1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * refcounttree.h 4 * 5 * Copyright (C) 2009 Oracle. All rights reserved. 6 */ 7 #ifndef OCFS2_REFCOUNTTREE_H 8 #define OCFS2_REFCOUNTTREE_H 9 10 struct ocfs2_refcount_tree { 11 struct rb_node rf_node; 12 u64 rf_blkno; 13 u32 rf_generation; 14 struct kref rf_getcnt; 15 struct rw_semaphore rf_sem; 16 struct ocfs2_lock_res rf_lockres; 17 int rf_removed; 18 19 /* the following 4 fields are used by caching_info. */ 20 spinlock_t rf_lock; 21 struct ocfs2_caching_info rf_ci; 22 struct mutex rf_io_mutex; 23 struct super_block *rf_sb; 24 }; 25 26 void ocfs2_purge_refcount_trees(struct ocfs2_super *osb); 27 int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw, 28 struct ocfs2_refcount_tree **tree, 29 struct buffer_head **ref_bh); 30 void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, 31 struct ocfs2_refcount_tree *tree, 32 int rw); 33 34 int ocfs2_decrease_refcount(struct inode *inode, 35 handle_t *handle, u32 cpos, u32 len, 36 struct ocfs2_alloc_context *meta_ac, 37 struct ocfs2_cached_dealloc_ctxt *dealloc, 38 int delete); 39 int ocfs2_prepare_refcount_change_for_del(struct inode *inode, 40 u64 refcount_loc, 41 u64 phys_blkno, 42 u32 clusters, 43 int *credits, 44 int *ref_blocks); 45 int ocfs2_refcount_cow(struct inode *inode, 46 struct buffer_head *di_bh, 47 u32 cpos, u32 write_len, u32 max_cpos); 48 49 typedef int (ocfs2_post_refcount_func)(struct inode *inode, 50 handle_t *handle, 51 void *para); 52 /* 53 * Some refcount caller need to do more work after we modify the data b-tree 54 * during refcount operation(including CoW and add refcount flag), and make the 55 * transaction complete. So it must give us this structure so that we can do it 56 * within our transaction. 57 * 58 */ 59 struct ocfs2_post_refcount { 60 int credits; /* credits it need for journal. */ 61 ocfs2_post_refcount_func *func; /* real function. */ 62 void *para; 63 }; 64 65 int ocfs2_refcounted_xattr_delete_need(struct inode *inode, 66 struct ocfs2_caching_info *ref_ci, 67 struct buffer_head *ref_root_bh, 68 struct ocfs2_xattr_value_root *xv, 69 int *meta_add, int *credits); 70 int ocfs2_refcount_cow_xattr(struct inode *inode, 71 struct ocfs2_dinode *di, 72 struct ocfs2_xattr_value_buf *vb, 73 struct ocfs2_refcount_tree *ref_tree, 74 struct buffer_head *ref_root_bh, 75 u32 cpos, u32 write_len, 76 struct ocfs2_post_refcount *post); 77 int ocfs2_duplicate_clusters_by_page(handle_t *handle, 78 struct inode *inode, 79 u32 cpos, u32 old_cluster, 80 u32 new_cluster, u32 new_len); 81 int ocfs2_duplicate_clusters_by_jbd(handle_t *handle, 82 struct inode *inode, 83 u32 cpos, u32 old_cluster, 84 u32 new_cluster, u32 new_len); 85 int ocfs2_cow_sync_writeback(struct super_block *sb, 86 struct inode *inode, 87 u32 cpos, u32 num_clusters); 88 int ocfs2_add_refcount_flag(struct inode *inode, 89 struct ocfs2_extent_tree *data_et, 90 struct ocfs2_caching_info *ref_ci, 91 struct buffer_head *ref_root_bh, 92 u32 cpos, u32 p_cluster, u32 num_clusters, 93 struct ocfs2_cached_dealloc_ctxt *dealloc, 94 struct ocfs2_post_refcount *post); 95 int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh); 96 int ocfs2_try_remove_refcount_tree(struct inode *inode, 97 struct buffer_head *di_bh); 98 int ocfs2_increase_refcount(handle_t *handle, 99 struct ocfs2_caching_info *ci, 100 struct buffer_head *ref_root_bh, 101 u64 cpos, u32 len, 102 struct ocfs2_alloc_context *meta_ac, 103 struct ocfs2_cached_dealloc_ctxt *dealloc); 104 int ocfs2_reflink_ioctl(struct inode *inode, 105 const char __user *oldname, 106 const char __user *newname, 107 bool preserve); 108 loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode, 109 struct buffer_head *s_bh, 110 loff_t pos_in, 111 struct inode *t_inode, 112 struct buffer_head *t_bh, 113 loff_t pos_out, 114 loff_t len); 115 int ocfs2_reflink_inodes_lock(struct inode *s_inode, 116 struct buffer_head **bh1, 117 struct inode *t_inode, 118 struct buffer_head **bh2); 119 void ocfs2_reflink_inodes_unlock(struct inode *s_inode, 120 struct buffer_head *s_bh, 121 struct inode *t_inode, 122 struct buffer_head *t_bh); 123 int ocfs2_reflink_update_dest(struct inode *dest, 124 struct buffer_head *d_bh, 125 loff_t newlen); 126 127 #endif /* OCFS2_REFCOUNTTREE_H */ 128