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Update bcachefs sources to 50d6a25d9c bcachefs: Erasure coding fixes
[bcachefs-tools-debian] / libbcachefs / replicas.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_REPLICAS_H
3 #define _BCACHEFS_REPLICAS_H
4
5 #include "eytzinger.h"
6 #include "replicas_types.h"
7
8 void bch2_replicas_entry_sort(struct bch_replicas_entry *);
9 void bch2_replicas_entry_to_text(struct printbuf *,
10                                  struct bch_replicas_entry *);
11 void bch2_cpu_replicas_to_text(struct printbuf *, struct bch_replicas_cpu *);
12
13 static inline struct bch_replicas_entry *
14 cpu_replicas_entry(struct bch_replicas_cpu *r, unsigned i)
15 {
16         return (void *) r->entries + r->entry_size * i;
17 }
18
19 int bch2_replicas_entry_idx(struct bch_fs *,
20                             struct bch_replicas_entry *);
21
22 void bch2_devlist_to_replicas(struct bch_replicas_entry *,
23                               enum bch_data_type,
24                               struct bch_devs_list);
25 bool bch2_replicas_marked(struct bch_fs *, struct bch_replicas_entry *);
26 int bch2_mark_replicas(struct bch_fs *,
27                        struct bch_replicas_entry *);
28
29 struct replicas_delta {
30         s64                     delta;
31         struct bch_replicas_entry r;
32 } __packed;
33
34 struct replicas_delta_list {
35         unsigned                size;
36         unsigned                used;
37
38         struct                  {} memset_start;
39         u64                     nr_inodes;
40         u64                     persistent_reserved[BCH_REPLICAS_MAX];
41         struct                  {} memset_end;
42         struct replicas_delta   d[0];
43 };
44
45 static inline struct replicas_delta *
46 replicas_delta_next(struct replicas_delta *d)
47 {
48         return (void *) d + replicas_entry_bytes(&d->r) + 8;
49 }
50
51 int bch2_replicas_delta_list_mark(struct bch_fs *, struct replicas_delta_list *);
52
53 void bch2_bkey_to_replicas(struct bch_replicas_entry *, struct bkey_s_c);
54
55 static inline void bch2_replicas_entry_cached(struct bch_replicas_entry *e,
56                                               unsigned dev)
57 {
58         e->data_type    = BCH_DATA_cached;
59         e->nr_devs      = 1;
60         e->nr_required  = 1;
61         e->devs[0]      = dev;
62 }
63
64 bool bch2_have_enough_devs(struct bch_fs *, struct bch_devs_mask,
65                            unsigned, bool);
66
67 unsigned bch2_dev_has_data(struct bch_fs *, struct bch_dev *);
68
69 int bch2_replicas_gc_end(struct bch_fs *, int);
70 int bch2_replicas_gc_start(struct bch_fs *, unsigned);
71 int bch2_replicas_gc2(struct bch_fs *);
72
73 int bch2_replicas_set_usage(struct bch_fs *,
74                             struct bch_replicas_entry *,
75                             u64);
76
77 #define for_each_cpu_replicas_entry(_r, _i)                             \
78         for (_i = (_r)->entries;                                        \
79              (void *) (_i) < (void *) (_r)->entries + (_r)->nr * (_r)->entry_size;\
80              _i = (void *) (_i) + (_r)->entry_size)
81
82 /* iterate over superblock replicas - used by userspace tools: */
83
84 #define replicas_entry_next(_i)                                         \
85         ((typeof(_i)) ((void *) (_i) + replicas_entry_bytes(_i)))
86
87 #define for_each_replicas_entry(_r, _i)                                 \
88         for (_i = (_r)->entries;                                        \
89              (void *) (_i) < vstruct_end(&(_r)->field) && (_i)->data_type;\
90              (_i) = replicas_entry_next(_i))
91
92 #define for_each_replicas_entry_v0(_r, _i)                              \
93         for (_i = (_r)->entries;                                        \
94              (void *) (_i) < vstruct_end(&(_r)->field) && (_i)->data_type;\
95              (_i) = replicas_entry_next(_i))
96
97 int bch2_sb_replicas_to_cpu_replicas(struct bch_fs *);
98
99 extern const struct bch_sb_field_ops bch_sb_field_ops_replicas;
100 extern const struct bch_sb_field_ops bch_sb_field_ops_replicas_v0;
101
102 void bch2_fs_replicas_exit(struct bch_fs *);
103 int bch2_fs_replicas_init(struct bch_fs *);
104
105 #endif /* _BCACHEFS_REPLICAS_H */