2 * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License version 2.1 as
11 * published by the Free Software Foundation.
13 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
16 #ifndef __YAFFS_GUTS_H__
17 #define __YAFFS_GUTS_H__
19 #include "devextras.h"
29 * And what have we got...
31 #define YAFFS_MAGIC 0x5941FF53
33 #define YAFFS_NTNODES_LEVEL0 16
34 #define YAFFS_TNODES_LEVEL0_BITS 4
35 #define YAFFS_TNODES_LEVEL0_MASK 0xf
37 #define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
38 #define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
39 #define YAFFS_TNODES_INTERNAL_MASK 0x7
40 #define YAFFS_TNODES_MAX_LEVEL 6
42 #ifndef CONFIG_YAFFS_NO_YAFFS1
43 #define YAFFS_BYTES_PER_SPARE 16
44 #define YAFFS_BYTES_PER_CHUNK 512
45 #define YAFFS_CHUNK_SIZE_SHIFT 9
46 #define YAFFS_CHUNKS_PER_BLOCK 32
47 #define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
50 #define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
51 #define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
53 #define YAFFS_MAX_CHUNK_ID 0x000FFFFF
55 #define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
57 #define YAFFS_ALLOCATION_NOBJECTS 100
58 #define YAFFS_ALLOCATION_NTNODES 100
59 #define YAFFS_ALLOCATION_NLINKS 100
61 #define YAFFS_NOBJECT_BUCKETS 256
64 #define YAFFS_OBJECT_SPACE 0x40000
66 #define YAFFS_CHECKPOINT_VERSION 3
68 #ifdef CONFIG_YAFFS_UNICODE
69 #define YAFFS_MAX_NAME_LENGTH 127
70 #define YAFFS_MAX_ALIAS_LENGTH 79
72 #define YAFFS_MAX_NAME_LENGTH 255
73 #define YAFFS_MAX_ALIAS_LENGTH 159
76 #define YAFFS_SHORT_NAME_LENGTH 15
78 /* Some special object ids for pseudo objects */
79 #define YAFFS_OBJECTID_ROOT 1
80 #define YAFFS_OBJECTID_LOSTNFOUND 2
81 #define YAFFS_OBJECTID_UNLINKED 3
82 #define YAFFS_OBJECTID_DELETED 4
84 /* Sseudo object ids for checkpointing */
85 #define YAFFS_OBJECTID_SB_HEADER 0x10
86 #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
87 #define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
91 #define YAFFS_MAX_SHORT_OP_CACHES 20
93 #define YAFFS_N_TEMP_BUFFERS 4
95 /* Sequence numbers are used in YAFFS2 to determine block allocation order.
96 * The range is limited slightly to help distinguish bad numbers from good.
97 * This also allows us to perhaps in the future use special numbers for
99 * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
100 * and is a larger number than the lifetime of a 2GB device.
102 #define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
103 #define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
105 /* ChunkCache is used for short read/write operations.*/
107 struct yaffs_ObjectStruct *object;
111 int nBytes; /* Only valid if the cache is dirty */
112 int locked; /* Can't push out or flush while locked. */
113 #ifdef CONFIG_YAFFS_YAFFS2
116 __u8 data[YAFFS_BYTES_PER_CHUNK];
122 /* Tags structures in RAM
123 * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
124 * the structure size will get blown out.
