Add non-partitioned checkpointing

[yaffs2.git] / yaffs_guts.h

diff --git a/yaffs_guts.h b/yaffs_guts.h
index 2da744940b09698983394d54dd68979915005679..de0627e273a6579def2b1deaae816e0726ea5e38 100644 (file)
--- a/yaffs_guts.h
+++ b/yaffs_guts.h
@@ -14,7 +14,7 @@
  *
  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  *
- * $Id: yaffs_guts.h,v 1.21 2006-05-08 10:13:34 charles Exp $
+ * $Id: yaffs_guts.h,v 1.22 2006-05-17 09:31:06 charles Exp $
  */
 
 #ifndef __YAFFS_GUTS_H__
@@ -88,6 +88,7 @@
 /* Sseudo object ids for checkpointing */
 #define YAFFS_OBJECTID_SB_HEADER       0x10
 #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
+#define YAFFS_SEQUENCE_CHECKPOINT_DATA  0x21
 
 /* */
 
@@ -240,13 +241,13 @@ typedef enum {
 
        YAFFS_BLOCK_STATE_ALLOCATING,
        /* 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
         */
 
        YAFFS_BLOCK_STATE_FULL, 
        /* All the pages in this block have been allocated.
-        * At least one page holds valid data.
         */
 
        YAFFS_BLOCK_STATE_DIRTY,
@@ -254,6 +255,10 @@ typedef enum {
         * Erase me, reuse me.
         */
 
+       YAFFS_BLOCK_STATE_CHECKPOINT,   
+       /* This block is assigned to holding checkpoint data.
+        */
+
        YAFFS_BLOCK_STATE_COLLECTING,   
        /* This block is being garbage collected */
 
@@ -522,10 +527,15 @@ struct yaffs_DeviceStruct {
        int endBlock;           /* End block we're allowed to use */
        int nReservedBlocks;    /* We want this tuneable so that we can reduce */
                                /* reserved blocks on NOR and RAM. */
-       /* Stuff used by checkpointing */
-       int headerBlock;
+       
+       /* 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 */
+       
+       int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
 
        
 
@@ -541,6 +551,8 @@ struct yaffs_DeviceStruct {
        void *genericDevice;    /* Pointer to device context
                                 * On an mtd this holds the mtd pointer.
                                 */
+        void *superBlock;
+        
        /* NAND access functions (Must be set before calling YAFFS)*/
 
        int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
@@ -573,6 +585,9 @@ struct yaffs_DeviceStruct {
         */
        void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
        
+       /* Callback to mark the superblock dirsty */
+       void (*markSuperBlockDirty)(void * superblock);
+       
        int wideTnodesDisabled; /* Set to disable wide tnodes */
        
 
@@ -610,12 +625,17 @@ struct yaffs_DeviceStruct {
        
 
        /* Runtime checkpointing stuff */
-       int checkpointBlock;
-       int checkpointPage;
+       int checkpointPageSequence;   /* running sequence number of checkpoint pages */
        int checkpointByteCount;
        int checkpointByteOffset;
        __u8 *checkpointBuffer;
        int checkpointOpenForWrite;
+       int blocksInCheckpoint;
+       int checkpointCurrentChunk;
+       int checkpointCurrentBlock;
+       int checkpointNextBlock;
+       int *checkpointBlockList;
+       int checkpointMaxBlocks;
        
        /* Block Info */
        yaffs_BlockInfo *blockInfo;