ yaffs_internal_read_super_mtd); -+} -+#endif -+ -+static struct file_system_type yaffs_fs_type = { -+ .owner = THIS_MODULE, -+ .name = "yaffs", -+ .get_sb = yaffs_read_super, -+ .kill_sb = kill_block_super, -+ .fs_flags = FS_REQUIRES_DEV, -+}; -+#else -+static struct super_block *yaffs_read_super(struct super_block *sb, void *data, -+ int silent) -+{ -+ return yaffs_internal_read_super(1, sb, data, silent); -+} -+ -+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, -+ FS_REQUIRES_DEV); -+#endif -+ -+ -+#ifdef CONFIG_YAFFS_YAFFS2 -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, -+ int silent) -+{ -+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; -+} -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static int yaffs2_read_super(struct file_system_type *fs, -+ int flags, const char *dev_name, void *data, -+ struct vfsmount *mnt) -+{ -+ return get_sb_bdev(fs, flags, dev_name, data, -+ yaffs2_internal_read_super_mtd, mnt); -+} -+#else -+static struct super_block *yaffs2_read_super(struct file_system_type *fs, -+ int flags, const char *dev_name, -+ void *data) -+{ -+ -+ return get_sb_bdev(fs, flags, dev_name, data, -+ yaffs2_internal_read_super_mtd); -+} -+#endif -+ -+static struct file_system_type yaffs2_fs_type = { -+ .owner = THIS_MODULE, -+ .name = "yaffs2", -+ .get_sb = yaffs2_read_super, -+ .kill_sb = kill_block_super, -+ .fs_flags = FS_REQUIRES_DEV, -+}; -+#else -+static struct super_block *yaffs2_read_super(struct super_block *sb, -+ void *data, int silent) -+{ -+ return yaffs_internal_read_super(2, sb, data, silent); -+} -+ -+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, -+ FS_REQUIRES_DEV); -+#endif -+ -+#endif /* CONFIG_YAFFS_YAFFS2 */ -+ -+static struct proc_dir_entry *my_proc_entry; -+ -+static char *yaffs_dump_dev(char *buf, yaffs_Device * dev) -+{ -+ buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock); -+ buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock); -+ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk); -+ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits); -+ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize); -+ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks); -+ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks); -+ buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks); -+ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint); -+ buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated); -+ buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes); -+ buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated); -+ buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects); -+ buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks); -+ buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites); -+ buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads); -+ buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures); -+ buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies); -+ buf += -+ sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections); -+ buf += -+ sprintf(buf, "passiveGCs......... %d\n", -+ dev->passiveGarbageCollections); -+ buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites); -+ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches); -+ buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks); -+ buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed); -+ buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed); -+ buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed); -+ buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed); -+ buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits); -+ buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles); -+ buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles); -+ buf += -+ sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions); -+ buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC); -+ buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2); -+ -+ 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; -+} -+ -+/** -+ * Set the verbosity of the warnings and error messages. -+ * -+ * Note that the names can only be a..z or _ with the current code. -+ */ -+ -+static struct { -+ char *mask_name; -+ unsigned mask_bitfield; -+} mask_flags[] = { -+ {"allocate", YAFFS_TRACE_ALLOCATE}, -+ {"always", YAFFS_TRACE_ALWAYS}, -+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, -+ {"buffers", YAFFS_TRACE_BUFFERS}, -+ {"bug", YAFFS_TRACE_BUG}, -+ {"checkpt", YAFFS_TRACE_CHECKPOINT}, -+ {"deletion", YAFFS_TRACE_DELETION}, -+ {"erase", YAFFS_TRACE_ERASE}, -+ {"error", YAFFS_TRACE_ERROR}, -+ {"gc_detail", YAFFS_TRACE_GC_DETAIL}, -+ {"gc", YAFFS_TRACE_GC}, -+ {"mtd", YAFFS_TRACE_MTD}, -+ {"nandaccess", YAFFS_TRACE_NANDACCESS}, -+ {"os", YAFFS_TRACE_OS}, -+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, -+ {"scan", YAFFS_TRACE_SCAN}, -+ {"tracing", YAFFS_TRACE_TRACING}, -+ -+ {"verify", YAFFS_TRACE_VERIFY}, -+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, -+ {"verify_full", YAFFS_TRACE_VERIFY_FULL}, -+ {"verify_all", YAFFS_TRACE_VERIFY_ALL}, -+ -+ {"write", YAFFS_TRACE_WRITE}, -+ {"all", 0xffffffff}, -+ {"none", 0}, -+ {NULL, 0}, -+}; -+ -+#define MAX_MASK_NAME_LENGTH 40 -+static int yaffs_proc_write(struct file *file, const char *buf, -+ unsigned long count, void *data) -+{ -+ unsigned rg = 0, mask_bitfield; -+ char *end; -+ char *mask_name; -+ char *x; -+ char substring[MAX_MASK_NAME_LENGTH+1]; -+ int i; -+ int done = 0; -+ int add, len = 0; -+ int pos = 0; -+ -+ rg = yaffs_traceMask; -+ -+ while (!done && (pos < count)) { -+ done = 1; -+ while ((pos < count) && isspace(buf[pos])) { -+ pos++; -+ } -+ -+ switch (buf[pos]) { -+ case '+': -+ case '-': -+ case '=': -+ add = buf[pos]; -+ pos++; -+ break; -+ -+ default: -+ add = ' '; -+ break; -+ } -+ mask_name = NULL; -+ -+ mask_bitfield = simple_strtoul(buf + pos, &end, 0); -+ if (end > buf + pos) { -+ mask_name = "numeral"; -+ len = end - (buf + pos); -+ done = 0; -+ } else { -+ for(x = buf + pos, i = 0; -+ (*x == '_' || (*x >='a' && *x <= 'z')) && -+ i <MAX_MASK_NAME_LENGTH; x++, i++, pos++) -+ substring[i] = *x; -+ substring[i] = '\0'; -+ -+ for (i = 0; mask_flags[i].mask_name != NULL; i++) { -+ //len = strlen(mask_flags[i].mask_name); -+ //if (strncmp(buf + pos, mask_flags[i].mask_name, len) == 0) { -+ if(strcmp(substring,mask_flags[i].mask_name) == 0){ -+ mask_name = mask_flags[i].mask_name; -+ mask_bitfield = mask_flags[i].mask_bitfield; -+ done = 0; -+ break; -+ } -+ } -+ } -+ -+ if (mask_name != NULL) { -+ // pos += len; -+ done = 0; -+ switch(add) { -+ case '-': -+ rg &= ~mask_bitfield; -+ break; -+ case '+': -+ rg |= mask_bitfield; -+ break; -+ case '=': -+ rg = mask_bitfield; -+ break; -+ default: -+ rg |= mask_bitfield; -+ break; -+ } -+ } -+ } -+ -+ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS; -+ -+ printk("new trace = 0x%08X\n",yaffs_traceMask); -+ -+ if (rg & YAFFS_TRACE_ALWAYS) { -+ for (i = 0; mask_flags[i].mask_name != NULL; i++) { -+ char flag; -+ flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-'; -+ printk("%c%s\n", flag, mask_flags[i].mask_name); -+ } -+ } -+ -+ return count; -+} -+ -+/* Stuff to handle installation of file systems */ -+struct file_system_to_install { -+ struct file_system_type *fst; -+ int installed; -+}; -+ -+static struct file_system_to_install fs_to_install[] = { -+//#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_entry("yaffs", -+ S_IRUGO | S_IFREG, -+ &proc_root); -+ -+ if (my_proc_entry) { -+ my_proc_entry->write_proc = yaffs_proc_write; -+ my_proc_entry->read_proc = yaffs_proc_read; -+ my_proc_entry->data = NULL; -+ } else { -+ return -ENOMEM; -+ } -+ -+ /* Now add the file system entries */ -+ -+ fsinst = fs_to_install; -+ -+ while (fsinst->fst && !error) { -+ error = register_filesystem(fsinst->fst); -+ if (!error) { -+ fsinst->installed = 1; -+ } -+ fsinst++; -+ } -+ -+ /* Any errors? uninstall */ -+ if (error) { -+ fsinst = fs_to_install; -+ -+ while (fsinst->fst) { -+ if (fsinst->installed) { -+ unregister_filesystem(fsinst->fst); -+ fsinst->installed = 0; -+ } -+ fsinst++; -+ } -+ } -+ -+ return error; -+} -+ -+static void __exit exit_yaffs_fs(void) -+{ -+ -+ struct file_system_to_install *fsinst; -+ -+ T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__ -+ " removing. \n")); -+ -+ remove_proc_entry("yaffs", &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., 2002-2006"); -+MODULE_LICENSE("GPL"); -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.c linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_guts.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,7469 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+const char *yaffs_guts_c_version = -+ "$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $"; -+ -+#include "yportenv.h" -+ -+#include "yaffsinterface.h" -+#include "yaffs_guts.h" -+#include "yaffs_tagsvalidity.h" -+ -+#include "yaffs_tagscompat.h" -+#ifndef CONFIG_YAFFS_USE_OWN_SORT -+#include "yaffs_qsort.h" -+#endif -+#include "yaffs_nand.h" -+ -+#include "yaffs_checkptrw.h" -+ -+#include "yaffs_nand.h" -+#include "yaffs_packedtags2.h" -+ -+ -+#ifdef CONFIG_YAFFS_WINCE -+void yfsd_LockYAFFS(BOOL fsLockOnly); -+void yfsd_UnlockYAFFS(BOOL fsLockOnly); -+#endif -+ -+#define YAFFS_PASSIVE_GC_CHUNKS 2 -+ -+#include "yaffs_ecc.h" -+ -+ -+/* Robustification (if it ever comes about...) */ -+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND); -+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk); -+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); -+ -+/* Other local prototypes */ -+static int yaffs_UnlinkObject( yaffs_Object *obj); -+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); -+ -+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); -+ -+static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev, -+ const __u8 * buffer, -+ yaffs_ExtendedTags * tags, -+ int useReserve); -+static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, -+ int chunkInNAND, int inScan); -+ -+static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, -+ yaffs_ObjectType type); -+static void yaffs_AddObjectToDirectory(yaffs_Object * directory, -+ yaffs_Object * obj); -+static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, -+ int force, int isShrink, int shadows); -+static 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); -+ -+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, -+ int chunkInNAND); -+ -+static int yaffs_UnlinkWorker(yaffs_Object * obj); -+static void yaffs_DestroyObject(yaffs_Object * obj); -+ -+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, yaffs_BlockInfo **blockUsedPtr); -+ -+static void yaffs_VerifyFreeChunks(yaffs_Device * dev); -+ -+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); -+ -+#ifdef YAFFS_PARANOID -+static int yaffs_CheckFileSanity(yaffs_Object * in); -+#else -+#define yaffs_CheckFileSanity(in) -+#endif -+ -+static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in); -+static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId); -+ -+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); -+ -+static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, -+ yaffs_ExtendedTags * tags); -+ -+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos); -+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, -+ yaffs_FileStructure * fStruct, -+ __u32 chunkId); -+ -+ -+/* Function to calculate chunk and offset */ -+ -+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset) -+{ -+ if(dev->chunkShift){ -+ /* Easy-peasy power of 2 case */ -+ *chunk = (__u32)(addr >> dev->chunkShift); -+ *offset = (__u32)(addr & dev->chunkMask); -+ } -+ else if(dev->crumbsPerChunk) -+ { -+ /* Case where we're using "crumbs" */ -+ *offset = (__u32)(addr & dev->crumbMask); -+ addr >>= dev->crumbShift; -+ *chunk = ((__u32)addr)/dev->crumbsPerChunk; -+ *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift); -+ } -+ else -+ YBUG(); -+} -+ -+/* Function to return the number of shifts for a power of 2 greater than or equal -+ * to the given number -+ * Note we don't try to cater for all possible numbers and this does not have to -+ * be hellishly efficient. -+ */ -+ -+static __u32 ShiftsGE(__u32 x) -+{ -+ int extraBits; -+ int nShifts; -+ -+ nShifts = extraBits = 0; -+ -+ while(x>1){ -+ if(x & 1) extraBits++; -+ x>>=1; -+ nShifts++; -+ } -+ -+ if(extraBits) -+ nShifts++; -+ -+ return nShifts; -+} -+ -+/* Function to return the number of shifts to get a 1 in bit 0 -+ */ -+ -+static __u32 ShiftDiv(__u32 x) -+{ -+ int nShifts; -+ -+ nShifts = 0; -+ -+ if(!x) return 0; -+ -+ while( !(x&1)){ -+ x>>=1; -+ nShifts++; -+ } -+ -+ return nShifts; -+} -+ -+ -+ -+/* -+ * Temporary buffer manipulations. -+ */ -+ -+static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) -+{ -+ int i; -+ __u8 *buf = (__u8 *)1; -+ -+ memset(dev->tempBuffer,0,sizeof(dev->tempBuffer)); -+ -+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { -+ dev->tempBuffer[i].line = 0; /* not in use */ -+ dev->tempBuffer[i].buffer = buf = -+ YMALLOC_DMA(dev->nDataBytesPerChunk); -+ } -+ -+ return buf ? YAFFS_OK : YAFFS_FAIL; -+ -+} -+ -+static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) -+{ -+ int i, j; -+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { -+ if (dev->tempBuffer[i].line == 0) { -+ dev->tempBuffer[i].line = lineNo; -+ 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))); -+ -+ /* -+ * If we got here then we have to allocate an unmanaged one -+ * This is not good. -+ */ -+ -+ dev->unmanagedTempAllocations++; -+ return YMALLOC(dev->nDataBytesPerChunk); -+ -+} -+ -+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++; -+ } -+ -+} -+ -+/* -+ * Determine if we have a managed buffer. -+ */ -+int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer) -+{ -+ int i; -+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { -+ if (dev->tempBuffer[i].buffer == buffer) -+ return 1; -+ -+ } -+ -+ for (i = 0; i < dev->nShortOpCaches; i++) { -+ if( dev->srCache[i].data == buffer ) -+ return 1; -+ -+ } -+ -+ if (buffer == dev->checkpointBuffer) -+ return 1; -+ -+ T(YAFFS_TRACE_ALWAYS, -+ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); -+ return 0; -+} -+ -+ -+ -+/* -+ * 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_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) -+{ -+ if(blk < dev->internalStartBlock || blk > dev->internalEndBlock || -+ chunk < 0 || chunk >= dev->nChunksPerBlock) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk)); -+ YBUG(); -+ } -+} -+ -+static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk) -+{ -+ __u8 *blkBits = yaffs_BlockBits(dev, blk); -+ -+ memset(blkBits, 0, dev->chunkBitmapStride); -+} -+ -+static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk) -+{ -+ __u8 *blkBits = yaffs_BlockBits(dev, blk); -+ -+ yaffs_VerifyChunkBitId(dev,blk,chunk); -+ -+ blkBits[chunk / 8] &= ~(1 << (chunk & 7)); -+} -+ -+static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) -+{ -+ __u8 *blkBits = yaffs_BlockBits(dev, blk); -+ -+ yaffs_VerifyChunkBitId(dev,blk,chunk); -+ -+ blkBits[chunk / 8] |= (1 << (chunk & 7)); -+} -+ -+static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk) -+{ -+ __u8 *blkBits = yaffs_BlockBits(dev, blk); -+ yaffs_VerifyChunkBitId(dev,blk,chunk); -+ -+ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -+} -+ -+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 int yaffs_CountChunkBits(yaffs_Device * dev, int blk) -+{ -+ __u8 *blkBits = yaffs_BlockBits(dev, blk); -+ int i; -+ int n = 0; -+ for (i = 0; i < dev->chunkBitmapStride; i++) { -+ __u8 x = *blkBits; -+ while(x){ -+ if(x & 1) -+ n++; -+ x >>=1; -+ } -+ -+ blkBits++; -+ } -+ return n; -+} -+ -+/* -+ * Verification code -+ */ -+ -+static int yaffs_SkipVerification(yaffs_Device *dev) -+{ -+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -+} -+ -+static int yaffs_SkipFullVerification(yaffs_Device *dev) -+{ -+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); -+} -+ -+static int yaffs_SkipNANDVerification(yaffs_Device *dev) -+{ -+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); -+} -+ -+static const char * blockStateName[] = { -+"Unknown", -+"Needs scanning", -+"Scanning", -+"Empty", -+"Allocating", -+"Full", -+"Dirty", -+"Checkpoint", -+"Collecting", -+"Dead" -+}; -+ -+static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) -+{ -+ int actuallyUsed; -+ int inUse; -+ -+ if(yaffs_SkipVerification(dev)) -+ return; -+ -+ /* Report illegal runtime states */ -+ if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState)); -+ -+ switch(bi->blockState){ -+ case YAFFS_BLOCK_STATE_UNKNOWN: -+ case YAFFS_BLOCK_STATE_SCANNING: -+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING: -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR), -+ n,blockStateName[bi->blockState])); -+ } -+ -+ /* Check pages in use and soft deletions are legal */ -+ -+ actuallyUsed = bi->pagesInUse - bi->softDeletions; -+ -+ if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || -+ bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || -+ actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), -+ n,bi->pagesInUse,bi->softDeletions)); -+ -+ -+ /* Check chunk bitmap legal */ -+ inUse = yaffs_CountChunkBits(dev,n); -+ if(inUse != bi->pagesInUse) -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), -+ n,bi->pagesInUse,inUse)); -+ -+ /* Check that the sequence number is valid. -+ * Ten million is legal, but is very unlikely -+ */ -+ if(dev->isYaffs2 && -+ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && -+ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 )) -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR), -+ n,bi->sequenceNumber)); -+ -+} -+ -+static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) -+{ -+ yaffs_VerifyBlock(dev,bi,n); -+ -+ /* After collection the block should be in the erased state */ -+ /* TODO: This will need to change if we do partial gc */ -+ -+ if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){ -+ T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), -+ n,bi->blockState)); -+ } -+} -+ -+static void yaffs_VerifyBlocks(yaffs_Device *dev) -+{ -+ int i; -+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; -+ int nIllegalBlockStates = 0; -+ -+ -+ if(yaffs_SkipVerification(dev)) -+ return; -+ -+ memset(nBlocksPerState,0,sizeof(nBlocksPerState)); -+ -+ -+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); -+ yaffs_VerifyBlock(dev,bi,i); -+ -+ if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) -+ nBlocksPerState[bi->blockState]++; -+ else -+ nIllegalBlockStates++; -+ -+ } -+ -+ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); -+ T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR))); -+ -+ T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates)); -+ if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) -+ T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR))); -+ -+ for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("%s %d blocks"TENDSTR), -+ blockStateName[i],nBlocksPerState[i])); -+ -+ if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), -+ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); -+ -+ if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Erased block count wrong dev %d count %d"TENDSTR), -+ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); -+ -+ if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), -+ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); -+ -+ T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); -+ -+} -+ -+/* -+ * Verify the object header. oh must be valid, but obj and tags may be NULL in which -+ * case those tests will not be performed. -+ */ -+static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) -+{ -+ if(yaffs_SkipVerification(obj->myDev)) -+ return; -+ -+ if(!