/*
- * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
#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 a Y=0x59,
+ * Give us an A=0x41,
+ * Give us an FF=0xFF
* Give us an S=0x53
- * And what have we got...
+ * And what have we got...
*/
#define YAFFS_MAGIC 0x5941FF53
#define YAFFS_OBJECT_SPACE 0x40000
-#define YAFFS_CHECKPOINT_VERSION 3
+#define YAFFS_CHECKPOINT_VERSION 4
#ifdef CONFIG_YAFFS_UNICODE
#define YAFFS_MAX_NAME_LENGTH 127
#define YAFFS_OBJECTID_UNLINKED 3
#define YAFFS_OBJECTID_DELETED 4
-/* Sseudo object ids for checkpointing */
+/* Pseudo object ids for checkpointing */
#define YAFFS_OBJECTID_SB_HEADER 0x10
#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-/* */
#define YAFFS_MAX_SHORT_OP_CACHES 20
-#define YAFFS_N_TEMP_BUFFERS 4
+#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,
+ * 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 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;
typedef struct {
unsigned chunkId:20;
unsigned serialNumber:2;
- unsigned byteCount:10;
+ unsigned byteCountLSB:10;
unsigned objectId:18;
unsigned ecc:12;
- unsigned unusedStuff:2;
-
+ unsigned byteCountMSB:2;
} yaffs_Tags;
typedef union {
/* The following stuff only has meaning when we read */
yaffs_ECCResult eccResult;
- unsigned blockBad;
+ unsigned blockBad;
/* YAFFS 1 stuff */
unsigned chunkDeleted; /* The chunk is marked deleted */
YAFFS_BLOCK_STATE_UNKNOWN = 0,
YAFFS_BLOCK_STATE_SCANNING,
+ /* Being scanned */
+
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 block is empty */
YAFFS_BLOCK_STATE_ALLOCATING,
- /* This block is partially allocated.
+ /* 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
+ * allocation. Should never be more than one of these.
+ * If a block is only partially allocated at mount it is treated as full.
*/
- YAFFS_BLOCK_STATE_FULL,
+ YAFFS_BLOCK_STATE_FULL,
/* All the pages in this block have been allocated.
+ * If a block was only partially allocated when mounted we treat
+ * it as fully allocated.
*/
YAFFS_BLOCK_STATE_DIRTY,
- /* All pages have been allocated and deleted.
+ /* The block was full and now all chunks have been deleted.
* Erase me, reuse me.
*/
- YAFFS_BLOCK_STATE_CHECKPOINT,
- /* This block is assigned to holding checkpoint data.
- */
+ YAFFS_BLOCK_STATE_CHECKPOINT,
+ /* This block is assigned to holding checkpoint data. */
- YAFFS_BLOCK_STATE_COLLECTING,
+ YAFFS_BLOCK_STATE_COLLECTING,
/* This block is being garbage collected */
- YAFFS_BLOCK_STATE_DEAD
+ YAFFS_BLOCK_STATE_DEAD
/* This block has failed and is not in use */
} yaffs_BlockState;
int softDeletions:10; /* number of soft deleted pages */
int pagesInUse:10; /* number of pages in use */
- __u32 blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
+ 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.
+ /* 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 */
+ __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 */
/* Apply to everything */
int parentObjectId;
- __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
+ __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
- /* Thes following apply to directories, files, symlinks - not hard links */
- __u32 yst_mode; /* protection */
+ /* The following apply to directories, files, symlinks - not hard links */
+ __u32 yst_mode; /* protection */
#ifdef CONFIG_YAFFS_WINCE
__u32 notForWinCE[5];
__u32 win_ctime[2];
__u32 win_atime[2];
__u32 win_mtime[2];
- __u32 roomToGrow[4];
#else
- __u32 roomToGrow[10];
+ __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) */
} yaffs_FileStructure;
typedef struct {
- struct list_head children; /* list of child links */
+ struct ylist_head children; /* list of child links */
+ struct ylist_head dirty; /* Entry for list of dirty directories */
} yaffs_DirectoryStructure;
typedef struct {
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 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
+ __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).
*/
* 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 isShadowed:1; /* This object is shadowed on the way to being renamed. */
__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 yaffs_DeviceStruct *myDev; /* The device I'm on */
- struct list_head hashLink; /* list of objects in this hash bucket */
+ struct ylist_head hashLink; /* list of objects in this hash bucket */
- struct list_head hardLinks; /* all the equivalent hard linked objects */
+ 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 list_head siblings;
+ struct yaffs_ObjectStruct *parent;
+ struct ylist_head siblings;
/* Where's my object header in NAND? */
- int chunkId;
+ int hdrChunk;
int nDataChunks; /* Number of data chunks attached to the file. */
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 yst_rdev;
-#ifdef __KERNEL__
- struct inode *myInode;
-
-#endif
+ void *myInode;
yaffs_ObjectType variantType;
typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
typedef struct {
- struct list_head list;
+ struct ylist_head list;
int count;
} yaffs_ObjectBucket;
-/* yaffs_CheckpointObject holds the definition of an object as dumped
+/* yaffs_CheckpointObject holds the definition of an object as dumped
* by checkpointing.
