X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.h;h=0c608fdfd94dcb36bd9fa386304c80ed6573a52d;hp=253ee9bf0df797cef0f3a3a2b6731190e2abc13c;hb=9f361d87ca8c3d331ed1a4ffea53dd9a8d55ee88;hpb=b75aa4dfb6f0a2a92c4b0378c348c82480dea06e diff --git a/yaffs_guts.h b/yaffs_guts.h index 253ee9b..0c608fd 100644 --- a/yaffs_guts.h +++ b/yaffs_guts.h @@ -14,7 +14,7 @@ * * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. * - * $Id: yaffs_guts.h,v 1.7 2005-07-06 00:36:32 charles Exp $ + * $Id: yaffs_guts.h,v 1.12 2005-08-11 00:34:14 charles Exp $ */ #ifndef __YAFFS_GUTS_H__ @@ -31,7 +31,7 @@ // Give us an FF=0xFF // Give us an S=0x53 // And what have we got... -#define YAFFS_MAGIC 0x5941FF53 +#define YAFFS_MAGIC 0x5941FF53 #define YAFFS_NTNODES_LEVEL0 16 #define YAFFS_TNODES_LEVEL0_BITS 4 @@ -53,7 +53,7 @@ #define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 #define YAFFS_MIN_YAFFS2_SPARE_SIZE 32 -#define YAFFS_MAX_CHUNK_ID 0x000FFFFF +#define YAFFS_MAX_CHUNK_ID 0x000FFFFF #define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF @@ -63,8 +63,7 @@ #define YAFFS_NOBJECT_BUCKETS 256 - -#define YAFFS_OBJECT_SPACE 0x40000 +#define YAFFS_OBJECT_SPACE 0x40000 #ifdef CONFIG_YAFFS_UNICODE #define YAFFS_MAX_NAME_LENGTH 127 @@ -76,8 +75,8 @@ #define YAFFS_SHORT_NAME_LENGTH 15 - -#define YAFFS_OBJECTID_ROOT 1 +// Some special object ids +#define YAFFS_OBJECTID_ROOT 1 #define YAFFS_OBJECTID_LOSTNFOUND 2 #define YAFFS_OBJECTID_UNLINKED 3 #define YAFFS_OBJECTID_DELETED 4 @@ -96,16 +95,14 @@ #define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000 #define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00 - // ChunkCache is used for short read/write operations. -typedef struct -{ +typedef struct { struct yaffs_ObjectStruct *object; int chunkId; int lastUse; - int dirty; - int nBytes; // Only valid if the cache is dirty - int locked; // Can't push out or flush while locked.. + int dirty; + int nBytes; // Only valid if the cache is dirty + int locked; // Can't push out or flush while locked.. #ifdef CONFIG_YAFFS_YAFFS2 __u8 *data; #else @@ -113,41 +110,36 @@ typedef struct #endif } yaffs_ChunkCache; - #ifndef CONFIG_YAFFS_NO_YAFFS1 // Tags structures in RAM // NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise // the structure size will get blown out. -typedef struct -{ +typedef struct { unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; - unsigned ecc:12; - unsigned unusedStuff:2; + unsigned serialNumber:2; + unsigned byteCount:10; + unsigned objectId:18; + unsigned ecc:12; + unsigned unusedStuff:2; } yaffs_Tags; -typedef union -{ - yaffs_Tags asTags; - __u8 asBytes[8]; +typedef union { + yaffs_Tags asTags; + __u8 asBytes[8]; } yaffs_TagsUnion; #endif -typedef enum -{ +typedef enum { YAFFS_ECC_RESULT_UNKNOWN, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_ECC_RESULT_FIXED, YAFFS_ECC_RESULT_UNFIXED } yaffs_ECCResult; -typedef enum -{ +typedef enum { YAFFS_OBJECT_TYPE_UNKNOWN, YAFFS_OBJECT_TYPE_FILE, YAFFS_OBJECT_TYPE_SYMLINK, @@ -156,196 +148,186 @@ typedef enum YAFFS_OBJECT_TYPE_SPECIAL } yaffs_ObjectType; - -typedef struct -{ +typedef struct { unsigned validMarker0; - unsigned chunkUsed; // Status of the chunk: used or unused - unsigned objectId; // If 0 then this is not part of an object (unused) - unsigned chunkId; // If 0 then this is a header, else a data chunk - unsigned byteCount; // Only valid for data chunks - - + unsigned chunkUsed; // Status of the chunk: used or unused + unsigned objectId; // If 0 then this is not part of an object (unused) + unsigned chunkId; // If 0 then this is a header, else a data chunk + unsigned byteCount; // Only valid for data chunks + // The following stuff only has meaning when we read - yaffs_ECCResult eccResult; // Only valid when we read. - unsigned blockBad; // Only valid on reading + yaffs_ECCResult eccResult; // Only valid when we read. + unsigned blockBad; // Only valid on reading + + // YAFFS 1 stuff + unsigned chunkDeleted; // The chunk is marked deleted + unsigned serialNumber; // Yaffs1 2-bit serial number - // YAFFS 1 stuff - unsigned chunkDeleted; // The chunk is marked deleted - unsigned serialNumber; // Yaffs1 2-bit serial number - // YAFFS2 stuff - unsigned sequenceNumber; // The sequence number of this block + unsigned sequenceNumber; // The sequence number of this block // Extra info if this