(tags && obj && oh)){ -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), -+ (__u32)tags,(__u32)obj,(__u32)oh)); -+ return; -+ } -+ -+ if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || -+ oh->type > YAFFS_OBJECT_TYPE_MAX) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), -+ tags->objectId, oh->type)); -+ -+ if(tags->objectId != obj->objectId) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header mismatch objectId %d"TENDSTR), -+ tags->objectId, obj->objectId)); -+ -+ -+ /* -+ * Check that the object's parent ids match if parentCheck requested. -+ * -+ * Tests do not apply to the root object. -+ */ -+ -+ if(parentCheck && tags->objectId > 1 && !obj->parent) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), -+ tags->objectId, oh->parentObjectId)); -+ -+ -+ if(parentCheck && obj->parent && -+ oh->parentObjectId != obj->parent->objectId && -+ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || -+ obj->parent->objectId != YAFFS_OBJECTID_DELETED)) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), -+ tags->objectId, oh->parentObjectId, obj->parent->objectId)); -+ -+ -+ if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */ -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header name is NULL"TENDSTR), -+ obj->objectId)); -+ -+ if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d header name is 0xFF"TENDSTR), -+ obj->objectId)); -+} -+ -+ -+ -+static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn, -+ __u32 level, int chunkOffset) -+{ -+ int i; -+ yaffs_Device *dev = obj->myDev; -+ int ok = 1; -+ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; -+ -+ if (tn) { -+ if (level > 0) { -+ -+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ -+ if (tn->internal[i]) { -+ ok = yaffs_VerifyTnodeWorker(obj, -+ tn->internal[i], -+ level - 1, -+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); -+ } -+ } -+ } else if (level == 0) { -+ int i; -+ yaffs_ExtendedTags tags; -+ __u32 objectId = obj->objectId; -+ -+ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS; -+ -+ for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){ -+ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); -+ -+ if(theChunk > 0){ -+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */ -+ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); -+ if(tags.objectId != objectId || tags.chunkId != chunkOffset){ -+ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), -+ objectId, chunkOffset, theChunk, -+ tags.objectId, tags.chunkId)); -+ } -+ } -+ chunkOffset++; -+ } -+ } -+ } -+ -+ return ok; -+ -+} -+ -+ -+static void yaffs_VerifyFile(yaffs_Object *obj) -+{ -+ int requiredTallness; -+ int actualTallness; -+ __u32 lastChunk; -+ __u32 x; -+ __u32 i; -+ int ok; -+ yaffs_Device *dev; -+ yaffs_ExtendedTags tags; -+ yaffs_Tnode *tn; -+ __u32 objectId; -+ -+ if(obj && yaffs_SkipVerification(obj->myDev)) -+ return; -+ -+ dev = obj->myDev; -+ objectId = obj->objectId; -+ -+ /* Check file size is consistent with tnode depth */ -+ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; -+ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; -+ requiredTallness = 0; -+ while (x> 0) { -+ x >>= YAFFS_TNODES_INTERNAL_BITS; -+ requiredTallness++; -+ } -+ -+ actualTallness = obj->variant.fileVariant.topLevel; -+ -+ if(requiredTallness > actualTallness ) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), -+ obj->objectId,actualTallness, requiredTallness)); -+ -+ -+ /* Check that the chunks in the tnode tree are all correct. -+ * We do this by scanning through the tnode tree and -+ * checking the tags for every chunk match. -+ */ -+ -+ if(yaffs_SkipNANDVerification(dev)) -+ return; -+ -+ for(i = 1; i <= lastChunk; i++){ -+ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i); -+ -+ if (tn) { -+ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); -+ if(theChunk > 0){ -+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ -+ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); -+ if(tags.objectId != objectId || tags.chunkId != i){ -+ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), -+ objectId, i, theChunk, -+ tags.objectId, tags.chunkId)); -+ } -+ } -+ } -+ -+ } -+ -+} -+ -+static void yaffs_VerifyDirectory(yaffs_Object *obj) -+{ -+ if(obj && yaffs_SkipVerification(obj->myDev)) -+ return; -+ -+} -+ -+static void yaffs_VerifyHardLink(yaffs_Object *obj) -+{ -+ if(obj && yaffs_SkipVerification(obj->myDev)) -+ return; -+ -+ /* Verify sane equivalent object */ -+} -+ -+static void yaffs_VerifySymlink(yaffs_Object *obj) -+{ -+ if(obj && yaffs_SkipVerification(obj->myDev)) -+ return; -+ -+ /* Verify symlink string */ -+} -+ -+static void yaffs_VerifySpecial(yaffs_Object *obj) -+{ -+ if(obj && yaffs_SkipVerification(obj->myDev)) -+ return; -+} -+ -+static void yaffs_VerifyObject(yaffs_Object *obj) -+{ -+ yaffs_Device *dev; -+ -+ __u32 chunkMin; -+ __u32 chunkMax; -+ -+ __u32 chunkIdOk; -+ __u32 chunkIsLive; -+ -+ if(!obj) -+ return; -+ -+ dev = obj->myDev; -+ -+ if(yaffs_SkipVerification(dev)) -+ return; -+ -+ /* Check sane object header chunk */ -+ -+ chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; -+ chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; -+ -+ chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax); -+ chunkIsLive = chunkIdOk && -+ yaffs_CheckChunkBit(dev, -+ obj->chunkId / dev->nChunksPerBlock, -+ obj->chunkId % dev->nChunksPerBlock); -+ if(!obj->fake && -+ (!chunkIdOk || !chunkIsLive)) { -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), -+ obj->objectId,obj->chunkId, -+ chunkIdOk ? "" : ",out of range", -+ chunkIsLive || !chunkIdOk ? "" : ",marked as deleted")); -+ } -+ -+ if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) { -+ yaffs_ExtendedTags tags; -+ yaffs_ObjectHeader *oh; -+ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); -+ -+ oh = (yaffs_ObjectHeader *)buffer; -+ -+ yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags); -+ -+ yaffs_VerifyObjectHeader(obj,oh,&tags,1); -+ -+ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__); -+ } -+ -+ /* Verify it has a parent */ -+ if(obj && !obj->fake && -+ (!obj->parent || obj->parent->myDev != dev)){ -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), -+ obj->objectId,obj->parent)); -+ } -+ -+ /* Verify parent is a directory */ -+ if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), -+ obj->objectId,obj->parent->variantType)); -+ } -+ -+ switch(obj->variantType){ -+ case YAFFS_OBJECT_TYPE_FILE: -+ yaffs_VerifyFile(obj); -+ break; -+ case YAFFS_OBJECT_TYPE_SYMLINK: -+ yaffs_VerifySymlink(obj); -+ break; -+ case YAFFS_OBJECT_TYPE_DIRECTORY: -+ yaffs_VerifyDirectory(obj); -+ break; -+ case YAFFS_OBJECT_TYPE_HARDLINK: -+ yaffs_VerifyHardLink(obj); -+ break; -+ case YAFFS_OBJECT_TYPE_SPECIAL: -+ yaffs_VerifySpecial(obj); -+ break; -+ case YAFFS_OBJECT_TYPE_UNKNOWN: -+ default: -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Obj %d has illegaltype %d"TENDSTR), -+ obj->objectId,obj->variantType)); -+ break; -+ } -+ -+ -+} -+ -+static void yaffs_VerifyObjects(yaffs_Device *dev) -+{ -+ yaffs_Object *obj; -+ int i; -+ struct list_head *lh; -+ -+ if(yaffs_SkipVerification(dev)) -+ return; -+ -+ /* Iterate through the objects in each hash entry */ -+ -+ for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){ -+ list_for_each(lh, &dev->objectBucket[i].list) { -+ if (lh) { -+ obj = list_entry(lh, yaffs_Object, hashLink); -+ yaffs_VerifyObject(obj); -+ } -+ } -+ } -+ -+} -+ -+ -+/* -+ * Simple hash function. Needs to have a reasonable spread -+ */ -+ -+static Y_INLINE int yaffs_HashFunction(int n) -+{ -+ n = abs(n); -+ return (n % YAFFS_NOBJECT_BUCKETS); -+} -+ -+/* -+ * Access functions to useful fake objects -+ */ -+ -+yaffs_Object *yaffs_Root(yaffs_Device * dev) -+{ -+ return dev->rootDir; -+} -+ -+yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) -+{ -+ return dev->lostNFoundDir; -+} -+ -+ -+/* -+ * Erased NAND checking functions -+ */ -+ -+int yaffs_CheckFF(__u8 * buffer, int nBytes) -+{ -+ /* Horrible, slow implementation */ -+ while (nBytes--) { -+ if (*buffer != 0xFF) -+ return 0; -+ buffer++; -+ } -+ return 1; -+} -+ -+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, -+ int chunkInNAND) -+{ -+ -+ int retval = YAFFS_OK; -+ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); -+ yaffs_ExtendedTags tags; -+ int result; -+ -+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); -+ -+ if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) -+ retval = YAFFS_FAIL; -+ -+ -+ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { -+ T(YAFFS_TRACE_NANDACCESS, -+ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); -+ retval = YAFFS_FAIL; -+ } -+ -+ yaffs_ReleaseTempBuffer(dev, data, __LINE__); -+ -+ return retval; -+ -+} -+ -+ -+static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, -+ const __u8 * data, -+ yaffs_ExtendedTags * tags, -+ int useReserve) -+{ -+ int attempts = 0; -+ int writeOk = 0; -+ int chunk; -+ -+ yaffs_InvalidateCheckpoint(dev); -+ -+ do { -+ yaffs_BlockInfo *bi = 0; -+ int erasedOk = 0; -+ -+ chunk = yaffs_AllocateChunk(dev, useReserve, &bi); -+ if (chunk < 0) { -+ /* no space */ -+ break; -+ } -+ -+ /* First check this chunk is erased, if it needs -+ * checking. The checking policy (unless forced -+ * always on) is as follows: -+ * -+ * Check the first page we try to write in a block. -+ * If the check passes then we don't need to check any -+ * more. If the check fails, we check again... -+ * If the block has been erased, we don't need to check. -+ * -+ * However, if the block has been prioritised for gc, -+ * then we think there might be something odd about -+ * this block and stop using it. -+ * -+ * Rationale: We should only ever see chunks that have -+ * not been erased if there was a partially written -+ * chunk due to power loss. This checking policy should -+ * catch that case with very few checks and thus save a -+ * lot of checks that are most likely not needed. -+ */ -+ if (bi->gcPrioritise) { -+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__); -+ /* try another chunk */ -+ continue; -+ } -+ -+ /* let's give it a try */ -+ attempts++; -+ -+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED -+ bi->skipErasedCheck = 0; -+#endif -+ if (!bi->skipErasedCheck) { -+ erasedOk = yaffs_CheckChunkErased(dev, chunk); -+ if (erasedOk != YAFFS_OK) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR ("**>> yaffs chunk %d was not erased" -+ TENDSTR), chunk)); -+ -+ /* try another chunk */ -+ continue; -+ } -+ bi->skipErasedCheck = 1; -+ } -+ -+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, -+ data, tags); -+ if (writeOk != YAFFS_OK) { -+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk); -+ /* try another chunk */ -+ continue; -+ } -+ -+ /* Copy the data into the robustification buffer */ -+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags); -+ -+ } while (writeOk != YAFFS_OK && attempts < yaffs_wr_attempts); -+ -+ if (attempts > 1) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("**>> yaffs write required %d attempts" TENDSTR), -+ attempts)); -+ -+ dev->nRetriedWrites += (attempts - 1); -+ } -+ -+ return chunk; -+} -+ -+/* -+ * Block retiring for handling a broken block. -+ */ -+ -+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) -+{ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); -+ -+ yaffs_InvalidateCheckpoint(dev); -+ -+ yaffs_MarkBlockBad(dev, blockInNAND); -+ -+ bi->blockState = YAFFS_BLOCK_STATE_DEAD; -+ bi->gcPrioritise = 0; -+ bi->needsRetiring = 0; -+ -+ dev->nRetiredBlocks++; -+} -+ -+/* -+ * Functions for robustisizing TODO -+ * -+ */ -+ -+static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, -+ const yaffs_ExtendedTags * tags) -+{ -+} -+ -+static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, -+ const yaffs_ExtendedTags * tags) -+{ -+} -+ -+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) -+{ -+ if(!bi->gcPrioritise){ -+ bi->gcPrioritise = 1; -+ dev->hasPendingPrioritisedGCs = 1; -+ bi->chunkErrorStrikes ++; -+ -+ if(bi->chunkErrorStrikes > 3){ -+ bi->needsRetiring = 1; /* Too many stikes, so retire this */ -+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); -+ -+ } -+ -+ } -+} -+ -+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk) -+{ -+ -+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock; -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); -+ -+ yaffs_HandleChunkError(dev,bi); -+ -+ -+ if(erasedOk ) { -+ /* Was an actual write failure, so mark the block for retirement */ -+ bi->needsRetiring = 1; -+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, -+ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); -+ -+ -+ } -+ -+ /* Delete the chunk */ -+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -+} -+ -+ -+/*---------------- Name handling functions ------------*/ -+ -+static __u16 yaffs_CalcNameSum(const YCHAR * name) -+{ -+ __u16 sum = 0; -+ __u16 i = 1; -+ -+ YUCHAR *bname = (YUCHAR *) name; -+ if (bname) { -+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { -+ -+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE -+ sum += yaffs_toupper(*bname) * i; -+#else -+ sum += (*bname) * i; -+#endif -+ i++; -+ bname++; -+ } -+ } -+ return sum; -+} -+ -+static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) -+{ -+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM -+ if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { -+ yaffs_strcpy(obj->shortName, name); -+ } else { -+ obj->shortName[0] = _Y('\0'); -+ } -+#endif -+ obj->sum = yaffs_CalcNameSum(name); -+} -+ -+/*-------------------- TNODES ------------------- -+ -+ * List of spare tnodes -+ * The list is hooked together using the first pointer -+ * in the tnode. -+ */ -+ -+/* yaffs_CreateTnodes creates a bunch more tnodes and -+ * adds them to the tnode free list. -+ * Don't use this function directly -+ */ -+ -+static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) -+{ -+ int i; -+ int tnodeSize; -+ yaffs_Tnode *newTnodes; -+ __u8 *mem; -+ yaffs_Tnode *curr; -+ yaffs_Tnode *next; -+ yaffs_TnodeList *tnl; -+ -+ if (nTnodes < 1) -+ return YAFFS_OK; -+ -+ /* Calculate the tnode size in bytes for variable width tnode support. -+ * Must be a multiple of 32-bits */ -+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; -+ -+ /* make these things */ -+ -+ newTnodes = YMALLOC(nTnodes * tnodeSize); -+ mem = (__u8 *)newTnodes; -+ -+ if (!newTnodes) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); -+ return YAFFS_FAIL; -+ } -+ -+ /* Hook them into the free list */ -+#if 0 -+ for (i = 0; i < nTnodes - 1; i++) { -+ newTnodes[i].internal[0] = &newTnodes[i + 1]; -+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG -+ newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -+#endif -+ } -+ -+ newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG -+ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -+#endif -+ dev->freeTnodes = newTnodes; -+#else -+ /* New hookup for wide tnodes */ -+ for(i = 0; i < nTnodes -1; i++) { -+ curr = (yaffs_Tnode *) &mem[i * tnodeSize]; -+ next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; -+ curr->internal[0] = next; -+ } -+ -+ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; -+ curr->internal[0] = dev->freeTnodes; -+ dev->freeTnodes = (yaffs_Tnode *)mem; -+ -+#endif -+ -+ -+ dev->nFreeTnodes += nTnodes; -+ dev->nTnodesCreated += nTnodes; -+ -+ /* Now add this bunch of tnodes to a list for freeing up. -+ * NB If we can't add this to the management list it isn't fatal -+ * but it just means we can't free this bunch of tnodes later. -+ */ -+ -+ tnl = YMALLOC(sizeof(yaffs_TnodeList)); -+ if (!tnl) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("yaffs: Could not add tnodes to management list" TENDSTR))); -+ return YAFFS_FAIL; -+ -+ } else { -+ tnl->tnodes = newTnodes; -+ tnl->next = dev->allocatedTnodeList; -+ dev->allocatedTnodeList = tnl; -+ } -+ -+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); -+ -+ return YAFFS_OK; -+} -+ -+/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ -+ -+static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev) -+{ -+ yaffs_Tnode *tn = NULL; -+ -+ /* If there are none left make more */ -+ if (!dev->freeTnodes) { -+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); -+ } -+ -+ if (dev->freeTnodes) { -+ tn = dev->freeTnodes; -+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG -+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { -+ /* Hoosterman, this thing looks like it isn't in the list */ -+ T(YAFFS_TRACE_ALWAYS, -+ (TSTR("yaffs: Tnode list bug 1" TENDSTR))); -+ } -+#endif -+ dev->freeTnodes = dev->freeTnodes->internal[0]; -+ dev->nFreeTnodes--; -+ } -+ -+ return tn; -+} -+ -+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) -+{ -+ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); -+ -+ if(tn) -+ memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); -+ -+ 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; -+ -+} -+ -+ -+void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val) -+{ -+ __u32 *map = (__u32 *)tn; -+ __u32 bitInMap; -+ __u32 bitInWord; -+ __u32 wordInMap; -+ __u32 mask; -+ -+ pos &= YAFFS_TNODES_LEVEL0_MASK; -+ val >>= dev->chunkGroupBits; -+ -+ bitInMap = pos * dev->tnodeWidth; -+ wordInMap = bitInMap /32; -+ bitInWord = bitInMap & (32 -1); -+ -+ mask = dev->tnodeMask << bitInWord; -+ -+ map[wordInMap] &= ~mask; -+ map[wordInMap] |= (mask & (val << bitInWord)); -+ -+ if(dev->tnodeWidth > (32-bitInWord)) { -+ bitInWord = (32 - bitInWord); -+ wordInMap++;; -+ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); -+ map[wordInMap] &= ~mask; -+ map[wordInMap] |= (mask & (val >> bitInWord)); -+ } -+} -+ -+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos) -+{ -+ __u32 *map = (__u32 *)tn; -+ __u32 bitInMap; -+ __u32 bitInWord; -+ __u32 wordInMap; -+ __u32 val; -+ -+ pos &= YAFFS_TNODES_LEVEL0_MASK; -+ -+ bitInMap = pos * dev->tnodeWidth; -+ wordInMap = bitInMap /32; -+ bitInWord = bitInMap & (32 -1); -+ -+ val = map[wordInMap] >> bitInWord; -+ -+ if(dev->tnodeWidth > (32-bitInWord)) { -+ bitInWord = (32 - bitInWord); -+ wordInMap++;; -+ val |= (map[wordInMap] << bitInWord); -+ } -+ -+ val &= dev->tnodeMask; -+ val <<= dev->chunkGroupBits; -+ -+ return val; -+} -+ -+/* ------------------- End of individual tnode manipulation -----------------*/ -+ -+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ -+ * The look up tree is represented by the top tnode and the number of topLevel -+ * in the tree. 0 means only the level 0 tnode is in the tree. -+ */ -+ -+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, -+ yaffs_FileStructure * fStruct, -+ __u32 chunkId) -+{ -+ -+ yaffs_Tnode *tn = fStruct->top; -+ __u32 i; -+ int requiredTallness; -+ int level = fStruct->topLevel; -+ -+ /* Check sane level and chunk Id */ -+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { -+ return NULL; -+ } -+ -+ if (chunkId > YAFFS_MAX_CHUNK_ID) { -+ return NULL; -+ } -+ -+ /* First check we're tall enough (ie enough topLevel) */ -+ -+ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; -+ requiredTallness = 0; -+ while (i) { -+ i >>= YAFFS_TNODES_INTERNAL_BITS; -+ requiredTallness++; -+ } -+ -+ if (requiredTallness > fStruct->topLevel) { -+ /* 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 >> -+ ( YAFFS_TNODES_LEVEL0_BITS + -+ (level - 1) * -+ YAFFS_TNODES_INTERNAL_BITS) -+ ) & -+ YAFFS_TNODES_INTERNAL_MASK]; -+ level--; -+ -+ } -+ -+ return tn; -+} -+ -+/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. -+ * This happens in two steps: -+ * 1. If the tree isn't tall enough, then make it taller. -+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. -+ * -+ * Used when modifying the tree. -+ * -+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will -+ * be plugged into the ttree. -+ */ -+ -+static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, -+ yaffs_FileStructure * fStruct, -+ __u32 chunkId, -+ yaffs_Tnode *passedTn) -+{ -+ -+ int requiredTallness; -+ int i; -+ int l; -+ yaffs_Tnode *tn; -+ -+ __u32 x; -+ -+ -+ /* Check sane level and page Id */ -+ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { -+ return NULL; -+ } -+ -+ if (chunkId > YAFFS_MAX_CHUNK_ID) { -+ return NULL; -+ } -+ -+ /* First check we're tall enough (ie enough topLevel) */ -+ -+ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; -+ requiredTallness = 0; -+ while (x) { -+ x >>= YAFFS_TNODES_INTERNAL_BITS; -+ requiredTallness++; -+ } -+ -+ -+ if (requiredTallness > fStruct->topLevel) { -+ /* Not tall enough,gotta make the tree taller */ -+ for (i = fStruct->topLevel; i < requiredTallness; i++) { -+ -+ tn = yaffs_GetTnode(dev); -+ -+ if (tn) { -+ tn->internal[0] = fStruct->top; -+ fStruct->top = tn; -+ } else { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("yaffs: no more tnodes" TENDSTR))); -+ } -+ } -+ -+ fStruct->topLevel = requiredTallness; -+ } -+ -+ /* Traverse down to level 0, adding anything we need */ -+ -+ l = fStruct->topLevel; -+ tn = fStruct->top; -+ -+ if(l > 0) { -+ while (l > 0 && tn) { -+ x = (chunkId >> -+ ( YAFFS_TNODES_LEVEL0_BITS + -+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & -+ YAFFS_TNODES_INTERNAL_MASK; -+ -+ -+ if((l>1) && !tn->internal[x]){ -+ /* Add missing non-level-zero tnode */ -+ tn->internal[x] = yaffs_GetTnode(dev); -+ -+ } else if(l == 1) { -+ /* Looking from level 1 at level 0 */ -+ if (passedTn) { -+ /* If we already have one, then release it.*/ -+ if(tn->internal[x]) -+ yaffs_FreeTnode(dev,tn->internal[x]); -+ tn->internal[x] = passedTn; -+ -+ } else if(!tn->internal[x]) { -+ /* Don't have one, none passed in */ -+ tn->internal[x] = yaffs_GetTnode(dev); -+ } -+ } -+ -+ tn = tn->internal[x]; -+ l--; -+ } -+ } else { -+ /* top is level 0 */ -+ if(passedTn) { -+ memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); -+ yaffs_FreeTnode(dev,passedTn); -+ } -+ } -+ -+ return tn; -+} -+ -+static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, -+ yaffs_ExtendedTags * tags, int objectId, -+ int chunkInInode) -+{ -+ int j; -+ -+ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { -+ if (yaffs_CheckChunkBit -+ (dev, theChunk / dev->nChunksPerBlock, -+ theChunk % dev->nChunksPerBlock)) { -+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, -+ tags); -+ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { -+ /* found it; */ -+ return theChunk; -+ -+ } -+ } -+ theChunk++; -+ } -+ return -1; -+} -+ -+ -+/* DeleteWorker scans backwards through the tnode tree and deletes all the -+ * chunks and tnodes in the file -+ * Returns 1 if the tree was deleted. -+ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. -+ */ -+ -+static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level, -+ int chunkOffset, int *limit) -+{ -+ int i; -+ int chunkInInode; -+ int theChunk; -+ yaffs_ExtendedTags tags; -+ int foundChunk; -+ yaffs_Device *dev = in->myDev; -+ -+ int allDone = 1; -+ -+ if (tn) { -+ if (level > 0) { -+ -+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; -+ i--) { -+ if (tn->internal[i]) { -+ if (limit && (*limit) < 0) { -+ allDone = 0; -+ } else { -+ allDone = -+ yaffs_DeleteWorker(in, -+ tn-> -+ internal -+ [i], -+ level - -+ 1, -+ (chunkOffset -+ << -+ YAFFS_TNODES_INTERNAL_BITS) -+ + i, -+ limit); -+ } -+ if (allDone) { -+ yaffs_FreeTnode(dev, -+ tn-> -+ internal[i]); -+ tn->internal[i] = NULL; -+ } -+ } -+ -+ } -+ return (allDone) ? 1 : 0; -+ } else if (level == 0) { -+ int hitLimit = 0; -+ -+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; -+ i--) { -+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i); -+ if (theChunk) { -+ -+ chunkInInode = -+ (chunkOffset << -+ YAFFS_TNODES_LEVEL0_BITS) + i; -+ -+ foundChunk = -+ yaffs_FindChunkInGroup(dev, -+ theChunk, -+ &tags, -+ in->objectId, -+ chunkInInode); -+ -+ if (foundChunk > 0) { -+ yaffs_DeleteChunk(dev, -+ foundChunk, 1, -+ __LINE__); -+ in->nDataChunks--; -+ if (limit) { -+ *limit = *limit - 1; -+ if (*limit <= 0) { -+ hitLimit = 1; -+ } -+ } -+ -+ } -+ -+ yaffs_PutLevel0Tnode(dev,tn,i,0); -+ } -+ -+ } -+ return (i < 0) ? 1 : 0; -+ -+ } -+ -+ } -+ -+ return 1; -+ -+} -+ -+static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) -+{ -+ -+ yaffs_BlockInfo *theBlock; -+ -+ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); -+ -+ theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); -+ if (theBlock) { -+ theBlock->softDeletions++; -+ dev->nFreeChunks++; -+ } -+} -+ -+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. -+ * All soft deleting does is increment the block's softdelete count and pulls the chunk out -+ * of the tnode. -+ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. -+ */ -+ -+static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, -+ __u32 level, int chunkOffset) -+{ -+ int i; -+ int theChunk; -+ int allDone = 1; -+ yaffs_Device *dev = in->myDev; -+ -+ if (tn) { -+ if (level > 0) { -+ -+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; -+ i--) { -+ if (tn->internal[i]) { -+ allDone = -+ yaffs_SoftDeleteWorker(in, -+ tn-> -+ internal[i], -+ level - 1, -+ (chunkOffset -+ << -+ YAFFS_TNODES_INTERNAL_BITS) -+ + i); -+ if (allDone) { -+ yaffs_FreeTnode(dev, -+ tn-> -+ internal[i]); -+ tn->internal[i] = NULL; -+ } else { -+ /* Hoosterman... how could this happen? */ -+ } -+ } -+ } -+ return (allDone) ? 