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 General Public License version 2 as
11 * published by the Free Software Foundation.
14 const char *yaffs_guts_c_version
=
18 #include "yaffsinterface.h"
19 #include "yaffs_guts.h"
20 #include "yaffs_tagsvalidity.h"
22 #include "yaffs_tagscompat.h"
23 #ifndef CONFIG_YAFFS_USE_OWN_SORT
24 #include "yaffs_qsort.h"
26 #include "yaffs_nand.h"
28 #include "yaffs_checkptrw.h"
30 #include "yaffs_nand.h"
31 #include "yaffs_packedtags2.h"
34 #ifdef CONFIG_YAFFS_WINCE
35 void yfsd_LockYAFFS(BOOL fsLockOnly
);
36 void yfsd_UnlockYAFFS(BOOL fsLockOnly
);
39 #define YAFFS_PASSIVE_GC_CHUNKS 2
41 #include "yaffs_ecc.h"
44 /* Robustification (if it ever comes about...) */
45 static void yaffs_RetireBlock(yaffs_Device
* dev
, int blockInNAND
);
46 static void yaffs_HandleWriteChunkError(yaffs_Device
* dev
, int chunkInNAND
, int erasedOk
);
47 static void yaffs_HandleWriteChunkOk(yaffs_Device
* dev
, int chunkInNAND
,
49 const yaffs_ExtendedTags
* tags
);
50 static void yaffs_HandleUpdateChunk(yaffs_Device
* dev
, int chunkInNAND
,
51 const yaffs_ExtendedTags
* tags
);
53 /* Other local prototypes */
54 static int yaffs_UnlinkObject( yaffs_Object
*obj
);
55 static int yaffs_ObjectHasCachedWriteData(yaffs_Object
*obj
);
57 static void yaffs_HardlinkFixup(yaffs_Device
*dev
, yaffs_Object
*hardList
);
59 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device
* dev
,
61 yaffs_ExtendedTags
* tags
,
63 static int yaffs_PutChunkIntoFile(yaffs_Object
* in
, int chunkInInode
,
64 int chunkInNAND
, int inScan
);
66 static yaffs_Object
*yaffs_CreateNewObject(yaffs_Device
* dev
, int number
,
67 yaffs_ObjectType type
);
68 static void yaffs_AddObjectToDirectory(yaffs_Object
* directory
,
70 static int yaffs_UpdateObjectHeader(yaffs_Object
* in
, const YCHAR
* name
,
71 int force
, int isShrink
, int shadows
);
72 static void yaffs_RemoveObjectFromDirectory(yaffs_Object
* obj
);
73 static int yaffs_CheckStructures(void);
74 static int yaffs_DeleteWorker(yaffs_Object
* in
, yaffs_Tnode
* tn
, __u32 level
,
75 int chunkOffset
, int *limit
);
76 static int yaffs_DoGenericObjectDeletion(yaffs_Object
* in
);
78 static yaffs_BlockInfo
*yaffs_GetBlockInfo(yaffs_Device
* dev
, int blockNo
);
80 static __u8
*yaffs_GetTempBuffer(yaffs_Device
* dev
, int lineNo
);
81 static void yaffs_ReleaseTempBuffer(yaffs_Device
* dev
, __u8
* buffer
,
84 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct
*dev
,
87 static int yaffs_UnlinkWorker(yaffs_Object
* obj
);
88 static void yaffs_DestroyObject(yaffs_Object
* obj
);
90 static int yaffs_TagsMatch(const yaffs_ExtendedTags
* tags
, int objectId
,
93 loff_t
yaffs_GetFileSize(yaffs_Object
* obj
);
95 static int yaffs_AllocateChunk(yaffs_Device
* dev
, int useReserve
, yaffs_BlockInfo
**blockUsedPtr
);
97 static void yaffs_VerifyFreeChunks(yaffs_Device
* dev
);
99 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object
*in
);
101 #ifdef YAFFS_PARANOID
102 static int yaffs_CheckFileSanity(yaffs_Object
* in
);
104 #define yaffs_CheckFileSanity(in)
107 static void yaffs_InvalidateWholeChunkCache(yaffs_Object
* in
);
108 static void yaffs_InvalidateChunkCache(yaffs_Object
* object
, int chunkId
);
110 static void yaffs_InvalidateCheckpoint(yaffs_Device
*dev
);
112 static int yaffs_FindChunkInFile(yaffs_Object
* in
, int chunkInInode
,
113 yaffs_ExtendedTags
* tags
);
115 static __u32
yaffs_GetChunkGroupBase(yaffs_Device
*dev
, yaffs_Tnode
*tn
, unsigned pos
);
116 static yaffs_Tnode
*yaffs_FindLevel0Tnode(yaffs_Device
* dev
,
117 yaffs_FileStructure
* fStruct
,
121 /* Function to calculate chunk and offset */
123 static void yaffs_AddrToChunk(yaffs_Device
*dev
, loff_t addr
, __u32
*chunk
, __u32
*offset
)
126 /* Easy-peasy power of 2 case */
127 *chunk
= (__u32
)(addr
>> dev
->chunkShift
);
128 *offset
= (__u32
)(addr
& dev
->chunkMask
);
130 else if(dev
->crumbsPerChunk
)
132 /* Case where we're using "crumbs" */
133 *offset
= (__u32
)(addr
& dev
->crumbMask
);
134 addr
>>= dev
->crumbShift
;
135 *chunk
= ((__u32
)addr
)/dev
->crumbsPerChunk
;
136 *offset
+= ((addr
- (*chunk
* dev
->crumbsPerChunk
)) << dev
->crumbShift
);
142 /* Function to return the number of shifts for a power of 2 greater than or equal
143 * to the given number
144 * Note we don't try to cater for all possible numbers and this does not have to
145 * be hellishly efficient.
148 static __u32
ShiftsGE(__u32 x
)
153 nShifts
= extraBits
= 0;
156 if(x
& 1) extraBits
++;
167 /* Function to return the number of shifts to get a 1 in bit 0
170 static __u32
ShiftDiv(__u32 x
)
189 * Temporary buffer manipulations.
192 static int yaffs_InitialiseTempBuffers(yaffs_Device
*dev
)
195 __u8
*buf
= (__u8
*)1;
197 memset(dev
->tempBuffer
,0,sizeof(dev
->tempBuffer
));
199 for (i
= 0; buf
&& i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
200 dev
->tempBuffer
[i
].line
= 0; /* not in use */
201 dev
->tempBuffer
[i
].buffer
= buf
=
202 YMALLOC_DMA(dev
->nDataBytesPerChunk
);
205 return buf
? YAFFS_OK
: YAFFS_FAIL
;
209 static __u8
*yaffs_GetTempBuffer(yaffs_Device
* dev
, int lineNo
)
212 for (i
= 0; i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
213 if (dev
->tempBuffer
[i
].line
== 0) {
214 dev
->tempBuffer
[i
].line
= lineNo
;
215 if ((i
+ 1) > dev
->maxTemp
) {
216 dev
->maxTemp
= i
+ 1;
217 for (j
= 0; j
<= i
; j
++)
218 dev
->tempBuffer
[j
].maxLine
=
219 dev
->tempBuffer
[j
].line
;
222 return dev
->tempBuffer
[i
].buffer
;
226 T(YAFFS_TRACE_BUFFERS
,
227 (TSTR("Out of temp buffers at line %d, other held by lines:"),
229 for (i
= 0; i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
230 T(YAFFS_TRACE_BUFFERS
, (TSTR(" %d "), dev
->tempBuffer
[i
].line
));
232 T(YAFFS_TRACE_BUFFERS
, (TSTR(" " TENDSTR
)));
235 * If we got here then we have to allocate an unmanaged one
239 dev
->unmanagedTempAllocations
++;
240 return YMALLOC(dev
->nDataBytesPerChunk
);
244 static void yaffs_ReleaseTempBuffer(yaffs_Device
* dev
, __u8
* buffer
,
248 for (i
= 0; i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
249 if (dev
->tempBuffer
[i
].buffer
== buffer
) {
250 dev
->tempBuffer
[i
].line
= 0;
256 /* assume it is an unmanaged one. */
257 T(YAFFS_TRACE_BUFFERS
,
258 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR
),
261 dev
->unmanagedTempDeallocations
++;
267 * Determine if we have a managed buffer.
269 int yaffs_IsManagedTempBuffer(yaffs_Device
* dev
, const __u8
* buffer
)
272 for (i
= 0; i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
273 if (dev
->tempBuffer
[i
].buffer
== buffer
)
278 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
279 if( dev
->srCache
[i
].data
== buffer
)
284 if (buffer
== dev
->checkpointBuffer
)
287 T(YAFFS_TRACE_ALWAYS
,
288 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR
)));
295 * Chunk bitmap manipulations
298 static Y_INLINE __u8
*yaffs_BlockBits(yaffs_Device
* dev
, int blk
)
300 if (blk
< dev
->internalStartBlock
|| blk
> dev
->internalEndBlock
) {
302 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR
),
306 return dev
->chunkBits
+
307 (dev
->chunkBitmapStride
* (blk
- dev
->internalStartBlock
));
310 static Y_INLINE
void yaffs_VerifyChunkBitId(yaffs_Device
*dev
, int blk
, int chunk
)
312 if(blk
< dev
->internalStartBlock
|| blk
> dev
->internalEndBlock
||
313 chunk
< 0 || chunk
>= dev
->nChunksPerBlock
) {
315 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR
),blk
,chunk
));
320 static Y_INLINE
void yaffs_ClearChunkBits(yaffs_Device
* dev
, int blk
)
322 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
324 memset(blkBits
, 0, dev
->chunkBitmapStride
);
327 static Y_INLINE
void yaffs_ClearChunkBit(yaffs_Device
* dev
, int blk
, int chunk
)
329 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
331 yaffs_VerifyChunkBitId(dev
,blk
,chunk
);
333 blkBits
[chunk
/ 8] &= ~(1 << (chunk
& 7));
336 static Y_INLINE
void yaffs_SetChunkBit(yaffs_Device
* dev
, int blk
, int chunk
)
338 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
340 yaffs_VerifyChunkBitId(dev
,blk
,chunk
);
342 blkBits
[chunk
/ 8] |= (1 << (chunk
& 7));
345 static Y_INLINE
int yaffs_CheckChunkBit(yaffs_Device
* dev
, int blk
, int chunk
)
347 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
348 yaffs_VerifyChunkBitId(dev
,blk
,chunk
);
350 return (blkBits
[chunk
/ 8] & (1 << (chunk
& 7))) ? 1 : 0;
353 static Y_INLINE
int yaffs_StillSomeChunkBits(yaffs_Device
* dev
, int blk
)
355 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
357 for (i
= 0; i
< dev
->chunkBitmapStride
; i
++) {
365 static int yaffs_CountChunkBits(yaffs_Device
* dev
, int blk
)
367 __u8
*blkBits
= yaffs_BlockBits(dev
, blk
);
370 for (i
= 0; i
< dev
->chunkBitmapStride
; i
++) {
387 static int yaffs_SkipVerification(yaffs_Device
*dev
)
389 return !(yaffs_traceMask
& (YAFFS_TRACE_VERIFY
| YAFFS_TRACE_VERIFY_FULL
));
392 static int yaffs_SkipFullVerification(yaffs_Device
*dev
)
394 return !(yaffs_traceMask
& (YAFFS_TRACE_VERIFY_FULL
));
397 static int yaffs_SkipNANDVerification(yaffs_Device
*dev
)
399 return !(yaffs_traceMask
& (YAFFS_TRACE_VERIFY_NAND
));
402 static const char * blockStateName
[] = {
415 static void yaffs_VerifyBlock(yaffs_Device
*dev
,yaffs_BlockInfo
*bi
,int n
)
420 if(yaffs_SkipVerification(dev
))
423 /* Report illegal runtime states */
424 if(bi
->blockState
<0 || bi
->blockState
>= YAFFS_NUMBER_OF_BLOCK_STATES
)
425 T(YAFFS_TRACE_VERIFY
,(TSTR("Block %d has undefined state %d"TENDSTR
),n
,bi
->blockState
));
427 switch(bi
->blockState
){
428 case YAFFS_BLOCK_STATE_UNKNOWN
:
429 case YAFFS_BLOCK_STATE_SCANNING
:
430 case YAFFS_BLOCK_STATE_NEEDS_SCANNING
:
431 T(YAFFS_TRACE_VERIFY
,(TSTR("Block %d has bad run-state %s"TENDSTR
),
432 n
,blockStateName
[bi
->blockState
]));
435 /* Check pages in use and soft deletions are legal */
437 actuallyUsed
= bi
->pagesInUse
- bi
->softDeletions
;
439 if(bi
->pagesInUse
< 0 || bi
->pagesInUse
> dev
->nChunksPerBlock
||
440 bi
->softDeletions
< 0 || bi
->softDeletions
> dev
->nChunksPerBlock
||
441 actuallyUsed
< 0 || actuallyUsed
> dev
->nChunksPerBlock
)
442 T(YAFFS_TRACE_VERIFY
,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR
),
443 n
,bi
->pagesInUse
,bi
->softDeletions
));
446 /* Check chunk bitmap legal */
447 inUse
= yaffs_CountChunkBits(dev
,n
);
448 if(inUse
!= bi
->pagesInUse
)
449 T(YAFFS_TRACE_VERIFY
,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR
),
450 n
,bi
->pagesInUse
,inUse
));
452 /* Check that the sequence number is valid.
453 * Ten million is legal, but is very unlikely
456 (bi
->blockState
== YAFFS_BLOCK_STATE_ALLOCATING
|| bi
->blockState
== YAFFS_BLOCK_STATE_FULL
) &&
457 (bi
->sequenceNumber
< YAFFS_LOWEST_SEQUENCE_NUMBER
|| bi
->sequenceNumber
> 10000000 ))
458 T(YAFFS_TRACE_VERIFY
,(TSTR("Block %d has suspect sequence number of %d"TENDSTR
),
459 n
,bi
->sequenceNumber
));
463 static void yaffs_VerifyCollectedBlock(yaffs_Device
*dev
,yaffs_BlockInfo
*bi
,int n
)
465 yaffs_VerifyBlock(dev
,bi
,n
);
467 /* After collection the block should be in the erased state */
468 /* TODO: This will need to change if we do partial gc */
470 if(bi
->blockState
!= YAFFS_BLOCK_STATE_EMPTY
){
471 T(YAFFS_TRACE_ERROR
,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR
),
476 static void yaffs_VerifyBlocks(yaffs_Device
*dev
)
479 int nBlocksPerState
[YAFFS_NUMBER_OF_BLOCK_STATES
];
480 int nIllegalBlockStates
= 0;
483 if(yaffs_SkipVerification(dev
))
486 memset(nBlocksPerState
,0,sizeof(nBlocksPerState
));
489 for(i
= dev
->internalStartBlock
; i
<= dev
->internalEndBlock
; i
++){
490 yaffs_BlockInfo
*bi
= yaffs_GetBlockInfo(dev
,i
);
491 yaffs_VerifyBlock(dev
,bi
,i
);
493 if(bi
->blockState
>=0 && bi
->blockState
< YAFFS_NUMBER_OF_BLOCK_STATES
)
494 nBlocksPerState
[bi
->blockState
]++;
496 nIllegalBlockStates
++;
500 T(YAFFS_TRACE_VERIFY
,(TSTR(""TENDSTR
)));
501 T(YAFFS_TRACE_VERIFY
,(TSTR("Block summary"TENDSTR
)));
503 T(YAFFS_TRACE_VERIFY
,(TSTR("%d blocks have illegal states"TENDSTR
),nIllegalBlockStates
));
504 if(nBlocksPerState
[YAFFS_BLOCK_STATE_ALLOCATING
] > 1)
505 T(YAFFS_TRACE_VERIFY
,(TSTR("Too many allocating blocks"TENDSTR
)));
507 for(i
= 0; i
< YAFFS_NUMBER_OF_BLOCK_STATES
; i
++)
508 T(YAFFS_TRACE_VERIFY
,
509 (TSTR("%s %d blocks"TENDSTR
),
510 blockStateName
[i
],nBlocksPerState
[i
]));
512 if(dev
->blocksInCheckpoint
!= nBlocksPerState
[YAFFS_BLOCK_STATE_CHECKPOINT
])
513 T(YAFFS_TRACE_VERIFY
,
514 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR
),
515 dev
->blocksInCheckpoint
, nBlocksPerState
[YAFFS_BLOCK_STATE_CHECKPOINT
]));
517 if(dev
->nErasedBlocks
!= nBlocksPerState
[YAFFS_BLOCK_STATE_EMPTY
])
518 T(YAFFS_TRACE_VERIFY
,
519 (TSTR("Erased block count wrong dev %d count %d"TENDSTR
),
520 dev
->nErasedBlocks
, nBlocksPerState
[YAFFS_BLOCK_STATE_EMPTY
]));
522 if(nBlocksPerState
[YAFFS_BLOCK_STATE_COLLECTING
] > 1)
523 T(YAFFS_TRACE_VERIFY
,
524 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR
),
525 nBlocksPerState
[YAFFS_BLOCK_STATE_COLLECTING
]));
527 T(YAFFS_TRACE_VERIFY
,(TSTR(""TENDSTR
)));
532 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
533 * case those tests will not be performed.
535 static void yaffs_VerifyObjectHeader(yaffs_Object
*obj
, yaffs_ObjectHeader
*oh
, yaffs_ExtendedTags
*tags
, int parentCheck
)
537 if(yaffs_SkipVerification(obj
->myDev
))
540 if(!(tags
&& obj
&& oh
)){
541 T(YAFFS_TRACE_VERIFY
,
542 (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR
),
543 (__u32
)tags
,(__u32
)obj
,(__u32
)oh
));
547 if(oh
->type
<= YAFFS_OBJECT_TYPE_UNKNOWN
||
548 oh
->type
> YAFFS_OBJECT_TYPE_MAX
)
549 T(YAFFS_TRACE_VERIFY
,
550 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR
),
551 tags
->objectId
, oh
->type
));
553 if(tags
->objectId
!= obj
->objectId
)
554 T(YAFFS_TRACE_VERIFY
,
555 (TSTR("Obj %d header mismatch objectId %d"TENDSTR
),
556 tags
->objectId
, obj
->objectId
));
560 * Check that the object's parent ids match if parentCheck requested.
562 * Tests do not apply to the root object.
565 if(parentCheck
&& tags
->objectId
> 1 && !obj
->parent
)
566 T(YAFFS_TRACE_VERIFY
,
567 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR
),
568 tags
->objectId
, oh
->parentObjectId
));
571 if(parentCheck
&& obj
->parent
&&
572 oh
->parentObjectId
!= obj
->parent
->objectId
&&
573 (oh
->parentObjectId
!= YAFFS_OBJECTID_UNLINKED
||
574 obj
->parent
->objectId
!= YAFFS_OBJECTID_DELETED
))
575 T(YAFFS_TRACE_VERIFY
,
576 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR
),
577 tags
->objectId
, oh
->parentObjectId
, obj
->parent
->objectId
));
580 if(tags
->objectId
> 1 && oh
->name
[0] == 0) /* Null name */
581 T(YAFFS_TRACE_VERIFY
,
582 (TSTR("Obj %d header name is NULL"TENDSTR
),
585 if(tags
->objectId
> 1 && ((__u8
)(oh
->name
[0])) == 0xff) /* Trashed name */
586 T(YAFFS_TRACE_VERIFY
,
587 (TSTR("Obj %d header name is 0xFF"TENDSTR
),
593 static int yaffs_VerifyTnodeWorker(yaffs_Object
* obj
, yaffs_Tnode
* tn
,
594 __u32 level
, int chunkOffset
)
597 yaffs_Device
*dev
= obj
->myDev
;
599 int nTnodeBytes
= (dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8;
604 for (i
= 0; i
< YAFFS_NTNODES_INTERNAL
&& ok
; i
++){
605 if (tn
->internal
[i
]) {
606 ok
= yaffs_VerifyTnodeWorker(obj
,
609 (chunkOffset
<<YAFFS_TNODES_INTERNAL_BITS
) + i
);
612 } else if (level
== 0) {
614 yaffs_ExtendedTags tags
;
615 __u32 objectId
= obj
->objectId
;
617 chunkOffset
<<= YAFFS_TNODES_LEVEL0_BITS
;
619 for(i
= 0; i
< YAFFS_NTNODES_LEVEL0
; i
++){
620 __u32 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,i
);
623 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
624 yaffs_ReadChunkWithTagsFromNAND(dev
,theChunk
,NULL
, &tags
);
625 if(tags
.objectId
!= objectId
|| tags
.chunkId
!= chunkOffset
){
626 T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR
),
627 objectId
, chunkOffset
, theChunk
,
628 tags
.objectId
, tags
.chunkId
));
641 static void yaffs_VerifyFile(yaffs_Object
*obj
)
643 int requiredTallness
;
650 yaffs_ExtendedTags tags
;
654 if(obj
&& yaffs_SkipVerification(obj
->myDev
))
658 objectId
= obj
->objectId
;
660 /* Check file size is consistent with tnode depth */
661 lastChunk
= obj
->variant
.fileVariant
.fileSize
/ dev
->nDataBytesPerChunk
+ 1;
662 x
= lastChunk
>> YAFFS_TNODES_LEVEL0_BITS
;
663 requiredTallness
= 0;
665 x
>>= YAFFS_TNODES_INTERNAL_BITS
;
669 actualTallness
= obj
->variant
.fileVariant
.topLevel
;
671 if(requiredTallness
> actualTallness
)
672 T(YAFFS_TRACE_VERIFY
,
673 (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR
),
674 obj
->objectId
,actualTallness
, requiredTallness
));
677 /* Check that the chunks in the tnode tree are all correct.
678 * We do this by scanning through the tnode tree and
679 * checking the tags for every chunk match.
682 if(yaffs_SkipNANDVerification(dev
))
685 for(i
= 1; i
<= lastChunk
; i
++){
686 tn
= yaffs_FindLevel0Tnode(dev
, &obj
->variant
.fileVariant
,i
);
689 __u32 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,i
);
691 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
692 yaffs_ReadChunkWithTagsFromNAND(dev
,theChunk
,NULL
, &tags
);
693 if(tags
.objectId
!= objectId
|| tags
.chunkId
!= i
){
694 T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR
),
695 objectId
, i
, theChunk
,
696 tags
.objectId
, tags
.chunkId
));
705 static void yaffs_VerifyDirectory(yaffs_Object
*obj
)
707 if(obj
&& yaffs_SkipVerification(obj
->myDev
))
712 static void yaffs_VerifyHardLink(yaffs_Object
*obj
)
714 if(obj
&& yaffs_SkipVerification(obj
->myDev
))
717 /* Verify sane equivalent object */
720 static void yaffs_VerifySymlink(yaffs_Object
*obj
)
722 if(obj
&& yaffs_SkipVerification(obj
->myDev
))
725 /* Verify symlink string */
728 static void yaffs_VerifySpecial(yaffs_Object
*obj
)
730 if(obj
&& yaffs_SkipVerification(obj
->myDev
))
734 static void yaffs_VerifyObject(yaffs_Object
*obj
)
749 if(yaffs_SkipVerification(dev
))
752 /* Check sane object header chunk */
754 chunkMin
= dev
->internalStartBlock
* dev
->nChunksPerBlock
;
755 chunkMax
= (dev
->internalEndBlock
+1) * dev
->nChunksPerBlock
- 1;
757 chunkIdOk
= (obj
->chunkId
>= chunkMin
&& obj
->chunkId
<= chunkMax
);
758 chunkIsLive
= chunkIdOk
&&
759 yaffs_CheckChunkBit(dev
,
760 obj
->chunkId
/ dev
->nChunksPerBlock
,
761 obj
->chunkId
% dev
->nChunksPerBlock
);
763 (!chunkIdOk
|| !chunkIsLive
)) {
764 T(YAFFS_TRACE_VERIFY
,
765 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR
),
766 obj
->objectId
,obj
->chunkId
,
767 chunkIdOk
? "" : ",out of range",
768 chunkIsLive
|| !chunkIdOk
? "" : ",marked as deleted"));
771 if(chunkIdOk
&& chunkIsLive
&&!yaffs_SkipNANDVerification(dev
)) {
772 yaffs_ExtendedTags tags
;
773 yaffs_ObjectHeader
*oh
;
774 __u8
*buffer
= yaffs_GetTempBuffer(dev
,__LINE__
);
776 oh
= (yaffs_ObjectHeader
*)buffer
;
778 yaffs_ReadChunkWithTagsFromNAND(dev
, obj
->chunkId
,buffer
, &tags
);
780 yaffs_VerifyObjectHeader(obj
,oh
,&tags
,1);
782 yaffs_ReleaseTempBuffer(dev
,buffer
,__LINE__
);
785 /* Verify it has a parent */
786 if(obj
&& !obj
->fake
&&
787 (!obj
->parent
|| obj
->parent
->myDev
!= dev
)){
788 T(YAFFS_TRACE_VERIFY
,
789 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR
),
790 obj
->objectId
,obj
->parent
));
793 /* Verify parent is a directory */
794 if(obj
->parent
&& obj
->parent
->variantType
!= YAFFS_OBJECT_TYPE_DIRECTORY
){
795 T(YAFFS_TRACE_VERIFY
,
796 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR
),
797 obj
->objectId
,obj
->parent
->variantType
));
800 switch(obj
->variantType
){
801 case YAFFS_OBJECT_TYPE_FILE
:
802 yaffs_VerifyFile(obj
);
804 case YAFFS_OBJECT_TYPE_SYMLINK
:
805 yaffs_VerifySymlink(obj
);
807 case YAFFS_OBJECT_TYPE_DIRECTORY
:
808 yaffs_VerifyDirectory(obj
);
810 case YAFFS_OBJECT_TYPE_HARDLINK
:
811 yaffs_VerifyHardLink(obj
);
813 case YAFFS_OBJECT_TYPE_SPECIAL
:
814 yaffs_VerifySpecial(obj
);
816 case YAFFS_OBJECT_TYPE_UNKNOWN
:
818 T(YAFFS_TRACE_VERIFY
,
819 (TSTR("Obj %d has illegaltype %d"TENDSTR
),
820 obj
->objectId
,obj
->variantType
));
827 static void yaffs_VerifyObjects(yaffs_Device
*dev
)
831 struct list_head
*lh
;
833 if(yaffs_SkipVerification(dev
))
836 /* Iterate through the objects in each hash entry */
838 for(i
= 0; i
< YAFFS_NOBJECT_BUCKETS
; i
++){
839 list_for_each(lh
, &dev
->objectBucket
[i
].list
) {
841 obj
= list_entry(lh
, yaffs_Object
, hashLink
);
842 yaffs_VerifyObject(obj
);
851 * Simple hash function. Needs to have a reasonable spread
854 static Y_INLINE
int yaffs_HashFunction(int n
)
857 return (n
% YAFFS_NOBJECT_BUCKETS
);
861 * Access functions to useful fake objects
864 yaffs_Object
*yaffs_Root(yaffs_Device
* dev
)
869 yaffs_Object
*yaffs_LostNFound(yaffs_Device
* dev
)
871 return dev
->lostNFoundDir
;
876 * Erased NAND checking functions
879 int yaffs_CheckFF(__u8
* buffer
, int nBytes
)
881 /* Horrible, slow implementation */
890 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct
*dev
,
894 int retval
= YAFFS_OK
;
895 __u8
*data
= yaffs_GetTempBuffer(dev
, __LINE__
);
896 yaffs_ExtendedTags tags
;
899 result
= yaffs_ReadChunkWithTagsFromNAND(dev
, chunkInNAND
, data
, &tags
);
901 if(tags
.eccResult
> YAFFS_ECC_RESULT_NO_ERROR
)
905 if (!yaffs_CheckFF(data
, dev
->nDataBytesPerChunk
) || tags
.chunkUsed
) {
906 T(YAFFS_TRACE_NANDACCESS
,
907 (TSTR("Chunk %d not erased" TENDSTR
), chunkInNAND
));
911 yaffs_ReleaseTempBuffer(dev
, data
, __LINE__
);
918 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct
*dev
,
920 yaffs_ExtendedTags
* tags
,
927 yaffs_InvalidateCheckpoint(dev
);
930 yaffs_BlockInfo
*bi
= 0;
933 chunk
= yaffs_AllocateChunk(dev
, useReserve
, &bi
);
939 /* First check this chunk is erased, if it needs
940 * checking. The checking policy (unless forced
941 * always on) is as follows:
943 * Check the first page we try to write in a block.
