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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * suballoc.h |
4 | * | |
5 | * Defines sub allocator api | |
6 | * | |
7 | * Copyright (C) 2003, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
8 | */ |
9 | ||
10 | #ifndef _CHAINALLOC_H_ | |
11 | #define _CHAINALLOC_H_ | |
12 | ||
7d1fe093 | 13 | struct ocfs2_suballoc_result; |
ccd979bd MF |
14 | typedef int (group_search_t)(struct inode *, |
15 | struct buffer_head *, | |
1187c968 JB |
16 | u32, /* bits_wanted */ |
17 | u32, /* min_bits */ | |
18 | u64, /* max_block */ | |
7d1fe093 JB |
19 | struct ocfs2_suballoc_result *); |
20 | /* found bits */ | |
ccd979bd MF |
21 | |
22 | struct ocfs2_alloc_context { | |
23 | struct inode *ac_inode; /* which bitmap are we allocating from? */ | |
24 | struct buffer_head *ac_bh; /* file entry bh */ | |
a4a48911 | 25 | u32 ac_alloc_slot; /* which slot are we allocating from? */ |
ccd979bd MF |
26 | u32 ac_bits_wanted; |
27 | u32 ac_bits_given; | |
28 | #define OCFS2_AC_USE_LOCAL 1 | |
29 | #define OCFS2_AC_USE_MAIN 2 | |
30 | #define OCFS2_AC_USE_INODE 3 | |
31 | #define OCFS2_AC_USE_META 4 | |
32 | u32 ac_which; | |
ccd979bd MF |
33 | |
34 | /* these are used by the chain search */ | |
35 | u16 ac_chain; | |
309a85b6 | 36 | int ac_disable_chain_relink; |
ccd979bd | 37 | group_search_t *ac_group_search; |
883d4cae MF |
38 | |
39 | u64 ac_last_group; | |
1187c968 | 40 | u64 ac_max_block; /* Highest block number to allocate. 0 is |
7eba77d5 | 41 | the same as ~0 - unlimited */ |
d02f00cc | 42 | |
e49e2767 MF |
43 | int ac_find_loc_only; /* hack for reflink operation ordering */ |
44 | struct ocfs2_suballoc_result *ac_find_loc_priv; /* */ | |
45 | ||
d02f00cc | 46 | struct ocfs2_alloc_reservation *ac_resv; |
ccd979bd MF |
47 | }; |
48 | ||
b89c5428 | 49 | void ocfs2_init_steal_slots(struct ocfs2_super *osb); |
ccd979bd MF |
50 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac); |
51 | static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac) | |
52 | { | |
53 | return ac->ac_bits_wanted - ac->ac_bits_given; | |
54 | } | |
55 | ||
811f933d TM |
56 | /* |
57 | * Please note that the caller must make sure that root_el is the root | |
58 | * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise | |
59 | * the result may be wrong. | |
60 | */ | |
ccd979bd | 61 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
811f933d | 62 | struct ocfs2_extent_list *root_el, |
ccd979bd | 63 | struct ocfs2_alloc_context **ac); |
cf1d6c76 TY |
64 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
65 | int blocks, | |
66 | struct ocfs2_alloc_context **ac); | |
ccd979bd | 67 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
68 | struct ocfs2_alloc_context **ac); |
69 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, | |
ccd979bd MF |
70 | u32 bits_wanted, |
71 | struct ocfs2_alloc_context **ac); | |
72 | ||
0a2fcd89 YL |
73 | int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
74 | handle_t *handle, | |
75 | struct buffer_head *di_bh, | |
76 | u32 num_bits, | |
77 | u16 chain); | |
db66c715 YL |
78 | void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, |
79 | struct buffer_head *di_bh, | |
80 | u32 num_bits, | |
81 | u16 chain); | |
0a2fcd89 YL |
82 | int ocfs2_block_group_set_bits(handle_t *handle, |
83 | struct inode *alloc_inode, | |
84 | struct ocfs2_group_desc *bg, | |
85 | struct buffer_head *group_bh, | |
86 | unsigned int bit_off, | |
87 | unsigned int num_bits); | |
88 | ||
1ed9b777 | 89 | int ocfs2_claim_metadata(handle_t *handle, |
ccd979bd MF |
90 | struct ocfs2_alloc_context *ac, |
91 | u32 bits_wanted, | |
2b6cb576 | 92 | u64 *suballoc_loc, |
ccd979bd MF |
93 | u16 *suballoc_bit_start, |
94 | u32 *num_bits, | |
95 | u64 *blkno_start); | |
1ed9b777 | 96 | int ocfs2_claim_new_inode(handle_t *handle, |
13821151 TM |
97 | struct inode *dir, |
98 | struct buffer_head *parent_fe_bh, | |
ccd979bd | 99 | struct ocfs2_alloc_context *ac, |
2b6cb576 | 100 | u64 *suballoc_loc, |
ccd979bd MF |
101 | u16 *suballoc_bit, |
102 | u64 *fe_blkno); | |
1ed9b777 | 103 | int ocfs2_claim_clusters(handle_t *handle, |
ccd979bd MF |
104 | struct ocfs2_alloc_context *ac, |
105 | u32 min_clusters, | |
106 | u32 *cluster_start, | |
107 | u32 *num_clusters); | |
415cb800 MF |
108 | /* |
109 | * Use this variant of ocfs2_claim_clusters to specify a maxiumum | |
110 | * number of clusters smaller than the allocation reserved. | |
111 | */ | |
1ed9b777 | 112 | int __ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
