source "fs/befs/Kconfig"
source "fs/bfs/Kconfig"
source "fs/efs/Kconfig"
-
-# Patched by YAFFS
-source "fs/yaffs2/Kconfig"
-
source "fs/jffs2/Kconfig"
# UBIFS File system configuration
source "fs/ubifs/Kconfig"
obj-$(CONFIG_BTRFS_FS) += btrfs/
obj-$(CONFIG_GFS2_FS) += gfs2/
obj-$(CONFIG_EXOFS_FS) += exofs/
-
-# Patched by YAFFS
-obj-$(CONFIG_YAFFS_FS) += yaffs2/
+++ /dev/null
-#
-# YAFFS file system configurations
-#
-
-config YAFFS_FS
- tristate "YAFFS2 file system support"
- default n
- depends on MTD_BLOCK
- 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
- in yaffs_mtdif1.c.
-
- 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_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.
+++ /dev/null
-#
-# 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_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
-yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
-yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
+++ /dev/null
-/*
- * 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 of macros that would normally
- * be providesd in the Linux kernel. These macros have been written from
- * scratch but are functionally equivalent to the Linux ones.
- *
- */
-
-#ifndef __EXTRAS_H__
-#define __EXTRAS_H__
-
-
-#if !(defined __KERNEL__)
-
-/* Definition of types */
-typedef unsigned char __u8;
-typedef unsigned short __u16;
-typedef unsigned __u32;
-
-#endif
-
-/*
- * This is a simple doubly linked list implementation that matches the
- * way the Linux kernel doubly linked list implementation works.
- */
-
-struct ylist_head {
- struct ylist_head *next; /* next in chain */
- struct ylist_head *prev; /* previous in chain */
-};
-
-
-/* Initialise a static list */
-#define YLIST_HEAD(name) \
-struct ylist_head name = { &(name), &(name)}
-
-
-
-/* Initialise a list head to an empty list */
-#define YINIT_LIST_HEAD(p) \
-do { \
- (p)->next = (p);\
- (p)->prev = (p); \
-} while (0)
-
-
-/* Add an element to a list */
-static __inline__ void ylist_add(struct ylist_head *newEntry,
- struct ylist_head *list)
-{
- struct ylist_head *listNext = list->next;
-
- list->next = newEntry;
- newEntry->prev = list;
- newEntry->next = listNext;
- listNext->prev = newEntry;
-
-}
-
-static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
- struct ylist_head *list)
-{
- struct ylist_head *listPrev = list->prev;
-
- list->prev = newEntry;
- newEntry->next = list;
- newEntry->prev = listPrev;
- listPrev->next = newEntry;
-
-}
-
-
-/* Take an element out of its current list, with or without
- * reinitialising the links.of the entry*/
-static __inline__ void ylist_del(struct ylist_head *entry)
-{
- struct ylist_head *listNext = entry->next;
- struct ylist_head *listPrev = entry->prev;
-
- listNext->prev = listPrev;
- listPrev->next = listNext;
-
-}
-
-static __inline__ void ylist_del_init(struct ylist_head *entry)
-{
- ylist_del(entry);
- entry->next = entry->prev = entry;
-}
-
-
-/* Test if the list is empty */
-static __inline__ int ylist_empty(struct ylist_head *entry)
-{
- return (entry->next == entry);
-}
-
-
-/* ylist_entry takes a pointer to a list entry and offsets it to that
- * we can find a pointer to the object it is embedded in.
- */
-
-
-#define ylist_entry(entry, type, member) \
- ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
-
-
-/* ylist_for_each and list_for_each_safe iterate over lists.
- * ylist_for_each_safe uses temporary storage to make the list delete safe
- */
-
-#define ylist_for_each(itervar, list) \
- for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
-
-#define ylist_for_each_safe(itervar, saveVar, list) \
- for (itervar = (list)->next, saveVar = (list)->next->next; \
- itervar != (list); itervar = saveVar, saveVar = saveVar->next)
-
-
-#if !(defined __KERNEL__)
-
-
-#ifndef WIN32
-#include <sys/stat.h>
-#endif
-
-
-#ifdef CONFIG_YAFFS_PROVIDE_DEFS
-/* 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
-
-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;
-};
-
-#endif
-
-#else
-
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/stat.h>
-
-#endif
-
-
-#endif
+++ /dev/null
-/*
- * 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 in yaffs_mtdif1.c.
-*/
-/* 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__ */
+++ /dev/null
-/*
- * 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$";
-
-
-#include "yaffs_checkptrw.h"
-#include "yaffs_getblockinfo.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->totalBytesPerChunk);
- 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.eccResult > YAFFS_ECC_RESULT_FIXED ||
- 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);
-}
-
-
-
+++ /dev/null
-/*
- * 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
-
+++ /dev/null
-/*
- * 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$";
-
-#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;
-}
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2009 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- * Acknowledgements:
- * Luc van OostenRyck for numerous patches.
- * Nick Bane for numerous patches.
- * Nick Bane for 2.5/2.6 integration.
- * Andras Toth for mknod rdev issue.
- * Michael Fischer for finding the problem with inode inconsistency.
- * Some code bodily lifted from JFFS
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- *
- * This is the file system front-end to YAFFS that hooks it up to
- * the VFS.
- *
- * Special notes:
- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
- * this superblock
- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
- * superblock
- * >> inode->u.generic_ip points to the associated yaffs_Object.
- */
-
-const char *yaffs_fs_c_version =
- "$Id$";
-extern const char *yaffs_guts_c_version;
-
-#include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-#include <linux/config.h>
-#endif
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
-#include <linux/pagemap.h>
-#include <linux/mtd/mtd.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-
-#include "asm/div64.h"
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
-#include <linux/statfs.h> /* Added NCB 15-8-2003 */
-#include <linux/statfs.h>
-#define UnlockPage(p) unlock_page(p)
-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-
-/* FIXME: use sb->s_id instead ? */
-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-
-#else
-
-#include <linux/locks.h>
-#define BDEVNAME_SIZE 0
-#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-#define __user
-#endif
-
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-#define YPROC_ROOT (&proc_root)
-#else
-#define YPROC_ROOT NULL
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
-#else
-#define WRITE_SIZE_STR "oobblock"
-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-#define YAFFS_USE_WRITE_BEGIN_END 1
-#else
-#define YAFFS_USE_WRITE_BEGIN_END 0
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-{
- uint64_t result = partition_size;
- do_div(result, block_size);
- return (uint32_t)result;
-}
-#else
-#define YCALCBLOCKS(s, b) ((s)/(b))
-#endif
-
-#include <linux/uaccess.h>
-
-#include "yportenv.h"
-#include "yaffs_guts.h"
-
-#include <linux/mtd/mtd.h>
-#include "yaffs_mtdif.h"
-#include "yaffs_mtdif1.h"
-#include "yaffs_mtdif2.h"
-
-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-unsigned int yaffs_auto_checkpoint = 1;
-
-/* Module Parameters */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-module_param(yaffs_traceMask, uint, 0644);
-module_param(yaffs_wr_attempts, uint, 0644);
-module_param(yaffs_auto_checkpoint, uint, 0644);
-#else
-MODULE_PARM(yaffs_traceMask, "i");
-MODULE_PARM(yaffs_wr_attempts, "i");
-MODULE_PARM(yaffs_auto_checkpoint, "i");
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-/* use iget and read_inode */
-#define Y_IGET(sb, inum) iget((sb), (inum))
-static void yaffs_read_inode(struct inode *inode);
-
-#else
-/* Call local equivalent */
-#define YAFFS_USE_OWN_IGET
-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
-#endif
-
-/*#define T(x) printk x */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
-#else
-#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
-#endif
-
-#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
-#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
-#else
-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
-#endif
-
-static void yaffs_put_super(struct super_block *sb);
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos);
-static ssize_t yaffs_hold_space(struct file *f);
-static void yaffs_release_space(struct file *f);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id);
-#else
-static int yaffs_file_flush(struct file *file);
-#endif
-
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync);
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n);
-#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
-#endif
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry);
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname);
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t dev);
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int dev);
-#endif
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry);
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait);
-static void yaffs_write_super(struct super_block *sb);
-#else
-static int yaffs_sync_fs(struct super_block *sb);
-static int yaffs_write_super(struct super_block *sb);
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
-#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
-#endif
-
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
-#endif
-
-static void yaffs_delete_inode(struct inode *);
-static void yaffs_clear_inode(struct inode *);
-
-static int yaffs_readpage(struct file *file, struct page *page);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
-#else
-static int yaffs_writepage(struct page *page);
-#endif
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata);
-#else
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to);
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to);
-
-#endif
-
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#endif
-
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
-#else
- .prepare_write = yaffs_prepare_write,
- .commit_write = yaffs_commit_write,
-#endif
-};
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .llseek = generic_file_llseek,
-};
-
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .sendfile = generic_file_sendfile,
-};
-
-#else
-
-static const struct file_operations yaffs_file_operations = {
- .read = generic_file_read,
- .write = generic_file_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- .sendfile = generic_file_sendfile,
-#endif
-};
-#endif
-
-static const struct inode_operations yaffs_file_inode_operations = {
- .setattr = yaffs_setattr,
-};
-
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
- .setattr = yaffs_setattr,
-};
-
-static const struct inode_operations yaffs_dir_inode_operations = {
- .create = yaffs_create,
- .lookup = yaffs_lookup,
- .link = yaffs_link,
- .unlink = yaffs_unlink,
- .symlink = yaffs_symlink,
- .mkdir = yaffs_mkdir,
- .rmdir = yaffs_unlink,
- .mknod = yaffs_mknod,
- .rename = yaffs_rename,
- .setattr = yaffs_setattr,
-};
-
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
-};
-
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
-
-#ifndef YAFFS_USE_OWN_IGET
- .read_inode = yaffs_read_inode,
-#endif
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
- .delete_inode = yaffs_delete_inode,
- .clear_inode = yaffs_clear_inode,
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
-
-static void yaffs_GrossLock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
- down(&dev->grossLock);
- T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
-}
-
-static void yaffs_GrossUnlock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
- up(&dev->grossLock);
-}
-
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
-{
- unsigned char *alias;
- int ret;
-
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
-
- yaffs_GrossLock(dev);
-
- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
-
- yaffs_GrossUnlock(dev);
-
- if (!alias)
- return -ENOMEM;
-
- ret = vfs_readlink(dentry, buffer, buflen, alias);
- kfree(alias);
- return ret;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-#endif
-{
- unsigned char *alias;
- int ret;
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
-
- yaffs_GrossLock(dev);
-
- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
-
- yaffs_GrossUnlock(dev);
-
- if (!alias) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = vfs_follow_link(nd, alias);
- kfree(alias);
-out:
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- return ERR_PTR(ret);
-#else
- return ret;
-#endif
-}
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_Object *obj);
-
-/*
- * Lookup is used to find objects in the fs
- */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n)
-#else
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-#endif
-{
- yaffs_Object *obj;
- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-
- yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_lookup for %d:%s\n",
- yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
-
- obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
- dentry->d_name.name);
-
- obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
-
- /* Can't hold gross lock when calling yaffs_get_inode() */
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- T(YAFFS_TRACE_OS,
- ("yaffs_lookup found %d\n", obj->objectId));
-
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-
- if (inode) {
- T(YAFFS_TRACE_OS,
- ("yaffs_loookup dentry \n"));
-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
- * d_add even if NULL inode */
-#if 0
- /*dget(dentry); // try to solve directory bug */
- d_add(dentry, inode);
-
- /* return dentry; */
- return NULL;
-#endif
- }
-
- } else {
- T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
-
- }
-
-/* added NCB for 2.5/6 compatability - forces add even if inode is
- * NULL which creates dentry hash */
- d_add(dentry, inode);
-
- return NULL;
-}
-
-
-#ifdef YAFFS_HAS_PUT_INODE
-
-/* For now put inode is just for debugging
- * Put inode is called when the inode **structure** is put.
- */
-static void yaffs_put_inode(struct inode *inode)
-{
- T(YAFFS_TRACE_OS,
- ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
- atomic_read(&inode->i_count)));
-
-}
-#endif
-
-/* clear is called to tell the fs to release any per-inode data it holds */
-static void yaffs_clear_inode(struct inode *inode)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
-
- if (obj) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
-
- /* Clear the association between the inode and
- * the yaffs_Object.
- */
- obj->myInode = NULL;
- yaffs_InodeToObjectLV(inode) = NULL;
-
- /* If the object freeing was deferred, then the real
- * free happens now.
- * This should fix the inode inconsistency problem.
- */
-
- yaffs_HandleDeferedFree(obj);
-
- yaffs_GrossUnlock(dev);
- }
-
-}
-
-/* delete is called when the link count is zero and the inode
- * is put (ie. nobody wants to know about it anymore, time to
- * delete the file).
