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1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * refcounttree.h
5 *
6 * Copyright (C) 2009 Oracle. All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public
10 * License version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17#ifndef OCFS2_REFCOUNTTREE_H
18#define OCFS2_REFCOUNTTREE_H
19
20struct ocfs2_refcount_tree {
21 struct rb_node rf_node;
22 u64 rf_blkno;
23 u32 rf_generation;
24 struct kref rf_getcnt;
25 struct rw_semaphore rf_sem;
26 struct ocfs2_lock_res rf_lockres;
27 int rf_removed;
28
29 /* the following 4 fields are used by caching_info. */
30 spinlock_t rf_lock;
31 struct ocfs2_caching_info rf_ci;
32 struct mutex rf_io_mutex;
33 struct super_block *rf_sb;
34};
35
36void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
37int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
38 struct ocfs2_refcount_tree **tree,
39 struct buffer_head **ref_bh);
40void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
41 struct ocfs2_refcount_tree *tree,
42 int rw);
43
44int ocfs2_decrease_refcount(struct inode *inode,
45 handle_t *handle, u32 cpos, u32 len,
46 struct ocfs2_alloc_context *meta_ac,
47 struct ocfs2_cached_dealloc_ctxt *dealloc,
48 int delete);
49int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
50 u64 refcount_loc,
51 u64 phys_blkno,
52 u32 clusters,
53 int *credits,
54 int *ref_blocks);
55int ocfs2_refcount_cow(struct inode *inode,
56 struct file *filep, struct buffer_head *di_bh,
57 u32 cpos, u32 write_len, u32 max_cpos);
58
59typedef int (ocfs2_post_refcount_func)(struct inode *inode,
60 handle_t *handle,
61 void *para);
62/*
63 * Some refcount caller need to do more work after we modify the data b-tree
64 * during refcount operation(including CoW and add refcount flag), and make the
65 * transaction complete. So it must give us this structure so that we can do it
66 * within our transaction.
67 *
68 */
69struct ocfs2_post_refcount {
70 int credits; /* credits it need for journal. */
71 ocfs2_post_refcount_func *func; /* real function. */
72 void *para;
73};
74
75int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
76 struct ocfs2_caching_info *ref_ci,
77 struct buffer_head *ref_root_bh,
78 struct ocfs2_xattr_value_root *xv,
79 int *meta_add, int *credits);
80int ocfs2_refcount_cow_xattr(struct inode *inode,
81 struct ocfs2_dinode *di,
82 struct ocfs2_xattr_value_buf *vb,
83 struct ocfs2_refcount_tree *ref_tree,
84 struct buffer_head *ref_root_bh,
85 u32 cpos, u32 write_len,
86 struct ocfs2_post_refcount *post);
87int ocfs2_duplicate_clusters_by_page(handle_t *handle,
88 struct file *file,
89 u32 cpos, u32 old_cluster,
90 u32 new_cluster, u32 new_len);
91int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
92 struct file *file,
93 u32 cpos, u32 old_cluster,
94 u32 new_cluster, u32 new_len);
95int ocfs2_cow_sync_writeback(struct super_block *sb,
96 struct inode *inode,
97 u32 cpos, u32 num_clusters);
98int ocfs2_add_refcount_flag(struct inode *inode,
99 struct ocfs2_extent_tree *data_et,
100 struct ocfs2_caching_info *ref_ci,
101 struct buffer_head *ref_root_bh,
102 u32 cpos, u32 p_cluster, u32 num_clusters,
103 struct ocfs2_cached_dealloc_ctxt *dealloc,
104 struct ocfs2_post_refcount *post);
105int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
106int ocfs2_try_remove_refcount_tree(struct inode *inode,
107 struct buffer_head *di_bh);
108int ocfs2_increase_refcount(handle_t *handle,
109 struct ocfs2_caching_info *ci,
110 struct buffer_head *ref_root_bh,
111 u64 cpos, u32 len,
112 struct ocfs2_alloc_context *meta_ac,
113 struct ocfs2_cached_dealloc_ctxt *dealloc);
114int ocfs2_reflink_ioctl(struct inode *inode,
115 const char __user *oldname,
116 const char __user *newname,
117 bool preserve);
118#endif /* OCFS2_REFCOUNTTREE_H */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * refcounttree.h
6 *
7 * Copyright (C) 2009 Oracle. All rights reserved.
