X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.h;h=87b539b05b71284a20efcb9350ba5e653a8aecce;hp=543bf628c77f91bfe3b8d7086183c1054a336279;hb=7b7ff60a62448da4850791aa986c2c19354e93f2;hpb=e434bac0480bf62ea4d66519ff40dad3d2e3e410

diff --git a/yaffs_guts.h b/yaffs_guts.h
index 543bf62..87b539b 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 1.25 2006-10-13 08:52:49 charles Exp $
  */
 
 #ifndef __YAFFS_GUTS_H__
@@ -67,9 +63,7 @@
 
 #define YAFFS_OBJECT_SPACE		0x40000
 
-#define YAFFS_NCHECKPOINT_OBJECTS	5000
-
-#define YAFFS_CHECKPOINT_VERSION 	2
+#define YAFFS_CHECKPOINT_VERSION 	3
 
 #ifdef CONFIG_YAFFS_UNICODE
 #define YAFFS_MAX_NAME_LENGTH		127
@@ -98,6 +92,12 @@
 
 #define YAFFS_N_TEMP_BUFFERS		4
 
+/* We limit the number attempts at sucessfully saving a chunk of data.
+ * Small-page devices have 32 pages per block; large-page devices have 64.
+ * Default to something in the order of 5 to 10 blocks worth of chunks.
+ */
+#define YAFFS_WR_ATTEMPTS		(5*64)
+
 /* Sequence numbers are used in YAFFS2 to determine block allocation order.
  * The range is limited slightly to help distinguish bad numbers from good.
  * This also allows us to perhaps in the future use special numbers for
@@ -166,6 +166,8 @@ typedef enum {
 	YAFFS_OBJECT_TYPE_SPECIAL
 } yaffs_ObjectType;
 
+#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
+
 typedef struct {
 
 	unsigned validMarker0;
@@ -268,15 +270,18 @@ 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:10;	/* number of soft deleted pages */
 	int pagesInUse:10;	/* number of pages in use */
-	yaffs_BlockState blockState:4;	/* One of the above block states */
+	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 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 */
 
@@ -535,9 +540,6 @@ 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 */
@@ -599,6 +601,10 @@ 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. */
 
@@ -654,6 +660,8 @@ struct yaffs_DeviceStruct {
 	int checkpointNextBlock;
 	int *checkpointBlockList;
 	int checkpointMaxBlocks;
+	__u32 checkpointSum;
+	__u32 checkpointXor;
 	
 	/* Block Info */
 	yaffs_BlockInfo *blockInfo;
@@ -690,6 +698,7 @@ struct yaffs_DeviceStruct {
 	int currentDirtyChecker;	/* Used to find current dirtiest block */
 
 	__u32 *gcCleanupList;	/* objects to delete at the end of a GC. */
+	int nonAggressiveSkip;	/* GC state/mode */
 
 	/* Statistcs */
 	int nPageWrites;