- * NB Must call clear_inode()
- */
-static void yaffs_delete_inode(struct inode *inode)
-{
- yaffs_Object *obj = yaffs_InodeToObject(inode);
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
-
- if (obj) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- yaffs_DeleteObject(obj);
- yaffs_GrossUnlock(dev);
- }
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- truncate_inode_pages(&inode->i_data, 0);
-#endif
- clear_inode(inode);
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id)
-#else
-static int yaffs_file_flush(struct file *file)
-#endif
-{
- yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
-
- yaffs_Device *dev = obj->myDev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_flush object %d (%s)\n", obj->objectId,
- obj->dirty ? "dirty" : "clean"));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushFile(obj, 1);
-
- yaffs_GrossUnlock(dev);
-
- return 0;
-}
-
-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-{
- /* Lifted from jffs2 */
-
- yaffs_Object *obj;
- unsigned char *pg_buf;
- int ret;
-
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
- (unsigned)PAGE_CACHE_SIZE));
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- BUG_ON(!PageLocked(pg));
-#else
- if (!PageLocked(pg))
- PAGE_BUG(pg);
-#endif
-
- pg_buf = kmap(pg);
- /* FIXME: Can kmap fail? */
-
- yaffs_GrossLock(dev);
-
- ret = yaffs_ReadDataFromFile(obj, pg_buf,
- pg->index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE);
-
- yaffs_GrossUnlock(dev);
-
- if (ret >= 0)
- ret = 0;
-
- if (ret) {
- ClearPageUptodate(pg);
- SetPageError(pg);
- } else {
- SetPageUptodate(pg);
- ClearPageError(pg);
- }
-
- flush_dcache_page(pg);
- kunmap(pg);
-
- T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
- return ret;
-}
-
-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-{
- int ret = yaffs_readpage_nolock(f, pg);
- UnlockPage(pg);
- return ret;
-}
-
-static int yaffs_readpage(struct file *f, struct page *pg)
-{
- return yaffs_readpage_unlock(f, pg);
-}
-
-/* writepage inspired by/stolen from smbfs */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-#else
-static int yaffs_writepage(struct page *page)
-#endif
-{
- struct address_space *mapping = page->mapping;
- loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
- struct inode *inode;
- unsigned long end_index;
- char *buffer;
- yaffs_Object *obj;
- int nWritten = 0;
- unsigned nBytes;
-
- if (!mapping)
- BUG();
- inode = mapping->host;
- if (!inode)
- BUG();
-
- if (offset > inode->i_size) {
- T(YAFFS_TRACE_OS,
- ("yaffs_writepage at %08x, inode size = %08x!!!\n",
- (unsigned)(page->index << PAGE_CACHE_SHIFT),
- (unsigned)inode->i_size));
- T(YAFFS_TRACE_OS,
- (" -> don't care!!\n"));
- unlock_page(page);
- return 0;
- }
-
- end_index = inode->i_size >> PAGE_CACHE_SHIFT;
-
- /* easy case */
- if (page->index < end_index)
- nBytes = PAGE_CACHE_SIZE;
- else
- nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
-
- get_page(page);
-
- buffer = kmap(page);
-
- obj = yaffs_InodeToObject(inode);
- yaffs_GrossLock(obj->myDev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_writepage at %08x, size %08x\n",
- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
- T(YAFFS_TRACE_OS,
- ("writepag0: obj = %05x, ino = %05x\n",
- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
-
- nWritten = yaffs_WriteDataToFile(obj, buffer,
- page->index << PAGE_CACHE_SHIFT, nBytes, 0);
-
- T(YAFFS_TRACE_OS,
- ("writepag1: obj = %05x, ino = %05x\n",
- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
-
- yaffs_GrossUnlock(obj->myDev);
-
- kunmap(page);
- SetPageUptodate(page);
- UnlockPage(page);
- put_page(page);
-
- return (nWritten == nBytes) ? 0 : -ENOSPC;
-}
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
-{
- struct page *pg = NULL;
- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
- uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
- uint32_t to = offset + len;
-
- int ret = 0;
- int space_held = 0;
-
- T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
- /* Get a page */
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
- pg = grab_cache_page_write_begin(mapping, index, flags);
-#else
- pg = __grab_cache_page(mapping, index);
-#endif
-
- *pagep = pg;
- if (!pg) {
- ret = -ENOMEM;
- goto out;
- }
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
-
- if (!space_held) {
- ret = -ENOSPC;
- goto out;
- }
-
- /* Update page if required */
-
- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
- ret = yaffs_readpage_nolock(filp, pg);
-
- if (ret)
- goto out;
-
- /* Happy path return */
- T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
-
- return 0;
-
-out:
- T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
- if (space_held)
- yaffs_release_space(filp);
- if (pg) {
- unlock_page(pg);
- page_cache_release(pg);
- }
- return ret;
-}
-
-#else
-
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to)
-{
- T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
-
- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
- return yaffs_readpage_nolock(f, pg);
- return 0;
-}
-#endif
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata)
-{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-
- kva = kmap(pg);
- addr = kva + offset_into_page;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end addr %x pos %x nBytes %d\n",
- (unsigned) addr,
- (int)pos, copied));
-
- ret = yaffs_file_write(filp, addr, copied, &pos);
-
- if (ret != copied) {
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end not same size ret %d copied %d\n",
- ret, copied));
- SetPageError(pg);
- ClearPageUptodate(pg);
- } else {
- SetPageUptodate(pg);
- }
-
- kunmap(pg);
-
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
- return ret;
-}
-#else
-
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to)
-{
- void *addr, *kva;
-
- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
- int nBytes = to - offset;
- int nWritten;
-
- unsigned spos = pos;
- unsigned saddr;
-
- kva = kmap(pg);
- addr = kva + offset;
-
- saddr = (unsigned) addr;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write addr %x pos %x nBytes %d\n",
- saddr, spos, nBytes));
-
- nWritten = yaffs_file_write(f, addr, nBytes, &pos);
-
- if (nWritten != nBytes) {
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
- nWritten, nBytes));
- SetPageError(pg);
- ClearPageUptodate(pg);
- } else {
- SetPageUptodate(pg);
- }
-
- kunmap(pg);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write returning %d\n",
- nWritten == nBytes ? 0 : nWritten));
-
- return nWritten == nBytes ? 0 : nWritten;
-}
-#endif
-
-
-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
-{
- if (inode && obj) {
-
-
- /* Check mode against the variant type and attempt to repair if broken. */
- __u32 mode = obj->yst_mode;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- if (!S_ISREG(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFREG;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (!S_ISLNK(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFLNK;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- if (!S_ISDIR(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFDIR;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- default:
- /* TODO? */
- break;
- }
-
- inode->i_flags |= S_NOATIME;
-
- inode->i_ino = obj->objectId;
- inode->i_mode = obj->yst_mode;
- inode->i_uid = obj->yst_uid;
- inode->i_gid = obj->yst_gid;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
- inode->i_blksize = inode->i_sb->s_blocksize;
-#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
- inode->i_rdev = old_decode_dev(obj->yst_rdev);
- inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
- inode->i_atime.tv_nsec = 0;
- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
- inode->i_mtime.tv_nsec = 0;
- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
- inode->i_ctime.tv_nsec = 0;
-#else
- inode->i_rdev = obj->yst_rdev;
- inode->i_atime = obj->yst_atime;
- inode->i_mtime = obj->yst_mtime;
- inode->i_ctime = obj->yst_ctime;
-#endif
- inode->i_size = yaffs_GetObjectFileLength(obj);
- inode->i_blocks = (inode->i_size + 511) >> 9;
-
- inode->i_nlink = yaffs_GetObjectLinkCount(obj);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
- inode->i_mode, inode->i_uid, inode->i_gid,
- (int)inode->i_size, atomic_read(&inode->i_count)));
-
- switch (obj->yst_mode & S_IFMT) {
- default: /* fifo, device or socket */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- init_special_inode(inode, obj->yst_mode,
- old_decode_dev(obj->yst_rdev));
-#else
- init_special_inode(inode, obj->yst_mode,
- (dev_t) (obj->yst_rdev));
-#endif
- break;
- case S_IFREG: /* file */
- inode->i_op = &yaffs_file_inode_operations;
- inode->i_fop = &yaffs_file_operations;
- inode->i_mapping->a_ops =
- &yaffs_file_address_operations;
- break;
- case S_IFDIR: /* directory */
- inode->i_op = &yaffs_dir_inode_operations;
- inode->i_fop = &yaffs_dir_operations;
- break;
- case S_IFLNK: /* symlink */
- inode->i_op = &yaffs_symlink_inode_operations;
- break;
- }
-
- yaffs_InodeToObjectLV(inode) = obj;
-
- obj->myInode = inode;
-
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_FileInode invalid parameters\n"));
- }
-
-}
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_Object *obj)
-{
- struct inode *inode;
-
- if (!sb) {
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for NULL super_block!!\n"));
- return NULL;
-
- }
-
- if (!obj) {
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for NULL object!!\n"));
- return NULL;
-
- }
-
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for object %d\n", obj->objectId));
-
- inode = Y_IGET(sb, obj->objectId);
- if (IS_ERR(inode))
- return NULL;
-
- /* NB Side effect: iget calls back to yaffs_read_inode(). */
- /* iget also increments the inode's i_count */
- /* NB You can't be holding grossLock or deadlock will happen! */
-
- return inode;
-}
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos)
-{
- yaffs_Object *obj;
- int nWritten, ipos;
- struct inode *inode;
- yaffs_Device *dev;
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- inode = f->f_dentry->d_inode;
-
- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
- ipos = inode->i_size;
- else
- ipos = *pos;
-
- if (!obj)
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write: hey obj is null!\n"));
- else
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write about to write writing %zu bytes"
- "to object %d at %d\n",
- n, obj->objectId, ipos));
-
- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write writing %zu bytes, %d written at %d\n",
- n, nWritten, ipos));
-
- if (nWritten > 0) {
- ipos += nWritten;
- *pos = ipos;
- if (ipos > inode->i_size) {
- inode->i_size = ipos;
- inode->i_blocks = (ipos + 511) >> 9;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write size updated to %d bytes, "
- "%d blocks\n",
- ipos, (int)(inode->i_blocks)));
- }
-
- }
- yaffs_GrossUnlock(dev);
- return nWritten == 0 ? -ENOSPC : nWritten;
-}
-
-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-/* For now we just assume few parallel writes and check against a small number. */
-/* Todo: need to do this with a counter to handle parallel reads better */
-
-static ssize_t yaffs_hold_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- int nFreeChunks;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
-
- yaffs_GrossUnlock(dev);
-
- return (nFreeChunks > 20) ? 1 : 0;
-}
-
-static void yaffs_release_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
-
- yaffs_GrossUnlock(dev);
-}
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- struct inode *inode = f->f_dentry->d_inode;
- unsigned long offset, curoffs;
- struct ylist_head *i;
- yaffs_Object *l;
-
- char name[YAFFS_MAX_NAME_LENGTH + 1];
-
- obj = yaffs_DentryToObject(f->f_dentry);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- offset = f->f_pos;
-
- T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
-
- if (offset == 0) {
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: entry . ino %d \n",
- (int)inode->i_ino));
- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
- goto out;
- offset++;
- f->f_pos++;
- }
- if (offset == 1) {
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: entry .. ino %d \n",
- (int)f->f_dentry->d_parent->d_inode->i_ino));
- if (filldir(dirent, "..", 2, offset,
- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
- goto out;
- offset++;
- f->f_pos++;
- }
-
- curoffs = 1;
-
- /* If the directory has changed since the open or last call to
- readdir, rewind to after the 2 canned entries. */
-
- if (f->f_version != inode->i_version) {
- offset = 2;
- f->f_pos = offset;
- f->f_version = inode->i_version;
- }
-
- ylist_for_each(i, &obj->variant.directoryVariant.children) {
- curoffs++;
- if (curoffs >= offset) {
- l = ylist_entry(i, yaffs_Object, siblings);
-
- yaffs_GetObjectName(l, name,
- YAFFS_MAX_NAME_LENGTH + 1);
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: %s inode %d\n", name,
- yaffs_GetObjectInode(l)));
-
- if (filldir(dirent,
- name,
- strlen(name),
- offset,
- yaffs_GetObjectInode(l),
- yaffs_GetObjectType(l)) < 0)
- goto up_and_out;
-
- offset++;
- f->f_pos++;
- }
- }
-
-up_and_out:
-out:
- yaffs_GrossUnlock(dev);
-
- return 0;
-}
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-#define YCRED(x) x
-#else
-#define YCRED(x) (x->cred)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t rdev)
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int rdev)
-#endif
-{
- struct inode *inode;
-
- yaffs_Object *obj = NULL;
- yaffs_Device *dev;
-
- yaffs_Object *parent = yaffs_InodeToObject(dir);
-
- int error = -ENOSPC;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
- mode |= S_ISGID;
-
- if (parent) {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: parent object %d type %d\n",
- parent->objectId, parent->variantType));
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: could not get parent object\n"));
- return -EPERM;
- }
-
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
- "mode %x dev %x\n",
- dentry->d_name.name, mode, rdev));
-
- dev = parent->myDev;
-
- yaffs_GrossLock(dev);
-
- switch (mode & S_IFMT) {
- default:
- /* Special (socket, fifo, device...) */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
- gid, old_encode_dev(rdev));
-#else
- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
- gid, rdev);
-#endif
- break;
- case S_IFREG: /* file */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
- obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
- gid);
- break;
- case S_IFDIR: /* directory */
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: making directory\n"));
- obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
- uid, gid);
- break;
- case S_IFLNK: /* symlink */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
- obj = NULL; /* Do we ever get here? */
- break;
- }
-
- /* Can not call yaffs_get_inode() with gross lock held */
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
- d_instantiate(dentry, inode);
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod created object %d count = %d\n",
- obj->objectId, atomic_read(&inode->i_count)));
- error = 0;
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod failed making object\n"));
- error = -ENOMEM;
- }
-
- return error;
-}
-
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
- int retVal;
- T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
- return retVal;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n)
-#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-#endif
-{
- T(YAFFS_TRACE_OS, ("yaffs_create\n"));
- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-}
-
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-{
- int retVal;
-
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
- dentry->d_name.name));
-
- dev = yaffs_InodeToObject(dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
-
- if (retVal == YAFFS_OK) {
- dentry->d_inode->i_nlink--;
- dir->i_version++;
- yaffs_GrossUnlock(dev);
- mark_inode_dirty(dentry->d_inode);
- return 0;
- }
- yaffs_GrossUnlock(dev);
- return -ENOTEMPTY;
-}
-
-/*
- * Create a link...
- */
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode = old_dentry->d_inode;
- yaffs_Object *obj = NULL;
- yaffs_Object *link = NULL;
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS, ("yaffs_link\n"));
-
- obj = yaffs_InodeToObject(inode);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
- link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
- obj);
-
- if (link) {
- old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
- d_instantiate(dentry, old_dentry->d_inode);
- atomic_inc(&old_dentry->d_inode->i_count);
- T(YAFFS_TRACE_OS,
- ("yaffs_link link count %d i_count %d\n",
- old_dentry->d_inode->i_nlink,
- atomic_read(&old_dentry->d_inode->i_count)));
- }
-
- yaffs_GrossUnlock(dev);
-
- if (link)
- return 0;
-
- return -EPERM;
-}
-
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
-
- dev = yaffs_InodeToObject(dir)->myDev;
- yaffs_GrossLock(dev);
- obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
- S_IFLNK | S_IRWXUGO, uid, gid, symname);
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- struct inode *inode;
-
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
- d_instantiate(dentry, inode);
- T(YAFFS_TRACE_OS, ("symlink created OK\n"));
- return 0;
- } else {
- T(YAFFS_TRACE_OS, ("symlink not created\n"));
- }
-
- return -ENOMEM;
-}
-
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync)
-{
-
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- obj = yaffs_DentryToObject(dentry);
-
- dev = obj->myDev;
-
- T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
- yaffs_GrossLock(dev);
- yaffs_FlushFile(obj, 1);
- yaffs_GrossUnlock(dev);
- return 0;
-}
-
-/*
- * The VFS layer already does all the dentry stuff for rename.
