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Update bcachefs sources to a9f14c773f bcachefs: More btree gc refactorings
[bcachefs-tools-debian] / libbcachefs / io.h
1 #ifndef _BCACHEFS_IO_H
2 #define _BCACHEFS_IO_H
3
4 #include "checksum.h"
5 #include "io_types.h"
6
7 #define to_wbio(_bio)                   \
8         container_of((_bio), struct bch_write_bio, bio)
9
10 #define to_rbio(_bio)                   \
11         container_of((_bio), struct bch_read_bio, bio)
12
13 void bch2_bio_free_pages_pool(struct bch_fs *, struct bio *);
14 void bch2_bio_alloc_pages_pool(struct bch_fs *, struct bio *, size_t);
15 void bch2_bio_alloc_more_pages_pool(struct bch_fs *, struct bio *, size_t);
16
17 void bch2_latency_acct(struct bch_dev *, u64, int);
18
19 void bch2_submit_wbio_replicas(struct bch_write_bio *, struct bch_fs *,
20                                enum bch_data_type, const struct bkey_i *);
21
22 #define BLK_STS_REMOVED         ((__force blk_status_t)128)
23
24 enum bch_write_flags {
25         BCH_WRITE_ALLOC_NOWAIT          = (1 << 0),
26         BCH_WRITE_CACHED                = (1 << 1),
27         BCH_WRITE_FLUSH                 = (1 << 2),
28         BCH_WRITE_DATA_ENCODED          = (1 << 3),
29         BCH_WRITE_PAGES_STABLE          = (1 << 4),
30         BCH_WRITE_PAGES_OWNED           = (1 << 5),
31         BCH_WRITE_ONLY_SPECIFIED_DEVS   = (1 << 6),
32         BCH_WRITE_NOPUT_RESERVATION     = (1 << 7),
33
34         /* Internal: */
35         BCH_WRITE_JOURNAL_SEQ_PTR       = (1 << 8),
36 };
37
38 static inline u64 *op_journal_seq(struct bch_write_op *op)
39 {
40         return (op->flags & BCH_WRITE_JOURNAL_SEQ_PTR)
41                 ? op->journal_seq_p : &op->journal_seq;
42 }
43
44 static inline void op_journal_seq_set(struct bch_write_op *op, u64 *journal_seq)
45 {
46         op->journal_seq_p = journal_seq;
47         op->flags |= BCH_WRITE_JOURNAL_SEQ_PTR;
48 }
49
50 static inline struct workqueue_struct *index_update_wq(struct bch_write_op *op)
51 {
52         return op->alloc_reserve == RESERVE_MOVINGGC
53                 ? op->c->copygc_wq
54                 : op->c->wq;
55 }
56
57 int bch2_write_index_default(struct bch_write_op *);
58
59 static inline void bch2_write_op_init(struct bch_write_op *op, struct bch_fs *c,
60                                       struct bch_io_opts opts)
61 {
62         op->c                   = c;
63         op->io_wq               = index_update_wq(op);
64         op->flags               = 0;
65         op->written             = 0;
66         op->error               = 0;
67         op->csum_type           = bch2_data_checksum_type(c, opts.data_checksum);
68         op->compression_type    = bch2_compression_opt_to_type[opts.compression];
69         op->nr_replicas         = 0;
70         op->nr_replicas_required = c->opts.data_replicas_required;
71         op->alloc_reserve       = RESERVE_NONE;
72         op->open_buckets.nr     = 0;
73         op->devs_have.nr        = 0;
74         op->target              = 0;
75         op->opts                = opts;
76         op->pos                 = POS_MAX;
77         op->version             = ZERO_VERSION;
78         op->write_point         = (struct write_point_specifier) { 0 };
79         op->res                 = (struct disk_reservation) { 0 };
80         op->journal_seq         = 0;
81         op->index_update_fn     = bch2_write_index_default;
82 }
83
84 void bch2_write(struct closure *);
85
86 static inline struct bch_write_bio *wbio_init(struct bio *bio)
87 {
88         struct bch_write_bio *wbio = to_wbio(bio);
89
90         memset(wbio, 0, offsetof(struct bch_write_bio, bio));
91         return wbio;
92 }
93
94 struct bch_devs_mask;
95 struct cache_promote_op;
96 struct extent_ptr_decoded;
97
98 int __bch2_read_extent(struct bch_fs *, struct bch_read_bio *, struct bvec_iter,
99                        struct bkey_s_c, struct bch_io_failures *, unsigned);
100 void bch2_read(struct bch_fs *, struct bch_read_bio *, u64);
101
102 enum bch_read_flags {
103         BCH_READ_RETRY_IF_STALE         = 1 << 0,
104         BCH_READ_MAY_PROMOTE            = 1 << 1,
105         BCH_READ_USER_MAPPED            = 1 << 2,
106         BCH_READ_NODECODE               = 1 << 3,
107         BCH_READ_LAST_FRAGMENT          = 1 << 4,
108
109         /* internal: */
110         BCH_READ_MUST_BOUNCE            = 1 << 5,
111         BCH_READ_MUST_CLONE             = 1 << 6,
112         BCH_READ_IN_RETRY               = 1 << 7,
113 };
114
115 static inline void bch2_read_extent(struct bch_fs *c,
116                                     struct bch_read_bio *rbio,
117                                     struct bkey_s_c k,
118                                     unsigned flags)
119 {
120         __bch2_read_extent(c, rbio, rbio->bio.bi_iter, k, NULL, flags);
121 }
122
123 static inline struct bch_read_bio *rbio_init(struct bio *bio,
124                                              struct bch_io_opts opts)
125 {
126         struct bch_read_bio *rbio = to_rbio(bio);
127
128         rbio->_state    = 0;
129         rbio->promote   = NULL;
130         rbio->opts      = opts;
131         return rbio;
132 }
133
134 void bch2_fs_io_exit(struct bch_fs *);
135 int bch2_fs_io_init(struct bch_fs *);
136
137 #endif /* _BCACHEFS_IO_H */