#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
+/* Special sequence number for bad block that failed to be marked bad */
+#define YAFFS_SEQUENCE_BAD_BLOCK 0xFFFF0000
+
/* ChunkCache is used for short read/write operations.*/
typedef struct {
struct yaffs_ObjectStruct *object;
typedef struct {
unsigned chunkId:20;
unsigned serialNumber:2;
- unsigned byteCount:10;
+ unsigned byteCountLSB:10;
unsigned objectId:18;
unsigned ecc:12;
- unsigned unusedStuff:2;
-
+ unsigned byteCountMSB:2;
} yaffs_Tags;
typedef union {
int pagesInUse:10; /* number of pages in use */
unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
__u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
- /* and retire the block. */
- __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
- __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block.
+ /* and retire the block. */
+ __u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */
+ __u32 gcPrioritise:1; /* An ECC check or blank check has failed on this block.
It should be prioritised for GC */
- __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
+ __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
#ifdef CONFIG_YAFFS_YAFFS2
__u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
/* Apply to everything */
int parentObjectId;
- __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
+ __u16 sum__NoLongerUsed; /* checksum of name. No longer used */
YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
/* The following apply to directories, files, symlinks - not hard links */
- __u32 yst_mode; /* protection */
+ __u32 yst_mode; /* protection */
#ifdef CONFIG_YAFFS_WINCE
__u32 notForWinCE[5];
} yaffs_FileStructure;
typedef struct {
- struct ylist_head children; /* list of child links */
+ struct ylist_head children; /* list of child links */
} yaffs_DirectoryStructure;
typedef struct {
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 */
* still in the inode cache. Free of object is defered.
* until the inode is released.
*/
+ __u8 beingCreated:1; /* This object is still being created so skip some checks. */
+ __u8 isShadowed:1; /* This object is shadowed on the way to being renamed. */
__u8 serial; /* serial number of chunk in NAND. Cached here */
__u16 sum; /* sum of the name to speed searching */
- struct yaffs_DeviceStruct *myDev; /* The device I'm on */
+ struct yaffs_DeviceStruct *myDev; /* The device I'm on */
- struct ylist_head hashLink; /* list of objects in this hash bucket */
+ struct ylist_head hashLink; /* list of objects in this hash bucket */
- struct ylist_head hardLinks; /* all the equivalent hard linked objects */
+ struct ylist_head hardLinks; /* all the equivalent hard linked objects */
/* directory structure stuff */
/* also used for linking up the free list */
struct ylist_head siblings;
/* Where's my object header in NAND? */
- int chunkId;
+ int hdrChunk;
int nDataChunks; /* Number of data chunks attached to the file. */
YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
#endif
-#ifndef __KERNEL__
- __u32 inUse;
-#endif
-
#ifdef CONFIG_YAFFS_WINCE
__u32 win_ctime[2];
__u32 win_mtime[2];
__u32 yst_rdev;
-#ifdef __KERNEL__
- struct inode *myInode;
-
-#endif
+ void *myInode;
yaffs_ObjectType variantType;
*/
typedef struct {
- int structType;
+ int structType;
__u32 objectId;
__u32 parentId;
- int chunkId;
-
+ int hdrChunk;
yaffs_ObjectType variantType:3;
__u8 deleted:1;
__u8 softDeleted:1;
int nDataChunks;
__u32 fileSizeOrEquivalentObjectId;
-
-}yaffs_CheckpointObject;
+} yaffs_CheckpointObject;
/*--------------------- Temporary buffers ----------------
*
/*----------------- Device ---------------------------------*/
+
struct yaffs_DeviceStruct {
struct ylist_head devList;
const char *name;
/* Entry parameters set up way early. Yaffs sets up the rest.*/
int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
int nChunksPerBlock; /* does not need to be a power of 2 */
- int nBytesPerSpare; /* spare area size */
+ int spareBytesPerChunk; /* 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 */
/* Stuff used by the shared space checkpointing mechanism */
/* If this value is zero, then this mechanism is disabled */
-// int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
-
-
+/* int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
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 */
+ int useNANDECC; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */
+ int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */
+
+ int disableLazyLoad; /* Disable lazy loading on this device */
void *genericDevice; /* Pointer to device context
* On an mtd this holds the mtd pointer.