944 * If the check passes then we don't need to check any
945 * more. If the check fails, we check again...
946 * If the block has been erased, we don't need to check.
948 * However, if the block has been prioritised for gc,
949 * then we think there might be something odd about
950 * this block and stop using it.
952 * Rationale: We should only ever see chunks that have
953 * not been erased if there was a partially written
954 * chunk due to power loss. This checking policy should
955 * catch that case with very few checks and thus save a
956 * lot of checks that are most likely not needed.
958 if (bi
->gcPrioritise
) {
959 yaffs_DeleteChunk(dev
, chunk
, 1, __LINE__
);
960 /* try another chunk */
964 /* let's give it a try */
967 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
968 bi
->skipErasedCheck
= 0;
970 if (!bi
->skipErasedCheck
) {
971 erasedOk
= yaffs_CheckChunkErased(dev
, chunk
);
972 if (erasedOk
!= YAFFS_OK
) {
974 (TSTR ("**>> yaffs chunk %d was not erased"
977 /* try another chunk */
980 bi
->skipErasedCheck
= 1;
983 writeOk
= yaffs_WriteChunkWithTagsToNAND(dev
, chunk
,
985 if (writeOk
!= YAFFS_OK
) {
986 yaffs_HandleWriteChunkError(dev
, chunk
, erasedOk
);
987 /* try another chunk */
991 /* Copy the data into the robustification buffer */
992 yaffs_HandleWriteChunkOk(dev
, chunk
, data
, tags
);
994 } while (writeOk
!= YAFFS_OK
&& attempts
< yaffs_wr_attempts
);
998 (TSTR("**>> yaffs write required %d attempts" TENDSTR
),
1001 dev
->nRetriedWrites
+= (attempts
- 1);
1008 * Block retiring for handling a broken block.
1011 static void yaffs_RetireBlock(yaffs_Device
* dev
, int blockInNAND
)
1013 yaffs_BlockInfo
*bi
= yaffs_GetBlockInfo(dev
, blockInNAND
);
1015 yaffs_InvalidateCheckpoint(dev
);
1017 yaffs_MarkBlockBad(dev
, blockInNAND
);
1019 bi
->blockState
= YAFFS_BLOCK_STATE_DEAD
;
1020 bi
->gcPrioritise
= 0;
1021 bi
->needsRetiring
= 0;
1023 dev
->nRetiredBlocks
++;
1027 * Functions for robustisizing TODO
1031 static void yaffs_HandleWriteChunkOk(yaffs_Device
* dev
, int chunkInNAND
,
1033 const yaffs_ExtendedTags
* tags
)
1037 static void yaffs_HandleUpdateChunk(yaffs_Device
* dev
, int chunkInNAND
,
1038 const yaffs_ExtendedTags
* tags
)
1042 void yaffs_HandleChunkError(yaffs_Device
*dev
, yaffs_BlockInfo
*bi
)
1044 if(!bi
->gcPrioritise
){
1045 bi
->gcPrioritise
= 1;
1046 dev
->hasPendingPrioritisedGCs
= 1;
1047 bi
->chunkErrorStrikes
++;
1049 if(bi
->chunkErrorStrikes
> 3){
1050 bi
->needsRetiring
= 1; /* Too many stikes, so retire this */
1051 T(YAFFS_TRACE_ALWAYS
, (TSTR("yaffs: Block struck out" TENDSTR
)));
1058 static void yaffs_HandleWriteChunkError(yaffs_Device
* dev
, int chunkInNAND
, int erasedOk
)
1061 int blockInNAND
= chunkInNAND
/ dev
->nChunksPerBlock
;
1062 yaffs_BlockInfo
*bi
= yaffs_GetBlockInfo(dev
, blockInNAND
);
1064 yaffs_HandleChunkError(dev
,bi
);
1068 /* Was an actual write failure, so mark the block for retirement */
1069 bi
->needsRetiring
= 1;
1070 T(YAFFS_TRACE_ERROR
| YAFFS_TRACE_BAD_BLOCKS
,
1071 (TSTR("**>> Block %d needs retiring" TENDSTR
), blockInNAND
));
1076 /* Delete the chunk */
1077 yaffs_DeleteChunk(dev
, chunkInNAND
, 1, __LINE__
);
1081 /*---------------- Name handling functions ------------*/
1083 static __u16
yaffs_CalcNameSum(const YCHAR
* name
)
1088 YUCHAR
*bname
= (YUCHAR
*) name
;
1090 while ((*bname
) && (i
< (YAFFS_MAX_NAME_LENGTH
/2))) {
1092 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1093 sum
+= yaffs_toupper(*bname
) * i
;
1095 sum
+= (*bname
) * i
;
1104 static void yaffs_SetObjectName(yaffs_Object
* obj
, const YCHAR
* name
)
1106 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1107 if (name
&& yaffs_strlen(name
) <= YAFFS_SHORT_NAME_LENGTH
) {
1108 yaffs_strcpy(obj
->shortName
, name
);
1110 obj
->shortName
[0] = _Y('\0');
1113 obj
->sum
= yaffs_CalcNameSum(name
);
1116 /*-------------------- TNODES -------------------
1118 * List of spare tnodes
1119 * The list is hooked together using the first pointer
1123 /* yaffs_CreateTnodes creates a bunch more tnodes and
1124 * adds them to the tnode free list.
1125 * Don't use this function directly
1128 static int yaffs_CreateTnodes(yaffs_Device
* dev
, int nTnodes
)
1132 yaffs_Tnode
*newTnodes
;
1136 yaffs_TnodeList
*tnl
;
1141 /* Calculate the tnode size in bytes for variable width tnode support.
1142 * Must be a multiple of 32-bits */
1143 tnodeSize
= (dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8;
1145 /* make these things */
1147 newTnodes
= YMALLOC(nTnodes
* tnodeSize
);
1148 mem
= (__u8
*)newTnodes
;
1151 T(YAFFS_TRACE_ERROR
,
1152 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR
)));
1156 /* Hook them into the free list */
1158 for (i
= 0; i
< nTnodes
- 1; i
++) {
1159 newTnodes
[i
].internal
[0] = &newTnodes
[i
+ 1];
1160 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1161 newTnodes
[i
].internal
[YAFFS_NTNODES_INTERNAL
] = (void *)1;
1165 newTnodes
[nTnodes
- 1].internal
[0] = dev
->freeTnodes
;
1166 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1167 newTnodes
[nTnodes
- 1].internal
[YAFFS_NTNODES_INTERNAL
] = (void *)1;
1169 dev
->freeTnodes
= newTnodes
;
1171 /* New hookup for wide tnodes */
1172 for(i
= 0; i
< nTnodes
-1; i
++) {
1173 curr
= (yaffs_Tnode
*) &mem
[i
* tnodeSize
];
1174 next
= (yaffs_Tnode
*) &mem
[(i
+1) * tnodeSize
];
1175 curr
->internal
[0] = next
;
1178 curr
= (yaffs_Tnode
*) &mem
[(nTnodes
- 1) * tnodeSize
];
1179 curr
->internal
[0] = dev
->freeTnodes
;
1180 dev
->freeTnodes
= (yaffs_Tnode
*)mem
;
1185 dev
->nFreeTnodes
+= nTnodes
;
1186 dev
->nTnodesCreated
+= nTnodes
;
1188 /* Now add this bunch of tnodes to a list for freeing up.
1189 * NB If we can't add this to the management list it isn't fatal
1190 * but it just means we can't free this bunch of tnodes later.
1193 tnl
= YMALLOC(sizeof(yaffs_TnodeList
));
1195 T(YAFFS_TRACE_ERROR
,
1197 ("yaffs: Could not add tnodes to management list" TENDSTR
)));
1201 tnl
->tnodes
= newTnodes
;
1202 tnl
->next
= dev
->allocatedTnodeList
;
1203 dev
->allocatedTnodeList
= tnl
;
1206 T(YAFFS_TRACE_ALLOCATE
, (TSTR("yaffs: Tnodes added" TENDSTR
)));
1211 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1213 static yaffs_Tnode
*yaffs_GetTnodeRaw(yaffs_Device
* dev
)
1215 yaffs_Tnode
*tn
= NULL
;
1217 /* If there are none left make more */
1218 if (!dev
->freeTnodes
) {
1219 yaffs_CreateTnodes(dev
, YAFFS_ALLOCATION_NTNODES
);
1222 if (dev
->freeTnodes
) {
1223 tn
= dev
->freeTnodes
;
1224 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1225 if (tn
->internal
[YAFFS_NTNODES_INTERNAL
] != (void *)1) {
1226 /* Hoosterman, this thing looks like it isn't in the list */
1227 T(YAFFS_TRACE_ALWAYS
,
1228 (TSTR("yaffs: Tnode list bug 1" TENDSTR
)));
1231 dev
->freeTnodes
= dev
->freeTnodes
->internal
[0];
1238 static yaffs_Tnode
*yaffs_GetTnode(yaffs_Device
* dev
)
1240 yaffs_Tnode
*tn
= yaffs_GetTnodeRaw(dev
);
1243 memset(tn
, 0, (dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8);
1248 /* FreeTnode frees up a tnode and puts it back on the free list */
1249 static void yaffs_FreeTnode(yaffs_Device
* dev
, yaffs_Tnode
* tn
)
1252 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1253 if (tn
->internal
[YAFFS_NTNODES_INTERNAL
] != 0) {
1254 /* Hoosterman, this thing looks like it is already in the list */
1255 T(YAFFS_TRACE_ALWAYS
,
1256 (TSTR("yaffs: Tnode list bug 2" TENDSTR
)));
1258 tn
->internal
[YAFFS_NTNODES_INTERNAL
] = (void *)1;
1260 tn
->internal
[0] = dev
->freeTnodes
;
1261 dev
->freeTnodes
= tn
;
1266 static void yaffs_DeinitialiseTnodes(yaffs_Device
* dev
)
1268 /* Free the list of allocated tnodes */
1269 yaffs_TnodeList
*tmp
;
1271 while (dev
->allocatedTnodeList
) {
1272 tmp
= dev
->allocatedTnodeList
->next
;
1274 YFREE(dev
->allocatedTnodeList
->tnodes
);
1275 YFREE(dev
->allocatedTnodeList
);
1276 dev
->allocatedTnodeList
= tmp
;
1280 dev
->freeTnodes
= NULL
;
1281 dev
->nFreeTnodes
= 0;
1284 static void yaffs_InitialiseTnodes(yaffs_Device
* dev
)
1286 dev
->allocatedTnodeList
= NULL
;
1287 dev
->freeTnodes
= NULL
;
1288 dev
->nFreeTnodes
= 0;
1289 dev
->nTnodesCreated
= 0;
1294 void yaffs_PutLevel0Tnode(yaffs_Device
*dev
, yaffs_Tnode
*tn
, unsigned pos
, unsigned val
)
1296 __u32
*map
= (__u32
*)tn
;
1302 pos
&= YAFFS_TNODES_LEVEL0_MASK
;
1303 val
>>= dev
->chunkGroupBits
;
1305 bitInMap
= pos
* dev
->tnodeWidth
;
1306 wordInMap
= bitInMap
/32;
1307 bitInWord
= bitInMap
& (32 -1);
1309 mask
= dev
->tnodeMask
<< bitInWord
;
1311 map
[wordInMap
] &= ~mask
;
1312 map
[wordInMap
] |= (mask
& (val
<< bitInWord
));
1314 if(dev
->tnodeWidth
> (32-bitInWord
)) {
1315 bitInWord
= (32 - bitInWord
);
1317 mask
= dev
->tnodeMask
>> (/*dev->tnodeWidth -*/ bitInWord
);
1318 map
[wordInMap
] &= ~mask
;
1319 map
[wordInMap
] |= (mask
& (val
>> bitInWord
));
1323 static __u32
yaffs_GetChunkGroupBase(yaffs_Device
*dev
, yaffs_Tnode
*tn
, unsigned pos
)
1325 __u32
*map
= (__u32
*)tn
;
1331 pos
&= YAFFS_TNODES_LEVEL0_MASK
;
1333 bitInMap
= pos
* dev
->tnodeWidth
;
1334 wordInMap
= bitInMap
/32;
1335 bitInWord
= bitInMap
& (32 -1);
1337 val
= map
[wordInMap
] >> bitInWord
;
1339 if(dev
->tnodeWidth
> (32-bitInWord
)) {
1340 bitInWord
= (32 - bitInWord
);
1342 val
|= (map
[wordInMap
] << bitInWord
);
1345 val
&= dev
->tnodeMask
;
1346 val
<<= dev
->chunkGroupBits
;
1351 /* ------------------- End of individual tnode manipulation -----------------*/
1353 /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
1354 * The look up tree is represented by the top tnode and the number of topLevel
1355 * in the tree. 0 means only the level 0 tnode is in the tree.
1358 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
1359 static yaffs_Tnode
*yaffs_FindLevel0Tnode(yaffs_Device
* dev
,
1360 yaffs_FileStructure
* fStruct
,
1364 yaffs_Tnode
*tn
= fStruct
->top
;
1366 int requiredTallness
;
1367 int level
= fStruct
->topLevel
;
1369 /* Check sane level and chunk Id */
1370 if (level
< 0 || level
> YAFFS_TNODES_MAX_LEVEL
) {
1374 if (chunkId
> YAFFS_MAX_CHUNK_ID
) {
1378 /* First check we're tall enough (ie enough topLevel) */
1380 i
= chunkId
>> YAFFS_TNODES_LEVEL0_BITS
;
1381 requiredTallness
= 0;
1383 i
>>= YAFFS_TNODES_INTERNAL_BITS
;
1387 if (requiredTallness
> fStruct
->topLevel
) {
1388 /* Not tall enough, so we can't find it, return NULL. */
1392 /* Traverse down to level 0 */
1393 while (level
> 0 && tn
) {
1395 internal
[(chunkId
>>
1396 ( YAFFS_TNODES_LEVEL0_BITS
+
1398 YAFFS_TNODES_INTERNAL_BITS
)
1400 YAFFS_TNODES_INTERNAL_MASK
];
1408 /* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
1409 * This happens in two steps:
1410 * 1. If the tree isn't tall enough, then make it taller.
1411 * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
1413 * Used when modifying the tree.
1415 * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
1416 * be plugged into the ttree.
1419 static yaffs_Tnode
*yaffs_AddOrFindLevel0Tnode(yaffs_Device
* dev
,
1420 yaffs_FileStructure
* fStruct
,
1422 yaffs_Tnode
*passedTn
)
1425 int requiredTallness
;
1433 /* Check sane level and page Id */
1434 if (fStruct
->topLevel
< 0 || fStruct
->topLevel
> YAFFS_TNODES_MAX_LEVEL
) {
1438 if (chunkId
> YAFFS_MAX_CHUNK_ID
) {
1442 /* First check we're tall enough (ie enough topLevel) */
1444 x
= chunkId
>> YAFFS_TNODES_LEVEL0_BITS
;
1445 requiredTallness
= 0;
1447 x
>>= YAFFS_TNODES_INTERNAL_BITS
;
1452 if (requiredTallness
> fStruct
->topLevel
) {
1453 /* Not tall enough,gotta make the tree taller */
1454 for (i
= fStruct
->topLevel
; i
< requiredTallness
; i
++) {
1456 tn
= yaffs_GetTnode(dev
);
1459 tn
->internal
[0] = fStruct
->top
;
1462 T(YAFFS_TRACE_ERROR
,
1463 (TSTR("yaffs: no more tnodes" TENDSTR
)));
1467 fStruct
->topLevel
= requiredTallness
;
1470 /* Traverse down to level 0, adding anything we need */
1472 l
= fStruct
->topLevel
;
1476 while (l
> 0 && tn
) {
1478 ( YAFFS_TNODES_LEVEL0_BITS
+
1479 (l
- 1) * YAFFS_TNODES_INTERNAL_BITS
)) &
1480 YAFFS_TNODES_INTERNAL_MASK
;
1483 if((l
>1) && !tn
->internal
[x
]){
1484 /* Add missing non-level-zero tnode */
1485 tn
->internal
[x
] = yaffs_GetTnode(dev
);
1488 /* Looking from level 1 at level 0 */
1490 /* If we already have one, then release it.*/
1492 yaffs_FreeTnode(dev
,tn
->internal
[x
]);
1493 tn
->internal
[x
] = passedTn
;
1495 } else if(!tn
->internal
[x
]) {
1496 /* Don't have one, none passed in */
1497 tn
->internal
[x
] = yaffs_GetTnode(dev
);
1501 tn
= tn
->internal
[x
];
1505 /* top is level 0 */
1507 memcpy(tn
,passedTn
,(dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8);
1508 yaffs_FreeTnode(dev
,passedTn
);
1515 static int yaffs_FindChunkInGroup(yaffs_Device
* dev
, int theChunk
,
1516 yaffs_ExtendedTags
* tags
, int objectId
,
1521 for (j
= 0; theChunk
&& j
< dev
->chunkGroupSize
; j
++) {
1522 if (yaffs_CheckChunkBit
1523 (dev
, theChunk
/ dev
->nChunksPerBlock
,
1524 theChunk
% dev
->nChunksPerBlock
)) {
1525 yaffs_ReadChunkWithTagsFromNAND(dev
, theChunk
, NULL
,
1527 if (yaffs_TagsMatch(tags
, objectId
, chunkInInode
)) {
1539 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1540 * chunks and tnodes in the file
1541 * Returns 1 if the tree was deleted.
1542 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1545 static int yaffs_DeleteWorker(yaffs_Object
* in
, yaffs_Tnode
* tn
, __u32 level
,
1546 int chunkOffset
, int *limit
)
1551 yaffs_ExtendedTags tags
;
1553 yaffs_Device
*dev
= in
->myDev
;
1560 for (i
= YAFFS_NTNODES_INTERNAL
- 1; allDone
&& i
>= 0;
1562 if (tn
->internal
[i
]) {
1563 if (limit
&& (*limit
) < 0) {
1567 yaffs_DeleteWorker(in
,
1575 YAFFS_TNODES_INTERNAL_BITS
)
1580 yaffs_FreeTnode(dev
,
1583 tn
->internal
[i
] = NULL
;
1588 return (allDone
) ? 1 : 0;
1589 } else if (level
== 0) {
1592 for (i
= YAFFS_NTNODES_LEVEL0
- 1; i
>= 0 && !hitLimit
;
1594 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,i
);
1599 YAFFS_TNODES_LEVEL0_BITS
) + i
;
1602 yaffs_FindChunkInGroup(dev
,
1608 if (foundChunk
> 0) {
1609 yaffs_DeleteChunk(dev
,
1614 *limit
= *limit
- 1;
1622 yaffs_PutLevel0Tnode(dev
,tn
,i
,0);
1626 return (i
< 0) ? 1 : 0;
1636 static void yaffs_SoftDeleteChunk(yaffs_Device
* dev
, int chunk
)
1639 yaffs_BlockInfo
*theBlock
;
1641 T(YAFFS_TRACE_DELETION
, (TSTR("soft delete chunk %d" TENDSTR
), chunk
));
1643 theBlock
= yaffs_GetBlockInfo(dev
, chunk
/ dev
->nChunksPerBlock
);
1645 theBlock
->softDeletions
++;
1650 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1651 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1653 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1656 static int yaffs_SoftDeleteWorker(yaffs_Object
* in
, yaffs_Tnode
* tn
,
1657 __u32 level
, int chunkOffset
)
1662 yaffs_Device
*dev
= in
->myDev
;
1667 for (i
= YAFFS_NTNODES_INTERNAL
- 1; allDone
&& i
>= 0;
1669 if (tn
->internal
[i
]) {
1671 yaffs_SoftDeleteWorker(in
,
1677 YAFFS_TNODES_INTERNAL_BITS
)
1680 yaffs_FreeTnode(dev
,
1683 tn
->internal
[i
] = NULL
;
1685 /* Hoosterman... how could this happen? */
1689 return (allDone
) ? 1 : 0;
1690 } else if (level
== 0) {
1692 for (i
= YAFFS_NTNODES_LEVEL0
- 1; i
>= 0; i
--) {
1693 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,i
);
1695 /* Note this does not find the real chunk, only the chunk group.
1696 * We make an assumption that a chunk group is not larger than
1699 yaffs_SoftDeleteChunk(dev
, theChunk
);
1700 yaffs_PutLevel0Tnode(dev
,tn
,i
,0);
1714 static void yaffs_SoftDeleteFile(yaffs_Object
* obj
)
1717 obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
&& !obj
->softDeleted
) {
1718 if (obj
->nDataChunks
<= 0) {
1719 /* Empty file with no duplicate object headers, just delete it immediately */
1720 yaffs_FreeTnode(obj
->myDev
,
1721 obj
->variant
.fileVariant
.top
);
1722 obj
->variant
.fileVariant
.top
= NULL
;
1723 T(YAFFS_TRACE_TRACING
,
1724 (TSTR("yaffs: Deleting empty file %d" TENDSTR
),
1726 yaffs_DoGenericObjectDeletion(obj
);
1728 yaffs_SoftDeleteWorker(obj
,
1729 obj
->variant
.fileVariant
.top
,
1730 obj
->variant
.fileVariant
.
1732 obj
->softDeleted
= 1;
1737 /* Pruning removes any part of the file structure tree that is beyond the
1738 * bounds of the file (ie that does not point to chunks).
1740 * A file should only get pruned when its size is reduced.
1742 * Before pruning, the chunks must be pulled from the tree and the
1743 * level 0 tnode entries must be zeroed out.
1744 * Could also use this for file deletion, but that's probably better handled
1745 * by a special case.
1748 static yaffs_Tnode
*yaffs_PruneWorker(yaffs_Device
* dev
, yaffs_Tnode
* tn
,
1749 __u32 level
, int del0
)
1757 for (i
= 0; i
< YAFFS_NTNODES_INTERNAL
; i
++) {
1758 if (tn
->internal
[i
] && level
> 0) {
1760 yaffs_PruneWorker(dev
, tn
->internal
[i
],
1762 (i
== 0) ? del0
: 1);
1765 if (tn
->internal
[i
]) {
1770 if (hasData
== 0 && del0
) {
1771 /* Free and return NULL */
1773 yaffs_FreeTnode(dev
, tn
);
1783 static int yaffs_PruneFileStructure(yaffs_Device
* dev
,
1784 yaffs_FileStructure
* fStruct
)
1791 if (fStruct
->topLevel
> 0) {
1793 yaffs_PruneWorker(dev
, fStruct
->top
, fStruct
->topLevel
, 0);
1795 /* Now we have a tree with all the non-zero branches NULL but the height
1796 * is the same as it was.
1797 * Let's see if we can trim internal tnodes to shorten the tree.
1798 * We can do this if only the 0th element in the tnode is in use
1799 * (ie all the non-zero are NULL)
1802 while (fStruct
->topLevel
&& !done
) {
1806 for (i
= 1; i
< YAFFS_NTNODES_INTERNAL
; i
++) {
1807 if (tn
->internal
[i
]) {
1813 fStruct
->top
= tn
->internal
[0];
1814 fStruct
->topLevel
--;
1815 yaffs_FreeTnode(dev
, tn
);
1825 /*-------------------- End of File Structure functions.-------------------*/
1827 /* yaffs_CreateFreeObjects creates a bunch more objects and
1828 * adds them to the object free list.
1830 static int yaffs_CreateFreeObjects(yaffs_Device
* dev
, int nObjects
)
1833 yaffs_Object
*newObjects
;
1834 yaffs_ObjectList
*list
;
1839 /* make these things */
1840 newObjects
= YMALLOC(nObjects
* sizeof(yaffs_Object
));
1841 list
= YMALLOC(sizeof(yaffs_ObjectList
));
1843 if (!newObjects
|| !list
) {
1848 T(YAFFS_TRACE_ALLOCATE
,
1849 (TSTR("yaffs: Could not allocate more objects" TENDSTR
)));
1853 /* Hook them into the free list */
1854 for (i
= 0; i
< nObjects
- 1; i
++) {
1855 newObjects
[i
].siblings
.next
=
1856 (struct list_head
*)(&newObjects
[i
+ 1]);
1859 newObjects
[nObjects
- 1].siblings
.next
= (void *)dev
->freeObjects
;
1860 dev
->freeObjects
= newObjects
;
1861 dev
->nFreeObjects
+= nObjects
;
1862 dev
->nObjectsCreated
+= nObjects
;
1864 /* Now add this bunch of Objects to a list for freeing up. */
1866 list
->objects
= newObjects
;
1867 list
->next
= dev
->allocatedObjectList
;
1868 dev
->allocatedObjectList
= list
;
1874 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1875 static yaffs_Object
*yaffs_AllocateEmptyObject(yaffs_Device
* dev
)
1877 yaffs_Object
*tn
= NULL
;
1879 /* If there are none left make more */
1880 if (!dev
->freeObjects
) {
1881 yaffs_CreateFreeObjects(dev
, YAFFS_ALLOCATION_NOBJECTS
);
1884 if (dev
->freeObjects
) {
1885 tn
= dev
->freeObjects
;
1887 (yaffs_Object
*) (dev
->freeObjects
->siblings
.next
);
1888 dev
->nFreeObjects
--;
1890 /* Now sweeten it up... */
1892 memset(tn
, 0, sizeof(yaffs_Object
));
1895 tn
->variantType
= YAFFS_OBJECT_TYPE_UNKNOWN
;
1896 INIT_LIST_HEAD(&(tn
->hardLinks
));
1897 INIT_LIST_HEAD(&(tn
->hashLink
));
1898 INIT_LIST_HEAD(&tn
->siblings
);
1900 /* Add it to the lost and found directory.
1901 * NB Can't put root or lostNFound in lostNFound so
1902 * check if lostNFound exists first
1904 if (dev
->lostNFoundDir
) {
1905 yaffs_AddObjectToDirectory(dev
->lostNFoundDir
, tn
);
1912 static yaffs_Object
*yaffs_CreateFakeDirectory(yaffs_Device
* dev
, int number
,
1917 yaffs_CreateNewObject(dev
, number
, YAFFS_OBJECT_TYPE_DIRECTORY
);
1919 obj
->fake
= 1; /* it is fake so it has no NAND presence... */
1920 obj
->renameAllowed
= 0; /* ... and we're not allowed to rename it... */
1921 obj
->unlinkAllowed
= 0; /* ... or unlink it */
1924 obj
->yst_mode
= mode
;
1926 obj
->chunkId
= 0; /* Not a valid chunk. */
1933 static void yaffs_UnhashObject(yaffs_Object
* tn
)
1936 yaffs_Device
*dev
= tn
->myDev
;
1938 /* If it is still linked into the bucket list, free from the list */
1939 if (!list_empty(&tn
->hashLink
)) {
1940 list_del_init(&tn
->hashLink
);
1941 bucket
= yaffs_HashFunction(tn
->objectId
);
1942 dev
->objectBucket
[bucket
].count
--;
1947 /* FreeObject frees up a Object and puts it back on the free list */
1948 static void yaffs_FreeObject(yaffs_Object
* tn
)
1951 yaffs_Device
*dev
= tn
->myDev
;
1955 /* We're still hooked up to a cached inode.