8 */
9#ifndef OCFS2_REFCOUNTTREE_H
10#define OCFS2_REFCOUNTTREE_H
11
12struct ocfs2_refcount_tree {
13 struct rb_node rf_node;
14 u64 rf_blkno;
15 u32 rf_generation;
16 struct kref rf_getcnt;
17 struct rw_semaphore rf_sem;
18 struct ocfs2_lock_res rf_lockres;
19 int rf_removed;
20
21 /* the following 4 fields are used by caching_info. */
22 spinlock_t rf_lock;
23 struct ocfs2_caching_info rf_ci;
24 struct mutex rf_io_mutex;
25 struct super_block *rf_sb;
26};
27
28void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
29int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
30 struct ocfs2_refcount_tree **tree,
31 struct buffer_head **ref_bh);
32void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
33 struct ocfs2_refcount_tree *tree,
34 int rw);
35
36int ocfs2_decrease_refcount(struct inode *inode,
37 handle_t *handle, u32 cpos, u32 len,
38 struct ocfs2_alloc_context *meta_ac,
39 struct ocfs2_cached_dealloc_ctxt *dealloc,
40 int delete);
41int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
42 u64 refcount_loc,
43 u64 phys_blkno,
44 u32 clusters,
45 int *credits,
46 int *ref_blocks);
47int ocfs2_refcount_cow(struct inode *inode,
48 struct buffer_head *di_bh,
49 u32 cpos, u32 write_len, u32 max_cpos);
50
51typedef int (ocfs2_post_refcount_func)(struct inode *inode,
52 handle_t *handle,
53 void *para);
54/*
55 * Some refcount caller need to do more work after we modify the data b-tree
56 * during refcount operation(including CoW and add refcount flag), and make the
57 * transaction complete. So it must give us this structure so that we can do it
58 * within our transaction.
59 *
60 */
61struct ocfs2_post_refcount {
62 int credits; /* credits it need for journal. */
63 ocfs2_post_refcount_func *func; /* real function. */
64 void *para;
65};
66
67int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
68 struct ocfs2_caching_info *ref_ci,
69 struct buffer_head *ref_root_bh,
70 struct ocfs2_xattr_value_root *xv,
71 int *meta_add, int *credits);
72int ocfs2_refcount_cow_xattr(struct inode *inode,
73 struct ocfs2_dinode *di,
74 struct ocfs2_xattr_value_buf *vb,
75 struct ocfs2_refcount_tree *ref_tree,
76 struct buffer_head *ref_root_bh,
77 u32 cpos, u32 write_len,
78 struct ocfs2_post_refcount *post);
79int ocfs2_duplicate_clusters_by_page(handle_t *handle,
80 struct inode *inode,
81 u32 cpos, u32 old_cluster,
82 u32 new_cluster, u32 new_len);
83int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
84 struct inode *inode,
85 u32 cpos, u32 old_cluster,
86 u32 new_cluster, u32 new_len);
87int ocfs2_cow_sync_writeback(struct super_block *sb,
88 struct inode *inode,
89 u32 cpos, u32 num_clusters);
90int ocfs2_add_refcount_flag(struct inode *inode,
91 struct ocfs2_extent_tree *data_et,
92 struct ocfs2_caching_info *ref_ci,
93 struct buffer_head *ref_root_bh,
94 u32 cpos, u32 p_cluster, u32 num_clusters,
95 struct ocfs2_cached_dealloc_ctxt *dealloc,
96 struct ocfs2_post_refcount *post);
97int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
98int ocfs2_try_remove_refcount_tree(struct inode *inode,
99 struct buffer_head *di_bh);
100int ocfs2_increase_refcount(handle_t *handle,
101 struct ocfs2_caching_info *ci,
102 struct buffer_head *ref_root_bh,
103 u64 cpos, u32 len,
104 struct ocfs2_alloc_context *meta_ac,
105 struct ocfs2_cached_dealloc_ctxt *dealloc);
106int ocfs2_reflink_ioctl(struct inode *inode,
107 const char __user *oldname,
108 const char __user *newname,
109 bool preserve);
110loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
111 struct buffer_head *s_bh,
112 loff_t pos_in,
113 struct inode *t_inode,
114 struct buffer_head *t_bh,
115 loff_t pos_out,
116 loff_t len);
117int ocfs2_reflink_inodes_lock(struct inode *s_inode,
118 struct buffer_head **bh1,
119 struct inode *t_inode,
120 struct buffer_head **bh2);
121void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
122 struct buffer_head *s_bh,
123 struct inode *t_inode,
124 struct buffer_head *t_bh);
125int ocfs2_reflink_update_dest(struct inode *dest,
126 struct buffer_head *d_bh,
127 loff_t newlen);
128
129#endif /* OCFS2_REFCOUNTTREE_H */