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 | |