1956 * Don't delete now, but mark for later deletion
1958 tn
->deferedFree
= 1;
1963 yaffs_UnhashObject(tn
);
1965 /* Link into the free list. */
1966 tn
->siblings
.next
= (struct list_head
*)(dev
->freeObjects
);
1967 dev
->freeObjects
= tn
;
1968 dev
->nFreeObjects
++;
1973 void yaffs_HandleDeferedFree(yaffs_Object
* obj
)
1975 if (obj
->deferedFree
) {
1976 yaffs_FreeObject(obj
);
1982 static void yaffs_DeinitialiseObjects(yaffs_Device
* dev
)
1984 /* Free the list of allocated Objects */
1986 yaffs_ObjectList
*tmp
;
1988 while (dev
->allocatedObjectList
) {
1989 tmp
= dev
->allocatedObjectList
->next
;
1990 YFREE(dev
->allocatedObjectList
->objects
);
1991 YFREE(dev
->allocatedObjectList
);
1993 dev
->allocatedObjectList
= tmp
;
1996 dev
->freeObjects
= NULL
;
1997 dev
->nFreeObjects
= 0;
2000 static void yaffs_InitialiseObjects(yaffs_Device
* dev
)
2004 dev
->allocatedObjectList
= NULL
;
2005 dev
->freeObjects
= NULL
;
2006 dev
->nFreeObjects
= 0;
2008 for (i
= 0; i
< YAFFS_NOBJECT_BUCKETS
; i
++) {
2009 INIT_LIST_HEAD(&dev
->objectBucket
[i
].list
);
2010 dev
->objectBucket
[i
].count
= 0;
2015 static int yaffs_FindNiceObjectBucket(yaffs_Device
* dev
)
2020 int lowest
= 999999;
2022 /* First let's see if we can find one that's empty. */
2024 for (i
= 0; i
< 10 && lowest
> 0; i
++) {
2026 x
%= YAFFS_NOBJECT_BUCKETS
;
2027 if (dev
->objectBucket
[x
].count
< lowest
) {
2028 lowest
= dev
->objectBucket
[x
].count
;
2034 /* If we didn't find an empty list, then try
2035 * looking a bit further for a short one
2038 for (i
= 0; i
< 10 && lowest
> 3; i
++) {
2040 x
%= YAFFS_NOBJECT_BUCKETS
;
2041 if (dev
->objectBucket
[x
].count
< lowest
) {
2042 lowest
= dev
->objectBucket
[x
].count
;
2051 static int yaffs_CreateNewObjectNumber(yaffs_Device
* dev
)
2053 int bucket
= yaffs_FindNiceObjectBucket(dev
);
2055 /* Now find an object value that has not already been taken
2056 * by scanning the list.
2060 struct list_head
*i
;
2062 __u32 n
= (__u32
) bucket
;
2064 /* yaffs_CheckObjectHashSanity(); */
2068 n
+= YAFFS_NOBJECT_BUCKETS
;
2069 if (1 || dev
->objectBucket
[bucket
].count
> 0) {
2070 list_for_each(i
, &dev
->objectBucket
[bucket
].list
) {
2071 /* If there is already one in the list */
2073 && list_entry(i
, yaffs_Object
,
2074 hashLink
)->objectId
== n
) {
2085 static void yaffs_HashObject(yaffs_Object
* in
)
2087 int bucket
= yaffs_HashFunction(in
->objectId
);
2088 yaffs_Device
*dev
= in
->myDev
;
2090 list_add(&in
->hashLink
, &dev
->objectBucket
[bucket
].list
);
2091 dev
->objectBucket
[bucket
].count
++;
2095 yaffs_Object
*yaffs_FindObjectByNumber(yaffs_Device
* dev
, __u32 number
)
2097 int bucket
= yaffs_HashFunction(number
);
2098 struct list_head
*i
;
2101 list_for_each(i
, &dev
->objectBucket
[bucket
].list
) {
2102 /* Look if it is in the list */
2104 in
= list_entry(i
, yaffs_Object
, hashLink
);
2105 if (in
->objectId
== number
) {
2107 /* Don't tell the VFS about this one if it is defered free */
2108 if (in
->deferedFree
)
2120 yaffs_Object
*yaffs_CreateNewObject(yaffs_Device
* dev
, int number
,
2121 yaffs_ObjectType type
)
2124 yaffs_Object
*theObject
;
2128 number
= yaffs_CreateNewObjectNumber(dev
);
2131 theObject
= yaffs_AllocateEmptyObject(dev
);
2135 if(type
== YAFFS_OBJECT_TYPE_FILE
){
2136 tn
= yaffs_GetTnode(dev
);
2138 yaffs_FreeObject(theObject
);
2146 theObject
->fake
= 0;
2147 theObject
->renameAllowed
= 1;
2148 theObject
->unlinkAllowed
= 1;
2149 theObject
->objectId
= number
;
2150 yaffs_HashObject(theObject
);
2151 theObject
->variantType
= type
;
2152 #ifdef CONFIG_YAFFS_WINCE
2153 yfsd_WinFileTimeNow(theObject
->win_atime
);
2154 theObject
->win_ctime
[0] = theObject
->win_mtime
[0] =
2155 theObject
->win_atime
[0];
2156 theObject
->win_ctime
[1] = theObject
->win_mtime
[1] =
2157 theObject
->win_atime
[1];
2161 theObject
->yst_atime
= theObject
->yst_mtime
=
2162 theObject
->yst_ctime
= Y_CURRENT_TIME
;
2165 case YAFFS_OBJECT_TYPE_FILE
:
2166 theObject
->variant
.fileVariant
.fileSize
= 0;
2167 theObject
->variant
.fileVariant
.scannedFileSize
= 0;
2168 theObject
->variant
.fileVariant
.shrinkSize
= 0xFFFFFFFF; /* max __u32 */
2169 theObject
->variant
.fileVariant
.topLevel
= 0;
2170 theObject
->variant
.fileVariant
.top
= tn
;
2172 case YAFFS_OBJECT_TYPE_DIRECTORY
:
2173 INIT_LIST_HEAD(&theObject
->variant
.directoryVariant
.
2176 case YAFFS_OBJECT_TYPE_SYMLINK
:
2177 case YAFFS_OBJECT_TYPE_HARDLINK
:
2178 case YAFFS_OBJECT_TYPE_SPECIAL
:
2179 /* No action required */
2181 case YAFFS_OBJECT_TYPE_UNKNOWN
:
2182 /* todo this should not happen */
2190 static yaffs_Object
*yaffs_FindOrCreateObjectByNumber(yaffs_Device
* dev
,
2192 yaffs_ObjectType type
)
2194 yaffs_Object
*theObject
= NULL
;
2197 theObject
= yaffs_FindObjectByNumber(dev
, number
);
2201 theObject
= yaffs_CreateNewObject(dev
, number
, type
);
2209 static YCHAR
*yaffs_CloneString(const YCHAR
* str
)
2211 YCHAR
*newStr
= NULL
;
2214 newStr
= YMALLOC((yaffs_strlen(str
) + 1) * sizeof(YCHAR
));
2216 yaffs_strcpy(newStr
, str
);
2224 * Mknod (create) a new object.
2225 * equivalentObject only has meaning for a hard link;
2226 * aliasString only has meaning for a sumlink.
2227 * rdev only has meaning for devices (a subset of special objects)
2230 static yaffs_Object
*yaffs_MknodObject(yaffs_ObjectType type
,
2231 yaffs_Object
* parent
,
2236 yaffs_Object
* equivalentObject
,
2237 const YCHAR
* aliasString
, __u32 rdev
)
2242 yaffs_Device
*dev
= parent
->myDev
;
2244 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2245 if (yaffs_FindObjectByName(parent
, name
)) {
2249 in
= yaffs_CreateNewObject(dev
, -1, type
);
2251 if(type
== YAFFS_OBJECT_TYPE_SYMLINK
){
2252 str
= yaffs_CloneString(aliasString
);
2254 yaffs_FreeObject(in
);
2264 in
->variantType
= type
;
2266 in
->yst_mode
= mode
;
2268 #ifdef CONFIG_YAFFS_WINCE
2269 yfsd_WinFileTimeNow(in
->win_atime
);
2270 in
->win_ctime
[0] = in
->win_mtime
[0] = in
->win_atime
[0];
2271 in
->win_ctime
[1] = in
->win_mtime
[1] = in
->win_atime
[1];
2274 in
->yst_atime
= in
->yst_mtime
= in
->yst_ctime
= Y_CURRENT_TIME
;
2276 in
->yst_rdev
= rdev
;
2280 in
->nDataChunks
= 0;
2282 yaffs_SetObjectName(in
, name
);
2285 yaffs_AddObjectToDirectory(parent
, in
);
2287 in
->myDev
= parent
->myDev
;
2290 case YAFFS_OBJECT_TYPE_SYMLINK
:
2291 in
->variant
.symLinkVariant
.alias
= str
;
2293 case YAFFS_OBJECT_TYPE_HARDLINK
:
2294 in
->variant
.hardLinkVariant
.equivalentObject
=
2296 in
->variant
.hardLinkVariant
.equivalentObjectId
=
2297 equivalentObject
->objectId
;
2298 list_add(&in
->hardLinks
, &equivalentObject
->hardLinks
);
2300 case YAFFS_OBJECT_TYPE_FILE
:
2301 case YAFFS_OBJECT_TYPE_DIRECTORY
:
2302 case YAFFS_OBJECT_TYPE_SPECIAL
:
2303 case YAFFS_OBJECT_TYPE_UNKNOWN
:
2308 if (yaffs_UpdateObjectHeader(in
, name
, 0, 0, 0) < 0) {
2309 /* Could not create the object header, fail the creation */
2310 yaffs_DestroyObject(in
);
2319 yaffs_Object
*yaffs_MknodFile(yaffs_Object
* parent
, const YCHAR
* name
,
2320 __u32 mode
, __u32 uid
, __u32 gid
)
2322 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE
, parent
, name
, mode
,
2323 uid
, gid
, NULL
, NULL
, 0);
2326 yaffs_Object
*yaffs_MknodDirectory(yaffs_Object
* parent
, const YCHAR
* name
,
2327 __u32 mode
, __u32 uid
, __u32 gid
)
2329 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY
, parent
, name
,
2330 mode
, uid
, gid
, NULL
, NULL
, 0);
2333 yaffs_Object
*yaffs_MknodSpecial(yaffs_Object
* parent
, const YCHAR
* name
,
2334 __u32 mode
, __u32 uid
, __u32 gid
, __u32 rdev
)
2336 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL
, parent
, name
, mode
,
2337 uid
, gid
, NULL
, NULL
, rdev
);
2340 yaffs_Object
*yaffs_MknodSymLink(yaffs_Object
* parent
, const YCHAR
* name
,
2341 __u32 mode
, __u32 uid
, __u32 gid
,
2342 const YCHAR
* alias
)
2344 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK
, parent
, name
, mode
,
2345 uid
, gid
, NULL
, alias
, 0);
2348 /* yaffs_Link returns the object id of the equivalent object.*/
2349 yaffs_Object
*yaffs_Link(yaffs_Object
* parent
, const YCHAR
* name
,
2350 yaffs_Object
* equivalentObject
)
2352 /* Get the real object in case we were fed a hard link as an equivalent object */
2353 equivalentObject
= yaffs_GetEquivalentObject(equivalentObject
);
2355 if (yaffs_MknodObject
2356 (YAFFS_OBJECT_TYPE_HARDLINK
, parent
, name
, 0, 0, 0,
2357 equivalentObject
, NULL
, 0)) {
2358 return equivalentObject
;
2365 static int yaffs_ChangeObjectName(yaffs_Object
* obj
, yaffs_Object
* newDir
,
2366 const YCHAR
* newName
, int force
, int shadows
)
2371 yaffs_Object
*existingTarget
;
2373 if (newDir
== NULL
) {
2374 newDir
= obj
->parent
; /* use the old directory */
2377 if (newDir
->variantType
!= YAFFS_OBJECT_TYPE_DIRECTORY
) {
2378 T(YAFFS_TRACE_ALWAYS
,
2380 ("tragendy: yaffs_ChangeObjectName: newDir is not a directory"
2385 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2386 if (obj
->myDev
->isYaffs2
) {
2387 unlinkOp
= (newDir
== obj
->myDev
->unlinkedDir
);
2389 unlinkOp
= (newDir
== obj
->myDev
->unlinkedDir
2390 && obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
);
2393 deleteOp
= (newDir
== obj
->myDev
->deletedDir
);
2395 existingTarget
= yaffs_FindObjectByName(newDir
, newName
);
2397 /* If the object is a file going into the unlinked directory,
2398 * then it is OK to just stuff it in since duplicate names are allowed.
2399 * else only proceed if the new name does not exist and if we're putting
2400 * it into a directory.
2407 newDir
->variantType
== YAFFS_OBJECT_TYPE_DIRECTORY
) {
2408 yaffs_SetObjectName(obj
, newName
);
2411 yaffs_AddObjectToDirectory(newDir
, obj
);
2416 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2417 if (yaffs_UpdateObjectHeader(obj
, newName
, 0, deleteOp
, shadows
)>= 0)
2424 int yaffs_RenameObject(yaffs_Object
* oldDir
, const YCHAR
* oldName
,
2425 yaffs_Object
* newDir
, const YCHAR
* newName
)
2428 yaffs_Object
*existingTarget
;
2431 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2432 /* Special case for case insemsitive systems (eg. WinCE).
2433 * While look-up is case insensitive, the name isn't.
2434 * Therefore we might want to change x.txt to X.txt
2436 if (oldDir
== newDir
&& yaffs_strcmp(oldName
, newName
) == 0) {
2441 obj
= yaffs_FindObjectByName(oldDir
, oldName
);
2442 /* Check new name to long. */
2443 if (obj
->variantType
== YAFFS_OBJECT_TYPE_SYMLINK
&&
2444 yaffs_strlen(newName
) > YAFFS_MAX_ALIAS_LENGTH
)
2447 else if (obj
->variantType
!= YAFFS_OBJECT_TYPE_SYMLINK
&&
2448 yaffs_strlen(newName
) > YAFFS_MAX_NAME_LENGTH
)
2452 if (obj
&& obj
->renameAllowed
) {
2454 /* Now do the handling for an existing target, if there is one */
2456 existingTarget
= yaffs_FindObjectByName(newDir
, newName
);
2457 if (existingTarget
&&
2458 existingTarget
->variantType
== YAFFS_OBJECT_TYPE_DIRECTORY
&&
2459 !list_empty(&existingTarget
->variant
.directoryVariant
.children
)) {
2460 /* There is a target that is a non-empty directory, so we fail */
2461 return YAFFS_FAIL
; /* EEXIST or ENOTEMPTY */
2462 } else if (existingTarget
&& existingTarget
!= obj
) {
2463 /* Nuke the target first, using shadowing,
2464 * but only if it isn't the same object
2466 yaffs_ChangeObjectName(obj
, newDir
, newName
, force
,
2467 existingTarget
->objectId
);
2468 yaffs_UnlinkObject(existingTarget
);
2471 return yaffs_ChangeObjectName(obj
, newDir
, newName
, 1, 0);
2476 /*------------------------- Block Management and Page Allocation ----------------*/
2478 static int yaffs_InitialiseBlocks(yaffs_Device
* dev
)
2480 int nBlocks
= dev
->internalEndBlock
- dev
->internalStartBlock
+ 1;
2482 dev
->blockInfo
= NULL
;
2483 dev
->chunkBits
= NULL
;
2485 dev
->allocationBlock
= -1; /* force it to get a new one */
2487 /* If the first allocation strategy fails, thry the alternate one */
2488 dev
->blockInfo
= YMALLOC(nBlocks
* sizeof(yaffs_BlockInfo
));
2489 if(!dev
->blockInfo
){
2490 dev
->blockInfo
= YMALLOC_ALT(nBlocks
* sizeof(yaffs_BlockInfo
));
2491 dev
->blockInfoAlt
= 1;
2494 dev
->blockInfoAlt
= 0;
2498 /* Set up dynamic blockinfo stuff. */
2499 dev
->chunkBitmapStride
= (dev
->nChunksPerBlock
+ 7) / 8; /* round up bytes */
2500 dev
->chunkBits
= YMALLOC(dev
->chunkBitmapStride
* nBlocks
);
2501 if(!dev
->chunkBits
){
2502 dev
->chunkBits
= YMALLOC_ALT(dev
->chunkBitmapStride
* nBlocks
);
2503 dev
->chunkBitsAlt
= 1;
2506 dev
->chunkBitsAlt
= 0;
2509 if (dev
->blockInfo
&& dev
->chunkBits
) {
2510 memset(dev
->blockInfo
, 0, nBlocks
* sizeof(yaffs_BlockInfo
));
2511 memset(dev
->chunkBits
, 0, dev
->chunkBitmapStride
* nBlocks
);
2519 static void yaffs_DeinitialiseBlocks(yaffs_Device
* dev
)
2521 if(dev
->blockInfoAlt
&& dev
->blockInfo
)
2522 YFREE_ALT(dev
->blockInfo
);
2523 else if(dev
->blockInfo
)
2524 YFREE(dev
->blockInfo
);
2526 dev
->blockInfoAlt
= 0;
2528 dev
->blockInfo
= NULL
;
2530 if(dev
->chunkBitsAlt
&& dev
->chunkBits
)
2531 YFREE_ALT(dev
->chunkBits
);
2532 else if(dev
->chunkBits
)
2533 YFREE(dev
->chunkBits
);
2534 dev
->chunkBitsAlt
= 0;
2535 dev
->chunkBits
= NULL
;
2538 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device
* dev
,
2539 yaffs_BlockInfo
* bi
)
2546 return 1; /* disqualification only applies to yaffs2. */
2548 if (!bi
->hasShrinkHeader
)
2549 return 1; /* can gc */
2551 /* Find the oldest dirty sequence number if we don't know it and save it
2552 * so we don't have to keep recomputing it.
2554 if (!dev
->oldestDirtySequence
) {
2555 seq
= dev
->sequenceNumber
;
2557 for (i
= dev
->internalStartBlock
; i
<= dev
->internalEndBlock
;
2559 b
= yaffs_GetBlockInfo(dev
, i
);
2560 if (b
->blockState
== YAFFS_BLOCK_STATE_FULL
&&
2561 (b
->pagesInUse
- b
->softDeletions
) <
2562 dev
->nChunksPerBlock
&& b
->sequenceNumber
< seq
) {
2563 seq
= b
->sequenceNumber
;
2566 dev
->oldestDirtySequence
= seq
;
2569 /* Can't do gc of this block if there are any blocks older than this one that have
2572 return (bi
->sequenceNumber
<= dev
->oldestDirtySequence
);
2576 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2577 * for garbage collection.
2580 static int yaffs_FindBlockForGarbageCollection(yaffs_Device
* dev
,
2584 int b
= dev
->currentDirtyChecker
;
2591 yaffs_BlockInfo
*bi
;
2592 int pendingPrioritisedExist
= 0;
2594 /* First let's see if we need to grab a prioritised block */
2595 if(dev
->hasPendingPrioritisedGCs
){
2596 for(i
= dev
->internalStartBlock
; i
< dev
->internalEndBlock
&& !prioritised
; i
++){
2598 bi
= yaffs_GetBlockInfo(dev
, i
);
2599 //yaffs_VerifyBlock(dev,bi,i);
2601 if(bi
->gcPrioritise
) {
2602 pendingPrioritisedExist
= 1;
2603 if(bi
->blockState
== YAFFS_BLOCK_STATE_FULL
&&
2604 yaffs_BlockNotDisqualifiedFromGC(dev
, bi
)){
2605 pagesInUse
= (bi
->pagesInUse
- bi
->softDeletions
);
2608 aggressive
= 1; /* Fool the non-aggressive skip logiv below */
2613 if(!pendingPrioritisedExist
) /* None found, so we can clear this */
2614 dev
->hasPendingPrioritisedGCs
= 0;
2617 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2619 * else (we're doing a leasurely gc), then we only bother to do this if the
2620 * block has only a few pages in use.
2623 dev
->nonAggressiveSkip
--;
2625 if (!aggressive
&& (dev
->nonAggressiveSkip
> 0)) {
2631 (aggressive
) ? dev
->nChunksPerBlock
: YAFFS_PASSIVE_GC_CHUNKS
+ 1;
2635 dev
->internalEndBlock
- dev
->internalStartBlock
+ 1;
2638 dev
->internalEndBlock
- dev
->internalStartBlock
+ 1;
2639 iterations
= iterations
/ 16;
2640 if (iterations
> 200) {
2645 for (i
= 0; i
<= iterations
&& pagesInUse
> 0 && !prioritised
; i
++) {
2647 if (b
< dev
->internalStartBlock
|| b
> dev
->internalEndBlock
) {
2648 b
= dev
->internalStartBlock
;
2651 if (b
< dev
->internalStartBlock
|| b
> dev
->internalEndBlock
) {
2652 T(YAFFS_TRACE_ERROR
,
2653 (TSTR("**>> Block %d is not valid" TENDSTR
), b
));
2657 bi
= yaffs_GetBlockInfo(dev
, b
);
2660 if (bi
->blockState
== YAFFS_BLOCK_STATE_CHECKPOINT
) {
2667 if (bi
->blockState
== YAFFS_BLOCK_STATE_FULL
&&
2668 (bi
->pagesInUse
- bi
->softDeletions
) < pagesInUse
&&
2669 yaffs_BlockNotDisqualifiedFromGC(dev
, bi
)) {
2671 pagesInUse
= (bi
->pagesInUse
- bi
->softDeletions
);
2675 dev
->currentDirtyChecker
= b
;
2679 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR
), dirtiest
,
2680 dev
->nChunksPerBlock
- pagesInUse
,prioritised
));
2683 dev
->oldestDirtySequence
= 0;
2686 dev
->nonAggressiveSkip
= 4;
2692 static void yaffs_BlockBecameDirty(yaffs_Device
* dev
, int blockNo
)
2694 yaffs_BlockInfo
*bi
= yaffs_GetBlockInfo(dev
, blockNo
);
2698 /* If the block is still healthy erase it and mark as clean.
2699 * If the block has had a data failure, then retire it.
2702 T(YAFFS_TRACE_GC
| YAFFS_TRACE_ERASE
,
2703 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR
),
2704 blockNo
, bi
->blockState
, (bi
->needsRetiring
) ? "needs retiring" : ""));
2706 bi
->blockState
= YAFFS_BLOCK_STATE_DIRTY
;
2708 if (!bi
->needsRetiring
) {
2709 yaffs_InvalidateCheckpoint(dev
);
2710 erasedOk
= yaffs_EraseBlockInNAND(dev
, blockNo
);
2712 dev
->nErasureFailures
++;
2713 T(YAFFS_TRACE_ERROR
| YAFFS_TRACE_BAD_BLOCKS
,
2714 (TSTR("**>> Erasure failed %d" TENDSTR
), blockNo
));
2719 ((yaffs_traceMask
& YAFFS_TRACE_ERASE
) || !yaffs_SkipVerification(dev
))) {
2721 for (i
= 0; i
< dev
->nChunksPerBlock
; i
++) {
2722 if (!yaffs_CheckChunkErased
2723 (dev
, blockNo
* dev
->nChunksPerBlock
+ i
)) {
2724 T(YAFFS_TRACE_ERROR
,
2726 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2727 TENDSTR
), blockNo
, i
));
2733 /* Clean it up... */
2734 bi
->blockState
= YAFFS_BLOCK_STATE_EMPTY
;
2735 dev
->nErasedBlocks
++;
2737 bi
->softDeletions
= 0;
2738 bi
->hasShrinkHeader
= 0;
2739 bi
->skipErasedCheck
= 1; /* This is clean, so no need to check */
2740 bi
->gcPrioritise
= 0;
2741 yaffs_ClearChunkBits(dev
, blockNo
);
2743 T(YAFFS_TRACE_ERASE
,
2744 (TSTR("Erased block %d" TENDSTR
), blockNo
));
2746 dev
->nFreeChunks
-= dev
->nChunksPerBlock
; /* We lost a block of free space */
2748 yaffs_RetireBlock(dev
, blockNo
);
2749 T(YAFFS_TRACE_ERROR
| YAFFS_TRACE_BAD_BLOCKS
,
2750 (TSTR("**>> Block %d retired" TENDSTR
), blockNo
));
2754 static int yaffs_FindBlockForAllocation(yaffs_Device
* dev
)
2758 yaffs_BlockInfo
*bi
;
2760 if (dev
->nErasedBlocks
< 1) {
2761 /* Hoosterman we've got a problem.
2762 * Can't get space to gc
2764 T(YAFFS_TRACE_ERROR
,
2765 (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR
)));
2770 /* Find an empty block. */
2772 for (i
= dev
->internalStartBlock
; i
<= dev
->internalEndBlock
; i
++) {
2773 dev
->allocationBlockFinder
++;
2774 if (dev
->allocationBlockFinder
< dev
->internalStartBlock
2775 || dev
->allocationBlockFinder
> dev
->internalEndBlock
) {
2776 dev
->allocationBlockFinder
= dev
->internalStartBlock
;
2779 bi
= yaffs_GetBlockInfo(dev
, dev
->allocationBlockFinder
);
2781 if (bi
->blockState
== YAFFS_BLOCK_STATE_EMPTY
) {
2782 bi
->blockState
= YAFFS_BLOCK_STATE_ALLOCATING
;
2783 dev
->sequenceNumber
++;
2784 bi
->sequenceNumber
= dev
->sequenceNumber
;
2785 dev
->nErasedBlocks
--;
2786 T(YAFFS_TRACE_ALLOCATE
,
2787 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR
),
2788 dev
->allocationBlockFinder
, dev
->sequenceNumber
,
2789 dev
->nErasedBlocks
));
2790 return dev
->allocationBlockFinder
;
2794 T(YAFFS_TRACE_ALWAYS
,
2796 ("yaffs tragedy: no more eraased blocks, but there should have been %d"
2797 TENDSTR
), dev
->nErasedBlocks
));
2803 // Check if there's space to allocate...
