mirror of https://github.com/OpenIPC/firmware.git
61 lines
1.9 KiB
Diff
61 lines
1.9 KiB
Diff
diff -drupN a/fs/yaffs2/yaffs_cache.h b/fs/yaffs2/yaffs_cache.h
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--- a/fs/yaffs2/yaffs_cache.h 1970-01-01 03:00:00.000000000 +0300
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+++ b/fs/yaffs2/yaffs_cache.h 2022-06-09 05:02:35.000000000 +0300
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@@ -0,0 +1,56 @@
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+/*
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+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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+ *
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+ * Copyright (C) 2002-2018 Aleph One Ltd.
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+ *
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+ * Created by Charles Manning <charles@aleph1.co.uk>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#ifndef __YAFFS_CACHE_H__
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+#define __YAFFS_CACHE_H__
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+
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+#include "yaffs_guts.h"
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+
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+
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+/* Does the object have a dirty cache ? */
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+int yaffs_obj_cache_dirty(struct yaffs_obj *obj);
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+
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+/* Flush the cache associated with a file, either discarding or keeping */
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+void yaffs_flush_file_cache(struct yaffs_obj *obj, int discard);
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+
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+/* Flush everything in the cache, either discarding or keeping */
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+void yaffs_flush_whole_cache(struct yaffs_dev *dev, int discard);
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+
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+/* Grab a cache item during read or write. */
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+struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev);
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+
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+/* Find a cached chunk */
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+struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
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+ int chunk_id);
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+
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+/* Mark the chunk for the least recently used algorithym */
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+void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache,
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+ int is_write);
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+
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+
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+/* Invalidate a single cache page. The cache no longer holds valid data. */
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+void yaffs_invalidate_chunk_cache(struct yaffs_obj *object,
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+ int chunk_id);
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+
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+/* Invalidate all the cache pages associated with this object
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+ * Do this whenever ther file is deleted or resized.
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+ */
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+void yaffs_invalidate_file_cache(struct yaffs_obj *in);
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+
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+
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+int yaffs_count_dirty_caches(struct yaffs_dev *dev);
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+
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+/* Init/deinit. */
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+int yaffs_cache_init(struct yaffs_dev *dev);
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+void yaffs_cache_deinit(struct yaffs_dev *dev);
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+
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+#endif
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