- *
- * NB: POSIX says you can rename an object over an old object of the same name
- */
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- yaffs_Device *dev;
- int retVal = YAFFS_FAIL;
- yaffs_Object *target;
-
- T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
- dev = yaffs_InodeToObject(old_dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- /* Check if the target is an existing directory that is not empty. */
- target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
- new_dentry->d_name.name);
-
-
-
- if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_empty(&target->variant.directoryVariant.children)) {
-
- T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
-
- retVal = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
-
- retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
- old_dentry->d_name.name,
- yaffs_InodeToObject(new_dir),
- new_dentry->d_name.name);
- }
- yaffs_GrossUnlock(dev);
-
- if (retVal == YAFFS_OK) {
- if (target) {
- new_dentry->d_inode->i_nlink--;
- mark_inode_dirty(new_dentry->d_inode);
- }
-
- return 0;
- } else {
- return -ENOTEMPTY;
- }
-}
-
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- int error;
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_setattr of object %d\n",
- yaffs_InodeToObject(inode)->objectId));
-
- error = inode_change_ok(inode, attr);
- if (error == 0) {
- dev = yaffs_InodeToObject(inode)->myDev;
- yaffs_GrossLock(dev);
- if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
- YAFFS_OK) {
- error = 0;
- } else {
- error = -EPERM;
- }
- yaffs_GrossUnlock(dev);
- if (!error)
- error = inode_setattr(inode, attr);
- }
- return error;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
- struct super_block *sb = dentry->d_sb;
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-#endif
-
- T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
-
- yaffs_GrossLock(dev);
-
- buf->f_type = YAFFS_MAGIC;
- buf->f_bsize = sb->s_blocksize;
- buf->f_namelen = 255;
-
- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
- /* Do this if chunk size is not a power of 2 */
-
- uint64_t bytesInDev;
- uint64_t bytesFree;
-
- bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
- ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
-
- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
- buf->f_blocks = bytesInDev;
-
- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
- ((uint64_t)(dev->nDataBytesPerChunk));
-
- do_div(bytesFree, sb->s_blocksize);
-
- buf->f_bfree = bytesFree;
-
- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
-
- buf->f_blocks =
- (dev->endBlock - dev->startBlock + 1) *
- dev->nChunksPerBlock /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- buf->f_bfree =
- yaffs_GetNumberOfFreeChunks(dev) /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- } else {
- buf->f_blocks =
- (dev->endBlock - dev->startBlock + 1) *
- dev->nChunksPerBlock *
- (dev->nDataBytesPerChunk / sb->s_blocksize);
-
- buf->f_bfree =
- yaffs_GetNumberOfFreeChunks(dev) *
- (dev->nDataBytesPerChunk / sb->s_blocksize);
- }
-
- buf->f_files = 0;
- buf->f_ffree = 0;
- buf->f_bavail = buf->f_bfree;
-
- yaffs_GrossUnlock(dev);
- return 0;
-}
-
-
-static int yaffs_do_sync_fs(struct super_block *sb)
-{
-
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
- T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
-
- if (sb->s_dirt) {
- yaffs_GrossLock(dev);
-
- if (dev) {
- yaffs_FlushEntireDeviceCache(dev);
- yaffs_CheckpointSave(dev);
- }
-
- yaffs_GrossUnlock(dev);
-
- sb->s_dirt = 0;
- }
- return 0;
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static void yaffs_write_super(struct super_block *sb)
-#else
-static int yaffs_write_super(struct super_block *sb)
-#endif
-{
-
- T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
- if (yaffs_auto_checkpoint >= 2)
- yaffs_do_sync_fs(sb);
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
- return 0;
-#endif
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait)
-#else
-static int yaffs_sync_fs(struct super_block *sb)
-#endif
-{
- T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
-
- if (yaffs_auto_checkpoint >= 1)
- yaffs_do_sync_fs(sb);
-
- return 0;
-}
-
-#ifdef YAFFS_USE_OWN_IGET
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- yaffs_Object *obj;
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_iget for %lu\n", ino));
-
- inode = iget_locked(sb, ino);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return inode;
-
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- yaffs_GrossUnlock(dev);
-
- unlock_new_inode(inode);
- return inode;
-}
-
-#else
-
-static void yaffs_read_inode(struct inode *inode)
-{
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_Object *obj;
- yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_read_inode for %d\n", (int)inode->i_ino));
-
- yaffs_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- yaffs_GrossUnlock(dev);
-}
-
-#endif
-
-static YLIST_HEAD(yaffs_dev_list);
-
-#if 0 /* not used */
-static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- if (*flags & MS_RDONLY) {
- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_remount_fs: %s: RO\n", dev->name));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushEntireDeviceCache(dev);
-
- yaffs_CheckpointSave(dev);
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- yaffs_GrossUnlock(dev);
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_remount_fs: %s: RW\n", dev->name));
- }
-
- return 0;
-}
-#endif
-
-static void yaffs_put_super(struct super_block *sb)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushEntireDeviceCache(dev);
-
- yaffs_CheckpointSave(dev);
-
- if (dev->putSuperFunc)
- dev->putSuperFunc(sb);
-
- yaffs_Deinitialise(dev);
-
- yaffs_GrossUnlock(dev);
-
- /* we assume this is protected by lock_kernel() in mount/umount */
- ylist_del(&dev->devList);
-
- if (dev->spareBuffer) {
- YFREE(dev->spareBuffer);
- dev->spareBuffer = NULL;
- }
-
- kfree(dev);
-}
-
-
-static void yaffs_MTDPutSuper(struct super_block *sb)
-{
- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- put_mtd_device(mtd);
-}
-
-
-static void yaffs_MarkSuperBlockDirty(void *vsb)
-{
- struct super_block *sb = (struct super_block *)vsb;
-
- T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
- if (sb)
- sb->s_dirt = 1;
-}
-
-typedef struct {
- int inband_tags;
- int skip_checkpoint_read;
- int skip_checkpoint_write;
- int no_cache;
-} yaffs_options;
-
-#define MAX_OPT_LEN 20
-static int yaffs_parse_options(yaffs_options *options, const char *options_str)
-{
- char cur_opt[MAX_OPT_LEN + 1];
- int p;
- int error = 0;
-
- /* Parse through the options which is a comma seperated list */
-
- while (options_str && *options_str && !error) {
- memset(cur_opt, 0, MAX_OPT_LEN + 1);
- p = 0;
-
- while (*options_str && *options_str != ',') {
- if (p < MAX_OPT_LEN) {
- cur_opt[p] = *options_str;
- p++;
- }
- options_str++;
- }
-
- if (!strcmp(cur_opt, "inband-tags"))
- options->inband_tags = 1;
- else if (!strcmp(cur_opt, "no-cache"))
- options->no_cache = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-read"))
- options->skip_checkpoint_read = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-write"))
- options->skip_checkpoint_write = 1;
- else if (!strcmp(cur_opt, "no-checkpoint")) {
- options->skip_checkpoint_read = 1;
- options->skip_checkpoint_write = 1;
- } else {
- printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
- cur_opt);
- error = 1;
- }
- }
-
- return error;
-}
-
-static struct super_block *yaffs_internal_read_super(int yaffsVersion,
- struct super_block *sb,
- void *data, int silent)
-{
- int nBlocks;
- struct inode *inode = NULL;
- struct dentry *root;
- yaffs_Device *dev = 0;
- char devname_buf[BDEVNAME_SIZE + 1];
- struct mtd_info *mtd;
- int err;
- char *data_str = (char *)data;
-
- yaffs_options options;
-
- sb->s_magic = YAFFS_MAGIC;
- sb->s_op = &yaffs_super_ops;
- sb->s_flags |= MS_NOATIME;
-
- if (!sb)
- printk(KERN_INFO "yaffs: sb is NULL\n");
- else if (!sb->s_dev)
- printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
- else if (!yaffs_devname(sb, devname_buf))
- printk(KERN_INFO "yaffs: devname is NULL\n");
- else
- printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
- sb->s_dev,
- yaffs_devname(sb, devname_buf));
-
- if (!data_str)
- data_str = "";
-
- printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-
- memset(&options, 0, sizeof(options));
-
- if (yaffs_parse_options(&options, data_str)) {
- /* Option parsing failed */
- return NULL;
- }
-
-
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
- T(YAFFS_TRACE_OS,
- ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
-
-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
- T(YAFFS_TRACE_OS,
- ("yaffs: Write verification disabled. All guarantees "
- "null and void\n"));
-#endif
-
- T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
- "\"%s\"\n",
- MAJOR(sb->s_dev), MINOR(sb->s_dev),
- yaffs_devname(sb, devname_buf)));
-
- /* Check it's an mtd device..... */
- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
- return NULL; /* This isn't an mtd device */
-
- /* Get the device */
- mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
- if (!mtd) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device #%u doesn't appear to exist\n",
- MINOR(sb->s_dev)));
- return NULL;
- }
- /* Check it's NAND */
- if (mtd->type != MTD_NANDFLASH) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
- return NULL;
- }
-
- T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
- T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
- T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
- T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
- T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
- T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
- T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
- T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
- T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
- T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
- T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
-#else
- T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
-#endif
-
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
- yaffsVersion = 2;
- }
-
- /* Added NCB 26/5/2006 for completeness */
- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
- yaffsVersion = 1;
- }
-
-#endif
-
- if (yaffsVersion == 2) {
- /* Check for version 2 style functions */
- if (!mtd->erase ||
- !mtd->block_isbad ||
- !mtd->block_markbad ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support required "
- "functions\n"));;
- return NULL;
- }
-
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
- !options.inband_tags) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not have the "
- "right page sizes\n"));
- return NULL;
- }
- } else {
- /* Check for V1 style functions */
- if (!mtd->erase ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support required "
- "functions\n"));;
- return NULL;
- }
-
- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
- mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support have the "
- "right page sizes\n"));
- return NULL;
- }
- }
-
- /* OK, so if we got here, we have an MTD that's NAND and looks
- * like it has the right capabilities
- * Set the yaffs_Device up for mtd
- */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
-#else
- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
-#endif
- if (!dev) {
- /* Deep shit could not allocate device structure */
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs_read_super: Failed trying to allocate "
- "yaffs_Device. \n"));
- return NULL;
- }
-
- memset(dev, 0, sizeof(yaffs_Device));
- dev->genericDevice = mtd;
- dev->name = mtd->name;
-
- /* Set up the memory size parameters.... */
-
- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
-
- dev->startBlock = 0;
- dev->endBlock = nBlocks - 1;
- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
- dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
- dev->nReservedBlocks = 5;
- dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
- dev->inbandTags = options.inband_tags;
-
- /* ... and the functions. */
- if (yaffsVersion == 2) {
- dev->writeChunkWithTagsToNAND =
- nandmtd2_WriteChunkWithTagsToNAND;
- dev->readChunkWithTagsFromNAND =
- nandmtd2_ReadChunkWithTagsFromNAND;
- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
- dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
- dev->spareBuffer = YMALLOC(mtd->oobsize);
- dev->isYaffs2 = 1;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- dev->totalBytesPerChunk = mtd->writesize;
- dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
-#else
- dev->totalBytesPerChunk = mtd->oobblock;
- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
-#endif
- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-
- dev->startBlock = 0;
- dev->endBlock = nBlocks - 1;
- } else {
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- /* use the MTD interface in yaffs_mtdif1.c */
- dev->writeChunkWithTagsToNAND =
- nandmtd1_WriteChunkWithTagsToNAND;
- dev->readChunkWithTagsFromNAND =
- nandmtd1_ReadChunkWithTagsFromNAND;
- dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
- dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
-#else
- dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
- dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
-#endif
- dev->isYaffs2 = 0;
- }
- /* ... and common functions */
- dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
- dev->initialiseNAND = nandmtd_InitialiseNAND;
-
- dev->putSuperFunc = yaffs_MTDPutSuper;
-
- dev->superBlock = (void *)sb;
- dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
-
-
-#ifndef CONFIG_YAFFS_DOES_ECC
- dev->useNANDECC = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
- dev->wideTnodesDisabled = 1;
-#endif
-
- dev->skipCheckpointRead = options.skip_checkpoint_read;
- dev->skipCheckpointWrite = options.skip_checkpoint_write;
-
- /* we assume this is protected by lock_kernel() in mount/umount */
- ylist_add_tail(&dev->devList, &yaffs_dev_list);
-
- init_MUTEX(&dev->grossLock);
-
- yaffs_GrossLock(dev);
-
- err = yaffs_GutsInitialise(dev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_read_super: guts initialised %s\n",
- (err == YAFFS_OK) ? "OK" : "FAILED"));
-
- /* Release lock before yaffs_get_inode() */
- yaffs_GrossUnlock(dev);
-
- /* Create root inode */
- if (err == YAFFS_OK)
- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
- yaffs_Root(dev));
-
- if (!inode)
- return NULL;
-
- inode->i_op = &yaffs_dir_inode_operations;
- inode->i_fop = &yaffs_dir_operations;
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
-
- root = d_alloc_root(inode);
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
-
- if (!root) {
- iput(inode);
- return NULL;
- }
- sb->s_root = root;
- sb->s_dirt = !dev->isCheckpointed;
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
- return sb;
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data, struct vfsmount *mnt)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs_internal_read_super_mtd, mnt);
-}
-#else
-static struct super_block *yaffs_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs_internal_read_super_mtd);
-}
-#endif
-
-static struct file_system_type yaffs_fs_type = {
- .owner = THIS_MODULE,
- .name = "yaffs",
- .get_sb = yaffs_read_super,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-#else
-static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(1, sb, data, silent);
-}
-
-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
- FS_REQUIRES_DEV);
-#endif
-
-
-#ifdef CONFIG_YAFFS_YAFFS2
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
-{
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd, mnt);
-}
-#else
-static struct super_block *yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd);
-}
-#endif
-
-static struct file_system_type yaffs2_fs_type = {
- .owner = THIS_MODULE,
- .name = "yaffs2",
- .get_sb = yaffs2_read_super,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-#else
-static struct super_block *yaffs2_read_super(struct super_block *sb,
- void *data, int silent)
-{
- return yaffs_internal_read_super(2, sb, data, silent);
-}
-
-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
- FS_REQUIRES_DEV);
-#endif
-
-#endif /* CONFIG_YAFFS_YAFFS2 */
-
-static struct proc_dir_entry *my_proc_entry;
-
-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
-{
- buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
- buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
- buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
- buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
- buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
- buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
- buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
- buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
- buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
- buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
- buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
- buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
- buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
- buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
- buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
- buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
- buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
- buf += sprintf(buf, "passiveGCs......... %d\n",
- dev->passiveGarbageCollections);
- buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
- buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
- buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
- buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
- buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
- buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
- buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
- buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
- buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
- buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
- buf +=
- sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
- buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
- buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
- buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
-
- return buf;
-}
-
-static int yaffs_proc_read(char *page,
- char **start,
- off_t offset, int count, int *eof, void *data)
-{
- struct ylist_head *item;
- char *buf = page;
- int step = offset;
- int n = 0;
-
- /* Get proc_file_read() to step 'offset' by one on each sucessive call.
- * We use 'offset' (*ppos) to indicate where we are in devList.
- * This also assumes the user has posted a read buffer large
- * enough to hold the complete output; but that's life in /proc.
- */
-
- *(int *)start = 1;
-
- /* Print header first */
- if (step == 0) {
- buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
- "\n%s\n%s\n", yaffs_fs_c_version,
- yaffs_guts_c_version);
- }
-
- /* hold lock_kernel while traversing yaffs_dev_list */
- lock_kernel();
-
- /* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_dev_list) {
- yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
- if (n < step) {
- n++;
- continue;
- }
- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
- buf = yaffs_dump_dev(buf, dev);
- break;
- }
- unlock_kernel();
-
- return buf - page < count ? buf - page : count;
-}
-
-/**
- * Set the verbosity of the warnings and error messages.
- *
- * Note that the names can only be a..z or _ with the current code.