2804 // Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2805 static int yaffs_CheckSpaceForAllocation(yaffs_Device
* dev
)
2808 int reservedBlocks
= dev
->nReservedBlocks
;
2809 int checkpointBlocks
;
2811 checkpointBlocks
= dev
->nCheckpointReservedBlocks
- dev
->blocksInCheckpoint
;
2812 if(checkpointBlocks
< 0)
2813 checkpointBlocks
= 0;
2815 reservedChunks
= ((reservedBlocks
+ checkpointBlocks
) * dev
->nChunksPerBlock
);
2817 return (dev
->nFreeChunks
> reservedChunks
);
2820 static int yaffs_AllocateChunk(yaffs_Device
* dev
, int useReserve
, yaffs_BlockInfo
**blockUsedPtr
)
2823 yaffs_BlockInfo
*bi
;
2825 if (dev
->allocationBlock
< 0) {
2826 /* Get next block to allocate off */
2827 dev
->allocationBlock
= yaffs_FindBlockForAllocation(dev
);
2828 dev
->allocationPage
= 0;
2831 if (!useReserve
&& !yaffs_CheckSpaceForAllocation(dev
)) {
2832 /* Not enough space to allocate unless we're allowed to use the reserve. */
2836 if (dev
->nErasedBlocks
< dev
->nReservedBlocks
2837 && dev
->allocationPage
== 0) {
2838 T(YAFFS_TRACE_ALLOCATE
, (TSTR("Allocating reserve" TENDSTR
)));
2841 /* Next page please.... */
2842 if (dev
->allocationBlock
>= 0) {
2843 bi
= yaffs_GetBlockInfo(dev
, dev
->allocationBlock
);
2845 retVal
= (dev
->allocationBlock
* dev
->nChunksPerBlock
) +
2846 dev
->allocationPage
;
2848 yaffs_SetChunkBit(dev
, dev
->allocationBlock
,
2849 dev
->allocationPage
);
2851 dev
->allocationPage
++;
2855 /* If the block is full set the state to full */
2856 if (dev
->allocationPage
>= dev
->nChunksPerBlock
) {
2857 bi
->blockState
= YAFFS_BLOCK_STATE_FULL
;
2858 dev
->allocationBlock
= -1;
2867 T(YAFFS_TRACE_ERROR
,
2868 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR
)));
2873 static int yaffs_GetErasedChunks(yaffs_Device
* dev
)
2877 n
= dev
->nErasedBlocks
* dev
->nChunksPerBlock
;
2879 if (dev
->allocationBlock
> 0) {
2880 n
+= (dev
->nChunksPerBlock
- dev
->allocationPage
);
2887 static int yaffs_GarbageCollectBlock(yaffs_Device
* dev
, int block
)
2893 int retVal
= YAFFS_OK
;
2896 int isCheckpointBlock
;
2899 int chunksBefore
= yaffs_GetErasedChunks(dev
);
2902 yaffs_ExtendedTags tags
;
2904 yaffs_BlockInfo
*bi
= yaffs_GetBlockInfo(dev
, block
);
2906 yaffs_Object
*object
;
2908 isCheckpointBlock
= (bi
->blockState
== YAFFS_BLOCK_STATE_CHECKPOINT
);
2910 bi
->blockState
= YAFFS_BLOCK_STATE_COLLECTING
;
2912 T(YAFFS_TRACE_TRACING
,
2913 (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR
), block
,
2914 bi
->pagesInUse
, bi
->hasShrinkHeader
));
2916 /*yaffs_VerifyFreeChunks(dev); */
2918 bi
->hasShrinkHeader
= 0; /* clear the flag so that the block can erase */
2920 /* Take off the number of soft deleted entries because
2921 * they're going to get really deleted during GC.
2923 dev
->nFreeChunks
-= bi
->softDeletions
;
2927 if (isCheckpointBlock
||
2928 !yaffs_StillSomeChunkBits(dev
, block
)) {
2929 T(YAFFS_TRACE_TRACING
,
2931 ("Collecting block %d that has no chunks in use" TENDSTR
),
2933 yaffs_BlockBecameDirty(dev
, block
);
2936 __u8
*buffer
= yaffs_GetTempBuffer(dev
, __LINE__
);
2938 yaffs_VerifyBlock(dev
,bi
,block
);
2940 for (chunkInBlock
= 0, oldChunk
= block
* dev
->nChunksPerBlock
;
2941 chunkInBlock
< dev
->nChunksPerBlock
2942 && yaffs_StillSomeChunkBits(dev
, block
);
2943 chunkInBlock
++, oldChunk
++) {
2944 if (yaffs_CheckChunkBit(dev
, block
, chunkInBlock
)) {
2946 /* This page is in use and might need to be copied off */
2950 yaffs_InitialiseTags(&tags
);
2952 yaffs_ReadChunkWithTagsFromNAND(dev
, oldChunk
,
2956 yaffs_FindObjectByNumber(dev
,
2959 T(YAFFS_TRACE_GC_DETAIL
,
2961 ("Collecting page %d, %d %d %d " TENDSTR
),
2962 chunkInBlock
, tags
.objectId
, tags
.chunkId
,
2965 if(object
&& !yaffs_SkipVerification(dev
)){
2966 if(tags
.chunkId
== 0)
2967 matchingChunk
= object
->chunkId
;
2968 else if(object
->softDeleted
)
2969 matchingChunk
= oldChunk
; /* Defeat the test */
2971 matchingChunk
= yaffs_FindChunkInFile(object
,tags
.chunkId
,NULL
);
2973 if(oldChunk
!= matchingChunk
)
2974 T(YAFFS_TRACE_ERROR
,
2975 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR
),
2976 oldChunk
,matchingChunk
,tags
.objectId
, tags
.chunkId
));
2981 T(YAFFS_TRACE_ERROR
,
2983 ("page %d in gc has no object: %d %d %d "
2985 tags
.objectId
, tags
.chunkId
, tags
.byteCount
));
2988 if (object
&& object
->deleted
2989 && tags
.chunkId
!= 0) {
2990 /* Data chunk in a deleted file, throw it away
2991 * It's a soft deleted data chunk,
2992 * No need to copy this, just forget about it and
2993 * fix up the object.
2996 object
->nDataChunks
--;
2998 if (object
->nDataChunks
<= 0) {
2999 /* remeber to clean up the object */
3000 dev
->gcCleanupList
[cleanups
] =
3006 /* Todo object && object->deleted && object->nDataChunks == 0 */
3008 /* Deleted object header with no data chunks.
3009 * Can be discarded and the file deleted.
3011 object
->chunkId
= 0;
3012 yaffs_FreeTnode(object
->myDev
,
3015 object
->variant
.fileVariant
.top
= NULL
;
3016 yaffs_DoGenericObjectDeletion(object
);
3018 } else if (object
) {
3019 /* It's either a data chunk in a live file or
3020 * an ObjectHeader, so we're interested in it.
3021 * NB Need to keep the ObjectHeaders of deleted files
3022 * until the whole file has been deleted off
3024 tags
.serialNumber
++;
3028 if (tags
.chunkId
== 0) {
3029 /* It is an object Id,
3030 * We need to nuke the shrinkheader flags first
3031 * We no longer want the shrinkHeader flag since its work is done
3032 * and if it is left in place it will mess up scanning.
3033 * Also, clear out any shadowing stuff
3036 yaffs_ObjectHeader
*oh
;
3037 oh
= (yaffs_ObjectHeader
*)buffer
;
3039 oh
->shadowsObject
= -1;
3040 tags
.extraShadows
= 0;
3041 tags
.extraIsShrinkHeader
= 0;
3043 yaffs_VerifyObjectHeader(object
,oh
,&tags
,1);
3047 yaffs_WriteNewChunkWithTagsToNAND(dev
, buffer
, &tags
, 1);
3050 retVal
= YAFFS_FAIL
;
3053 /* Ok, now fix up the Tnodes etc. */
3055 if (tags
.chunkId
== 0) {
3057 object
->chunkId
= newChunk
;
3058 object
->serial
= tags
.serialNumber
;
3060 /* It's a data chunk */
3061 yaffs_PutChunkIntoFile
3069 yaffs_DeleteChunk(dev
, oldChunk
, markNAND
, __LINE__
);
3074 yaffs_ReleaseTempBuffer(dev
, buffer
, __LINE__
);
3077 /* Do any required cleanups */
3078 for (i
= 0; i
< cleanups
; i
++) {
3079 /* Time to delete the file too */
3081 yaffs_FindObjectByNumber(dev
,
3082 dev
->gcCleanupList
[i
]);
3084 yaffs_FreeTnode(dev
,
3085 object
->variant
.fileVariant
.
3087 object
->variant
.fileVariant
.top
= NULL
;
3090 ("yaffs: About to finally delete object %d"
3091 TENDSTR
), object
->objectId
));
3092 yaffs_DoGenericObjectDeletion(object
);
3093 object
->myDev
->nDeletedFiles
--;
3100 yaffs_VerifyCollectedBlock(dev
,bi
,block
);
3102 if (chunksBefore
>= (chunksAfter
= yaffs_GetErasedChunks(dev
))) {
3105 ("gc did not increase free chunks before %d after %d"
3106 TENDSTR
), chunksBefore
, chunksAfter
));
3114 /* New garbage collector
3115 * If we're very low on erased blocks then we do aggressive garbage collection
3116 * otherwise we do "leasurely" garbage collection.
3117 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3118 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3120 * The idea is to help clear out space in a more spread-out manner.
3121 * Dunno if it really does anything useful.
3123 static int yaffs_CheckGarbageCollection(yaffs_Device
* dev
)
3127 int gcOk
= YAFFS_OK
;
3130 int checkpointBlockAdjust
;
3132 if (dev
->isDoingGC
) {
3133 /* Bail out so we don't get recursive gc */
3137 /* This loop should pass the first time.
3138 * We'll only see looping here if the erase of the collected block fails.
3144 checkpointBlockAdjust
= (dev
->nCheckpointReservedBlocks
- dev
->blocksInCheckpoint
);
3145 if(checkpointBlockAdjust
< 0)
3146 checkpointBlockAdjust
= 0;
3148 if (dev
->nErasedBlocks
< (dev
->nReservedBlocks
+ checkpointBlockAdjust
+ 2)) {
3149 /* We need a block soon...*/
3152 /* We're in no hurry */
3156 block
= yaffs_FindBlockForGarbageCollection(dev
, aggressive
);
3159 dev
->garbageCollections
++;
3161 dev
->passiveGarbageCollections
++;
3166 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR
),
3167 dev
->nErasedBlocks
, aggressive
));
3169 gcOk
= yaffs_GarbageCollectBlock(dev
, block
);
3172 if (dev
->nErasedBlocks
< (dev
->nReservedBlocks
) && block
> 0) {
3175 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3176 TENDSTR
), dev
->nErasedBlocks
, maxTries
, block
));
3178 } while ((dev
->nErasedBlocks
< dev
->nReservedBlocks
) && (block
> 0)
3181 return aggressive
? gcOk
: YAFFS_OK
;
3184 /*------------------------- TAGS --------------------------------*/
3186 static int yaffs_TagsMatch(const yaffs_ExtendedTags
* tags
, int objectId
,
3189 return (tags
->chunkId
== chunkInObject
&&
3190 tags
->objectId
== objectId
&& !tags
->chunkDeleted
) ? 1 : 0;
3195 /*-------------------- Data file manipulation -----------------*/
3197 static int yaffs_FindChunkInFile(yaffs_Object
* in
, int chunkInInode
,
3198 yaffs_ExtendedTags
* tags
)
3200 /*Get the Tnode, then get the level 0 offset chunk offset */
3203 yaffs_ExtendedTags localTags
;
3206 yaffs_Device
*dev
= in
->myDev
;
3209 /* Passed a NULL, so use our own tags space */
3213 tn
= yaffs_FindLevel0Tnode(dev
, &in
->variant
.fileVariant
, chunkInInode
);
3216 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,chunkInInode
);
3219 yaffs_FindChunkInGroup(dev
, theChunk
, tags
, in
->objectId
,
3225 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object
* in
, int chunkInInode
,
3226 yaffs_ExtendedTags
* tags
)
3228 /* Get the Tnode, then get the level 0 offset chunk offset */
3231 yaffs_ExtendedTags localTags
;
3233 yaffs_Device
*dev
= in
->myDev
;
3237 /* Passed a NULL, so use our own tags space */
3241 tn
= yaffs_FindLevel0Tnode(dev
, &in
->variant
.fileVariant
, chunkInInode
);
3245 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,chunkInInode
);
3248 yaffs_FindChunkInGroup(dev
, theChunk
, tags
, in
->objectId
,
3251 /* Delete the entry in the filestructure (if found) */
3253 yaffs_PutLevel0Tnode(dev
,tn
,chunkInInode
,0);
3256 /*T(("No level 0 found for %d\n", chunkInInode)); */
3260 /* T(("Could not find %d to delete\n",chunkInInode)); */
3265 #ifdef YAFFS_PARANOID
3267 static int yaffs_CheckFileSanity(yaffs_Object
* in
)
3275 yaffs_Tags localTags
;
3276 yaffs_Tags
*tags
= &localTags
;
3280 if (in
->variantType
!= YAFFS_OBJECT_TYPE_FILE
) {
3281 /* T(("Object not a file\n")); */
3285 objId
= in
->objectId
;
3286 fSize
= in
->variant
.fileVariant
.fileSize
;
3288 (fSize
+ in
->myDev
->nDataBytesPerChunk
- 1) / in
->myDev
->nDataBytesPerChunk
;
3290 for (chunk
= 1; chunk
<= nChunks
; chunk
++) {
3291 tn
= yaffs_FindLevel0Tnode(in
->myDev
, &in
->variant
.fileVariant
,
3296 theChunk
= yaffs_GetChunkGroupBase(dev
,tn
,chunk
);
3298 if (yaffs_CheckChunkBits
3299 (dev
, theChunk
/ dev
->nChunksPerBlock
,
3300 theChunk
% dev
->nChunksPerBlock
)) {
3302 yaffs_ReadChunkTagsFromNAND(in
->myDev
, theChunk
,
3306 (tags
, in
->objectId
, chunk
, chunkDeleted
)) {
3316 /* T(("No level 0 found for %d\n", chunk)); */
3320 return failed
? YAFFS_FAIL
: YAFFS_OK
;
3325 static int yaffs_PutChunkIntoFile(yaffs_Object
* in
, int chunkInInode
,
3326 int chunkInNAND
, int inScan
)
3328 /* NB inScan is zero unless scanning.
3329 * For forward scanning, inScan is > 0;
3330 * for backward scanning inScan is < 0
3334 yaffs_Device
*dev
= in
->myDev
;
3336 yaffs_ExtendedTags existingTags
;
3337 yaffs_ExtendedTags newTags
;
3338 unsigned existingSerial
, newSerial
;
3340 if (in
->variantType
!= YAFFS_OBJECT_TYPE_FILE
) {
3341 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3342 * If it is not during Scanning then something went wrong!
3345 T(YAFFS_TRACE_ERROR
,
3347 ("yaffs tragedy:attempt to put data chunk into a non-file"
3352 yaffs_DeleteChunk(dev
, chunkInNAND
, 1, __LINE__
);
3356 tn
= yaffs_AddOrFindLevel0Tnode(dev
,
3357 &in
->variant
.fileVariant
,
3364 existingChunk
= yaffs_GetChunkGroupBase(dev
,tn
,chunkInInode
);
3367 /* If we're scanning then we need to test for duplicates
3368 * NB This does not need to be efficient since it should only ever
3369 * happen when the power fails during a write, then only one
3370 * chunk should ever be affected.
3372 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3373 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3376 if (existingChunk
!= 0) {
3377 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3378 * thus we have to do a FindChunkInFile to get the real chunk id.
3380 * We have a duplicate now we need to decide which one to use:
3382 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3383 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3384 * YAFFS1: Get both sets of tags and compare serial numbers.
3388 /* Only do this for forward scanning */
3389 yaffs_ReadChunkWithTagsFromNAND(dev
,
3393 /* Do a proper find */
3395 yaffs_FindChunkInFile(in
, chunkInInode
,
3399 if (existingChunk
<= 0) {
3400 /*Hoosterman - how did this happen? */
3402 T(YAFFS_TRACE_ERROR
,
3404 ("yaffs tragedy: existing chunk < 0 in scan"
3409 /* NB The deleted flags should be false, otherwise the chunks will
3410 * not be loaded during a scan
3413 newSerial
= newTags
.serialNumber
;
3414 existingSerial
= existingTags
.serialNumber
;
3417 (in
->myDev
->isYaffs2
||
3418 existingChunk
<= 0 ||
3419 ((existingSerial
+ 1) & 3) == newSerial
)) {
3420 /* Forward scanning.
3422 * Delete the old one and drop through to update the tnode
3424 yaffs_DeleteChunk(dev
, existingChunk
, 1,
3427 /* Backward scanning or we want to use the existing one
3429 * Delete the new one and return early so that the tnode isn't changed
3431 yaffs_DeleteChunk(dev
, chunkInNAND
, 1,
3439 if (existingChunk
== 0) {
3443 yaffs_PutLevel0Tnode(dev
,tn
,chunkInInode
,chunkInNAND
);
3448 static int yaffs_ReadChunkDataFromObject(yaffs_Object
* in
, int chunkInInode
,
3451 int chunkInNAND
= yaffs_FindChunkInFile(in
, chunkInInode
, NULL
);
3453 if (chunkInNAND
>= 0) {
3454 return yaffs_ReadChunkWithTagsFromNAND(in
->myDev
, chunkInNAND
,
3457 T(YAFFS_TRACE_NANDACCESS
,
3458 (TSTR("Chunk %d not found zero instead" TENDSTR
),
3460 /* get sane (zero) data if you read a hole */
3461 memset(buffer
, 0, in
->myDev
->nDataBytesPerChunk
);
3467 void yaffs_DeleteChunk(yaffs_Device
* dev
, int chunkId
, int markNAND
, int lyn
)
3471 yaffs_ExtendedTags tags
;
3472 yaffs_BlockInfo
*bi
;
3479 block
= chunkId
/ dev
->nChunksPerBlock
;
3480 page
= chunkId
% dev
->nChunksPerBlock
;
3483 if(!yaffs_CheckChunkBit(dev
,block
,page
))
3484 T(YAFFS_TRACE_VERIFY
,
3485 (TSTR("Deleting invalid chunk %d"TENDSTR
),
3488 bi
= yaffs_GetBlockInfo(dev
, block
);
3490 T(YAFFS_TRACE_DELETION
,
3491 (TSTR("line %d delete of chunk %d" TENDSTR
), lyn
, chunkId
));
3494 bi
->blockState
!= YAFFS_BLOCK_STATE_COLLECTING
&& !dev
->isYaffs2
) {
3496 yaffs_InitialiseTags(&tags
);
3498 tags
.chunkDeleted
= 1;
3500 yaffs_WriteChunkWithTagsToNAND(dev
, chunkId
, NULL
, &tags
);
3501 yaffs_HandleUpdateChunk(dev
, chunkId
, &tags
);
3503 dev
->nUnmarkedDeletions
++;
3506 /* Pull out of the management area.
3507 * If the whole block became dirty, this will kick off an erasure.
3509 if (bi
->blockState
== YAFFS_BLOCK_STATE_ALLOCATING
||
3510 bi
->blockState
== YAFFS_BLOCK_STATE_FULL
||
3511 bi
->blockState
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
||
3512 bi
->blockState
== YAFFS_BLOCK_STATE_COLLECTING
) {
3515 yaffs_ClearChunkBit(dev
, block
, page
);
3519 if (bi
->pagesInUse
== 0 &&
3520 !bi
->hasShrinkHeader
&&
3521 bi
->blockState
!= YAFFS_BLOCK_STATE_ALLOCATING
&&
3522 bi
->blockState
!= YAFFS_BLOCK_STATE_NEEDS_SCANNING
) {
3523 yaffs_BlockBecameDirty(dev
, block
);
3527 /* T(("Bad news deleting chunk %d\n",chunkId)); */
3532 static int yaffs_WriteChunkDataToObject(yaffs_Object
* in
, int chunkInInode
,
3533 const __u8
* buffer
, int nBytes
,
3536 /* Find old chunk Need to do this to get serial number
3537 * Write new one and patch into tree.
3538 * Invalidate old tags.
3542 yaffs_ExtendedTags prevTags
;
3545 yaffs_ExtendedTags newTags
;
3547 yaffs_Device
*dev
= in
->myDev
;
3549 yaffs_CheckGarbageCollection(dev
);
3551 /* Get the previous chunk at this location in the file if it exists */
3552 prevChunkId
= yaffs_FindChunkInFile(in
, chunkInInode
, &prevTags
);
3554 /* Set up new tags */
3555 yaffs_InitialiseTags(&newTags
);
3557 newTags
.chunkId
= chunkInInode
;
3558 newTags
.objectId
= in
->objectId
;
3559 newTags
.serialNumber
=
3560 (prevChunkId
>= 0) ? prevTags
.serialNumber
+ 1 : 1;
3561 newTags
.byteCount
= nBytes
;
3564 yaffs_WriteNewChunkWithTagsToNAND(dev
, buffer
, &newTags
,
3567 if (newChunkId
>= 0) {
3568 yaffs_PutChunkIntoFile(in
, chunkInInode
, newChunkId
, 0);
3570 if (prevChunkId
>= 0) {
3571 yaffs_DeleteChunk(dev
, prevChunkId
, 1, __LINE__
);
3575 yaffs_CheckFileSanity(in
);
3581 /* UpdateObjectHeader updates the header on NAND for an object.
3582 * If name is not NULL, then that new name is used.
3584 int yaffs_UpdateObjectHeader(yaffs_Object
* in
, const YCHAR
* name
, int force
,
3585 int isShrink
, int shadows
)
3588 yaffs_BlockInfo
*bi
;
3590 yaffs_Device
*dev
= in
->myDev
;
3597 yaffs_ExtendedTags newTags
;
3598 yaffs_ExtendedTags oldTags
;
3600 __u8
*buffer
= NULL
;
3601 YCHAR oldName
[YAFFS_MAX_NAME_LENGTH
+ 1];
3603 yaffs_ObjectHeader
*oh
= NULL
;
3605 yaffs_strcpy(oldName
,"silly old name");
3607 if (!in
->fake
|| force
) {
3609 yaffs_CheckGarbageCollection(dev
);
3610 yaffs_CheckObjectDetailsLoaded(in
);
3612 buffer
= yaffs_GetTempBuffer(in
->myDev
, __LINE__
);
3613 oh
= (yaffs_ObjectHeader
*) buffer
;
3615 prevChunkId
= in
->chunkId
;
3617 if (prevChunkId
>= 0) {
3618 result
= yaffs_ReadChunkWithTagsFromNAND(dev
, prevChunkId
,
3621 yaffs_VerifyObjectHeader(in
,oh
,&oldTags
,0);
3623 memcpy(oldName
, oh
->name
, sizeof(oh
->name
));
3626 memset(buffer
, 0xFF, dev
->nDataBytesPerChunk
);
3628 oh
->type
= in
->variantType
;
3629 oh
->yst_mode
= in
->yst_mode
;
3630 oh
->shadowsObject
= shadows
;
3632 #ifdef CONFIG_YAFFS_WINCE
3633 oh
->win_atime
[0] = in
->win_atime
[0];
3634 oh
->win_ctime
[0] = in
->win_ctime
[0];
3635 oh
->win_mtime
[0] = in
->win_mtime
[0];
3636 oh
->win_atime
[1] = in
->win_atime
[1];
3637 oh
->win_ctime
[1] = in
->win_ctime
[1];
3638 oh
->win_mtime
[1] = in
->win_mtime
[1];
3640 oh
->yst_uid
= in
->yst_uid
;
3641 oh
->yst_gid
= in
->yst_gid
;
3642 oh
->yst_atime
= in
->yst_atime
;
3643 oh
->yst_mtime
= in
->yst_mtime
;
3644 oh
->yst_ctime
= in
->yst_ctime
;
3645 oh
->yst_rdev
= in
->yst_rdev
;
3648 oh
->parentObjectId
= in
->parent
->objectId
;
3650 oh
->parentObjectId
= 0;
3653 if (name
&& *name
) {
3654 memset(oh
->name
, 0, sizeof(oh
->name
));
3655 yaffs_strncpy(oh
->name
, name
, YAFFS_MAX_NAME_LENGTH
);
3656 } else if (prevChunkId
>=0) {
3657 memcpy(oh
->name
, oldName
, sizeof(oh
->name
));
3659 memset(oh
->name
, 0, sizeof(oh
->name
));
3662 oh
->isShrink
= isShrink
;
3664 switch (in
->variantType
) {
3665 case YAFFS_OBJECT_TYPE_UNKNOWN
:
3666 /* Should not happen */
3668 case YAFFS_OBJECT_TYPE_FILE
:
3670 (oh
->parentObjectId
== YAFFS_OBJECTID_DELETED
3671 || oh
->parentObjectId
==
3672 YAFFS_OBJECTID_UNLINKED
) ? 0 : in
->variant
.
3673 fileVariant
.fileSize
;
3675 case YAFFS_OBJECT_TYPE_HARDLINK
:
3676 oh
->equivalentObjectId
=
3677 in
->variant
.hardLinkVariant
.equivalentObjectId
;
3679 case YAFFS_OBJECT_TYPE_SPECIAL
:
3682 case YAFFS_OBJECT_TYPE_DIRECTORY
:
3685 case YAFFS_OBJECT_TYPE_SYMLINK
:
3686 yaffs_strncpy(oh
->alias
,
3687 in
->variant
.symLinkVariant
.alias
,
3688 YAFFS_MAX_ALIAS_LENGTH
);
3689 oh
->alias
[YAFFS_MAX_ALIAS_LENGTH
] = 0;
3694 yaffs_InitialiseTags(&newTags
);
3696 newTags
.chunkId
= 0;
3697 newTags
.objectId
= in
->objectId
;
3698 newTags
.serialNumber
= in
->serial
;
3700 /* Add extra info for file header */
3702 newTags
.extraHeaderInfoAvailable
= 1;
3703 newTags
.extraParentObjectId
= oh
->parentObjectId
;
3704 newTags
.extraFileLength
= oh
->fileSize
;
3705 newTags
.extraIsShrinkHeader
= oh
->isShrink
;
3706 newTags
.extraEquivalentObjectId
= oh
->equivalentObjectId
;
3707 newTags
.extraShadows
= (oh
->shadowsObject
> 0) ? 1 : 0;
3708 newTags
.extraObjectType
= in
->variantType
;
3710 yaffs_VerifyObjectHeader(in
,oh
,&newTags
,1);
3712 /* Create new chunk in NAND */
3714 yaffs_WriteNewChunkWithTagsToNAND(dev
, buffer
, &newTags
,
3715 (prevChunkId
>= 0) ? 1 : 0);
3717 if (newChunkId
>= 0) {
3719 in
->chunkId
= newChunkId
;
3721 if (prevChunkId
>= 0) {
3722 yaffs_DeleteChunk(dev
, prevChunkId
, 1,
3726 if(!yaffs_ObjectHasCachedWriteData(in
))
3729 /* If this was a shrink, then mark the block that the chunk lives on */
3731 bi
= yaffs_GetBlockInfo(in
->myDev
,
3732 newChunkId
/in
->myDev
-> nChunksPerBlock
);
3733 bi
->hasShrinkHeader
= 1;
3738 retVal
= newChunkId
;
3743 yaffs_ReleaseTempBuffer(dev
, buffer
, __LINE__
);
3748 /*------------------------ Short Operations Cache ----------------------------------------
3749 * In many situations where there is no high level buffering (eg WinCE) a lot of
3750 * reads might be short sequential reads, and a lot of writes may be short
3751 * sequential writes. eg. scanning/writing a jpeg file.
3752 * In these cases, a short read/write cache can provide a huge perfomance benefit
3753 * with dumb-as-a-rock code.
3754 * In Linux, the page cache provides read buffering aand the short op cache provides write
3757 * There are a limited number (~10) of cache chunks per device so that we don't
3758 * need a very intelligent search.
