Write object headers with stored file extents

[yaffs2.git] / yaffs_guts.h

diff --git a/yaffs_guts.h b/yaffs_guts.h
index 231f8ac567eb86e3583f4c1fc436e9c89a4ca2c8..e2b2fb9378afe615beba22b0eb86f3d65a992b99 100644 (file)
--- a/yaffs_guts.h
+++ b/yaffs_guts.h
@@ -167,6 +167,12 @@ enum yaffs_ecc_result {
        YAFFS_ECC_RESULT_UNFIXED
 };
 
+/*
+ * Object type enum:
+ * When this is stored in flash we store it as a u32 instead
+ * to prevent any alignment change issues as compiler variants change.
+ */
+
 enum yaffs_obj_type {
        YAFFS_OBJECT_TYPE_UNKNOWN,
        YAFFS_OBJECT_TYPE_FILE,
@@ -310,7 +316,7 @@ struct yaffs_block_info {
 /* This is the object structure as stored on NAND */
 
 struct yaffs_obj_hdr {
-       enum yaffs_obj_type type;
+       u32 type;  /* enum yaffs_obj_type  */
 
        /* Apply to everything  */
        int parent_obj_id;
@@ -368,9 +374,19 @@ struct yaffs_tnode {
  * - a hard link
  */
 
+/* The file variant has three file sizes:
+ *  - file_size : size of file as written into Yaffs - including data in cache.
+ *  - stored_size - size of file as stored on media.
+ *  - shrink_size - size of file that has been shrunk back to.
+ *
+ * The stored_size and file_size might be different because the data written
+ * into the cache will increase the file_size but the stored_size will only
+ * change when the data is actually stored.
+ *
+ */
 struct yaffs_file_var {
        loff_t file_size;
-       loff_t scanned_size;
+       loff_t stored_size;
        loff_t shrink_size;
        int top_level;
        struct yaffs_tnode *top;
@@ -470,7 +486,7 @@ struct yaffs_obj {
 
        void *my_inode;
 
-       enum yaffs_obj_type variant_type;
+       u32 variant_type; /* enum yaffs_object_type */
 
        union yaffs_obj_var variant;
 
@@ -490,7 +506,7 @@ struct yaffs_checkpt_obj {
        u32 obj_id;
        u32 parent_id;
        int hdr_chunk;
-       enum yaffs_obj_type variant_type:3;
+       u32 variant_type:3; /* enum yaffs_obj_type */
        u8 deleted:1;
        u8 soft_del:1;
        u8 unlinked:1;