- */
-
-static struct {
- char *mask_name;
- unsigned mask_bitfield;
-} mask_flags[] = {
- {"allocate", YAFFS_TRACE_ALLOCATE},
- {"always", YAFFS_TRACE_ALWAYS},
- {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
- {"buffers", YAFFS_TRACE_BUFFERS},
- {"bug", YAFFS_TRACE_BUG},
- {"checkpt", YAFFS_TRACE_CHECKPOINT},
- {"deletion", YAFFS_TRACE_DELETION},
- {"erase", YAFFS_TRACE_ERASE},
- {"error", YAFFS_TRACE_ERROR},
- {"gc_detail", YAFFS_TRACE_GC_DETAIL},
- {"gc", YAFFS_TRACE_GC},
- {"mtd", YAFFS_TRACE_MTD},
- {"nandaccess", YAFFS_TRACE_NANDACCESS},
- {"os", YAFFS_TRACE_OS},
- {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
- {"scan", YAFFS_TRACE_SCAN},
- {"tracing", YAFFS_TRACE_TRACING},
-
- {"verify", YAFFS_TRACE_VERIFY},
- {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
- {"verify_full", YAFFS_TRACE_VERIFY_FULL},
- {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-
- {"write", YAFFS_TRACE_WRITE},
- {"all", 0xffffffff},
- {"none", 0},
- {NULL, 0},
-};
-
-#define MAX_MASK_NAME_LENGTH 40
-static int yaffs_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
-{
- unsigned rg = 0, mask_bitfield;
- char *end;
- char *mask_name;
- const char *x;
- char substring[MAX_MASK_NAME_LENGTH + 1];
- int i;
- int done = 0;
- int add, len = 0;
- int pos = 0;
-
- rg = yaffs_traceMask;
-
- while (!done && (pos < count)) {
- done = 1;
- while ((pos < count) && isspace(buf[pos]))
- pos++;
-
- switch (buf[pos]) {
- case '+':
- case '-':
- case '=':
- add = buf[pos];
- pos++;
- break;
-
- default:
- add = ' ';
- break;
- }
- mask_name = NULL;
-
- mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-
- if (end > buf + pos) {
- mask_name = "numeral";
- len = end - (buf + pos);
- pos += len;
- done = 0;
- } else {
- for (x = buf + pos, i = 0;
- (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
- i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
- substring[i] = *x;
- substring[i] = '\0';
-
- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- if (strcmp(substring, mask_flags[i].mask_name) == 0) {
- mask_name = mask_flags[i].mask_name;
- mask_bitfield = mask_flags[i].mask_bitfield;
- done = 0;
- break;
- }
- }
- }
-
- if (mask_name != NULL) {
- done = 0;
- switch (add) {
- case '-':
- rg &= ~mask_bitfield;
- break;
- case '+':
- rg |= mask_bitfield;
- break;
- case '=':
- rg = mask_bitfield;
- break;
- default:
- rg |= mask_bitfield;
- break;
- }
- }
- }
-
- yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
-
- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
-
- if (rg & YAFFS_TRACE_ALWAYS) {
- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- char flag;
- flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
- }
- }
-
- return count;
-}
-
-/* Stuff to handle installation of file systems */
-struct file_system_to_install {
- struct file_system_type *fst;
- int installed;
-};
-
-static struct file_system_to_install fs_to_install[] = {
- {&yaffs_fs_type, 0},
- {&yaffs2_fs_type, 0},
- {NULL, 0}
-};
-
-static int __init init_yaffs_fs(void)
-{
- int error = 0;
- struct file_system_to_install *fsinst;
-
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
-
- /* Install the proc_fs entry */
- my_proc_entry = create_proc_entry("yaffs",
- S_IRUGO | S_IFREG,
- YPROC_ROOT);
-
- if (my_proc_entry) {
- my_proc_entry->write_proc = yaffs_proc_write;
- my_proc_entry->read_proc = yaffs_proc_read;
- my_proc_entry->data = NULL;
- } else
- return -ENOMEM;
-
- /* Now add the file system entries */
-
- fsinst = fs_to_install;
-
- while (fsinst->fst && !error) {
- error = register_filesystem(fsinst->fst);
- if (!error)
- fsinst->installed = 1;
- fsinst++;
- }
-
- /* Any errors? uninstall */
- if (error) {
- fsinst = fs_to_install;
-
- while (fsinst->fst) {
- if (fsinst->installed) {
- unregister_filesystem(fsinst->fst);
- fsinst->installed = 0;
- }
- fsinst++;
- }
- }
-
- return error;
-}
-
-static void __exit exit_yaffs_fs(void)
-{
-
- struct file_system_to_install *fsinst;
-
- T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
- " removing. \n"));
-
- remove_proc_entry("yaffs", YPROC_ROOT);
-
- fsinst = fs_to_install;
-
- while (fsinst->fst) {
- if (fsinst->installed) {
- unregister_filesystem(fsinst->fst);
- fsinst->installed = 0;
- }
- fsinst++;
- }
-}
-
-module_init(init_yaffs_fs)
-module_exit(exit_yaffs_fs)
-
-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * 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_GETBLOCKINFO_H__
-#define __YAFFS_GETBLOCKINFO_H__
-
-#include "yaffs_guts.h"
-
-/* 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];
-}
-
-#endif
+++ /dev/null
-/*
- * 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$";
-
-#include "yportenv.h"
-
-#include "yaffsinterface.h"
-#include "yaffs_guts.h"
-#include "yaffs_tagsvalidity.h"
-#include "yaffs_getblockinfo.h"
-
-#include "yaffs_tagscompat.h"
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
-#include "yaffs_qsort.h"
-#endif
-#include "yaffs_nand.h"
-
-#include "yaffs_checkptrw.h"
-
-#include "yaffs_nand.h"
-#include "yaffs_packedtags2.h"
-
-
-#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 int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
- int chunkInNAND);
-
-static int yaffs_UnlinkWorker(yaffs_Object *obj);
-
-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
- int chunkInObject);
-
-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
- yaffs_BlockInfo **blockUsedPtr);
-
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
-
-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
-
-static void yaffs_VerifyDirectory(yaffs_Object *directory);
-#ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object *in);
-#else
-#define yaffs_CheckFileSanity(in)
-#endif
-
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
-
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
-
-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags);
-
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
- unsigned pos);
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId);
-
-
-/* Function to calculate chunk and offset */
-
-static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
- __u32 *offsetOut)
-{
- int chunk;
- __u32 offset;
-
- chunk = (__u32)(addr >> dev->chunkShift);
-
- if (dev->chunkDiv == 1) {
- /* easy power of 2 case */
- offset = (__u32)(addr & dev->chunkMask);
- } else {
- /* Non power-of-2 case */
-
- loff_t chunkBase;
-
- chunk /= dev->chunkDiv;
-
- chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
- offset = (__u32)(addr - chunkBase);
- }
-
- *chunkOut = chunk;
- *offsetOut = offset;
-}
-
-/* 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 Shifts(__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->totalBytesPerChunk);
- }
-
- return buf ? YAFFS_OK : YAFFS_FAIL;
-}
-
-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
-{
- int i, j;
-
- dev->tempInUse++;
- if (dev->tempInUse > dev->maxTemp)
- dev->maxTemp = dev->tempInUse;
-
- 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);
-
-}
-
-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
- int lineNo)
-{
- int i;
-
- dev->tempInUse--;
-
- 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 >= 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 */
- /* This will need to change if we do partial gc */
-
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
- bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
- n, bi->blockState));
- }
-}
-
-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 < 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 (obj && 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;
-
- 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) {
- 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;
- yaffs_Device *dev;
- yaffs_ExtendedTags tags;
- yaffs_Tnode *tn;
- __u32 objectId;
-
- if (!obj)
- return;
-
- if (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_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 chunkInRange;
- __u32 chunkShouldNotBeDeleted;
- __u32 chunkValid;
-
- if (!obj)
- return;
-
- if (obj->beingCreated)
- 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;
-
- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
- chunkIdOk = chunkInRange || obj->hdrChunk == 0;
- chunkValid = chunkInRange &&
- yaffs_CheckChunkBit(dev,
- obj->hdrChunk / dev->nChunksPerBlock,
- obj->hdrChunk % dev->nChunksPerBlock);
- chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
-
- if (!obj->fake &&
- (!chunkIdOk || chunkShouldNotBeDeleted)) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
- obj->objectId, obj->hdrChunk,
- chunkIdOk ? "" : ",out of range",
- chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
- }
-
- if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
- yaffs_ExtendedTags tags;
- yaffs_ObjectHeader *oh;
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- oh = (yaffs_ObjectHeader *)buffer;
-
- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, 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 ylist_head *lh;
-
- if (yaffs_SkipVerification(dev))
- return;
-
- /* Iterate through the objects in each hash entry */
-
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- yaffs_VerifyObject(obj);
- }
- }
- }
-}
-
-
-/*
- * 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.
- * Note that root might have a presence in NAND if permissions are set.
- */
-
-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 &&
- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-
- if (!writeOk)
- chunk = -1;
-
- if (attempts > 1) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
-
- dev->nRetriedWrites += (attempts - 1);
- }
-
- return chunk;
-}
-
-/*
- * Block retiring for handling a broken block.
- */
-
-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_InvalidateCheckpoint(dev);
-
- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
- T(YAFFS_TRACE_ALWAYS, (TSTR(
- "yaffs: Failed to mark bad and erase block %d"
- TENDSTR), blockInNAND));
- } else {
- yaffs_ExtendedTags tags;
- int chunkId = blockInNAND * dev->nChunksPerBlock;
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- memset(buffer, 0xff, dev->nDataBytesPerChunk);
- yaffs_InitialiseTags(&tags);
- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
- dev->chunkOffset, buffer, &tags) != YAFFS_OK)
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
- TCONT("write bad block marker to block %d")
- TENDSTR), blockInNAND));
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- }
- }
-
- bi->blockState = YAFFS_BLOCK_STATE_DEAD;
- bi->gcPrioritise = 0;
- bi->needsRetiring = 0;
-
- dev->nRetiredBlocks++;
-}
-
-/*
- * Functions for robustisizing TODO
- *
- */
-
-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
- const __u8 *data,
- const yaffs_ExtendedTags *tags)
-{
-}
-
-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
- const yaffs_ExtendedTags *tags)
-{
-}
-
-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
-{
- if (!bi->gcPrioritise) {
- bi->gcPrioritise = 1;
- dev->hasPendingPrioritisedGCs = 1;
- bi->chunkErrorStrikes++;
-
- if (bi->chunkErrorStrikes > 3) {
- bi->needsRetiring = 1; /* Too many stikes, so retire this */
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
-
- }
- }
-}
-
-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
- int erasedOk)
-{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_HandleChunkError(dev, bi);
-
- if (erasedOk) {
- /* Was an actual write failure, so mark the block for retirement */
- bi->needsRetiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
- }
-
- /* Delete the chunk */
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
-}
-
-
-/*---------------- Name handling functions ------------*/
-
-static __u16 yaffs_CalcNameSum(const YCHAR *name)
-{
- __u16 sum = 0;
- __u16 i = 1;
-
- const YUCHAR *bname = (const YUCHAR *) name;
- if (bname) {
- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
-
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- sum += yaffs_toupper(*bname) * i;
-#else
- sum += (*bname) * i;
-#endif
- i++;
- bname++;
- }
- }
- return sum;
-}
-
-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
-{
-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
- yaffs_strcpy(obj->shortName, name);
- else
- obj->shortName[0] = _Y('\0');
-#endif
- obj->sum = yaffs_CalcNameSum(name);
-}
-
-/*-------------------- TNODES -------------------
-
- * List of spare tnodes
- * The list is hooked together using the first pointer
- * in the tnode.
- */
-
-/* yaffs_CreateTnodes creates a bunch more tnodes and
- * adds them to the tnode free list.
- * Don't use this function directly
- */
-
-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
-{
- int i;
- int tnodeSize;
- yaffs_Tnode *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if (nTnodes < 1)
- return YAFFS_OK;
-
- /* Calculate the tnode size in bytes for variable width tnode support.
- * Must be a multiple of 32-bits */
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- /* make these things */
-
- newTnodes = YMALLOC(nTnodes * tnodeSize);
- mem = (__u8 *)newTnodes;
-
- if (!newTnodes) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
-#if 0
- for (i = 0; i < nTnodes - 1; i++) {
- newTnodes[i].internal[0] = &newTnodes[i + 1];
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- }
-
- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- dev->freeTnodes = newTnodes;
-#else
- /* New hookup for wide tnodes */
- for (i = 0; i < nTnodes - 1; i++) {
- curr = (yaffs_Tnode *) &mem[i * tnodeSize];
- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
- curr->internal[0] = next;
- }
-
- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
- curr->internal[0] = dev->freeTnodes;
- dev->freeTnodes = (yaffs_Tnode *)mem;
-
-#endif
-
-
- dev->nFreeTnodes += nTnodes;
- dev->nTnodesCreated += nTnodes;
-
- /* Now add this bunch of tnodes to a list for freeing up.
- * NB If we can't add this to the management list it isn't fatal
- * but it just means we can't free this bunch of tnodes later.
- */
-
- tnl = YMALLOC(sizeof(yaffs_TnodeList));
- if (!tnl) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs: Could not add tnodes to management list" TENDSTR)));
- return YAFFS_FAIL;
- } else {
- tnl->tnodes = newTnodes;
- tnl->next = dev->allocatedTnodeList;
- dev->allocatedTnodeList = tnl;
- }
-
- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
-
- return YAFFS_OK;
-}
-
-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
-
-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = NULL;
-
- /* If there are none left make more */
- if (!dev->freeTnodes)
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-
- if (dev->freeTnodes) {
- tn = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- dev->freeTnodes = dev->freeTnodes->internal[0];
- dev->nFreeTnodes--;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- if (tn)
- memset(tn, 0, tnodeSize);
-
- return tn;
-}
-
-/* FreeTnode frees up a tnode and puts it back on the free list */
-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
-{
- if (tn) {
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
- /* Hoosterman, this thing looks like it is already in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
- }
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- tn->internal[0] = dev->freeTnodes;
- dev->freeTnodes = tn;
- dev->nFreeTnodes++;
- }
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
-{
- /* Free the list of allocated tnodes */
- yaffs_TnodeList *tmp;
-
- while (dev->allocatedTnodeList) {
- tmp = dev->allocatedTnodeList->next;
-
- YFREE(dev->allocatedTnodeList->tnodes);
- YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
-
- }
-
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
-}
-
-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
-{
- dev->allocatedTnodeList = NULL;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
- dev->nTnodesCreated = 0;
-}
-
-
-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
- unsigned val)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 mask;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
- val >>= dev->chunkGroupBits;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- mask = dev->tnodeMask << bitInWord;
-
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val << bitInWord));
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val >> bitInWord));
- }
-}
-
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
- unsigned pos)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 val;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- val = map[wordInMap] >> bitInWord;
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- val |= (map[wordInMap] << bitInWord);
- }
-
- val &= dev->tnodeMask;
- val <<= dev->chunkGroupBits;
-
- return val;
-}
-
-/* ------------------- End of individual tnode manipulation -----------------*/
-
-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
- * The look up tree is represented by the top tnode and the number of topLevel
- * in the tree. 0 means only the level 0 tnode is in the tree.
- */
-
-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId)
-{
- yaffs_Tnode *tn = fStruct->top;
- __u32 i;
- int requiredTallness;
- int level = fStruct->topLevel;
-
- /* Check sane level and chunk Id */
- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (i) {
- i >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
- if (requiredTallness > fStruct->topLevel)
- return NULL; /* Not tall enough, so we can't find it */
-
- /* Traverse down to level 0 */
- while (level > 0 && tn) {
- tn = tn->internal[(chunkId >>
- (YAFFS_TNODES_LEVEL0_BITS +
- (level - 1) *
- YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK];
- level--;
- }
-
- return tn;
-}
-
-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
- * This happens in two steps:
- * 1. If the tree isn't tall enough, then make it taller.
- * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
- *
- * Used when modifying the tree.
- *
- * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
- * be plugged into the ttree.
- */
-
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId,
- yaffs_Tnode *passedTn)
-{
- int requiredTallness;
- int i;
- int l;
- yaffs_Tnode *tn;
-
- __u32 x;
-
-
- /* Check sane level and page Id */
- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (x) {
- x >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
-
- if (requiredTallness > fStruct->topLevel) {
- /* Not tall enough, gotta make the tree taller */
- for (i = fStruct->topLevel; i < requiredTallness; i++) {
-
- tn = yaffs_GetTnode(dev);
-
- if (tn) {
- tn->internal[0] = fStruct->top;
- fStruct->top = tn;
- } else {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: no more tnodes" TENDSTR)));
- }
- }
-
- fStruct->topLevel = requiredTallness;
- }
-
- /* Traverse down to level 0, adding anything we need */
-
- l = fStruct->topLevel;
- tn = fStruct->top;
-
- if (l > 0) {
- while (l > 0 && tn) {
- x = (chunkId >>
- (YAFFS_TNODES_LEVEL0_BITS +
- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
-
-
- if ((l > 1) && !tn->internal[x]) {
- /* Add missing non-level-zero tnode */
- tn->internal[x] = yaffs_GetTnode(dev);
-
- } else if (l == 1) {
- /* Looking from level 1 at level 0 */
- if (passedTn) {
- /* If we already have one, then release it.*/
- if (tn->internal[x])
- yaffs_FreeTnode(dev, tn->internal[x]);
- tn->internal[x] = passedTn;
-
- } else if (!tn->internal[x]) {
- /* Don't have one, none passed in */
- tn->internal[x] = yaffs_GetTnode(dev);
- }
- }
-
- tn = tn->internal[x];
- l--;
- }
- } else {
- /* top is level 0 */
- if (passedTn) {
- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
- yaffs_FreeTnode(dev, passedTn);
- }
- }
-
- return tn;
-}
-
-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
- yaffs_ExtendedTags *tags, int objectId,
- int chunkInInode)
-{
- int j;
-
- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
- tags);
- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
- /* found it; */
- return theChunk;
- }
- }
- theChunk++;
- }
- return -1;
-}
-
-
-/* DeleteWorker scans backwards through the tnode tree and deletes all the
- * chunks and tnodes in the file
- * Returns 1 if the tree was deleted.
- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
- */
-
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit)
-{
- int i;
- int chunkInInode;
- int theChunk;
- yaffs_ExtendedTags tags;
- int foundChunk;
- yaffs_Device *dev = in->myDev;
-
- int allDone = 1;
-
- if (tn) {
- if (level > 0) {
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- if (limit && (*limit) < 0) {
- allDone = 0;
- } else {
- allDone =
- yaffs_DeleteWorker(in,
- tn->
- internal
- [i],
- level -
- 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i,
- limit);
- }
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
- int hitLimit = 0;
-
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
- i--) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk) {
-
- chunkInInode = (chunkOffset <<
- YAFFS_TNODES_LEVEL0_BITS) + i;
-
- foundChunk =
- yaffs_FindChunkInGroup(dev,
- theChunk,
- &tags,
- in->objectId,
- chunkInInode);
-
- if (foundChunk > 0) {
- yaffs_DeleteChunk(dev,
- foundChunk, 1,
- __LINE__);
- in->nDataChunks--;
- if (limit) {
- *limit = *limit - 1;
- if (*limit <= 0)
- hitLimit = 1;
- }
-
- }
-
- yaffs_PutLevel0Tnode(dev, tn, i, 0);
- }
-
- }
- return (i < 0) ? 1 : 0;
-
- }
-
- }
-
- return 1;
-
-}
-
-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
-{
- yaffs_BlockInfo *theBlock;
-
- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
-
- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
- if (theBlock) {
- theBlock->softDeletions++;
- dev->nFreeChunks++;
- }
-}
-
-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
- * All soft deleting does is increment the block's softdelete count and pulls the chunk out
- * of the tnode.
- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
- */
-
-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- int theChunk;
- int allDone = 1;
- yaffs_Device *dev = in->myDev;
-
- if (tn) {
- if (level > 0) {
-
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- allDone =
- yaffs_SoftDeleteWorker(in,
- tn->
- internal[i],
- level - 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i);
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- } else {
- /* Hoosterman... how could this happen? */
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
-
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk) {
- /* Note this does not find the real chunk, only the chunk group.
- * We make an assumption that a chunk group is not larger than
- * a block.
- */
- yaffs_SoftDeleteChunk(dev, theChunk);
- yaffs_PutLevel0Tnode(dev, tn, i, 0);
- }
-
- }
- return 1;
-
- }
-
- }
-
- return 1;
-
-}
-
-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
-{
- if (obj->deleted &&
- obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
- if (obj->nDataChunks <= 0) {
- /* Empty file with no duplicate object headers, just delete it immediately */
- yaffs_FreeTnode(obj->myDev,
- obj->variant.fileVariant.top);
- obj->variant.fileVariant.top = NULL;
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: Deleting empty file %d" TENDSTR),
- obj->objectId));
- yaffs_DoGenericObjectDeletion(obj);
- } else {
- yaffs_SoftDeleteWorker(obj,
- obj->variant.fileVariant.top,
- obj->variant.fileVariant.
- topLevel, 0);
- obj->softDeleted = 1;
- }
- }
-}
-
-/* Pruning removes any part of the file structure tree that is beyond the
- * bounds of the file (ie that does not point to chunks).
- *
- * A file should only get pruned when its size is reduced.
- *
- * Before pruning, the chunks must be pulled from the tree and the
- * level 0 tnode entries must be zeroed out.
- * Could also use this for file deletion, but that's probably better handled
- * by a special case.
- */
-
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
- __u32 level, int del0)
-{
- int i;
- int hasData;
-
- if (tn) {
- hasData = 0;
-
- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i] && level > 0) {
- tn->internal[i] =
- yaffs_PruneWorker(dev, tn->internal[i],
- level - 1,
- (i == 0) ? del0 : 1);
- }
-
- if (tn->internal[i])
- hasData++;
- }
-
- if (hasData == 0 && del0) {
- /* Free and return NULL */
-
- yaffs_FreeTnode(dev, tn);
- tn = NULL;
- }
-
- }
-
- return tn;
-
-}
-
-static int yaffs_PruneFileStructure(yaffs_Device *dev,
- yaffs_FileStructure *fStruct)
-{
- int i;
- int hasData;
- int done = 0;
- yaffs_Tnode *tn;
-
- if (fStruct->topLevel > 0) {
- fStruct->top =
- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
-
- /* Now we have a tree with all the non-zero branches NULL but the height
- * is the same as it was.
- * Let's see if we can trim internal tnodes to shorten the tree.
- * We can do this if only the 0th element in the tnode is in use
- * (ie all the non-zero are NULL)
- */
-
- while (fStruct->topLevel && !done) {
- tn = fStruct->top;
-
- hasData = 0;
- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i])
- hasData++;
- }
-
- if (!hasData) {
- fStruct->top = tn->internal[0];
- fStruct->topLevel--;
- yaffs_FreeTnode(dev, tn);
- } else {
- done = 1;
- }
- }
- }
-
- return YAFFS_OK;
-}
-
-/*-------------------- End of File Structure functions.-------------------*/
-
-/* yaffs_CreateFreeObjects creates a bunch more objects and
- * adds them to the object free list.
- */
-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
-{
- int i;
- yaffs_Object *newObjects;
- yaffs_ObjectList *list;
-
- if (nObjects < 1)
- return YAFFS_OK;
-
- /* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
- list = YMALLOC(sizeof(yaffs_ObjectList));
-
- if (!newObjects || !list) {
- if (newObjects)
- YFREE(newObjects);
- if (list)
- YFREE(list);
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
- for (i = 0; i < nObjects - 1; i++) {
- newObjects[i].siblings.next =
- (struct ylist_head *)(&newObjects[i + 1]);
- }
-
- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
- dev->freeObjects = newObjects;
- dev->nFreeObjects += nObjects;
- dev->nObjectsCreated += nObjects;
-
- /* Now add this bunch of Objects to a list for freeing up. */
-
- list->objects = newObjects;
- list->next = dev->allocatedObjectList;
- dev->allocatedObjectList = list;
-
- return YAFFS_OK;
-}
-
-
-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
-{
- yaffs_Object *tn = NULL;
-
-#ifdef VALGRIND_TEST
- tn = YMALLOC(sizeof(yaffs_Object));
-#else
- /* If there are none left make more */
- if (!dev->freeObjects)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
-
- if (dev->freeObjects) {
- tn = dev->freeObjects;
- dev->freeObjects =
- (yaffs_Object *) (dev->freeObjects->siblings.next);
- dev->nFreeObjects--;
- }
-#endif
- if (tn) {
- /* Now sweeten it up... */
-
- memset(tn, 0, sizeof(yaffs_Object));
- tn->beingCreated = 1;
-
- tn->myDev = dev;
- tn->hdrChunk = 0;
- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- YINIT_LIST_HEAD(&(tn->hardLinks));
- YINIT_LIST_HEAD(&(tn->hashLink));
- YINIT_LIST_HEAD(&tn->siblings);
-
-
- /* Now make the directory sane */
- if (dev->rootDir) {
- tn->parent = dev->rootDir;
- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
- }
-
- /* Add it to the lost and found directory.
- * NB Can't put root or lostNFound in lostNFound so
- * check if lostNFound exists first
- */
- if (dev->lostNFoundDir)
- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
-
- tn->beingCreated = 0;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
- __u32 mode)
-{
-
- yaffs_Object *obj =
- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
- if (obj) {
- obj->fake = 1; /* it is fake so it might have no NAND presence... */
- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
- obj->unlinkAllowed = 0; /* ... or unlink it */
- obj->deleted = 0;
- obj->unlinked = 0;
- obj->yst_mode = mode;
- obj->myDev = dev;
- obj->hdrChunk = 0; /* Not a valid chunk. */
- }
-
- return obj;
-
-}
-
-static void yaffs_UnhashObject(yaffs_Object *tn)
-{
- int bucket;
- yaffs_Device *dev = tn->myDev;
-
- /* If it is still linked into the bucket list, free from the list */
- if (!ylist_empty(&tn->hashLink)) {
- ylist_del_init(&tn->hashLink);
- bucket = yaffs_HashFunction(tn->objectId);
- dev->objectBucket[bucket].count--;
- }
-}
-
-/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object *tn)
-{
- yaffs_Device *dev = tn->myDev;
-
-#ifdef __KERNEL__
- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
-#endif
-
- if (tn->parent)
- YBUG();
- if (!ylist_empty(&tn->siblings))
- YBUG();
-
-
-#ifdef __KERNEL__
- if (tn->myInode) {
- /* We're still hooked up to a cached inode.
- * Don't delete now, but mark for later deletion
- */
- tn->deferedFree = 1;
- return;
- }
-#endif
-
- yaffs_UnhashObject(tn);
-
-#ifdef VALGRIND_TEST
- YFREE(tn);
-#else
- /* Link into the free list. */
- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-#endif
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-#ifdef __KERNEL__
-
-void yaffs_HandleDeferedFree(yaffs_Object *obj)
-{
- if (obj->deferedFree)
- yaffs_FreeObject(obj);
-}
-
-#endif
-
-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
-{
- /* Free the list of allocated Objects */
-
- yaffs_ObjectList *tmp;
-
- while (dev->allocatedObjectList) {
- tmp = dev->allocatedObjectList->next;
- YFREE(dev->allocatedObjectList->objects);
- YFREE(dev->allocatedObjectList);
-
- dev->allocatedObjectList = tmp;
- }
-
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-}
-
-static void yaffs_InitialiseObjects(yaffs_Device *dev)
-{
- int i;
-
- dev->allocatedObjectList = NULL;
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- YINIT_LIST_HEAD(&dev->objectBucket[i].list);
- dev->objectBucket[i].count = 0;
- }
-}
-
-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
-{
- static int x;
- int i;
- int l = 999;
- int lowest = 999999;
-
- /* First let's see if we can find one that's empty. */
-
- for (i = 0; i < 10 && lowest > 0; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
-
- }
-
- /* If we didn't find an empty list, then try
- * looking a bit further for a short one
- */
-
- for (i = 0; i < 10 && lowest > 3; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
-
- }
-
- return l;
-}
-
-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
-{
- int bucket = yaffs_FindNiceObjectBucket(dev);
-
- /* Now find an object value that has not already been taken
- * by scanning the list.
- */
-
- int found = 0;
- struct ylist_head *i;
-
- __u32 n = (__u32) bucket;
-
- /* yaffs_CheckObjectHashSanity(); */
-
- while (!found) {
- found = 1;
- n += YAFFS_NOBJECT_BUCKETS;
- if (1 || dev->objectBucket[bucket].count > 0) {
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* If there is already one in the list */
- if (i && ylist_entry(i, yaffs_Object,
- hashLink)->objectId == n) {
- found = 0;
- }
- }
- }
- }
-
- return n;
-}
-
-static void yaffs_HashObject(yaffs_Object *in)
-{
- int bucket = yaffs_HashFunction(in->objectId);
- yaffs_Device *dev = in->myDev;
-
- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
- dev->objectBucket[bucket].count++;
-}
-
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
-{
- int bucket = yaffs_HashFunction(number);
- struct ylist_head *i;
- yaffs_Object *in;
-
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* Look if it is in the list */
- if (i) {
- in = ylist_entry(i, yaffs_Object, hashLink);
- if (in->objectId == number) {
-#ifdef __KERNEL__
- /* Don't tell the VFS about this one if it is defered free */
- if (in->deferedFree)
- return NULL;
-#endif
-
- return in;
- }
- }
- }
-
- return NULL;
-}
-
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject;
- yaffs_Tnode *tn = NULL;
-
- if (number < 0)
- number = yaffs_CreateNewObjectNumber(dev);
-
- theObject = yaffs_AllocateEmptyObject(dev);
- if (!theObject)
- return NULL;
-
- if (type == YAFFS_OBJECT_TYPE_FILE) {
- tn = yaffs_GetTnode(dev);
- if (!tn) {
- yaffs_FreeObject(theObject);
- return NULL;
- }
- }
-
- if (theObject) {
- theObject->fake = 0;
- theObject->renameAllowed = 1;
- theObject->unlinkAllowed = 1;
- theObject->objectId = number;
- yaffs_HashObject(theObject);
- theObject->variantType = type;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(theObject->win_atime);
- theObject->win_ctime[0] = theObject->win_mtime[0] =
- theObject->win_atime[0];
- theObject->win_ctime[1] = theObject->win_mtime[1] =
- theObject->win_atime[1];
-
-#else
-
- theObject->yst_atime = theObject->yst_mtime =
- theObject->yst_ctime = Y_CURRENT_TIME;
-#endif
- switch (type) {
- case YAFFS_OBJECT_TYPE_FILE:
- theObject->variant.fileVariant.fileSize = 0;
- theObject->variant.fileVariant.scannedFileSize = 0;
- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
- theObject->variant.fileVariant.topLevel = 0;
- theObject->variant.fileVariant.top = tn;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
- children);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* No action required */
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* todo this should not happen */
- break;
- }
- }
-
- return theObject;
-}
-
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
- int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject = NULL;
-
- if (number > 0)
- theObject = yaffs_FindObjectByNumber(dev, number);
-
- if (!theObject)
- theObject = yaffs_CreateNewObject(dev, number, type);
-
- return theObject;
-
-}
-
-
-static YCHAR *yaffs_CloneString(const YCHAR *str)
-{
- YCHAR *newStr = NULL;
-
- if (str && *str) {
- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- if (newStr)
- yaffs_strcpy(newStr, str);
- }
-
- return newStr;
-
-}
-
-/*
- * Mknod (create) a new object.
- * equivalentObject only has meaning for a hard link;
- * aliasString only has meaning for a sumlink.
- * rdev only has meaning for devices (a subset of special objects)
- */
-
-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
- yaffs_Object *parent,
- const YCHAR *name,
- __u32 mode,
- __u32 uid,
- __u32 gid,
- yaffs_Object *equivalentObject,
- const YCHAR *aliasString, __u32 rdev)
-{
- yaffs_Object *in;
- YCHAR *str = NULL;
-
- yaffs_Device *dev = parent->myDev;
-
- /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
- if (yaffs_FindObjectByName(parent, name))
- return NULL;
-
- in = yaffs_CreateNewObject(dev, -1, type);
-
- if (!in)
- return YAFFS_FAIL;
-
- if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
- str = yaffs_CloneString(aliasString);
- if (!str) {
- yaffs_FreeObject(in);
- return NULL;
- }
- }
-
-
-
- if (in) {
- in->hdrChunk = 0;
- in->valid = 1;
- in->variantType = type;
-
- in->yst_mode = mode;
-
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_atime);
- in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
- in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
-
-#else
- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
-
- in->yst_rdev = rdev;
- in->yst_uid = uid;
- in->yst_gid = gid;
-#endif
- in->nDataChunks = 0;
-
- yaffs_SetObjectName(in, name);
- in->dirty = 1;
-
- yaffs_AddObjectToDirectory(parent, in);
-
- in->myDev = parent->myDev;
-
- switch (type) {
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias = str;
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.equivalentObject =
- equivalentObject;
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObject->objectId;
- ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
- break;
- case YAFFS_OBJECT_TYPE_FILE:
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* do nothing */
- break;
- }
-
- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
- /* Could not create the object header, fail the creation */
- yaffs_DeleteObject(in);
- in = NULL;
- }
-
- }
-
- return in;
-}
-
-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
- uid, gid, NULL, NULL, 0);
-}
-
-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
- mode, uid, gid, NULL, NULL, 0);
-}
-
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
- uid, gid, NULL, NULL, rdev);
-}
-
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid,
- const YCHAR *alias)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
- uid, gid, NULL, alias, 0);
-}
-
-/* yaffs_Link returns the object id of the equivalent object.*/
-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
- yaffs_Object *equivalentObject)
-{
- /* Get the real object in case we were fed a hard link as an equivalent object */
- equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
-
- if (yaffs_MknodObject
- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
- equivalentObject, NULL, 0)) {
- return equivalentObject;
- } else {
- return NULL;
- }
-
-}
-
-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
- const YCHAR *newName, int force, int shadows)
-{
- int unlinkOp;
- int deleteOp;
-
- yaffs_Object *existingTarget;
-
- if (newDir == NULL)
- newDir = obj->parent; /* use the old directory */
-
- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
- TENDSTR)));
- YBUG();
- }
-
- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->myDev->isYaffs2)
- unlinkOp = (newDir == obj->myDev->unlinkedDir);
- else
- unlinkOp = (newDir == obj->myDev->unlinkedDir
- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
-
- deleteOp = (newDir == obj->myDev->deletedDir);
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
-
- /* If the object is a file going into the unlinked directory,
- * then it is OK to just stuff it in since duplicate names are allowed.
