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26#ifndef _CHAINALLOC_H_
27#define _CHAINALLOC_H_
28
29struct ocfs2_suballoc_result;
30typedef int (group_search_t)(struct inode *,
31 struct buffer_head *,
32 u32,
33 u32,
34 u64,
35 struct ocfs2_suballoc_result *);
36
37
38struct ocfs2_alloc_context {
39 struct inode *ac_inode;
40 struct buffer_head *ac_bh;
41 u32 ac_alloc_slot;
42 u32 ac_bits_wanted;
43 u32 ac_bits_given;
44#define OCFS2_AC_USE_LOCAL 1
45#define OCFS2_AC_USE_MAIN 2
46#define OCFS2_AC_USE_INODE 3
47#define OCFS2_AC_USE_META 4
48 u32 ac_which;
49
50
51 u16 ac_chain;
52 int ac_disable_chain_relink;
53 group_search_t *ac_group_search;
54
55 u64 ac_last_group;
56 u64 ac_max_block;
57
58
59 int ac_find_loc_only;
60 struct ocfs2_suballoc_result *ac_find_loc_priv;
61
62 struct ocfs2_alloc_reservation *ac_resv;
63};
64
65void ocfs2_init_steal_slots(struct ocfs2_super *osb);
66void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac);
67static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
68{
69 return ac->ac_bits_wanted - ac->ac_bits_given;
70}
71
72
73
74
75
76
77int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
78 struct ocfs2_extent_list *root_el,
79 struct ocfs2_alloc_context **ac);
80int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
81 int blocks,
82 struct ocfs2_alloc_context **ac);
83int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
84 struct ocfs2_alloc_context **ac);
85int ocfs2_reserve_clusters(struct ocfs2_super *osb,
86 u32 bits_wanted,
87 struct ocfs2_alloc_context **ac);
88
89int ocfs2_alloc_dinode_update_counts(struct inode *inode,
90 handle_t *handle,
91 struct buffer_head *di_bh,
92 u32 num_bits,
93 u16 chain);
94void ocfs2_rollback_alloc_dinode_counts(struct inode *inode,
95 struct buffer_head *di_bh,
96 u32 num_bits,
97 u16 chain);
98int ocfs2_block_group_set_bits(handle_t *handle,
99 struct inode *alloc_inode,
100 struct ocfs2_group_desc *bg,
101 struct buffer_head *group_bh,
102 unsigned int bit_off,
103 unsigned int num_bits);
104
105int ocfs2_claim_metadata(handle_t *handle,
106 struct ocfs2_alloc_context *ac,
107 u32 bits_wanted,
108 u64 *suballoc_loc,
109 u16 *suballoc_bit_start,
110 u32 *num_bits,
111 u64 *blkno_start);
112int ocfs2_claim_new_inode(handle_t *handle,
113 struct inode *dir,
114 struct buffer_head *parent_fe_bh,
115 struct ocfs2_alloc_context *ac,
116 u64 *suballoc_loc,
117 u16 *suballoc_bit,
118 u64 *fe_blkno);
119int ocfs2_claim_clusters(handle_t *handle,
120 struct ocfs2_alloc_context *ac,
121 u32 min_clusters,
122 u32 *cluster_start,
123 u32 *num_clusters);
124
125
126
127
128int __ocfs2_claim_clusters(handle_t *handle,
129 struct ocfs2_alloc_context *ac,
130 u32 min_clusters,
131 u32 max_clusters,
132 u32 *cluster_start,
133 u32 *num_clusters);
134
135int ocfs2_free_suballoc_bits(handle_t *handle,
136 struct inode *alloc_inode,
137 struct buffer_head *alloc_bh,
138 unsigned int start_bit,
139 u64 bg_blkno,
140 unsigned int count);
141int ocfs2_free_dinode(handle_t *handle,
142 struct inode *inode_alloc_inode,
143 struct buffer_head *inode_alloc_bh,
144 struct ocfs2_dinode *di);
145int ocfs2_free_clusters(handle_t *handle,
146 struct inode *bitmap_inode,
147 struct buffer_head *bitmap_bh,
148 u64 start_blk,
149 unsigned int num_clusters);
150int ocfs2_release_clusters(handle_t *handle,
151 struct inode *bitmap_inode,
152 struct buffer_head *bitmap_bh,
153 u64 start_blk,
154 unsigned int num_clusters);
155
156static inline u64 ocfs2_which_suballoc_group(u64 block, unsigned int bit)
157{
158 u64 group = block - (u64) bit;
159
160 return group;
161}
162
163static inline u32 ocfs2_cluster_from_desc(struct ocfs2_super *osb,
164 u64 bg_blkno)
165{
166
167
168
169
170 if (bg_blkno == osb->first_cluster_group_blkno)
171 return 0;
172
173
174
175
176 return ocfs2_blocks_to_clusters(osb->sb, bg_blkno);
177}
178
179static inline int ocfs2_is_cluster_bitmap(struct inode *inode)
180{
181 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
182 return osb->bitmap_blkno == OCFS2_I(inode)->ip_blkno;
183}
184
185
186
187int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb,
188 struct ocfs2_alloc_context *ac);
189void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac);
190
191
192
193u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster);
194
195
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200
201
202int ocfs2_check_group_descriptor(struct super_block *sb,
203 struct ocfs2_dinode *di,
204 struct buffer_head *bh);
205
206
207
208
209
210int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di,
211 u64 gd_blkno, struct buffer_head **bh);
212
213int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et,
214 u32 clusters_to_add, u32 extents_to_split,
215 struct ocfs2_alloc_context **data_ac,
216 struct ocfs2_alloc_context **meta_ac);
217
218int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res);
219
220
221
222
223
224
225int ocfs2_find_new_inode_loc(struct inode *dir,
226 struct buffer_head *parent_fe_bh,
227 struct ocfs2_alloc_context *ac,
228 u64 *fe_blkno);
229
230int ocfs2_claim_new_inode_at_loc(handle_t *handle,
231 struct inode *dir,
232 struct ocfs2_alloc_context *ac,
233 u64 *suballoc_loc,
234 u16 *suballoc_bit,
235 u64 di_blkno);
236
237#endif
238