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 "bkey_buf.h"
   7 #include "io_types.h"
   8
   9 #define to_wbio(_bio)                   \
  10         container_of((_bio), struct bch_write_bio, bio)
  11
  12 #define to_rbio(_bio)                   \
  13         container_of((_bio), struct bch_read_bio, bio)
  14
  15 void bch2_bio_free_pages_pool(struct bch_fs *, struct bio *);
  16 void bch2_bio_alloc_pages_pool(struct bch_fs *, struct bio *, size_t);
  17
  18 void bch2_latency_acct(struct bch_dev *, u64, int);
  19
  20 void bch2_submit_wbio_replicas(struct bch_write_bio *, struct bch_fs *,
  21                                enum bch_data_type, const struct bkey_i *);
  22
  23 #define BLK_STS_REMOVED         ((__force blk_status_t)128)
  24
  25 const char *bch2_blk_status_to_str(blk_status_t);
  26
  27 enum bch_write_flags {
  28         BCH_WRITE_ALLOC_NOWAIT          = (1 << 0),
  29         BCH_WRITE_CACHED                = (1 << 1),
  30         BCH_WRITE_FLUSH                 = (1 << 2),
  31         BCH_WRITE_DATA_ENCODED          = (1 << 3),
  32         BCH_WRITE_PAGES_STABLE          = (1 << 4),
  33         BCH_WRITE_PAGES_OWNED           = (1 << 5),
  34         BCH_WRITE_ONLY_SPECIFIED_DEVS   = (1 << 6),
  35         BCH_WRITE_WROTE_DATA_INLINE     = (1 << 7),
  36         BCH_WRITE_FROM_INTERNAL         = (1 << 8),
  37         BCH_WRITE_CHECK_ENOSPC          = (1 << 9),
  38
  39         /* Internal: */
  40         BCH_WRITE_JOURNAL_SEQ_PTR       = (1 << 10),
  41         BCH_WRITE_SKIP_CLOSURE_PUT      = (1 << 11),
  42         BCH_WRITE_DONE                  = (1 << 12),
  43 };
  44
  45 static inline u64 *op_journal_seq(struct bch_write_op *op)
  46 {
  47         return (op->flags & BCH_WRITE_JOURNAL_SEQ_PTR)
  48                 ? op->journal_seq_p : &op->journal_seq;
  49 }
  50
  51 static inline struct workqueue_struct *index_update_wq(struct bch_write_op *op)
  52 {
  53         return op->alloc_reserve == RESERVE_MOVINGGC
  54                 ? op->c->copygc_wq
  55                 : op->c->btree_update_wq;
  56 }
  57
  58 int bch2_sum_sector_overwrites(struct btree_trans *, struct btree_iter *,
  59                                struct bkey_i *, bool *, s64 *, s64 *);
  60 int bch2_extent_update(struct btree_trans *, subvol_inum,
  61                        struct btree_iter *, struct bkey_i *,
  62                        struct disk_reservation *, u64 *, u64, s64 *, bool);
  63
  64 int bch2_fpunch_at(struct btree_trans *, struct btree_iter *,
  65                    subvol_inum, u64, s64 *);
  66 int bch2_fpunch(struct bch_fs *c, subvol_inum, u64, u64, s64 *);
  67
  68 int bch2_write_index_default(struct bch_write_op *);
  69
  70 static inline void bch2_write_op_init(struct bch_write_op *op, struct bch_fs *c,
  71                                       struct bch_io_opts opts)
  72 {
  73         op->c                   = c;
  74         op->end_io              = NULL;
  75         op->flags               = 0;
  76         op->written             = 0;
  77         op->error               = 0;
  78         op->csum_type           = bch2_data_checksum_type(c, opts.data_checksum);
  79         op->compression_type    = bch2_compression_opt_to_type[opts.compression];
  80         op->nr_replicas         = 0;
  81         op->nr_replicas_required = c->opts.data_replicas_required;
  82         op->alloc_reserve       = RESERVE_NONE;
  83         op->incompressible      = 0;
  84         op->open_buckets.nr     = 0;
  85         op->devs_have.nr        = 0;
  86         op->target              = 0;
  87         op->opts                = opts;
  88         op->subvol              = 0;
  89         op->pos                 = POS_MAX;
  90         op->version             = ZERO_VERSION;
  91         op->write_point         = (struct write_point_specifier) { 0 };