- * else only proceed if the new name does not exist and if we're putting
- * it into a directory.
- */
- if ((unlinkOp ||
- deleteOp ||
- force ||
- (shadows > 0) ||
- !existingTarget) &&
- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
- yaffs_SetObjectName(obj, newName);
- obj->dirty = 1;
-
- yaffs_AddObjectToDirectory(newDir, obj);
-
- if (unlinkOp)
- obj->unlinked = 1;
-
- /* If it is a deletion then we mark it as a shrink for gc purposes. */
- if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
- return YAFFS_OK;
- }
-
- return YAFFS_FAIL;
-}
-
-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
- yaffs_Object *newDir, const YCHAR *newName)
-{
- yaffs_Object *obj = NULL;
- yaffs_Object *existingTarget = NULL;
- int force = 0;
-
-
- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
-
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- /* Special case for case insemsitive systems (eg. WinCE).
- * While look-up is case insensitive, the name isn't.
- * Therefore we might want to change x.txt to X.txt
- */
- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
- force = 1;
-#endif
-
- else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
- /* ENAMETOOLONG */
- return YAFFS_FAIL;
-
- obj = yaffs_FindObjectByName(oldDir, oldName);
-
- if (obj && obj->renameAllowed) {
-
- /* Now do the handling for an existing target, if there is one */
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
- if (existingTarget &&
- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
- /* There is a target that is a non-empty directory, so we fail */
- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
- } else if (existingTarget && existingTarget != obj) {
- /* Nuke the target first, using shadowing,
- * but only if it isn't the same object
- */
- yaffs_ChangeObjectName(obj, newDir, newName, force,
- existingTarget->objectId);
- yaffs_UnlinkObject(existingTarget);
- }
-
- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
- }
- return YAFFS_FAIL;
-}
-
-/*------------------------- Block Management and Page Allocation ----------------*/
-
-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
-{
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
-
- dev->blockInfo = NULL;
- dev->chunkBits = NULL;
-
- dev->allocationBlock = -1; /* force it to get a new one */
-
- /* If the first allocation strategy fails, thry the alternate one */
- dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
- if (!dev->blockInfo) {
- dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
- dev->blockInfoAlt = 1;
- } else
- dev->blockInfoAlt = 0;
-
- if (dev->blockInfo) {
- /* Set up dynamic blockinfo stuff. */
- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
- dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
- if (!dev->chunkBits) {
- dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
- dev->chunkBitsAlt = 1;
- } else
- dev->chunkBitsAlt = 0;
- }
-
- if (dev->blockInfo && dev->chunkBits) {
- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
- return YAFFS_OK;
- }
-
- return YAFFS_FAIL;
-}
-
-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
-{
- if (dev->blockInfoAlt && dev->blockInfo)
- YFREE_ALT(dev->blockInfo);
- else if (dev->blockInfo)
- YFREE(dev->blockInfo);
-
- dev->blockInfoAlt = 0;
-
- dev->blockInfo = NULL;
-
- if (dev->chunkBitsAlt && dev->chunkBits)
- YFREE_ALT(dev->chunkBits);
- else if (dev->chunkBits)
- YFREE(dev->chunkBits);
- dev->chunkBitsAlt = 0;
- dev->chunkBits = NULL;
-}
-
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
- yaffs_BlockInfo *bi)
-{
- int i;
- __u32 seq;
- yaffs_BlockInfo *b;
-
- if (!dev->isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
-
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
-
- /* Find the oldest dirty sequence number if we don't know it and save it
- * so we don't have to keep recomputing it.
- */
- if (!dev->oldestDirtySequence) {
- seq = dev->sequenceNumber;
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
- i++) {
- b = yaffs_GetBlockInfo(dev, i);
- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
- (b->pagesInUse - b->softDeletions) <
- dev->nChunksPerBlock && b->sequenceNumber < seq) {
- seq = b->sequenceNumber;
- }
- }
- dev->oldestDirtySequence = seq;
- }
-
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
- */
- return (bi->sequenceNumber <= dev->oldestDirtySequence);
-}
-
-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
- * for garbage collection.
- */
-
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
- int aggressive)
-{
- int b = dev->currentDirtyChecker;
-
- int i;
- int iterations;
- int dirtiest = -1;
- int pagesInUse = 0;
- int prioritised = 0;
- yaffs_BlockInfo *bi;
- int pendingPrioritisedExist = 0;
-
- /* First let's see if we need to grab a prioritised block */
- if (dev->hasPendingPrioritisedGCs) {
- for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
-
- bi = yaffs_GetBlockInfo(dev, i);
- /* yaffs_VerifyBlock(dev,bi,i); */
-
- if (bi->gcPrioritise) {
- pendingPrioritisedExist = 1;
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- dirtiest = i;
- prioritised = 1;
- aggressive = 1; /* Fool the non-aggressive skip logiv below */
- }
- }
- }
-
- if (!pendingPrioritisedExist) /* None found, so we can clear this */
- dev->hasPendingPrioritisedGCs = 0;
- }
-
- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
- * search harder.
- * else (we're doing a leasurely gc), then we only bother to do this if the
- * block has only a few pages in use.
- */
-
- dev->nonAggressiveSkip--;
-
- if (!aggressive && (dev->nonAggressiveSkip > 0))
- return -1;
-
- if (!prioritised)
- pagesInUse =
- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
-
- if (aggressive)
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- else {
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- iterations = iterations / 16;
- if (iterations > 200)
- iterations = 200;
- }
-
- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
- b++;
- if (b < dev->internalStartBlock || b > dev->internalEndBlock)
- b = dev->internalStartBlock;
-
- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> Block %d is not valid" TENDSTR), b));
- YBUG();
- }
-
- bi = yaffs_GetBlockInfo(dev, b);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- dirtiest = b;
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- }
- }
-
- dev->currentDirtyChecker = b;
-
- if (dirtiest > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
- dev->nChunksPerBlock - pagesInUse, prioritised));
- }
-
- dev->oldestDirtySequence = 0;
-
- if (dirtiest > 0)
- dev->nonAggressiveSkip = 4;
-
- return dirtiest;
-}
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
-
- int erasedOk = 0;
-
- /* If the block is still healthy erase it and mark as clean.
- * If the block has had a data failure, then retire it.
- */
-
- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
-
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
-
- if (!bi->needsRetiring) {
- yaffs_InvalidateCheckpoint(dev);
- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
- if (!erasedOk) {
- dev->nErasureFailures++;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
- }
- }
-
- if (erasedOk &&
- ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
- int i;
- for (i = 0; i < dev->nChunksPerBlock; i++) {
- if (!yaffs_CheckChunkErased
- (dev, blockNo * dev->nChunksPerBlock + i)) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- (">>Block %d erasure supposedly OK, but chunk %d not erased"
- TENDSTR), blockNo, i));
- }
- }
- }
-
- if (erasedOk) {
- /* Clean it up... */
- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
- bi->hasShrinkHeader = 0;
- bi->skipErasedCheck = 1; /* This is clean, so no need to check */
- bi->gcPrioritise = 0;
- yaffs_ClearChunkBits(dev, blockNo);
-
- T(YAFFS_TRACE_ERASE,
- (TSTR("Erased block %d" TENDSTR), blockNo));
- } else {
- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
-
- yaffs_RetireBlock(dev, blockNo);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
- }
-}
-
-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
-{
- int i;
-
- yaffs_BlockInfo *bi;
-
- if (dev->nErasedBlocks < 1) {
- /* Hoosterman we've got a problem.
- * Can't get space to gc
- */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
-
- return -1;
- }
-
- /* Find an empty block. */
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- dev->allocationBlockFinder++;
- if (dev->allocationBlockFinder < dev->internalStartBlock
- || dev->allocationBlockFinder > dev->internalEndBlock) {
- dev->allocationBlockFinder = dev->internalStartBlock;
- }
-
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->sequenceNumber++;
- bi->sequenceNumber = dev->sequenceNumber;
- dev->nErasedBlocks--;
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
- dev->allocationBlockFinder, dev->sequenceNumber,
- dev->nErasedBlocks));
- return dev->allocationBlockFinder;
- }
- }
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs tragedy: no more erased blocks, but there should have been %d"
- TENDSTR), dev->nErasedBlocks));
-
- return -1;
-}
-
-
-
-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- if (!dev->nCheckpointBlocksRequired &&
- dev->isYaffs2) {
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->endBlock - dev->startBlock + 1);
- int tnodeSize;
-
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(__u32); /* checksum*/
-
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
-
- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
-
- dev->nCheckpointBlocksRequired = nBlocks;
- }
-
- return dev->nCheckpointBlocksRequired;
-}
-
-/*
- * Check if there's space to allocate...
- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
- */
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
-{
- int reservedChunks;
- int reservedBlocks = dev->nReservedBlocks;
- int checkpointBlocks;
-
- if (dev->isYaffs2) {
- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
- dev->blocksInCheckpoint;
- if (checkpointBlocks < 0)
- checkpointBlocks = 0;
- } else {
- checkpointBlocks = 0;
- }
-
- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
-
- return (dev->nFreeChunks > reservedChunks);
-}
-
-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
- yaffs_BlockInfo **blockUsedPtr)
-{
- int retVal;
- yaffs_BlockInfo *bi;
-
- if (dev->allocationBlock < 0) {
- /* Get next block to allocate off */
- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
- dev->allocationPage = 0;
- }
-
- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
- /* Not enough space to allocate unless we're allowed to use the reserve. */
- return -1;
- }
-
- if (dev->nErasedBlocks < dev->nReservedBlocks
- && dev->allocationPage == 0) {
- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
- }
-
- /* Next page please.... */
- if (dev->allocationBlock >= 0) {
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
-
- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
- dev->allocationPage;
- bi->pagesInUse++;
- yaffs_SetChunkBit(dev, dev->allocationBlock,
- dev->allocationPage);
-
- dev->allocationPage++;
-
- dev->nFreeChunks--;
-
- /* If the block is full set the state to full */
- if (dev->allocationPage >= dev->nChunksPerBlock) {
- bi->blockState = YAFFS_BLOCK_STATE_FULL;
- dev->allocationBlock = -1;
- }
-
- if (blockUsedPtr)
- *blockUsedPtr = bi;
-
- return retVal;
- }
-
- T(YAFFS_TRACE_ERROR,
- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
-
- return -1;
-}
-
-static int yaffs_GetErasedChunks(yaffs_Device *dev)
-{
- int n;
-
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
-
- if (dev->allocationBlock > 0)
- n += (dev->nChunksPerBlock - dev->allocationPage);
-
- return n;
-
-}
-
-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
- int wholeBlock)
-{
- int oldChunk;
- int newChunk;
- int markNAND;
- int retVal = YAFFS_OK;
- int cleanups = 0;
- int i;
- int isCheckpointBlock;
- int matchingChunk;
- int maxCopies;
-
- int chunksBefore = yaffs_GetErasedChunks(dev);
- int chunksAfter;
-
- yaffs_ExtendedTags tags;
-
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
-
- yaffs_Object *object;
-
- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
-
- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
-
- T(YAFFS_TRACE_TRACING,
- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
- block,
- bi->pagesInUse,
- bi->hasShrinkHeader,
- wholeBlock));
-
- /*yaffs_VerifyFreeChunks(dev); */
-
- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
-
- /* Take off the number of soft deleted entries because
- * they're going to get really deleted during GC.
- */
- dev->nFreeChunks -= bi->softDeletions;
-
- dev->isDoingGC = 1;
-
- if (isCheckpointBlock ||
- !yaffs_StillSomeChunkBits(dev, block)) {
- T(YAFFS_TRACE_TRACING,
- (TSTR
- ("Collecting block %d that has no chunks in use" TENDSTR),
- block));
- yaffs_BlockBecameDirty(dev, block);
- } else {
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- yaffs_VerifyBlock(dev, bi, block);
-
- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
-
- for (/* init already done */;
- retVal == YAFFS_OK &&
- dev->gcChunk < dev->nChunksPerBlock &&
- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
- maxCopies > 0;
- dev->gcChunk++, oldChunk++) {
- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
-
- /* This page is in use and might need to be copied off */
-
- maxCopies--;
-
- markNAND = 1;
-
- yaffs_InitialiseTags(&tags);
-
- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
- buffer, &tags);
-
- object =
- yaffs_FindObjectByNumber(dev,
- tags.objectId);
-
- T(YAFFS_TRACE_GC_DETAIL,
- (TSTR
- ("Collecting chunk in block %d, %d %d %d " TENDSTR),
- dev->gcChunk, tags.objectId, tags.chunkId,
- tags.byteCount));
-
- if (object && !yaffs_SkipVerification(dev)) {
- if (tags.chunkId == 0)
- matchingChunk = object->hdrChunk;
- else if (object->softDeleted)
- matchingChunk = oldChunk; /* Defeat the test */
- else
- matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
-
- if (oldChunk != matchingChunk)
- T(YAFFS_TRACE_ERROR,
- (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
- oldChunk, matchingChunk, tags.objectId, tags.chunkId));
-
- }
-
- if (!object) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("page %d in gc has no object: %d %d %d "
- TENDSTR), oldChunk,
- tags.objectId, tags.chunkId, tags.byteCount));
- }
-
- if (object &&
- object->deleted &&
- object->softDeleted &&
- tags.chunkId != 0) {
- /* Data chunk in a soft deleted file, throw it away
- * It's a soft deleted data chunk,
- * No need to copy this, just forget about it and
- * fix up the object.
- */
-
- object->nDataChunks--;
-
- if (object->nDataChunks <= 0) {
- /* remeber to clean up the object */
- dev->gcCleanupList[cleanups] =
- tags.objectId;
- cleanups++;
- }
- markNAND = 0;
- } else if (0) {
- /* Todo object && object->deleted && object->nDataChunks == 0 */
- /* Deleted object header with no data chunks.
- * Can be discarded and the file deleted.
- */
- object->hdrChunk = 0;
- yaffs_FreeTnode(object->myDev,
- object->variant.
- fileVariant.top);
- object->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(object);
-
- } else if (object) {
- /* It's either a data chunk in a live file or
- * an ObjectHeader, so we're interested in it.
- * NB Need to keep the ObjectHeaders of deleted files
- * until the whole file has been deleted off
- */
- tags.serialNumber++;
-
- dev->nGCCopies++;
-
- if (tags.chunkId == 0) {
- /* It is an object Id,
- * We need to nuke the shrinkheader flags first
- * We no longer want the shrinkHeader flag since its work is done
- * and if it is left in place it will mess up scanning.