127 #ifndef CONFIG_YAFFS_NO_YAFFS1
130 unsigned serialNumber:2;
131 unsigned byteCount:10;
132 unsigned objectId:18;
134 unsigned unusedStuff:2;
145 /* Stuff used for extended tags in YAFFS2 */
148 YAFFS_ECC_RESULT_UNKNOWN,
149 YAFFS_ECC_RESULT_NO_ERROR,
150 YAFFS_ECC_RESULT_FIXED,
151 YAFFS_ECC_RESULT_UNFIXED
155 YAFFS_OBJECT_TYPE_UNKNOWN,
156 YAFFS_OBJECT_TYPE_FILE,
157 YAFFS_OBJECT_TYPE_SYMLINK,
158 YAFFS_OBJECT_TYPE_DIRECTORY,
159 YAFFS_OBJECT_TYPE_HARDLINK,
160 YAFFS_OBJECT_TYPE_SPECIAL
163 #define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
167 unsigned validMarker0;
168 unsigned chunkUsed; /* Status of the chunk: used or unused */
169 unsigned objectId; /* If 0 then this is not part of an object (unused) */
170 unsigned chunkId; /* If 0 then this is a header, else a data chunk */
171 unsigned byteCount; /* Only valid for data chunks */
173 /* The following stuff only has meaning when we read */
174 yaffs_ECCResult eccResult;
178 unsigned chunkDeleted; /* The chunk is marked deleted */
179 unsigned serialNumber; /* Yaffs1 2-bit serial number */
182 unsigned sequenceNumber; /* The sequence number of this block */
184 /* Extra info if this is an object header (YAFFS2 only) */
186 unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */
187 unsigned extraParentObjectId; /* The parent object */
188 unsigned extraIsShrinkHeader; /* Is it a shrink header? */
189 unsigned extraShadows; /* Does this shadow another object? */
191 yaffs_ObjectType extraObjectType; /* What object type? */
193 unsigned extraFileLength; /* Length if it is a file */
194 unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */
196 unsigned validMarker1;
198 } yaffs_ExtendedTags;
200 /* Spare structure for YAFFS1 */
206 __u8 pageStatus; /* set to 0 to delete the chunk */
216 /*Special structure for passing through to mtd */
217 struct yaffs_NANDSpare {
223 /* Block data in RAM */
226 YAFFS_BLOCK_STATE_UNKNOWN = 0,
228 YAFFS_BLOCK_STATE_SCANNING,
229 YAFFS_BLOCK_STATE_NEEDS_SCANNING,
230 /* The block might have something on it (ie it is allocating or full, perhaps empty)
231 * but it needs to be scanned to determine its true state.
232 * This state is only valid during yaffs_Scan.
233 * NB We tolerate empty because the pre-scanner might be incapable of deciding
234 * However, if this state is returned on a YAFFS2 device, then we expect a sequence number
237 YAFFS_BLOCK_STATE_EMPTY,
238 /* This block is empty */
240 YAFFS_BLOCK_STATE_ALLOCATING,
241 /* This block is partially allocated.
242 * At least one page holds valid data.
243 * This is the one currently being used for page
244 * allocation. Should never be more than one of these
247 YAFFS_BLOCK_STATE_FULL,
248 /* All the pages in this block have been allocated.
251 YAFFS_BLOCK_STATE_DIRTY,
252 /* All pages have been allocated and deleted.
253 * Erase me, reuse me.
256 YAFFS_BLOCK_STATE_CHECKPOINT,
257 /* This block is assigned to holding checkpoint data.
260 YAFFS_BLOCK_STATE_COLLECTING,
261 /* This block is being garbage collected */
263 YAFFS_BLOCK_STATE_DEAD
264 /* This block has failed and is not in use */
267 #define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
272 int softDeletions:10; /* number of soft deleted pages */
273 int pagesInUse:10; /* number of pages in use */
274 __u32 blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
275 __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
276 /* and retire the block. */
277 __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
278 __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block.
279 It should be prioritised for GC */
280 __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
282 #ifdef CONFIG_YAFFS_YAFFS2
283 __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
284 __u32 sequenceNumber; /* block sequence number for yaffs2 */
289 /* -------------------------- Object structure -------------------------------*/
290 /* This is the object structure as stored on NAND */
293 yaffs_ObjectType type;
295 /* Apply to everything */
297 __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
298 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
300 /* Thes following apply to directories, files, symlinks - not hard links */
301 __u32 yst_mode; /* protection */
303 #ifdef CONFIG_YAFFS_WINCE
304 __u32 notForWinCE[5];
313 /* File size applies to files only */
316 /* Equivalent object id applies to hard links only. */
317 int equivalentObjectId;
319 /* Alias is for symlinks only. */
320 YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
322 __u32 yst_rdev; /* device stuff for block and char devices (major/min) */
324 #ifdef CONFIG_YAFFS_WINCE
330 __u32 roomToGrow[10];
333 int shadowsObject; /* This object header shadows the specified object if > 0 */
335 /* isShrink applies to object headers written when we shrink the file (ie resize) */
338 } yaffs_ObjectHeader;
340 /*--------------------------- Tnode -------------------------- */
342 union yaffs_Tnode_union {
343 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
344 union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
346 union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
348 /* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
352 typedef union yaffs_Tnode_union yaffs_Tnode;
354 struct yaffs_TnodeList_struct {
355 struct yaffs_TnodeList_struct *next;
359 typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
361 /*------------------------ Object -----------------------------*/
362 /* An object can be one of:
363 * - a directory (no data, has children links
364 * - a regular file (data.... not prunes :->).