  92         op->res                 = (struct disk_reservation) { 0 };
  93         op->journal_seq         = 0;
  94         op->new_i_size          = U64_MAX;
  95         op->i_sectors_delta     = 0;
  96         op->index_update_fn     = bch2_write_index_default;
  97 }
  98
  99 void bch2_write(struct closure *);
 100
 101 static inline struct bch_write_bio *wbio_init(struct bio *bio)
 102 {
 103         struct bch_write_bio *wbio = to_wbio(bio);
 104
 105         memset(wbio, 0, offsetof(struct bch_write_bio, bio));
 106         return wbio;
 107 }
 108
 109 struct bch_devs_mask;
 110 struct cache_promote_op;
 111 struct extent_ptr_decoded;
 112
 113 int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
 114                                 struct bkey_buf *);
 115
 116 static inline int bch2_read_indirect_extent(struct btree_trans *trans,
 117                                             enum btree_id *data_btree,
 118                                             unsigned *offset_into_extent,
 119                                             struct bkey_buf *k)
 120 {
 121         if (k->k->k.type != KEY_TYPE_reflink_p)
 122                 return 0;
 123
 124         *data_btree = BTREE_ID_reflink;
 125         return __bch2_read_indirect_extent(trans, offset_into_extent, k);
 126 }
 127
 128 enum bch_read_flags {
 129         BCH_READ_RETRY_IF_STALE         = 1 << 0,
 130         BCH_READ_MAY_PROMOTE            = 1 << 1,
 131         BCH_READ_USER_MAPPED            = 1 << 2,
 132         BCH_READ_NODECODE               = 1 << 3,
 133         BCH_READ_LAST_FRAGMENT          = 1 << 4,
 134
 135         /* internal: */
 136         BCH_READ_MUST_BOUNCE            = 1 << 5,
 137         BCH_READ_MUST_CLONE             = 1 << 6,
 138         BCH_READ_IN_RETRY               = 1 << 7,
 139 };
 140
 141 int __bch2_read_extent(struct btree_trans *, struct bch_read_bio *,
 142                        struct bvec_iter, struct bpos, enum btree_id,
 143                        struct bkey_s_c, unsigned,
 144                        struct bch_io_failures *, unsigned);
 145
 146 static inline void bch2_read_extent(struct btree_trans *trans,
 147                         struct bch_read_bio *rbio, struct bpos read_pos,
 148                         enum btree_id data_btree, struct bkey_s_c k,
 149                         unsigned offset_into_extent, unsigned flags)
 150 {
 151         __bch2_read_extent(trans, rbio, rbio->bio.bi_iter, read_pos,
 152                            data_btree, k, offset_into_extent, NULL, flags);
 153 }
 154
 155 void __bch2_read(struct bch_fs *, struct bch_read_bio *, struct bvec_iter,
 156                  subvol_inum, struct bch_io_failures *, unsigned flags);
 157
 158 static inline void bch2_read(struct bch_fs *c, struct bch_read_bio *rbio,
 159                              subvol_inum inum)
 160 {
 161         struct bch_io_failures failed = { .nr = 0 };
 162
 163         BUG_ON(rbio->_state);
 164
 165         rbio->c = c;
 166         rbio->start_time = local_clock();
 167         rbio->subvol = inum.subvol;
 168
 169         __bch2_read(c, rbio, rbio->bio.bi_iter, inum, &failed,
 170                     BCH_READ_RETRY_IF_STALE|
 171                     BCH_READ_MAY_PROMOTE|
 172                     BCH_READ_USER_MAPPED);
 173 }
 174
 175 static inline struct bch_read_bio *rbio_init(struct bio *bio,
 176                                              struct bch_io_opts opts)
 177 {
 178         struct bch_read_bio *rbio = to_rbio(bio);
 179
 180         rbio->_state    = 0;
 181         rbio->promote   = NULL;
 182         rbio->opts      = opts;
 183         return rbio;
 184 }
 185
 186 void bch2_fs_io_exit(struct bch_fs *);
 187 int bch2_fs_io_init(struct bch_fs *);
 188
 189 #endif /* _BCACHEFS_IO_H */