- */
-
- yaffs_ObjectHeader *oh;
- oh = (yaffs_ObjectHeader *)buffer;
- oh->isShrink = 0;
- tags.extraIsShrinkHeader = 0;
-
- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
- }
-
- newChunk =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
-
- if (newChunk < 0) {
- retVal = YAFFS_FAIL;
- } else {
-
- /* Ok, now fix up the Tnodes etc. */
-
- if (tags.chunkId == 0) {
- /* It's a header */
- object->hdrChunk = newChunk;
- object->serial = tags.serialNumber;
- } else {
- /* It's a data chunk */
- yaffs_PutChunkIntoFile
- (object,
- tags.chunkId,
- newChunk, 0);
- }
- }
- }
-
- if (retVal == YAFFS_OK)
- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
-
- }
- }
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
-
-
- /* Do any required cleanups */
- for (i = 0; i < cleanups; i++) {
- /* Time to delete the file too */
- object =
- yaffs_FindObjectByNumber(dev,
- dev->gcCleanupList[i]);
- if (object) {
- yaffs_FreeTnode(dev,
- object->variant.fileVariant.
- top);
- object->variant.fileVariant.top = NULL;
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: About to finally delete object %d"
- TENDSTR), object->objectId));
- yaffs_DoGenericObjectDeletion(object);
- object->myDev->nDeletedFiles--;
- }
-
- }
-
- }
-
- yaffs_VerifyCollectedBlock(dev, bi, block);
-
- chunksAfter = yaffs_GetErasedChunks(dev);
- if (chunksBefore >= chunksAfter) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("gc did not increase free chunks before %d after %d"
- TENDSTR), chunksBefore, chunksAfter));
- }
-
- /* If the gc completed then clear the current gcBlock so that we find another. */
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
- dev->gcBlock = -1;
- dev->gcChunk = 0;
- }
-
- dev->isDoingGC = 0;
-
- return retVal;
-}
-
-/* New garbage collector
- * If we're very low on erased blocks then we do aggressive garbage collection
- * otherwise we do "leasurely" garbage collection.
- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
- *
- * The idea is to help clear out space in a more spread-out manner.
- * Dunno if it really does anything useful.
- */
-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
-{
- int block;
- int aggressive;
- int gcOk = YAFFS_OK;
- int maxTries = 0;
-
- 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 = yaffs_CalcCheckpointBlocksRequired(dev) - 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;
- }
-
- if (dev->gcBlock <= 0) {
- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
- dev->gcChunk = 0;
- }
-
- block = dev->gcBlock;
-
- 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, aggressive);
- }
-
- 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);
- }
-
- 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)
- 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
- */
-
- if (inScan > 0) {
- 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);
- }
-
- }
-
-}
-
-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;
-
- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
- YBUG();
- }
-
- 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, _Y("silly old name"));
-
-
- if (!in->fake ||
- in == dev->rootDir || /* The rootDir should also be saved */
- force) {
-
- yaffs_CheckGarbageCollection(dev);
- yaffs_CheckObjectDetailsLoaded(in);
-
- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
- oh = (yaffs_ObjectHeader *) buffer;
-
- prevChunkId = in->hdrChunk;
-
- 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 = oh->inbandShadowsObject = 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->hdrChunk = 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;
-
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (!dev->srCache[i].object)
- return &dev->srCache[i];
- }
- }
-
- 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->hdrChunk = obj->hdrChunk;
- 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 int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
-{
-
- yaffs_Object *parent;
-
- if (obj->variantType != cp->variantType) {
- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
- TCONT("chunk %d does not match existing object type %d")
- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
- obj->variantType));
- return 0;
- }
-
- obj->objectId = cp->objectId;
-
- if (cp->parentId)
- parent = yaffs_FindOrCreateObjectByNumber(
- obj->myDev,
- cp->parentId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- else
- parent = NULL;
-
- if (parent) {
- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
- TCONT(" chunk %d Parent type, %d, not directory")
- TENDSTR),
- cp->objectId, cp->parentId, cp->variantType,
- cp->hdrChunk, parent->variantType));
- return 0;
- }
- yaffs_AddObjectToDirectory(parent, obj);
- }
-
- obj->hdrChunk = cp->hdrChunk;
- 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->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 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 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
-
- 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;
- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
- }
- }
-
- 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;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
-
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
-
-
- tn = yaffs_GetTnodeRaw(dev);
- if (tn)
- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
- 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 ylist_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++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_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.hdrChunk, (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.hdrChunk));
-
- if (ok && cp.objectId == ~0)
- done = 1;
- else if (ok) {
- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
- if (obj) {
- ok = yaffs_CheckpointObjectToObject(obj, &cp);
- if (!ok)
- break;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_ReadCheckpointTnodes(obj);
- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = obj;
- }
- } else
- ok = 0;
- }
- }
-
- 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;
- __u32 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
- * or we're using inband tags then use the cache (if there is caching)
- * else bypass the cache.
- */
- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- 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;
-
-
- memcpy(buffer, &cache->data[start], nToCopy);
-
- cache->locked = 0;
- } else {
- /* Read into the local buffer then copy..*/
-
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
-
- memcpy(buffer, &localBuffer[start], nToCopy);
-
-
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
- }
-
- } else {
-
- /* A full chunk. Read directly into the supplied buffer. */
- yaffs_ReadChunkDataFromObject(in, chunk, buffer);
-
- }
-
- 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;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- int nToWriteBack;
- int startOfWrite = offset;
- int chunkWritten = 0;
- __u32 nBytesRead;
- __u32 chunkStart;
-
- 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);
-
- if (chunk * dev->nDataBytesPerChunk + start != offset ||
- start >= dev->nDataBytesPerChunk) {
- T(YAFFS_TRACE_ERROR, (
- TSTR("AddrToChunk of offset %d gives chunk %d start %d"
- TENDSTR),
- (int)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.
- */
-
- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
-
- if (chunkStart > in->variant.fileVariant.fileSize)
- nBytesRead = 0; /* Past end of file */
- else
- nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
-
- if (nBytesRead > dev->nDataBytesPerChunk)
- nBytesRead = dev->nDataBytesPerChunk;
-
- nToWriteBack =
- (nBytesRead >
- (start + n)) ? nBytesRead : (start + n);
-
- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
- YBUG();
-
- } else {
- nToCopy = dev->nDataBytesPerChunk - start;
- nToWriteBack = dev->nDataBytesPerChunk;
- }
-
- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- /* An incomplete start or end chunk (or maybe both start and end chunk),
- * or we're using inband tags, so we want to use the cache buffers.
- */
- 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;
-
-
- memcpy(&cache->data[start], buffer,
- nToCopy);
-
-
- 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);
-
-
-
- memcpy(&localBuffer[start], buffer, nToCopy);
-
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk,
- localBuffer,
- nToWriteBack,
- 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);
-
- /* 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;
- __u32 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_FAIL;
-
- if (newSize == oldFileSize)
- return YAFFS_OK;
-
- 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 &&
- in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- in->parent->objectId != YAFFS_OBJECTID_DELETED)
- yaffs_UpdateObjectHeader(in, NULL, 0,
- (newSize < oldFileSize) ? 1 : 0, 0);
-
- return YAFFS_OK;
-}
-
-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, _Y("deleted"), 0, 0);
-
- }
-
- yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
- in->hdrChunk = 0;
-
- 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_UnlinkFileIfNeeded(yaffs_Object *in)
-{
-
- int retVal;
- int immediateDeletion = 0;
-
-#ifdef __KERNEL__
- if (!in->myInode)
- immediateDeletion = 1;
-#else
- if (in->inUse <= 0)
- immediateDeletion = 1;
-#endif
-
- if (immediateDeletion) {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
- _Y("deleted"), 0, 0);
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
- in->objectId));
- in->deleted = 1;
- in->myDev->nDeletedFiles++;
- if (1 || in->myDev->isYaffs2)
- yaffs_ResizeFile(in, 0);
- yaffs_SoftDeleteFile(in);
- } else {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
- }
-
-
- return retVal;
-}
-
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
- int deleted = in->deleted;
-
- yaffs_ResizeFile(in, 0);
-
- if (in->nDataChunks > 0) {
- /* Use soft deletion if there is data in the file.
- * That won't be the case if it has been resized to zero.
- */
- if (!in->unlinked)
- retVal = yaffs_UnlinkFileIfNeeded(in);
-
- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
- in->deleted = 1;
- deleted = 1;
- in->myDev->nDeletedFiles++;
- yaffs_SoftDeleteFile(in);
- }
- return 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 (ylist_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
- */
- ylist_del_init(&in->hardLinks);
- return yaffs_DoGenericObjectDeletion(in);
-}
-
-int yaffs_DeleteObject(yaffs_Object *obj)
-{
-int retVal = -1;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- retVal = yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- retVal = yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- retVal = yaffs_DeleteHardLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- retVal = yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- retVal = 0;
- break; /* should not happen. */
- }
-
- return retVal;
-}
-
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
-{
-
- int immediateDeletion = 0;
-
-#ifdef __KERNEL__
- if (!obj->myInode)
- immediateDeletion = 1;
-#else
- if (obj->inUse <= 0)
- immediateDeletion = 1;
-#endif
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- return yaffs_DeleteHardLink(obj);
- } else if (!ylist_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 = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
-
- ylist_del_init(&hl->hardLinks);
- ylist_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 if (immediateDeletion) {
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_DeleteFile(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;
- }
- } else
- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
-}
-
-
-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);
- if (!obj)
- return;
- 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;
- ylist_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;
- YINIT_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;
-}
-
-
-struct yaffs_ShadowFixerStruct {
- int objectId;
- int shadowedId;
- struct yaffs_ShadowFixerStruct *next;
-};
-
-
-static void yaffs_StripDeletedObjects(yaffs_Device *dev)
-{
- /*
- * Sort out state of unlinked and deleted objects after scanning.
- */
- struct ylist_head *i;
- struct ylist_head *n;
- yaffs_Object *l;
-
- /* Soft delete all the unlinked files */
- ylist_for_each_safe(i, n,
- &dev->unlinkedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
- }
- }
-
- ylist_for_each_safe(i, n,
- &dev->deletedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
- }
- }
-
-}
-
-static int yaffs_Scan(yaffs_Device *dev)
-{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int result;
-
- int chunk;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
-
- int alloc_failed = 0;
-
- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
-
-
- __u8 *chunkData;
-
-
-
- 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;
-
- /* 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_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
-
- 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;
- }
- }
-
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
-
- /* For each block.... */
- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
- blockIterator++) {
-
- YYIELD();
-
- YYIELD();
-
- 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 (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || 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. */
-
- }
-
- 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_DeleteObject(in);
-
- in = 0;
- }
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- oh->type);
-
- if (!in)
- alloc_failed = 1;
-
- if (in && oh->shadowsObject > 0) {
-
- struct yaffs_ShadowFixerStruct *fixer;
- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
- if (fixer) {
- fixer->next = shadowFixerList;
- shadowFixerList = fixer;
- fixer->objectId = tags.objectId;
- fixer->shadowedId = oh->shadowsObject;
- }
-
- }
-
- 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 (((existingSerial + 1) & 3) == newSerial) {
- /* Use new one - destroy the exisiting one */
- yaffs_DeleteChunk(dev,
- in->hdrChunk,
- 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->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- } 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->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- 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)
- alloc_failed = 1;
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || 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->useHeaderFileSize)
-
- in->variant.fileVariant.
- fileSize =
- oh->fileSize;
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.
- equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_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);
- }
-
- }
-
-
- /* 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);
-
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
-
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
- */
- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
- if (obj)
- yaffs_DeleteObject(obj);
-
- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
-
- if (obj)
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
-
- YFREE(fixer);
- }
- }
-
- 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;
- yaffs_ExtendedTags tags;
- int result;
- int alloc_failed = 0;
-
- if (!in)
- return;
-
- dev = in->myDev;
-
-#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->hdrChunk > 0) {
- in->lazyLoaded = 0;
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, 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;
- __u32 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;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
-
- 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 (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 {
- /* 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
- {
- /* Use qsort now. */
- 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; ??? TODO */
- bi->gcPrioritise = 1;
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Partially written block %d detected" TENDSTR),
- blk));
- }
- }
- }
-
- dev->nFreeChunks++;
-
- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
- T(YAFFS_TRACE_SCAN,
- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
- blk, c));
-
- 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)
- alloc_failed = 1;
- }
-
- 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 (dev->inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
-
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
- }
-
- }
-
- 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));
- continue;
- }
-
- 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;
-
-
- 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 && in->variantType !=
- (oh ? oh->type : tags.extraObjectType))
- T(YAFFS_TRACE_ERROR, (
- TSTR("yaffs tragedy: Bad object type, "
- TCONT("%d != %d, for object %d at chunk ")
- TCONT("%d during scan")
- TENDSTR), oh ?
- oh->type : tags.extraObjectType,
- in->variantType, tags.objectId,
- chunk));
-
- 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->hdrChunk = chunk;
-
- } else if (!in->valid) {
- /* we need to load this info */
-
- in->valid = 1;
- in->hdrChunk = 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;
-
- if (!parent)
- alloc_failed = 1;
-
- /* directory stuff...