3761 static int yaffs_ObjectHasCachedWriteData(yaffs_Object
*obj
)
3763 yaffs_Device
*dev
= obj
->myDev
;
3765 yaffs_ChunkCache
*cache
;
3766 int nCaches
= obj
->myDev
->nShortOpCaches
;
3768 for(i
= 0; i
< nCaches
; i
++){
3769 cache
= &dev
->srCache
[i
];
3770 if (cache
->object
== obj
&&
3779 static void yaffs_FlushFilesChunkCache(yaffs_Object
* obj
)
3781 yaffs_Device
*dev
= obj
->myDev
;
3782 int lowest
= -99; /* Stop compiler whining. */
3784 yaffs_ChunkCache
*cache
;
3785 int chunkWritten
= 0;
3786 int nCaches
= obj
->myDev
->nShortOpCaches
;
3792 /* Find the dirty cache for this object with the lowest chunk id. */
3793 for (i
= 0; i
< nCaches
; i
++) {
3794 if (dev
->srCache
[i
].object
== obj
&&
3795 dev
->srCache
[i
].dirty
) {
3797 || dev
->srCache
[i
].chunkId
<
3799 cache
= &dev
->srCache
[i
];
3800 lowest
= cache
->chunkId
;
3805 if (cache
&& !cache
->locked
) {
3806 /* Write it out and free it up */
3809 yaffs_WriteChunkDataToObject(cache
->object
,
3815 cache
->object
= NULL
;
3818 } while (cache
&& chunkWritten
> 0);
3821 /* Hoosterman, disk full while writing cache out. */
3822 T(YAFFS_TRACE_ERROR
,
3823 (TSTR("yaffs tragedy: no space during cache write" TENDSTR
)));
3830 /*yaffs_FlushEntireDeviceCache(dev)
3835 void yaffs_FlushEntireDeviceCache(yaffs_Device
*dev
)
3838 int nCaches
= dev
->nShortOpCaches
;
3841 /* Find a dirty object in the cache and flush it...
3842 * until there are no further dirty objects.
3846 for( i
= 0; i
< nCaches
&& !obj
; i
++) {
3847 if (dev
->srCache
[i
].object
&&
3848 dev
->srCache
[i
].dirty
)
3849 obj
= dev
->srCache
[i
].object
;
3853 yaffs_FlushFilesChunkCache(obj
);
3860 /* Grab us a cache chunk for use.
3861 * First look for an empty one.
3862 * Then look for the least recently used non-dirty one.
3863 * Then look for the least recently used dirty one...., flush and look again.
3865 static yaffs_ChunkCache
*yaffs_GrabChunkCacheWorker(yaffs_Device
* dev
)
3871 if (dev
->nShortOpCaches
> 0) {
3872 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
3873 if (!dev
->srCache
[i
].object
)
3874 return &dev
->srCache
[i
];
3880 usage
= 0; /* just to stop the compiler grizzling */
3882 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
3883 if (!dev
->srCache
[i
].dirty
&&
3884 ((dev
->srCache
[i
].lastUse
< usage
&& theOne
>= 0) ||
3886 usage
= dev
->srCache
[i
].lastUse
;
3892 return theOne
>= 0 ? &dev
->srCache
[theOne
] : NULL
;
3899 static yaffs_ChunkCache
*yaffs_GrabChunkCache(yaffs_Device
* dev
)
3901 yaffs_ChunkCache
*cache
;
3902 yaffs_Object
*theObj
;
3907 if (dev
->nShortOpCaches
> 0) {
3908 /* Try find a non-dirty one... */
3910 cache
= yaffs_GrabChunkCacheWorker(dev
);
3913 /* They were all dirty, find the last recently used object and flush
3914 * its cache, then find again.
3915 * NB what's here is not very accurate, we actually flush the object
3916 * the last recently used page.
3919 /* With locking we can't assume we can use entry zero */
3926 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
3927 if (dev
->srCache
[i
].object
&&
3928 !dev
->srCache
[i
].locked
&&
3929 (dev
->srCache
[i
].lastUse
< usage
|| !cache
))
3931 usage
= dev
->srCache
[i
].lastUse
;
3932 theObj
= dev
->srCache
[i
].object
;
3933 cache
= &dev
->srCache
[i
];
3938 if (!cache
|| cache
->dirty
) {
3939 /* Flush and try again */
3940 yaffs_FlushFilesChunkCache(theObj
);
3941 cache
= yaffs_GrabChunkCacheWorker(dev
);
3951 /* Find a cached chunk */
3952 static yaffs_ChunkCache
*yaffs_FindChunkCache(const yaffs_Object
* obj
,
3955 yaffs_Device
*dev
= obj
->myDev
;
3957 if (dev
->nShortOpCaches
> 0) {
3958 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
3959 if (dev
->srCache
[i
].object
== obj
&&
3960 dev
->srCache
[i
].chunkId
== chunkId
) {
3963 return &dev
->srCache
[i
];
3970 /* Mark the chunk for the least recently used algorithym */
3971 static void yaffs_UseChunkCache(yaffs_Device
* dev
, yaffs_ChunkCache
* cache
,
3975 if (dev
->nShortOpCaches
> 0) {
3976 if (dev
->srLastUse
< 0 || dev
->srLastUse
> 100000000) {
3977 /* Reset the cache usages */
3979 for (i
= 1; i
< dev
->nShortOpCaches
; i
++) {
3980 dev
->srCache
[i
].lastUse
= 0;
3987 cache
->lastUse
= dev
->srLastUse
;
3995 /* Invalidate a single cache page.
3996 * Do this when a whole page gets written,
3997 * ie the short cache for this page is no longer valid.
3999 static void yaffs_InvalidateChunkCache(yaffs_Object
* object
, int chunkId
)
4001 if (object
->myDev
->nShortOpCaches
> 0) {
4002 yaffs_ChunkCache
*cache
= yaffs_FindChunkCache(object
, chunkId
);
4005 cache
->object
= NULL
;
4010 /* Invalidate all the cache pages associated with this object
4011 * Do this whenever ther file is deleted or resized.
4013 static void yaffs_InvalidateWholeChunkCache(yaffs_Object
* in
)
4016 yaffs_Device
*dev
= in
->myDev
;
4018 if (dev
->nShortOpCaches
> 0) {
4019 /* Invalidate it. */
4020 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
4021 if (dev
->srCache
[i
].object
== in
) {
4022 dev
->srCache
[i
].object
= NULL
;
4028 /*--------------------- Checkpointing --------------------*/
4031 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device
*dev
,int head
)
4033 yaffs_CheckpointValidity cp
;
4035 memset(&cp
,0,sizeof(cp
));
4037 cp
.structType
= sizeof(cp
);
4038 cp
.magic
= YAFFS_MAGIC
;
4039 cp
.version
= YAFFS_CHECKPOINT_VERSION
;
4040 cp
.head
= (head
) ? 1 : 0;
4042 return (yaffs_CheckpointWrite(dev
,&cp
,sizeof(cp
)) == sizeof(cp
))?
4046 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device
*dev
, int head
)
4048 yaffs_CheckpointValidity cp
;
4051 ok
= (yaffs_CheckpointRead(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4054 ok
= (cp
.structType
== sizeof(cp
)) &&
4055 (cp
.magic
== YAFFS_MAGIC
) &&
4056 (cp
.version
== YAFFS_CHECKPOINT_VERSION
) &&
4057 (cp
.head
== ((head
) ? 1 : 0));
4061 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice
*cp
,
4064 cp
->nErasedBlocks
= dev
->nErasedBlocks
;
4065 cp
->allocationBlock
= dev
->allocationBlock
;
4066 cp
->allocationPage
= dev
->allocationPage
;
4067 cp
->nFreeChunks
= dev
->nFreeChunks
;
4069 cp
->nDeletedFiles
= dev
->nDeletedFiles
;
4070 cp
->nUnlinkedFiles
= dev
->nUnlinkedFiles
;
4071 cp
->nBackgroundDeletions
= dev
->nBackgroundDeletions
;
4072 cp
->sequenceNumber
= dev
->sequenceNumber
;
4073 cp
->oldestDirtySequence
= dev
->oldestDirtySequence
;
4077 static void yaffs_CheckpointDeviceToDevice(yaffs_Device
*dev
,
4078 yaffs_CheckpointDevice
*cp
)
4080 dev
->nErasedBlocks
= cp
->nErasedBlocks
;
4081 dev
->allocationBlock
= cp
->allocationBlock
;
4082 dev
->allocationPage
= cp
->allocationPage
;
4083 dev
->nFreeChunks
= cp
->nFreeChunks
;
4085 dev
->nDeletedFiles
= cp
->nDeletedFiles
;
4086 dev
->nUnlinkedFiles
= cp
->nUnlinkedFiles
;
4087 dev
->nBackgroundDeletions
= cp
->nBackgroundDeletions
;
4088 dev
->sequenceNumber
= cp
->sequenceNumber
;
4089 dev
->oldestDirtySequence
= cp
->oldestDirtySequence
;
4093 static int yaffs_WriteCheckpointDevice(yaffs_Device
*dev
)
4095 yaffs_CheckpointDevice cp
;
4097 __u32 nBlocks
= (dev
->internalEndBlock
- dev
->internalStartBlock
+ 1);
4101 /* Write device runtime values*/
4102 yaffs_DeviceToCheckpointDevice(&cp
,dev
);
4103 cp
.structType
= sizeof(cp
);
4105 ok
= (yaffs_CheckpointWrite(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4107 /* Write block info */
4109 nBytes
= nBlocks
* sizeof(yaffs_BlockInfo
);
4110 ok
= (yaffs_CheckpointWrite(dev
,dev
->blockInfo
,nBytes
) == nBytes
);
4113 /* Write chunk bits */
4115 nBytes
= nBlocks
* dev
->chunkBitmapStride
;
4116 ok
= (yaffs_CheckpointWrite(dev
,dev
->chunkBits
,nBytes
) == nBytes
);
4122 static int yaffs_ReadCheckpointDevice(yaffs_Device
*dev
)
4124 yaffs_CheckpointDevice cp
;
4126 __u32 nBlocks
= (dev
->internalEndBlock
- dev
->internalStartBlock
+ 1);
4130 ok
= (yaffs_CheckpointRead(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4134 if(cp
.structType
!= sizeof(cp
))
4138 yaffs_CheckpointDeviceToDevice(dev
,&cp
);
4140 nBytes
= nBlocks
* sizeof(yaffs_BlockInfo
);
4142 ok
= (yaffs_CheckpointRead(dev
,dev
->blockInfo
,nBytes
) == nBytes
);
4146 nBytes
= nBlocks
* dev
->chunkBitmapStride
;
4148 ok
= (yaffs_CheckpointRead(dev
,dev
->chunkBits
,nBytes
) == nBytes
);
4153 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject
*cp
,
4157 cp
->objectId
= obj
->objectId
;
4158 cp
->parentId
= (obj
->parent
) ? obj
->parent
->objectId
: 0;
4159 cp
->chunkId
= obj
->chunkId
;
4160 cp
->variantType
= obj
->variantType
;
4161 cp
->deleted
= obj
->deleted
;
4162 cp
->softDeleted
= obj
->softDeleted
;
4163 cp
->unlinked
= obj
->unlinked
;
4164 cp
->fake
= obj
->fake
;
4165 cp
->renameAllowed
= obj
->renameAllowed
;
4166 cp
->unlinkAllowed
= obj
->unlinkAllowed
;
4167 cp
->serial
= obj
->serial
;
4168 cp
->nDataChunks
= obj
->nDataChunks
;
4170 if(obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
)
4171 cp
->fileSizeOrEquivalentObjectId
= obj
->variant
.fileVariant
.fileSize
;
4172 else if(obj
->variantType
== YAFFS_OBJECT_TYPE_HARDLINK
)
4173 cp
->fileSizeOrEquivalentObjectId
= obj
->variant
.hardLinkVariant
.equivalentObjectId
;
4176 static void yaffs_CheckpointObjectToObject( yaffs_Object
*obj
,yaffs_CheckpointObject
*cp
)
4179 yaffs_Object
*parent
;
4181 obj
->objectId
= cp
->objectId
;
4184 parent
= yaffs_FindOrCreateObjectByNumber(
4187 YAFFS_OBJECT_TYPE_DIRECTORY
);
4192 yaffs_AddObjectToDirectory(parent
, obj
);
4194 obj
->chunkId
= cp
->chunkId
;
4195 obj
->variantType
= cp
->variantType
;
4196 obj
->deleted
= cp
->deleted
;
4197 obj
->softDeleted
= cp
->softDeleted
;
4198 obj
->unlinked
= cp
->unlinked
;
4199 obj
->fake
= cp
->fake
;
4200 obj
->renameAllowed
= cp
->renameAllowed
;
4201 obj
->unlinkAllowed
= cp
->unlinkAllowed
;
4202 obj
->serial
= cp
->serial
;
4203 obj
->nDataChunks
= cp
->nDataChunks
;
4205 if(obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
)
4206 obj
->variant
.fileVariant
.fileSize
= cp
->fileSizeOrEquivalentObjectId
;
4207 else if(obj
->variantType
== YAFFS_OBJECT_TYPE_HARDLINK
)
4208 obj
->variant
.hardLinkVariant
.equivalentObjectId
= cp
->fileSizeOrEquivalentObjectId
;
4210 if(obj
->objectId
>= YAFFS_NOBJECT_BUCKETS
)
4211 obj
->lazyLoaded
= 1;
4216 static int yaffs_CheckpointTnodeWorker(yaffs_Object
* in
, yaffs_Tnode
* tn
,
4217 __u32 level
, int chunkOffset
)
4220 yaffs_Device
*dev
= in
->myDev
;
4222 int nTnodeBytes
= (dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8;
4227 for (i
= 0; i
< YAFFS_NTNODES_INTERNAL
&& ok
; i
++){
4228 if (tn
->internal
[i
]) {
4229 ok
= yaffs_CheckpointTnodeWorker(in
,
4232 (chunkOffset
<<YAFFS_TNODES_INTERNAL_BITS
) + i
);
4235 } else if (level
== 0) {
4236 __u32 baseOffset
= chunkOffset
<< YAFFS_TNODES_LEVEL0_BITS
;
4237 /* printf("write tnode at %d\n",baseOffset); */
4238 ok
= (yaffs_CheckpointWrite(dev
,&baseOffset
,sizeof(baseOffset
)) == sizeof(baseOffset
));
4240 ok
= (yaffs_CheckpointWrite(dev
,tn
,nTnodeBytes
) == nTnodeBytes
);
4248 static int yaffs_WriteCheckpointTnodes(yaffs_Object
*obj
)
4250 __u32 endMarker
= ~0;
4253 if(obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
){
4254 ok
= yaffs_CheckpointTnodeWorker(obj
,
4255 obj
->variant
.fileVariant
.top
,
4256 obj
->variant
.fileVariant
.topLevel
,
4259 ok
= (yaffs_CheckpointWrite(obj
->myDev
,&endMarker
,sizeof(endMarker
)) ==
4266 static int yaffs_ReadCheckpointTnodes(yaffs_Object
*obj
)
4270 yaffs_Device
*dev
= obj
->myDev
;
4271 yaffs_FileStructure
*fileStructPtr
= &obj
->variant
.fileVariant
;
4275 ok
= (yaffs_CheckpointRead(dev
,&baseChunk
,sizeof(baseChunk
)) == sizeof(baseChunk
));
4277 while(ok
&& (~baseChunk
)){
4279 /* Read level 0 tnode */
4282 /* printf("read tnode at %d\n",baseChunk); */
4283 tn
= yaffs_GetTnodeRaw(dev
);
4285 ok
= (yaffs_CheckpointRead(dev
,tn
,(dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8) ==
4286 (dev
->tnodeWidth
* YAFFS_NTNODES_LEVEL0
)/8);
4291 ok
= yaffs_AddOrFindLevel0Tnode(dev
,
4299 ok
= (yaffs_CheckpointRead(dev
,&baseChunk
,sizeof(baseChunk
)) == sizeof(baseChunk
));
4303 T(YAFFS_TRACE_CHECKPOINT
,(
4304 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR
),
4305 nread
,baseChunk
,ok
));
4311 static int yaffs_WriteCheckpointObjects(yaffs_Device
*dev
)
4314 yaffs_CheckpointObject cp
;
4317 struct list_head
*lh
;
4320 /* Iterate through the objects in each hash entry,
4321 * dumping them to the checkpointing stream.
4324 for(i
= 0; ok
&& i
< YAFFS_NOBJECT_BUCKETS
; i
++){
4325 list_for_each(lh
, &dev
->objectBucket
[i
].list
) {
4327 obj
= list_entry(lh
, yaffs_Object
, hashLink
);
4328 if (!obj
->deferedFree
) {
4329 yaffs_ObjectToCheckpointObject(&cp
,obj
);
4330 cp
.structType
= sizeof(cp
);
4332 T(YAFFS_TRACE_CHECKPOINT
,(
4333 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR
),
4334 cp
.objectId
,cp
.parentId
,cp
.variantType
,cp
.chunkId
,(unsigned) obj
));
4336 ok
= (yaffs_CheckpointWrite(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4338 if(ok
&& obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
){
4339 ok
= yaffs_WriteCheckpointTnodes(obj
);
4346 /* Dump end of list */
4347 memset(&cp
,0xFF,sizeof(yaffs_CheckpointObject
));
4348 cp
.structType
= sizeof(cp
);
4351 ok
= (yaffs_CheckpointWrite(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4356 static int yaffs_ReadCheckpointObjects(yaffs_Device
*dev
)
4359 yaffs_CheckpointObject cp
;
4362 yaffs_Object
*hardList
= NULL
;
4364 while(ok
&& !done
) {
4365 ok
= (yaffs_CheckpointRead(dev
,&cp
,sizeof(cp
)) == sizeof(cp
));
4366 if(cp
.structType
!= sizeof(cp
)) {
4367 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("struct size %d instead of %d ok %d"TENDSTR
),
4368 cp
.structType
,sizeof(cp
),ok
));
4372 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR
),
4373 cp
.objectId
,cp
.parentId
,cp
.variantType
,cp
.chunkId
));
4375 if(ok
&& cp
.objectId
== ~0)
4378 obj
= yaffs_FindOrCreateObjectByNumber(dev
,cp
.objectId
, cp
.variantType
);
4380 yaffs_CheckpointObjectToObject(obj
,&cp
);
4381 if(obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
) {
4382 ok
= yaffs_ReadCheckpointTnodes(obj
);
4383 } else if(obj
->variantType
== YAFFS_OBJECT_TYPE_HARDLINK
) {
4384 obj
->hardLinks
.next
=
4385 (struct list_head
*)
4395 yaffs_HardlinkFixup(dev
,hardList
);
4400 static int yaffs_WriteCheckpointSum(yaffs_Device
*dev
)
4402 __u32 checkpointSum
;
4405 yaffs_GetCheckpointSum(dev
,&checkpointSum
);
4407 ok
= (yaffs_CheckpointWrite(dev
,&checkpointSum
,sizeof(checkpointSum
)) == sizeof(checkpointSum
));
4415 static int yaffs_ReadCheckpointSum(yaffs_Device
*dev
)
4417 __u32 checkpointSum0
;
4418 __u32 checkpointSum1
;
4421 yaffs_GetCheckpointSum(dev
,&checkpointSum0
);
4423 ok
= (yaffs_CheckpointRead(dev
,&checkpointSum1
,sizeof(checkpointSum1
)) == sizeof(checkpointSum1
));
4428 if(checkpointSum0
!= checkpointSum1
)
4435 static int yaffs_WriteCheckpointData(yaffs_Device
*dev
)
4440 if(dev
->skipCheckpointWrite
|| !dev
->isYaffs2
){
4441 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("skipping checkpoint write" TENDSTR
)));
4446 ok
= yaffs_CheckpointOpen(dev
,1);
4449 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("write checkpoint validity" TENDSTR
)));
4450 ok
= yaffs_WriteCheckpointValidityMarker(dev
,1);
4453 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("write checkpoint device" TENDSTR
)));
4454 ok
= yaffs_WriteCheckpointDevice(dev
);
4457 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("write checkpoint objects" TENDSTR
)));
4458 ok
= yaffs_WriteCheckpointObjects(dev
);
4461 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("write checkpoint validity" TENDSTR
)));
4462 ok
= yaffs_WriteCheckpointValidityMarker(dev
,0);
4466 ok
= yaffs_WriteCheckpointSum(dev
);
4470 if(!yaffs_CheckpointClose(dev
))
4474 dev
->isCheckpointed
= 1;
4476 dev
->isCheckpointed
= 0;
4478 return dev
->isCheckpointed
;
4481 static int yaffs_ReadCheckpointData(yaffs_Device
*dev
)
4485 if(dev
->skipCheckpointRead
|| !dev
->isYaffs2
){
4486 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("skipping checkpoint read" TENDSTR
)));
4491 ok
= yaffs_CheckpointOpen(dev
,0); /* open for read */
4494 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("read checkpoint validity" TENDSTR
)));
4495 ok
= yaffs_ReadCheckpointValidityMarker(dev
,1);
4498 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("read checkpoint device" TENDSTR
)));
4499 ok
= yaffs_ReadCheckpointDevice(dev
);
4502 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("read checkpoint objects" TENDSTR
)));
4503 ok
= yaffs_ReadCheckpointObjects(dev
);
4506 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("read checkpoint validity" TENDSTR
)));
4507 ok
= yaffs_ReadCheckpointValidityMarker(dev
,0);
4511 ok
= yaffs_ReadCheckpointSum(dev
);
4512 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("read checkpoint checksum %d" TENDSTR
),ok
));
4515 if(!yaffs_CheckpointClose(dev
))
4519 dev
->isCheckpointed
= 1;
4521 dev
->isCheckpointed
= 0;
4527 static void yaffs_InvalidateCheckpoint(yaffs_Device
*dev
)
4529 if(dev
->isCheckpointed
||
4530 dev
->blocksInCheckpoint
> 0){
4531 dev
->isCheckpointed
= 0;
4532 yaffs_CheckpointInvalidateStream(dev
);
4533 if(dev
->superBlock
&& dev
->markSuperBlockDirty
)
4534 dev
->markSuperBlockDirty(dev
->superBlock
);
4539 int yaffs_CheckpointSave(yaffs_Device
*dev
)
4542 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("save entry: isCheckpointed %d"TENDSTR
),dev
->isCheckpointed
));
4544 yaffs_VerifyObjects(dev
);
4545 yaffs_VerifyBlocks(dev
);
4546 yaffs_VerifyFreeChunks(dev
);
4548 if(!dev
->isCheckpointed
) {
4549 yaffs_InvalidateCheckpoint(dev
);
4550 yaffs_WriteCheckpointData(dev
);
4553 T(YAFFS_TRACE_ALWAYS
,(TSTR("save exit: isCheckpointed %d"TENDSTR
),dev
->isCheckpointed
));
4555 return dev
->isCheckpointed
;
4558 int yaffs_CheckpointRestore(yaffs_Device
*dev
)
4561 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("restore entry: isCheckpointed %d"TENDSTR
),dev
->isCheckpointed
));
4563 retval
= yaffs_ReadCheckpointData(dev
);
4565 if(dev
->isCheckpointed
){
4566 yaffs_VerifyObjects(dev
);
4567 yaffs_VerifyBlocks(dev
);
4568 yaffs_VerifyFreeChunks(dev
);
4571 T(YAFFS_TRACE_CHECKPOINT
,(TSTR("restore exit: isCheckpointed %d"TENDSTR
),dev
->isCheckpointed
));
4576 /*--------------------- File read/write ------------------------
4577 * Read and write have very similar structures.
4578 * In general the read/write has three parts to it
4579 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4580 * Some complete chunks
4581 * An incomplete chunk to end off with
4583 * Curve-balls: the first chunk might also be the last chunk.
4586 int yaffs_ReadDataFromFile(yaffs_Object
* in
, __u8
* buffer
, loff_t offset
,
4595 yaffs_ChunkCache
*cache
;
4602 //chunk = offset / dev->nDataBytesPerChunk + 1;
4603 //start = offset % dev->nDataBytesPerChunk;
4604 yaffs_AddrToChunk(dev
,offset
,&chunk
,&start
);
4607 /* OK now check for the curveball where the start and end are in
4610 if ((start
+ n
) < dev
->nDataBytesPerChunk
) {
4613 nToCopy
= dev
->nDataBytesPerChunk
- start
;
4616 cache
= yaffs_FindChunkCache(in
, chunk
);
4618 /* If the chunk is already in the cache or it is less than a whole chunk
4619 * then use the cache (if there is caching)
4620 * else bypass the cache.
4622 if (cache
|| nToCopy
!= dev
->nDataBytesPerChunk
) {
4623 if (dev
->nShortOpCaches
> 0) {
4625 /* If we can't find the data in the cache, then load it up. */
4628 cache
= yaffs_GrabChunkCache(in
->myDev
);
4630 cache
->chunkId
= chunk
;
4633 yaffs_ReadChunkDataFromObject(in
, chunk
,
4639 yaffs_UseChunkCache(dev
, cache
, 0);
4643 #ifdef CONFIG_YAFFS_WINCE
4644 yfsd_UnlockYAFFS(TRUE
);
4646 memcpy(buffer
, &cache
->data
[start
], nToCopy
);
4648 #ifdef CONFIG_YAFFS_WINCE
4649 yfsd_LockYAFFS(TRUE
);
4653 /* Read into the local buffer then copy..*/
4656 yaffs_GetTempBuffer(dev
, __LINE__
);
4657 yaffs_ReadChunkDataFromObject(in
, chunk
,
4659 #ifdef CONFIG_YAFFS_WINCE
4660 yfsd_UnlockYAFFS(TRUE
);
4662 memcpy(buffer
, &localBuffer
[start
], nToCopy
);
4664 #ifdef CONFIG_YAFFS_WINCE
4665 yfsd_LockYAFFS(TRUE
);
4667 yaffs_ReleaseTempBuffer(dev
, localBuffer
,
4672 #ifdef CONFIG_YAFFS_WINCE
4673 __u8
*localBuffer
= yaffs_GetTempBuffer(dev
, __LINE__
);
4675 /* Under WinCE can't do direct transfer. Need to use a local buffer.
4676 * This is because we otherwise screw up WinCE's memory mapper
4678 yaffs_ReadChunkDataFromObject(in
, chunk
, localBuffer
);
4680 #ifdef CONFIG_YAFFS_WINCE
4681 yfsd_UnlockYAFFS(TRUE
);
4683 memcpy(buffer
, localBuffer
, dev
->nDataBytesPerChunk
);
4685 #ifdef CONFIG_YAFFS_WINCE
4686 yfsd_LockYAFFS(TRUE
);
4687 yaffs_ReleaseTempBuffer(dev
, localBuffer
, __LINE__
);
4691 /* A full chunk. Read directly into the supplied buffer. */
4692 yaffs_ReadChunkDataFromObject(in
, chunk
, buffer
);
4706 int yaffs_WriteDataToFile(yaffs_Object
* in
, const __u8
* buffer
, loff_t offset
,
4707 int nBytes
, int writeThrough
)
4716 int startOfWrite
= offset
;
4717 int chunkWritten
= 0;
4724 while (n
> 0 && chunkWritten
>= 0) {
4725 //chunk = offset / dev->nDataBytesPerChunk + 1;
4726 //start = offset % dev->nDataBytesPerChunk;
4727 yaffs_AddrToChunk(dev
,offset
,&chunk
,&start
);
4730 /* OK now check for the curveball where the start and end are in
4734 if ((start
+ n
) < dev
->nDataBytesPerChunk
) {
4737 /* Now folks, to calculate how many bytes to write back....
