| /* |
| * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. |
| * |
| * Copyright (C) 2002-2018 Aleph One Ltd. |
| * |
| * Created by Charles Manning <charles@aleph1.co.uk> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #ifndef __YAFFS_CACHE_H__ |
| #define __YAFFS_CACHE_H__ |
| |
| #include "yaffs_guts.h" |
| |
| |
| /* Does the object have a dirty cache ? */ |
| int yaffs_obj_cache_dirty(struct yaffs_obj *obj); |
| |
| /* Flush the cache associated with a file, either discarding or keeping */ |
| void yaffs_flush_file_cache(struct yaffs_obj *obj, int discard); |
| |
| /* Flush everything in the cache, either discarding or keeping */ |
| void yaffs_flush_whole_cache(struct yaffs_dev *dev, int discard); |
| |
| /* Grab a cache item during read or write. */ |
| struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev); |
| |
| /* Find a cached chunk */ |
| struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, |
| int chunk_id); |
| |
| /* Mark the chunk for the least recently used algorithym */ |
| void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, |
| int is_write); |
| |
| |
| /* Invalidate a single cache page. The cache no longer holds valid data. */ |
| void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, |
| int chunk_id); |
| |
| /* Invalidate all the cache pages associated with this object |
| * Do this whenever ther file is deleted or resized. |
| */ |
| void yaffs_invalidate_file_cache(struct yaffs_obj *in); |
| |
| |
| int yaffs_count_dirty_caches(struct yaffs_dev *dev); |
| |
| /* Init/deinit. */ |
| int yaffs_cache_init(struct yaffs_dev *dev); |
| void yaffs_cache_deinit(struct yaffs_dev *dev); |
| |
| #endif |
