2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
3 * yaffs_guts.h: Configuration etc for yaffs_guts
5 * Copyright (C) 2002 Aleph One Ltd.
6 * for Toby Churchill Ltd and Brightstar Engineering
8 * Created by Charles Manning <charles@aleph1.co.uk>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License version 2.1 as
12 * published by the Free Software Foundation.
15 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
17 * $Id: yaffs_guts.h,v 1.21 2006-05-08 10:13:34 charles Exp $
20 #ifndef __YAFFS_GUTS_H__
21 #define __YAFFS_GUTS_H__
23 #include "devextras.h"
33 * And what have we got...
35 #define YAFFS_MAGIC 0x5941FF53
37 #define YAFFS_NTNODES_LEVEL0 16
38 #define YAFFS_TNODES_LEVEL0_BITS 4
39 #define YAFFS_TNODES_LEVEL0_MASK 0xf
41 #define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
42 #define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
43 #define YAFFS_TNODES_INTERNAL_MASK 0x7
44 #define YAFFS_TNODES_MAX_LEVEL 6
46 #ifndef CONFIG_YAFFS_NO_YAFFS1
47 #define YAFFS_BYTES_PER_SPARE 16
48 #define YAFFS_BYTES_PER_CHUNK 512
49 #define YAFFS_CHUNK_SIZE_SHIFT 9
50 #define YAFFS_CHUNKS_PER_BLOCK 32
51 #define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
54 #define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
55 #define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
57 #define YAFFS_MAX_CHUNK_ID 0x000FFFFF
59 #define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
61 #define YAFFS_ALLOCATION_NOBJECTS 100
62 #define YAFFS_ALLOCATION_NTNODES 100
63 #define YAFFS_ALLOCATION_NLINKS 100
65 #define YAFFS_NOBJECT_BUCKETS 256
68 #define YAFFS_OBJECT_SPACE 0x40000
70 #define YAFFS_NCHECKPOINT_OBJECTS 5000
72 #ifdef CONFIG_YAFFS_UNICODE
73 #define YAFFS_MAX_NAME_LENGTH 127
74 #define YAFFS_MAX_ALIAS_LENGTH 79
76 #define YAFFS_MAX_NAME_LENGTH 255
77 #define YAFFS_MAX_ALIAS_LENGTH 159
80 #define YAFFS_SHORT_NAME_LENGTH 15
82 /* Some special object ids for pseudo objects */
83 #define YAFFS_OBJECTID_ROOT 1
84 #define YAFFS_OBJECTID_LOSTNFOUND 2
85 #define YAFFS_OBJECTID_UNLINKED 3
86 #define YAFFS_OBJECTID_DELETED 4
88 /* Sseudo object ids for checkpointing */
89 #define YAFFS_OBJECTID_SB_HEADER 0x10
90 #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
94 #define YAFFS_MAX_SHORT_OP_CACHES 20
96 #define YAFFS_N_TEMP_BUFFERS 4
98 /* Sequence numbers are used in YAFFS2 to determine block allocation order.
99 * The range is limited slightly to help distinguish bad numbers from good.
100 * This also allows us to perhaps in the future use special numbers for
102 * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
103 * and is a larger number than the lifetime of a 2GB device.
105 #define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
106 #define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
108 /* ChunkCache is used for short read/write operations.*/
110 struct yaffs_ObjectStruct *object;
114 int nBytes; /* Only valid if the cache is dirty */
115 int locked; /* Can't push out or flush while locked. */
116 #ifdef CONFIG_YAFFS_YAFFS2
119 __u8 data[YAFFS_BYTES_PER_CHUNK];
125 /* Tags structures in RAM
126 * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
127 * the structure size will get blown out.
