1/* SPDX-License-Identifier: GPL-2.0-or-later */ 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. 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 */ 19struct 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 44int __init init_ocfs2_uptodate_cache(void); 45void exit_ocfs2_uptodate_cache(void); 46 47void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci, 48 const struct ocfs2_caching_operations *ops); 49void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci); 50void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci); 51 52u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci); 53void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci); 54void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci); 55 56int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci, 57 struct buffer_head *bh); 58void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci, 59 struct buffer_head *bh); 60void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, 61 struct buffer_head *bh); 62void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci, 63 struct buffer_head *bh); 64void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, 65 sector_t block, 66 u32 c_len); 67int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, 68 struct buffer_head *bh); 69 70#endif /* OCFS2_UPTODATE_H */ 71