- * hook up to parent
- */
-
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || 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 ylist_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);
-
-
- 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_VerifyObjectInDirectory(yaffs_Object *obj)
-{
- struct ylist_head *lh;
- yaffs_Object *listObj;
-
- int count = 0;
-
- if (!obj) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
- YBUG();
- return;
- }
-
- if (yaffs_SkipVerification(obj->myDev))
- return;
-
- if (!obj->parent) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
- YBUG();
- return;
- }
-
- if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
- YBUG();
- }
-
- /* Iterate through the objects in each hash entry */
-
- ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
- if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- yaffs_VerifyObject(listObj);
- if (obj == listObj)
- count++;
- }
- }
-
- if (count != 1) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
- YBUG();
- }
-}
-
-static void yaffs_VerifyDirectory(yaffs_Object *directory)
-{
- struct ylist_head *lh;
- yaffs_Object *listObj;
-
- if (!directory) {
- YBUG();
- return;
- }
-
- if (yaffs_SkipFullVerification(directory->myDev))
- return;
-
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
- YBUG();
- }
-
- /* Iterate through the objects in each hash entry */
-
- ylist_for_each(lh, &directory->variant.directoryVariant.children) {
- if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- if (listObj->parent != directory) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
- YBUG();
- }
- yaffs_VerifyObjectInDirectory(listObj);
- }
- }
-}
-
-
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
-{
- yaffs_Device *dev = obj->myDev;
- yaffs_Object *parent;
-
- yaffs_VerifyObjectInDirectory(obj);
- parent = obj->parent;
-
- yaffs_VerifyDirectory(parent);
-
- if (dev && dev->removeObjectCallback)
- dev->removeObjectCallback(obj);
-
-
- ylist_del_init(&obj->siblings);
- obj->parent = NULL;
-
- yaffs_VerifyDirectory(parent);
-}
-
-
-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();
- return;
- }
- 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 */
- YBUG();
- }
-
-
- yaffs_VerifyDirectory(directory);
-
- yaffs_RemoveObjectFromDirectory(obj);
-
-
- /* Now add it */
- ylist_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_VerifyDirectory(directory);
- yaffs_VerifyObjectInDirectory(obj);
-}
-
-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
- const YCHAR *name)
-{
- int sum;
-
- struct ylist_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();
- return NULL;
- }
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
- YBUG();
- }
-
- sum = yaffs_CalcNameSum(name);
-
- ylist_for_each(i, &directory->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
-
- if (l->parent != directory)
- YBUG();
-
- 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->hdrChunk <= 0) {
- /* LostnFound chunk 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 ylist_head *i;
- yaffs_Object *l;
-
- if (!theDir) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: null pointer directory"
- TENDSTR)));
- YBUG();
- return YAFFS_FAIL;
- }
- if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
- YBUG();
- return YAFFS_FAIL;
- }
-
- ylist_for_each(i, &theDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_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->hdrChunk <= 0) {
- YCHAR locName[20];
- YCHAR numString[20];
- YCHAR *x = &numString[19];
- unsigned v = obj->objectId;
- numString[19] = 0;
- while (v > 0) {
- x--;
- *x = '0' + (v % 10);
- v /= 10;
- }
- /* make up a name */
- yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
- yaffs_strcat(locName, x);
- 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->hdrChunk > 0) {
- result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
- obj->hdrChunk, 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 ylist_head *i;
-
- if (!obj->unlinked)
- count++; /* the object itself */
-
- ylist_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->hdrChunk,
- 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;
-
- dev->gcBlock = -1;
-
- 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->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
- (dev->inbandTags && !dev->isYaffs2) ||
- 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, inbandTags %d "
- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
- return YAFFS_FAIL;
- }
-
- if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Sort out space for inband tags, if required */
- if (dev->inbandTags)
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
- else
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
-
- /* 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:
- */
- x = dev->nDataBytesPerChunk;
- /* We always use dev->chunkShift and dev->chunkDiv */
- dev->chunkShift = Shifts(x);
- x >>= dev->chunkShift;
- dev->chunkDiv = x;
- /* We only use chunk mask if chunkDiv is 1 */
- dev->chunkMask = (1<<dev->chunkShift) - 1;
-
- /*
- * 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;
- void *buf;
- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
-
- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
-
- dev->srCache = YMALLOC(srCacheBytes);
-
- buf = (__u8 *) dev->srCache;
-
- 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->totalBytesPerChunk);
- }
- 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)) {
- yaffs_CheckObjectDetailsLoaded(dev->rootDir);
- 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;
-
- yaffs_StripDeletedObjects(dev);
- }
-
- 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;
-
- if (dev->deinitialiseNAND)
- dev->deinitialiseNAND(dev);
- }
-}
-
-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;
- int i;
-
-#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 */
-
- 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 = yaffs_CalcCheckpointBlocksRequired(dev) - 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) \
- do { \
- 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; \
- } \
- } while (0)
-
-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
-#ifndef CONFIG_YAFFS_WINCE
- yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
-#endif
- return YAFFS_OK;
-}
+++ /dev/null
-/*
- * 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 6
-
-/* 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
-
-/* Special sequence number for bad block that failed to be marked bad */
-#define YAFFS_SEQUENCE_BAD_BLOCK 0xFFFF0000
-
-/* 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 byteCountLSB:10;
- unsigned objectId:18;
- unsigned ecc:12;
- unsigned byteCountMSB: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 */
- unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
- __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];
-
- /* The 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];
-#else
- __u32 roomToGrow[6];
-
-#endif
- __u32 inbandShadowsObject;
- __u32 inbandIsShrink;
-
- __u32 reservedSpace[2];
- 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 ylist_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 beingCreated:1; /* This object is still being created so skip some checks. */
-
- __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 ylist_head hashLink; /* list of objects in this hash bucket */
-
- struct ylist_head hardLinks; /* all the equivalent hard linked objects */
-
- /* directory structure stuff */
- /* also used for linking up the free list */
- struct yaffs_ObjectStruct *parent;
- struct ylist_head siblings;
-
- /* Where's my object header in NAND? */
- int hdrChunk;
-
- 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 ylist_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 hdrChunk;
- 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 ylist_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 spareBytesPerChunk; /* 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);
- int (*deinitialiseNAND) (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, __u32 *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 */
-
- YCHAR *pathDividers; /* String of legal path dividers */
-
-
- /* 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 for figuring out file offset to chunk conversions */
- __u32 chunkShift; /* Shift value */
- __u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */
- __u32 chunkMask; /* Mask to use for power-of-2 case */
-
- /* Stuff to handle inband tags */
- int inbandTags;
- __u32 totalBytesPerChunk;
-
-#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;
-
- int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */
-
- /* 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 gcBlock;
- int gcChunk;
-
- int nObjectsCreated;
- yaffs_Object *freeObjects;
- int nFreeObjects;
-
- int nHardLinks;
-
- 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. */
-
-
- /* Temporary buffer management */
- yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
- int maxTemp;
- int tempInUse;
- 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 block 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;
-
-
-/*----------------------- 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_DeleteObject(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);
-
-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
-
-#endif
+++ /dev/null
-/*
- * 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$";
-
-#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 (MTD_VERSION_CODE < MTD_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 (MTD_VERSION_CODE > MTD_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 (MTD_VERSION_CODE > MTD_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 (MTD_VERSION_CODE > MTD_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 (MTD_VERSION_CODE > MTD_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 (MTD_VERSION_CODE > MTD_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;
-}
-
+++ /dev/null
-/*
- * 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"
-
-#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
-extern struct nand_oobinfo yaffs_oobinfo;
-extern struct nand_oobinfo yaffs_noeccinfo;
-#endif
-
-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
+++ /dev/null
-/*
- * 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 (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
-
-const char *yaffs_mtdif1_c_version = "$Id$";
-
-#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 (MTD_VERSION_CODE < MTD_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\n", 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, __u32 *pSequenceNumber)
-{
- struct mtd_info *mtd = dev->genericDevice;
- int chunkNo = blockNo * dev->nChunksPerBlock;
- loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
- 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);
- etags.blockBad = (mtd->block_isbad)(mtd, addr);
- if (etags.blockBad) {
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
- "block %d is marked bad\n", blockNo);
- state = YAFFS_BLOCK_STATE_DEAD;
- } else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
- /* bad tags, need to look more closely */
- state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
- } 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 /*MTD_VERSION*/
+++ /dev/null
-/*
- * 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, __u32 *sequenceNumber);
-
-#endif
+++ /dev/null
-/*
- * 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$";
-
-#include "yportenv.h"
-
-
-#include "yaffs_mtdif2.h"
-
-#include "linux/mtd/mtd.h"
-#include "linux/types.h"
-#include "linux/time.h"
-
-#include "yaffs_packedtags2.h"
-
-/* NB For use with inband tags....
- * We assume that the data buffer is of size totalBytersPerChunk so that we can also
- * use it to load the tags.
- */
-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 (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- struct mtd_oob_ops ops;
-#else
- size_t dummy;
-#endif
- int retval = 0;
-
- loff_t addr;
-
- yaffs_PackedTags2 pt;
-
- T(YAFFS_TRACE_MTD,
- (TSTR
- ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
- TENDSTR), chunkInNAND, data, tags));
-
-
- addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
-
- /* For yaffs2 writing there must be both data and tags.
- * If we're using inband tags, then the tags are stuffed into
- * the end of the data buffer.
- */
- if (!data || !tags)
- BUG();
- else if (dev->inbandTags) {
- yaffs_PackedTags2TagsPart *pt2tp;
- pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
- yaffs_PackTags2TagsPart(pt2tp, tags);
- } else
- yaffs_PackTags2(&pt, tags);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- ops.mode = MTD_OOB_AUTO;
- ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
- ops.len = dev->totalBytesPerChunk;
- ops.ooboffs = 0;
- ops.datbuf = (__u8 *)data;
- ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
- retval = mtd->write_oob(mtd, addr, &ops);
-
-#else
- if (!dev->inbandTags) {
- retval =
- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, (__u8 *) &pt, NULL);
- } else {
- retval =
- mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
- data);
- }
-#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 (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- struct mtd_oob_ops ops;
-#endif
- size_t dummy;
- int retval = 0;
- int localData = 0;
-
- loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
-
- yaffs_PackedTags2 pt;
-
- T(YAFFS_TRACE_MTD,
- (TSTR
- ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
- TENDSTR), chunkInNAND, data, tags));
-
- if (dev->inbandTags) {
-
- if (!data) {
- localData = 1;
- data = yaffs_GetTempBuffer(dev, __LINE__);
- }
-
-
- }
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- if (dev->inbandTags || (data && !tags))
- retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
- &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 (!dev->inbandTags && data && tags) {
-
- 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 (!dev->inbandTags && tags)
- retval =
- mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
- dev->spareBuffer);
- }
-#endif
-
-
- if (dev->inbandTags) {
- if (tags) {
- yaffs_PackedTags2TagsPart *pt2tp;
- pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
- yaffs_UnpackTags2TagsPart(tags, pt2tp);
- }
- } else {
- if (tags) {
- memcpy(&pt, dev->spareBuffer, sizeof(pt));
- yaffs_UnpackTags2(tags, &pt);
- }
- }
-
- if (localData)
- yaffs_ReleaseTempBuffer(dev, data, __LINE__);
-
- 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->totalBytesPerChunk);
-
- if (retval == 0)
- return YAFFS_OK;
- else
- return YAFFS_FAIL;
-
-}
-
-int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
- yaffs_BlockState *state, __u32 *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->totalBytesPerChunk);
-
- 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;
-}
-
+++ /dev/null
-/*
- * 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, __u32 *sequenceNumber);
-
-#endif
+++ /dev/null
-/*
- * 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$";
-
-#include "yaffs_nand.h"
-#include "yaffs_tagscompat.h"
-#include "yaffs_tagsvalidity.h"
-
-#include "yaffs_getblockinfo.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,
- __u32 *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);
-}
-
-
-
+++ /dev/null
-/*
- * 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
-
+++ /dev/null
-/*
- * 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,
- const 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, __u32 *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
+++ /dev/null
-/*
- * 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));
- }
-}
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * 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_DumpPackedTags2TagsPart(const yaffs_PackedTags2TagsPart *ptt)
-{
- T(YAFFS_TRACE_MTD,
- (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
- ptt->objectId, ptt->chunkId, ptt->byteCount,
- ptt->sequenceNumber));
-}
-static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
-{
- yaffs_DumpPackedTags2TagsPart(&pt->t);
-}
-
-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_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt,
- const yaffs_ExtendedTags *t)
-{
- ptt->chunkId = t->chunkId;
- ptt->sequenceNumber = t->sequenceNumber;
- ptt->byteCount = t->byteCount;
- ptt->objectId = t->objectId;
-
- if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
- /* Store the extra header info instead */
- /* We save the parent object in the chunkId */
- ptt->chunkId = EXTRA_HEADER_INFO_FLAG
- | t->extraParentObjectId;
- if (t->extraIsShrinkHeader)
- ptt->chunkId |= EXTRA_SHRINK_FLAG;
- if (t->extraShadows)
- ptt->chunkId |= EXTRA_SHADOWS_FLAG;
-
- ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
- ptt->objectId |=
- (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
-
- if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
- ptt->byteCount = t->extraEquivalentObjectId;
- else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
- ptt->byteCount = t->extraFileLength;
- else
- ptt->byteCount = 0;
- }
-
- yaffs_DumpPackedTags2TagsPart(ptt);
- yaffs_DumpTags2(t);
-}
-
-
-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
-{
- yaffs_PackTags2TagsPart(&pt->t, t);
-
-#ifndef YAFFS_IGNORE_TAGS_ECC
- {
- yaffs_ECCCalculateOther((unsigned char *)&pt->t,
- sizeof(yaffs_PackedTags2TagsPart),
- &pt->ecc);
- }
-#endif
-}
-
-
-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t,
- yaffs_PackedTags2TagsPart *ptt)
-{
-
- memset(t, 0, sizeof(yaffs_ExtendedTags));
-
- yaffs_InitialiseTags(t);
-
- if (ptt->sequenceNumber != 0xFFFFFFFF) {
- t->blockBad = 0;
- t->chunkUsed = 1;
- t->objectId = ptt->objectId;
- t->chunkId = ptt->chunkId;
- t->byteCount = ptt->byteCount;
- t->chunkDeleted = 0;
- t->serialNumber = 0;
- t->sequenceNumber = ptt->sequenceNumber;
-
- /* Do extra header info stuff */
-
- if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) {
- t->chunkId = 0;
- t->byteCount = 0;
-
- t->extraHeaderInfoAvailable = 1;
- t->extraParentObjectId =
- ptt->chunkId & (~(ALL_EXTRA_FLAGS));
- t->extraIsShrinkHeader =
- (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
- t->extraShadows =
- (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
- t->extraObjectType =
- ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT;
- t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
-
- if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
- t->extraEquivalentObjectId = ptt->byteCount;
- else
- t->extraFileLength = ptt->byteCount;
- }
- }
-
- yaffs_DumpPackedTags2TagsPart(ptt);
- yaffs_DumpTags2(t);
-
-}
-
-
-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
-{
-
- yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
-
- if (pt->t.sequenceNumber != 0xFFFFFFFF) {
- /* Page is in use */
-#ifndef YAFFS_IGNORE_TAGS_ECC
- {
- 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:
- eccResult = YAFFS_ECC_RESULT_NO_ERROR;
- break;
- case 1:
- eccResult = YAFFS_ECC_RESULT_FIXED;
- break;
- case -1:
- eccResult = YAFFS_ECC_RESULT_UNFIXED;
- break;
- default:
- eccResult = YAFFS_ECC_RESULT_UNKNOWN;
- }
- }
-#endif
- }
-
- yaffs_UnpackTags2TagsPart(t, &pt->t);
-
- t->eccResult = eccResult;
-
- yaffs_DumpPackedTags2(pt);
- yaffs_DumpTags2(t);
-
-}
-
+++ /dev/null
-/*
- * 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;
-
-/* Full packed tags with ECC, used for oob tags */
-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
-
-/* Only the tags part (no ECC for use with inband tags */
-void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt);
-#endif
+++ /dev/null
-/*
- * 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) do { \
- 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); \
-} while (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 yswap(a, b) do { \
- if (swaptype == 0) { \
- long t = *(long *)(a); \
- *(long *)(a) = *(long *)(b); \
- *(long *)(b) = t; \
- } else \
- swapfunc(a, b, es, swaptype); \
-} while (0)
-
-#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)
- yswap(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);
- }
- yswap(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;
- yswap(pa, pb);
- pa += es;
- }
- pb += es;
- }
- while (pb <= pc && (r = cmp(pc, a)) >= 0) {
- if (r == 0) {
- swap_cnt = 1;
- yswap(pc, pd);
- pd -= es;
- }
- pc -= es;
- }
- if (pb > pc)
- break;
- yswap(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)
- yswap(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);
- r = pb - pa;
- if (r > es)
- yaffs_qsort(a, r / es, es, cmp);
- r = pd - pc;
- if (r > 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);*/
-}
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * 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"
-#include "yaffs_getblockinfo.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;
-
- memset(&nspare, 0, sizeof(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;
- 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 + dev->blockOffset)->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.byteCountLSB = eTags->byteCount & 0x3ff;
-
- if (dev->nDataBytesPerChunk >= 1024)
- tags.byteCountMSB = (eTags->byteCount >> 10) & 3;
- else
- tags.byteCountMSB = 3;
-
-
- 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 = YAFFS_ECC_RESULT_UNKNOWN;
-
- 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.byteCountLSB;
-
- if (dev->nDataBytesPerChunk >= 1024)
- eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10);
-
- 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,
- __u32 *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;
-}
+++ /dev/null
-/*
- * 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,
- __u32 *sequenceNumber);
-
-void yaffs_CalcTagsECC(yaffs_Tags *tags);
-int yaffs_CheckECCOnTags(yaffs_Tags *tags);
-int yaffs_CountBits(__u8 byte);
-
-#endif
+++ /dev/null
-/*
- * 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);
-
-}
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * 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__
-
-/*
- * Define the MTD version in terms of Linux Kernel versions
- * This allows yaffs to be used independantly of the kernel
- * as well as with it.
- */
-
-#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
-
-#if defined CONFIG_YAFFS_WINCE
-
-#include "ywinceenv.h"
-
-#elif defined __KERNEL__
-
-#include "moduleconfig.h"
-
-/* Linux kernel */
-
-#include <linux/version.h>
-#define MTD_VERSION_CODE LINUX_VERSION_CODE
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-#include <linux/config.h>
-#endif
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sched.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_strcat(a, b) strcat(a, b)
-#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_NOFS)
-#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 TCONT(x) 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
-
-#define MTD_VERSION_CODE MTD_VERSION(2, 6, 22)
-
-/* 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_strcat(a, b) strcat(a, b)
-#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 YBUG
-#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
-#endif
-
-#endif
projects / firefly-linux-kernel-4.4.55.git / commitdiff