85 lines
3 KiB
C
85 lines
3 KiB
C
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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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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