#define YAFFS_OBJECT_SPACE 0x40000
-#define YAFFS_CHECKPOINT_VERSION 3
+#define YAFFS_CHECKPOINT_VERSION 4
#ifdef CONFIG_YAFFS_UNICODE
#define YAFFS_MAX_NAME_LENGTH 127
#define YAFFS_OBJECTID_UNLINKED 3
#define YAFFS_OBJECTID_DELETED 4
-/* Sseudo object ids for checkpointing */
+/* Pseudo object ids for checkpointing */
#define YAFFS_OBJECTID_SB_HEADER 0x10
#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-/* */
#define YAFFS_MAX_SHORT_OP_CACHES 20
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
- __u8 data[YAFFS_BYTES_PER_CHUNK];
-#endif
} yaffs_ChunkCache;
YAFFS_BLOCK_STATE_UNKNOWN = 0,
YAFFS_BLOCK_STATE_SCANNING,
+ /* Being scanned */
+
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 block is partially allocated.
* At least one page holds valid data.
* This is the one currently being used for page
- * allocation. Should never be more than one of these
+ * allocation. Should never be more than one of these.
+ * If a block is only partially allocated at mount it is treated as full.
*/
YAFFS_BLOCK_STATE_FULL,
/* All the pages in this block have been allocated.
+ * If a block was only partially allocated when mounted we treat
+ * it as fully allocated.
*/
YAFFS_BLOCK_STATE_DIRTY,
- /* All pages have been allocated and deleted.
+ /* The block was full and now all chunks have been deleted.
* Erase me, reuse me.
*/
YAFFS_BLOCK_STATE_CHECKPOINT,
- /* This block is assigned to holding checkpoint data.
- */
+ /* This block is assigned to holding checkpoint data. */
YAFFS_BLOCK_STATE_COLLECTING,
/* This block is being garbage collected */
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 */
* 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 */
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;
/*----------------- Device ---------------------------------*/
-struct yaffs_DeviceStruct {
- struct ylist_head devList;
+
+struct yaffs_DeviceParamStruct {
const char *name;
- /* Entry parameters set up way early. Yaffs sets up the rest.*/
- int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
+ /*
+ * Entry parameters set up way early. Yaffs sets up the rest.
+ * The structure should be zeroed out before use so that unused
+ * and defualt values are zero.
+ */
+
+ int inbandTags; /* Use unband tags */
+ __u32 totalBytesPerChunk; /* Should be >= 512, does not need to be a power of 2 */
int nChunksPerBlock; /* does not need to be a power of 2 */
int spareBytesPerChunk; /* spare area size */
int startBlock; /* Start block we're allowed to use */
/* reserved blocks on NOR and RAM. */
- /* 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 nShortOpCaches; /* If <= 0, then short op caching is disabled, else
- * the number of short op caches (don't use too many)
+ * the number of short op caches (don't use too many).
+ * 10 to 20 is a good bet.
*/
-
- 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 on data (yaffs1) */
int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */
- void *genericDevice; /* Pointer to device context
- * On an mtd this holds the mtd pointer.
- */
- void *superBlock;
+ int isYaffs2; /* Use yaffs2 mode on this device */
+
+ int emptyLostAndFound; /* Auto-empty lost+found directory on mount */
+
+ int refreshPeriod; /* How often we should check to do a block refresh */
+
+ /* Checkpoint control. Can be set before or after initialisation */
+ __u8 skipCheckpointRead;
+ __u8 skipCheckpointWrite;
/* NAND access functions (Must be set before calling YAFFS)*/
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);
+ /* Callback to mark the superblock dirty */
+ void (*markSuperBlockDirty)(struct yaffs_DeviceStruct *dev);
+ /* Debug control flags. Don't use unless you know what you're doing */
+ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
+ int disableLazyLoad; /* Disable lazy loading on this device */
int wideTnodesDisabled; /* Set to disable wide tnodes */
- YCHAR *pathDividers; /* String of legal path dividers */
+ /* End of stuff that must be set before initialisation. */
+};
+typedef struct yaffs_DeviceParamStruct yaffs_DeviceParam;
- /* End of stuff that must be set before initialisation. */
+struct yaffs_DeviceStruct {
+ struct yaffs_DeviceParamStruct param;
- /* Checkpoint control. Can be set before or after initialisation */
- __u8 skipCheckpointRead;
- __u8 skipCheckpointWrite;
+ /* Context storage. Holds extra OS specific data for this device */
+
+ void *context;
/* Runtime parameters. Set up by YAFFS. */
+ int nDataBytesPerChunk;
- __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
+ /* Non-wide tnode stuff */
+ __u16 chunkGroupBits; /* Number of bits that need to be resolved if
+ * the tnodes are not wide enough.
+ */
__u16 chunkGroupSize; /* == 2^^chunkGroupBits */
/* Stuff to support wide tnodes */
__u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */
__u32 chunkMask; /* Mask to use for power-of-2 case */
- /* Stuff to handle inband tags */
- int inbandTags;
- __u32 totalBytesPerChunk;
-#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);
-#endif
int isMounted;
-
+ int readOnly;
int isCheckpointed;
__u32 allocationPage;
int allocationBlockFinder; /* Used to search for next allocation block */
- /* Runtime state */
int nTnodesCreated;
yaffs_Tnode *freeTnodes;
int nFreeTnodes;
yaffs_ObjectList *allocatedObjectList;
yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
+ __u32 bucketFinder;
int nFreeChunks;
__u32 *gcCleanupList; /* objects to delete at the end of a GC. */
int nonAggressiveSkip; /* GC state/mode */
- /* Statistcs */
- int nPageWrites;
- int nPageReads;
- int nBlockErasures;
- int nErasureFailures;
- int nGCCopies;
- int garbageCollections;
- int passiveGarbageCollections;
- int nRetriedWrites;
- int nRetiredBlocks;
- int eccFixed;
- int eccUnfixed;
- int tagsEccFixed;
- int tagsEccUnfixed;
- int nDeletions;
- int nUnmarkedDeletions;
-
int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
/* Special directories */
yaffs_ChunkCache *srCache;
int srLastUse;
- 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. */
int nUnlinkedFiles; /* Count of unlinked files. */
int nBackgroundDeletions; /* Count of background deletions. */
-
/* Temporary buffer management */
yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
int maxTemp;
unsigned sequenceNumber; /* Sequence number of currently allocating block */
unsigned oldestDirtySequence;
+ /* Block refreshing */
+ int refreshSkip; /* A skip down counter. Refresh happens when this gets to zero. */
+
+ /* Statistcs */
+ int nPageWrites;
+ int nPageReads;
+ int nBlockErasures;
+ int nErasureFailures;
+ int nGCCopies;
+ int garbageCollections;
+ int passiveGarbageCollections;
+ int nRetriedWrites;
+ int nRetiredBlocks;
+ int eccFixed;
+ int eccUnfixed;
+ int tagsEccFixed;
+ int tagsEccUnfixed;
+ int nDeletions;
+ int nUnmarkedDeletions;
+ int refreshCount;
+ int cacheHits;
+
};
typedef struct yaffs_DeviceStruct yaffs_Device;
/* yaffs2 runtime stuff */
unsigned sequenceNumber; /* Sequence number of currently allocating block */
- unsigned oldestDirtySequence;
} yaffs_CheckpointDevice;
void yfsd_WinFileTimeNow(__u32 target[2]);
#endif
-#ifdef __KERNEL__
-
void yaffs_HandleDeferedFree(yaffs_Object *obj);
-#endif
/* Debug dump */
int yaffs_DumpObject(yaffs_Object *obj);
projects / yaffs2.git / blobdiff