/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * uptodate.h * * Cluster uptodate tracking * * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #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 */ ve'/>
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