is an object header (YAFFS2 only) - unsigned extraHeaderInfoAvailable; - unsigned extraParentObjectId; - unsigned extraIsShrinkHeader; - - yaffs_ObjectType extraObjectType; - unsigned extraFileLength; - unsigned extraEquivalentObjectId; + unsigned extraHeaderInfoAvailable; // There is extra info available if this is not zero + unsigned extraParentObjectId; // The parent object + unsigned extraIsShrinkHeader; // Is it a shrink header? + unsigned extraShadows; // Does this shadow another object? + + yaffs_ObjectType extraObjectType; // What object type? + + unsigned extraFileLength; // Length if it is a file + unsigned extraEquivalentObjectId; // Equivalent object Id if it is a hard link unsigned validMarker1; - + } yaffs_ExtendedTags; -#ifndef CONFIG_YAFFS_NO_YAFFS1 // Spare structure -typedef struct -{ - __u8 tagByte0; - __u8 tagByte1; - __u8 tagByte2; - __u8 tagByte3; - __u8 pageStatus; // set to 0 to delete the chunk - __u8 blockStatus; - __u8 tagByte4; - __u8 tagByte5; - __u8 ecc1[3]; - __u8 tagByte6; - __u8 tagByte7; - __u8 ecc2[3]; +typedef struct { + __u8 tagByte0; + __u8 tagByte1; + __u8 tagByte2; + __u8 tagByte3; + __u8 pageStatus; // set to 0 to delete the chunk + __u8 blockStatus; + __u8 tagByte4; + __u8 tagByte5; + __u8 ecc1[3]; + __u8 tagByte6; + __u8 tagByte7; + __u8 ecc2[3]; } yaffs_Spare; //Special structure for passing through to mtd struct yaffs_NANDSpare { - yaffs_Spare spare; - int eccres1; - int eccres2; + yaffs_Spare spare; + int eccres1; + int eccres2; }; -#endif - // Block data in RAM typedef enum { - YAFFS_BLOCK_STATE_UNKNOWN = 0, + YAFFS_BLOCK_STATE_UNKNOWN = 0, YAFFS_BLOCK_STATE_SCANNING, - YAFFS_BLOCK_STATE_NEEDS_SCANNING,// The block might have something on it (ie it is allocating or full, perhaps empty) - // but it needs to be scanned to determine its true state. - // This state is only valid during yaffs_Scan. - // NB We tolerate empty because the pre-scanner might be incapable of deciding - // However, if this state is returned on a YAFFS2 device, then we expect a sequence number - - YAFFS_BLOCK_STATE_EMPTY, // This block is empty - - YAFFS_BLOCK_STATE_ALLOCATING, // This block is partially allocated. - // This is the one currently being used for page - // allocation. Should never be more than one of these - - - YAFFS_BLOCK_STATE_FULL, // All the pages in this block have been allocated. - // At least one page holds valid data. - - YAFFS_BLOCK_STATE_DIRTY, // All pages have been allocated and deleted. - // Erase me, reuse me. - - YAFFS_BLOCK_STATE_COLLECTING, // This block is being garbage collected - - YAFFS_BLOCK_STATE_DEAD // This block has failed and is not in use - + YAFFS_BLOCK_STATE_NEEDS_SCANNING, + // The block might have something on it (ie it is allocating or full, perhaps empty) + // but it needs to be scanned to determine its true state. + // This state is only valid during yaffs_Scan. + // NB We tolerate empty because the pre-scanner might be incapable of deciding + // However, if this state is returned on a YAFFS2 device, then we expect a sequence number + + YAFFS_BLOCK_STATE_EMPTY, + // This block is empty + + YAFFS_BLOCK_STATE_ALLOCATING, + // This block is partially allocated. + // This is the one currently being used for page + // allocation. Should never be more than one of these + + YAFFS_BLOCK_STATE_FULL, + // All the pages in this block have been allocated. + // At least one page holds valid data. + + YAFFS_BLOCK_STATE_DIRTY, + // All pages have been allocated and deleted. + // Erase me, reuse me. + + YAFFS_BLOCK_STATE_COLLECTING, + // This block is being garbage collected + + YAFFS_BLOCK_STATE_DEAD + // This block has failed and is not in use } yaffs_BlockState; +typedef struct { - - -typedef struct -{ - - int softDeletions:12; // number of soft deleted pages - int pagesInUse:12; // number of pages in use - yaffs_BlockState blockState:4; // One of the above block states - __u32 needsRetiring:1; // Data has failed on this block, need to get valid data off - // and retire the block. + int softDeletions:12; // number of soft deleted pages + int pagesInUse:12; // number of pages in use + yaffs_BlockState blockState:4; // One of the above block states + __u32 needsRetiring:1; // Data has failed on this block, need to get valid data off + // and retire the block. #ifdef CONFIG_YAFFS_YAFFS2 - __u32 hasShrinkHeader:1;// This