*/
typedef struct {
- int structType;
- __u32 objectId;
+ int structType;
+ __u32 objectId;
__u32 parentId;
- int chunkId;
-
+ int hdrChunk;
yaffs_ObjectType variantType:3;
- __u8 deleted:1;
- __u8 softDeleted:1;
- __u8 unlinked:1;
- __u8 fake:1;
+ __u8 deleted:1;
+ __u8 softDeleted:1;
+ __u8 unlinked:1;
+ __u8 fake:1;
__u8 renameAllowed:1;
__u8 unlinkAllowed:1;
- __u8 serial;
-
- int nDataChunks;
- __u32 fileSizeOrEquivalentObjectId;
+ __u8 serial;
-}yaffs_CheckpointObject;
+ int nDataChunks;
+ __u32 fileSizeOrEquivalentObjectId;
+} yaffs_CheckpointObject;
/*--------------------- Temporary buffers ----------------
*
/*----------------- Device ---------------------------------*/
-struct yaffs_DeviceStruct {
- struct list_head devList;
+
+struct yaffs_DeviceParamStruct {
const char *name;
- /* Entry parameters set up way early. Yaffs sets up the rest.*/
- int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
+ /*
+ * Entry parameters set up way early. Yaffs sets up the rest.
+ * The structure should be zeroed out before use so that unused
+ * and defualt values are zero.
+ */
+
+ int inbandTags; /* Use unband tags */
+ __u32 totalBytesPerChunk; /* Should be >= 512, does not need to be a power of 2 */
int nChunksPerBlock; /* does not need to be a power of 2 */
- int nBytesPerSpare; /* spare area size */
+ 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)
+ * the number of short op caches (don't use too many).
+ * 10 to 20 is a good bet.
*/
+ int useNANDECC; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */
+ int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */
- int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
+ int isYaffs2; /* Use yaffs2 mode on this device */
- int useNANDECC; /* Flag to decide whether or not to use NANDECC */
+ int emptyLostAndFound; /* Auto-empty lost+found directory on mount */
+
+ int refreshPeriod; /* How often we should check to do a block refresh */
+
+ /* Checkpoint control. Can be set before or after initialisation */
+ __u8 skipCheckpointRead;
+ __u8 skipCheckpointWrite;
- 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 (*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, int *sequenceNumber);
+ 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
+ /* The removeObjectCallback function must be supplied by OS flavours that
+ * need it.
+ * yaffs direct uses it to implement the faster readdir.
+ * Linux uses it to protect the directory during unlocking.
*/
void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
+
+ /* Callback to mark the superblock dirty */
+ void (*markSuperBlockDirty)(struct yaffs_DeviceStruct *dev);
- /* Callback to mark the superblock dirsty */
- void (*markSuperBlockDirty)(void * superblock);
-
+ /* Callback to control garbage collection. */
+ unsigned (*gcControl)(struct yaffs_DeviceStruct *dev);
+
+ /* Debug control flags. Don't use unless you know what you're doing */
+ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
+ int disableLazyLoad; /* Disable lazy loading on this device */
int wideTnodesDisabled; /* Set to disable wide tnodes */
+ int disableSoftDelete; /* yaffs 1 only: Set to disable the use of softdeletion. */
-
- /* End of stuff that must be set before initialisation. */
+ int deferDirectoryUpdate; /* Set to defer directory updates */
- /* Checkpoint control. Can be set before or after initialisation */
- __u8 skipCheckpointRead;
- __u8 skipCheckpointWrite;
+};
+
+typedef struct yaffs_DeviceParamStruct yaffs_DeviceParam;
+
+struct yaffs_DeviceStruct {
+ struct yaffs_DeviceParamStruct param;
+
+ /* Context storage. Holds extra OS specific data for this device */
+
+ void *context;
/* Runtime parameters. Set up by YAFFS. */
+ int nDataBytesPerChunk;
- __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
+ /* Non-wide tnode stuff */
+ __u16 chunkGroupBits; /* Number of bits that need to be resolved if
+ * the tnodes are not wide enough.
+ */
__u16 chunkGroupSize; /* == 2^^chunkGroupBits */
-
+
/* Stuff to support wide tnodes */
__u32 tnodeWidth;
__u32 tnodeMask;
-
- /* Stuff to support various file offses to chunk/offset translations */
- /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
- __u32 crumbMask;
- __u32 crumbShift;
- __u32 crumbsPerChunk;
-
- /* Straight shifting for nDataBytesPerChunk being a power of 2 */
- __u32 chunkShift;
- __u32 chunkMask;
-
-#ifdef __KERNEL__
+ /* 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 */
+
- 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 readOnly;
int isCheckpointed;
int internalEndBlock;
int blockOffset;
int chunkOffset;
-
+
/* Runtime checkpointing stuff */
int checkpointPageSequence; /* running sequence number of checkpoint pages */
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.