365 * - a symlink [symbolic link] (the alias).
371 __u32 scannedFileSize;
375 } yaffs_FileStructure;
378 struct list_head children; /* list of child links */
379 } yaffs_DirectoryStructure;
383 } yaffs_SymLinkStructure;
386 struct yaffs_ObjectStruct *equivalentObject;
387 __u32 equivalentObjectId;
388 } yaffs_HardLinkStructure;
391 yaffs_FileStructure fileVariant;
392 yaffs_DirectoryStructure directoryVariant;
393 yaffs_SymLinkStructure symLinkVariant;
394 yaffs_HardLinkStructure hardLinkVariant;
395 } yaffs_ObjectVariant;
397 struct yaffs_ObjectStruct {
398 __u8 deleted:1; /* This should only apply to unlinked files. */
399 __u8 softDeleted:1; /* it has also been soft deleted */
400 __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/
401 __u8 fake:1; /* A fake object has no presence on NAND. */
402 __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */
403 __u8 unlinkAllowed:1;
404 __u8 dirty:1; /* the object needs to be written to flash */
405 __u8 valid:1; /* When the file system is being loaded up, this
406 * object might be created before the data
407 * is available (ie. file data records appear before the header).
409 __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */
411 __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is
412 * still in the inode cache. Free of object is defered.
413 * until the inode is released.
416 __u8 serial; /* serial number of chunk in NAND. Cached here */
417 __u16 sum; /* sum of the name to speed searching */
419 struct yaffs_DeviceStruct *myDev; /* The device I'm on */
421 struct list_head hashLink; /* list of objects in this hash bucket */
423 struct list_head hardLinks; /* all the equivalent hard linked objects */
425 /* directory structure stuff */
426 /* also used for linking up the free list */
427 struct yaffs_ObjectStruct *parent;
428 struct list_head siblings;
430 /* Where's my object header in NAND? */
433 int nDataChunks; /* Number of data chunks attached to the file. */
435 __u32 objectId; /* the object id value */
439 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
440 YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
447 #ifdef CONFIG_YAFFS_WINCE
462 struct inode *myInode;
466 yaffs_ObjectType variantType;
468 yaffs_ObjectVariant variant;
472 typedef struct yaffs_ObjectStruct yaffs_Object;
474 struct yaffs_ObjectList_struct {
475 yaffs_Object *objects;
476 struct yaffs_ObjectList_struct *next;
479 typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
482 struct list_head list;
484 } yaffs_ObjectBucket;
487 /* yaffs_CheckpointObject holds the definition of an object as dumped
497 yaffs_ObjectType variantType:3;
502 __u8 renameAllowed:1;
503 __u8 unlinkAllowed:1;
507 __u32 fileSizeOrEquivalentObjectId;
509 }yaffs_CheckpointObject;
511 /*--------------------- Temporary buffers ----------------
513 * These are chunk-sized working buffers. Each device has a few
518 int line; /* track from whence this buffer was allocated */
522 /*----------------- Device ---------------------------------*/
524 struct yaffs_DeviceStruct {
525 struct list_head devList;
528 /* Entry parameters set up way early. Yaffs sets up the rest.*/
529 int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
530 int nChunksPerBlock; /* does not need to be a power of 2 */
531 int nBytesPerSpare; /* spare area size */
532 int startBlock; /* Start block we're allowed to use */
533 int endBlock; /* End block we're allowed to use */
534 int nReservedBlocks; /* We want this tuneable so that we can reduce */
535 /* reserved blocks on NOR and RAM. */
538 /* Stuff used by the shared space checkpointing mechanism */
539 /* If this value is zero, then this mechanism is disabled */
541 int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
546 int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
547 * the number of short op caches (don't use too many)
550 int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
552 int useNANDECC; /* Flag to decide whether or not to use NANDECC */
554 void *genericDevice; /* Pointer to device context
555 * On an mtd this holds the mtd pointer.
