*
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
*
- * $Id: yaffs_guts.h,v 1.8 2005-07-18 23:16:04 charles Exp $
+ * $Id: yaffs_guts.h,v 1.12 2005-08-11 00:34:14 charles Exp $
*/
#ifndef __YAFFS_GUTS_H__
// 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
#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
#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
#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
#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
#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,
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; // There is extra info available if this is not zero
- unsigned extraParentObjectId; // The parent object
- unsigned extraIsShrinkHeader; // Is it a shrink header?
-
- 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 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;
- 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 yst_mode; // protection
+ __u32 yst_mode; // protection
#ifdef CONFIG_YAFFS_WINCE
__u32 notForWinCE[5];
#else
- __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
+ __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 yst_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
// - 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 yst_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__
__u32 win_mtime[2];
__u32 win_atime[2];
#else
- __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
+ __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 yst_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;
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;
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;
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
-
projects / yaffs2.git / blobdiff