1 : 0; -+ } else if (level == 0) { -+ -+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { -+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i); -+ if (theChunk) { -+ /* Note this does not find the real chunk, only the chunk group. -+ * We make an assumption that a chunk group is not larger than -+ * a block. -+ */ -+ yaffs_SoftDeleteChunk(dev, theChunk); -+ yaffs_PutLevel0Tnode(dev,tn,i,0); -+ } -+ -+ } -+ return 1; -+ -+ } -+ -+ } -+ -+ return 1; -+ -+} -+ -+static void yaffs_SoftDeleteFile(yaffs_Object * obj) -+{ -+ if (obj->deleted && -+ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { -+ if (obj->nDataChunks <= 0) { -+ /* Empty file with no duplicate object headers, just delete it immediately */ -+ yaffs_FreeTnode(obj->myDev, -+ obj->variant.fileVariant.top); -+ obj->variant.fileVariant.top = NULL; -+ T(YAFFS_TRACE_TRACING, -+ (TSTR("yaffs: Deleting empty file %d" TENDSTR), -+ obj->objectId)); -+ yaffs_DoGenericObjectDeletion(obj); -+ } else { -+ yaffs_SoftDeleteWorker(obj, -+ obj->variant.fileVariant.top, -+ obj->variant.fileVariant. -+ topLevel, 0); -+ obj->softDeleted = 1; -+ } -+ } -+} -+ -+/* Pruning removes any part of the file structure tree that is beyond the -+ * bounds of the file (ie that does not point to chunks). -+ * -+ * A file should only get pruned when its size is reduced. -+ * -+ * Before pruning, the chunks must be pulled from the tree and the -+ * level 0 tnode entries must be zeroed out. -+ * Could also use this for file deletion, but that's probably better handled -+ * by a special case. -+ */ -+ -+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, -+ __u32 level, int del0) -+{ -+ int i; -+ int hasData; -+ -+ if (tn) { -+ hasData = 0; -+ -+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { -+ if (tn->internal[i] && level > 0) { -+ tn->internal[i] = -+ yaffs_PruneWorker(dev, tn->internal[i], -+ level - 1, -+ (i == 0) ? del0 : 1); -+ } -+ -+ if (tn->internal[i]) { -+ hasData++; -+ } -+ } -+ -+ if (hasData == 0 && del0) { -+ /* Free and return NULL */ -+ -+ yaffs_FreeTnode(dev, tn); -+ tn = NULL; -+ } -+ -+ } -+ -+ return tn; -+ -+} -+ -+static int yaffs_PruneFileStructure(yaffs_Device * dev, -+ yaffs_FileStructure * fStruct) -+{ -+ int i; -+ int hasData; -+ int done = 0; -+ yaffs_Tnode *tn; -+ -+ if (fStruct->topLevel > 0) { -+ fStruct->top = -+ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); -+ -+ /* Now we have a tree with all the non-zero branches NULL but the height -+ * is the same as it was. -+ * Let's see if we can trim internal tnodes to shorten the tree. -+ * We can do this if only the 0th element in the tnode is in use -+ * (ie all the non-zero are NULL) -+ */ -+ -+ while (fStruct->topLevel && !done) { -+ tn = fStruct->top; -+ -+ hasData = 0; -+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { -+ if (tn->internal[i]) { -+ hasData++; -+ } -+ } -+ -+ if (!hasData) { -+ fStruct->top = tn->internal[0]; -+ fStruct->topLevel--; -+ yaffs_FreeTnode(dev, tn); -+ } else { -+ done = 1; -+ } -+ } -+ } -+ -+ return YAFFS_OK; -+} -+ -+/*-------------------- End of File Structure functions.-------------------*/ -+ -+/* yaffs_CreateFreeObjects creates a bunch more objects and -+ * adds them to the object free list. -+ */ -+static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) -+{ -+ int i; -+ yaffs_Object *newObjects; -+ yaffs_ObjectList *list; -+ -+ if (nObjects < 1) -+ return YAFFS_OK; -+ -+ /* make these things */ -+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); -+ list = YMALLOC(sizeof(yaffs_ObjectList)); -+ -+ if (!newObjects || !list) { -+ if(newObjects) -+ YFREE(newObjects); -+ if(list) -+ YFREE(list); -+ T(YAFFS_TRACE_ALLOCATE, -+ (TSTR("yaffs: Could not allocate more objects" TENDSTR))); -+ return YAFFS_FAIL; -+ } -+ -+ /* Hook them into the free list */ -+ for (i = 0; i < nObjects - 1; i++) { -+ newObjects[i].siblings.next = -+ (struct 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->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; -+ } -+ } -+ } -+ } -+ -+ -+ return n; -+} -+ -+static void yaffs_HashObject(yaffs_Object * in) -+{ -+ int bucket = yaffs_HashFunction(in->objectId); -+ yaffs_Device *dev = in->myDev; -+ -+ 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; -+ yaffs_Tnode *tn; -+ -+ if (number < 0) { -+ number = yaffs_CreateNewObjectNumber(dev); -+ } -+ -+ theObject = yaffs_AllocateEmptyObject(dev); -+ if(!theObject) -+ return NULL; -+ -+ if(type == YAFFS_OBJECT_TYPE_FILE){ -+ tn = yaffs_GetTnode(dev); -+ if(!tn){ -+ yaffs_FreeObject(theObject); -+ return NULL; -+ } -+ } -+ -+ -+ -+ if (theObject) { -+ theObject->fake = 0; -+ theObject->renameAllowed = 1; -+ theObject->unlinkAllowed = 1; -+ theObject->objectId = number; -+ yaffs_HashObject(theObject); -+ theObject->variantType = type; -+#ifdef CONFIG_YAFFS_WINCE -+ yfsd_WinFileTimeNow(theObject->win_atime); -+ theObject->win_ctime[0] = theObject->win_mtime[0] = -+ theObject->win_atime[0]; -+ theObject->win_ctime[1] = theObject->win_mtime[1] = -+ theObject->win_atime[1]; -+ -+#else -+ -+ theObject->yst_atime = theObject->yst_mtime = -+ theObject->yst_ctime = Y_CURRENT_TIME; -+#endif -+ switch (type) { -+ case YAFFS_OBJECT_TYPE_FILE: -+ theObject->variant.fileVariant.fileSize = 0; -+ theObject->variant.fileVariant.scannedFileSize = 0; -+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ -+ theObject->variant.fileVariant.topLevel = 0; -+ theObject->variant.fileVariant.top = tn; -+ break; -+ case YAFFS_OBJECT_TYPE_DIRECTORY: -+ INIT_LIST_HEAD(&theObject->variant.directoryVariant. -+ children); -+ break; -+ case YAFFS_OBJECT_TYPE_SYMLINK: -+ case YAFFS_OBJECT_TYPE_HARDLINK: -+ case YAFFS_OBJECT_TYPE_SPECIAL: -+ /* No action required */ -+ break; -+ case YAFFS_OBJECT_TYPE_UNKNOWN: -+ /* todo this should not happen */ -+ break; -+ } -+ } -+ -+ return theObject; -+} -+ -+static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev, -+ int number, -+ yaffs_ObjectType type) -+{ -+ yaffs_Object *theObject = NULL; -+ -+ if (number > 0) { -+ theObject = yaffs_FindObjectByNumber(dev, number); -+ } -+ -+ if (!theObject) { -+ theObject = yaffs_CreateNewObject(dev, number, type); -+ } -+ -+ return theObject; -+ -+} -+ -+ -+static YCHAR *yaffs_CloneString(const YCHAR * str) -+{ -+ YCHAR *newStr = NULL; -+ -+ if (str && *str) { -+ newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); -+ if(newStr) -+ yaffs_strcpy(newStr, str); -+ } -+ -+ return newStr; -+ -+} -+ -+/* -+ * Mknod (create) a new object. -+ * equivalentObject only has meaning for a hard link; -+ * aliasString only has meaning for a sumlink. -+ * rdev only has meaning for devices (a subset of special objects) -+ */ -+ -+static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, -+ yaffs_Object * parent, -+ const YCHAR * name, -+ __u32 mode, -+ __u32 uid, -+ __u32 gid, -+ yaffs_Object * equivalentObject, -+ const YCHAR * aliasString, __u32 rdev) -+{ -+ yaffs_Object *in; -+ YCHAR *str; -+ -+ 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(type == YAFFS_OBJECT_TYPE_SYMLINK){ -+ str = yaffs_CloneString(aliasString); -+ if(!str){ -+ yaffs_FreeObject(in); -+ return NULL; -+ } -+ } -+ -+ -+ -+ 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 = str; -+ 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: -+ case YAFFS_OBJECT_TYPE_DIRECTORY: -+ case YAFFS_OBJECT_TYPE_SPECIAL: -+ case YAFFS_OBJECT_TYPE_UNKNOWN: -+ /* do nothing */ -+ break; -+ } -+ -+ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { -+ /* Could not create the object header, fail the creation */ -+ yaffs_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); -+} -+ -+/* 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. -+ * else only proceed if the new name does not exist and if we're putting -+ * it into a directory. -+ */ -+ if ((unlinkOp || -+ deleteOp || -+ force || -+ (shadows > 0) || -+ !existingTarget) && -+ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { -+ yaffs_SetObjectName(obj, newName); -+ obj->dirty = 1; -+ -+ yaffs_AddObjectToDirectory(newDir, obj); -+ -+ if (unlinkOp) -+ obj->unlinked = 1; -+ -+ /* If it is a deletion then we mark it as a shrink for gc purposes. */ -+ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0) -+ return YAFFS_OK; -+ } -+ -+ return YAFFS_FAIL; -+} -+ -+int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, -+ yaffs_Object * newDir, const YCHAR * newName) -+{ -+ yaffs_Object *obj; -+ 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); -+ /* Check new name to long. */ -+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK && -+ yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH) -+ /* ENAMETOOLONG */ -+ return YAFFS_FAIL; -+ else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK && -+ yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) -+ /* ENAMETOOLONG */ -+ return YAFFS_FAIL; -+ -+ 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 fail */ -+ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ -+ } else if (existingTarget && existingTarget != obj) { -+ /* Nuke the target first, using shadowing, -+ * but only if it isn't the same object -+ */ -+ yaffs_ChangeObjectName(obj, newDir, newName, force, -+ existingTarget->objectId); -+ yaffs_UnlinkObject(existingTarget); -+ } -+ -+ return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); -+ } -+ return YAFFS_FAIL; -+} -+ -+/*------------------------- Block Management and Page Allocation ----------------*/ -+ -+static int yaffs_InitialiseBlocks(yaffs_Device * dev) -+{ -+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; -+ -+ dev->blockInfo = NULL; -+ dev->chunkBits = NULL; -+ -+ dev->allocationBlock = -1; /* force it to get a new one */ -+ -+ /* If the first allocation strategy fails, thry the alternate one */ -+ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); -+ if(!dev->blockInfo){ -+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); -+ dev->blockInfoAlt = 1; -+ } -+ else -+ dev->blockInfoAlt = 0; -+ -+ if(dev->blockInfo){ -+ -+ /* Set up dynamic blockinfo stuff. */ -+ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ -+ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); -+ if(!dev->chunkBits){ -+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); -+ dev->chunkBitsAlt = 1; -+ } -+ else -+ dev->chunkBitsAlt = 0; -+ } -+ -+ if (dev->blockInfo && dev->chunkBits) { -+ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); -+ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); -+ return YAFFS_OK; -+ } -+ -+ return YAFFS_FAIL; -+ -+} -+ -+static void yaffs_DeinitialiseBlocks(yaffs_Device * dev) -+{ -+ if(dev->blockInfoAlt && dev->blockInfo) -+ YFREE_ALT(dev->blockInfo); -+ else if(dev->blockInfo) -+ YFREE(dev->blockInfo); -+ -+ dev->blockInfoAlt = 0; -+ -+ dev->blockInfo = NULL; -+ -+ if(dev->chunkBitsAlt && dev->chunkBits) -+ YFREE_ALT(dev->chunkBits); -+ else if(dev->chunkBits) -+ YFREE(dev->chunkBits); -+ dev->chunkBitsAlt = 0; -+ dev->chunkBits = NULL; -+} -+ -+static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev, -+ yaffs_BlockInfo * bi) -+{ -+ int i; -+ __u32 seq; -+ yaffs_BlockInfo *b; -+ -+ if (!dev->isYaffs2) -+ return 1; /* disqualification only applies to yaffs2. */ -+ -+ if (!bi->hasShrinkHeader) -+ return 1; /* can gc */ -+ -+ /* Find the oldest dirty sequence number if we don't know it and save it -+ * so we don't have to keep recomputing it. -+ */ -+ if (!dev->oldestDirtySequence) { -+ seq = dev->sequenceNumber; -+ -+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; -+ i++) { -+ b = yaffs_GetBlockInfo(dev, i); -+ if (b->blockState == YAFFS_BLOCK_STATE_FULL && -+ (b->pagesInUse - b->softDeletions) < -+ dev->nChunksPerBlock && b->sequenceNumber < seq) { -+ seq = b->sequenceNumber; -+ } -+ } -+ dev->oldestDirtySequence = seq; -+ } -+ -+ /* Can't do gc of this block if there are any blocks older than this one that have -+ * discarded pages. -+ */ -+ return (bi->sequenceNumber <= dev->oldestDirtySequence); -+ -+} -+ -+/* FindDiretiestBlock is used to select the dirtiest block (or close enough) -+ * for garbage collection. -+ */ -+ -+static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, -+ int aggressive) -+{ -+ -+ int b = dev->currentDirtyChecker; -+ -+ int i; -+ int iterations; -+ int dirtiest = -1; -+ int pagesInUse = 0; -+ int prioritised=0; -+ yaffs_BlockInfo *bi; -+ int pendingPrioritisedExist = 0; -+ -+ /* First let's see if we need to grab a prioritised block */ -+ if(dev->hasPendingPrioritisedGCs){ -+ for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){ -+ -+ bi = yaffs_GetBlockInfo(dev, i); -+ //yaffs_VerifyBlock(dev,bi,i); -+ -+ if(bi->gcPrioritise) { -+ pendingPrioritisedExist = 1; -+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL && -+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)){ -+ pagesInUse = (bi->pagesInUse - bi->softDeletions); -+ dirtiest = i; -+ prioritised = 1; -+ aggressive = 1; /* Fool the non-aggressive skip logiv below */ -+ } -+ } -+ } -+ -+ if(!pendingPrioritisedExist) /* None found, so we can clear this */ -+ dev->hasPendingPrioritisedGCs = 0; -+ } -+ -+ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and -+ * search harder. -+ * else (we're doing a leasurely gc), then we only bother to do this if the -+ * block has only a few pages in use. -+ */ -+ -+ dev->nonAggressiveSkip--; -+ -+ if (!aggressive && (dev->nonAggressiveSkip > 0)) { -+ return -1; -+ } -+ -+ if(!prioritised) -+ pagesInUse = -+ (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; -+ -+ if (aggressive) { -+ iterations = -+ dev->internalEndBlock - dev->internalStartBlock + 1; -+ } else { -+ iterations = -+ dev->internalEndBlock - dev->internalStartBlock + 1; -+ iterations = iterations / 16; -+ if (iterations > 200) { -+ iterations = 200; -+ } -+ } -+ -+ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { -+ b++; -+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) { -+ b = dev->internalStartBlock; -+ } -+ -+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("**>> Block %d is not valid" TENDSTR), b)); -+ YBUG(); -+ } -+ -+ bi = yaffs_GetBlockInfo(dev, b); -+ -+#if 0 -+ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { -+ dirtiest = b; -+ pagesInUse = 0; -+ } -+ else -+#endif -+ -+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL && -+ (bi->pagesInUse - bi->softDeletions) < pagesInUse && -+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { -+ dirtiest = b; -+ pagesInUse = (bi->pagesInUse - bi->softDeletions); -+ } -+ } -+ -+ dev->currentDirtyChecker = b; -+ -+ if (dirtiest > 0) { -+ T(YAFFS_TRACE_GC, -+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, -+ dev->nChunksPerBlock - pagesInUse,prioritised)); -+ } -+ -+ dev->oldestDirtySequence = 0; -+ -+ if (dirtiest > 0) { -+ dev->nonAggressiveSkip = 4; -+ } -+ -+ return dirtiest; -+} -+ -+static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) -+{ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); -+ -+ int erasedOk = 0; -+ -+ /* If the block is still healthy erase it and mark as clean. -+ * If the block has had a data failure, then retire it. -+ */ -+ -+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, -+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), -+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); -+ -+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY; -+ -+ if (!bi->needsRetiring) { -+ yaffs_InvalidateCheckpoint(dev); -+ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); -+ if (!erasedOk) { -+ dev->nErasureFailures++; -+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, -+ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); -+ } -+ } -+ -+ if (erasedOk && -+ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { -+ int i; -+ for (i = 0; i < dev->nChunksPerBlock; i++) { -+ if (!yaffs_CheckChunkErased -+ (dev, blockNo * dev->nChunksPerBlock + i)) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ (">>Block %d erasure supposedly OK, but chunk %d not erased" -+ TENDSTR), blockNo, i)); -+ } -+ } -+ } -+ -+ if (erasedOk) { -+ /* Clean it up... */ -+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY; -+ dev->nErasedBlocks++; -+ bi->pagesInUse = 0; -+ bi->softDeletions = 0; -+ bi->hasShrinkHeader = 0; -+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */ -+ bi->gcPrioritise = 0; -+ yaffs_ClearChunkBits(dev, blockNo); -+ -+ T(YAFFS_TRACE_ERASE, -+ (TSTR("Erased block %d" TENDSTR), blockNo)); -+ } else { -+ dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */ -+ -+ yaffs_RetireBlock(dev, blockNo); -+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, -+ (TSTR("**>> Block %d retired" TENDSTR), blockNo)); -+ } -+} -+ -+static int yaffs_FindBlockForAllocation(yaffs_Device * dev) -+{ -+ int i; -+ -+ yaffs_BlockInfo *bi; -+ -+ if (dev->nErasedBlocks < 1) { -+ /* Hoosterman we've got a problem. -+ * Can't get space to gc -+ */ -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("yaffs tragedy: no more 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; -+} -+ -+ -+// Check if there's space to allocate... -+// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? -+static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev) -+{ -+ int reservedChunks; -+ int reservedBlocks = dev->nReservedBlocks; -+ int checkpointBlocks; -+ -+ checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; -+ if(checkpointBlocks < 0) -+ checkpointBlocks = 0; -+ -+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); -+ -+ return (dev->nFreeChunks > reservedChunks); -+} -+ -+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr) -+{ -+ int retVal; -+ yaffs_BlockInfo *bi; -+ -+ if (dev->allocationBlock < 0) { -+ /* Get next block to allocate off */ -+ dev->allocationBlock = yaffs_FindBlockForAllocation(dev); -+ dev->allocationPage = 0; -+ } -+ -+ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) { -+ /* Not enough space to allocate unless we're allowed to use the reserve. */ -+ return -1; -+ } -+ -+ if (dev->nErasedBlocks < dev->nReservedBlocks -+ && dev->allocationPage == 0) { -+ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); -+ } -+ -+ /* Next page please.... */ -+ if (dev->allocationBlock >= 0) { -+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); -+ -+ retVal = (dev->allocationBlock * dev->nChunksPerBlock) + -+ dev->allocationPage; -+ bi->pagesInUse++; -+ yaffs_SetChunkBit(dev, dev->allocationBlock, -+ dev->allocationPage); -+ -+ dev->allocationPage++; -+ -+ dev->nFreeChunks--; -+ -+ /* If the block is full set the state to full */ -+ if (dev->allocationPage >= dev->nChunksPerBlock) { -+ bi->blockState = YAFFS_BLOCK_STATE_FULL; -+ dev->allocationBlock = -1; -+ } -+ -+ if(blockUsedPtr) -+ *blockUsedPtr = bi; -+ -+ return retVal; -+ } -+ -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); -+ -+ return -1; -+} -+ -+static int yaffs_GetErasedChunks(yaffs_Device * dev) -+{ -+ int n; -+ -+ n = dev->nErasedBlocks * dev->nChunksPerBlock; -+ -+ if (dev->allocationBlock > 0) { -+ n += (dev->nChunksPerBlock - dev->allocationPage); -+ } -+ -+ return n; -+ -+} -+ -+static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) -+{ -+ int oldChunk; -+ int newChunk; -+ int chunkInBlock; -+ int markNAND; -+ int retVal = YAFFS_OK; -+ int cleanups = 0; -+ int i; -+ int isCheckpointBlock; -+ int matchingChunk; -+ -+ int chunksBefore = yaffs_GetErasedChunks(dev); -+ int chunksAfter; -+ -+ yaffs_ExtendedTags tags; -+ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); -+ -+ yaffs_Object *object; -+ -+ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); -+ -+ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; -+ -+ T(YAFFS_TRACE_TRACING, -+ (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block, -+ bi->pagesInUse, bi->hasShrinkHeader)); -+ -+ /*yaffs_VerifyFreeChunks(dev); */ -+ -+ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ -+ -+ /* Take off the number of soft deleted entries because -+ * they're going to get really deleted during GC. -+ */ -+ dev->nFreeChunks -= bi->softDeletions; -+ -+ dev->isDoingGC = 1; -+ -+ if (isCheckpointBlock || -+ !yaffs_StillSomeChunkBits(dev, block)) { -+ T(YAFFS_TRACE_TRACING, -+ (TSTR -+ ("Collecting block %d that has no chunks in use" TENDSTR), -+ block)); -+ yaffs_BlockBecameDirty(dev, block); -+ } else { -+ -+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); -+ -+ yaffs_VerifyBlock(dev,bi,block); -+ -+ 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; -+ -+ 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 && !yaffs_SkipVerification(dev)){ -+ if(tags.chunkId == 0) -+ matchingChunk = object->chunkId; -+ else if(object->softDeleted) -+ matchingChunk = oldChunk; /* Defeat the test */ -+ else -+ matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL); -+ -+ if(oldChunk != matchingChunk) -+ T(YAFFS_TRACE_ERROR, -+ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), -+ oldChunk,matchingChunk,tags.objectId, tags.chunkId)); -+ -+ } -+ -+ if (!object) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("page %d in gc has no object: %d %d %d " -+ TENDSTR), oldChunk, -+ tags.objectId, tags.chunkId, tags.byteCount)); -+ } -+ -+ 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. -+ */ -+ -+ 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. -+ * Also, clear out any shadowing stuff -+ */ -+ -+ yaffs_ObjectHeader *oh; -+ oh = (yaffs_ObjectHeader *)buffer; -+ oh->isShrink = 0; -+ oh->shadowsObject = -1; -+ tags.extraShadows = 0; -+ tags.extraIsShrinkHeader = 0; -+ -+ yaffs_VerifyObjectHeader(object,oh,&tags,1); -+ } -+ -+ newChunk = -+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); -+ -+ if (newChunk < 0) { -+ retVal = YAFFS_FAIL; -+ } else { -+ -+ /* Ok, now fix up the Tnodes etc. */ -+ -+ if (tags.chunkId == 0) { -+ /* It's a header */ -+ object->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__); -+ -+ -+ /* Do any required cleanups */ -+ for (i = 0; i < cleanups; i++) { -+ /* Time to delete the file too */ -+ object = -+ yaffs_FindObjectByNumber(dev, -+ dev->gcCleanupList[i]); -+ if (object) { -+ yaffs_FreeTnode(dev, -+ object->variant.fileVariant. -+ top); -+ object->variant.fileVariant.top = NULL; -+ T(YAFFS_TRACE_GC, -+ (TSTR -+ ("yaffs: About to finally delete object %d" -+ TENDSTR), object->objectId)); -+ yaffs_DoGenericObjectDeletion(object); -+ object->myDev->nDeletedFiles--; -+ } -+ -+ } -+ -+ } -+ -+ yaffs_VerifyCollectedBlock(dev,bi,block); -+ -+ if (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; -+ -+ return YAFFS_OK; -+} -+ -+/* New garbage collector -+ * If we're very low on erased