*/
- void *superBlock;
+ void *superBlock;
/* 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);
+ int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev);
#ifdef CONFIG_YAFFS_YAFFS2
- 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, __u32 *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, __u32 *sequenceNumber);
#endif
int isYaffs2;
/* The removeObjectCallback function must be supplied by OS flavours that
- * need it. The Linux kernel does not use this, but yaffs direct does use
- * it to implement the faster readdir
+ * need it.
+ * yaffs direct uses it to implement the faster readdir.
+ * Linux uses it to protect the directory during unlocking.
*/
void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
/* Callback to mark the superblock dirsty */
- void (*markSuperBlockDirty)(void * superblock);
+ void (*markSuperBlockDirty)(void *superblock);
int wideTnodesDisabled; /* Set to disable wide tnodes */
-
+
YCHAR *pathDividers; /* String of legal path dividers */
+
/* End of stuff that must be set before initialisation. */
/* Checkpoint control. Can be set before or after initialisation */
struct semaphore sem; /* Semaphore for waiting on erasure.*/
struct semaphore grossLock; /* Gross locking semaphore */
+ struct rw_semaphore dirLock; /* Lock the directory structure */
__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);
+ void (*putSuperFunc) (struct super_block *sb);
+ struct ylist_head searchContexts;
+
#endif
int isMounted;
yaffs_TnodeList *allocatedTnodeList;
int isDoingGC;
+ int gcBlock;
+ int gcChunk;
int nObjectsCreated;
yaffs_Object *freeObjects;
int nFreeObjects;
+ int nHardLinks;
+
yaffs_ObjectList *allocatedObjectList;
yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
int nUnlinkedFiles; /* Count of unlinked files. */
int nBackgroundDeletions; /* Count of background deletions. */
-
+
/* Temporary buffer management */
yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
int maxTemp;
/* yaffs2 runtime stuff */
unsigned sequenceNumber; /* Sequence number of currently allocating block */
unsigned oldestDirtySequence;
-
+
+ /* Auto empty lost and found directory on mount */
+ int emptyLostAndFound;
};
typedef struct yaffs_DeviceStruct yaffs_Device;
/* The static layout of block usage etc is stored in the super block header */
typedef struct {
- int StructType;
+ int StructType;
int version;
int checkpointStartBlock;
int checkpointEndBlock;
* must be preserved over unmount/mount cycles.
*/
typedef struct {
- int structType;
+ int structType;
int nErasedBlocks;
int allocationBlock; /* Current block being allocated off */
__u32 allocationPage;
typedef struct {
- int structType;
- __u32 magic;
- __u32 version;
- __u32 head;
+ int structType;
+ __u32 magic;
+ __u32 version;
+ __u32 head;
} yaffs_CheckpointValidity;
/*----------------------- YAFFS Functions -----------------------*/
-int yaffs_GutsInitialise(yaffs_Device * dev);
-void yaffs_Deinitialise(yaffs_Device * dev);
+int yaffs_GutsInitialise(yaffs_Device *dev);
+void yaffs_Deinitialise(yaffs_Device *dev);
-int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
+int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev);
-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);
-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_DeleteObject(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);
+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_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, loff_t offset,
- int nBytes);
-int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
- int nBytes, int writeThrough);
-int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize);
+int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset,
+ int nBytes);
+int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough);
+int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize);
+
+yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid);
-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_FlushFile(yaffs_Object *obj, int updateTime, int dataSync);
/* Flushing and checkpointing */
void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
int yaffs_CheckpointRestore(yaffs_Device *dev);
/* 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,
+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,
+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);
+ 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,
+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 */
#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);
/* A few useful functions */
-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);
void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
-__u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo);
-void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, int lineNo);
+__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
+void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
#endif
projects / yaffs2.git / blobdiff