130 #ifndef CONFIG_YAFFS_NO_YAFFS1
133 unsigned serialNumber:2;
134 unsigned byteCount:10;
135 unsigned objectId:18;
137 unsigned unusedStuff:2;
148 /* Stuff used for extended tags in YAFFS2 */
151 YAFFS_ECC_RESULT_UNKNOWN,
152 YAFFS_ECC_RESULT_NO_ERROR,
153 YAFFS_ECC_RESULT_FIXED,
154 YAFFS_ECC_RESULT_UNFIXED
158 YAFFS_OBJECT_TYPE_UNKNOWN,
159 YAFFS_OBJECT_TYPE_FILE,
160 YAFFS_OBJECT_TYPE_SYMLINK,
161 YAFFS_OBJECT_TYPE_DIRECTORY,
162 YAFFS_OBJECT_TYPE_HARDLINK,
163 YAFFS_OBJECT_TYPE_SPECIAL
168 unsigned validMarker0;
169 unsigned chunkUsed; /* Status of the chunk: used or unused */
170 unsigned objectId; /* If 0 then this is not part of an object (unused) */
171 unsigned chunkId; /* If 0 then this is a header, else a data chunk */
172 unsigned byteCount; /* Only valid for data chunks */
174 /* The following stuff only has meaning when we read */
175 yaffs_ECCResult eccResult;
179 unsigned chunkDeleted; /* The chunk is marked deleted */
180 unsigned serialNumber; /* Yaffs1 2-bit serial number */
183 unsigned sequenceNumber; /* The sequence number of this block */
185 /* Extra info if this is an object header (YAFFS2 only) */
187 unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */
188 unsigned extraParentObjectId; /* The parent object */
189 unsigned extraIsShrinkHeader; /* Is it a shrink header? */
190 unsigned extraShadows; /* Does this shadow another object? */
192 yaffs_ObjectType extraObjectType; /* What object type? */
194 unsigned extraFileLength; /* Length if it is a file */
195 unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */
197 unsigned validMarker1;
199 } yaffs_ExtendedTags;
201 /* Spare structure for YAFFS1 */
207 __u8 pageStatus; /* set to 0 to delete the chunk */
217 /*Special structure for passing through to mtd */
218 struct yaffs_NANDSpare {
224 /* Block data in RAM */
227 YAFFS_BLOCK_STATE_UNKNOWN = 0,
229 YAFFS_BLOCK_STATE_SCANNING,
230 YAFFS_BLOCK_STATE_NEEDS_SCANNING,
231 /* The block might have something on it (ie it is allocating or full, perhaps empty)
232 * but it needs to be scanned to determine its true state.
233 * This state is only valid during yaffs_Scan.
234 * NB We tolerate empty because the pre-scanner might be incapable of deciding
235 * However, if this state is returned on a YAFFS2 device, then we expect a sequence number
238 YAFFS_BLOCK_STATE_EMPTY,
239 /* This block is empty */
241 YAFFS_BLOCK_STATE_ALLOCATING,
242 /* This block is partially allocated.
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.
249 * At least one page holds valid data.
252 YAFFS_BLOCK_STATE_DIRTY,
253 /* All pages have been allocated and deleted.
254 * Erase me, reuse me.
257 YAFFS_BLOCK_STATE_COLLECTING,
258 /* This block is being garbage collected */
260 YAFFS_BLOCK_STATE_DEAD
261 /* This block has failed and is not in use */
266 int softDeletions:12; /* number of soft deleted pages */
267 int pagesInUse:12; /* number of pages in use */
268 yaffs_BlockState blockState:4; /* One of the above block states */
269 __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
270 /* and retire the block. */
271 #ifdef CONFIG_YAFFS_YAFFS2
272 __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
273 __u32 sequenceNumber; /* block sequence number for yaffs2 */
278 /* -------------------------- Object structure -------------------------------*/
279 /* This is the object structure as stored on NAND */
282 yaffs_ObjectType type;
284 /* Apply to everything */
286 __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
287 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
289 /* Thes following apply to directories, files, symlinks - not hard links */
290 __u32 yst_mode; /* protection */
292 #ifdef CONFIG_YAFFS_WINCE
293 __u32 notForWinCE[5];
302 /* File size applies to files only */
305 /* Equivalent object id applies to hard links only. */
306 int equivalentObjectId;
308 /* Alias is for symlinks only. */
309 YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
311 __u32 yst_rdev; /* device stuff for block and char devices (major/min) */
313 #ifdef CONFIG_YAFFS_WINCE
319 __u32 roomToGrow[10];
322 int shadowsObject; /* This object header shadows the specified object if > 0 */
324 /* isShrink applies to object headers written when we shrink the file (ie resize) */
327 } yaffs_ObjectHeader;
329 /*--------------------------- Tnode -------------------------- */
331 union yaffs_Tnode_union {
332 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
333 union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
335 union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
337 /* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
341 typedef union yaffs_Tnode_union yaffs_Tnode;
343 struct yaffs_TnodeList_struct {
344 struct yaffs_TnodeList_struct *next;
348 typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
350 /*------------------------ Object -----------------------------*/
351 /* An object can be one of:
352 * - a directory (no data, has children links
353 * - a regular file (data.... not prunes :->).