blocks then we do aggressive garbage collection -+ * otherwise we do "leasurely" garbage collection. -+ * Aggressive gc looks further (whole array) and will accept less dirty blocks. -+ * Passive gc only inspects smaller areas and will only accept more dirty blocks. -+ * -+ * The idea is to help clear out space in a more spread-out manner. -+ * Dunno if it really does anything useful. -+ */ -+static int yaffs_CheckGarbageCollection(yaffs_Device * dev) -+{ -+ int block; -+ int aggressive; -+ int gcOk = YAFFS_OK; -+ int maxTries = 0; -+ -+ int checkpointBlockAdjust; -+ -+ 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++; -+ -+ checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint); -+ if(checkpointBlockAdjust < 0) -+ checkpointBlockAdjust = 0; -+ -+ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { -+ /* 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 --------------------------------*/ -+ -+static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, -+ int chunkInObject) -+{ -+ return (tags->chunkId == chunkInObject && -+ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; -+ -+} -+ -+ -+/*-------------------- Data file manipulation -----------------*/ -+ -+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 = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); -+ -+ 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 = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); -+ -+ retVal = -+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, -+ chunkInInode); -+ -+ /* Delete the entry in the filestructure (if found) */ -+ if (retVal != -1) { -+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,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->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; -+ -+ for (chunk = 1; chunk <= nChunks; chunk++) { -+ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, -+ chunk); -+ -+ if (tn) { -+ -+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk); -+ -+ if (yaffs_CheckChunkBits -+ (dev, theChunk / dev->nChunksPerBlock, -+ theChunk % dev->nChunksPerBlock)) { -+ -+ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, -+ tags, -+ &chunkDeleted); -+ if (yaffs_TagsMatch -+ (tags, in->objectId, chunk, chunkDeleted)) { -+ /* found it; */ -+ -+ } -+ } else { -+ -+ 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, -+ NULL); -+ if (!tn) { -+ return YAFFS_FAIL; -+ } -+ -+ existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); -+ -+ 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++; -+ } -+ -+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND); -+ -+ return YAFFS_OK; -+} -+ -+static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode, -+ __u8 * buffer) -+{ -+ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); -+ -+ if (chunkInNAND >= 0) { -+ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, -+ buffer,NULL); -+ } else { -+ T(YAFFS_TRACE_NANDACCESS, -+ (TSTR("Chunk %d not found zero instead" TENDSTR), -+ chunkInNAND)); -+ /* get sane (zero) data if you read a hole */ -+ memset(buffer, 0, in->myDev->nDataBytesPerChunk); -+ return 0; -+ } -+ -+} -+ -+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; -+ -+ -+ if(!yaffs_CheckChunkBit(dev,block,page)) -+ T(YAFFS_TRACE_VERIFY, -+ (TSTR("Deleting invalid chunk %d"TENDSTR), -+ chunkId)); -+ -+ bi = yaffs_GetBlockInfo(dev, block); -+ -+ T(YAFFS_TRACE_DELETION, -+ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); -+ -+ if (markNAND && -+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { -+ -+ 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; -+ -+ 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 result = 0; -+ -+ int newChunkId; -+ yaffs_ExtendedTags newTags; -+ yaffs_ExtendedTags oldTags; -+ -+ __u8 *buffer = NULL; -+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; -+ -+ yaffs_ObjectHeader *oh = NULL; -+ -+ yaffs_strcpy(oldName,"silly old name"); -+ -+ if (!in->fake || force) { -+ -+ yaffs_CheckGarbageCollection(dev); -+ yaffs_CheckObjectDetailsLoaded(in); -+ -+ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); -+ oh = (yaffs_ObjectHeader *) buffer; -+ -+ prevChunkId = in->chunkId; -+ -+ if (prevChunkId >= 0) { -+ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, -+ buffer, &oldTags); -+ -+ yaffs_VerifyObjectHeader(in,oh,&oldTags,0); -+ -+ memcpy(oldName, oh->name, sizeof(oh->name)); -+ } -+ -+ memset(buffer, 0xFF, dev->nDataBytesPerChunk); -+ -+ oh->type = in->variantType; -+ oh->yst_mode = in->yst_mode; -+ 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; -+ } -+ -+ if (name && *name) { -+ memset(oh->name, 0, sizeof(oh->name)); -+ yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); -+ } else if (prevChunkId>=0) { -+ memcpy(oh->name, oldName, sizeof(oh->name)); -+ } else { -+ memset(oh->name, 0, sizeof(oh->name)); -+ } -+ -+ 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; -+ -+ yaffs_VerifyObjectHeader(in,oh,&newTags,1); -+ -+ /* 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__); -+ } -+ -+ if(!yaffs_ObjectHasCachedWriteData(in)) -+ in->dirty = 0; -+ -+ /* If this was a shrink, then mark the block that the chunk lives on */ -+ if (isShrink) { -+ bi = yaffs_GetBlockInfo(in->myDev, -+ newChunkId /in->myDev-> nChunksPerBlock); -+ bi->hasShrinkHeader = 1; -+ } -+ -+ } -+ -+ retVal = newChunkId; -+ -+ } -+ -+ if (buffer) -+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); -+ -+ return retVal; -+} -+ -+/*------------------------ Short Operations Cache ---------------------------------------- -+ * In many situations where there is no high level buffering (eg WinCE) a lot of -+ * reads might be short sequential reads, and a lot of writes may be short -+ * sequential writes. eg. scanning/writing a jpeg file. -+ * In these cases, a short read/write cache can provide a huge perfomance benefit -+ * with dumb-as-a-rock code. -+ * In Linux, the page cache provides read buffering aand the short op cache provides write -+ * buffering. -+ * -+ * There are a limited number (~10) of cache chunks per device so that we don't -+ * need a very intelligent search. -+ */ -+ -+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) -+{ -+ yaffs_Device *dev = obj->myDev; -+ int i; -+ yaffs_ChunkCache *cache; -+ int nCaches = obj->myDev->nShortOpCaches; -+ -+ for(i = 0; i < nCaches; i++){ -+ cache = &dev->srCache[i]; -+ if (cache->object == obj && -+ cache->dirty) -+ return 1; -+ } -+ -+ return 0; -+} -+ -+ -+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 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 */ -+ -+ 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))); -+ -+ } -+ } -+ -+} -+ -+/*yaffs_FlushEntireDeviceCache(dev) -+ * -+ * -+ */ -+ -+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) -+{ -+ yaffs_Object *obj; -+ int nCaches = dev->nShortOpCaches; -+ int i; -+ -+ /* Find a dirty object in the cache and flush it... -+ * until there are no further dirty objects. -+ */ -+ do { -+ obj = NULL; -+ for( i = 0; i < nCaches && !obj; i++) { -+ if (dev->srCache[i].object && -+ dev->srCache[i].dirty) -+ obj = dev->srCache[i].object; -+ -+ } -+ if(obj) -+ yaffs_FlushFilesChunkCache(obj); -+ -+ } while(obj); -+ -+} -+ -+ -+/* Grab us a cache 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) -+ 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; -+ } -+ } -+ -+ -+ 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) { -+ /* Flush and try again */ -+ yaffs_FlushFilesChunkCache(theObj); -+ cache = yaffs_GrabChunkCacheWorker(dev); -+ } -+ -+ } -+ 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) { -+ /* Invalidate it. */ -+ for (i = 0; i < dev->nShortOpCaches; i++) { -+ if (dev->srCache[i].object == in) { -+ dev->srCache[i].object = NULL; -+ } -+ } -+ } -+} -+ -+/*--------------------- Checkpointing --------------------*/ -+ -+ -+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head) -+{ -+ yaffs_CheckpointValidity cp; -+ -+ memset(&cp,0,sizeof(cp)); -+ -+ cp.structType = sizeof(cp); -+ cp.magic = YAFFS_MAGIC; -+ cp.version = YAFFS_CHECKPOINT_VERSION; -+ cp.head = (head) ? 1 : 0; -+ -+ return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))? -+ 1 : 0; -+} -+ -+static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) -+{ -+ yaffs_CheckpointValidity cp; -+ int ok; -+ -+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ -+ if(ok) -+ ok = (cp.structType == sizeof(cp)) && -+ (cp.magic == YAFFS_MAGIC) && -+ (cp.version == YAFFS_CHECKPOINT_VERSION) && -+ (cp.head == ((head) ? 1 : 0)); -+ return ok ? 1 : 0; -+} -+ -+static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, -+ yaffs_Device *dev) -+{ -+ cp->nErasedBlocks = dev->nErasedBlocks; -+ cp->allocationBlock = dev->allocationBlock; -+ cp->allocationPage = dev->allocationPage; -+ cp->nFreeChunks = dev->nFreeChunks; -+ -+ cp->nDeletedFiles = dev->nDeletedFiles; -+ cp->nUnlinkedFiles = dev->nUnlinkedFiles; -+ cp->nBackgroundDeletions = dev->nBackgroundDeletions; -+ cp->sequenceNumber = dev->sequenceNumber; -+ cp->oldestDirtySequence = dev->oldestDirtySequence; -+ -+} -+ -+static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, -+ yaffs_CheckpointDevice *cp) -+{ -+ dev->nErasedBlocks = cp->nErasedBlocks; -+ dev->allocationBlock = cp->allocationBlock; -+ dev->allocationPage = cp->allocationPage; -+ dev->nFreeChunks = cp->nFreeChunks; -+ -+ dev->nDeletedFiles = cp->nDeletedFiles; -+ dev->nUnlinkedFiles = cp->nUnlinkedFiles; -+ dev->nBackgroundDeletions = cp->nBackgroundDeletions; -+ dev->sequenceNumber = cp->sequenceNumber; -+ dev->oldestDirtySequence = cp->oldestDirtySequence; -+} -+ -+ -+static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) -+{ -+ yaffs_CheckpointDevice cp; -+ __u32 nBytes; -+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); -+ -+ int ok; -+ -+ /* Write device runtime values*/ -+ yaffs_DeviceToCheckpointDevice(&cp,dev); -+ cp.structType = sizeof(cp); -+ -+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ -+ /* Write block info */ -+ if(ok) { -+ nBytes = nBlocks * sizeof(yaffs_BlockInfo); -+ ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes); -+ } -+ -+ /* Write chunk bits */ -+ if(ok) { -+ nBytes = nBlocks * dev->chunkBitmapStride; -+ ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes); -+ } -+ return ok ? 1 : 0; -+ -+} -+ -+static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) -+{ -+ yaffs_CheckpointDevice cp; -+ __u32 nBytes; -+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); -+ -+ int ok; -+ -+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ if(!ok) -+ return 0; -+ -+ if(cp.structType != sizeof(cp)) -+ return 0; -+ -+ -+ yaffs_CheckpointDeviceToDevice(dev,&cp); -+ -+ nBytes = nBlocks * sizeof(yaffs_BlockInfo); -+ -+ ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes); -+ -+ if(!ok) -+ return 0; -+ nBytes = nBlocks * dev->chunkBitmapStride; -+ -+ ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes); -+ -+ return ok ? 1 : 0; -+} -+ -+static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, -+ yaffs_Object *obj) -+{ -+ -+ cp->objectId = obj->objectId; -+ cp->parentId = (obj->parent) ? obj->parent->objectId : 0; -+ cp->chunkId = obj->chunkId; -+ cp->variantType = obj->variantType; -+ cp->deleted = obj->deleted; -+ cp->softDeleted = obj->softDeleted; -+ cp->unlinked = obj->unlinked; -+ cp->fake = obj->fake; -+ cp->renameAllowed = obj->renameAllowed; -+ cp->unlinkAllowed = obj->unlinkAllowed; -+ cp->serial = obj->serial; -+ cp->nDataChunks = obj->nDataChunks; -+ -+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) -+ cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; -+ else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) -+ cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; -+} -+ -+static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp) -+{ -+ -+ yaffs_Object *parent; -+ -+ obj->objectId = cp->objectId; -+ -+ if(cp->parentId) -+ parent = yaffs_FindOrCreateObjectByNumber( -+ obj->myDev, -+ cp->parentId, -+ YAFFS_OBJECT_TYPE_DIRECTORY); -+ else -+ parent = NULL; -+ -+ if(parent) -+ yaffs_AddObjectToDirectory(parent, obj); -+ -+ obj->chunkId = cp->chunkId; -+ obj->variantType = cp->variantType; -+ obj->deleted = cp->deleted; -+ obj->softDeleted = cp->softDeleted; -+ obj->unlinked = cp->unlinked; -+ obj->fake = cp->fake; -+ obj->renameAllowed = cp->renameAllowed; -+ obj->unlinkAllowed = cp->unlinkAllowed; -+ obj->serial = cp->serial; -+ obj->nDataChunks = cp->nDataChunks; -+ -+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) -+ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; -+ else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) -+ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; -+ -+ if(obj->objectId >= YAFFS_NOBJECT_BUCKETS) -+ obj->lazyLoaded = 1; -+} -+ -+ -+ -+static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn, -+ __u32 level, int chunkOffset) -+{ -+ int i; -+ yaffs_Device *dev = in->myDev; -+ int ok = 1; -+ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; -+ -+ if (tn) { -+ if (level > 0) { -+ -+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ -+ if (tn->internal[i]) { -+ ok = yaffs_CheckpointTnodeWorker(in, -+ tn->internal[i], -+ level - 1, -+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); -+ } -+ } -+ } else if (level == 0) { -+ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; -+ /* printf("write tnode at %d\n",baseOffset); */ -+ ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset)); -+ if(ok) -+ ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes); -+ } -+ } -+ -+ return ok; -+ -+} -+ -+static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) -+{ -+ __u32 endMarker = ~0; -+ int ok = 1; -+ -+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){ -+ ok = yaffs_CheckpointTnodeWorker(obj, -+ obj->variant.fileVariant.top, -+ obj->variant.fileVariant.topLevel, -+ 0); -+ if(ok) -+ ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) == -+ sizeof(endMarker)); -+ } -+ -+ return ok ? 1 : 0; -+} -+ -+static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) -+{ -+ __u32 baseChunk; -+ int ok = 1; -+ yaffs_Device *dev = obj->myDev; -+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; -+ yaffs_Tnode *tn; -+ int nread = 0; -+ -+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); -+ -+ while(ok && (~baseChunk)){ -+ nread++; -+ /* Read level 0 tnode */ -+ -+ -+ /* printf("read tnode at %d\n",baseChunk); */ -+ tn = yaffs_GetTnodeRaw(dev); -+ if(tn) -+ ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) == -+ (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); -+ else -+ ok = 0; -+ -+ if(tn && ok){ -+ ok = yaffs_AddOrFindLevel0Tnode(dev, -+ fileStructPtr, -+ baseChunk, -+ tn) ? 1 : 0; -+ -+ } -+ -+ if(ok) -+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); -+ -+ } -+ -+ T(YAFFS_TRACE_CHECKPOINT,( -+ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), -+ nread,baseChunk,ok)); -+ -+ return ok ? 1 : 0; -+} -+ -+ -+static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) -+{ -+ yaffs_Object *obj; -+ yaffs_CheckpointObject cp; -+ int i; -+ int ok = 1; -+ struct list_head *lh; -+ -+ -+ /* Iterate through the objects in each hash entry, -+ * dumping them to the checkpointing stream. -+ */ -+ -+ for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){ -+ list_for_each(lh, &dev->objectBucket[i].list) { -+ if (lh) { -+ obj = list_entry(lh, yaffs_Object, hashLink); -+ if (!obj->deferedFree) { -+ yaffs_ObjectToCheckpointObject(&cp,obj); -+ cp.structType = sizeof(cp); -+ -+ T(YAFFS_TRACE_CHECKPOINT,( -+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), -+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj)); -+ -+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ -+ if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){ -+ ok = yaffs_WriteCheckpointTnodes(obj); -+ } -+ } -+ } -+ } -+ } -+ -+ /* Dump end of list */ -+ memset(&cp,0xFF,sizeof(yaffs_CheckpointObject)); -+ cp.structType = sizeof(cp); -+ -+ if(ok) -+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ -+ return ok ? 1 : 0; -+} -+ -+static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) -+{ -+ yaffs_Object *obj; -+ yaffs_CheckpointObject cp; -+ int ok = 1; -+ int done = 0; -+ yaffs_Object *hardList = NULL; -+ -+ while(ok && !done) { -+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); -+ if(cp.structType != sizeof(cp)) { -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR), -+ cp.structType,sizeof(cp),ok)); -+ ok = 0; -+ } -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), -+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId)); -+ -+ if(ok && cp.objectId == ~0) -+ done = 1; -+ else if(ok){ -+ obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType); -+ if(obj) { -+ yaffs_CheckpointObjectToObject(obj,&cp); -+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) { -+ ok = yaffs_ReadCheckpointTnodes(obj); -+ } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { -+ obj->hardLinks.next = -+ (struct list_head *) -+ hardList; -+ hardList = obj; -+ } -+ -+ } -+ } -+ } -+ -+ if(ok) -+ yaffs_HardlinkFixup(dev,hardList); -+ -+ return ok ? 1 : 0; -+} -+ -+static int yaffs_WriteCheckpointSum(yaffs_Device *dev) -+{ -+ __u32 checkpointSum; -+ int ok; -+ -+ yaffs_GetCheckpointSum(dev,&checkpointSum); -+ -+ ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum)); -+ -+ if(!ok) -+ return 0; -+ -+ return 1; -+} -+ -+static int yaffs_ReadCheckpointSum(yaffs_Device *dev) -+{ -+ __u32 checkpointSum0; -+ __u32 checkpointSum1; -+ int ok; -+ -+ yaffs_GetCheckpointSum(dev,&checkpointSum0); -+ -+ ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1)); -+ -+ if(!ok) -+ return 0; -+ -+ if(checkpointSum0 != checkpointSum1) -+ return 0; -+ -+ return 1; -+} -+ -+ -+static int yaffs_WriteCheckpointData(yaffs_Device *dev) -+{ -+ -+ int ok = 1; -+ -+ if(dev->skipCheckpointWrite || !dev->isYaffs2){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR))); -+ ok = 0; -+ } -+ -+ if(ok) -+ ok = yaffs_CheckpointOpen(dev,1); -+ -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); -+ ok = yaffs_WriteCheckpointValidityMarker(dev,1); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR))); -+ ok = yaffs_WriteCheckpointDevice(dev); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR))); -+ ok = yaffs_WriteCheckpointObjects(dev); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); -+ ok = yaffs_WriteCheckpointValidityMarker(dev,0); -+ } -+ -+ if(ok){ -+ ok = yaffs_WriteCheckpointSum(dev); -+ } -+ -+ -+ if(!yaffs_CheckpointClose(dev)) -+ ok = 0; -+ -+ if(ok) -+ dev->isCheckpointed = 1; -+ else -+ dev->isCheckpointed = 0; -+ -+ return dev->isCheckpointed; -+} -+ -+static int yaffs_ReadCheckpointData(yaffs_Device *dev) -+{ -+ int ok = 1; -+ -+ if(dev->skipCheckpointRead || !dev->isYaffs2){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR))); -+ ok = 0; -+ } -+ -+ if(ok) -+ ok = yaffs_CheckpointOpen(dev,0); /* open for read */ -+ -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); -+ ok = yaffs_ReadCheckpointValidityMarker(dev,1); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR))); -+ ok = yaffs_ReadCheckpointDevice(dev); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR))); -+ ok = yaffs_ReadCheckpointObjects(dev); -+ } -+ if(ok){ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); -+ ok = yaffs_ReadCheckpointValidityMarker(dev,0); -+ } -+ -+ if(ok){ -+ ok = yaffs_ReadCheckpointSum(dev); -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok)); -+ } -+ -+ if(!yaffs_CheckpointClose(dev)) -+ ok = 0; -+ -+ if(ok) -+ dev->isCheckpointed = 1; -+ else -+ dev->isCheckpointed = 0; -+ -+ return ok ? 1 : 0; -+ -+} -+ -+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) -+{ -+ if(dev->isCheckpointed || -+ dev->blocksInCheckpoint > 0){ -+ dev->isCheckpointed = 0; -+ yaffs_CheckpointInvalidateStream(dev); -+ if(dev->superBlock && dev->markSuperBlockDirty) -+ dev->markSuperBlockDirty(dev->superBlock); -+ } -+} -+ -+ -+int yaffs_CheckpointSave(yaffs_Device *dev) -+{ -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); -+ -+ yaffs_VerifyObjects(dev); -+ yaffs_VerifyBlocks(dev); -+ yaffs_VerifyFreeChunks(dev); -+ -+ if(!dev->isCheckpointed) { -+ yaffs_InvalidateCheckpoint(dev); -+ yaffs_WriteCheckpointData(dev); -+ } -+ -+ T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); -+ -+ return dev->isCheckpointed; -+} -+ -+int yaffs_CheckpointRestore(yaffs_Device *dev) -+{ -+ int retval; -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); -+ -+ retval = yaffs_ReadCheckpointData(dev); -+ -+ if(dev->isCheckpointed){ -+ yaffs_VerifyObjects(dev); -+ yaffs_VerifyBlocks(dev); -+ yaffs_VerifyFreeChunks(dev); -+ } -+ -+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); -+ -+ return retval; -+} -+ -+/*--------------------- 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, loff_t 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->nDataBytesPerChunk + 1; -+ //start = offset % dev->nDataBytesPerChunk; -+ yaffs_AddrToChunk(dev,offset,&chunk,&start); -+ chunk++; -+ -+ /* OK now check for the curveball where the start and end are in -+ * the same chunk. -+ */ -+ if ((start + n) < dev->nDataBytesPerChunk) { -+ nToCopy = n; -+ } else { -+ nToCopy = dev->nDataBytesPerChunk - 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->nDataBytesPerChunk) { -+ 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->nDataBytesPerChunk); -+ -+#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, loff_t 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->nDataBytesPerChunk + 1; -+ //start = offset % dev->nDataBytesPerChunk; -+ yaffs_AddrToChunk(dev,offset,&chunk,&start); -+ chunk++; -+ -+ /* OK now check for the curveball where the start and end are in -+ * the same chunk. -+ */ -+ -+ if ((start + n) < dev->nDataBytesPerChunk) { -+ 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->nDataBytesPerChunk); -+ -+ if (nBytesRead > dev->nDataBytesPerChunk) { -+ nBytesRead = dev->nDataBytesPerChunk; -+ } -+ -+ nToWriteBack = -+ (nBytesRead > -+ (start + n)) ? nBytesRead : (start + n); -+ -+ } else { -+ nToCopy = dev->nDataBytesPerChunk - start; -+ nToWriteBack = dev->nDataBytesPerChunk; -+ } -+ -+ if (nToCopy != dev->nDataBytesPerChunk) { -+ /* 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 the cache */ -+ 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); -+ } -+ else if(cache && -+ !cache->dirty && -+ !yaffs_CheckSpaceForAllocation(in->myDev)){ -+ /* Drop the cache if it was a read cache item and -+ * no space check has been made for it. -+ */ -+ cache = NULL; -+ } -+ -+ 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__); -+ -+ } -+ -+ } 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->nDataBytesPerChunk); -+#ifdef CONFIG_YAFFS_WINCE -+ yfsd_LockYAFFS(TRUE); -+#endif -+ chunkWritten = -+ yaffs_WriteChunkDataToObject(in, chunk, localBuffer, -+ dev->nDataBytesPerChunk, -+ 0); -+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -+#else -+ /* A full chunk. Write directly from the supplied buffer. */ -+ chunkWritten = -+ yaffs_WriteChunkDataToObject(in, chunk, buffer, -+ dev->nDataBytesPerChunk, -+ 0); -+#endif -+ /* Since we've overwritten the cached data, we better invalidate it. */ -+ yaffs_InvalidateChunkCache(in, chunk); -+ } -+ -+ 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; -+} -+ -+ -+/* ---------------------- File resizing stuff ------------------ */ -+ -+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->nDataBytesPerChunk; -+ -+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / -+ dev->nDataBytesPerChunk; -+ 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, loff_t newSize) -+{ -+ -+ int oldFileSize = in->variant.fileVariant.fileSize; -+ int newSizeOfPartialChunk; -+ int newFullChunks; -+ -+ yaffs_Device *dev = in->myDev; -+ -+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); -+ -+ yaffs_FlushFilesChunkCache(in); -+ yaffs_InvalidateWholeChunkCache(in); -+ -+ yaffs_CheckGarbageCollection(dev); -+ -+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { -+ return yaffs_GetFileSize(in); -+ } -+ -+ if (newSize == oldFileSize) { -+ return oldFileSize; -+ } -+ -+ if (newSize < oldFileSize) { -+ -+ yaffs_PruneResizedChunks(in, newSize); -+ -+ if (newSizeOfPartialChunk != 0) { -+ int lastChunk = 1 + newFullChunks; -+ -+ __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 + newSizeOfPartialChunk, 0, -+ dev->nDataBytesPerChunk - newSizeOfPartialChunk); -+ -+ yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, -+ newSizeOfPartialChunk, 1); -+ -+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -+ } -+ -+ in->variant.fileVariant.fileSize = newSize; -+ -+ yaffs_PruneFileStructure(dev, &in->variant.fileVariant); -+ } else { -+ /* newsSize > oldFileSize */ -+ in->variant.fileVariant.fileSize = newSize; -+ } -+ -+ -+ -+ /* Write a new object header. -+ * show we've shrunk the file, if need be -+ * Do this only if the file is not in the deleted directories. -+ */ -+ if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED && -+ in->parent->objectId != YAFFS_OBJECTID_DELETED) { -+ yaffs_UpdateObjectHeader(in, NULL, 0, -+ (newSize < oldFileSize) ? 