+/* The static layout of bllock usage etc is stored in the super block header */
+typedef struct {
+ int StructType;
+ int version;
+ int checkpointStartBlock;
+ int checkpointEndBlock;
+ int startBlock;
+ int endBlock;
+ int rfu[100];
+} yaffs_SuperBlockHeader;
+
+/* The CheckpointDevice structure holds the device information that changes at runtime and
+ * must be preserved over unmount/mount cycles.
+ */
+typedef struct {
+ int structType;
+ int nErasedBlocks;
+ int allocationBlock; /* Current block being allocated off */
+ __u32 allocationPage;
+ int nFreeChunks;
+
+ int nDeletedFiles; /* Count of files awaiting deletion;*/
+ int nUnlinkedFiles; /* Count of unlinked files. */
+ int nBackgroundDeletions; /* Count of background deletions. */
+
+ /* yaffs2 runtime stuff */
+ unsigned sequenceNumber; /* Sequence number of currently allocating block */
+ unsigned oldestDirtySequence;
+
+} yaffs_CheckpointDevice;
+
+
+typedef struct {
+ int structType;
+ __u32 magic;
+ __u32 version;
+ __u32 head;
+} yaffs_CheckpointValidity;
+