18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 28c2ecf20Sopenharmony_ci/* -*- mode: c; c-basic-offset: 8; -*- 38c2ecf20Sopenharmony_ci * vim: noexpandtab sw=8 ts=8 sts=0: 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * refcounttree.h 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * Copyright (C) 2009 Oracle. All rights reserved. 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci#ifndef OCFS2_REFCOUNTTREE_H 108c2ecf20Sopenharmony_ci#define OCFS2_REFCOUNTTREE_H 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_cistruct ocfs2_refcount_tree { 138c2ecf20Sopenharmony_ci struct rb_node rf_node; 148c2ecf20Sopenharmony_ci u64 rf_blkno; 158c2ecf20Sopenharmony_ci u32 rf_generation; 168c2ecf20Sopenharmony_ci struct kref rf_getcnt; 178c2ecf20Sopenharmony_ci struct rw_semaphore rf_sem; 188c2ecf20Sopenharmony_ci struct ocfs2_lock_res rf_lockres; 198c2ecf20Sopenharmony_ci int rf_removed; 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci /* the following 4 fields are used by caching_info. */ 228c2ecf20Sopenharmony_ci spinlock_t rf_lock; 238c2ecf20Sopenharmony_ci struct ocfs2_caching_info rf_ci; 248c2ecf20Sopenharmony_ci struct mutex rf_io_mutex; 258c2ecf20Sopenharmony_ci struct super_block *rf_sb; 268c2ecf20Sopenharmony_ci}; 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_civoid ocfs2_purge_refcount_trees(struct ocfs2_super *osb); 298c2ecf20Sopenharmony_ciint ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw, 308c2ecf20Sopenharmony_ci struct ocfs2_refcount_tree **tree, 318c2ecf20Sopenharmony_ci struct buffer_head **ref_bh); 328c2ecf20Sopenharmony_civoid ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, 338c2ecf20Sopenharmony_ci struct ocfs2_refcount_tree *tree, 348c2ecf20Sopenharmony_ci int rw); 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ciint ocfs2_decrease_refcount(struct inode *inode, 378c2ecf20Sopenharmony_ci handle_t *handle, u32 cpos, u32 len, 388c2ecf20Sopenharmony_ci struct ocfs2_alloc_context *meta_ac, 398c2ecf20Sopenharmony_ci struct ocfs2_cached_dealloc_ctxt *dealloc, 408c2ecf20Sopenharmony_ci int delete); 418c2ecf20Sopenharmony_ciint ocfs2_prepare_refcount_change_for_del(struct inode *inode, 428c2ecf20Sopenharmony_ci u64 refcount_loc, 438c2ecf20Sopenharmony_ci u64 phys_blkno, 448c2ecf20Sopenharmony_ci u32 clusters, 458c2ecf20Sopenharmony_ci int *credits, 468c2ecf20Sopenharmony_ci int *ref_blocks); 478c2ecf20Sopenharmony_ciint ocfs2_refcount_cow(struct inode *inode, 488c2ecf20Sopenharmony_ci struct buffer_head *di_bh, 498c2ecf20Sopenharmony_ci u32 cpos, u32 write_len, u32 max_cpos); 508c2ecf20Sopenharmony_ci 518c2ecf20Sopenharmony_citypedef int (ocfs2_post_refcount_func)(struct inode *inode, 528c2ecf20Sopenharmony_ci handle_t *handle, 538c2ecf20Sopenharmony_ci void *para); 548c2ecf20Sopenharmony_ci/* 558c2ecf20Sopenharmony_ci * Some refcount caller need to do more work after we modify the data b-tree 568c2ecf20Sopenharmony_ci * during refcount operation(including CoW and add refcount flag), and make the 578c2ecf20Sopenharmony_ci * transaction complete. So it must give us this structure so that we can do it 588c2ecf20Sopenharmony_ci * within our transaction. 