1 : 0, 0); -+ } -+ -+ return newSize; -+} -+ -+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; -+ } -+} -+ -+ -+ -+int yaffs_FlushFile(yaffs_Object * in, int updateTime) -+{ -+ int retVal; -+ if (in->dirty) { -+ 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,"deleted", 0, 0); -+ -+ } -+ -+ yaffs_RemoveObjectFromDirectory(in); -+ yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__); -+ in->chunkId = -1; -+ -+ 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) -+{ -+ -+ int retVal; -+ int immediateDeletion = 0; -+ -+ if (1) { -+#ifdef __KERNEL__ -+ if (!in->myInode) { -+ immediateDeletion = 1; -+ -+ } -+#else -+ if (in->inUse <= 0) { -+ immediateDeletion = 1; -+ -+ } -+#endif -+ if (immediateDeletion) { -+ retVal = -+ yaffs_ChangeObjectName(in, in->myDev->deletedDir, -+ "deleted", 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, -+ "unlinked", 0, 0); -+ } -+ -+ } -+ return retVal; -+} -+ -+int yaffs_DeleteFile(yaffs_Object * in) -+{ -+ int retVal = YAFFS_OK; -+ -+ if (in->nDataChunks > 0) { -+ /* Use soft deletion if there is data in the file */ -+ 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; -+ } -+ } -+} -+ -+ -+static int yaffs_UnlinkObject( yaffs_Object *obj) -+{ -+ -+ if (obj && obj->unlinkAllowed) { -+ return yaffs_UnlinkWorker(obj); -+ } -+ -+ return YAFFS_FAIL; -+ -+} -+int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) -+{ -+ yaffs_Object *obj; -+ -+ obj = yaffs_FindObjectByName(dir, name); -+ return yaffs_UnlinkObject(obj); -+} -+ -+/*----------------------- Initialisation Scanning ---------------------- */ -+ -+static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId, -+ int backwardScanning) -+{ -+ yaffs_Object *obj; -+ -+ if (!backwardScanning) { -+ /* Handle YAFFS1 forward scanning case -+ * For YAFFS1 we always do the deletion -+ */ -+ -+ } else { -+ /* Handle YAFFS2 case (backward scanning) -+ * If the shadowed object exists then ignore. -+ */ -+ if (yaffs_FindObjectByNumber(dev, objId)) { -+ return; -+ } -+ } -+ -+ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. -+ * We put it in unlinked dir to be cleaned up after the scanning -+ */ -+ obj = -+ yaffs_FindOrCreateObjectByNumber(dev, objId, -+ YAFFS_OBJECT_TYPE_FILE); -+ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); -+ obj->variant.fileVariant.shrinkSize = 0; -+ obj->valid = 1; /* So that we don't read any other info for this file */ -+ -+} -+ -+typedef struct { -+ int seq; -+ int block; -+} yaffs_BlockIndex; -+ -+ -+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) -+{ -+ yaffs_Object *hl; -+ yaffs_Object *in; -+ -+ 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); -+ -+ } -+ -+ } -+ -+} -+ -+ -+ -+ -+ -+static int ybicmp(const void *a, const void *b){ -+ register int aseq = ((yaffs_BlockIndex *)a)->seq; -+ register int bseq = ((yaffs_BlockIndex *)b)->seq; -+ register int ablock = ((yaffs_BlockIndex *)a)->block; -+ register int bblock = ((yaffs_BlockIndex *)b)->block; -+ if( aseq == bseq ) -+ return ablock - bblock; -+ else -+ return aseq - bseq; -+ -+} -+ -+static int yaffs_Scan(yaffs_Device * dev) -+{ -+ yaffs_ExtendedTags tags; -+ int blk; -+ int blockIterator; -+ int startIterator; -+ int endIterator; -+ int nBlocksToScan = 0; -+ int result; -+ -+ int chunk; -+ int c; -+ int deleted; -+ yaffs_BlockState state; -+ yaffs_Object *hardList = NULL; -+ yaffs_BlockInfo *bi; -+ int sequenceNumber; -+ yaffs_ObjectHeader *oh; -+ yaffs_Object *in; -+ yaffs_Object *parent; -+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; -+ -+ int alloc_failed = 0; -+ -+ -+ __u8 *chunkData; -+ -+ yaffs_BlockIndex *blockIndex = NULL; -+ -+ if (dev->isYaffs2) { -+ T(YAFFS_TRACE_SCAN, -+ (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR))); -+ return YAFFS_FAIL; -+ } -+ -+ //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format. -+ -+ 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)); -+ if(!blockIndex) -+ return YAFFS_FAIL; -+ } -+ -+ /* 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; !alloc_failed && 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; !alloc_failed && c < dev->nChunksPerBlock && -+ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { -+ /* Read the tags and decide what to do */ -+ chunk = blk * dev->nChunksPerBlock + c; -+ -+ result = 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). -+ */ -+ -+ if(!in) -+ alloc_failed = 1; -+ -+ if(in){ -+ if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1)) -+ alloc_failed = 1; -+ } -+ -+ endpos = -+ (tags.chunkId - 1) * dev->nDataBytesPerChunk + -+ tags.byteCount; -+ if (in && -+ 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++; -+ -+ result = 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(!in) -+ alloc_failed = 1; -+ -+ if (in && oh->shadowsObject > 0) { -+ yaffs_HandleShadowedObject(dev, -+ oh-> -+ shadowsObject, -+ 0); -+ } -+ -+ if (in && 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 && !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 && !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: -+ in->variant.symLinkVariant.alias = -+ yaffs_CloneString(oh->alias); -+ if(!in->variant.symLinkVariant.alias) -+ alloc_failed = 1; -+ break; -+ } -+ -+ if (parent == dev->deletedDir) { -+ yaffs_DestroyObject(in); -+ bi->hasShrinkHeader = 1; -+ } -+ } -+ } -+ } -+ -+ 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. -+ */ -+ -+ yaffs_HardlinkFixup(dev,hardList); -+ -+ /* 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__); -+ -+ if(alloc_failed){ -+ return YAFFS_FAIL; -+ } -+ -+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); -+ -+ -+ return YAFFS_OK; -+} -+ -+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) -+{ -+ __u8 *chunkData; -+ yaffs_ObjectHeader *oh; -+ yaffs_Device *dev = in->myDev; -+ yaffs_ExtendedTags tags; -+ int result; -+ int alloc_failed = 0; -+ -+ if(!in) -+ return; -+ -+#if 0 -+ T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR), -+ in->objectId, -+ in->lazyLoaded ? "not yet" : "already")); -+#endif -+ -+ if(in->lazyLoaded){ -+ in->lazyLoaded = 0; -+ chunkData = yaffs_GetTempBuffer(dev, __LINE__); -+ -+ result = yaffs_ReadChunkWithTagsFromNAND(dev,in->chunkId,chunkData,&tags); -+ oh = (yaffs_ObjectHeader *) chunkData; -+ -+ 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 -+ yaffs_SetObjectName(in, oh->name); -+ -+ if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ -+ in->variant.symLinkVariant.alias = -+ yaffs_CloneString(oh->alias); -+ if(!in->variant.symLinkVariant.alias) -+ alloc_failed = 1; /* Not returned to caller */ -+ } -+ -+ yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__); -+ } -+} -+ -+static int yaffs_ScanBackwards(yaffs_Device * dev) -+{ -+ yaffs_ExtendedTags tags; -+ int blk; -+ int blockIterator; -+ int startIterator; -+ int endIterator; -+ int nBlocksToScan = 0; -+ -+ int chunk; -+ int result; -+ int c; -+ int deleted; -+ yaffs_BlockState state; -+ yaffs_Object *hardList = NULL; -+ yaffs_BlockInfo *bi; -+ int sequenceNumber; -+ yaffs_ObjectHeader *oh; -+ yaffs_Object *in; -+ yaffs_Object *parent; -+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; -+ int itsUnlinked; -+ __u8 *chunkData; -+ -+ int fileSize; -+ int isShrink; -+ int foundChunksInBlock; -+ int equivalentObjectId; -+ int alloc_failed = 0; -+ -+ -+ yaffs_BlockIndex *blockIndex = NULL; -+ int altBlockIndex = 0; -+ -+ 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)); -+ -+ -+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; -+ -+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); -+ -+ if(!blockIndex) { -+ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); -+ altBlockIndex = 1; -+ } -+ -+ if(!blockIndex) { -+ T(YAFFS_TRACE_SCAN, -+ (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); -+ return YAFFS_FAIL; -+ } -+ -+ dev->blocksInCheckpoint = 0; -+ -+ chunkData = yaffs_GetTempBuffer(dev, __LINE__); -+ -+ /* 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; -+ -+ if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) -+ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; -+ -+ T(YAFFS_TRACE_SCAN_DEBUG, -+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, -+ state, sequenceNumber)); -+ -+ -+ if(state == YAFFS_BLOCK_STATE_CHECKPOINT){ -+ dev->blocksInCheckpoint++; -+ -+ } else 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)); -+ -+ } -+ } -+ } -+ -+ T(YAFFS_TRACE_SCAN, -+ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); -+ -+ -+ -+ YYIELD(); -+ -+ /* Sort the blocks */ -+#ifndef CONFIG_YAFFS_USE_OWN_SORT -+ yaffs_qsort(blockIndex, nBlocksToScan, -+ sizeof(yaffs_BlockIndex), ybicmp); -+#else -+ { -+ /* Dungy old bubble sort... */ -+ -+ 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; -+ } -+ } -+#endif -+ -+ YYIELD(); -+ -+ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); -+ -+ /* 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; !alloc_failed && blockIterator >= startIterator; -+ blockIterator--) { -+ /* Cooperative multitasking! This loop can run for so -+ long that watchdog timers expire. */ -+ YYIELD(); -+ -+ /* get the block to scan in the correct order */ -+ blk = blockIndex[blockIterator].block; -+ -+ bi = yaffs_GetBlockInfo(dev, blk); -+ -+ -+ state = bi->blockState; -+ -+ deleted = 0; -+ -+ /* For each chunk in each block that needs scanning.... */ -+ foundChunksInBlock = 0; -+ for (c = dev->nChunksPerBlock - 1; -+ !alloc_failed && c >= 0 && -+ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || -+ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { -+ /* Scan backwards... -+ * Read the tags and decide what to do -+ */ -+ -+ chunk = blk * dev->nChunksPerBlock + c; -+ -+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, -+ &tags); -+ -+ /* Let's have a good look at this chunk... */ -+ -+ if (!tags.chunkUsed) { -+ /* An unassigned chunk in the block. -+ * If there are used chunks after this one, then -+ * it is a chunk that was skipped due to failing the erased -+ * check. Just skip it so that it can be deleted. -+ * But, more typically, We get here when this is an unallocated -+ * chunk and his means that either the block is empty or -+ * this is the one being allocated from -+ */ -+ -+ if(foundChunksInBlock) -+ { -+ /* This is a chunk that was skipped due to failing the erased check */ -+ -+ } else 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 { -+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || -+ state == YAFFS_BLOCK_STATE_ALLOCATING) { -+ if(dev->sequenceNumber == bi->sequenceNumber) { -+ /* 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; -+ } -+ else { -+ /* This is a partially written block that is not -+ * the current allocation block. This block must have -+ * had a write failure, so set up for retirement. -+ */ -+ -+ bi->needsRetiring = 1; -+ bi->gcPrioritise = 1; -+ -+ T(YAFFS_TRACE_ALWAYS, -+ (TSTR("Partially written block %d being set for retirement" TENDSTR), -+ blk)); -+ } -+ -+ } -+ -+ } -+ -+ dev->nFreeChunks++; -+ -+ } else if (tags.chunkId > 0) { -+ /* chunkId > 0 so it is a data chunk... */ -+ unsigned int endpos; -+ __u32 chunkBase = -+ (tags.chunkId - 1) * dev->nDataBytesPerChunk; -+ -+ foundChunksInBlock = 1; -+ -+ -+ yaffs_SetChunkBit(dev, blk, c); -+ bi->pagesInUse++; -+ -+ in = yaffs_FindOrCreateObjectByNumber(dev, -+ tags. -+ objectId, -+ YAFFS_OBJECT_TYPE_FILE); -+ if(!in){ -+ /* Out of memory */ -+ alloc_failed = 1; -+ } -+ -+ if (in && -+ in->variantType == YAFFS_OBJECT_TYPE_FILE -+ && chunkBase < -+ in->variant.fileVariant.shrinkSize) { -+ /* This has not been invalidated by a resize */ -+ if(!yaffs_PutChunkIntoFile(in, tags.chunkId, -+ chunk, -1)){ -+ alloc_failed = 1; -+ } -+ -+ /* File size is calculated by looking at the data chunks if we have not -+ * seen an object header yet. Stop this practice once we find an object header. -+ */ -+ endpos = -+ (tags.chunkId - -+ 1) * dev->nDataBytesPerChunk + -+ 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 if(in) { -+ /* This chunk has been invalidated by a resize, so delete */ -+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__); -+ -+ } -+ } else { -+ /* chunkId == 0, so it is an ObjectHeader. -+ * Thus, we read in the object header and make the object -+ */ -+ foundChunksInBlock = 1; -+ -+ yaffs_SetChunkBit(dev, blk, c); -+ bi->pagesInUse++; -+ -+ oh = NULL; -+ in = NULL; -+ -+ if (tags.extraHeaderInfoAvailable) { -+ in = yaffs_FindOrCreateObjectByNumber -+ (dev, tags.objectId, -+ tags.extraObjectType); -+ } -+ -+ if (!in || -+#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD -+ !in->valid || -+#endif -+ tags.extraShadows || -+ (!in->valid && -+ (tags.objectId == YAFFS_OBJECTID_ROOT || -+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) -+ ) { -+ -+ /* 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. -+ */ -+ -+ result = 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; -+ -+ if(oh) { -+ 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 -+ } else { -+ in->variantType = tags.extraObjectType; -+ in->lazyLoaded = 1; -+ } -+ -+ in->chunkId = chunk; -+ -+ } else if (!in->valid) { -+ /* we need to load this info */ -+ -+ in->valid = 1; -+ in->chunkId = chunk; -+ -+ if(oh) { -+ 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 -+ -+ if (oh->shadowsObject > 0) -+ yaffs_HandleShadowedObject(dev, -+ oh-> -+ shadowsObject, -+ 1); -+ -+ -+ yaffs_SetObjectName(in, oh->name); -+ parent = -+ yaffs_FindOrCreateObjectByNumber -+ (dev, oh->parentObjectId, -+ YAFFS_OBJECT_TYPE_DIRECTORY); -+ -+ fileSize = oh->fileSize; -+ isShrink = oh->isShrink; -+ equivalentObjectId = oh->equivalentObjectId; -+ -+ } -+ else { -+ in->variantType = tags.extraObjectType; -+ parent = -+ yaffs_FindOrCreateObjectByNumber -+ (dev, tags.extraParentObjectId, -+ YAFFS_OBJECT_TYPE_DIRECTORY); -+ fileSize = tags.extraFileLength; -+ isShrink = tags.extraIsShrinkHeader; -+ equivalentObjectId = tags.extraEquivalentObjectId; -+ in->lazyLoaded = 1; -+ -+ } -+ in->dirty = 0; -+ -+ /* directory stuff... -+ * hook up to parent -+ */ -+ -+ 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); -+ -+ itsUnlinked = (parent == dev->deletedDir) || -+ (parent == dev->unlinkedDir); -+ -+ if (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 < fileSize) { -+ /* This covers the case where the file size is greater -+ * than where the data is -+ * This will happen if the file is resized to be larger -+ * than its current data extents. -+ */ -+ in->variant.fileVariant.fileSize = fileSize; -+ in->variant.fileVariant.scannedFileSize = -+ in->variant.fileVariant.fileSize; -+ } -+ -+ if (isShrink && -+ in->variant.fileVariant.shrinkSize > fileSize) { -+ in->variant.fileVariant.shrinkSize = fileSize; -+ } -+ -+ break; -+ case YAFFS_OBJECT_TYPE_HARDLINK: -+ if(!itsUnlinked) { -+ in->variant.hardLinkVariant.equivalentObjectId = -+ 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: -+ if(oh){ -+ in->variant.symLinkVariant.alias = -+ yaffs_CloneString(oh-> -+ alias); -+ if(!in->variant.symLinkVariant.alias) -+ alloc_failed = 1; -+ } -+ break; -+ } -+ -+ } -+ -+ } -+ -+ } /* End of scanning for each chunk */ -+ -+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { -+ /* If we got this far while scanning, then the block is fully allocated. */ -+ 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 (altBlockIndex) -+ YFREE_ALT(blockIndex); -+ else -+ 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. -+ */ -+ yaffs_HardlinkFixup(dev,hardList); -+ -+ -+ /* -+ * Sort out state of unlinked and deleted objects. -+ */ -+ { -+ 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__); -+ -+ if(alloc_failed){ -+ return YAFFS_FAIL; -+ } -+ -+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); -+ -+ return YAFFS_OK; -+} -+ -+/*------------------------------ Directory Functions ----------------------------- */ -+ -+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj) -+{ -+ yaffs_Device *dev = obj->myDev; -+ -+ if(dev && dev->removeObjectCallback) -+ dev->removeObjectCallback(obj); -+ -+ list_del_init(&obj->siblings); -+ obj->parent = NULL; -+} -+ -+ -+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 */ -+ yaffs_RemoveObjectFromDirectory(obj); -+ } -+ /* 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; -+ } -+} -+ -+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); -+ -+ yaffs_CheckObjectDetailsLoaded(l); -+ -+ /* 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_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) { -+ return l; -+ } -+ -+ } -+ } -+ } -+ -+ return NULL; -+} -+ -+ -+#if 0 -+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; -+ -+} -+#endif -+ -+/* 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; -+ yaffs_CheckObjectDetailsLoaded(obj); -+ } -+ return obj; -+ -+} -+ -+int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) -+{ -+ memset(name, 0, buffSize * sizeof(YCHAR)); -+ -+ yaffs_CheckObjectDetailsLoaded(obj); -+ -+ 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 { -+ int result; -+ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); -+ -+ yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; -+ -+ memset(buffer, 0, obj->myDev->nDataBytesPerChunk); -+ -+ if (obj->chunkId >= 0) { -+ result = 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->nDataBytesPerChunk; -+ } -+} -+ -+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 -+ -+#if 0 -+int yaffs_DumpObject(yaffs_Object * obj) -+{ -+ YCHAR name[257]; -+ -+ 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))); -+ -+ return YAFFS_OK; -+} -+#endif -+ -+/*---------------------------- 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 */ -+} -+ -+ -+static int yaffs_CreateInitialDirectories(yaffs_Device *dev) -+{ -+ /* Initialise the unlinked, deleted, root and lost and found directories */ -+ -+ dev->lostNFoundDir = dev->rootDir = NULL; -+ 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); -+ -+ if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){ -+ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); -+ return YAFFS_OK; -+ } -+ -+ return YAFFS_FAIL; -+} -+ -+int yaffs_GutsInitialise(yaffs_Device * dev) -+{ -+ int init_failed = 0; -+ unsigned x; -+ int bits; -+ -+ T(YAFFS_TRACE_TRACING, (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->nDataBytesPerChunk < 1024) || -+ (!dev->isYaffs2 && dev->nDataBytesPerChunk != 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->nDataBytesPerChunk, 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; -+ -+ -+ -+ /* OK now calculate a few things for the device */ -+ -+ /* -+ * Calculate all the chunk size manipulation numbers: -+ */ -+ /* Start off assuming it is a power of 2 */ -+ dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk); -+ dev->chunkMask = (1<<dev->chunkShift) - 1; -+ -+ if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){ -+ /* Yes it is a power of 2, disable crumbs */ -+ dev->crumbMask = 0; -+ dev->crumbShift = 0; -+ dev->crumbsPerChunk = 0; -+ } else { -+ /* Not a power of 2, use crumbs instead */ -+ dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart)); -+ dev->crumbMask = (1<<dev->crumbShift)-1; -+ dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift); -+ dev->chunkShift = 0; -+ dev->chunkMask = 0; -+ } -+ -+ -+ /* -+ * Calculate chunkGroupBits. -+ * We need to find the next power of 2 > than internalEndBlock -+ */ -+ -+ x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); -+ -+ bits = ShiftsGE(x); -+ -+ /* Set up tnode width if wide tnodes are enabled. */ -+ if(!dev->wideTnodesDisabled){ -+ /* bits must be even so that we end up with 32-bit words */ -+ if(bits & 1) -+ bits++; -+ if(bits < 16) -+ dev->tnodeWidth = 16; -+ else -+ dev->tnodeWidth = bits; -+ } -+ else -+ dev->tnodeWidth = 16; -+ -+ dev->tnodeMask = (1<<dev->tnodeWidth)-1; -+ -+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), -+ * 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 <= dev->tnodeWidth) -+ dev->chunkGroupBits = 0; -+ else -+ dev->chunkGroupBits = bits - dev->tnodeWidth; -+ -+ -+ 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->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ -+ -+ /* Initialise temporary buffers and caches. */ -+ if(!yaffs_InitialiseTempBuffers(dev)) -+ init_failed = 1; -+ -+ dev->srCache = NULL; -+ dev->gcCleanupList = NULL; -+ -+ -+ if (!init_failed && -+ dev->nShortOpCaches > 0) { -+ int i; -+ __u8 *buf; -+ int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); -+ -+ if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) { -+ dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; -+ } -+ -+ buf = dev->srCache = YMALLOC(srCacheBytes); -+ -+ if(dev->srCache) -+ memset(dev->srCache,0,srCacheBytes); -+ -+ for (i = 0; i < dev->nShortOpCaches && buf; i++) { -+ dev->srCache[i].object = NULL; -+ dev->srCache[i].lastUse = 0; -+ dev->srCache[i].dirty = 0; -+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk); -+ } -+ if(!buf) -+ init_failed = 1; -+ -+ dev->srLastUse = 0; -+ } -+ -+ dev->cacheHits = 0; -+ -+ if(!init_failed){ -+ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); -+ if(!dev->gcCleanupList) -+ init_failed = 1; -+ } -+ -+ if (dev->isYaffs2) { -+ dev->useHeaderFileSize = 1; -+ } -+ if(!init_failed && !yaffs_InitialiseBlocks(dev)) -+ init_failed = 1; -+ -+ yaffs_InitialiseTnodes(dev); -+ yaffs_InitialiseObjects(dev); -+ -+ if(!init_failed && !yaffs_CreateInitialDirectories(dev)) -+ init_failed = 1; -+ -+ -+ if(!init_failed){ -+ /* Now scan the flash. */ -+ if (dev->isYaffs2) { -+ if(yaffs_CheckpointRestore(dev)) { -+ T(YAFFS_TRACE_ALWAYS, -+ (TSTR("yaffs: restored from checkpoint" TENDSTR))); -+ } else { -+ -+ /* Clean up the mess caused by an aborted checkpoint load -+ * and scan backwards. -+ */ -+ yaffs_DeinitialiseBlocks(dev); -+ yaffs_DeinitialiseTnodes(dev); -+ yaffs_DeinitialiseObjects(dev); -+ -+ -+ dev->nErasedBlocks = 0; -+ dev->nFreeChunks = 0; -+ dev->allocationBlock = -1; -+ dev->allocationPage = -1; -+ dev->nDeletedFiles = 0; -+ dev->nUnlinkedFiles = 0; -+ dev->nBackgroundDeletions = 0; -+ dev->oldestDirtySequence = 0; -+ -+ if(!init_failed && !yaffs_InitialiseBlocks(dev)) -+ init_failed = 1; -+ -+ yaffs_InitialiseTnodes(dev); -+ yaffs_InitialiseObjects(dev); -+ -+ if(!init_failed && !yaffs_CreateInitialDirectories(dev)) -+ init_failed = 1; -+ -+ if(!init_failed && !yaffs_ScanBackwards(dev)) -+ init_failed = 1; -+ } -+ }else -+ if(!yaffs_Scan(dev)) -+ init_failed = 1; -+ } -+ -+ if(init_failed){ -+ /* Clean up the mess */ -+ T(YAFFS_TRACE_TRACING, -+ (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); -+ -+ yaffs_Deinitialise(dev); -+ return YAFFS_FAIL; -+ } -+ -+ /* Zero out stats */ -+ dev->nPageReads = 0; -+ dev->nPageWrites = 0; -+ dev->nBlockErasures = 0; -+ dev->nGCCopies = 0; -+ dev->nRetriedWrites = 0; -+ -+ dev->nRetiredBlocks = 0; -+ -+ yaffs_VerifyFreeChunks(dev); -+ yaffs_VerifyBlocks(dev); -+ -+ -+ T(YAFFS_TRACE_TRACING, -+ (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 && -+ dev->srCache) { -+ -+ for (i = 0; i < dev->nShortOpCaches; i++) { -+ if(dev->srCache[i].data) -+ YFREE(dev->srCache[i].data); -+ dev->srCache[i].data = NULL; -+ } -+ -+ YFREE(dev->srCache); -+ dev->srCache = NULL; -+ } -+ -+ YFREE(dev->gcCleanupList); -+ -+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { -+ YFREE(dev->tempBuffer[i].buffer); -+ } -+ -+ dev->isMounted = 0; -+ } -+ -+} -+ -+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; -+ int blocksForCheckpoint; -+ -+#if 1 -+ nFree = dev->nFreeChunks; -+#else -+ nFree = yaffs_CountFreeChunks(dev); -+#endif -+ -+ nFree += dev->nDeletedFiles; -+ -+ /* 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); -+ -+ /* Now we figure out how much to reserve for the checkpoint and report that... */ -+ blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; -+ if(blocksForCheckpoint < 0) -+ blocksForCheckpoint = 0; -+ -+ nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); -+ -+ if (nFree < 0) -+ nFree = 0; -+ -+ return nFree; -+ -+} -+ -+static int yaffs_freeVerificationFailures; -+ -+static void yaffs_VerifyFreeChunks(yaffs_Device * dev) -+{ -+ int counted; -+ int difference; -+ -+ if(yaffs_SkipVerification(dev)) -+ return; -+ -+ counted = yaffs_CountFreeChunks(dev); -+ -+ 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; -+} -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_guts.h linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_guts.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_guts.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,902 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_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 -+ -+#define YAFFS_CHECKPOINT_VERSION 3 -+ -+#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 -+ -+/* Some special object ids for pseudo objects */ -+#define YAFFS_OBJECTID_ROOT 1 -+#define YAFFS_OBJECTID_LOSTNFOUND 2 -+#define YAFFS_OBJECTID_UNLINKED 3 -+#define YAFFS_OBJECTID_DELETED 4 -+ -+/* Sseudo object ids for checkpointing */ -+#define YAFFS_OBJECTID_SB_HEADER 0x10 -+#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 -+#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 -+ -+/* */ -+ -+#define YAFFS_MAX_SHORT_OP_CACHES 20 -+ -+#define YAFFS_N_TEMP_BUFFERS 4 -+ -+/* We limit the number attempts at sucessfully saving a chunk of data. -+ * Small-page devices have 32 pages per block; large-page devices have 64. -+ * Default to something in the order of 5 to 10 blocks worth of chunks. -+ */ -+#define YAFFS_WR_ATTEMPTS (5*64) -+ -+/* Sequence numbers are used in YAFFS2 to determine block allocation order. -+ * The range is limited slightly to help distinguish bad numbers from good. -+ * This also allows us to perhaps in the future use special numbers for -+ * 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; -+ -+ -+ -+/* Tags structures in RAM -+ * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise -+ * the structure size will get blown out. -+ */ -+ -+#ifndef CONFIG_YAFFS_NO_YAFFS1 -+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 -+ -+/* Stuff used for extended tags in YAFFS2 */ -+ -+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; -+ -+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL -+ -+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; -+ unsigned blockBad; -+ -+ /* 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; -+ -+/* Spare structure for YAFFS1 */ -+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; -+}; -+ -+/* 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. -+ * At least one page holds valid data. -+ * 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. -+ */ -+ -+ YAFFS_BLOCK_STATE_DIRTY, -+ /* All pages have been allocated and deleted. -+ * Erase me, reuse me. -+ */ -+ -+ YAFFS_BLOCK_STATE_CHECKPOINT, -+ /* This block is assigned to holding checkpoint data. -+ */ -+ -+ 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; -+ -+#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) -+ -+ -+typedef struct { -+ -+ int softDeletions:10; /* number of soft deleted pages */ -+ int pagesInUse:10; /* 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. */ -+ __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */ -+ __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block. -+ It should be prioritised for GC */ -+ __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ -+ -+#ifdef CONFIG_YAFFS_YAFFS2 -+ __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */ -+ __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. No longer used */ -+ 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; -+ __u32 yst_gid; -+ __u32 yst_atime; -+ __u32 yst_mtime; -+ __u32 yst_ctime; -+#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 (major/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 > 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 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 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */ -+ -+ __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is -+ * still in the inode cache. Free of object is defered. -+ * until the inode is released. -+ */ -+ -+ __u8 serial; /* serial number of chunk in NAND. Cached here */ -+ __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 */ -+ -+ /* directory structure stuff */ -+ /* also used for linking up the free list */ -+ struct yaffs_ObjectStruct *parent; -+ struct list_head siblings; -+ -+ /* Where's my object header in NAND? */ -+ int chunkId; -+ -+ int nDataChunks; /* Number of data chunks attached to the file. */ -+ -+ __u32 objectId; /* the object id value */ -+ -+ __u32 yst_mode; -+ -+#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; -+ __u32 yst_gid; -+ __u32 yst_atime; -+ __u32 yst_mtime; -+ __u32 yst_ctime; -+#endif -+ -+ __u32 yst_rdev; -+ -+#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; -+ -+ -+/* yaffs_CheckpointObject holds the definition of an object as dumped -+ * by checkpointing. -+ */ -+ -+typedef struct { -+ int structType; -+ __u32 objectId; -+ __u32 parentId; -+ int chunkId; -+ -+ yaffs_ObjectType variantType:3; -+ __u8 deleted:1; -+ __u8 softDeleted:1; -+ __u8 unlinked:1; -+ __u8 fake:1; -+ __u8 renameAllowed:1; -+ __u8 unlinkAllowed:1; -+ __u8 serial; -+ -+ int nDataChunks; -+ __u32 fileSizeOrEquivalentObjectId; -+ -+}yaffs_CheckpointObject; -+ -+/*--------------------- 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 nDataBytesPerChunk; /* 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. */ -+ -+ -+ /* Stuff used by the shared space checkpointing mechanism */ -+ /* If this value is zero, then this mechanism is disabled */ -+ -+ int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */ -+ -+ -+ -+ -+ 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. -+ */ -+ void *superBlock; -+ -+ /* 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; -+ -+ /* The removeObjectCallback function must be supplied by OS flavours that -+ * need it. The Linux kernel does not use this, but yaffs direct does use -+ * it to implement the faster readdir -+ */ -+ void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj); -+ -+ /* Callback to mark the superblock dirsty */ -+ void (*markSuperBlockDirty)(void * superblock); -+ -+ int wideTnodesDisabled; /* Set to disable wide tnodes */ -+ -+ -+ /* End of stuff that must be set before initialisation. */ -+ -+ /* Checkpoint control. Can be set before or after initialisation */ -+ __u8 skipCheckpointRead; -+ __u8 skipCheckpointWrite; -+ -+ /* Runtime parameters. Set up by YAFFS. */ -+ -+ __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */ -+ __u16 chunkGroupSize; /* == 2^^chunkGroupBits */ -+ -+ /* Stuff to support wide tnodes */ -+ __u32 tnodeWidth; -+ __u32 tnodeMask; -+ -+ /* Stuff to support various file offses to chunk/offset translations */ -+ /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */ -+ __u32 crumbMask; -+ __u32 crumbShift; -+ __u32 crumbsPerChunk; -+ -+ /* Straight shifting for nDataBytesPerChunk being a power of 2 */ -+ __u32 chunkShift; -+ __u32 chunkMask; -+ -+ -+#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; -+ -+ int isCheckpointed; -+ -+ -+ /* Stuff to support block offsetting to support start block zero */ -+ int internalStartBlock; -+ int internalEndBlock; -+ int blockOffset; -+ int chunkOffset; -+ -+ -+ /* Runtime checkpointing stuff */ -+ int checkpointPageSequence; /* running sequence number of checkpoint pages */ -+ int checkpointByteCount; -+ int checkpointByteOffset; -+ __u8 *checkpointBuffer; -+ int checkpointOpenForWrite; -+ int blocksInCheckpoint; -+ int checkpointCurrentChunk; -+ int checkpointCurrentBlock; -+ int checkpointNextBlock; -+ int *checkpointBlockList; -+ int checkpointMaxBlocks; -+ __u32 checkpointSum; -+ __u32 checkpointXor; -+ -+ /* Block Info */ -+ yaffs_BlockInfo *blockInfo; -+ __u8 *chunkBits; /* bitmap of chunks in use */ -+ unsigned blockInfoAlt:1; /* was allocated using alternative strategy */ -+ unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */ -+ 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. */ -+ int nonAggressiveSkip; /* GC state/mode */ -+ -+ /* Statistcs */ -+ 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; -+ -+ int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */ -+ -+ /* Special directories */ -+ yaffs_Object *rootDir; -+ yaffs_Object *lostNFoundDir; -+ -+ /* Buffer areas for storing data to recover from write failures TODO -+ * __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. */ -+ -+ -+ 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; -+ -+/* The static layout of bllock usage etc is stored in the super block header */ -+typedef struct { -+ int StructType; -+ int version; -+ int checkpointStartBlock; -+ int checkpointEndBlock; -+ int startBlock; -+ int endBlock; -+ int rfu[100]; -+} yaffs_SuperBlockHeader; -+ -+/* The CheckpointDevice structure holds the device information that changes at runtime and -+ * must be preserved over unmount/mount cycles. -+ */ -+typedef struct { -+ int structType; -+ int nErasedBlocks; -+ int allocationBlock; /* Current block being allocated off */ -+ __u32 allocationPage; -+ int nFreeChunks; -+ -+ int nDeletedFiles; /* Count of files awaiting deletion;*/ -+ int nUnlinkedFiles; /* Count of unlinked files. */ -+ int nBackgroundDeletions; /* Count of background deletions. */ -+ -+ /* yaffs2 runtime stuff */ -+ unsigned sequenceNumber; /* Sequence number of currently allocating block */ -+ unsigned oldestDirtySequence; -+ -+} yaffs_CheckpointDevice; -+ -+ -+typedef struct { -+ int structType; -+ __u32 magic; -+ __u32 version; -+ __u32 head; -+} yaffs_CheckpointValidity; -+ -+/* 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); -+ -+int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, -+ yaffs_Object * newDir, const YCHAR * newName); -+ -+int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name); -+int yaffs_DeleteFile(yaffs_Object * obj); -+ -+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); -+ -+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, loff_t offset, -+ int nBytes); -+int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset, -+ int nBytes, int writeThrough); -+int yaffs_ResizeFile(yaffs_Object * obj, loff_t 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); -+ -+/* Flushing and checkpointing */ -+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev); -+ -+int yaffs_CheckpointSave(yaffs_Device *dev); -+int yaffs_CheckpointRestore(yaffs_Device *dev); -+ -+/* 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); -+ -+/* A few useful functions */ -+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); -+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,241 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+const char *yaffs_mtdif_c_version = -+ "$Id: yaffs_mtdif.c,v 1.19 2007-02-14 01:09:06 wookey Exp $"; -+ -+#include "yportenv.h" -+ -+ -+#include "yaffs_mtdif.h" -+ -+#include "linux/mtd/mtd.h" -+#include "linux/types.h" -+#include "linux/time.h" -+#include "linux/mtd/nand.h" -+ -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) -+static struct nand_oobinfo yaffs_oobinfo = { -+ .useecc = 1, -+ .eccbytes = 6, -+ .eccpos = {8, 9, 10, 13, 14, 15} -+}; -+ -+static struct nand_oobinfo yaffs_noeccinfo = { -+ .useecc = 0, -+}; -+#endif -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob) -+{ -+ oob[0] = spare->tagByte0; -+ oob[1] = spare->tagByte1; -+ oob[2] = spare->tagByte2; -+ oob[3] = spare->tagByte3; -+ oob[4] = spare->tagByte4; -+ oob[5] = spare->tagByte5 & 0x3f; -+ oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80; -+ oob[5] |= spare->pageStatus == 0 ? 0: 0x40; -+ oob[6] = spare->tagByte6; -+ oob[7] = spare->tagByte7; -+} -+ -+static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob) -+{ -+ struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare; -+ spare->tagByte0 = oob[0]; -+ spare->tagByte1 = oob[1]; -+ spare->tagByte2 = oob[2]; -+ spare->tagByte3 = oob[3]; -+ spare->tagByte4 = oob[4]; -+ spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; -+ spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y'; -+ spare->pageStatus = oob[5] & 0x40 ? 0xff : 0; -+ spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; -+ spare->tagByte6 = oob[6]; -+ spare->tagByte7 = oob[7]; -+ spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; -+ -+ nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ -+} -+#endif -+ -+int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, const yaffs_Spare * spare) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ struct mtd_oob_ops ops; -+#endif -+ size_t dummy; -+ int retval = 0; -+ -+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ __u8 spareAsBytes[8]; /* OOB */ -+ -+ if (data && !spare) -+ retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data); -+ else if (spare) { -+ if (dev->useNANDECC) { -+ translate_spare2oob(spare, spareAsBytes); -+ ops.mode = MTD_OOB_AUTO; -+ ops.ooblen = 8; /* temp hack */ -+ } else { -+ ops.mode = MTD_OOB_RAW; -+ ops.ooblen = YAFFS_BYTES_PER_SPARE; -+ } -+ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; -+ ops.datbuf = (u8 *)data; -+ ops.ooboffs = 0; -+ ops.oobbuf = spareAsBytes; -+ retval = mtd->write_oob(mtd, addr, &ops); -+ } -+#else -+ __u8 *spareAsBytes = (__u8 *) spare; -+ -+ if (data && spare) { -+ if (dev->useNANDECC) -+ retval = -+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, spareAsBytes, -+ &yaffs_oobinfo); -+ else -+ retval = -+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, spareAsBytes, -+ &yaffs_noeccinfo); -+ } else { -+ if (data) -+ retval = -+ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, -+ data); -+ if (spare) -+ retval = -+ mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, -+ &dummy, spareAsBytes); -+ } -+#endif -+ -+ 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); -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ struct mtd_oob_ops ops; -+#endif -+ size_t dummy; -+ int retval = 0; -+ -+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ __u8 spareAsBytes[8]; /* OOB */ -+ -+ if (data && !spare) -+ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data); -+ else if (spare) { -+ if (dev->useNANDECC) { -+ ops.mode = MTD_OOB_AUTO; -+ ops.ooblen = 8; /* temp hack */ -+ } else { -+ ops.mode = MTD_OOB_RAW; -+ ops.ooblen = YAFFS_BYTES_PER_SPARE; -+ } -+ ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; -+ ops.datbuf = data; -+ ops.ooboffs = 0; -+ ops.oobbuf = spareAsBytes; -+ retval = mtd->read_oob(mtd, addr, &ops); -+ if (dev->useNANDECC) -+ translate_oob2spare(spare, spareAsBytes); -+ } -+#else -+ __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->nDataBytesPerChunk, -+ &dummy, data, spareAsBytes, -+ &yaffs_oobinfo); -+ } else { -+ retval = -+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, spareAsBytes, -+ &yaffs_noeccinfo); -+ } -+ } else { -+ if (data) -+ retval = -+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, -+ data); -+ if (spare) -+ retval = -+ mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, -+ &dummy, spareAsBytes); -+ } -+#endif -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+} -+ -+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+ __u32 addr = -+ ((loff_t) blockNumber) * dev->nDataBytesPerChunk -+ * dev->nChunksPerBlock; -+ struct erase_info ei; -+ int retval = 0; -+ -+ ei.mtd = mtd; -+ ei.addr = addr; -+ ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock; -+ ei.time = 1000; -+ ei.retries = 2; -+ ei.callback = NULL; -+ ei.priv = (u_long) dev; -+ -+ /* Todo finish off the ei if required */ -+ -+ sema_init(&dev->sem, 0); -+ -+ retval = mtd->erase(mtd, &ei); -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+} -+ -+int nandmtd_InitialiseNAND(yaffs_Device * dev) -+{ -+ return YAFFS_OK; -+} -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,27 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_MTDIF_H__ -+#define __YAFFS_MTDIF_H__ -+ -+#include "yaffs_guts.h" -+ -+int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, const yaffs_Spare * spare); -+int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, -+ yaffs_Spare * spare); -+int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber); -+int nandmtd_InitialiseNAND(yaffs_Device * dev); -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1-compat.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1-compat.