* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
* published by the Free Software Foundation.
*
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
*/
#ifndef __YAFFS_GUTS_H__
#define YAFFS_OK 1
#define YAFFS_FAIL 0
-// Y=0x59, A=0x41, S=0x53
+// Give us a Y=0x59,
+// Give us an A=0x41,
+// Give us an FF=0xFF
+// Give us an S=0x53
+// And what have we got...
#define YAFFS_MAGIC 0x5941FF53
#define YAFFS_NTNODES_LEVEL0 16
#define YAFFS_OBJECT_SPACE 0x40000
#define YAFFS_MAX_NAME_LENGTH 255
-#define YAFFS_MAX_ALIAS_LENGTH 211
+#define YAFFS_MAX_ALIAS_LENGTH 159
#define YAFFS_OBJECTID_ROOT 1
-#define YAFFS_ROOT_MODE 0666
#define YAFFS_OBJECTID_LOSTNFOUND 2
-#define YAFFS_LOSTNFOUND_NAME "lost+found"
+#define YAFFS_OBJECTID_UNLINKED 3
+
+#define YAFFS_N_CACHE_CHUNKS 10
+
+#ifdef WIN32
+
+// Force the short operation cache on for WinCE
+
+#define CONFIG_YAFFS_SHORT_OP_CACHE
+#endif
+
+
+// ChunkCache is used for short read/write operations.
+typedef struct
+{
+ int objectId;
+ int chunkId;
+ int lastUse;
+ int dirty;
+ __u8 data[YAFFS_BYTES_PER_CHUNK];
+} yaffs_ChunkCache;
// Tags structures in RAM
// NB This uses bitfield. Bitfields should not stradle a u32 boundary otherwise
__u8 tagByte1;
__u8 tagByte2;
__u8 tagByte3;
- __u8 pageStatus; // Currently unused, but sort of set aside to distinguish
- // unused - vs- used -vs- deleted chunks. We achieve this by
- // using the objectId tags.
+ __u8 pageStatus; // set to 0 to delete the chunk
__u8 blockStatus;
__u8 tagByte4;
__u8 tagByte5;
YAFFS_BLOCK_STATE_DIRTY, // All pages have been allocated and deleted.
// Erase me, reuse me.
- YAFFS_BLOCK_STATE_DEAD = 0x99 // This block has failed and is not in use
+ YAFFS_BLOCK_STATE_DEAD = 0x77 // This block has failed and is not in use
} yaffs_BlockState;
__u32 pageBits; // bitmap of pages in use
__u8 blockState; // One of the above block states
__u8 pagesInUse; // number of pages in use
+ __u8 needsRetiring:1; // Data has failed on this block, need to get valid data off
+ // and retire the block.
} yaffs_BlockInfo;
YAFFS_OBJECT_TYPE_FILE,
YAFFS_OBJECT_TYPE_SYMLINK,
YAFFS_OBJECT_TYPE_DIRECTORY,
- YAFFS_OBJECT_TYPE_HARDLINK
+ YAFFS_OBJECT_TYPE_HARDLINK,
+ YAFFS_OBJECT_TYPE_SPECIAL
} yaffs_ObjectType;
typedef struct
// Equivalent object id applies to hard links only.
int equivalentObjectId;
+
+ // Alias is for symlinks only.
char alias[YAFFS_MAX_ALIAS_LENGTH + 1];
+ __u32 st_rdev; // device stuff for block and char devices (maj/min)
+ // Roowm to grow...
+ __u32 roomToGrow[12];
} yaffs_ObjectHeader;
typedef struct
{
__u32 fileSize;
+ __u32 scannedFileSize;
__u32 topLevel;
yaffs_Tnode *top;
} yaffs_FileStructure;
struct yaffs_ObjectStruct
{
+ __u8 deleted: 1; // This should only apply to unlinked files.
+ __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 unlinkAllowed:1;
// Where's my data in NAND?
int chunkId; // where it lives
+
+ int nDataChunks;
__u32 objectId; // the object id value
__u32 st_atime; // time of last access
__u32 st_mtime; // time of last modification
__u32 st_ctime; // time of last change
+ __u32 st_rdev; // device stuff for block and char devices
+
+#ifdef WIN32
+ __u32 inUse;
+#endif
+
+#ifdef __KERNEL__
+ struct inode *myInode;
+#endif
+
yaffs_ObjectType variantType;
struct yaffs_DeviceStruct
{
// Entry parameters set up way early. Yaffs sets up the rest.
- __u32 nBlocks; // Size of whole device in blocks
+ // __u32 nBlocks; // Size of whole device in blocks
__u32 startBlock; // Start block we're allowed to use
__u32 endBlock; // End block we're allowed to use
__u16 chunkGroupBits; // 0 for devices <= 32MB. else log2(nchunks) - 16
#ifdef __KERNEL__
struct semaphore sem;// Semaphore for waiting on erasure.
+ struct semaphore grossLock; // Gross locking semaphore
#endif
int garbageCollectionRequired;
+ // Operations since mount
+ int nPageWrites;
+ int nPageReads;
+ int nBlockErasures;
+ int nGCCopies;
+ int garbageCollections;
+ int nRetriedWrites;
+ int nRetiredBlocks;
+
yaffs_Object *rootDir;
yaffs_Object *lostNFoundDir;
+ // 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 blockSelectedForGC;
+
+#ifdef CONFIG_YAFFS_SHORT_OP_CACHE
+ yaffs_ChunkCache srCache[YAFFS_N_CACHE_CHUNKS];
+ int srLastUse;
+#endif
+ int cacheHits;
+
+ // Stuff for background deletion and unlinked files.
+ yaffs_Object *unlinkedDir; // Directory where unlinked and deleted files live.
+ 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.
};
- typedef struct yaffs_DeviceStruct yaffs_Device;
+typedef struct yaffs_DeviceStruct yaffs_Device;
// generic Object functions
int yaffs_Unlink(yaffs_Object *dir, const char *name);
+int yaffs_DeleteFile(yaffs_Object *obj);
// Object access functions.
int yaffs_GetObjectName(yaffs_Object *obj,char *name,int buffSize);
yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const char *name, __u32 mode, __u32 uid, __u32 gid, const char *alias);
char *yaffs_GetSymlinkAlias(yaffs_Object *obj);
+// Special inodes (fifos, sockets and devices)
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const char *name, __u32 mode, __u32 uid, __u32 gid,__u32 rdev);
+
// Special directories
yaffs_Object *yaffs_Root(yaffs_Device *dev);
projects / yaffs / .git / blobdiff