4738 * If we're overwriting and not writing to then end of file then
4739 * we need to write back as much as was there before.
4743 in
->variant
.fileVariant
.fileSize
-
4744 ((chunk
- 1) * dev
->nDataBytesPerChunk
);
4746 if (nBytesRead
> dev
->nDataBytesPerChunk
) {
4747 nBytesRead
= dev
->nDataBytesPerChunk
;
4752 (start
+ n
)) ? nBytesRead
: (start
+ n
);
4755 nToCopy
= dev
->nDataBytesPerChunk
- start
;
4756 nToWriteBack
= dev
->nDataBytesPerChunk
;
4759 if (nToCopy
!= dev
->nDataBytesPerChunk
) {
4760 /* An incomplete start or end chunk (or maybe both start and end chunk) */
4761 if (dev
->nShortOpCaches
> 0) {
4762 yaffs_ChunkCache
*cache
;
4763 /* If we can't find the data in the cache, then load the cache */
4764 cache
= yaffs_FindChunkCache(in
, chunk
);
4767 && yaffs_CheckSpaceForAllocation(in
->
4769 cache
= yaffs_GrabChunkCache(in
->myDev
);
4771 cache
->chunkId
= chunk
;
4774 yaffs_ReadChunkDataFromObject(in
, chunk
,
4780 !yaffs_CheckSpaceForAllocation(in
->myDev
)){
4781 /* Drop the cache if it was a read cache item and
4782 * no space check has been made for it.
4788 yaffs_UseChunkCache(dev
, cache
, 1);
4790 #ifdef CONFIG_YAFFS_WINCE
4791 yfsd_UnlockYAFFS(TRUE
);
4794 memcpy(&cache
->data
[start
], buffer
,
4797 #ifdef CONFIG_YAFFS_WINCE
4798 yfsd_LockYAFFS(TRUE
);
4801 cache
->nBytes
= nToWriteBack
;
4805 yaffs_WriteChunkDataToObject
4808 cache
->data
, cache
->nBytes
,
4814 chunkWritten
= -1; /* fail the write */
4817 /* An incomplete start or end chunk (or maybe both start and end chunk)
4818 * Read into the local buffer then copy, then copy over and write back.
4822 yaffs_GetTempBuffer(dev
, __LINE__
);
4824 yaffs_ReadChunkDataFromObject(in
, chunk
,
4827 #ifdef CONFIG_YAFFS_WINCE
4828 yfsd_UnlockYAFFS(TRUE
);
4831 memcpy(&localBuffer
[start
], buffer
, nToCopy
);
4833 #ifdef CONFIG_YAFFS_WINCE
4834 yfsd_LockYAFFS(TRUE
);
4837 yaffs_WriteChunkDataToObject(in
, chunk
,
4842 yaffs_ReleaseTempBuffer(dev
, localBuffer
,
4849 #ifdef CONFIG_YAFFS_WINCE
4850 /* Under WinCE can't do direct transfer. Need to use a local buffer.
4851 * This is because we otherwise screw up WinCE's memory mapper
4853 __u8
*localBuffer
= yaffs_GetTempBuffer(dev
, __LINE__
);
4854 #ifdef CONFIG_YAFFS_WINCE
4855 yfsd_UnlockYAFFS(TRUE
);
4857 memcpy(localBuffer
, buffer
, dev
->nDataBytesPerChunk
);
4858 #ifdef CONFIG_YAFFS_WINCE
4859 yfsd_LockYAFFS(TRUE
);
4862 yaffs_WriteChunkDataToObject(in
, chunk
, localBuffer
,
4863 dev
->nDataBytesPerChunk
,
4865 yaffs_ReleaseTempBuffer(dev
, localBuffer
, __LINE__
);
4867 /* A full chunk. Write directly from the supplied buffer. */
4869 yaffs_WriteChunkDataToObject(in
, chunk
, buffer
,
4870 dev
->nDataBytesPerChunk
,
4873 /* Since we've overwritten the cached data, we better invalidate it. */
4874 yaffs_InvalidateChunkCache(in
, chunk
);
4877 if (chunkWritten
>= 0) {
4886 /* Update file object */
4888 if ((startOfWrite
+ nDone
) > in
->variant
.fileVariant
.fileSize
) {
4889 in
->variant
.fileVariant
.fileSize
= (startOfWrite
+ nDone
);
4898 /* ---------------------- File resizing stuff ------------------ */
4900 static void yaffs_PruneResizedChunks(yaffs_Object
* in
, int newSize
)
4903 yaffs_Device
*dev
= in
->myDev
;
4904 int oldFileSize
= in
->variant
.fileVariant
.fileSize
;
4906 int lastDel
= 1 + (oldFileSize
- 1) / dev
->nDataBytesPerChunk
;
4908 int startDel
= 1 + (newSize
+ dev
->nDataBytesPerChunk
- 1) /
4909 dev
->nDataBytesPerChunk
;
4913 /* Delete backwards so that we don't end up with holes if
4914 * power is lost part-way through the operation.
4916 for (i
= lastDel
; i
>= startDel
; i
--) {
4917 /* NB this could be optimised somewhat,
4918 * eg. could retrieve the tags and write them without
4919 * using yaffs_DeleteChunk
4922 chunkId
= yaffs_FindAndDeleteChunkInFile(in
, i
, NULL
);
4925 (dev
->internalStartBlock
* dev
->nChunksPerBlock
)
4927 ((dev
->internalEndBlock
+
4928 1) * dev
->nChunksPerBlock
)) {
4929 T(YAFFS_TRACE_ALWAYS
,
4930 (TSTR("Found daft chunkId %d for %d" TENDSTR
),
4934 yaffs_DeleteChunk(dev
, chunkId
, 1, __LINE__
);
4941 int yaffs_ResizeFile(yaffs_Object
* in
, loff_t newSize
)
4944 int oldFileSize
= in
->variant
.fileVariant
.fileSize
;
4945 int newSizeOfPartialChunk
;
4948 yaffs_Device
*dev
= in
->myDev
;
4950 yaffs_AddrToChunk(dev
, newSize
, &newFullChunks
, &newSizeOfPartialChunk
);
4952 yaffs_FlushFilesChunkCache(in
);
4953 yaffs_InvalidateWholeChunkCache(in
);
4955 yaffs_CheckGarbageCollection(dev
);
4957 if (in
->variantType
!= YAFFS_OBJECT_TYPE_FILE
) {
4958 return yaffs_GetFileSize(in
);
4961 if (newSize
== oldFileSize
) {
4965 if (newSize
< oldFileSize
) {
4967 yaffs_PruneResizedChunks(in
, newSize
);
4969 if (newSizeOfPartialChunk
!= 0) {
4970 int lastChunk
= 1 + newFullChunks
;
4972 __u8
*localBuffer
= yaffs_GetTempBuffer(dev
, __LINE__
);
4974 /* Got to read and rewrite the last chunk with its new size and zero pad */
4975 yaffs_ReadChunkDataFromObject(in
, lastChunk
,
4978 memset(localBuffer
+ newSizeOfPartialChunk
, 0,
4979 dev
->nDataBytesPerChunk
- newSizeOfPartialChunk
);
4981 yaffs_WriteChunkDataToObject(in
, lastChunk
, localBuffer
,
4982 newSizeOfPartialChunk
, 1);
4984 yaffs_ReleaseTempBuffer(dev
, localBuffer
, __LINE__
);
4987 in
->variant
.fileVariant
.fileSize
= newSize
;
4989 yaffs_PruneFileStructure(dev
, &in
->variant
.fileVariant
);
4991 /* newsSize > oldFileSize */
4992 in
->variant
.fileVariant
.fileSize
= newSize
;
4997 /* Write a new object header.
4998 * show we've shrunk the file, if need be
4999 * Do this only if the file is not in the deleted directories.
5001 if (in
->parent
->objectId
!= YAFFS_OBJECTID_UNLINKED
&&
5002 in
->parent
->objectId
!= YAFFS_OBJECTID_DELETED
) {
5003 yaffs_UpdateObjectHeader(in
, NULL
, 0,
5004 (newSize
< oldFileSize
) ? 1 : 0, 0);
5010 loff_t
yaffs_GetFileSize(yaffs_Object
* obj
)
5012 obj
= yaffs_GetEquivalentObject(obj
);
5014 switch (obj
->variantType
) {
5015 case YAFFS_OBJECT_TYPE_FILE
:
5016 return obj
->variant
.fileVariant
.fileSize
;
5017 case YAFFS_OBJECT_TYPE_SYMLINK
:
5018 return yaffs_strlen(obj
->variant
.symLinkVariant
.alias
);
5026 int yaffs_FlushFile(yaffs_Object
* in
, int updateTime
)
5030 yaffs_FlushFilesChunkCache(in
);
5032 #ifdef CONFIG_YAFFS_WINCE
5033 yfsd_WinFileTimeNow(in
->win_mtime
);
5036 in
->yst_mtime
= Y_CURRENT_TIME
;
5042 (yaffs_UpdateObjectHeader(in
, NULL
, 0, 0, 0) >=
5043 0) ? YAFFS_OK
: YAFFS_FAIL
;
5052 static int yaffs_DoGenericObjectDeletion(yaffs_Object
* in
)
5055 /* First off, invalidate the file's data in the cache, without flushing. */
5056 yaffs_InvalidateWholeChunkCache(in
);
5058 if (in
->myDev
->isYaffs2
&& (in
->parent
!= in
->myDev
->deletedDir
)) {
5059 /* Move to the unlinked directory so we have a record that it was deleted. */
5060 yaffs_ChangeObjectName(in
, in
->myDev
->deletedDir
,"deleted", 0, 0);
5064 yaffs_RemoveObjectFromDirectory(in
);
5065 yaffs_DeleteChunk(in
->myDev
, in
->chunkId
, 1, __LINE__
);
5068 yaffs_FreeObject(in
);
5073 /* yaffs_DeleteFile deletes the whole file data
5074 * and the inode associated with the file.
5075 * It does not delete the links associated with the file.
5077 static int yaffs_UnlinkFile(yaffs_Object
* in
)
5081 int immediateDeletion
= 0;
5086 immediateDeletion
= 1;
5090 if (in
->inUse
<= 0) {
5091 immediateDeletion
= 1;
5095 if (immediateDeletion
) {
5097 yaffs_ChangeObjectName(in
, in
->myDev
->deletedDir
,
5099 T(YAFFS_TRACE_TRACING
,
5100 (TSTR("yaffs: immediate deletion of file %d" TENDSTR
),
5103 in
->myDev
->nDeletedFiles
++;
5104 if (0 && in
->myDev
->isYaffs2
) {
5105 yaffs_ResizeFile(in
, 0);
5107 yaffs_SoftDeleteFile(in
);
5110 yaffs_ChangeObjectName(in
, in
->myDev
->unlinkedDir
,
5118 int yaffs_DeleteFile(yaffs_Object
* in
)
5120 int retVal
= YAFFS_OK
;
5122 if (in
->nDataChunks
> 0) {
5123 /* Use soft deletion if there is data in the file */
5124 if (!in
->unlinked
) {
5125 retVal
= yaffs_UnlinkFile(in
);
5127 if (retVal
== YAFFS_OK
&& in
->unlinked
&& !in
->deleted
) {
5129 in
->myDev
->nDeletedFiles
++;
5130 yaffs_SoftDeleteFile(in
);
5132 return in
->deleted
? YAFFS_OK
: YAFFS_FAIL
;
5134 /* The file has no data chunks so we toss it immediately */
5135 yaffs_FreeTnode(in
->myDev
, in
->variant
.fileVariant
.top
);
5136 in
->variant
.fileVariant
.top
= NULL
;
5137 yaffs_DoGenericObjectDeletion(in
);
5143 static int yaffs_DeleteDirectory(yaffs_Object
* in
)
5145 /* First check that the directory is empty. */
5146 if (list_empty(&in
->variant
.directoryVariant
.children
)) {
5147 return yaffs_DoGenericObjectDeletion(in
);
5154 static int yaffs_DeleteSymLink(yaffs_Object
* in
)
5156 YFREE(in
->variant
.symLinkVariant
.alias
);
5158 return yaffs_DoGenericObjectDeletion(in
);
5161 static int yaffs_DeleteHardLink(yaffs_Object
* in
)
5163 /* remove this hardlink from the list assocaited with the equivalent
5166 list_del(&in
->hardLinks
);
5167 return yaffs_DoGenericObjectDeletion(in
);
5170 static void yaffs_DestroyObject(yaffs_Object
* obj
)
5172 switch (obj
->variantType
) {
5173 case YAFFS_OBJECT_TYPE_FILE
:
5174 yaffs_DeleteFile(obj
);
5176 case YAFFS_OBJECT_TYPE_DIRECTORY
:
5177 yaffs_DeleteDirectory(obj
);
5179 case YAFFS_OBJECT_TYPE_SYMLINK
:
5180 yaffs_DeleteSymLink(obj
);
5182 case YAFFS_OBJECT_TYPE_HARDLINK
:
5183 yaffs_DeleteHardLink(obj
);
5185 case YAFFS_OBJECT_TYPE_SPECIAL
:
5186 yaffs_DoGenericObjectDeletion(obj
);
5188 case YAFFS_OBJECT_TYPE_UNKNOWN
:
5189 break; /* should not happen. */
5193 static int yaffs_UnlinkWorker(yaffs_Object
* obj
)
5196 if (obj
->variantType
== YAFFS_OBJECT_TYPE_HARDLINK
) {
5197 return yaffs_DeleteHardLink(obj
);
5198 } else if (!list_empty(&obj
->hardLinks
)) {
5199 /* Curve ball: We're unlinking an object that has a hardlink.
5201 * This problem arises because we are not strictly following
5202 * The Linux link/inode model.
5204 * We can't really delete the object.
5205 * Instead, we do the following:
5206 * - Select a hardlink.
5207 * - Unhook it from the hard links
5208 * - Unhook it from its parent directory (so that the rename can work)
5209 * - Rename the object to the hardlink's name.
5210 * - Delete the hardlink
5215 YCHAR name
[YAFFS_MAX_NAME_LENGTH
+ 1];
5217 hl
= list_entry(obj
->hardLinks
.next
, yaffs_Object
, hardLinks
);
5219 list_del_init(&hl
->hardLinks
);
5220 list_del_init(&hl
->siblings
);
5222 yaffs_GetObjectName(hl
, name
, YAFFS_MAX_NAME_LENGTH
+ 1);
5224 retVal
= yaffs_ChangeObjectName(obj
, hl
->parent
, name
, 0, 0);
5226 if (retVal
== YAFFS_OK
) {
5227 retVal
= yaffs_DoGenericObjectDeletion(hl
);
5232 switch (obj
->variantType
) {
5233 case YAFFS_OBJECT_TYPE_FILE
:
5234 return yaffs_UnlinkFile(obj
);
5236 case YAFFS_OBJECT_TYPE_DIRECTORY
:
5237 return yaffs_DeleteDirectory(obj
);
5239 case YAFFS_OBJECT_TYPE_SYMLINK
:
5240 return yaffs_DeleteSymLink(obj
);
5242 case YAFFS_OBJECT_TYPE_SPECIAL
:
5243 return yaffs_DoGenericObjectDeletion(obj
);
5245 case YAFFS_OBJECT_TYPE_HARDLINK
:
5246 case YAFFS_OBJECT_TYPE_UNKNOWN
:
5254 static int yaffs_UnlinkObject( yaffs_Object
*obj
)
5257 if (obj
&& obj
->unlinkAllowed
) {
5258 return yaffs_UnlinkWorker(obj
);
5264 int yaffs_Unlink(yaffs_Object
* dir
, const YCHAR
* name
)
5268 obj
= yaffs_FindObjectByName(dir
, name
);
5269 return yaffs_UnlinkObject(obj
);
5272 /*----------------------- Initialisation Scanning ---------------------- */
5274 static void yaffs_HandleShadowedObject(yaffs_Device
* dev
, int objId
,
5275 int backwardScanning
)
5279 if (!backwardScanning
) {
5280 /* Handle YAFFS1 forward scanning case
5281 * For YAFFS1 we always do the deletion
5285 /* Handle YAFFS2 case (backward scanning)
5286 * If the shadowed object exists then ignore.
5288 if (yaffs_FindObjectByNumber(dev
, objId
)) {
5293 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5294 * We put it in unlinked dir to be cleaned up after the scanning
5297 yaffs_FindOrCreateObjectByNumber(dev
, objId
,
5298 YAFFS_OBJECT_TYPE_FILE
);
5299 yaffs_AddObjectToDirectory(dev
->unlinkedDir
, obj
);
5300 obj
->variant
.fileVariant
.shrinkSize
= 0;
5301 obj
->valid
= 1; /* So that we don't read any other info for this file */
5311 static void yaffs_HardlinkFixup(yaffs_Device
*dev
, yaffs_Object
*hardList
)
5318 hardList
= (yaffs_Object
*) (hardList
->hardLinks
.next
);
5320 in
= yaffs_FindObjectByNumber(dev
,
5321 hl
->variant
.hardLinkVariant
.
5322 equivalentObjectId
);
5325 /* Add the hardlink pointers */
5326 hl
->variant
.hardLinkVariant
.equivalentObject
= in
;
5327 list_add(&hl
->hardLinks
, &in
->hardLinks
);
5329 /* Todo Need to report/handle this better.
5330 * Got a problem... hardlink to a non-existant object
5332 hl
->variant
.hardLinkVariant
.equivalentObject
= NULL
;
5333 INIT_LIST_HEAD(&hl
->hardLinks
);
5345 static int ybicmp(const void *a
, const void *b
){
5346 register int aseq
= ((yaffs_BlockIndex
*)a
)->seq
;
5347 register int bseq
= ((yaffs_BlockIndex
*)b
)->seq
;
5348 register int ablock
= ((yaffs_BlockIndex
*)a
)->block
;
5349 register int bblock
= ((yaffs_BlockIndex
*)b
)->block
;
5351 return ablock
- bblock
;
5357 static int yaffs_Scan(yaffs_Device
* dev
)
5359 yaffs_ExtendedTags tags
;
5364 int nBlocksToScan
= 0;
5370 yaffs_BlockState state
;
5371 yaffs_Object
*hardList
= NULL
;
5372 yaffs_BlockInfo
*bi
;
5374 yaffs_ObjectHeader
*oh
;
5376 yaffs_Object
*parent
;
5377 int nBlocks
= dev
->internalEndBlock
- dev
->internalStartBlock
+ 1;
5379 int alloc_failed
= 0;
5384 yaffs_BlockIndex
*blockIndex
= NULL
;
5386 if (dev
->isYaffs2
) {
5388 (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR
)));
5392 //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format.
5395 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR
),
5396 dev
->internalStartBlock
, dev
->internalEndBlock
));
5398 chunkData
= yaffs_GetTempBuffer(dev
, __LINE__
);
5400 dev
->sequenceNumber
= YAFFS_LOWEST_SEQUENCE_NUMBER
;
5402 if (dev
->isYaffs2
) {
5403 blockIndex
= YMALLOC(nBlocks
* sizeof(yaffs_BlockIndex
));
5408 /* Scan all the blocks to determine their state */
5409 for (blk
= dev
->internalStartBlock
; blk
<= dev
->internalEndBlock
; blk
++) {
5410 bi
= yaffs_GetBlockInfo(dev
, blk
);
5411 yaffs_ClearChunkBits(dev
, blk
);
5413 bi
->softDeletions
= 0;
5415 yaffs_QueryInitialBlockState(dev
, blk
, &state
, &sequenceNumber
);
5417 bi
->blockState
= state
;
5418 bi
->sequenceNumber
= sequenceNumber
;
5420 T(YAFFS_TRACE_SCAN_DEBUG
,
5421 (TSTR("Block scanning block %d state %d seq %d" TENDSTR
), blk
,
5422 state
, sequenceNumber
));
5424 if (state
== YAFFS_BLOCK_STATE_DEAD
) {
5425 T(YAFFS_TRACE_BAD_BLOCKS
,
5426 (TSTR("block %d is bad" TENDSTR
), blk
));
5427 } else if (state
== YAFFS_BLOCK_STATE_EMPTY
) {
5428 T(YAFFS_TRACE_SCAN_DEBUG
,
5429 (TSTR("Block empty " TENDSTR
)));
5430 dev
->nErasedBlocks
++;
5431 dev
->nFreeChunks
+= dev
->nChunksPerBlock
;
5432 } else if (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
) {
5434 /* Determine the highest sequence number */
5435 if (dev
->isYaffs2
&&
5436 sequenceNumber
>= YAFFS_LOWEST_SEQUENCE_NUMBER
&&
5437 sequenceNumber
< YAFFS_HIGHEST_SEQUENCE_NUMBER
) {
5439 blockIndex
[nBlocksToScan
].seq
= sequenceNumber
;
5440 blockIndex
[nBlocksToScan
].block
= blk
;
5444 if (sequenceNumber
>= dev
->sequenceNumber
) {
5445 dev
->sequenceNumber
= sequenceNumber
;
5447 } else if (dev
->isYaffs2
) {
5448 /* TODO: Nasty sequence number! */
5451 ("Block scanning block %d has bad sequence number %d"
5452 TENDSTR
), blk
, sequenceNumber
));
5459 * Dungy old bubble sort for now...
5461 if (dev
->isYaffs2
) {
5462 yaffs_BlockIndex temp
;
5466 for (i
= 0; i
< nBlocksToScan
; i
++)
5467 for (j
= i
+ 1; j
< nBlocksToScan
; j
++)
5468 if (blockIndex
[i
].seq
> blockIndex
[j
].seq
) {
5469 temp
= blockIndex
[j
];
5470 blockIndex
[j
] = blockIndex
[i
];
5471 blockIndex
[i
] = temp
;
5475 /* Now scan the blocks looking at the data. */
5476 if (dev
->isYaffs2
) {
5478 endIterator
= nBlocksToScan
- 1;
5479 T(YAFFS_TRACE_SCAN_DEBUG
,
5480 (TSTR("%d blocks to be scanned" TENDSTR
), nBlocksToScan
));
5482 startIterator
= dev
->internalStartBlock
;
5483 endIterator
= dev
->internalEndBlock
;
5486 /* For each block.... */
5487 for (blockIterator
= startIterator
; !alloc_failed
&& blockIterator
<= endIterator
;
5490 if (dev
->isYaffs2
) {
5491 /* get the block to scan in the correct order */
5492 blk
= blockIndex
[blockIterator
].block
;
5494 blk
= blockIterator
;
5497 bi
= yaffs_GetBlockInfo(dev
, blk
);
5498 state
= bi
->blockState
;
5502 /* For each chunk in each block that needs scanning....*/
5503 for (c
= 0; !alloc_failed
&& c
< dev
->nChunksPerBlock
&&
5504 state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
; c
++) {
5505 /* Read the tags and decide what to do */
5506 chunk
= blk
* dev
->nChunksPerBlock
+ c
;
5508 result
= yaffs_ReadChunkWithTagsFromNAND(dev
, chunk
, NULL
,
5511 /* Let's have a good look at this chunk... */
5513 if (!dev
->isYaffs2
&& tags
.chunkDeleted
) {
5519 /*T((" %d %d deleted\n",blk,c)); */
5520 } else if (!tags
.chunkUsed
) {
5521 /* An unassigned chunk in the block
5522 * This means that either the block is empty or
5523 * this is the one being allocated from
5527 /* We're looking at the first chunk in the block so the block is unused */
5528 state
= YAFFS_BLOCK_STATE_EMPTY
;
5529 dev
->nErasedBlocks
++;
5531 /* this is the block being allocated from */
5534 (" Allocating from %d %d" TENDSTR
),
5536 state
= YAFFS_BLOCK_STATE_ALLOCATING
;
5537 dev
->allocationBlock
= blk
;
5538 dev
->allocationPage
= c
;
5539 dev
->allocationBlockFinder
= blk
;
5540 /* Set it to here to encourage the allocator to go forth from here. */
5542 /* Yaffs2 sanity check:
5543 * This should be the one with the highest sequence number
5546 && (dev
->sequenceNumber
!=
5547 bi
->sequenceNumber
)) {
5548 T(YAFFS_TRACE_ALWAYS
,
5550 ("yaffs: Allocation block %d was not highest sequence id:"
5551 " block seq = %d, dev seq = %d"
5552 TENDSTR
), blk
,bi
->sequenceNumber
,dev
->sequenceNumber
));
5556 dev
->nFreeChunks
+= (dev
->nChunksPerBlock
- c
);
5557 } else if (tags
.chunkId
> 0) {
5558 /* chunkId > 0 so it is a data chunk... */
5559 unsigned int endpos
;
5561 yaffs_SetChunkBit(dev
, blk
, c
);
5564 in
= yaffs_FindOrCreateObjectByNumber(dev
,
5567 YAFFS_OBJECT_TYPE_FILE
);
5568 /* PutChunkIntoFile checks for a clash (two data chunks with
5569 * the same chunkId).
5576 if(!yaffs_PutChunkIntoFile(in
, tags
.chunkId
, chunk
,1))
5581 (tags
.chunkId
- 1) * dev
->nDataBytesPerChunk
+
5584 in
->variantType
== YAFFS_OBJECT_TYPE_FILE
5585 && in
->variant
.fileVariant
.scannedFileSize
<
5587 in
->variant
.fileVariant
.
5588 scannedFileSize
= endpos
;
5589 if (!dev
->useHeaderFileSize
) {
5590 in
->variant
.fileVariant
.
5592 in
->variant
.fileVariant
.
5597 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5599 /* chunkId == 0, so it is an ObjectHeader.
5600 * Thus, we read in the object header and make the object
5602 yaffs_SetChunkBit(dev
, blk
, c
);
5605 result
= yaffs_ReadChunkWithTagsFromNAND(dev
, chunk
,
5609 oh
= (yaffs_ObjectHeader
*) chunkData
;
5611 in
= yaffs_FindObjectByNumber(dev
,
5613 if (in
&& in
->variantType
!= oh
->type
) {
5614 /* This should not happen, but somehow
5615 * Wev'e ended up with an objectId that has been reused but not yet
5616 * deleted, and worse still it has changed type. Delete the old object.