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,434 @@ -+From ian@brightstareng.com Fri May 18 15:06:49 2007 -+From ian@brightstareng.com Fri May 18 15:08:21 2007 -+Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com) -+ by apollo.linkchoose.co.uk with esmtp (Exim 4.60) -+ (envelope-from <ian@brightstareng.com>) -+ id 1Hp380-00011e-T6 -+ for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100 -+Received: from localhost (localhost.localdomain [127.0.0.1]) -+ by zebra.brightstareng.com (Postfix) with ESMTP -+ id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT) -+Received: from zebra.brightstareng.com ([127.0.0.1]) -+ by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP -+ id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT) -+Received: from pippin (unknown [192.168.1.25]) -+ by zebra.brightstareng.com (Postfix) with ESMTP -+ id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT) -+From: Ian McDonnell <ian@brightstareng.com> -+To: David Goodenough <david.goodenough@linkchoose.co.uk> -+Subject: Re: something tested this time -- yaffs_mtdif1-compat.c -+Date: Fri, 18 May 2007 10:06:49 -0400 -+User-Agent: KMail/1.9.1 -+References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk> -+In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk> -+Cc: Andrea Conti <alyf@alyf.net>, -+ Charles Manning <manningc2@actrix.gen.nz> -+MIME-Version: 1.0 -+Content-Type: Multipart/Mixed; -+ boundary="Boundary-00=_5LbTGmt62YoutxM" -+Message-Id: <200705181006.49860.ian@brightstareng.com> -+X-Virus-Scanned: by amavisd-new at brightstareng.com -+Status: R -+X-Status: NT -+X-KMail-EncryptionState: -+X-KMail-SignatureState: -+X-KMail-MDN-Sent: -+ -+--Boundary-00=_5LbTGmt62YoutxM -+Content-Type: text/plain; -+ charset="iso-8859-15" -+Content-Transfer-Encoding: 7bit -+Content-Disposition: inline -+ -+David, Andrea, -+ -+On Friday 18 May 2007 08:34, you wrote: -+> Yea team. With this fix in place (I put it in the wrong place -+> at first) I can now mount and ls the Yaffs partition without -+> an error messages! -+ -+Good news! -+ -+Attached is a newer yaffs_mtdif1.c with a bandaid to help the -+2.6.18 and 2.6.19 versions of MTD not trip on the oob read. -+See the LINUX_VERSION_CODE conditional in -+nandmtd1_ReadChunkWithTagsFromNAND. -+ -+-imcd -+ -+--Boundary-00=_5LbTGmt62YoutxM -+Content-Type: text/x-csrc; -+ charset="iso-8859-15"; -+ name="yaffs_mtdif1.c" -+Content-Transfer-Encoding: 7bit -+Content-Disposition: attachment; -+ filename="yaffs_mtdif1.c" -+ -+/* -+ * YAFFS: Yet another FFS. A NAND-flash specific file system. -+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND. -+ * -+ * Copyright (C) 2002 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+/* -+ * This module provides the interface between yaffs_nand.c and the -+ * MTD API. This version is used when the MTD interface supports the -+ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17, -+ * and we have small-page NAND device. -+ * -+ * These functions are invoked via function pointers in yaffs_nand.c. -+ * This replaces functionality provided by functions in yaffs_mtdif.c -+ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are -+ * called in yaffs_mtdif.c when the function pointers are NULL. -+ * We assume the MTD layer is performing ECC (useNANDECC is true). -+ */ -+ -+#include "yportenv.h" -+#include "yaffs_guts.h" -+#include "yaffs_packedtags1.h" -+#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC -+ -+#include "linux/kernel.h" -+#include "linux/version.h" -+#include "linux/types.h" -+#include "linux/mtd/mtd.h" -+ -+/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ -+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $"; -+ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+# define YTAG1_SIZE 8 -+#else -+# define YTAG1_SIZE 9 -+#endif -+ -+#if 0 -+/* Use the following nand_ecclayout with MTD when using -+ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout. -+ * If you have existing Yaffs images and the byte order differs from this, -+ * adjust 'oobfree' to match your existing Yaffs data. -+ * -+ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the -+ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to -+ * the 9th byte. -+ * -+ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5 -+ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P -+ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus -+ * byte and B is the small-page bad-block indicator byte. -+ */ -+static struct nand_ecclayout nand_oob_16 = { -+ .eccbytes = 6, -+ .eccpos = { 8, 9, 10, 13, 14, 15 }, -+ .oobavail = 9, -+ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } -+}; -+#endif -+ -+/* Write a chunk (page) of data to NAND. -+ * -+ * Caller always provides ExtendedTags data which are converted to a more -+ * compact (packed) form for storage in NAND. A mini-ECC runs over the -+ * contents of the tags meta-data; used to valid the tags when read. -+ * -+ * - Pack ExtendedTags to PackedTags1 form -+ * - Compute mini-ECC for PackedTags1 -+ * - Write data and packed tags to NAND. -+ * -+ * Note: Due to the use of the PackedTags1 meta-data which does not include -+ * a full sequence number (as found in the larger PackedTags2 form) it is -+ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as -+ * discarded and dirty. This is not ideal: newer NAND parts are supposed -+ * to be written just once. When Yaffs performs this operation, this -+ * function is called with a NULL data pointer -- calling MTD write_oob -+ * without data is valid usage (2.6.17). -+ * -+ * Any underlying MTD error results in YAFFS_FAIL. -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, -+ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkBytes = dev->nDataBytesPerChunk; -+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; -+ struct mtd_oob_ops ops; -+ yaffs_PackedTags1 pt1; -+ int retval; -+ -+ /* we assume that PackedTags1 and yaffs_Tags are compatible */ -+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12); -+ compile_time_assertion(sizeof(yaffs_Tags) == 8); -+ -+ yaffs_PackTags1(&pt1, etags); -+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1); -+ -+ /* When deleting a chunk, the upper layer provides only skeletal -+ * etags, one with chunkDeleted set. However, we need to update the -+ * tags, not erase them completely. So we use the NAND write property -+ * that only zeroed-bits stick and set tag bytes to all-ones and -+ * zero just the (not) deleted bit. -+ */ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+ if (etags->chunkDeleted) { -+ memset(&pt1, 0xff, 8); -+ /* clear delete status bit to indicate deleted */ -+ pt1.deleted = 0; -+ } -+#else -+ ((__u8 *)&pt1)[8] = 0xff; -+ if (etags->chunkDeleted) { -+ memset(&pt1, 0xff, 8); -+ /* zero pageStatus byte to indicate deleted */ -+ ((__u8 *)&pt1)[8] = 0; -+ } -+#endif -+ -+ memset(&ops, 0, sizeof(ops)); -+ ops.mode = MTD_OOB_AUTO; -+ ops.len = (data) ? chunkBytes : 0; -+ ops.ooblen = YTAG1_SIZE; -+ ops.datbuf = (__u8 *)data; -+ ops.oobbuf = (__u8 *)&pt1; -+ -+ retval = mtd->write_oob(mtd, addr, &ops); -+ if (retval) { -+ yaffs_trace(YAFFS_TRACE_MTD, -+ "write_oob failed, chunk %d, mtd error %d\n", -+ chunkInNAND, retval); -+ } -+ return retval ? YAFFS_FAIL : YAFFS_OK; -+} -+ -+/* Return with empty ExtendedTags but add eccResult. -+ */ -+static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval) -+{ -+ if (etags) { -+ memset(etags, 0, sizeof(*etags)); -+ etags->eccResult = eccResult; -+ } -+ return retval; -+} -+ -+/* Read a chunk (page) from NAND. -+ * -+ * Caller expects ExtendedTags data to be usable even on error; that is, -+ * all members except eccResult and blockBad are zeroed. -+ * -+ * - Check ECC results for data (if applicable) -+ * - Check for blank/erased block (return empty ExtendedTags if blank) -+ * - Check the PackedTags1 mini-ECC (correct if necessary/possible) -+ * - Convert PackedTags1 to ExtendedTags -+ * - Update eccResult and blockBad members to refect state. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, -+ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkBytes = dev->nDataBytesPerChunk; -+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; -+ int eccres = YAFFS_ECC_RESULT_NO_ERROR; -+ struct mtd_oob_ops ops; -+ yaffs_PackedTags1 pt1; -+ int retval; -+ int deleted; -+ -+ memset(&ops, 0, sizeof(ops)); -+ ops.mode = MTD_OOB_AUTO; -+ ops.len = (data) ? chunkBytes : 0; -+ ops.ooblen = YTAG1_SIZE; -+ ops.datbuf = data; -+ ops.oobbuf = (__u8 *)&pt1; -+ -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) -+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug; -+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL. -+ */ -+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen; -+#endif -+ /* Read page and oob using MTD. -+ * Check status and determine ECC result. -+ */ -+ retval = mtd->read_oob(mtd, addr, &ops); -+ if (retval) { -+ yaffs_trace(YAFFS_TRACE_MTD, -+ "read_oob failed, chunk %d, mtd error %d\n", -+ chunkInNAND, retval); -+ } -+ -+ switch (retval) { -+ case 0: -+ /* no error */ -+ break; -+ -+ case -EUCLEAN: -+ /* MTD's ECC fixed the data */ -+ eccres = YAFFS_ECC_RESULT_FIXED; -+ dev->eccFixed++; -+ break; -+ -+ case -EBADMSG: -+ /* MTD's ECC could not fix the data */ -+ dev->eccUnfixed++; -+ /* fall into... */ -+ default: -+ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); -+ etags->blockBad = (mtd->block_isbad)(mtd, addr); -+ return YAFFS_FAIL; -+ } -+ -+ /* Check for a blank/erased chunk. -+ */ -+ if (yaffs_CheckFF((__u8 *)&pt1, 8)) { -+ /* when blank, upper layers want eccResult to be <= NO_ERROR */ -+ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); -+ } -+ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+ /* Read deleted status (bit) then return it to it's non-deleted -+ * state before performing tags mini-ECC check. pt1.deleted is -+ * inverted. -+ */ -+ deleted = !pt1.deleted; -+ pt1.deleted = 1; -+#else -+ (void) deleted; /* not used */ -+#endif -+ -+ /* Check the packed tags mini-ECC and correct if necessary/possible. -+ */ -+ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1); -+ switch (retval) { -+ case 0: -+ /* no tags error, use MTD result */ -+ break; -+ case 1: -+ /* recovered tags-ECC error */ -+ dev->tagsEccFixed++; -+ eccres = YAFFS_ECC_RESULT_FIXED; -+ break; -+ default: -+ /* unrecovered tags-ECC error */ -+ dev->tagsEccUnfixed++; -+ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); -+ } -+ -+ /* Unpack the tags to extended form and set ECC result. -+ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy] -+ */ -+ pt1.shouldBeFF = 0xFFFFFFFF; -+ yaffs_UnpackTags1(etags, &pt1); -+ etags->eccResult = eccres; -+ -+ /* Set deleted state. -+ */ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+ etags->chunkDeleted = deleted; -+#else -+ etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7); -+#endif -+ return YAFFS_OK; -+} -+ -+/* Mark a block bad. -+ * -+ * This is a persistant state. -+ * Use of this function should be rare. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk; -+ int retval; -+ -+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo); -+ -+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo); -+ return (retval) ? YAFFS_FAIL : YAFFS_OK; -+} -+ -+/* Check any MTD prerequists. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+static int nandmtd1_TestPrerequists(struct mtd_info * mtd) -+{ -+ /* 2.6.18 has mtd->ecclayout->oobavail */ -+ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */ -+ int oobavail = mtd->ecclayout->oobavail; -+ -+ if (oobavail < YTAG1_SIZE) { -+ yaffs_trace(YAFFS_TRACE_ERROR, -+ "mtd device has only %d bytes for tags, need %d", -+ oobavail, YTAG1_SIZE); -+ return YAFFS_FAIL; -+ } -+ return YAFFS_OK; -+} -+ -+/* Query for the current state of a specific block. -+ * -+ * Examine the tags of the first chunk of the block and return the state: -+ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad -+ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use -+ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean -+ * -+ * Always returns YAFFS_OK. -+ */ -+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, -+ yaffs_BlockState * pState, int *pSequenceNumber) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkNo = blockNo * dev->nChunksPerBlock; -+ yaffs_ExtendedTags etags; -+ int state = YAFFS_BLOCK_STATE_DEAD; -+ int seqnum = 0; -+ int retval; -+ -+ /* We don't yet have a good place to test for MTD config prerequists. -+ * Do it here as we are called during the initial scan. -+ */ -+ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) { -+ return YAFFS_FAIL; -+ } -+ -+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags); -+ if (etags.blockBad) { -+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, -+ "block %d is marked bad", blockNo); -+ state = YAFFS_BLOCK_STATE_DEAD; -+ } -+ else if (etags.chunkUsed) { -+ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; -+ seqnum = etags.sequenceNumber; -+ } -+ else { -+ state = YAFFS_BLOCK_STATE_EMPTY; -+ } -+ -+ *pState = state; -+ *pSequenceNumber = seqnum; -+ -+ /* query always succeeds */ -+ return YAFFS_OK; -+} -+ -+#endif /*KERNEL_VERSION*/ -+ -+--Boundary-00=_5LbTGmt62YoutxM-- -+ -+ -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,363 @@ -+/* -+ * YAFFS: Yet another FFS. A NAND-flash specific file system. -+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND. -+ * -+ * Copyright (C) 2002 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+/* -+ * This module provides the interface between yaffs_nand.c and the -+ * MTD API. This version is used when the MTD interface supports the -+ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17, -+ * and we have small-page NAND device. -+ * -+ * These functions are invoked via function pointers in yaffs_nand.c. -+ * This replaces functionality provided by functions in yaffs_mtdif.c -+ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are -+ * called in yaffs_mtdif.c when the function pointers are NULL. -+ * We assume the MTD layer is performing ECC (useNANDECC is true). -+ */ -+ -+#include "yportenv.h" -+#include "yaffs_guts.h" -+#include "yaffs_packedtags1.h" -+#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC -+ -+#include "linux/kernel.h" -+#include "linux/version.h" -+#include "linux/types.h" -+#include "linux/mtd/mtd.h" -+ -+/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ -+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.3 2007/05/15 20:16:11 ian Exp $"; -+ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+# define YTAG1_SIZE 8 -+#else -+# define YTAG1_SIZE 9 -+#endif -+ -+#if 0 -+/* Use the following nand_ecclayout with MTD when using -+ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout. -+ * If you have existing Yaffs images and the byte order differs from this, -+ * adjust 'oobfree' to match your existing Yaffs data. -+ * -+ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the -+ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to -+ * the 9th byte. -+ * -+ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5 -+ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P -+ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus -+ * byte and B is the small-page bad-block indicator byte. -+ */ -+static struct nand_ecclayout nand_oob_16 = { -+ .eccbytes = 6, -+ .eccpos = { 8, 9, 10, 13, 14, 15 }, -+ .oobavail = 9, -+ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } -+}; -+#endif -+ -+/* Write a chunk (page) of data to NAND. -+ * -+ * Caller always provides ExtendedTags data which are converted to a more -+ * compact (packed) form for storage in NAND. A mini-ECC runs over the -+ * contents of the tags meta-data; used to valid the tags when read. -+ * -+ * - Pack ExtendedTags to PackedTags1 form -+ * - Compute mini-ECC for PackedTags1 -+ * - Write data and packed tags to NAND. -+ * -+ * Note: Due to the use of the PackedTags1 meta-data which does not include -+ * a full sequence number (as found in the larger PackedTags2 form) it is -+ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as -+ * discarded and dirty. This is not ideal: newer NAND parts are supposed -+ * to be written just once. When Yaffs performs this operation, this -+ * function is called with a NULL data pointer -- calling MTD write_oob -+ * without data is valid usage (2.6.17). -+ * -+ * Any underlying MTD error results in YAFFS_FAIL. -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, -+ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkBytes = dev->nDataBytesPerChunk; -+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; -+ struct mtd_oob_ops ops; -+ yaffs_PackedTags1 pt1; -+ int retval; -+ -+ /* we assume that PackedTags1 and yaffs_Tags are compatible */ -+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12); -+ compile_time_assertion(sizeof(yaffs_Tags) == 8); -+ -+ dev->nPageWrites++; -+ -+ yaffs_PackTags1(&pt1, etags); -+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1); -+ -+ /* When deleting a chunk, the upper layer provides only skeletal -+ * etags, one with chunkDeleted set. However, we need to update the -+ * tags, not erase them completely. So we use the NAND write property -+ * that only zeroed-bits stick and set tag bytes to all-ones and -+ * zero just the (not) deleted bit. -+ */ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+ if (etags->chunkDeleted) { -+ memset(&pt1, 0xff, 8); -+ /* clear delete status bit to indicate deleted */ -+ pt1.deleted = 0; -+ } -+#else -+ ((__u8 *)&pt1)[8] = 0xff; -+ if (etags->chunkDeleted) { -+ memset(&pt1, 0xff, 8); -+ /* zero pageStatus byte to indicate deleted */ -+ ((__u8 *)&pt1)[8] = 0; -+ } -+#endif -+ -+ memset(&ops, 0, sizeof(ops)); -+ ops.mode = MTD_OOB_AUTO; -+ ops.len = (data) ? chunkBytes : 0; -+ ops.ooblen = YTAG1_SIZE; -+ ops.datbuf = (__u8 *)data; -+ ops.oobbuf = (__u8 *)&pt1; -+ -+ retval = mtd->write_oob(mtd, addr, &ops); -+ if (retval) { -+ yaffs_trace(YAFFS_TRACE_MTD, -+ "write_oob failed, chunk %d, mtd error %d\n", -+ chunkInNAND, retval); -+ } -+ return retval ? YAFFS_FAIL : YAFFS_OK; -+} -+ -+/* Return with empty ExtendedTags but add eccResult. -+ */ -+static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval) -+{ -+ if (etags) { -+ memset(etags, 0, sizeof(*etags)); -+ etags->eccResult = eccResult; -+ } -+ return retval; -+} -+ -+/* Read a chunk (page) from NAND. -+ * -+ * Caller expects ExtendedTags data to be usable even on error; that is, -+ * all members except eccResult and blockBad are zeroed. -+ * -+ * - Check ECC results for data (if applicable) -+ * - Check for blank/erased block (return empty ExtendedTags if blank) -+ * - Check the PackedTags1 mini-ECC (correct if necessary/possible) -+ * - Convert PackedTags1 to ExtendedTags -+ * - Update eccResult and blockBad members to refect state. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, -+ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkBytes = dev->nDataBytesPerChunk; -+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; -+ int eccres = YAFFS_ECC_RESULT_NO_ERROR; -+ struct mtd_oob_ops ops; -+ yaffs_PackedTags1 pt1; -+ int retval; -+ int deleted; -+ -+ dev->nPageReads++; -+ -+ memset(&ops, 0, sizeof(ops)); -+ ops.mode = MTD_OOB_AUTO; -+ ops.len = (data) ? chunkBytes : 0; -+ ops.ooblen = YTAG1_SIZE; -+ ops.datbuf = data; -+ ops.oobbuf = (__u8 *)&pt1; -+ -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) -+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug; -+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL. -+ */ -+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen; -+#endif -+ /* Read page and oob using MTD. -+ * Check status and determine ECC result. -+ */ -+ retval = mtd->read_oob(mtd, addr, &ops); -+ if (retval) { -+ yaffs_trace(YAFFS_TRACE_MTD, -+ "read_oob failed, chunk %d, mtd error %d\n", -+ chunkInNAND, retval); -+ } -+ -+ switch (retval) { -+ case 0: -+ /* no error */ -+ break; -+ -+ case -EUCLEAN: -+ /* MTD's ECC fixed the data */ -+ eccres = YAFFS_ECC_RESULT_FIXED; -+ dev->eccFixed++; -+ break; -+ -+ case -EBADMSG: -+ /* MTD's ECC could not fix the data */ -+ dev->eccUnfixed++; -+ /* fall into... */ -+ default: -+ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); -+ etags->blockBad = (mtd->block_isbad)(mtd, addr); -+ return YAFFS_FAIL; -+ } -+ -+ /* Check for a blank/erased chunk. -+ */ -+ if (yaffs_CheckFF((__u8 *)&pt1, 8)) { -+ /* when blank, upper layers want eccResult to be <= NO_ERROR */ -+ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); -+ } -+ -+#ifndef CONFIG_YAFFS_9BYTE_TAGS -+ /* Read deleted status (bit) then return it to it's non-deleted -+ * state before performing tags mini-ECC check. pt1.deleted is -+ * inverted. -+ */ -+ deleted = !pt1.deleted; -+ pt1.deleted = 1; -+#else -+ deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7); -+#endif -+ -+ /* Check the packed tags mini-ECC and correct if necessary/possible. -+ */ -+ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1); -+ switch (retval) { -+ case 0: -+ /* no tags error, use MTD result */ -+ break; -+ case 1: -+ /* recovered tags-ECC error */ -+ dev->tagsEccFixed++; -+ if (eccres == YAFFS_ECC_RESULT_NO_ERROR) -+ eccres = YAFFS_ECC_RESULT_FIXED; -+ break; -+ default: -+ /* unrecovered tags-ECC error */ -+ dev->tagsEccUnfixed++; -+ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); -+ } -+ -+ /* Unpack the tags to extended form and set ECC result. -+ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy] -+ */ -+ pt1.shouldBeFF = 0xFFFFFFFF; -+ yaffs_UnpackTags1(etags, &pt1); -+ etags->eccResult = eccres; -+ -+ /* Set deleted state */ -+ etags->chunkDeleted = deleted; -+ return YAFFS_OK; -+} -+ -+/* Mark a block bad. -+ * -+ * This is a persistant state. -+ * Use of this function should be rare. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk; -+ int retval; -+ -+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo); -+ -+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo); -+ return (retval) ? YAFFS_FAIL : YAFFS_OK; -+} -+ -+/* Check any MTD prerequists. -+ * -+ * Returns YAFFS_OK or YAFFS_FAIL. -+ */ -+static int nandmtd1_TestPrerequists(struct mtd_info * mtd) -+{ -+ /* 2.6.18 has mtd->ecclayout->oobavail */ -+ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */ -+ int oobavail = mtd->ecclayout->oobavail; -+ -+ if (oobavail < YTAG1_SIZE) { -+ yaffs_trace(YAFFS_TRACE_ERROR, -+ "mtd device has only %d bytes for tags, need %d\n", -+ oobavail, YTAG1_SIZE); -+ return YAFFS_FAIL; -+ } -+ return YAFFS_OK; -+} -+ -+/* Query for the current state of a specific block. -+ * -+ * Examine the tags of the first chunk of the block and return the state: -+ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad -+ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use -+ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean -+ * -+ * Always returns YAFFS_OK. -+ */ -+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, -+ yaffs_BlockState * pState, int *pSequenceNumber) -+{ -+ struct mtd_info * mtd = dev->genericDevice; -+ int chunkNo = blockNo * dev->nChunksPerBlock; -+ yaffs_ExtendedTags etags; -+ int state = YAFFS_BLOCK_STATE_DEAD; -+ int seqnum = 0; -+ int retval; -+ -+ /* We don't yet have a good place to test for MTD config prerequists. -+ * Do it here as we are called during the initial scan. -+ */ -+ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) { -+ return YAFFS_FAIL; -+ } -+ -+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags); -+ if (etags.blockBad) { -+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, -+ "block %d is marked bad", blockNo); -+ state = YAFFS_BLOCK_STATE_DEAD; -+ } -+ else if (etags.chunkUsed) { -+ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; -+ seqnum = etags.sequenceNumber; -+ } -+ else { -+ state = YAFFS_BLOCK_STATE_EMPTY; -+ } -+ -+ *pState = state; -+ *pSequenceNumber = seqnum; -+ -+ /* query always succeeds */ -+ return YAFFS_OK; -+} -+ -+#endif /*KERNEL_VERSION*/ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif1.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif1.