block has at least one object header that does a shrink + __u32 hasShrinkHeader:1; // This block has at least one object header that does a shrink __u32 sequenceNumber; // block sequence number for yaffs2 #endif } yaffs_BlockInfo; - //////////////////// Object structure /////////////////////////// // This is the object structure as stored on NAND -typedef struct -{ +typedef struct { yaffs_ObjectType type; - // Apply to everything - int parentObjectId; + // Apply to everything + int parentObjectId; __u16 sum__NoLongerUsed; // checksum of name. Calc this off the name to prevent inconsistencies - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; + YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; // Thes following apply to directories, files, symlinks - not hard links - __u32 st_mode; // protection + __u32 yst_mode; // protection #ifdef CONFIG_YAFFS_WINCE __u32 notForWinCE[5]; #else - __u32 st_uid; // user ID of owner - __u32 st_gid; // group ID of owner - __u32 st_atime; // time of last access - __u32 st_mtime; // time of last modification - __u32 st_ctime; // time of last change + __u32 yst_uid; // user ID of owner + __u32 yst_gid; // group ID of owner + __u32 yst_atime; // time of last access + __u32 yst_mtime; // time of last modification + __u32 yst_ctime; // time of last change #endif // File size applies to files only - int fileSize; - + int fileSize; + // Equivalent object id applies to hard links only. - int equivalentObjectId; - + int equivalentObjectId; + // Alias is for symlinks only. YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - - __u32 st_rdev; // device stuff for block and char devices (maj/min) - + + __u32 yst_rdev; // device stuff for block and char devices (maj/min) + #ifdef CONFIG_YAFFS_WINCE __u32 win_ctime[2]; __u32 win_atime[2]; __u32 win_mtime[2]; - __u32 roomToGrow[5]; + __u32 roomToGrow[4]; #else - __u32 roomToGrow[11]; + __u32 roomToGrow[10]; #endif - // isShrink applies to bject headers written when we shrink the file (ie resize) - __u32 isShrink; - -} yaffs_ObjectHeader; + int shadowsObject; // This object header shadows the specified object if not > 0 + // isShrink applies to object headers written when we shrink the file (ie resize) + __u32 isShrink; +} yaffs_ObjectHeader; //////////////////// Tnode /////////////////////////// -union yaffs_Tnode_union -{ +union yaffs_Tnode_union { #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL+1]; + union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1]; #else union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL]; #endif __u16 level0[YAFFS_NTNODES_LEVEL0]; - + }; typedef union yaffs_Tnode_union yaffs_Tnode; -struct yaffs_TnodeList_struct -{ +struct yaffs_TnodeList_struct { struct yaffs_TnodeList_struct *next; yaffs_Tnode *tnodes; }; typedef struct yaffs_TnodeList_struct yaffs_TnodeList; - - /////////////////// Object //////////////////////////////// // An object can be one of: // - a directory (no data, has children links @@ -353,89 +335,78 @@ typedef struct yaffs_TnodeList_struct yaffs_TnodeList; // - a symlink [symbolic link] (the alias). // - a hard link - -typedef struct -{ +typedef struct { __u32 fileSize; __u32 scannedFileSize; __u32 shrinkSize; - int topLevel; + int topLevel; yaffs_Tnode *top; } yaffs_FileStructure; -typedef struct -{ - struct list_head children; // list of child links +typedef struct { + struct list_head children; // list of child links } yaffs_DirectoryStructure; -typedef struct -{ +typedef struct { YCHAR *alias; } yaffs_SymLinkStructure; -typedef struct -{ +typedef struct { struct yaffs_ObjectStruct *equivalentObject; - __u32 equivalentObjectId; + __u32 equivalentObjectId; } yaffs_HardLinkStructure; -typedef union -{ +typedef union { yaffs_FileStructure fileVariant; yaffs_DirectoryStructure directoryVariant; yaffs_SymLinkStructure symLinkVariant; yaffs_HardLinkStructure hardLinkVariant; } yaffs_ObjectVariant; - -struct yaffs_ObjectStruct -{ - __u8 deleted: 1; // This should only apply to unlinked files. - __u8 softDeleted: 1; // it has also been soft deleted - __u8 unlinked: 1; // An unlinked file. The file should be in the unlinked pseudo directory. - __u8 fake:1; // A fake object has no presence on NAND. - __u8 renameAllowed:1; // Some objects are not allowed to be renamed. +struct yaffs_ObjectStruct { + __u8 deleted:1; // This should