/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
* yaffs_guts.h: Configuration etc for yaffs_guts
*
* Copyright (C) 2002 Aleph One Ltd.
*
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
*
- * $Id: yaffs_guts.h,v 1.2 2004-11-16 02:36:15 charles Exp $
+ * $Id: yaffs_guts.h,v 1.5 2005-07-03 10:32:40 charles Exp $
*/
#ifndef __YAFFS_GUTS_H__
#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
#endif
+#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
+#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
+
#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
YAFFS_ECC_RESULT_UNFIXED
} yaffs_ECCResult;
+typedef enum
+{
+ YAFFS_OBJECT_TYPE_UNKNOWN,
+ YAFFS_OBJECT_TYPE_FILE,
+ YAFFS_OBJECT_TYPE_SYMLINK,
+ YAFFS_OBJECT_TYPE_DIRECTORY,
+ YAFFS_OBJECT_TYPE_HARDLINK,
+ YAFFS_OBJECT_TYPE_SPECIAL
+} yaffs_ObjectType;
+
+
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
+ 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
// YAFFS2 stuff
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 validMarker1;
} yaffs_ExtendedTags;
typedef struct
{
- int softDeletions:8; // number of soft deleted pages
- int pagesInUse:8; // number of pages in use
- __u32 blockState:4; // One of the above block states
+ 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
//////////////////// Object structure ///////////////////////////
// This is the object structure as stored on NAND
-typedef enum
-{
- YAFFS_OBJECT_TYPE_UNKNOWN,
- YAFFS_OBJECT_TYPE_FILE,
- YAFFS_OBJECT_TYPE_SYMLINK,
- YAFFS_OBJECT_TYPE_DIRECTORY,
- YAFFS_OBJECT_TYPE_HARDLINK,
- YAFFS_OBJECT_TYPE_SPECIAL
-} yaffs_ObjectType;
-
typedef struct
{
yaffs_ObjectType type;
{
__u32 fileSize;
__u32 scannedFileSize;
+ __u32 shrinkSize;
int topLevel;
yaffs_Tnode *top;
} yaffs_FileStructure;
__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;
+ __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
__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
+ // 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 siblings; // siblings in a directory
// also used for linking up the free list
- // Where's my data in NAND?
+ // Where's my object header in NAND?
int chunkId; // where it lives
- int nDataChunks;
+ int nDataChunks; // Number of data chunks attached to the file.
__u32 objectId; // the object id value
struct semaphore sem;// Semaphore for waiting on erasure.
struct semaphore grossLock; // Gross locking semaphore
-
-#endif
-#ifdef __KERNEL__
+ __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
// 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 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);
projects / yaffs2.git / blobdiff