5619 yaffs_DestroyObject(in
);
5624 in
= yaffs_FindOrCreateObjectByNumber(dev
,
5632 if (in
&& oh
->shadowsObject
> 0) {
5633 yaffs_HandleShadowedObject(dev
,
5639 if (in
&& in
->valid
) {
5640 /* We have already filled this one. We have a duplicate and need to resolve it. */
5642 unsigned existingSerial
= in
->serial
;
5643 unsigned newSerial
= tags
.serialNumber
;
5645 if (dev
->isYaffs2
||
5646 ((existingSerial
+ 1) & 3) ==
5648 /* Use new one - destroy the exisiting one */
5649 yaffs_DeleteChunk(dev
,
5654 /* Use existing - destroy this one. */
5655 yaffs_DeleteChunk(dev
, chunk
, 1,
5660 if (in
&& !in
->valid
&&
5661 (tags
.objectId
== YAFFS_OBJECTID_ROOT
||
5662 tags
.objectId
== YAFFS_OBJECTID_LOSTNFOUND
)) {
5663 /* We only load some info, don't fiddle with directory structure */
5665 in
->variantType
= oh
->type
;
5667 in
->yst_mode
= oh
->yst_mode
;
5668 #ifdef CONFIG_YAFFS_WINCE
5669 in
->win_atime
[0] = oh
->win_atime
[0];
5670 in
->win_ctime
[0] = oh
->win_ctime
[0];
5671 in
->win_mtime
[0] = oh
->win_mtime
[0];
5672 in
->win_atime
[1] = oh
->win_atime
[1];
5673 in
->win_ctime
[1] = oh
->win_ctime
[1];
5674 in
->win_mtime
[1] = oh
->win_mtime
[1];
5676 in
->yst_uid
= oh
->yst_uid
;
5677 in
->yst_gid
= oh
->yst_gid
;
5678 in
->yst_atime
= oh
->yst_atime
;
5679 in
->yst_mtime
= oh
->yst_mtime
;
5680 in
->yst_ctime
= oh
->yst_ctime
;
5681 in
->yst_rdev
= oh
->yst_rdev
;
5683 in
->chunkId
= chunk
;
5685 } else if (in
&& !in
->valid
) {
5686 /* we need to load this info */
5689 in
->variantType
= oh
->type
;
5691 in
->yst_mode
= oh
->yst_mode
;
5692 #ifdef CONFIG_YAFFS_WINCE
5693 in
->win_atime
[0] = oh
->win_atime
[0];
5694 in
->win_ctime
[0] = oh
->win_ctime
[0];
5695 in
->win_mtime
[0] = oh
->win_mtime
[0];
5696 in
->win_atime
[1] = oh
->win_atime
[1];
5697 in
->win_ctime
[1] = oh
->win_ctime
[1];
5698 in
->win_mtime
[1] = oh
->win_mtime
[1];
5700 in
->yst_uid
= oh
->yst_uid
;
5701 in
->yst_gid
= oh
->yst_gid
;
5702 in
->yst_atime
= oh
->yst_atime
;
5703 in
->yst_mtime
= oh
->yst_mtime
;
5704 in
->yst_ctime
= oh
->yst_ctime
;
5705 in
->yst_rdev
= oh
->yst_rdev
;
5707 in
->chunkId
= chunk
;
5709 yaffs_SetObjectName(in
, oh
->name
);
5712 /* directory stuff...
5717 yaffs_FindOrCreateObjectByNumber
5718 (dev
, oh
->parentObjectId
,
5719 YAFFS_OBJECT_TYPE_DIRECTORY
);
5720 if (parent
->variantType
==
5721 YAFFS_OBJECT_TYPE_UNKNOWN
) {
5722 /* Set up as a directory */
5723 parent
->variantType
=
5724 YAFFS_OBJECT_TYPE_DIRECTORY
;
5725 INIT_LIST_HEAD(&parent
->variant
.
5728 } else if (parent
->variantType
!=
5729 YAFFS_OBJECT_TYPE_DIRECTORY
)
5731 /* Hoosterman, another problem....
5732 * We're trying to use a non-directory as a directory
5735 T(YAFFS_TRACE_ERROR
,
5737 ("yaffs tragedy: attempting to use non-directory as"
5738 " a directory in scan. Put in lost+found."
5740 parent
= dev
->lostNFoundDir
;
5743 yaffs_AddObjectToDirectory(parent
, in
);
5745 if (0 && (parent
== dev
->deletedDir
||
5746 parent
== dev
->unlinkedDir
)) {
5747 in
->deleted
= 1; /* If it is unlinked at start up then it wants deleting */
5748 dev
->nDeletedFiles
++;
5750 /* Note re hardlinks.
5751 * Since we might scan a hardlink before its equivalent object is scanned
5752 * we put them all in a list.
5753 * After scanning is complete, we should have all the objects, so we run through this
5754 * list and fix up all the chains.
5757 switch (in
->variantType
) {
5758 case YAFFS_OBJECT_TYPE_UNKNOWN
:
5759 /* Todo got a problem */
5761 case YAFFS_OBJECT_TYPE_FILE
:
5764 /* Prune back the shrunken chunks */
5765 yaffs_PruneResizedChunks
5767 /* Mark the block as having a shrinkHeader */
5768 bi
->hasShrinkHeader
= 1;
5771 if (dev
->useHeaderFileSize
)
5773 in
->variant
.fileVariant
.
5778 case YAFFS_OBJECT_TYPE_HARDLINK
:
5779 in
->variant
.hardLinkVariant
.
5780 equivalentObjectId
=
5781 oh
->equivalentObjectId
;
5782 in
->hardLinks
.next
=
5783 (struct list_head
*)
5787 case YAFFS_OBJECT_TYPE_DIRECTORY
:
5790 case YAFFS_OBJECT_TYPE_SPECIAL
:
5793 case YAFFS_OBJECT_TYPE_SYMLINK
:
5794 in
->variant
.symLinkVariant
.alias
=
5795 yaffs_CloneString(oh
->alias
);
5796 if(!in
->variant
.symLinkVariant
.alias
)
5801 if (parent
== dev
->deletedDir
) {
5802 yaffs_DestroyObject(in
);
5803 bi
->hasShrinkHeader
= 1;
5809 if (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
) {
5810 /* If we got this far while scanning, then the block is fully allocated.*/
5811 state
= YAFFS_BLOCK_STATE_FULL
;
5814 bi
->blockState
= state
;
5816 /* Now let's see if it was dirty */
5817 if (bi
->pagesInUse
== 0 &&
5818 !bi
->hasShrinkHeader
&&
5819 bi
->blockState
== YAFFS_BLOCK_STATE_FULL
) {
5820 yaffs_BlockBecameDirty(dev
, blk
);
5830 /* Ok, we've done all the scanning.
5831 * Fix up the hard link chains.
5832 * We should now have scanned all the objects, now it's time to add these
5836 yaffs_HardlinkFixup(dev
,hardList
);
5838 /* Handle the unlinked files. Since they were left in an unlinked state we should
5842 struct list_head
*i
;
5843 struct list_head
*n
;
5846 /* Soft delete all the unlinked files */
5847 list_for_each_safe(i
, n
,
5848 &dev
->unlinkedDir
->variant
.directoryVariant
.
5851 l
= list_entry(i
, yaffs_Object
, siblings
);
5852 yaffs_DestroyObject(l
);
5857 yaffs_ReleaseTempBuffer(dev
, chunkData
, __LINE__
);
5863 T(YAFFS_TRACE_SCAN
, (TSTR("yaffs_Scan ends" TENDSTR
)));
5869 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object
*in
)
5872 yaffs_ObjectHeader
*oh
;
5873 yaffs_Device
*dev
= in
->myDev
;
5874 yaffs_ExtendedTags tags
;
5876 int alloc_failed
= 0;
5882 T(YAFFS_TRACE_SCAN
,(TSTR("details for object %d %s loaded" TENDSTR
),
5884 in
->lazyLoaded
? "not yet" : "already"));
5889 chunkData
= yaffs_GetTempBuffer(dev
, __LINE__
);
5891 result
= yaffs_ReadChunkWithTagsFromNAND(dev
,in
->chunkId
,chunkData
,&tags
);
5892 oh
= (yaffs_ObjectHeader
*) chunkData
;
5894 in
->yst_mode
= oh
->yst_mode
;
5895 #ifdef CONFIG_YAFFS_WINCE
5896 in
->win_atime
[0] = oh
->win_atime
[0];
5897 in
->win_ctime
[0] = oh
->win_ctime
[0];
5898 in
->win_mtime
[0] = oh
->win_mtime
[0];
5899 in
->win_atime
[1] = oh
->win_atime
[1];
5900 in
->win_ctime
[1] = oh
->win_ctime
[1];
5901 in
->win_mtime
[1] = oh
->win_mtime
[1];
5903 in
->yst_uid
= oh
->yst_uid
;
5904 in
->yst_gid
= oh
->yst_gid
;
5905 in
->yst_atime
= oh
->yst_atime
;
5906 in
->yst_mtime
= oh
->yst_mtime
;
5907 in
->yst_ctime
= oh
->yst_ctime
;
5908 in
->yst_rdev
= oh
->yst_rdev
;
5911 yaffs_SetObjectName(in
, oh
->name
);
5913 if(in
->variantType
== YAFFS_OBJECT_TYPE_SYMLINK
){
5914 in
->variant
.symLinkVariant
.alias
=
5915 yaffs_CloneString(oh
->alias
);
5916 if(!in
->variant
.symLinkVariant
.alias
)
5917 alloc_failed
= 1; /* Not returned to caller */
5920 yaffs_ReleaseTempBuffer(dev
,chunkData
, __LINE__
);
5924 static int yaffs_ScanBackwards(yaffs_Device
* dev
)
5926 yaffs_ExtendedTags tags
;
5931 int nBlocksToScan
= 0;
5937 yaffs_BlockState state
;
5938 yaffs_Object
*hardList
= NULL
;
5939 yaffs_BlockInfo
*bi
;
5941 yaffs_ObjectHeader
*oh
;
5943 yaffs_Object
*parent
;
5944 int nBlocks
= dev
->internalEndBlock
- dev
->internalStartBlock
+ 1;
5950 int foundChunksInBlock
;
5951 int equivalentObjectId
;
5952 int alloc_failed
= 0;
5955 yaffs_BlockIndex
*blockIndex
= NULL
;
5956 int altBlockIndex
= 0;
5958 if (!dev
->isYaffs2
) {
5960 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR
)));
5966 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
5967 TENDSTR
), dev
->internalStartBlock
, dev
->internalEndBlock
));
5970 dev
->sequenceNumber
= YAFFS_LOWEST_SEQUENCE_NUMBER
;
5972 blockIndex
= YMALLOC(nBlocks
* sizeof(yaffs_BlockIndex
));
5975 blockIndex
= YMALLOC_ALT(nBlocks
* sizeof(yaffs_BlockIndex
));
5981 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR
)));
5985 dev
->blocksInCheckpoint
= 0;
5987 chunkData
= yaffs_GetTempBuffer(dev
, __LINE__
);
5989 /* Scan all the blocks to determine their state */
5990 for (blk
= dev
->internalStartBlock
; blk
<= dev
->internalEndBlock
; blk
++) {
5991 bi
= yaffs_GetBlockInfo(dev
, blk
);
5992 yaffs_ClearChunkBits(dev
, blk
);
5994 bi
->softDeletions
= 0;
5996 yaffs_QueryInitialBlockState(dev
, blk
, &state
, &sequenceNumber
);
5998 bi
->blockState
= state
;
5999 bi
->sequenceNumber
= sequenceNumber
;
6001 if(bi
->sequenceNumber
== YAFFS_SEQUENCE_CHECKPOINT_DATA
)
6002 bi
->blockState
= state
= YAFFS_BLOCK_STATE_CHECKPOINT
;
6004 T(YAFFS_TRACE_SCAN_DEBUG
,
6005 (TSTR("Block scanning block %d state %d seq %d" TENDSTR
), blk
,
6006 state
, sequenceNumber
));
6009 if(state
== YAFFS_BLOCK_STATE_CHECKPOINT
){
6010 dev
->blocksInCheckpoint
++;
6012 } else if (state
== YAFFS_BLOCK_STATE_DEAD
) {
6013 T(YAFFS_TRACE_BAD_BLOCKS
,
6014 (TSTR("block %d is bad" TENDSTR
), blk
));
6015 } else if (state
== YAFFS_BLOCK_STATE_EMPTY
) {
6016 T(YAFFS_TRACE_SCAN_DEBUG
,
6017 (TSTR("Block empty " TENDSTR
)));
6018 dev
->nErasedBlocks
++;
6019 dev
->nFreeChunks
+= dev
->nChunksPerBlock
;
6020 } else if (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
) {
6022 /* Determine the highest sequence number */
6023 if (dev
->isYaffs2
&&
6024 sequenceNumber
>= YAFFS_LOWEST_SEQUENCE_NUMBER
&&
6025 sequenceNumber
< YAFFS_HIGHEST_SEQUENCE_NUMBER
) {
6027 blockIndex
[nBlocksToScan
].seq
= sequenceNumber
;
6028 blockIndex
[nBlocksToScan
].block
= blk
;
6032 if (sequenceNumber
>= dev
->sequenceNumber
) {
6033 dev
->sequenceNumber
= sequenceNumber
;
6035 } else if (dev
->isYaffs2
) {
6036 /* TODO: Nasty sequence number! */
6039 ("Block scanning block %d has bad sequence number %d"
6040 TENDSTR
), blk
, sequenceNumber
));
6047 (TSTR("%d blocks to be sorted..." TENDSTR
), nBlocksToScan
));
6053 /* Sort the blocks */
6054 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6055 yaffs_qsort(blockIndex
, nBlocksToScan
,
6056 sizeof(yaffs_BlockIndex
), ybicmp
);
6059 /* Dungy old bubble sort... */
6061 yaffs_BlockIndex temp
;
6065 for (i
= 0; i
< nBlocksToScan
; i
++)
6066 for (j
= i
+ 1; j
< nBlocksToScan
; j
++)
6067 if (blockIndex
[i
].seq
> blockIndex
[j
].seq
) {
6068 temp
= blockIndex
[j
];
6069 blockIndex
[j
] = blockIndex
[i
];
6070 blockIndex
[i
] = temp
;
6077 T(YAFFS_TRACE_SCAN
, (TSTR("...done" TENDSTR
)));
6079 /* Now scan the blocks looking at the data. */
6081 endIterator
= nBlocksToScan
- 1;
6082 T(YAFFS_TRACE_SCAN_DEBUG
,
6083 (TSTR("%d blocks to be scanned" TENDSTR
), nBlocksToScan
));
6085 /* For each block.... backwards */
6086 for (blockIterator
= endIterator
; !alloc_failed
&& blockIterator
>= startIterator
;
6088 /* Cooperative multitasking! This loop can run for so
6089 long that watchdog timers expire. */
6092 /* get the block to scan in the correct order */
6093 blk
= blockIndex
[blockIterator
].block
;
6095 bi
= yaffs_GetBlockInfo(dev
, blk
);
6098 state
= bi
->blockState
;
6102 /* For each chunk in each block that needs scanning.... */
6103 foundChunksInBlock
= 0;
6104 for (c
= dev
->nChunksPerBlock
- 1;
6105 !alloc_failed
&& c
>= 0 &&
6106 (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
||
6107 state
== YAFFS_BLOCK_STATE_ALLOCATING
); c
--) {
6108 /* Scan backwards...
6109 * Read the tags and decide what to do
6112 chunk
= blk
* dev
->nChunksPerBlock
+ c
;
6114 result
= yaffs_ReadChunkWithTagsFromNAND(dev
, chunk
, NULL
,
6117 /* Let's have a good look at this chunk... */
6119 if (!tags
.chunkUsed
) {
6120 /* An unassigned chunk in the block.
6121 * If there are used chunks after this one, then
6122 * it is a chunk that was skipped due to failing the erased
6123 * check. Just skip it so that it can be deleted.
6124 * But, more typically, We get here when this is an unallocated
6125 * chunk and his means that either the block is empty or
6126 * this is the one being allocated from
6129 if(foundChunksInBlock
)
6131 /* This is a chunk that was skipped due to failing the erased check */
6133 } else if (c
== 0) {
6134 /* We're looking at the first chunk in the block so the block is unused */
6135 state
= YAFFS_BLOCK_STATE_EMPTY
;
6136 dev
->nErasedBlocks
++;
6138 if (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
||
6139 state
== YAFFS_BLOCK_STATE_ALLOCATING
) {
6140 if(dev
->sequenceNumber
== bi
->sequenceNumber
) {
6141 /* this is the block being allocated from */
6145 (" Allocating from %d %d"
6148 state
= YAFFS_BLOCK_STATE_ALLOCATING
;
6149 dev
->allocationBlock
= blk
;
6150 dev
->allocationPage
= c
;
6151 dev
->allocationBlockFinder
= blk
;
6154 /* This is a partially written block that is not
6155 * the current allocation block. This block must have
6156 * had a write failure, so set up for retirement.
6159 bi
->needsRetiring
= 1;
6160 bi
->gcPrioritise
= 1;
6162 T(YAFFS_TRACE_ALWAYS
,
6163 (TSTR("Partially written block %d being set for retirement" TENDSTR
),
6173 } else if (tags
.chunkId
> 0) {
6174 /* chunkId > 0 so it is a data chunk... */
6175 unsigned int endpos
;
6177 (tags
.chunkId
- 1) * dev
->nDataBytesPerChunk
;
6179 foundChunksInBlock
= 1;
6182 yaffs_SetChunkBit(dev
, blk
, c
);
6185 in
= yaffs_FindOrCreateObjectByNumber(dev
,
6188 YAFFS_OBJECT_TYPE_FILE
);
6195 in
->variantType
== YAFFS_OBJECT_TYPE_FILE
6197 in
->variant
.fileVariant
.shrinkSize
) {
6198 /* This has not been invalidated by a resize */
6199 if(!yaffs_PutChunkIntoFile(in
, tags
.chunkId
,
6204 /* File size is calculated by looking at the data chunks if we have not
6205 * seen an object header yet. Stop this practice once we find an object header.
6209 1) * dev
->nDataBytesPerChunk
+
6212 if (!in
->valid
&& /* have not got an object header yet */
6213 in
->variant
.fileVariant
.
6214 scannedFileSize
< endpos
) {
6215 in
->variant
.fileVariant
.
6216 scannedFileSize
= endpos
;
6217 in
->variant
.fileVariant
.
6219 in
->variant
.fileVariant
.
6224 /* This chunk has been invalidated by a resize, so delete */
6225 yaffs_DeleteChunk(dev
, chunk
, 1, __LINE__
);
6229 /* chunkId == 0, so it is an ObjectHeader.
6230 * Thus, we read in the object header and make the object
6232 foundChunksInBlock
= 1;
6234 yaffs_SetChunkBit(dev
, blk
, c
);
6240 if (tags
.extraHeaderInfoAvailable
) {
6241 in
= yaffs_FindOrCreateObjectByNumber
6242 (dev
, tags
.objectId
,
6243 tags
.extraObjectType
);
6247 #ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
6250 tags
.extraShadows
||
6252 (tags
.objectId
== YAFFS_OBJECTID_ROOT
||
6253 tags
.objectId
== YAFFS_OBJECTID_LOSTNFOUND
))
6256 /* If we don't have valid info then we need to read the chunk
6257 * TODO In future we can probably defer reading the chunk and
6258 * living with invalid data until needed.
6261 result
= yaffs_ReadChunkWithTagsFromNAND(dev
,
6266 oh
= (yaffs_ObjectHeader
*) chunkData
;
6269 in
= yaffs_FindOrCreateObjectByNumber(dev
, tags
.objectId
, oh
->type
);
6274 /* TODO Hoosterman we have a problem! */
6275 T(YAFFS_TRACE_ERROR
,
6277 ("yaffs tragedy: Could not make object for object %d "
6278 "at chunk %d during scan"
6279 TENDSTR
), tags
.objectId
, chunk
));
6284 /* We have already filled this one.
6285 * We have a duplicate that will be discarded, but
6286 * we first have to suck out resize info if it is a file.
6289 if ((in
->variantType
== YAFFS_OBJECT_TYPE_FILE
) &&
6291 oh
-> type
== YAFFS_OBJECT_TYPE_FILE
)||
6292 (tags
.extraHeaderInfoAvailable
&&
6293 tags
.extraObjectType
== YAFFS_OBJECT_TYPE_FILE
))
6296 (oh
) ? oh
->fileSize
: tags
.
6298 __u32 parentObjectId
=
6300 parentObjectId
: tags
.
6301 extraParentObjectId
;
6303 (oh
) ? oh
->isShrink
: tags
.
6304 extraIsShrinkHeader
;
6306 /* If it is deleted (unlinked at start also means deleted)
6307 * we treat the file size as being zeroed at this point.
6309 if (parentObjectId
==
6310 YAFFS_OBJECTID_DELETED
6311 || parentObjectId
==
6312 YAFFS_OBJECTID_UNLINKED
) {
6318 in
->variant
.fileVariant
.
6319 shrinkSize
> thisSize
) {
6320 in
->variant
.fileVariant
.
6326 bi
->hasShrinkHeader
= 1;
6330 /* Use existing - destroy this one. */
6331 yaffs_DeleteChunk(dev
, chunk
, 1, __LINE__
);
6336 (tags
.objectId
== YAFFS_OBJECTID_ROOT
||
6338 YAFFS_OBJECTID_LOSTNFOUND
)) {
6339 /* We only load some info, don't fiddle with directory structure */
6343 in
->variantType
= oh
->type
;
6345 in
->yst_mode
= oh
->yst_mode
;
6346 #ifdef CONFIG_YAFFS_WINCE
6347 in
->win_atime
[0] = oh
->win_atime
[0];
6348 in
->win_ctime
[0] = oh
->win_ctime
[0];
6349 in
->win_mtime
[0] = oh
->win_mtime
[0];
6350 in
->win_atime
[1] = oh
->win_atime
[1];
6351 in
->win_ctime
[1] = oh
->win_ctime
[1];
6352 in
->win_mtime
[1] = oh
->win_mtime
[1];
6354 in
->yst_uid
= oh
->yst_uid
;
6355 in
->yst_gid
= oh
->yst_gid
;
6356 in
->yst_atime
= oh
->yst_atime
;
6357 in
->yst_mtime
= oh
->yst_mtime
;
6358 in
->yst_ctime
= oh
->yst_ctime
;
6359 in
->yst_rdev
= oh
->yst_rdev
;
6363 in
->variantType
= tags
.extraObjectType
;
6367 in
->chunkId
= chunk
;
6369 } else if (!in
->valid
) {
6370 /* we need to load this info */
6373 in
->chunkId
= chunk
;
6376 in
->variantType
= oh
->type
;
6378 in
->yst_mode
= oh
->yst_mode
;
6379 #ifdef CONFIG_YAFFS_WINCE
6380 in
->win_atime
[0] = oh
->win_atime
[0];
6381 in
->win_ctime
[0] = oh
->win_ctime
[0];
6382 in
->win_mtime
[0] = oh
->win_mtime
[0];
6383 in
->win_atime
[1] = oh
->win_atime
[1];
6384 in
->win_ctime
[1] = oh
->win_ctime
[1];
6385 in
->win_mtime
[1] = oh
->win_mtime
[1];
6387 in
->yst_uid
= oh
->yst_uid
;
6388 in
->yst_gid
= oh
->yst_gid
;
6389 in
->yst_atime
= oh
->yst_atime
;
6390 in
->yst_mtime
= oh
->yst_mtime
;
6391 in
->yst_ctime
= oh
->yst_ctime
;
6392 in
->yst_rdev
= oh
->yst_rdev
;
6395 if (oh
->shadowsObject
> 0)
6396 yaffs_HandleShadowedObject(dev
,
6402 yaffs_SetObjectName(in
, oh
->name
);
6404 yaffs_FindOrCreateObjectByNumber
6405 (dev
, oh
->parentObjectId
,
6406 YAFFS_OBJECT_TYPE_DIRECTORY
);
6408 fileSize
= oh
->fileSize
;
6409 isShrink
= oh
->isShrink
;
6410 equivalentObjectId
= oh
->equivalentObjectId
;
6414 in
->variantType
= tags
.extraObjectType
;
6416 yaffs_FindOrCreateObjectByNumber
6417 (dev
, tags
.extraParentObjectId
,
6418 YAFFS_OBJECT_TYPE_DIRECTORY
);
6419 fileSize
= tags
.extraFileLength
;
6420 isShrink
= tags
.extraIsShrinkHeader
;
6421 equivalentObjectId
= tags
.extraEquivalentObjectId
;
6427 /* directory stuff...
6431 if (parent
->variantType
==
6432 YAFFS_OBJECT_TYPE_UNKNOWN
) {
6433 /* Set up as a directory */
6434 parent
->variantType
=
6435 YAFFS_OBJECT_TYPE_DIRECTORY
;
6436 INIT_LIST_HEAD(&parent
->variant
.
6439 } else if (parent
->variantType
!=
6440 YAFFS_OBJECT_TYPE_DIRECTORY
)
6442 /* Hoosterman, another problem....
6443 * We're trying to use a non-directory as a directory
6446 T(YAFFS_TRACE_ERROR
,
6448 ("yaffs tragedy: attempting to use non-directory as"
6449 " a directory in scan. Put in lost+found."
6451 parent
= dev
->lostNFoundDir
;
6454 yaffs_AddObjectToDirectory(parent
, in
);
6456 itsUnlinked
= (parent
== dev
->deletedDir
) ||
6457 (parent
== dev
->unlinkedDir
);
6460 /* Mark the block as having a shrinkHeader */
6461 bi
->hasShrinkHeader
= 1;
6464 /* Note re hardlinks.
6465 * Since we might scan a hardlink before its equivalent object is scanned
6466 * we put them all in a list.
6467 * After scanning is complete, we should have all the objects, so we run
6468 * through this list and fix up all the chains.
6471 switch (in
->variantType
) {
6472 case YAFFS_OBJECT_TYPE_UNKNOWN
:
6473 /* Todo got a problem */
6475 case YAFFS_OBJECT_TYPE_FILE
:
6477 if (in
->variant
.fileVariant
.
6478 scannedFileSize
< fileSize
) {
6479 /* This covers the case where the file size is greater
6480 * than where the data is
6481 * This will happen if the file is resized to be larger
6482 * than its current data extents.
6484 in
->variant
.fileVariant
.fileSize
= fileSize
;
6485 in
->variant
.fileVariant
.scannedFileSize
=
6486 in
->variant
.fileVariant
.fileSize
;
6490 in
->variant
.fileVariant
.shrinkSize
> fileSize
) {
6491 in
->variant
.fileVariant
.shrinkSize
= fileSize
;
6495 case YAFFS_OBJECT_TYPE_HARDLINK
:
6497 in
->variant
.hardLinkVariant
.equivalentObjectId
=
6499 in
->hardLinks
.next
=
6500 (struct list_head
*) hardList
;
6504 case YAFFS_OBJECT_TYPE_DIRECTORY
:
6507 case YAFFS_OBJECT_TYPE_SPECIAL
:
6510 case YAFFS_OBJECT_TYPE_SYMLINK
:
6512 in
->variant
.symLinkVariant
.alias
=
6513 yaffs_CloneString(oh
->
6515 if(!in
->variant
.symLinkVariant
.alias
)
6525 } /* End of scanning for each chunk */
6527 if (state
== YAFFS_BLOCK_STATE_NEEDS_SCANNING
) {
6528 /* If we got this far while scanning, then the block is fully allocated. */
6529 state
= YAFFS_BLOCK_STATE_FULL
;
6532 bi
->blockState
= state
;
6534 /* Now let's see if it was dirty */
6535 if (bi
->pagesInUse
== 0 &&
6536 !bi
->hasShrinkHeader
&&
6537 bi
->blockState
== YAFFS_BLOCK_STATE_FULL
) {
6538 yaffs_BlockBecameDirty(dev
, blk
);
6544 YFREE_ALT(blockIndex
);
6548 /* Ok, we've done all the scanning.
6549 * Fix up the hard link chains.
6550 * We should now have scanned all the objects, now it's time to add these
6553 yaffs_HardlinkFixup(dev
,hardList
);
6557 * Sort out state of unlinked and deleted objects.
6560 struct list_head
*i
;
6561 struct list_head
*n
;
6565 /* Soft delete all the unlinked files */
6566 list_for_each_safe(i
, n
,
6567 &dev
->unlinkedDir
->variant
.directoryVariant
.
