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