| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * uptodate.h |
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| 4 | * |
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| 5 | * Cluster uptodate tracking |
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| 6 | * |
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| 7 | * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. |
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| 8 | */ |
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| 9 | |
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| 10 | #ifndef OCFS2_UPTODATE_H |
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| 11 | #define OCFS2_UPTODATE_H |
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| 12 | |
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| 13 | /* |
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| 14 | * The caching code relies on locking provided by the user of |
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| 15 | * struct ocfs2_caching_info. These operations connect that up. |
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| 16 | */ |
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| 17 | struct ocfs2_caching_operations { |
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| 18 | /* |
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| 19 | * A u64 representing the owning structure. Usually this |
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| 20 | * is the block number (i_blkno or whatnot). This is used so |
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| 21 | * that caching log messages can identify the owning structure. |
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| 22 | */ |
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| 23 | u64 (*co_owner)(struct ocfs2_caching_info *ci); |
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| 24 | |
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| 25 | /* The superblock is needed during I/O. */ |
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| 26 | struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci); |
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| 27 | /* |
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| 28 | * Lock and unlock the caching data. These will not sleep, and |
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| 29 | * should probably be spinlocks. |
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| 30 | */ |
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| 31 | void (*co_cache_lock)(struct ocfs2_caching_info *ci); |
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| 32 | void (*co_cache_unlock)(struct ocfs2_caching_info *ci); |
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| 33 | |
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| 34 | /* |
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| 35 | * Lock and unlock for disk I/O. These will sleep, and should |
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| 36 | * be mutexes. |
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| 37 | */ |
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| 38 | void (*co_io_lock)(struct ocfs2_caching_info *ci); |
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| 39 | void (*co_io_unlock)(struct ocfs2_caching_info *ci); |
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| 40 | }; |
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| 41 | |
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| 42 | int __init init_ocfs2_uptodate_cache(void); |
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| 43 | void exit_ocfs2_uptodate_cache(void); |
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| 44 | |
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| 45 | void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci, |
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| 46 | const struct ocfs2_caching_operations *ops); |
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| 47 | void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci); |
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| 48 | void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci); |
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| 49 | |
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| 50 | u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci); |
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| 51 | void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci); |
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| 52 | void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci); |
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| 53 | |
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| 54 | int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci, |
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| 55 | struct buffer_head *bh); |
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| 56 | void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci, |
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| 57 | struct buffer_head *bh); |
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| 58 | void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, |
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| 59 | struct buffer_head *bh); |
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| 60 | void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci, |
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| 61 | struct buffer_head *bh); |
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| 62 | void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, |
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| 63 | sector_t block, |
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| 64 | u32 c_len); |
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| 65 | int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, |
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| 66 | struct buffer_head *bh); |
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| 67 | |
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| 68 | #endif /* OCFS2_UPTODATE_H */ |
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| 69 | |
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