int is_checkpointed;
/* Stuff to support block offsetting to support start block zero */
int internal_start_block;
int internal_end_block;
int block_offset;
int chunk_offset;
/* Runtime checkpointing stuff */
int checkpt_page_seq; /* running sequence number of checkpt pages */
int checkpt_byte_count;
int checkpt_byte_offs;
u8 *checkpt_buffer;
int checkpt_open_write;
int blocks_in_checkpt;
int checkpt_cur_chunk;
int checkpt_cur_block;
int checkpt_next_block;
int *checkpt_block_list;
int checkpt_max_blocks;
u32 checkpt_sum;
u32 checkpt_xor;
int checkpoint_blocks_required; /* Number of blocks needed to store
* current checkpoint set */
/* Block Info */
struct yaffs_block_info *block_info;
u8 *chunk_bits; /* bitmap of chunks in use */
unsigned block_info_alt:1; /* allocated using alternative alloc */
unsigned chunk_bits_alt:1; /* allocated using alternative alloc */
int chunk_bit_stride; /* Number of bytes of chunk_bits per block.
* Must be consistent with chunks_per_block.
*/
int n_erased_blocks;
int alloc_block; /* Current block being allocated off */
u32 alloc_page;
int alloc_block_finder; /* Used to search for next allocation block */
/* Object and Tnode memory management */
void *allocator;
int n_obj;
int n_tnodes;
int n_hardlinks;
struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS];
u32 bucket_finder;
int n_free_chunks;
/* Garbage collection control */
u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */
u32 n_clean_ups;
unsigned has_pending_prioritised_gc; /* We think this device might
have pending prioritised gcs */
unsigned gc_disable;
unsigned gc_block_finder;
unsigned gc_dirtiest;
unsigned gc_pages_in_use;
unsigned gc_not_done;
unsigned gc_block;
unsigned gc_chunk;
unsigned gc_skip;
struct yaffs_summary_tags *gc_sum_tags;
/* Special directories */
struct yaffs_obj *root_dir;
struct yaffs_obj *lost_n_found;
int buffered_block; /* Which block is buffered here */
int doing_buffered_block_rewrite;
struct yaffs_cache *cache;
int cache_last_use;
/* Stuff for background deletion and unlinked files. */
struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
files live. */
struct yaffs_obj *del_dir; /* Directory where deleted objects are
sent to disappear. */
struct yaffs_obj *unlinked_deletion; /* Current file being
background deleted. */
int n_deleted_files; /* Count of files awaiting deletion; */
int n_unlinked_files; /* Count of unlinked files. */
int n_bg_deletions; /* Count of background deletions. */
/* Temporary buffer management */
struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS];
int max_temp;
int temp_in_use;
int unmanaged_buffer_allocs;
int unmanaged_buffer_deallocs;
/* yaffs2 runtime stuff */
unsigned seq_number; /* Sequence number of currently
allocating block */
unsigned oldest_dirty_seq;
unsigned oldest_dirty_block;
/* Block refreshing */
int refresh_skip; /* A skip down counter.
* Refresh happens when this gets to zero. */
/* Dirty directory handling */
struct list_head dirty_dirs; /* List of dirty directorie