only apply to unlinked files. + __u8 softDeleted:1; // it has also been soft deleted + __u8 unlinked:1; // An unlinked file. The file should be in the unlinked pseudo directory. + __u8 fake:1; // A fake object has no presence on NAND. + __u8 renameAllowed:1; // Some objects are not allowed to be renamed. __u8 unlinkAllowed:1; - __u8 dirty:1; // the object needs to be written to flash - __u8 valid:1; // When the file system is being loaded up, this - // object might be created before the data - // is available (ie. file data records appear before the header). - __u8 serial; // serial number of chunk in NAND. Store here so we don't have to - - __u8 deferedFree: 1; // For Linux kernel. Object is removed from NAND, but still in the inode cache. - // Free of object is defered. - - __u8 lazyLoaded; // Vital info has been loaded from tags. Not all info available. - // - - // read back the old one to update. - __u16 sum; // sum of the name to speed searching - - struct yaffs_DeviceStruct *myDev; // The device I'm on - - + __u8 dirty:1; // the object needs to be written to flash + __u8 valid:1; // When the file system is being loaded up, this + // object might be created before the data + // is available (ie. file data records appear before the header). + __u8 serial; // serial number of chunk in NAND. Store here so we don't have to + + __u8 deferedFree:1; // For Linux kernel. Object is removed from NAND, but still in the inode cache. + // Free of object is defered. + + __u8 lazyLoaded; // Vital info has been loaded from tags. Not all info available. + // + + // read back the old one to update. + __u16 sum; // sum of the name to speed searching + + struct yaffs_DeviceStruct *myDev; // The device I'm on + struct list_head hashLink; // list of objects in this hash bucket - - struct list_head hardLinks; // all the equivalent hard linked objects - // live on this list + struct list_head hardLinks; // all the equivalent hard linked objects + // live on this list // directory structure stuff - struct yaffs_ObjectStruct *parent; //my parent directory + struct yaffs_ObjectStruct *parent; //my parent directory struct list_head siblings; // siblings in a directory - // also used for linking up the free list - + // also used for linking up the free list + // Where's my object header in NAND? int chunkId; // where it lives - int nDataChunks; // Number of data chunks attached to the file. - + int nDataChunks; // Number of data chunks attached to the file. + __u32 objectId; // the object id value - - - __u32 st_mode; // protection + + __u32 yst_mode; // protection #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - YCHAR shortName[YAFFS_SHORT_NAME_LENGTH+1]; + YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1]; #endif #ifndef __KERNEL__ @@ -447,45 +418,36 @@ struct yaffs_ObjectStruct __u32 win_mtime[2]; __u32 win_atime[2]; #else - __u32 st_uid; // user ID of owner - __u32 st_gid; // group ID of owner - __u32 st_atime; // time of last access - __u32 st_mtime; // time of last modification - __u32 st_ctime; // time of last change + __u32 yst_uid; // user ID of owner + __u32 yst_gid; // group ID of owner + __u32 yst_atime; // time of last access + __u32 yst_mtime; // time of last modification + __u32 yst_ctime; // time of last change #endif - __u32 st_rdev; // device stuff for block and char devices - - + __u32 yst_rdev; // device stuff for block and char devices #ifdef __KERNEL__ struct inode *myInode; #endif - - yaffs_ObjectType variantType; - - yaffs_ObjectVariant variant; - -}; + yaffs_ObjectVariant variant; +}; typedef struct yaffs_ObjectStruct yaffs_Object; - -struct yaffs_ObjectList_struct -{ +struct yaffs_ObjectList_struct { yaffs_Object *objects; struct yaffs_ObjectList_struct *next; }; typedef struct yaffs_ObjectList_struct yaffs_ObjectList; -typedef struct -{ +typedef struct { struct list_head list; int count; } yaffs_ObjectBucket; @@ -496,107 +458,117 @@ typedef struct typedef struct { __u8 *buffer; - int line; // track from whence this buffer was allocated + int line; // track from whence this buffer was allocated int maxLine; } yaffs_TempBuffer; //////////////////// Device //////////////////////////////// -struct yaffs_DeviceStruct -{ +struct yaffs_DeviceStruct { + struct list_head devList; + const char *name; + // Entry parameters set up way early. Yaffs sets up the