X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.h;h=b7803151fe933e3783ad1fdd002c9bfc90625de6;hp=e66efcf206c50a55741e24a943592b1212c77d16;hb=749436878923f8c152c98cc016f32c0562479182;hpb=a8e9cfa2968a5f16ff9ae578cc1d3202ebef8725

diff --git a/yaffs_guts.h b/yaffs_guts.h
index e66efcf..b780315 100644
--- a/yaffs_guts.h
+++ b/yaffs_guts.h
@@ -1,8 +1,7 @@
 /*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
- * yaffs_guts.h: Configuration etc for yaffs_guts
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. 
  *
- * Copyright (C) 2002 Aleph One Ltd.
+ * Copyright (C) 2002-2007 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
@@ -11,10 +10,7 @@
  * 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.
- *
- * $Id: yaffs_guts.h,v 1.23 2006-09-21 08:13:59 charles Exp $
  */
 
 #ifndef __YAFFS_GUTS_H__
@@ -67,7 +63,7 @@
 
 #define YAFFS_OBJECT_SPACE		0x40000
 
-#define YAFFS_NCHECKPOINT_OBJECTS	5000
+#define YAFFS_CHECKPOINT_VERSION 	3
 
 #ifdef CONFIG_YAFFS_UNICODE
 #define YAFFS_MAX_NAME_LENGTH		127
@@ -164,6 +160,8 @@ typedef enum {
 	YAFFS_OBJECT_TYPE_SPECIAL
 } yaffs_ObjectType;
 
+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
+
 typedef struct {
 
 	unsigned validMarker0;
@@ -266,16 +264,20 @@ typedef enum {
 	/* This block has failed and is not in use */
 } yaffs_BlockState;
 
+#define	YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
+
+
 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 */
+	int softDeletions:10;	/* number of soft deleted pages */
+	int pagesInUse:10;	/* number of pages in use */
+	__u32 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 bank check has failed 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 */
 
 #ifdef CONFIG_YAFFS_YAFFS2
 	__u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
@@ -524,7 +526,7 @@ struct yaffs_DeviceStruct {
 	const char *name;
 
 	/* Entry parameters set up way early. Yaffs sets up the rest.*/
-	int nBytesPerChunk;	/* Should be a power of 2 >= 512 */
+	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 startBlock;		/* Start block we're allowed to use */
@@ -532,9 +534,6 @@ struct yaffs_DeviceStruct {
 	int nReservedBlocks;	/* We want this tuneable so that we can reduce */
 				/* reserved blocks on NOR and RAM. */
 	
-	/* Stuff used by the partitioned checkpointing mechanism */
-	int checkpointStartBlock;
-	int checkpointEndBlock;
 	
 	/* Stuff used by the shared space checkpointing mechanism */
 	/* If this value is zero, then this mechanism is disabled */
@@ -596,6 +595,10 @@ struct yaffs_DeviceStruct {
 	
 
 	/* End of stuff that must be set before initialisation. */
+	
+	/* Checkpoint control. Can be set before or after initialisation */
+	__u8 skipCheckpointRead;
+	__u8 skipCheckpointWrite;
 
 	/* Runtime parameters. Set up by YAFFS. */
 
@@ -606,6 +609,16 @@ struct yaffs_DeviceStruct {
 	__u32 tnodeWidth;
 	__u32 tnodeMask;
 	
+	/* Stuff to support various file offses to chunk/offset translations */
+	/* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
+	__u32 crumbMask;
+	__u32 crumbShift;
+	__u32 crumbsPerChunk;
+	
+	/* Straight shifting for nDataBytesPerChunk being a power of 2 */
+	__u32 chunkShift;
+	__u32 chunkMask;
+	
 
 #ifdef __KERNEL__
 
@@ -621,6 +634,7 @@ struct yaffs_DeviceStruct {
 	
 	int isCheckpointed;
 
+
 	/* Stuff to support block offsetting to support start block zero */
 	int internalStartBlock;
 	int internalEndBlock;
@@ -640,6 +654,8 @@ struct yaffs_DeviceStruct {
 	int checkpointNextBlock;
 	int *checkpointBlockList;
 	int checkpointMaxBlocks;
+	__u32 checkpointSum;
+	__u32 checkpointXor;
 	
 	/* Block Info */
 	yaffs_BlockInfo *blockInfo;
@@ -693,6 +709,8 @@ struct yaffs_DeviceStruct {
 	int tagsEccUnfixed;
 	int nDeletions;
 	int nUnmarkedDeletions;
+	
+	int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
 
 	/* Special directories */
 	yaffs_Object *rootDir;
@@ -808,11 +826,11 @@ 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 yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset,
 			   int nBytes);
-int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, __u32 offset,
+int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
 			  int nBytes, int writeThrough);
-int yaffs_ResizeFile(yaffs_Object * obj, int newSize);
+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);
@@ -872,5 +890,6 @@ 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_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
 
 #endif