598c2ecf20Sopenharmony_ci * 608c2ecf20Sopenharmony_ci */ 618c2ecf20Sopenharmony_cistruct ocfs2_post_refcount { 628c2ecf20Sopenharmony_ci int credits; /* credits it need for journal. */ 638c2ecf20Sopenharmony_ci ocfs2_post_refcount_func *func; /* real function. */ 648c2ecf20Sopenharmony_ci void *para; 658c2ecf20Sopenharmony_ci}; 668c2ecf20Sopenharmony_ci 678c2ecf20Sopenharmony_ciint ocfs2_refcounted_xattr_delete_need(struct inode *inode, 688c2ecf20Sopenharmony_ci struct ocfs2_caching_info *ref_ci, 698c2ecf20Sopenharmony_ci struct buffer_head *ref_root_bh, 708c2ecf20Sopenharmony_ci struct ocfs2_xattr_value_root *xv, 718c2ecf20Sopenharmony_ci int *meta_add, int *credits); 728c2ecf20Sopenharmony_ciint ocfs2_refcount_cow_xattr(struct inode *inode, 738c2ecf20Sopenharmony_ci struct ocfs2_dinode *di, 748c2ecf20Sopenharmony_ci struct ocfs2_xattr_value_buf *vb, 758c2ecf20Sopenharmony_ci struct ocfs2_refcount_tree *ref_tree, 768c2ecf20Sopenharmony_ci struct buffer_head *ref_root_bh, 778c2ecf20Sopenharmony_ci u32 cpos, u32 write_len, 788c2ecf20Sopenharmony_ci struct ocfs2_post_refcount *post); 798c2ecf20Sopenharmony_ciint ocfs2_duplicate_clusters_by_page(handle_t *handle, 808c2ecf20Sopenharmony_ci struct inode *inode, 818c2ecf20Sopenharmony_ci u32 cpos, u32 old_cluster, 828c2ecf20Sopenharmony_ci u32 new_cluster, u32 new_len); 838c2ecf20Sopenharmony_ciint ocfs2_duplicate_clusters_by_jbd(handle_t *handle, 848c2ecf20Sopenharmony_ci struct inode *inode, 858c2ecf20Sopenharmony_ci u32 cpos, u32 old_cluster, 868c2ecf20Sopenharmony_ci u32 new_cluster, u32 new_len); 878c2ecf20Sopenharmony_ciint ocfs2_cow_sync_writeback(struct super_block *sb, 888c2ecf20Sopenharmony_ci struct inode *inode, 898c2ecf20Sopenharmony_ci u32 cpos, u32 num_clusters); 908c2ecf20Sopenharmony_ciint ocfs2_add_refcount_flag(struct inode *inode, 918c2ecf20Sopenharmony_ci struct ocfs2_extent_tree *data_et, 928c2ecf20Sopenharmony_ci struct ocfs2_caching_info *ref_ci, 938c2ecf20Sopenharmony_ci struct buffer_head *ref_root_bh, 948c2ecf20Sopenharmony_ci u32 cpos, u32 p_cluster, u32 num_clusters, 958c2ecf20Sopenharmony_ci struct ocfs2_cached_dealloc_ctxt *dealloc, 968c2ecf20Sopenharmony_ci struct ocfs2_post_refcount *post); 978c2ecf20Sopenharmony_ciint ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh); 988c2ecf20Sopenharmony_ciint ocfs2_try_remove_refcount_tree(struct inode *inode, 998c2ecf20Sopenharmony_ci struct buffer_head *di_bh); 1008c2ecf20Sopenharmony_ciint ocfs2_increase_refcount(handle_t *handle, 1018c2ecf20Sopenharmony_ci struct ocfs2_caching_info *ci, 1028c2ecf20Sopenharmony_ci struct buffer_head *ref_root_bh, 1038c2ecf20Sopenharmony_ci u64 cpos, u32 len, 1048c2ecf20Sopenharmony_ci struct ocfs2_alloc_context *meta_ac, 1058c2ecf20Sopenharmony_ci struct ocfs2_cached_dealloc_ctxt *dealloc); 1068c2ecf20Sopenharmony_ciint ocfs2_reflink_ioctl(struct inode *inode, 1078c2ecf20Sopenharmony_ci const char __user *oldname, 1088c2ecf20Sopenharmony_ci const char __user *newname, 1098c2ecf20Sopenharmony_ci bool preserve); 1108c2ecf20Sopenharmony_ciloff_t ocfs2_reflink_remap_blocks(struct inode *s_inode, 1118c2ecf20Sopenharmony_ci struct buffer_head *s_bh, 1128c2ecf20Sopenharmony_ci loff_t pos_in, 1138c2ecf20Sopenharmony_ci struct inode *t_inode, 1148c2ecf20Sopenharmony_ci struct buffer_head *t_bh, 1158c2ecf20Sopenharmony_ci loff_t pos_out, 1168c2ecf20Sopenharmony_ci loff_t len); 1178c2ecf20Sopenharmony_ciint ocfs2_reflink_inodes_lock(struct inode *s_inode, 1188c2ecf20Sopenharmony_ci struct buffer_head **bh1, 1198c2ecf20Sopenharmony_ci struct inode *t_inode, 1208c2ecf20Sopenharmony_ci struct buffer_head **bh2); 1218c2ecf20Sopenharmony_civoid ocfs2_reflink_inodes_unlock(struct inode *s_inode, 1228c2ecf20Sopenharmony_ci struct buffer_head *s_bh, 1238c2ecf20Sopenharmony_ci struct inode *t_inode, 1248c2ecf20Sopenharmony_ci struct buffer_head *t_bh); 1258c2ecf20Sopenharmony_ciint ocfs2_reflink_update_dest(struct inode *dest, 1268c2ecf20Sopenharmony_ci struct buffer_head *d_bh, 1278c2ecf20Sopenharmony_ci loff_t newlen); 1288c2ecf20Sopenharmony_ci 1298c2ecf20Sopenharmony_ci#endif /* OCFS2_REFCOUNTTREE_H */ 130