rest. - int nBytesPerChunk; // Should be a power of 2 >= 512 - int nChunksPerBlock; // does not need to be a power of 2 - int nBytesPerSpare; // spare area size - int startBlock; // Start block we're allowed to use - int endBlock; // End block we're allowed to use - int nReservedBlocks; // We want this tuneable so that we can reduce - // reserved blocks on NOR and RAM. - - int nShortOpCaches; // If <= 0, then short op caching is disabled, else - // the number of short op caches (don't use too many). - - int useHeaderFileSize; // Flag to determine if we should use file sizes from the header + int nBytesPerChunk; // Should be a power of 2 >= 512 + int nChunksPerBlock; // does not need to be a power of 2 + int nBytesPerSpare; // spare area size + int startBlock; // Start block we're allowed to use + int endBlock; // End block we're allowed to use + int nReservedBlocks; // We want this tuneable so that we can reduce + // reserved blocks on NOR and RAM. - int useNANDECC; // Flag to decide whether or not to use NANDECC - - - void *genericDevice; // Pointer to device context - // On an mtd this holds the mtd pointer. + int nShortOpCaches; // If <= 0, then short op caching is disabled, else + // the number of short op caches (don't use too many). + + int useHeaderFileSize; // Flag to determine if we should use file sizes from the header + + int useNANDECC; // Flag to decide whether or not to use NANDECC + + void *genericDevice; // Pointer to device context + // On an mtd this holds the mtd pointer. // NAND access functions (Must be set before calling YAFFS) - - int (*writeChunkToNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, const yaffs_Spare *spare); - int (*readChunkFromNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare); - int (*eraseBlockInNAND)(struct yaffs_DeviceStruct *dev,int blockInNAND); - int (*initialiseNAND)(struct yaffs_DeviceStruct *dev); + int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev, + int chunkInNAND, const __u8 * data, + const yaffs_Spare * spare); + int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev, + int chunkInNAND, __u8 * data, + yaffs_Spare * spare); + int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev, + int blockInNAND); + int (*initialiseNAND) (struct yaffs_DeviceStruct * dev); #ifdef CONFIG_YAFFS_YAFFS2 - int (*writeChunkWithTagsToNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags); - int (*readChunkWithTagsFromNAND)(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags); - int (*markNANDBlockBad)(struct yaffs_DeviceStruct *dev, int blockNo); - int (*queryNANDBlock)(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber); + int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev, + int chunkInNAND, const __u8 * data, + const yaffs_ExtendedTags * tags); + int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev, + int chunkInNAND, __u8 * data, + yaffs_ExtendedTags * tags); + int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo); + int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo, + yaffs_BlockState * state, int *sequenceNumber); #endif int isYaffs2; // End of stuff that must be set before initialisation. - + // Runtime parameters. Set up by YAFFS. - - __u16 chunkGroupBits; // 0 for devices <= 32MB. else log2(nchunks) - 16 - __u16 chunkGroupSize; // == 2^^chunkGroupBits - + + __u16 chunkGroupBits; // 0 for devices <= 32MB. else log2(nchunks) - 16 + __u16 chunkGroupSize; // == 2^^chunkGroupBits + #ifdef __KERNEL__ - struct semaphore sem;// Semaphore for waiting on erasure. - struct semaphore grossLock; // Gross locking semaphore - __u8 * spareBuffer; // For mtdif2 use. Don't know the size of the buffer at compile time so we have to allocate it. - void (*putSuperFunc)(struct super_block *sb); + struct semaphore sem; // Semaphore for waiting on erasure. + struct semaphore grossLock; // Gross locking semaphore + __u8 *spareBuffer; // For mtdif2 use. Don't know the size of the buffer at compile time so we have to allocate it. + void (*putSuperFunc) (struct super_block * sb); #endif int isMounted; - + // Stuff to support block offsetting to support start block zero int internalStartBlock; int internalEndBlock; int blockOffset; int chunkOffset; - + // Block Info yaffs_BlockInfo *blockInfo; - __u8 *chunkBits; // bitmap of chunks in use - int chunkBitmapStride; // Number of bytes