559 /* NAND access functions (Must be set before calling YAFFS)*/
561 int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
562 int chunkInNAND, const __u8 * data,
563 const yaffs_Spare * spare);
564 int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev,
565 int chunkInNAND, __u8 * data,
566 yaffs_Spare * spare);
567 int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev,
569 int (*initialiseNAND) (struct yaffs_DeviceStruct * dev);
571 #ifdef CONFIG_YAFFS_YAFFS2
572 int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev,
573 int chunkInNAND, const __u8 * data,
574 const yaffs_ExtendedTags * tags);
575 int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev,
576 int chunkInNAND, __u8 * data,
577 yaffs_ExtendedTags * tags);
578 int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo);
579 int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo,
580 yaffs_BlockState * state, int *sequenceNumber);
585 /* The removeObjectCallback function must be supplied by OS flavours that
586 * need it. The Linux kernel does not use this, but yaffs direct does use
587 * it to implement the faster readdir
589 void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
591 /* Callback to mark the superblock dirsty */
592 void (*markSuperBlockDirty)(void * superblock);
594 int wideTnodesDisabled; /* Set to disable wide tnodes */
597 /* End of stuff that must be set before initialisation. */
599 /* Checkpoint control. Can be set before or after initialisation */
600 __u8 skipCheckpointRead;
601 __u8 skipCheckpointWrite;
603 /* Runtime parameters. Set up by YAFFS. */
605 __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
606 __u16 chunkGroupSize; /* == 2^^chunkGroupBits */
608 /* Stuff to support wide tnodes */
612 /* Stuff to support various file offses to chunk/offset translations */
613 /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
616 __u32 crumbsPerChunk;
618 /* Straight shifting for nDataBytesPerChunk being a power of 2 */
625 struct semaphore sem; /* Semaphore for waiting on erasure.*/
626 struct semaphore grossLock; /* Gross locking semaphore */
627 __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
628 * at compile time so we have to allocate it.
630 void (*putSuperFunc) (struct super_block * sb);
638 /* Stuff to support block offsetting to support start block zero */
639 int internalStartBlock;
640 int internalEndBlock;
645 /* Runtime checkpointing stuff */
646 int checkpointPageSequence; /* running sequence number of checkpoint pages */
647 int checkpointByteCount;
648 int checkpointByteOffset;
649 __u8 *checkpointBuffer;
650 int checkpointOpenForWrite;
651 int blocksInCheckpoint;
652 int checkpointCurrentChunk;
653 int checkpointCurrentBlock;
654 int checkpointNextBlock;
655 int *checkpointBlockList;
656 int checkpointMaxBlocks;
661 yaffs_BlockInfo *blockInfo;
662 __u8 *chunkBits; /* bitmap of chunks in use */
663 unsigned blockInfoAlt:1; /* was allocated using alternative strategy */
664 unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */
665 int chunkBitmapStride; /* Number of bytes of chunkBits per block.
666 * Must be consistent with nChunksPerBlock.
