1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_JOURNAL_IO_H
3 #define _BCACHEFS_JOURNAL_IO_H
4
5 #include "darray.h"
6
7 void bch2_journal_pos_from_member_info_set(struct bch_fs *);
8 void bch2_journal_pos_from_member_info_resume(struct bch_fs *);
9
10 struct journal_ptr {
11 bool csum_good;
12 u8 dev;
13 u32 bucket;
14 u32 bucket_offset;
15 u64 sector;
16 };
17
18 /*
19 * Only used for holding the journal entries we read in btree_journal_read()
20 * during cache_registration
21 */
22 struct journal_replay {
23 DARRAY_PREALLOCATED(struct journal_ptr, 8) ptrs;
24
25 bool csum_good;
26 bool ignore_blacklisted;
27 bool ignore_not_dirty;
28 /* must be last: */
29 struct jset j;
30 };
31
32 static inline bool journal_replay_ignore(struct journal_replay *i)
33 {
34 return !i || i->ignore_blacklisted || i->ignore_not_dirty;
35 }
36
37 static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
38 struct jset_entry *entry, unsigned type)
39 {
40 while (entry < vstruct_last(jset)) {
41 if (entry->type == type)
42 return entry;
43
44 entry = vstruct_next(entry);
45 }
46
47 return NULL;
48 }
49
50 #define for_each_jset_entry_type(entry, jset, type) \
51 for (struct jset_entry *entry = (jset)->start; \
52 (entry = __jset_entry_type_next(jset, entry, type)); \
53 entry = vstruct_next(entry))
54
55 #define jset_entry_for_each_key(_e, _k) \
56 for (struct bkey_i *_k = (_e)->start; \
57 _k < vstruct_last(_e); \
58 _k = bkey_next(_k))
59
60 #define for_each_jset_key(k, entry, jset) \
61 for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)\
62 jset_entry_for_each_key(entry, k)
63
64 int bch2_journal_entry_validate(struct bch_fs *, struct jset *,
65 struct jset_entry *, unsigned, int,
66 enum bch_validate_flags);
67 void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
68 struct jset_entry *);
69
70 void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
71 struct journal_replay *);
72
73 int bch2_journal_read(struct bch_fs *, u64 *, u64 *, u64 *);
74
75 CLOSURE_CALLBACK(bch2_journal_write);
76
77 static inline struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
78 {
79 struct jset_entry *entry = *end;
80 unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
81
82 memset(entry, 0, u64s * sizeof(u64));
83 /*
84 * The u64s field counts from the start of data, ignoring the shared
85 * fields.
86 */
87 entry->u64s = cpu_to_le16(u64s - 1);
88
89 *end = vstruct_next(*end);
90 return entry;
91 }
92
93 #endif /* _BCACHEFS_JOURNAL_IO_H */
94
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