/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2011 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
+ * Copyright (C) 2002-2018 Aleph One Ltd.
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
/* Special sequence number for bad block that failed to be marked bad */
#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000
-/* ChunkCache is used for short read/write operations.*/
+/* Chunk cache is used for short read/write operations.*/
struct yaffs_cache {
struct yaffs_obj *object;
int chunk_id;
u8 *data;
};
+struct yaffs_cache_manager {
+ struct yaffs_cache *cache;
+ int n_caches;
+ int cache_last_use;
+ int n_temp_buffers;
+};
+
/* yaffs1 tags structures in RAM
* NB This uses bitfield. Bitfields should not straddle a u32 boundary
* otherwise the structure size will get blown out.
union yaffs_tags_union {
struct yaffs_tags as_tags;
- u8 as_bytes[8];
+ u8 as_bytes[8];
+ u32 as_u32[2];
};
};
+union yaffs_block_info_union {
+ struct yaffs_block_info bi;
+ u32 as_u32[2];
+};
+
/* -------------------------- Object structure -------------------------------*/
/* This is the object structure as stored on NAND */
u32 type; /* enum yaffs_obj_type */
/* Apply to everything */
- int parent_obj_id;
+ u32 parent_obj_id;
u16 sum_no_longer_used; /* checksum of name. No longer used */
YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
int inband_tags; /* Use unband tags */
u32 total_bytes_per_chunk; /* Should be >= 512, does not need to
be a power of 2 */
- int chunks_per_block; /* does not need to be a power of 2 */
- int spare_bytes_per_chunk; /* spare area size */
- int start_block; /* Start block we're allowed to use */
- int end_block; /* End block we're allowed to use */
- int n_reserved_blocks; /* Tuneable so that we can reduce
+ u32 chunks_per_block; /* does not need to be a power of 2 */
+ u32 spare_bytes_per_chunk; /* spare area size */
+ u32 start_block; /* Start block we're allowed to use */
+ u32 end_block; /* End block we're allowed to use */
+ u32 n_reserved_blocks; /* Tuneable so that we can reduce
* reserved blocks on NOR and RAM. */
- int n_caches; /* If <= 0, then short op caching is disabled,
+ u32 n_caches; /* If == 0, then short op caching is disabled,
* else the number of short op caches.
*/
int cache_bypass_aligned; /* If non-zero then bypass the cache for
int hide_lost_n_found; /* Set non-zero to hide the lost-n-found dir. */
+ int stored_endian; /* 0=cpu endian, 1=little endian, 2=big endian */
+
/* The remove_obj_fn function must be supplied by OS flavours that
* need it.
* yaffs direct uses it to implement the faster readdir.
int ll_init;
/* Runtime parameters. Set up by YAFFS. */
- int data_bytes_per_chunk;
+ u32 data_bytes_per_chunk;
/* Non-wide tnode stuff */
u16 chunk_grp_bits; /* Number of bits that need to be resolved if
*/
u16 chunk_grp_size; /* == 2^^chunk_grp_bits */
+ struct yaffs_tnode *tn_swap_buffer;
+
/* Stuff to support wide tnodes */
u32 tnode_width;
u32 tnode_mask;
int is_mounted;
int read_only;
int is_checkpointed;
+ int swap_endian; /* Stored endian needs endian swap. */
/* Stuff to support block offsetting to support start block zero */
- int internal_start_block;
- int internal_end_block;
+ u32 internal_start_block;
+ u32 internal_end_block;
int block_offset;
int chunk_offset;
int checkpt_byte_offs;
u8 *checkpt_buffer;
int checkpt_open_write;
- int blocks_in_checkpt;
+ u32 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_max_blocks;
u32 checkpt_sum;
u32 checkpt_xor;
int buffered_block; /* Which block is buffered here? */
int doing_buffered_block_rewrite;
- struct yaffs_cache *cache;
- int cache_last_use;
+ struct yaffs_cache_manager cache_mgr;
/* Stuff for background deletion and unlinked files. */
struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted
int yaffs_guts_initialise(struct yaffs_dev *dev);
void yaffs_deinitialise(struct yaffs_dev *dev);
+void yaffs_guts_cleanup(struct yaffs_dev *dev);
int yaffs_get_n_free_chunks(struct yaffs_dev *dev);
int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name,
struct yaffs_obj *new_dir, const YCHAR * new_name);
+int yaffs_unlink_obj(struct yaffs_obj *obj);
+
int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name);
int yaffs_del_obj(struct yaffs_obj *obj);
struct yaffs_obj *yaffs_retype_obj(struct yaffs_obj *obj,
void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
int *chunk_out, u32 *offset_out);
/*
- * Marshalling functions to get loff_t file sizes into aand out of
+ * Marshalling functions to get loff_t file sizes into and out of
* object headers.
*/
-void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize);
-loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh);
+void yaffs_oh_size_load(struct yaffs_dev *dev, struct yaffs_obj_hdr *oh,
+ loff_t fsize, int do_endian);
+loff_t yaffs_oh_to_size(struct yaffs_dev *dev, struct yaffs_obj_hdr *oh,
+ int do_endian);
loff_t yaffs_max_file_size(struct yaffs_dev *dev);
+
+/* yaffs_wr_data_obj needs to be exposed to allow the cache to access it. */
+int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
+ const u8 *buffer, int n_bytes, int use_reserve);
+
/*
* Debug function to count number of blocks in each state
* NB Needs to be called with correct number of integers
int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
struct yaffs_ext_tags *tags);
+/*
+ * Define LOFF_T_32_BIT if a 32-bit LOFF_T is being used.
+ * Not serious if you get this wrong - you might just get some warnings.
+*/
+
+#ifdef LOFF_T_32_BIT
+#define FSIZE_LOW(fsize) (fsize)
+#define FSIZE_HIGH(fsize) 0
+#define FSIZE_COMBINE(high, low) (low)
+#else
+#define FSIZE_LOW(fsize) ((fsize) & 0xffffffff)
+#define FSIZE_HIGH(fsize)(((fsize) >> 32) & 0xffffffff)
+#define FSIZE_COMBINE(high, low) ((((loff_t) (high)) << 32) | \
+ (((loff_t) (low)) & 0xFFFFFFFF))
+#endif
+
+
#endif
projects / yaffs2.git / blobdiff