git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_IO_H
   3 #define _BCACHEFS_IO_H
   4
   5 #include "checksum.h"
   6 #include "io_types.h"
   7
   8 #define to_wbio(_bio)                   \
   9         container_of((_bio), struct bch_write_bio, bio)
  10
  11 #define to_rbio(_bio)                   \
  12         container_of((_bio), struct bch_read_bio, bio)
  13
  14 void bch2_bio_free_pages_pool(struct bch_fs *, struct bio *);
  15 void bch2_bio_alloc_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         BCH_WRITE_WROTE_DATA_INLINE     = (1 << 8),
  34         BCH_WRITE_FROM_INTERNAL         = (1 << 9),
  35
  36         /* Internal: */
  37         BCH_WRITE_JOURNAL_SEQ_PTR       = (1 << 10),
  38         BCH_WRITE_SKIP_CLOSURE_PUT      = (1 << 11),
  39 };
  40
  41 static inline u64 *op_journal_seq(struct bch_write_op *op)
  42 {
  43         return (op->flags & BCH_WRITE_JOURNAL_SEQ_PTR)
  44                 ? op->journal_seq_p : &op->journal_seq;
  45 }
  46
  47 static inline void op_journal_seq_set(struct bch_write_op *op, u64 *journal_seq)
  48 {
  49         op->journal_seq_p = journal_seq;
  50         op->flags |= BCH_WRITE_JOURNAL_SEQ_PTR;
  51 }
  52
  53 static inline struct workqueue_struct *index_update_wq(struct bch_write_op *op)
  54 {
  55         return op->alloc_reserve == RESERVE_MOVINGGC
  56                 ? op->c->copygc_wq
  57                 : op->c->wq;
  58 }
  59
  60 int bch2_extent_update(struct btree_trans *, struct btree_iter *,
  61                        struct bkey_i *, struct disk_reservation *,
  62                        u64 *, u64, s64 *);
  63 int bch2_fpunch_at(struct btree_trans *, struct btree_iter *,
  64                    struct bpos, u64 *, s64 *);
  65 int bch2_fpunch(struct bch_fs *c, u64, u64, u64, u64 *, s64 *);
  66
  67 int bch2_write_index_default(struct bch_write_op *);
  68
  69 static inline void bch2_write_op_init(struct bch_write_op *op, struct bch_fs *c,
  70                                       struct bch_io_opts opts)
  71 {
  72         op->c                   = c;
  73         op->end_io              = NULL;
  74         op->flags               = 0;
  75         op->written             = 0;
  76         op->error               = 0;
  77         op->csum_type           = bch2_data_checksum_type(c, opts.data_checksum);
  78         op->compression_type    = bch2_compression_opt_to_type[opts.compression];
  79         op->nr_replicas         = 0;
  80         op->nr_replicas_required = c->opts.data_replicas_required;
  81         op->alloc_reserve       = RESERVE_NONE;
  82         op->incompressible      = 0;
  83         op->open_buckets.nr     = 0;
  84         op->devs_have.nr        = 0;
  85         op->target              = 0;
  86         op->opts                = opts;
  87         op->pos                 = POS_MAX;
  88         op->version             = ZERO_VERSION;
  89         op->write_point         = (struct write_point_specifier) { 0 };
  90         op->res                 = (struct disk_reservation) { 0 };
  91         op->journal_seq         = 0;
  92         op->new_i_size          = U64_MAX;
  93         op->i_sectors_delta     = 0;
  94         op->index_update_fn     = bch2_write_index_default;
  95 }
  96
  97 void bch2_write(struct closure *);
  98
  99 static inline struct bch_write_bio *wbio_init(struct bio *bio)
 100 {
 101         struct bch_write_bio *wbio = to_wbio(bio);
 102
 103         memset(wbio, 0, offsetof(struct bch_write_bio, bio));
 104         return wbio;
 105 }
 106
 107 struct bch_devs_mask;
 108 struct cache_promote_op;
 109 struct extent_ptr_decoded;
 110
 111 int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
 112                                 struct bkey_i *);
 113
 114 static inline int bch2_read_indirect_extent(struct btree_trans *trans,
 115                                             unsigned *offset_into_extent,
 116                                             struct bkey_i *k)
 117 {
 118         return k->k.type == KEY_TYPE_reflink_p
 119                 ? __bch2_read_indirect_extent(trans, offset_into_extent, k)
 120                 : 0;
 121 }
 122
 123 enum bch_read_flags {
 124         BCH_READ_RETRY_IF_STALE         = 1 << 0,
 125         BCH_READ_MAY_PROMOTE            = 1 << 1,
 126         BCH_READ_USER_MAPPED            = 1 << 2,
 127         BCH_READ_NODECODE               = 1 << 3,
 128         BCH_READ_LAST_FRAGMENT          = 1 << 4,
 129
 130         /* internal: */
 131         BCH_READ_MUST_BOUNCE            = 1 << 5,
 132         BCH_READ_MUST_CLONE             = 1 << 6,
 133         BCH_READ_IN_RETRY               = 1 << 7,
 134 };
 135
 136 int __bch2_read_extent(struct bch_fs *, struct bch_read_bio *,
 137                        struct bvec_iter, struct bkey_s_c, unsigned,
 138                        struct bch_io_failures *, unsigned);
 139
 140 static inline void bch2_read_extent(struct bch_fs *c,
 141                                     struct bch_read_bio *rbio,
 142                                     struct bkey_s_c k,
 143                                     unsigned offset_into_extent,
 144                                     unsigned flags)
 145 {
 146         __bch2_read_extent(c, rbio, rbio->bio.bi_iter, k,
 147                            offset_into_extent, NULL, flags);
 148 }
 149
 150 void bch2_read(struct bch_fs *, struct bch_read_bio *, u64);
 151
 152 static inline struct bch_read_bio *rbio_init(struct bio *bio,
 153                                              struct bch_io_opts opts)
 154 {
 155         struct bch_read_bio *rbio = to_rbio(bio);
 156
 157         rbio->_state    = 0;
 158         rbio->promote   = NULL;
 159         rbio->opts      = opts;
 160         return rbio;
 161 }
 162
 163 void bch2_fs_io_exit(struct bch_fs *);
 164 int bch2_fs_io_init(struct bch_fs *);
 165
 166 #endif /* _BCACHEFS_IO_H */