1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Cluster uptodate tracking
8 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
26 #ifndef OCFS2_UPTODATE_H
27 #define OCFS2_UPTODATE_H
30 * The caching code relies on locking provided by the user of
31 * struct ocfs2_caching_info. These operations connect that up.
33 struct ocfs2_caching_operations
{
35 * A u64 representing the owning structure. Usually this
36 * is the block number (i_blkno or whatnot). This is used so
37 * that caching log messages can identify the owning structure.
39 u64 (*co_owner
)(struct ocfs2_caching_info
*ci
);
41 /* The superblock is needed during I/O. */
42 struct super_block
*(*co_get_super
)(struct ocfs2_caching_info
*ci
);
44 * Lock and unlock the caching data. These will not sleep, and
45 * should probably be spinlocks.
47 void (*co_cache_lock
)(struct ocfs2_caching_info
*ci
);
48 void (*co_cache_unlock
)(struct ocfs2_caching_info
*ci
);
51 * Lock and unlock for disk I/O. These will sleep, and should
54 void (*co_io_lock
)(struct ocfs2_caching_info
*ci
);
55 void (*co_io_unlock
)(struct ocfs2_caching_info
*ci
);
58 int __init
init_ocfs2_uptodate_cache(void);
59 void exit_ocfs2_uptodate_cache(void);
61 void ocfs2_metadata_cache_init(struct ocfs2_caching_info
*ci
,
62 const struct ocfs2_caching_operations
*ops
);
63 void ocfs2_metadata_cache_purge(struct ocfs2_caching_info
*ci
);
64 void ocfs2_metadata_cache_exit(struct ocfs2_caching_info
*ci
);
66 u64
ocfs2_metadata_cache_owner(struct ocfs2_caching_info
*ci
);
67 void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info
*ci
);
68 void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info
*ci
);
70 int ocfs2_buffer_uptodate(struct ocfs2_caching_info
*ci
,
71 struct buffer_head
*bh
);
72 void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info
*ci
,
73 struct buffer_head
*bh
);
74 void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info
*ci
,
75 struct buffer_head
*bh
);
76 void ocfs2_remove_from_cache(struct ocfs2_caching_info
*ci
,
77 struct buffer_head
*bh
);
78 void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info
*ci
,
81 int ocfs2_buffer_read_ahead(struct ocfs2_caching_info
*ci
,
82 struct buffer_head
*bh
);
84 #endif /* OCFS2_UPTODATE_H */
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