| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 3 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 4 | * |
| 5 | * uptodate.h |
| 6 | * |
| 7 | * Cluster uptodate tracking |
| 8 | * |
| 9 | * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #ifndef OCFS2_UPTODATE_H |
| 13 | #define OCFS2_UPTODATE_H |
| 14 | |
| 15 | /* |
| 16 | * The caching code relies on locking provided by the user of |
| 17 | * struct ocfs2_caching_info. These operations connect that up. |
| 18 | */ |
| 19 | struct ocfs2_caching_operations { |
| 20 | /* |
| 21 | * A u64 representing the owning structure. Usually this |
| 22 | * is the block number (i_blkno or whatnot). This is used so |
| 23 | * that caching log messages can identify the owning structure. |
| 24 | */ |
| 25 | u64 (*co_owner)(struct ocfs2_caching_info *ci); |
| 26 | |
| 27 | /* The superblock is needed during I/O. */ |
| 28 | struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci); |
| 29 | /* |
| 30 | * Lock and unlock the caching data. These will not sleep, and |
| 31 | * should probably be spinlocks. |
| 32 | */ |
| 33 | void (*co_cache_lock)(struct ocfs2_caching_info *ci); |
| 34 | void (*co_cache_unlock)(struct ocfs2_caching_info *ci); |
| 35 | |
| 36 | /* |
| 37 | * Lock and unlock for disk I/O. These will sleep, and should |
| 38 | * be mutexes. |
| 39 | */ |
| 40 | void (*co_io_lock)(struct ocfs2_caching_info *ci); |
| 41 | void (*co_io_unlock)(struct ocfs2_caching_info *ci); |
| 42 | }; |
| 43 | |
| 44 | int __init init_ocfs2_uptodate_cache(void); |
| 45 | void exit_ocfs2_uptodate_cache(void); |
| 46 | |
| 47 | void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci, |
| 48 | const struct ocfs2_caching_operations *ops); |
| 49 | void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci); |
| 50 | void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci); |
| 51 | |
| 52 | u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci); |
| 53 | void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci); |
| 54 | void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci); |
| 55 | |
| 56 | int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci, |
| 57 | struct buffer_head *bh); |
| 58 | void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci, |
| 59 | struct buffer_head *bh); |
| 60 | void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, |
| 61 | struct buffer_head *bh); |
| 62 | void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci, |
| 63 | struct buffer_head *bh); |
| 64 | void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, |
| 65 | sector_t block, |
| 66 | u32 c_len); |
| 67 | int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, |
| 68 | struct buffer_head *bh); |
| 69 | |
| 70 | #endif /* OCFS2_UPTODATE_H */ |