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-rw-r--r--fs/ocfs2/uptodate.h68
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diff --git a/fs/ocfs2/uptodate.h b/fs/ocfs2/uptodate.h
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * uptodate.h
+ *
+ * Cluster uptodate tracking
+ *
+ * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
+ */
+
+#ifndef OCFS2_UPTODATE_H
+#define OCFS2_UPTODATE_H
+
+/*
+ * The caching code relies on locking provided by the user of
+ * struct ocfs2_caching_info. These operations connect that up.
+ */
+struct ocfs2_caching_operations {
+ /*
+ * A u64 representing the owning structure. Usually this
+ * is the block number (i_blkno or whatnot). This is used so
+ * that caching log messages can identify the owning structure.
+ */
+ u64 (*co_owner)(struct ocfs2_caching_info *ci);
+
+ /* The superblock is needed during I/O. */
+ struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
+ /*
+ * Lock and unlock the caching data. These will not sleep, and
+ * should probably be spinlocks.
+ */
+ void (*co_cache_lock)(struct ocfs2_caching_info *ci);
+ void (*co_cache_unlock)(struct ocfs2_caching_info *ci);
+
+ /*
+ * Lock and unlock for disk I/O. These will sleep, and should
+ * be mutexes.
+ */
+ void (*co_io_lock)(struct ocfs2_caching_info *ci);
+ void (*co_io_unlock)(struct ocfs2_caching_info *ci);
+};
+
+int __init init_ocfs2_uptodate_cache(void);
+void exit_ocfs2_uptodate_cache(void);
+
+void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
+ const struct ocfs2_caching_operations *ops);
+void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
+
+u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
+
+int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh);
+void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh);
+void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh);
+void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh);
+void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
+ sector_t block,
+ u32 c_len);
+int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
+ struct buffer_head *bh);
+
+#endif /* OCFS2_UPTODATE_H */