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,28 @@ -+/* -+ * YAFFS: Yet another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_MTDIF1_H__ -+#define __YAFFS_MTDIF1_H__ -+ -+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, const yaffs_ExtendedTags * tags); -+ -+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, -+ __u8 * data, yaffs_ExtendedTags * tags); -+ -+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -+ -+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, -+ yaffs_BlockState * state, int *sequenceNumber); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,232 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+/* mtd interface for YAFFS2 */ -+ -+const char *yaffs_mtdif2_c_version = -+ "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $"; -+ -+#include "yportenv.h" -+ -+ -+#include "yaffs_mtdif2.h" -+ -+#include "linux/mtd/mtd.h" -+#include "linux/types.h" -+#include "linux/time.h" -+ -+#include "yaffs_packedtags2.h" -+ -+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, -+ const yaffs_ExtendedTags * tags) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ struct mtd_oob_ops ops; -+#else -+ size_t dummy; -+#endif -+ int retval = 0; -+ -+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -+ -+ yaffs_PackedTags2 pt; -+ -+ T(YAFFS_TRACE_MTD, -+ (TSTR -+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" -+ TENDSTR), chunkInNAND, data, tags)); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ if (tags) -+ yaffs_PackTags2(&pt, tags); -+ else -+ BUG(); /* both tags and data should always be present */ -+ -+ if (data) { -+ ops.mode = MTD_OOB_AUTO; -+ ops.ooblen = sizeof(pt); -+ ops.len = dev->nDataBytesPerChunk; -+ ops.ooboffs = 0; -+ ops.datbuf = (__u8 *)data; -+ ops.oobbuf = (void *)&pt; -+ retval = mtd->write_oob(mtd, addr, &ops); -+ } else -+ BUG(); /* both tags and data should always be present */ -+#else -+ if (tags) { -+ yaffs_PackTags2(&pt, tags); -+ } -+ -+ if (data && tags) { -+ if (dev->useNANDECC) -+ retval = -+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, (__u8 *) & pt, NULL); -+ else -+ retval = -+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, (__u8 *) & pt, NULL); -+ } else { -+ if (data) -+ retval = -+ mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, -+ data); -+ if (tags) -+ retval = -+ mtd->write_oob(mtd, addr, mtd->oobsize, &dummy, -+ (__u8 *) & pt); -+ -+ } -+#endif -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+} -+ -+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, -+ __u8 * data, yaffs_ExtendedTags * tags) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ struct mtd_oob_ops ops; -+#endif -+ size_t dummy; -+ int retval = 0; -+ -+ loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -+ -+ yaffs_PackedTags2 pt; -+ -+ T(YAFFS_TRACE_MTD, -+ (TSTR -+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" -+ TENDSTR), chunkInNAND, data, tags)); -+ -+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -+ if (data && !tags) -+ retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data); -+ else if (tags) { -+ ops.mode = MTD_OOB_AUTO; -+ ops.ooblen = sizeof(pt); -+ ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt); -+ ops.ooboffs = 0; -+ ops.datbuf = data; -+ ops.oobbuf = dev->spareBuffer; -+ retval = mtd->read_oob(mtd, addr, &ops); -+ } -+#else -+ if (data && tags) { -+ if (dev->useNANDECC) { -+ retval = -+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, dev->spareBuffer, -+ NULL); -+ } else { -+ retval = -+ mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, -+ &dummy, data, dev->spareBuffer, -+ NULL); -+ } -+ } else { -+ if (data) -+ retval = -+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, -+ data); -+ if (tags) -+ retval = -+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, -+ dev->spareBuffer); -+ } -+#endif -+ -+ memcpy(&pt, dev->spareBuffer, sizeof(pt)); -+ -+ if (tags) -+ yaffs_UnpackTags2(tags, &pt); -+ -+ if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) -+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+} -+ -+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+ int retval; -+ T(YAFFS_TRACE_MTD, -+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); -+ -+ retval = -+ mtd->block_markbad(mtd, -+ blockNo * dev->nChunksPerBlock * -+ dev->nDataBytesPerChunk); -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+ -+} -+ -+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, -+ yaffs_BlockState * state, int *sequenceNumber) -+{ -+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -+ int retval; -+ -+ T(YAFFS_TRACE_MTD, -+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); -+ retval = -+ mtd->block_isbad(mtd, -+ blockNo * dev->nChunksPerBlock * -+ dev->nDataBytesPerChunk); -+ -+ if (retval) { -+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); -+ -+ *state = YAFFS_BLOCK_STATE_DEAD; -+ *sequenceNumber = 0; -+ } else { -+ yaffs_ExtendedTags t; -+ nandmtd2_ReadChunkWithTagsFromNAND(dev, -+ blockNo * -+ dev->nChunksPerBlock, NULL, -+ &t); -+ -+ if (t.chunkUsed) { -+ *sequenceNumber = t.sequenceNumber; -+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; -+ } else { -+ *sequenceNumber = 0; -+ *state = YAFFS_BLOCK_STATE_EMPTY; -+ } -+ } -+ T(YAFFS_TRACE_MTD, -+ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, -+ *state)); -+ -+ if (retval == 0) -+ return YAFFS_OK; -+ else -+ return YAFFS_FAIL; -+} -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_mtdif2.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_mtdif2.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,29 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_MTDIF2_H__ -+#define __YAFFS_MTDIF2_H__ -+ -+#include "yaffs_guts.h" -+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, -+ const __u8 * data, -+ const yaffs_ExtendedTags * tags); -+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, -+ __u8 * data, yaffs_ExtendedTags * tags); -+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, -+ yaffs_BlockState * state, int *sequenceNumber); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.c linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_nand.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,134 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+const char *yaffs_nand_c_version = -+ "$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $"; -+ -+#include "yaffs_nand.h" -+#include "yaffs_tagscompat.h" -+#include "yaffs_tagsvalidity.h" -+ -+ -+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, -+ __u8 * buffer, -+ yaffs_ExtendedTags * tags) -+{ -+ int result; -+ yaffs_ExtendedTags localTags; -+ -+ int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; -+ -+ /* If there are no tags provided, use local tags to get prioritised gc working */ -+ if(!tags) -+ tags = &localTags; -+ -+ if (dev->readChunkWithTagsFromNAND) -+ result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, -+ tags); -+ else -+ result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, -+ realignedChunkInNAND, -+ buffer, -+ tags); -+ if(tags && -+ tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){ -+ -+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock); -+ yaffs_HandleChunkError(dev,bi); -+ } -+ -+ return result; -+} -+ -+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); -+} -+ -+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); -+} -+ -+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); -+} -+ -+ -+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, -+ int blockInNAND) -+{ -+ int result; -+ -+ blockInNAND -= dev->blockOffset; -+ -+ -+ dev->nBlockErasures++; -+ result = dev->eraseBlockInNAND(dev, blockInNAND); -+ -+ return result; -+} -+ -+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) -+{ -+ return dev->initialiseNAND(dev); -+} -+ -+ -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nand.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_nand.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nand.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,44 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_NAND_H__ -+#define __YAFFS_NAND_H__ -+#include "yaffs_guts.h" -+ -+ -+ -+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, -+ __u8 * buffer, -+ yaffs_ExtendedTags * tags); -+ -+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, -+ int chunkInNAND, -+ const __u8 * buffer, -+ yaffs_ExtendedTags * tags); -+ -+int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo); -+ -+int yaffs_QueryInitialBlockState(yaffs_Device * dev, -+ int blockNo, -+ yaffs_BlockState * state, -+ unsigned *sequenceNumber); -+ -+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, -+ int blockInNAND); -+ -+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev); -+ -+#endif -+ -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_nandemul2k.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_nandemul2k.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,39 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * 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. -+ */ -+ -+/* Interface to emulated NAND functions (2k page size) */ -+ -+#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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.c 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,52 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+#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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags1.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags1.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,37 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */ -+ -+#ifndef __YAFFS_PACKEDTAGS1_H__ -+#define __YAFFS_PACKEDTAGS1_H__ -+ -+#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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.c 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,182 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+#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 */ -+ /* We save the parent object in the chunkId */ -+ pt->t.chunkId = EXTRA_HEADER_INFO_FLAG -+ | t->extraParentObjectId; -+ 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 = YAFFS_ECC_RESULT_NO_ERROR; -+ } -+#else -+ { -+ yaffs_ECCOther ecc; -+ int result; -+ yaffs_ECCCalculateOther((unsigned char *)&pt->t, -+ sizeof -+ (yaffs_PackedTags2TagsPart), -+ &ecc); -+ result = -+ yaffs_ECCCorrectOther((unsigned char *)&pt->t, -+ sizeof -+ (yaffs_PackedTags2TagsPart), -+ &pt->ecc, &ecc); -+ switch(result){ -+ case 0: -+ t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; -+ break; -+ case 1: -+ t->eccResult = YAFFS_ECC_RESULT_FIXED; -+ break; -+ case -1: -+ t->eccResult = YAFFS_ECC_RESULT_UNFIXED; -+ break; -+ default: -+ t->eccResult = YAFFS_ECC_RESULT_UNKNOWN; -+ } -+ } -+#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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_packedtags2.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_packedtags2.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,38 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+/* This is used to pack YAFFS2 tags, not YAFFS1tags. */ -+ -+#ifndef __YAFFS_PACKEDTAGS2_H__ -+#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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.c 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,160 @@ -+/* -+ * Copyright (c) 1992, 1993 -+ * The Regents of the University of California. All rights reserved. -+ * -+ * Redistribution and use in source and binary forms, with or without -+ * modification, are permitted provided that the following conditions -+ * are met: -+ * 1. Redistributions of source code must retain the above copyright -+ * notice, this list of conditions and the following disclaimer. -+ * 2. Redistributions in binary form must reproduce the above copyright -+ * notice, this list of conditions and the following disclaimer in the -+ * documentation and/or other materials provided with the distribution. -+ * 3. Neither the name of the University nor the names of its contributors -+ * may be used to endorse or promote products derived from this software -+ * without specific prior written permission. -+ * -+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -+ * SUCH DAMAGE. -+ */ -+ -+#include "yportenv.h" -+//#include <linux/string.h> -+ -+/* -+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". -+ */ -+#define swapcode(TYPE, parmi, parmj, n) { \ -+ long i = (n) / sizeof (TYPE); \ -+ register TYPE *pi = (TYPE *) (parmi); \ -+ register TYPE *pj = (TYPE *) (parmj); \ -+ do { \ -+ register TYPE t = *pi; \ -+ *pi++ = *pj; \ -+ *pj++ = t; \ -+ } while (--i > 0); \ -+} -+ -+#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ -+ es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; -+ -+static __inline void -+swapfunc(char *a, char *b, int n, int swaptype) -+{ -+ if (swaptype <= 1) -+ swapcode(long, a, b, n) -+ else -+ swapcode(char, a, b, n) -+} -+ -+#define swap(a, b) \ -+ if (swaptype == 0) { \ -+ long t = *(long *)(a); \ -+ *(long *)(a) = *(long *)(b); \ -+ *(long *)(b) = t; \ -+ } else \ -+ swapfunc(a, b, es, swaptype) -+ -+#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) -+ -+static __inline char * -+med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *)) -+{ -+ return cmp(a, b) < 0 ? -+ (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a )) -+ :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c )); -+} -+ -+#ifndef min -+#define min(a,b) (((a) < (b)) ? (a) : (b)) -+#endif -+ -+void -+yaffs_qsort(void *aa, size_t n, size_t es, -+ int (*cmp)(const void *, const void *)) -+{ -+ char *pa, *pb, *pc, *pd, *pl, *pm, *pn; -+ int d, r, swaptype, swap_cnt; -+ register char *a = aa; -+ -+loop: SWAPINIT(a, es); -+ swap_cnt = 0; -+ if (n < 7) { -+ for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es) -+ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; -+ pl -= es) -+ swap(pl, pl - es); -+ return; -+ } -+ pm = (char *)a + (n / 2) * es; -+ if (n > 7) { -+ pl = (char *)a; -+ pn = (char *)a + (n - 1) * es; -+ if (n > 40) { -+ d = (n / 8) * es; -+ pl = med3(pl, pl + d, pl + 2 * d, cmp); -+ pm = med3(pm - d, pm, pm + d, cmp); -+ pn = med3(pn - 2 * d, pn - d, pn, cmp); -+ } -+ pm = med3(pl, pm, pn, cmp); -+ } -+ swap(a, pm); -+ pa = pb = (char *)a + es; -+ -+ pc = pd = (char *)a + (n - 1) * es; -+ for (;;) { -+ while (pb <= pc && (r = cmp(pb, a)) <= 0) { -+ if (r == 0) { -+ swap_cnt = 1; -+ swap(pa, pb); -+ pa += es; -+ } -+ pb += es; -+ } -+ while (pb <= pc && (r = cmp(pc, a)) >= 0) { -+ if (r == 0) { -+ swap_cnt = 1; -+ swap(pc, pd); -+ pd -= es; -+ } -+ pc -= es; -+ } -+ if (pb > pc) -+ break; -+ swap(pb, pc); -+ swap_cnt = 1; -+ pb += es; -+ pc -= es; -+ } -+ if (swap_cnt == 0) { /* Switch to insertion sort */ -+ for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) -+ for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; -+ pl -= es) -+ swap(pl, pl - es); -+ return; -+ } -+ -+ pn = (char *)a + n * es; -+ r = min(pa - (char *)a, pb - pa); -+ vecswap(a, pb - r, r); -+ r = min((long)(pd - pc), (long)(pn - pd - es)); -+ vecswap(pb, pn - r, r); -+ if ((r = pb - pa) > es) -+ yaffs_qsort(a, r / es, es, cmp); -+ if ((r = pd - pc) > es) { -+ /* Iterate rather than recurse to save stack space */ -+ a = pn - r; -+ n = r / es; -+ goto loop; -+ } -+/* yaffs_qsort(pn - r, r / es, es, cmp);*/ -+} -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_qsort.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_qsort.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,23 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+ -+#ifndef __YAFFS_QSORT_H__ -+#define __YAFFS_QSORT_H__ -+ -+extern void yaffs_qsort (void *const base, size_t total_elems, size_t size, -+ int (*cmp)(const void *, const void *)); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.c 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,530 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+#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 -+}; -+ -+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 -+ ("**>>yaffs ecc error fix performed on chunk %d:0" -+ TENDSTR), chunkInNAND)); -+ dev->eccFixed++; -+ } else if (eccResult1 < 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>yaffs ecc error unfixed on chunk %d:0" -+ TENDSTR), chunkInNAND)); -+ dev->eccUnfixed++; -+ } -+ -+ if (eccResult2 > 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>yaffs ecc error fix performed on chunk %d:1" -+ TENDSTR), chunkInNAND)); -+ dev->eccFixed++; -+ } else if (eccResult2 < 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>yaffs ecc error unfixed on chunk %d:1" -+ TENDSTR), chunkInNAND)); -+ dev->eccUnfixed++; -+ } -+ -+ if (eccResult1 || eccResult2) { -+ /* 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 -+ ("**>>mtd ecc error fix performed on chunk %d:0" -+ TENDSTR), chunkInNAND)); -+ } else if (nspare.eccres1 < 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>mtd ecc error unfixed on chunk %d:0" -+ TENDSTR), chunkInNAND)); -+ } -+ -+ if (nspare.eccres2 > 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>mtd ecc error fix performed on chunk %d:1" -+ TENDSTR), chunkInNAND)); -+ } else if (nspare.eccres2 < 0) { -+ T(YAFFS_TRACE_ERROR, -+ (TSTR -+ ("**>>mtd ecc error unfixed on chunk %d:1" -+ TENDSTR), chunkInNAND)); -+ } -+ -+ if (nspare.eccres1 || nspare.eccres2) { -+ /* 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 -+ -+/* -+ * Functions for robustisizing -+ */ -+ -+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 */ -+ -+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; -+ -+ if (!dev->useNANDECC && data) { -+ yaffs_CalcECC(data, &spare); -+ } -+ 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; -+ -+ static yaffs_Spare spareFF; -+ static int init; -+ -+ if (!init) { -+ memset(&spareFF, 0xFF, sizeof(spareFF)); -+ init = 1; -+ } -+ -+ if (yaffs_ReadChunkFromNAND -+ (dev, chunkInNAND, data, &spare, &eccResult, 1)) { -+ /* eTags may be NULL */ -+ if (eTags) { -+ -+ int deleted = -+ (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; -+ -+ eTags->chunkDeleted = deleted; -+ eTags->eccResult = eccResult; -+ eTags->blockBad = 0; /* We're reading it */ -+ /* therefore it is not a bad block */ -+ eTags->chunkUsed = -+ (memcmp(&spareFF, &spare, sizeof(spareFF)) != -+ 0) ? 1 : 0; -+ -+ if (eTags->chunkUsed) { -+ yaffs_GetTagsFromSpare(dev, &spare, &tags); -+ -+ eTags->objectId = tags.objectId; -+ eTags->chunkId = tags.chunkId; -+ eTags->byteCount = tags.byteCount; -+ eTags->serialNumber = tags.serialNumber; -+ } -+ } -+ -+ 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 = 'Y'; -+ -+ 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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_tagscompat.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagscompat.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,40 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFS_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); -+ -+void yaffs_CalcTagsECC(yaffs_Tags * tags); -+int yaffs_CheckECCOnTags(yaffs_Tags * tags); -+int yaffs_CountBits(__u8 byte); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c ---- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.c 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,28 @@ -+/* -+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+ -+#include "yaffs_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 -urN linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h ---- linux-2.6.21.1/fs/yaffs2/yaffs_tagsvalidity.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffs_tagsvalidity.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,24 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+ -+#ifndef __YAFFS_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 -urN linux-2.6.21.1/fs/yaffs2/yaffsinterface.h linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h ---- linux-2.6.21.1/fs/yaffs2/yaffsinterface.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yaffsinterface.h 2007-06-08 14:07:26.000000000 +0200 -@@ -0,0 +1,21 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+#ifndef __YAFFSINTERFACE_H__ -+#define __YAFFSINTERFACE_H__ -+ -+int yaffs_Initialise(unsigned nBlocks); -+ -+#endif -diff -urN linux-2.6.21.1/fs/yaffs2/yportenv.h linux-2.6.21.1.new/fs/yaffs2/yportenv.h ---- linux-2.6.21.1/fs/yaffs2/yportenv.h 1970-01-01 01:00:00.000000000 +0100 -+++ linux-2.6.21.1.new/fs/yaffs2/yportenv.h 2007-06-08 14:07:27.000000000 +0200 -@@ -0,0 +1,186 @@ -+/* -+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. -+ * -+ * Copyright (C) 2002-2007 Aleph One Ltd. -+ * for Toby Churchill Ltd and Brightstar Engineering -+ * -+ * Created by Charles Manning <charles@aleph1.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU Lesser General Public License version 2.1 as -+ * published by the Free Software Foundation. -+ * -+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. -+ */ -+ -+ -+#ifndef __YPORTENV_H__ -+#define __YPORTENV_H__ -+ -+#if defined CONFIG_YAFFS_WINCE -+ -+#include "ywinceenv.h" -+ -+#elif defined __KERNEL__ -+ -+#include "moduleconfig.h" -+ -+/* Linux kernel */ -+#include <linux/version.h> -+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) -+#include <linux/config.h> -+#endif -+#include <linux/kernel.h> -+#include <linux/mm.h> -+#include <linux/string.h> -+#include <linux/slab.h> -+#include <linux/vmalloc.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_strncmp(a,b,c) strncmp(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 YMALLOC_ALT(x) vmalloc(x) -+#define YFREE_ALT(x) vfree(x) -+#define YMALLOC_DMA(x) YMALLOC(x) -+ -+// KR - added for use in scan so processes aren't blocked indefinitely. -+#define YYIELD() schedule() -+ -+#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 -+ -+#define yaffs_trace(mask, fmt, args...) \ -+ do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \ -+ printk(KERN_WARNING "yaffs: " fmt, ## args); \ -+ } while (0) -+ -+#define compile_time_assertion(assertion) \ -+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) -+ -+#elif defined CONFIG_YAFFS_DIRECT -+ -+/* Direct interface */ -+#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 YMALLOC_ALT(x) malloc(x) -+#define YFREE_ALT(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 -+ -+/* see yaffs_fs.c */ -+extern unsigned int yaffs_traceMask; -+extern unsigned int yaffs_wr_attempts; -+ -+/* -+ * Tracing flags. -+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced. -+ */ -+ -+#define YAFFS_TRACE_OS 0x00000002 -+#define YAFFS_TRACE_ALLOCATE 0x00000004 -+#define YAFFS_TRACE_SCAN 0x00000008 -+#define YAFFS_TRACE_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_CHECKPOINT 0x00008000 -+ -+#define YAFFS_TRACE_VERIFY 0x00010000 -+#define YAFFS_TRACE_VERIFY_NAND 0x00020000 -+#define YAFFS_TRACE_VERIFY_FULL 0x00040000 -+#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 -+ -+ -+#define YAFFS_TRACE_ERROR 0x40000000 -+#define YAFFS_TRACE_BUG 0x80000000 -+#define YAFFS_TRACE_ALWAYS 0xF0000000 -+ -+ -+#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0) -+ -+#ifndef CONFIG_YAFFS_WINCE -+#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__)) -+#endif -+ -+#endif |