354 * - a symlink [symbolic link] (the alias).
360 __u32 scannedFileSize;
364 } yaffs_FileStructure;
367 struct list_head children; /* list of child links */
368 } yaffs_DirectoryStructure;
372 } yaffs_SymLinkStructure;
375 struct yaffs_ObjectStruct *equivalentObject;
376 __u32 equivalentObjectId;
377 } yaffs_HardLinkStructure;
380 yaffs_FileStructure fileVariant;
381 yaffs_DirectoryStructure directoryVariant;
382 yaffs_SymLinkStructure symLinkVariant;
383 yaffs_HardLinkStructure hardLinkVariant;
384 } yaffs_ObjectVariant;
386 struct yaffs_ObjectStruct {
387 __u8 deleted:1; /* This should only apply to unlinked files. */
388 __u8 softDeleted:1; /* it has also been soft deleted */
389 __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/
390 __u8 fake:1; /* A fake object has no presence on NAND. */
391 __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */
392 __u8 unlinkAllowed:1;
393 __u8 dirty:1; /* the object needs to be written to flash */
394 __u8 valid:1; /* When the file system is being loaded up, this
395 * object might be created before the data
396 * is available (ie. file data records appear before the header).
398 __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */
400 __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is
401 * still in the inode cache. Free of object is defered.
402 * until the inode is released.
405 __u8 serial; /* serial number of chunk in NAND. Cached here */
406 __u16 sum; /* sum of the name to speed searching */
408 struct yaffs_DeviceStruct *myDev; /* The device I'm on */
410 struct list_head hashLink; /* list of objects in this hash bucket */
412 struct list_head hardLinks; /* all the equivalent hard linked objects */
414 /* directory structure stuff */
415 /* also used for linking up the free list */
416 struct yaffs_ObjectStruct *parent;
417 struct list_head siblings;
419 /* Where's my object header in NAND? */
422 int nDataChunks; /* Number of data chunks attached to the file. */
424 __u32 objectId; /* the object id value */
428 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
429 YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
436 #ifdef CONFIG_YAFFS_WINCE
451 struct inode *myInode;
455 yaffs_ObjectType variantType;
457 yaffs_ObjectVariant variant;
461 typedef struct yaffs_ObjectStruct yaffs_Object;
463 struct yaffs_ObjectList_struct {
464 yaffs_Object *objects;
465 struct yaffs_ObjectList_struct *next;
468 typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
471 struct list_head list;
473 } yaffs_ObjectBucket;
476 /* yaffs_CheckpointObject holds the definition of an object as dumped
486 yaffs_ObjectType variantType:3;
491 __u8 renameAllowed:1;
492 __u8 unlinkAllowed:1;
496 __u32 fileSizeOrEquivalentObjectId;
498 }yaffs_CheckpointObject;
500 /*--------------------- Temporary buffers ----------------
502 * These are chunk-sized working buffers. Each device has a few
507 int line; /* track from whence this buffer was allocated */
511 /*----------------- Device ---------------------------------*/
513 struct yaffs_DeviceStruct {
514 struct list_head devList;
517 /* Entry parameters set up way early. Yaffs sets up the rest.*/
518 int nBytesPerChunk; /* Should be a power of 2 >= 512 */
519 int nChunksPerBlock; /* does not need to be a power of 2 */
520 int nBytesPerSpare; /* spare area size */
521 int startBlock; /* Start block we're allowed to use */
522 int endBlock; /* End block we're allowed to use */
523 int nReservedBlocks; /* We want this tuneable so that we can reduce */
524 /* reserved blocks on NOR and RAM. */
525 /* Stuff used by checkpointing */
527 int checkpointStartBlock;
528 int checkpointEndBlock;
533 int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
534 * the number of short op caches (don't use too many)
537 int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
539 int useNANDECC; /* Flag to decide whether or not to use NANDECC */
541 void *genericDevice; /* Pointer to device context
542 * On an mtd this holds the mtd pointer.
