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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_BKEY_METHODS_H
3#define _BCACHEFS_BKEY_METHODS_H
4
5#include "bkey.h"
6
7struct bch_fs;
8struct btree;
9struct btree_trans;
10struct bkey;
11enum btree_node_type;
12
13extern const char * const bch2_bkey_types[];
14extern const struct bkey_ops bch2_bkey_null_ops;
15
16/*
17 * key_validate: checks validity of @k, returns 0 if good or -EINVAL if bad. If
18 * invalid, entire key will be deleted.
19 *
20 * When invalid, error string is returned via @err. @rw indicates whether key is
21 * being read or written; more aggressive checks can be enabled when rw == WRITE.
22 */
23struct bkey_ops {
24 int (*key_validate)(struct bch_fs *c, struct bkey_s_c k,
25 struct bkey_validate_context from);
26 void (*val_to_text)(struct printbuf *, struct bch_fs *,
27 struct bkey_s_c);
28 void (*swab)(struct bkey_s);
29 bool (*key_normalize)(struct bch_fs *, struct bkey_s);
30 bool (*key_merge)(struct bch_fs *, struct bkey_s, struct bkey_s_c);
31 int (*trigger)(struct btree_trans *, enum btree_id, unsigned,
32 struct bkey_s_c, struct bkey_s,
33 enum btree_iter_update_trigger_flags);
34 void (*compat)(enum btree_id id, unsigned version,
35 unsigned big_endian, int write,
36 struct bkey_s);
37
38 /* Size of value type when first created: */
39 unsigned min_val_size;
40};
41
42extern const struct bkey_ops bch2_bkey_ops[];
43
44static inline const struct bkey_ops *bch2_bkey_type_ops(enum bch_bkey_type type)
45{
46 return likely(type < KEY_TYPE_MAX)
47 ? &bch2_bkey_ops[type]
48 : &bch2_bkey_null_ops;
49}
50
51int bch2_bkey_val_validate(struct bch_fs *, struct bkey_s_c,
52 struct bkey_validate_context);
53int __bch2_bkey_validate(struct bch_fs *, struct bkey_s_c,
54 struct bkey_validate_context);
55int bch2_bkey_validate(struct bch_fs *, struct bkey_s_c,
56 struct bkey_validate_context);
57int bch2_bkey_in_btree_node(struct bch_fs *, struct btree *, struct bkey_s_c,
58 struct bkey_validate_context from);
59
60void bch2_bpos_to_text(struct printbuf *, struct bpos);
61void bch2_bkey_to_text(struct printbuf *, const struct bkey *);
62void bch2_val_to_text(struct printbuf *, struct bch_fs *,
63 struct bkey_s_c);
64void bch2_bkey_val_to_text(struct printbuf *, struct bch_fs *,
65 struct bkey_s_c);
66
67void bch2_bkey_swab_val(struct bkey_s);
68
69bool bch2_bkey_normalize(struct bch_fs *, struct bkey_s);
70
71static inline bool bch2_bkey_maybe_mergable(const struct bkey *l, const struct bkey *r)
72{
73 return l->type == r->type &&
74 !bversion_cmp(l->bversion, r->bversion) &&
75 bpos_eq(l->p, bkey_start_pos(r));
76}
77
78bool bch2_bkey_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
79
80static inline int bch2_key_trigger(struct btree_trans *trans,
81 enum btree_id btree, unsigned level,
82 struct bkey_s_c old, struct bkey_s new,
83 enum btree_iter_update_trigger_flags flags)
84{
85 const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new.k->type);
86
87 return ops->trigger
88 ? ops->trigger(trans, btree, level, old, new, flags)
89 : 0;
90}
91
92static inline int bch2_key_trigger_old(struct btree_trans *trans,
93 enum btree_id btree_id, unsigned level,
94 struct bkey_s_c old,
95 enum btree_iter_update_trigger_flags flags)
96{
97 struct bkey_i deleted;
98
99 bkey_init(&deleted.k);
100 deleted.k.p = old.k->p;
101
102 return bch2_key_trigger(trans, btree_id, level, old, bkey_i_to_s(&deleted),
103 BTREE_TRIGGER_overwrite|flags);
104}
105
106static inline int bch2_key_trigger_new(struct btree_trans *trans,
107 enum btree_id btree_id, unsigned level,
108 struct bkey_s new,
109 enum btree_iter_update_trigger_flags flags)
110{
111 struct bkey_i deleted;
112
113 bkey_init(&deleted.k);
114 deleted.k.p = new.k->p;
115
116 return bch2_key_trigger(trans, btree_id, level, bkey_i_to_s_c(&deleted), new,
117 BTREE_TRIGGER_insert|flags);
118}
119
120void bch2_bkey_renumber(enum btree_node_type, struct bkey_packed *, int);
121
122void __bch2_bkey_compat(unsigned, enum btree_id, unsigned, unsigned,
123 int, struct bkey_format *, struct bkey_packed *);
124
125static inline void bch2_bkey_compat(unsigned level, enum btree_id btree_id,
126 unsigned version, unsigned big_endian,
127 int write,
128 struct bkey_format *f,
129 struct bkey_packed *k)
130{
131 if (version < bcachefs_metadata_version_current ||
132 big_endian != CPU_BIG_ENDIAN ||
133 IS_ENABLED(CONFIG_BCACHEFS_DEBUG))
134 __bch2_bkey_compat(level, btree_id, version,
135 big_endian, write, f, k);
136
137}
138
139#endif /* _BCACHEFS_BKEY_METHODS_H */