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8dec98ed TM |
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 | ||
20 | struct ocfs2_refcount_tree { | |
21 | struct rb_node rf_node; | |
22 | u64 rf_blkno; | |
23 | u32 rf_generation; | |
24 | struct rw_semaphore rf_sem; | |
25 | struct ocfs2_lock_res rf_lockres; | |
26 | struct kref rf_getcnt; | |
27 | int rf_removed; | |
28 | ||
29 | /* the following 4 fields are used by caching_info. */ | |
30 | struct ocfs2_caching_info rf_ci; | |
31 | spinlock_t rf_lock; | |
32 | struct mutex rf_io_mutex; | |
33 | struct super_block *rf_sb; | |
34 | }; | |
35 | ||
374a263e TM |
36 | void ocfs2_purge_refcount_trees(struct ocfs2_super *osb); |
37 | int 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); | |
40 | void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, | |
41 | struct ocfs2_refcount_tree *tree, | |
42 | int rw); | |
1823cb0b TM |
43 | |
44 | int ocfs2_decrease_refcount(struct inode *inode, | |
45 | handle_t *handle, u32 cpos, u32 len, | |
46 | struct ocfs2_alloc_context *meta_ac, | |
6ae23c55 TM |
47 | struct ocfs2_cached_dealloc_ctxt *dealloc, |
48 | int delete); | |
bcbbb24a TM |
49 | int ocfs2_prepare_refcount_change_for_del(struct inode *inode, |
50 | struct buffer_head *di_bh, | |
51 | u64 phys_blkno, | |
52 | u32 clusters, | |
53 | int *credits, | |
54 | struct ocfs2_alloc_context **meta_ac); | |
6f70fa51 | 55 | int ocfs2_refcount_cow(struct inode *inode, struct buffer_head *di_bh, |
37f8a2bf | 56 | u32 cpos, u32 write_len, u32 max_cpos); |
492a8a33 TM |
57 | |
58 | typedef int (ocfs2_post_refcount_func)(struct inode *inode, | |
59 | handle_t *handle, | |
60 | void *para); | |
61 | /* | |
62 | * Some refcount caller need to do more work after we modify the data b-tree | |
63 | * during refcount operation(including CoW and add refcount flag), and make the | |
64 | * transaction complete. So it must give us this structure so that we can do it | |
65 | * within our transaction. | |
66 | * | |
67 | */ | |
68 | struct ocfs2_post_refcount { | |
69 | int credits; /* credits it need for journal. */ | |
70 | ocfs2_post_refcount_func *func; /* real function. */ | |
71 | void *para; | |
72 | }; | |
73 | ||
74 | int ocfs2_refcounted_xattr_delete_need(struct inode *inode, | |
75 | struct ocfs2_caching_info *ref_ci, | |
76 | struct buffer_head *ref_root_bh, | |
77 | struct ocfs2_xattr_value_root *xv, | |
78 | int *meta_add, int *credits); | |
79 | int ocfs2_refcount_cow_xattr(struct inode *inode, | |
80 | struct ocfs2_dinode *di, | |
81 | struct ocfs2_xattr_value_buf *vb, | |
82 | struct ocfs2_refcount_tree *ref_tree, | |
83 | struct buffer_head *ref_root_bh, | |
84 | u32 cpos, u32 write_len, | |
85 | struct ocfs2_post_refcount *post); | |
0129241e TM |
86 | int ocfs2_add_refcount_flag(struct inode *inode, |
87 | struct ocfs2_extent_tree *data_et, | |
88 | struct ocfs2_caching_info *ref_ci, | |
89 | struct buffer_head *ref_root_bh, | |
90 | u32 cpos, u32 p_cluster, u32 num_clusters, | |
91 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
92 | struct ocfs2_post_refcount *post); | |
8b2c0dba TM |
93 | int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh); |
94 | int ocfs2_try_remove_refcount_tree(struct inode *inode, | |
95 | struct buffer_head *di_bh); | |
2999d12f TM |
96 | int ocfs2_increase_refcount(handle_t *handle, |
97 | struct ocfs2_caching_info *ci, | |
98 | struct buffer_head *ref_root_bh, | |
99 | u64 cpos, u32 len, | |
100 | struct ocfs2_alloc_context *meta_ac, | |
101 | struct ocfs2_cached_dealloc_ctxt *dealloc); | |
bd50873d TM |
102 | int ocfs2_reflink_ioctl(struct inode *inode, |
103 | const char __user *oldname, | |
104 | const char __user *newname, | |
105 | bool preserve); | |
8dec98ed | 106 | #endif /* OCFS2_REFCOUNTTREE_H */ |