544 /* NAND access functions (Must be set before calling YAFFS)*/
546 int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
547 int chunkInNAND, const __u8 * data,
548 const yaffs_Spare * spare);
549 int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev,
550 int chunkInNAND, __u8 * data,
551 yaffs_Spare * spare);
552 int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev,
554 int (*initialiseNAND) (struct yaffs_DeviceStruct * dev);
556 #ifdef CONFIG_YAFFS_YAFFS2
557 int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev,
558 int chunkInNAND, const __u8 * data,
559 const yaffs_ExtendedTags * tags);
560 int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev,
561 int chunkInNAND, __u8 * data,
562 yaffs_ExtendedTags * tags);
563 int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo);
564 int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo,
565 yaffs_BlockState * state, int *sequenceNumber);
570 /* The removeObjectCallback function must be supplied by OS flavours that
571 * need it. The Linux kernel does not use this, but yaffs direct does use
572 * it to implement the faster readdir
574 void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
576 int wideTnodesDisabled; /* Set to disable wide tnodes */
579 /* End of stuff that must be set before initialisation. */
581 /* Runtime parameters. Set up by YAFFS. */
583 __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
584 __u16 chunkGroupSize; /* == 2^^chunkGroupBits */
586 /* Stuff to support wide tnodes */
593 struct semaphore sem; /* Semaphore for waiting on erasure.*/
594 struct semaphore grossLock; /* Gross locking semaphore */
595 __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
596 * at compile time so we have to allocate it.
598 void (*putSuperFunc) (struct super_block * sb);
605 /* Stuff to support block offsetting to support start block zero */
606 int internalStartBlock;
607 int internalEndBlock;
612 /* Runtime checkpointing stuff */
615 int checkpointByteCount;
616 int checkpointByteOffset;
617 __u8 *checkpointBuffer;
618 int checkpointOpenForWrite;
621 yaffs_BlockInfo *blockInfo;
622 __u8 *chunkBits; /* bitmap of chunks in use */
623 unsigned blockInfoAlt:1; /* was allocated using alternative strategy */
624 unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */
625 int chunkBitmapStride; /* Number of bytes of chunkBits per block.
626 * Must be consistent with nChunksPerBlock.
630 int allocationBlock; /* Current block being allocated off */
631 __u32 allocationPage;
632 int allocationBlockFinder; /* Used to search for next allocation block */
636 yaffs_Tnode *freeTnodes;
638 yaffs_TnodeList *allocatedTnodeList;
643 yaffs_Object *freeObjects;
646 yaffs_ObjectList *allocatedObjectList;
648 yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
652 int currentDirtyChecker; /* Used to find current dirtiest block */
654 __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
660 int nErasureFailures;
662 int garbageCollections;
663 int passiveGarbageCollections;
671 int nUnmarkedDeletions;
673 /* Special directories */
674 yaffs_Object *rootDir;
675 yaffs_Object *lostNFoundDir;
677 /* Buffer areas for storing data to recover from write failures TODO
678 * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
679 * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
682 int bufferedBlock; /* Which block is buffered here? */
683 int doingBufferedBlockRewrite;
685 yaffs_ChunkCache *srCache;
690 /* Stuff for background deletion and unlinked files.*/
691 yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
692 yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
693 yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/
694 int nDeletedFiles; /* Count of files awaiting deletion;*/
695 int nUnlinkedFiles; /* Count of unlinked files. */
696 int nBackgroundDeletions; /* Count of background deletions. */
699 yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
701 int unmanagedTempAllocations;
702 int unmanagedTempDeallocations;
704 /* yaffs2 runtime stuff */
705 unsigned sequenceNumber; /* Sequence number of currently allocating block */
706 unsigned oldestDirtySequence;
710 typedef struct yaffs_DeviceStruct yaffs_Device;
712 /* The static layout of bllock usage etc is stored in the super block header */
716 int checkpointStartBlock;
717 int checkpointEndBlock;
721 } yaffs_SuperBlockHeader;
723 /* The CheckpointDevice structure holds the device information that changes at runtime and
724 * must be preserved over unmount/mount cycles.