of chunkBits per block. - // Must be consistent with nChunksPerBlock. - + __u8 *chunkBits; // bitmap of chunks in use + int chunkBitmapStride; // Number of bytes of chunkBits per block. + // Must be consistent with nChunksPerBlock. - int nErasedBlocks; - int allocationBlock; // Current block being allocated off + int nErasedBlocks; + int allocationBlock; // Current block being allocated off __u32 allocationPage; - int allocationBlockFinder; // Used to search for next allocation block - + int allocationBlockFinder; // Used to search for next allocation block + // Runtime state - int nTnodesCreated; + int nTnodesCreated; yaffs_Tnode *freeTnodes; - int nFreeTnodes; + int nFreeTnodes; yaffs_TnodeList *allocatedTnodeList; + int isDoingGC; - int nObjectsCreated; + int nObjectsCreated; yaffs_Object *freeObjects; - int nFreeObjects; + int nFreeObjects; yaffs_ObjectList *allocatedObjectList; yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS]; - int nFreeChunks; - - int currentDirtyChecker; // Used to find current dirtiest block - - __u32 *gcCleanupList; // objects to delete at the end of a GC. - + int nFreeChunks; + + int currentDirtyChecker; // Used to find current dirtiest block + + __u32 *gcCleanupList; // objects to delete at the end of a GC. + // Operations since mount int nPageWrites; int nPageReads; @@ -613,13 +585,14 @@ struct yaffs_DeviceStruct int tagsEccUnfixed; int nDeletions; int nUnmarkedDeletions; - + yaffs_Object *rootDir; yaffs_Object *lostNFoundDir; + + // Buffer areas for storing data to recover from write failures TODO + // __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; + // yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; - // Buffer areas for storing data to recover from write failures -// __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; -// yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; int bufferedBlock; // Which block is buffered here? int doingBufferedBlockRewrite; @@ -629,123 +602,124 @@ struct yaffs_DeviceStruct int cacheHits; // Stuff for background deletion and unlinked files. - yaffs_Object *unlinkedDir; // Directory where unlinked and deleted files live. - yaffs_Object *deletedDir; // Directory where deleted objects are sent to disappear. + yaffs_Object *unlinkedDir; // Directory where unlinked and deleted files live. + yaffs_Object *deletedDir; // Directory where deleted objects are sent to disappear. yaffs_Object *unlinkedDeletion; // Current file being background deleted. - int nDeletedFiles; // Count of files awaiting deletion; - int nUnlinkedFiles; // Count of unlinked files. - int nBackgroundDeletions; // Count of background deletions. - + int nDeletedFiles; // Count of files awaiting deletion; + int nUnlinkedFiles; // Count of unlinked files. + int nBackgroundDeletions; // Count of background deletions. + //__u8 *localBuffer; - + yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS]; int maxTemp; int unmanagedTempAllocations; int unmanagedTempDeallocations; - + // yaffs2 runtime stuff - unsigned sequenceNumber; //Sequence number of currently allocating block + unsigned sequenceNumber; //Sequence number of currently allocating block unsigned oldestDirtySequence; - + }; typedef struct yaffs_DeviceStruct yaffs_Device; - // Function to manipulate block info -static Y_INLINE yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk) +static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk) { - if(blk < dev->internalStartBlock || blk > dev->internalEndBlock) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),blk)); + if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR), + blk)); YBUG(); } return &dev->blockInfo[blk - dev->internalStartBlock]; } - //////////// YAFFS Functions ////////////////// -int yaffs_GutsInitialise(yaffs_Device *dev); -void yaffs_Deinitialise(yaffs_Device *dev); - -int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev); +int yaffs_GutsInitialise(yaffs_Device * dev); +void yaffs_Deinitialise(yaffs_Device * dev); +int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev); // Rename -int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object *newDir, const YCHAR *newName); +int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, + yaffs_Object * newDir, const YCHAR * newName); // generic Object functions -int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name); -int