113 | struct ocfs2_alloc_context *ac, |
114 | u32 min_clusters, | |
115 | u32 max_clusters, | |
116 | u32 *cluster_start, | |
117 | u32 *num_clusters); | |
ccd979bd | 118 | |
2b604351 MF |
119 | int ocfs2_free_suballoc_bits(handle_t *handle, |
120 | struct inode *alloc_inode, | |
121 | struct buffer_head *alloc_bh, | |
122 | unsigned int start_bit, | |
123 | u64 bg_blkno, | |
124 | unsigned int count); | |
1fabe148 | 125 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
126 | struct inode *inode_alloc_inode, |
127 | struct buffer_head *inode_alloc_bh, | |
128 | struct ocfs2_dinode *di); | |
1fabe148 | 129 | int ocfs2_free_clusters(handle_t *handle, |
ccd979bd MF |
130 | struct inode *bitmap_inode, |
131 | struct buffer_head *bitmap_bh, | |
132 | u64 start_blk, | |
133 | unsigned int num_clusters); | |
b4414eea MF |
134 | int ocfs2_release_clusters(handle_t *handle, |
135 | struct inode *bitmap_inode, | |
136 | struct buffer_head *bitmap_bh, | |
137 | u64 start_blk, | |
138 | unsigned int num_clusters); | |
ccd979bd | 139 | |
2b604351 MF |
140 | static inline u64 ocfs2_which_suballoc_group(u64 block, unsigned int bit) |
141 | { | |
142 | u64 group = block - (u64) bit; | |
143 | ||
144 | return group; | |
145 | } | |
146 | ||
ccd979bd MF |
147 | static inline u32 ocfs2_cluster_from_desc(struct ocfs2_super *osb, |
148 | u64 bg_blkno) | |
149 | { | |
150 | /* This should work for all block group descriptors as only | |
151 | * the 1st group descriptor of the cluster bitmap is | |
152 | * different. */ | |
153 | ||
154 | if (bg_blkno == osb->first_cluster_group_blkno) | |
155 | return 0; | |
156 | ||
157 | /* the rest of the block groups are located at the beginning | |
158 | * of their 1st cluster, so a direct translation just | |
159 | * works. */ | |
160 | return ocfs2_blocks_to_clusters(osb->sb, bg_blkno); | |
161 | } | |
162 | ||
163 | static inline int ocfs2_is_cluster_bitmap(struct inode *inode) | |
164 | { | |
165 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
166 | return osb->bitmap_blkno == OCFS2_I(inode)->ip_blkno; | |
167 | } | |
168 | ||
169 | /* This is for local alloc ONLY. Others should use the task-specific | |
170 | * apis above. */ | |
171 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
172 | struct ocfs2_alloc_context *ac); | |
9c7af40b | 173 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac); |
ccd979bd | 174 | |
d659072f TM |
175 | /* given a cluster offset, calculate which block group it belongs to |
176 | * and return that block offset. */ | |
177 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster); | |
178 | ||
57e3e797 | 179 | /* |
970e4936 | 180 | * By default, ocfs2_read_group_descriptor() calls ocfs2_error() when it |
57e3e797 | 181 | * finds a problem. A caller that wants to check a group descriptor |
970e4936 JB |
182 | * without going readonly should read the block with ocfs2_read_block[s]() |
183 | * and then checking it with this function. This is only resize, really. | |
184 | * Everyone else should be using ocfs2_read_group_descriptor(). | |
57e3e797 | 185 | */ |
970e4936 JB |
186 | int ocfs2_check_group_descriptor(struct super_block *sb, |
187 | struct ocfs2_dinode *di, | |
188 | struct buffer_head *bh); | |
68f64d47 JB |
189 | /* |
190 | * Read a group descriptor block into *bh. If *bh is NULL, a bh will be | |
191 | * allocated. This is a cached read. The descriptor will be validated with | |
192 | * ocfs2_validate_group_descriptor(). | |
193 | */ | |
194 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, | |
195 | u64 gd_blkno, struct buffer_head **bh); | |
57e3e797 | 196 | |
f99b9b7c | 197 | int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et, |
e7d4cb6b TM |
198 | u32 clusters_to_add, u32 extents_to_split, |
199 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 200 | struct ocfs2_alloc_context **meta_ac); |
6ca497a8 | 201 | |
202 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res); | |
e49e2767 MF |
203 | |
204 | ||
205 | ||
206 | /* | |
207 | * The following two interfaces are for ocfs2_create_inode_in_orphan(). | |
208 | */ | |
209 | int ocfs2_find_new_inode_loc(struct inode *dir, | |
210 | struct buffer_head *parent_fe_bh, | |
211 | struct ocfs2_alloc_context *ac, | |
212 | u64 *fe_blkno); | |
213 | ||
214 | int ocfs2_claim_new_inode_at_loc(handle_t *handle, | |
215 | struct inode *dir, | |
216 | struct ocfs2_alloc_context *ac, | |
217 | u64 *suballoc_loc, | |
218 | u16 *suballoc_bit, | |
219 | u64 di_blkno); | |
220 | ||
ccd979bd | 221 | #endif /* _CHAINALLOC_H_ */ |