+ int chunkBitmapStride; /* Number of bytes of chunkBits per block.
* Must be consistent with nChunksPerBlock.
*/
__u32 allocationPage;
int allocationBlockFinder; /* Used to search for next allocation block */
- /* Runtime state */
int nTnodesCreated;
yaffs_Tnode *freeTnodes;
int nFreeTnodes;
yaffs_TnodeList *allocatedTnodeList;
- int isDoingGC;
-
int nObjectsCreated;
yaffs_Object *freeObjects;
int nFreeObjects;
+ int nHardLinks;
+
yaffs_ObjectList *allocatedObjectList;
yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
+ __u32 bucketFinder;
int nFreeChunks;
- int currentDirtyChecker; /* Used to find current dirtiest block */
-
+ /* Garbage collection control */
__u32 *gcCleanupList; /* objects to delete at the end of a GC. */
- /* 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 */
+ unsigned hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
+ unsigned gcDisable;
+ unsigned gcBlockFinder;
+ unsigned gcDirtiest;
+ unsigned gcPagesInUse;
+ unsigned gcNotDone;
+ unsigned gcBlock;
+ unsigned gcChunk;
+ unsigned gcSkip;
/* Special directories */
yaffs_Object *rootDir;
* __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. */
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;
+ unsigned oldestDirtyBlock;
+
+ /* Block refreshing */
+ int refreshSkip; /* A skip down counter. Refresh happens when this gets to zero. */
+
+ /* Dirty directory handling */
+ struct ylist_head dirtyDirectories; /* List of dirty directories */
+
+
+ /* Statistcs */
+ __u32 nPageWrites;
+ __u32 nPageReads;
+ __u32 nBlockErasures;
+ __u32 nErasureFailures;
+ __u32 nGCCopies;
+ __u32 allGCs;
+ __u32 passiveGCs;
+ __u32 oldestDirtyGCs;
+ __u32 backgroundGCs;
+ __u32 nRetriedWrites;
+ __u32 nRetiredBlocks;
+ __u32 eccFixed;
+ __u32 eccUnfixed;
+ __u32 tagsEccFixed;
+ __u32 tagsEccUnfixed;
+ __u32 nDeletions;
+ __u32 nUnmarkedDeletions;
+ __u32 refreshCount;
+ __u32 cacheHits;
};
typedef struct yaffs_DeviceStruct yaffs_Device;
-/* The static layout of bllock usage etc is stored in the super block header */
+/* The static layout of block usage etc is stored in the super block header */
typedef struct {
- int StructType;
+ int StructType;
int version;
int checkpointStartBlock;
int checkpointEndBlock;
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 structType;
int nErasedBlocks;
int allocationBlock; /* Current block being allocated off */
__u32 allocationPage;
/* 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;
+ int structType;
+ __u32 magic;
+ __u32 version;
+ __u32 head;
} yaffs_CheckpointValidity;
-/* Function to manipulate block info */
-static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
- blk));
- YBUG();
- }
- return &dev->blockInfo[blk - dev->internalStartBlock];
-}
/*----------------------- YAFFS Functions -----------------------*/
-int yaffs_GutsInitialise(yaffs_Device * dev);
-void yaffs_Deinitialise(yaffs_Device * dev);
+int yaffs_GutsInitialise(yaffs_Device *dev);
+void yaffs_Deinitialise(yaffs_Device *dev);
-int yaffs_GetNumberOfFreeChunks(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_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+ yaffs_Object *newDir, const YCHAR *newName);
-int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
-int yaffs_DeleteFile(yaffs_Object * obj);
+int yaffs_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_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);
+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);
+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);
+yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid);
+
+int yaffs_FlushFile(yaffs_Object *obj, int updateTime, int dataSync);
/* Flushing and checkpointing */
void yaffs_FlushEntireDeviceCache(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,
+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);
+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_Link(yaffs_Object *parent, const YCHAR *name,
+ yaffs_Object *equivalentObject);
-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
+yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj);
/* Symlink operations */
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
+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);
+ 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,
+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);
+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);
-void yaffs_HandleDeferedFree(yaffs_Object * obj);
-#endif
+void yaffs_UpdateDirtyDirectories(yaffs_Device *dev);
+
+int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency);
/* Debug dump */
-int yaffs_DumpObject(yaffs_Object * obj);
+int yaffs_DumpObject(yaffs_Object *obj);
-void yaffs_GutsTest(yaffs_Device * dev);
+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_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
projects / yaffs2.git / blobdiff