6570 l
= list_entry(i
, yaffs_Object
, siblings
);
6571 yaffs_DestroyObject(l
);
6575 /* Soft delete all the deletedDir files */
6576 list_for_each_safe(i
, n
,
6577 &dev
->deletedDir
->variant
.directoryVariant
.
6580 l
= list_entry(i
, yaffs_Object
, siblings
);
6581 yaffs_DestroyObject(l
);
6587 yaffs_ReleaseTempBuffer(dev
, chunkData
, __LINE__
);
6593 T(YAFFS_TRACE_SCAN
, (TSTR("yaffs_ScanBackwards ends" TENDSTR
)));
6598 /*------------------------------ Directory Functions ----------------------------- */
6600 static void yaffs_RemoveObjectFromDirectory(yaffs_Object
* obj
)
6602 yaffs_Device
*dev
= obj
->myDev
;
6604 if(dev
&& dev
->removeObjectCallback
)
6605 dev
->removeObjectCallback(obj
);
6607 list_del_init(&obj
->siblings
);
6612 static void yaffs_AddObjectToDirectory(yaffs_Object
* directory
,
6617 T(YAFFS_TRACE_ALWAYS
,
6619 ("tragedy: Trying to add an object to a null pointer directory"
6623 if (directory
->variantType
!= YAFFS_OBJECT_TYPE_DIRECTORY
) {
6624 T(YAFFS_TRACE_ALWAYS
,
6626 ("tragedy: Trying to add an object to a non-directory"
6631 if (obj
->siblings
.prev
== NULL
) {
6632 /* Not initialised */
6633 INIT_LIST_HEAD(&obj
->siblings
);
6635 } else if (!list_empty(&obj
->siblings
)) {
6636 /* If it is holed up somewhere else, un hook it */
6637 yaffs_RemoveObjectFromDirectory(obj
);
6640 list_add(&obj
->siblings
, &directory
->variant
.directoryVariant
.children
);
6641 obj
->parent
= directory
;
6643 if (directory
== obj
->myDev
->unlinkedDir
6644 || directory
== obj
->myDev
->deletedDir
) {
6646 obj
->myDev
->nUnlinkedFiles
++;
6647 obj
->renameAllowed
= 0;
6651 yaffs_Object
*yaffs_FindObjectByName(yaffs_Object
* directory
,
6656 struct list_head
*i
;
6657 YCHAR buffer
[YAFFS_MAX_NAME_LENGTH
+ 1];
6666 T(YAFFS_TRACE_ALWAYS
,
6668 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6672 if (directory
->variantType
!= YAFFS_OBJECT_TYPE_DIRECTORY
) {
6673 T(YAFFS_TRACE_ALWAYS
,
6675 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR
)));
6679 sum
= yaffs_CalcNameSum(name
);
6681 list_for_each(i
, &directory
->variant
.directoryVariant
.children
) {
6683 l
= list_entry(i
, yaffs_Object
, siblings
);
6685 yaffs_CheckObjectDetailsLoaded(l
);
6687 /* Special case for lost-n-found */
6688 if (l
->objectId
== YAFFS_OBJECTID_LOSTNFOUND
) {
6689 if (yaffs_strcmp(name
, YAFFS_LOSTNFOUND_NAME
) == 0) {
6692 } else if (yaffs_SumCompare(l
->sum
, sum
) || l
->chunkId
<= 0)
6694 /* LostnFound cunk called Objxxx
6697 yaffs_GetObjectName(l
, buffer
,
6698 YAFFS_MAX_NAME_LENGTH
);
6699 if (yaffs_strncmp(name
, buffer
,YAFFS_MAX_NAME_LENGTH
) == 0) {
6712 int yaffs_ApplyToDirectoryChildren(yaffs_Object
* theDir
,
6713 int (*fn
) (yaffs_Object
*))
6715 struct list_head
*i
;
6719 T(YAFFS_TRACE_ALWAYS
,
6721 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6725 if (theDir
->variantType
!= YAFFS_OBJECT_TYPE_DIRECTORY
) {
6726 T(YAFFS_TRACE_ALWAYS
,
6728 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR
)));
6732 list_for_each(i
, &theDir
->variant
.directoryVariant
.children
) {
6734 l
= list_entry(i
, yaffs_Object
, siblings
);
6746 /* GetEquivalentObject dereferences any hard links to get to the
6750 yaffs_Object
*yaffs_GetEquivalentObject(yaffs_Object
* obj
)
6752 if (obj
&& obj
->variantType
== YAFFS_OBJECT_TYPE_HARDLINK
) {
6753 /* We want the object id of the equivalent object, not this one */
6754 obj
= obj
->variant
.hardLinkVariant
.equivalentObject
;
6755 yaffs_CheckObjectDetailsLoaded(obj
);
6761 int yaffs_GetObjectName(yaffs_Object
* obj
, YCHAR
* name
, int buffSize
)
6763 memset(name
, 0, buffSize
* sizeof(YCHAR
));
6765 yaffs_CheckObjectDetailsLoaded(obj
);
6767 if (obj
->objectId
== YAFFS_OBJECTID_LOSTNFOUND
) {
6768 yaffs_strncpy(name
, YAFFS_LOSTNFOUND_NAME
, buffSize
- 1);
6769 } else if (obj
->chunkId
<= 0) {
6771 /* make up a name */
6772 yaffs_sprintf(locName
, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX
,
6774 yaffs_strncpy(name
, locName
, buffSize
- 1);
6777 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
6778 else if (obj
->shortName
[0]) {
6779 yaffs_strcpy(name
, obj
->shortName
);
6784 __u8
*buffer
= yaffs_GetTempBuffer(obj
->myDev
, __LINE__
);
6786 yaffs_ObjectHeader
*oh
= (yaffs_ObjectHeader
*) buffer
;
6788 memset(buffer
, 0, obj
->myDev
->nDataBytesPerChunk
);
6790 if (obj
->chunkId
>= 0) {
6791 result
= yaffs_ReadChunkWithTagsFromNAND(obj
->myDev
,
6792 obj
->chunkId
, buffer
,
6795 yaffs_strncpy(name
, oh
->name
, buffSize
- 1);
6797 yaffs_ReleaseTempBuffer(obj
->myDev
, buffer
, __LINE__
);
6800 return yaffs_strlen(name
);
6803 int yaffs_GetObjectFileLength(yaffs_Object
* obj
)
6806 /* Dereference any hard linking */
6807 obj
= yaffs_GetEquivalentObject(obj
);
6809 if (obj
->variantType
== YAFFS_OBJECT_TYPE_FILE
) {
6810 return obj
->variant
.fileVariant
.fileSize
;
6812 if (obj
->variantType
== YAFFS_OBJECT_TYPE_SYMLINK
) {
6813 return yaffs_strlen(obj
->variant
.symLinkVariant
.alias
);
6815 /* Only a directory should drop through to here */
6816 return obj
->myDev
->nDataBytesPerChunk
;
6820 int yaffs_GetObjectLinkCount(yaffs_Object
* obj
)
6823 struct list_head
*i
;
6825 if (!obj
->unlinked
) {
6826 count
++; /* the object itself */
6828 list_for_each(i
, &obj
->hardLinks
) {
6829 count
++; /* add the hard links; */
6835 int yaffs_GetObjectInode(yaffs_Object
* obj
)
6837 obj
= yaffs_GetEquivalentObject(obj
);
6839 return obj
->objectId
;
6842 unsigned yaffs_GetObjectType(yaffs_Object
* obj
)
6844 obj
= yaffs_GetEquivalentObject(obj
);
6846 switch (obj
->variantType
) {
6847 case YAFFS_OBJECT_TYPE_FILE
:
6850 case YAFFS_OBJECT_TYPE_DIRECTORY
:
6853 case YAFFS_OBJECT_TYPE_SYMLINK
:
6856 case YAFFS_OBJECT_TYPE_HARDLINK
:
6859 case YAFFS_OBJECT_TYPE_SPECIAL
:
6860 if (S_ISFIFO(obj
->yst_mode
))
6862 if (S_ISCHR(obj
->yst_mode
))
6864 if (S_ISBLK(obj
->yst_mode
))
6866 if (S_ISSOCK(obj
->yst_mode
))
6874 YCHAR
*yaffs_GetSymlinkAlias(yaffs_Object
* obj
)
6876 obj
= yaffs_GetEquivalentObject(obj
);
6877 if (obj
->variantType
== YAFFS_OBJECT_TYPE_SYMLINK
) {
6878 return yaffs_CloneString(obj
->variant
.symLinkVariant
.alias
);
6880 return yaffs_CloneString(_Y(""));
6884 #ifndef CONFIG_YAFFS_WINCE
6886 int yaffs_SetAttributes(yaffs_Object
* obj
, struct iattr
*attr
)
6888 unsigned int valid
= attr
->ia_valid
;
6890 if (valid
& ATTR_MODE
)
6891 obj
->yst_mode
= attr
->ia_mode
;
6892 if (valid
& ATTR_UID
)
6893 obj
->yst_uid
= attr
->ia_uid
;
6894 if (valid
& ATTR_GID
)
6895 obj
->yst_gid
= attr
->ia_gid
;
6897 if (valid
& ATTR_ATIME
)
6898 obj
->yst_atime
= Y_TIME_CONVERT(attr
->ia_atime
);
6899 if (valid
& ATTR_CTIME
)
6900 obj
->yst_ctime
= Y_TIME_CONVERT(attr
->ia_ctime
);
6901 if (valid
& ATTR_MTIME
)
6902 obj
->yst_mtime
= Y_TIME_CONVERT(attr
->ia_mtime
);
6904 if (valid
& ATTR_SIZE
)
6905 yaffs_ResizeFile(obj
, attr
->ia_size
);
6907 yaffs_UpdateObjectHeader(obj
, NULL
, 1, 0, 0);
6912 int yaffs_GetAttributes(yaffs_Object
* obj
, struct iattr
*attr
)
6914 unsigned int valid
= 0;
6916 attr
->ia_mode
= obj
->yst_mode
;
6918 attr
->ia_uid
= obj
->yst_uid
;
6920 attr
->ia_gid
= obj
->yst_gid
;
6923 Y_TIME_CONVERT(attr
->ia_atime
) = obj
->yst_atime
;
6924 valid
|= ATTR_ATIME
;
6925 Y_TIME_CONVERT(attr
->ia_ctime
) = obj
->yst_ctime
;
6926 valid
|= ATTR_CTIME
;
6927 Y_TIME_CONVERT(attr
->ia_mtime
) = obj
->yst_mtime
;
6928 valid
|= ATTR_MTIME
;
6930 attr
->ia_size
= yaffs_GetFileSize(obj
);
6933 attr
->ia_valid
= valid
;
6942 int yaffs_DumpObject(yaffs_Object
* obj
)
6946 yaffs_GetObjectName(obj
, name
, 256);
6948 T(YAFFS_TRACE_ALWAYS
,
6950 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
6951 " chunk %d type %d size %d\n"
6952 TENDSTR
), obj
->objectId
, yaffs_GetObjectInode(obj
), name
,
6953 obj
->dirty
, obj
->valid
, obj
->serial
, obj
->sum
, obj
->chunkId
,
6954 yaffs_GetObjectType(obj
), yaffs_GetObjectFileLength(obj
)));
6960 /*---------------------------- Initialisation code -------------------------------------- */
6962 static int yaffs_CheckDevFunctions(const yaffs_Device
* dev
)
6965 /* Common functions, gotta have */
6966 if (!dev
->eraseBlockInNAND
|| !dev
->initialiseNAND
)
6969 #ifdef CONFIG_YAFFS_YAFFS2
6971 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
6972 if (dev
->writeChunkWithTagsToNAND
&&
6973 dev
->readChunkWithTagsFromNAND
&&
6974 !dev
->writeChunkToNAND
&&
6975 !dev
->readChunkFromNAND
&&
6976 dev
->markNANDBlockBad
&& dev
->queryNANDBlock
)
6980 /* Can use the "spare" style interface for yaffs1 */
6981 if (!dev
->isYaffs2
&&
6982 !dev
->writeChunkWithTagsToNAND
&&
6983 !dev
->readChunkWithTagsFromNAND
&&
6984 dev
->writeChunkToNAND
&&
6985 dev
->readChunkFromNAND
&&
6986 !dev
->markNANDBlockBad
&& !dev
->queryNANDBlock
)
6993 static int yaffs_CreateInitialDirectories(yaffs_Device
*dev
)
6995 /* Initialise the unlinked, deleted, root and lost and found directories */
6997 dev
->lostNFoundDir
= dev
->rootDir
= NULL
;
6998 dev
->unlinkedDir
= dev
->deletedDir
= NULL
;
7001 yaffs_CreateFakeDirectory(dev
, YAFFS_OBJECTID_UNLINKED
, S_IFDIR
);
7004 yaffs_CreateFakeDirectory(dev
, YAFFS_OBJECTID_DELETED
, S_IFDIR
);
7007 yaffs_CreateFakeDirectory(dev
, YAFFS_OBJECTID_ROOT
,
7008 YAFFS_ROOT_MODE
| S_IFDIR
);
7009 dev
->lostNFoundDir
=
7010 yaffs_CreateFakeDirectory(dev
, YAFFS_OBJECTID_LOSTNFOUND
,
7011 YAFFS_LOSTNFOUND_MODE
| S_IFDIR
);
7013 if(dev
->lostNFoundDir
&& dev
->rootDir
&& dev
->unlinkedDir
&& dev
->deletedDir
){
7014 yaffs_AddObjectToDirectory(dev
->rootDir
, dev
->lostNFoundDir
);
7021 int yaffs_GutsInitialise(yaffs_Device
* dev
)
7023 int init_failed
= 0;
7027 T(YAFFS_TRACE_TRACING
, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR
)));
7029 /* Check stuff that must be set */
7032 T(YAFFS_TRACE_ALWAYS
, (TSTR("yaffs: Need a device" TENDSTR
)));
7036 dev
->internalStartBlock
= dev
->startBlock
;
7037 dev
->internalEndBlock
= dev
->endBlock
;
7038 dev
->blockOffset
= 0;
7039 dev
->chunkOffset
= 0;
7040 dev
->nFreeChunks
= 0;
7042 if (dev
->startBlock
== 0) {
7043 dev
->internalStartBlock
= dev
->startBlock
+ 1;
7044 dev
->internalEndBlock
= dev
->endBlock
+ 1;
7045 dev
->blockOffset
= 1;
7046 dev
->chunkOffset
= dev
->nChunksPerBlock
;
7049 /* Check geometry parameters. */
7051 if ((dev
->isYaffs2
&& dev
->nDataBytesPerChunk
< 1024) ||
7052 (!dev
->isYaffs2
&& dev
->nDataBytesPerChunk
!= 512) ||
7053 dev
->nChunksPerBlock
< 2 ||
7054 dev
->nReservedBlocks
< 2 ||
7055 dev
->internalStartBlock
<= 0 ||
7056 dev
->internalEndBlock
<= 0 ||
7057 dev
->internalEndBlock
<= (dev
->internalStartBlock
+ dev
->nReservedBlocks
+ 2) // otherwise it is too small
7059 T(YAFFS_TRACE_ALWAYS
,
7061 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s "
7062 TENDSTR
), dev
->nDataBytesPerChunk
, dev
->isYaffs2
? "2" : ""));
7066 if (yaffs_InitialiseNAND(dev
) != YAFFS_OK
) {
7067 T(YAFFS_TRACE_ALWAYS
,
7068 (TSTR("yaffs: InitialiseNAND failed" TENDSTR
)));
7072 /* Got the right mix of functions? */
7073 if (!yaffs_CheckDevFunctions(dev
)) {
7074 /* Function missing */
7075 T(YAFFS_TRACE_ALWAYS
,
7077 ("yaffs: device function(s) missing or wrong\n" TENDSTR
)));
7082 /* This is really a compilation check. */
7083 if (!yaffs_CheckStructures()) {
7084 T(YAFFS_TRACE_ALWAYS
,
7085 (TSTR("yaffs_CheckStructures failed\n" TENDSTR
)));
7089 if (dev
->isMounted
) {
7090 T(YAFFS_TRACE_ALWAYS
,
7091 (TSTR("yaffs: device already mounted\n" TENDSTR
)));
7095 /* Finished with most checks. One or two more checks happen later on too. */
7101 /* OK now calculate a few things for the device */
7104 * Calculate all the chunk size manipulation numbers:
7106 /* Start off assuming it is a power of 2 */
7107 dev
->chunkShift
= ShiftDiv(dev
->nDataBytesPerChunk
);
7108 dev
->chunkMask
= (1<<dev
->chunkShift
) - 1;
7110 if(dev
->nDataBytesPerChunk
== (dev
->chunkMask
+ 1)){
7111 /* Yes it is a power of 2, disable crumbs */
7113 dev
->crumbShift
= 0;
7114 dev
->crumbsPerChunk
= 0;
7116 /* Not a power of 2, use crumbs instead */
7117 dev
->crumbShift
= ShiftDiv(sizeof(yaffs_PackedTags2TagsPart
));
7118 dev
->crumbMask
= (1<<dev
->crumbShift
)-1;
7119 dev
->crumbsPerChunk
= dev
->nDataBytesPerChunk
/(1 << dev
->crumbShift
);
7120 dev
->chunkShift
= 0;
7126 * Calculate chunkGroupBits.
7127 * We need to find the next power of 2 > than internalEndBlock
7130 x
= dev
->nChunksPerBlock
* (dev
->internalEndBlock
+ 1);
7134 /* Set up tnode width if wide tnodes are enabled. */
7135 if(!dev
->wideTnodesDisabled
){
7136 /* bits must be even so that we end up with 32-bit words */
7140 dev
->tnodeWidth
= 16;
7142 dev
->tnodeWidth
= bits
;
7145 dev
->tnodeWidth
= 16;
7147 dev
->tnodeMask
= (1<<dev
->tnodeWidth
)-1;
7149 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7150 * so if the bitwidth of the
7151 * chunk range we're using is greater than 16 we need
7152 * to figure out chunk shift and chunkGroupSize
7155 if (bits
<= dev
->tnodeWidth
)
7156 dev
->chunkGroupBits
= 0;
7158 dev
->chunkGroupBits
= bits
- dev
->tnodeWidth
;
7161 dev
->chunkGroupSize
= 1 << dev
->chunkGroupBits
;
7163 if (dev
->nChunksPerBlock
< dev
->chunkGroupSize
) {
7164 /* We have a problem because the soft delete won't work if
7165 * the chunk group size > chunks per block.
7166 * This can be remedied by using larger "virtual blocks".
7168 T(YAFFS_TRACE_ALWAYS
,
7169 (TSTR("yaffs: chunk group too large\n" TENDSTR
)));
7174 /* OK, we've finished verifying the device, lets continue with initialisation */
7176 /* More device initialisation */
7177 dev
->garbageCollections
= 0;
7178 dev
->passiveGarbageCollections
= 0;
7179 dev
->currentDirtyChecker
= 0;
7180 dev
->bufferedBlock
= -1;
7181 dev
->doingBufferedBlockRewrite
= 0;
7182 dev
->nDeletedFiles
= 0;
7183 dev
->nBackgroundDeletions
= 0;
7184 dev
->nUnlinkedFiles
= 0;
7186 dev
->eccUnfixed
= 0;
7187 dev
->tagsEccFixed
= 0;
7188 dev
->tagsEccUnfixed
= 0;
7189 dev
->nErasureFailures
= 0;
7190 dev
->nErasedBlocks
= 0;
7192 dev
->hasPendingPrioritisedGCs
= 1; /* Assume the worst for now, will get fixed on first GC */
7194 /* Initialise temporary buffers and caches. */
7195 if(!yaffs_InitialiseTempBuffers(dev
))
7198 dev
->srCache
= NULL
;
7199 dev
->gcCleanupList
= NULL
;
7203 dev
->nShortOpCaches
> 0) {
7206 int srCacheBytes
= dev
->nShortOpCaches
* sizeof(yaffs_ChunkCache
);
7208 if (dev
->nShortOpCaches
> YAFFS_MAX_SHORT_OP_CACHES
) {
7209 dev
->nShortOpCaches
= YAFFS_MAX_SHORT_OP_CACHES
;
7212 buf
= dev
->srCache
= YMALLOC(srCacheBytes
);
7215 memset(dev
->srCache
,0,srCacheBytes
);
7217 for (i
= 0; i
< dev
->nShortOpCaches
&& buf
; i
++) {
7218 dev
->srCache
[i
].object
= NULL
;
7219 dev
->srCache
[i
].lastUse
= 0;
7220 dev
->srCache
[i
].dirty
= 0;
7221 dev
->srCache
[i
].data
= buf
= YMALLOC_DMA(dev
->nDataBytesPerChunk
);
7232 dev
->gcCleanupList
= YMALLOC(dev
->nChunksPerBlock
* sizeof(__u32
));
7233 if(!dev
->gcCleanupList
)
7237 if (dev
->isYaffs2
) {
7238 dev
->useHeaderFileSize
= 1;
7240 if(!init_failed
&& !yaffs_InitialiseBlocks(dev
))
7243 yaffs_InitialiseTnodes(dev
);
7244 yaffs_InitialiseObjects(dev
);
7246 if(!init_failed
&& !yaffs_CreateInitialDirectories(dev
))
7251 /* Now scan the flash. */
7252 if (dev
->isYaffs2
) {
7253 if(yaffs_CheckpointRestore(dev
)) {
7254 T(YAFFS_TRACE_ALWAYS
,
7255 (TSTR("yaffs: restored from checkpoint" TENDSTR
)));
7258 /* Clean up the mess caused by an aborted checkpoint load
7259 * and scan backwards.
7261 yaffs_DeinitialiseBlocks(dev
);
7262 yaffs_DeinitialiseTnodes(dev
);
7263 yaffs_DeinitialiseObjects(dev
);
7266 dev
->nErasedBlocks
= 0;
7267 dev
->nFreeChunks
= 0;
7268 dev
->allocationBlock
= -1;
7269 dev
->allocationPage
= -1;
7270 dev
->nDeletedFiles
= 0;
7271 dev
->nUnlinkedFiles
= 0;
7272 dev
->nBackgroundDeletions
= 0;
7273 dev
->oldestDirtySequence
= 0;
7275 if(!init_failed
&& !yaffs_InitialiseBlocks(dev
))
7278 yaffs_InitialiseTnodes(dev
);
7279 yaffs_InitialiseObjects(dev
);
7281 if(!init_failed
&& !yaffs_CreateInitialDirectories(dev
))
7284 if(!init_failed
&& !yaffs_ScanBackwards(dev
))
7288 if(!yaffs_Scan(dev
))
7293 /* Clean up the mess */
7294 T(YAFFS_TRACE_TRACING
,
7295 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR
)));
7297 yaffs_Deinitialise(dev
);
7301 /* Zero out stats */
7302 dev
->nPageReads
= 0;
7303 dev
->nPageWrites
= 0;
7304 dev
->nBlockErasures
= 0;
7306 dev
->nRetriedWrites
= 0;
7308 dev
->nRetiredBlocks
= 0;
7310 yaffs_VerifyFreeChunks(dev
);
7311 yaffs_VerifyBlocks(dev
);
7314 T(YAFFS_TRACE_TRACING
,
7315 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR
)));
7320 void yaffs_Deinitialise(yaffs_Device
* dev
)
7322 if (dev
->isMounted
) {
7325 yaffs_DeinitialiseBlocks(dev
);
7326 yaffs_DeinitialiseTnodes(dev
);
7327 yaffs_DeinitialiseObjects(dev
);
7328 if (dev
->nShortOpCaches
> 0 &&
7331 for (i
= 0; i
< dev
->nShortOpCaches
; i
++) {
7332 if(dev
->srCache
[i
].data
)
7333 YFREE(dev
->srCache
[i
].data
);
7334 dev
->srCache
[i
].data
= NULL
;
7337 YFREE(dev
->srCache
);
7338 dev
->srCache
= NULL
;
7341 YFREE(dev
->gcCleanupList
);
7343 for (i
= 0; i
< YAFFS_N_TEMP_BUFFERS
; i
++) {
7344 YFREE(dev
->tempBuffer
[i
].buffer
);
7352 static int yaffs_CountFreeChunks(yaffs_Device
* dev
)
7357 yaffs_BlockInfo
*blk
;
7359 for (nFree
= 0, b
= dev
->internalStartBlock
; b
<= dev
->internalEndBlock
;
7361 blk
= yaffs_GetBlockInfo(dev
, b
);
7363 switch (blk
->blockState
) {
7364 case YAFFS_BLOCK_STATE_EMPTY
:
7365 case YAFFS_BLOCK_STATE_ALLOCATING
:
7366 case YAFFS_BLOCK_STATE_COLLECTING
:
7367 case YAFFS_BLOCK_STATE_FULL
:
7369 (dev
->nChunksPerBlock
- blk
->pagesInUse
+
7370 blk
->softDeletions
);
7381 int yaffs_GetNumberOfFreeChunks(yaffs_Device
* dev
)
7383 /* This is what we report to the outside world */
7386 int nDirtyCacheChunks
;
7387 int blocksForCheckpoint
;
7390 nFree
= dev
->nFreeChunks
;
7392 nFree
= yaffs_CountFreeChunks(dev
);
7395 nFree
+= dev
->nDeletedFiles
;
7397 /* Now count the number of dirty chunks in the cache and subtract those */
7401 for (nDirtyCacheChunks
= 0, i
= 0; i
< dev
->nShortOpCaches
; i
++) {
7402 if (dev
->srCache
[i
].dirty
)
7403 nDirtyCacheChunks
++;
7407 nFree
-= nDirtyCacheChunks
;
7409 nFree
-= ((dev
->nReservedBlocks
+ 1) * dev
->nChunksPerBlock
);
7411 /* Now we figure out how much to reserve for the checkpoint and report that... */
7412 blocksForCheckpoint
= dev
->nCheckpointReservedBlocks
- dev
->blocksInCheckpoint
;
7413 if(blocksForCheckpoint
< 0)
7414 blocksForCheckpoint
= 0;
7416 nFree
-= (blocksForCheckpoint
* dev
->nChunksPerBlock
);
7425 static int yaffs_freeVerificationFailures
;
7427 static void yaffs_VerifyFreeChunks(yaffs_Device
* dev
)
7432 if(yaffs_SkipVerification(dev
))
7435 counted
= yaffs_CountFreeChunks(dev
);
7437 difference
= dev
->nFreeChunks
- counted
;
7440 T(YAFFS_TRACE_ALWAYS
,
7441 (TSTR("Freechunks verification failure %d %d %d" TENDSTR
),
7442 dev
->nFreeChunks
, counted
, difference
));
7443 yaffs_freeVerificationFailures
++;
7447 /*---------------------------------------- YAFFS test code ----------------------*/
7449 #define yaffs_CheckStruct(structure,syze, name) \
7450 if(sizeof(structure) != syze) \
7452 T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
7453 name,syze,sizeof(structure))); \
7454 return YAFFS_FAIL; \
7457 static int yaffs_CheckStructures(void)
7459 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */
7460 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */
7461 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */
7462 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7463 yaffs_CheckStruct(yaffs_Tnode
, 2 * YAFFS_NTNODES_LEVEL0
, "yaffs_Tnode")
7465 yaffs_CheckStruct(yaffs_ObjectHeader
, 512, "yaffs_ObjectHeader")