670 int allocationBlock; /* Current block being allocated off */
671 __u32 allocationPage;
672 int allocationBlockFinder; /* Used to search for next allocation block */
676 yaffs_Tnode *freeTnodes;
678 yaffs_TnodeList *allocatedTnodeList;
683 yaffs_Object *freeObjects;
686 yaffs_ObjectList *allocatedObjectList;
688 yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
692 int currentDirtyChecker; /* Used to find current dirtiest block */
694 __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
700 int nErasureFailures;
702 int garbageCollections;
703 int passiveGarbageCollections;
711 int nUnmarkedDeletions;
713 int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
715 /* Special directories */
716 yaffs_Object *rootDir;
717 yaffs_Object *lostNFoundDir;
719 /* Buffer areas for storing data to recover from write failures TODO
720 * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
721 * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
724 int bufferedBlock; /* Which block is buffered here? */
725 int doingBufferedBlockRewrite;
727 yaffs_ChunkCache *srCache;
732 /* Stuff for background deletion and unlinked files.*/
733 yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
734 yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
735 yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/
736 int nDeletedFiles; /* Count of files awaiting deletion;*/
737 int nUnlinkedFiles; /* Count of unlinked files. */
738 int nBackgroundDeletions; /* Count of background deletions. */
741 yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
743 int unmanagedTempAllocations;
744 int unmanagedTempDeallocations;
746 /* yaffs2 runtime stuff */
747 unsigned sequenceNumber; /* Sequence number of currently allocating block */
748 unsigned oldestDirtySequence;
752 typedef struct yaffs_DeviceStruct yaffs_Device;
754 /* The static layout of bllock usage etc is stored in the super block header */
758 int checkpointStartBlock;
759 int checkpointEndBlock;
763 } yaffs_SuperBlockHeader;
765 /* The CheckpointDevice structure holds the device information that changes at runtime and
766 * must be preserved over unmount/mount cycles.
771 int allocationBlock; /* Current block being allocated off */
772 __u32 allocationPage;
775 int nDeletedFiles; /* Count of files awaiting deletion;*/
776 int nUnlinkedFiles; /* Count of unlinked files. */
777 int nBackgroundDeletions; /* Count of background deletions. */
779 /* yaffs2 runtime stuff */
780 unsigned sequenceNumber; /* Sequence number of currently allocating block */
781 unsigned oldestDirtySequence;
783 } yaffs_CheckpointDevice;
791 } yaffs_CheckpointValidity;
793 /* Function to manipulate block info */
794 static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
796 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
799 ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
803 return &dev->blockInfo[blk - dev->internalStartBlock];
806 /*----------------------- YAFFS Functions -----------------------*/
808 int yaffs_GutsInitialise(yaffs_Device * dev);
809 void yaffs_Deinitialise(yaffs_Device * dev);
811 int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
813 int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
814 yaffs_Object * newDir, const YCHAR * newName);
816 int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
817 int yaffs_DeleteFile(yaffs_Object * obj);
819 int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize);
820 int yaffs_GetObjectFileLength(yaffs_Object * obj);
821 int yaffs_GetObjectInode(yaffs_Object * obj);
822 unsigned yaffs_GetObjectType(yaffs_Object * obj);
823 int yaffs_GetObjectLinkCount(yaffs_Object * obj);
825 int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr);
826 int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr);
828 /* File operations */
829 int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset,
831 int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
832 int nBytes, int writeThrough);
833 int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize);
835 yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
836 __u32 mode, __u32 uid, __u32 gid);
837 int yaffs_FlushFile(yaffs_Object * obj, int updateTime);
839 /* Flushing and checkpointing */
840 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
842 int yaffs_CheckpointSave(yaffs_Device *dev);
843 int yaffs_CheckpointRestore(yaffs_Device *dev);
845 /* Directory operations */
846 yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
847 __u32 mode, __u32 uid, __u32 gid);
848 yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name);
849 int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
850 int (*fn) (yaffs_Object *));
852 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number);
854 /* Link operations */
855 yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
856 yaffs_Object * equivalentObject);
858 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
860 /* Symlink operations */
861 yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
862 __u32 mode, __u32 uid, __u32 gid,
863 const YCHAR * alias);
864 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj);
866 /* Special inodes (fifos, sockets and devices) */
867 yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
868 __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
870 /* Special directories */
871 yaffs_Object *yaffs_Root(yaffs_Device * dev);
872 yaffs_Object *yaffs_LostNFound(yaffs_Device * dev);
874 #ifdef CONFIG_YAFFS_WINCE
875 /* CONFIG_YAFFS_WINCE special stuff */
876 void yfsd_WinFileTimeNow(__u32 target[2]);
881 void yaffs_HandleDeferedFree(yaffs_Object * obj);
885 int yaffs_DumpObject(yaffs_Object * obj);
887 void yaffs_GutsTest(yaffs_Device * dev);
889 /* A few useful functions */
890 void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
891 void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn);
892 int yaffs_CheckFF(__u8 * buffer, int nBytes);
893 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);