729 int allocationBlock; /* Current block being allocated off */
730 __u32 allocationPage;
733 int nDeletedFiles; /* Count of files awaiting deletion;*/
734 int nUnlinkedFiles; /* Count of unlinked files. */
735 int nBackgroundDeletions; /* Count of background deletions. */
737 /* yaffs2 runtime stuff */
738 unsigned sequenceNumber; /* Sequence number of currently allocating block */
739 unsigned oldestDirtySequence;
741 } yaffs_CheckpointDevice;
749 } yaffs_CheckpointValidity;
751 /* Function to manipulate block info */
752 static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
754 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
757 ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
761 return &dev->blockInfo[blk - dev->internalStartBlock];
764 /*----------------------- YAFFS Functions -----------------------*/
766 int yaffs_GutsInitialise(yaffs_Device * dev);
767 void yaffs_Deinitialise(yaffs_Device * dev);
769 int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
771 int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
772 yaffs_Object * newDir, const YCHAR * newName);
774 int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
775 int yaffs_DeleteFile(yaffs_Object * obj);
777 int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize);
778 int yaffs_GetObjectFileLength(yaffs_Object * obj);
779 int yaffs_GetObjectInode(yaffs_Object * obj);
780 unsigned yaffs_GetObjectType(yaffs_Object * obj);
781 int yaffs_GetObjectLinkCount(yaffs_Object * obj);
783 int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr);
784 int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr);
786 /* File operations */
787 int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, __u32 offset,
789 int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, __u32 offset,
790 int nBytes, int writeThrough);
791 int yaffs_ResizeFile(yaffs_Object * obj, int newSize);
793 yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
794 __u32 mode, __u32 uid, __u32 gid);
795 int yaffs_FlushFile(yaffs_Object * obj, int updateTime);
797 /* Flushing and checkpointing */
798 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
800 int yaffs_CheckpointSave(yaffs_Device *dev);
801 int yaffs_CheckpointRestore(yaffs_Device *dev);
803 /* Directory operations */
804 yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
805 __u32 mode, __u32 uid, __u32 gid);
806 yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name);
807 int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
808 int (*fn) (yaffs_Object *));
810 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number);
812 /* Link operations */
813 yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
814 yaffs_Object * equivalentObject);
816 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
818 /* Symlink operations */
819 yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
820 __u32 mode, __u32 uid, __u32 gid,
821 const YCHAR * alias);
822 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj);
824 /* Special inodes (fifos, sockets and devices) */
825 yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
826 __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
828 /* Special directories */
829 yaffs_Object *yaffs_Root(yaffs_Device * dev);
830 yaffs_Object *yaffs_LostNFound(yaffs_Device * dev);
832 #ifdef CONFIG_YAFFS_WINCE
833 /* CONFIG_YAFFS_WINCE special stuff */
834 void yfsd_WinFileTimeNow(__u32 target[2]);
839 void yaffs_HandleDeferedFree(yaffs_Object * obj);
843 int yaffs_DumpObject(yaffs_Object * obj);
845 void yaffs_GutsTest(yaffs_Device * dev);
847 /* A few useful functions */
848 void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
849 void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn);
850 int yaffs_CheckFF(__u8 * buffer, int nBytes);