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

source code of linux/fs/bcachefs/journal_io.h