yaffs_DeleteFile(yaffs_Object *obj); +int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name); +int yaffs_DeleteFile(yaffs_Object * obj); // Object access functions. -int yaffs_GetObjectName(yaffs_Object *obj,YCHAR *name,int buffSize); -int yaffs_GetObjectFileLength(yaffs_Object *obj); -int yaffs_GetObjectInode(yaffs_Object *obj); -unsigned yaffs_GetObjectType(yaffs_Object *obj); -int yaffs_GetObjectLinkCount(yaffs_Object *obj); +int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize); +int yaffs_GetObjectFileLength(yaffs_Object * obj); +int yaffs_GetObjectInode(yaffs_Object * obj); +unsigned yaffs_GetObjectType(yaffs_Object * obj); +int yaffs_GetObjectLinkCount(yaffs_Object * obj); // Change inode attributes -int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr); -int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr); +int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr); +int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr); // File operations -int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, __u32 offset, int nBytes); -int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, __u32 offset, int nBytes, int writeThrough); -int yaffs_ResizeFile(yaffs_Object *obj, int newSize); - -yaffs_Object *yaffs_MknodFile(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid); -int yaffs_FlushFile(yaffs_Object *obj,int updateTime); +int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, __u32 offset, + int nBytes); +int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, __u32 offset, + int nBytes, int writeThrough); +int yaffs_ResizeFile(yaffs_Object * obj, int newSize); +yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, + __u32 mode, __u32 uid, __u32 gid); +int yaffs_FlushFile(yaffs_Object * obj, int updateTime); // Directory operations -yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid); -yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir,const YCHAR *name); -int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *)); +yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, + __u32 mode, __u32 uid, __u32 gid); +yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name); +int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, + int (*fn) (yaffs_Object *)); -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number); +yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number); // Link operations -yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, yaffs_Object *equivalentObject); +yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, + yaffs_Object * equivalentObject); -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj); +yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj); // Symlink operations -yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, __u32 mode, __u32 uid, __u32 gid, const YCHAR *alias); -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj); +yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, + __u32 mode, __u32 uid, __u32 gid, + const YCHAR * alias); +YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj); // Special inodes (fifos, sockets and devices) -yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid,__u32 rdev); - +yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, + __u32 mode, __u32 uid, __u32 gid, __u32 rdev); // Special directories -yaffs_Object *yaffs_Root(yaffs_Device *dev); -yaffs_Object *yaffs_LostNFound(yaffs_Device *dev); +yaffs_Object *yaffs_Root(yaffs_Device * dev); +yaffs_Object *yaffs_LostNFound(yaffs_Device * dev); #ifdef CONFIG_YAFFS_WINCE // CONFIG_YAFFS_WINCE special stuff -void yfsd_WinFileTimeNow(__u32 target[2]); +void yfsd_WinFileTimeNow(__u32 target[2]); #endif #ifdef __KERNEL__ -void yaffs_HandleDeferedFree(yaffs_Object *obj); +void yaffs_HandleDeferedFree(yaffs_Object * obj); #endif - - - // Debug dump -int yaffs_DumpObject(yaffs_Object *obj); - +int yaffs_DumpObject(yaffs_Object * obj); -void yaffs_GutsTest(yaffs_Device *dev); +void yaffs_GutsTest(yaffs_Device * dev); - -void yaffs_InitialiseTags(yaffs_ExtendedTags *tags); -void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND,int lyn); -int yaffs_CheckFF(__u8 *buffer,int nBytes); +void yaffs_InitialiseTags(yaffs_ExtendedTags * tags); +void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn); +int yaffs_CheckFF(__u8 * buffer, int nBytes); #endif -