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 #ifndef CONFIG_BCACHEFS_NO_LATENCY_ACCT
  19 void bch2_latency_acct(struct bch_dev *, u64, int);
  20 #else
  21 static inline void bch2_latency_acct(struct bch_dev *ca, u64 submit_time, int rw) {}
  22 #endif
  23
  24 void bch2_submit_wbio_replicas(struct bch_write_bio *, struct bch_fs *,
  25                                enum bch_data_type, const struct bkey_i *, bool);
  26
  27 #define BLK_STS_REMOVED         ((__force blk_status_t)128)
  28
  29 const char *bch2_blk_status_to_str(blk_status_t);
  30
  31 #define BCH_WRITE_FLAGS()               \
  32         x(ALLOC_NOWAIT)                 \
  33         x(CACHED)                       \
  34         x(DATA_ENCODED)                 \
  35         x(PAGES_STABLE)                 \
  36         x(PAGES_OWNED)                  \
  37         x(ONLY_SPECIFIED_DEVS)          \
  38         x(WROTE_DATA_INLINE)            \
  39         x(FROM_INTERNAL)                \
  40         x(CHECK_ENOSPC)                 \
  41         x(SYNC)                         \
  42         x(MOVE)                         \
  43         x(IN_WORKER)                    \
  44         x(DONE)                         \
  45         x(IO_ERROR)                     \
  46         x(CONVERT_UNWRITTEN)
  47
  48 enum __bch_write_flags {
  49 #define x(f)    __BCH_WRITE_##f,
  50         BCH_WRITE_FLAGS()
  51 #undef x
  52 };
  53
  54 enum bch_write_flags {
  55 #define x(f)    BCH_WRITE_##f = 1U << __BCH_WRITE_##f,
  56         BCH_WRITE_FLAGS()
  57 #undef x
  58 };
  59
  60 static inline struct workqueue_struct *index_update_wq(struct bch_write_op *op)
  61 {
  62         return op->alloc_reserve == RESERVE_movinggc
  63                 ? op->c->copygc_wq
  64                 : op->c->btree_update_wq;
  65 }
  66
  67 int bch2_sum_sector_overwrites(struct btree_trans *, struct btree_iter *,
  68                                struct bkey_i *, bool *, s64 *, s64 *);
  69 int bch2_extent_update(struct btree_trans *, subvol_inum,
  70                        struct btree_iter *, struct bkey_i *,
  71                        struct disk_reservation *, u64, s64 *, bool);
  72 int bch2_extent_fallocate(struct btree_trans *, subvol_inum, struct btree_iter *,
  73                           unsigned, struct bch_io_opts, s64 *,
  74                           struct write_point_specifier);
  75
  76 int bch2_fpunch_at(struct btree_trans *, struct btree_iter *,
  77                    subvol_inum, u64, s64 *);
  78 int bch2_fpunch(struct bch_fs *c, subvol_inum, u64, u64, s64 *);
  79
  80 static inline void bch2_write_op_init(struct bch_write_op *op, struct bch_fs *c,
  81                                       struct bch_io_opts opts)
  82 {
  83         op->c                   = c;
  84         op->end_io              = NULL;
  85         op->flags               = 0;
  86         op->written             = 0;
  87         op->error               = 0;
  88         op->csum_type           = bch2_data_checksum_type(c, opts);
  89         op->compression_type    = bch2_compression_opt_to_type[opts.compression];
  90         op->nr_replicas         = 0;
  91         op->nr_replicas_required = c->opts.data_replicas_required;
  92         op->alloc_reserve       = RESERVE_none;
  93         op->incompressible      = 0;
  94         op->open_buckets.nr     = 0;
  95         op->devs_have.nr        = 0;
  96         op->target              = 0;
  97         op->opts                = opts;
  98         op->subvol              = 0;
  99         op->pos                 = POS_MAX;
 100         op->version             = ZERO_VERSION;
 101         op->write_point         = (struct write_point_specifier) { 0 };
 102         op->res                 = (struct disk_reservation) { 0 };
 103         op->new_i_size          = U64_MAX;
 104         op->i_sectors_delta     = 0;
 105         op->devs_need_flush     = NULL;
 106 }
 107
 108 void bch2_write(struct closure *);
 109
 110 void bch2_write_point_do_index_updates(struct work_struct *);
 111
 112 static inline struct bch_write_bio *wbio_init(struct bio *bio)
 113 {
 114         struct bch_write_bio *wbio = to_wbio(bio);
 115
 116         memset(wbio, 0, offsetof(struct bch_write_bio, bio));
 117         return wbio;
 118 }
 119
 120 void bch2_write_op_to_text(struct printbuf *, struct bch_write_op *);
 121
 122 struct bch_devs_mask;
 123 struct cache_promote_op;
 124 struct extent_ptr_decoded;
 125
 126 int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
 127                                 struct bkey_buf *);
 128
 129 static inline int bch2_read_indirect_extent(struct btree_trans *trans,
 130                                             enum btree_id *data_btree,
 131                                             unsigned *offset_into_extent,
 132                                             struct bkey_buf *k)
 133 {
 134         if (k->k->k.type != KEY_TYPE_reflink_p)
 135                 return 0;
 136
 137         *data_btree = BTREE_ID_reflink;
 138         return __bch2_read_indirect_extent(trans, offset_into_extent, k);
 139 }
 140
 141 enum bch_read_flags {
 142         BCH_READ_RETRY_IF_STALE         = 1 << 0,
 143         BCH_READ_MAY_PROMOTE            = 1 << 1,
 144         BCH_READ_USER_MAPPED            = 1 << 2,
 145         BCH_READ_NODECODE               = 1 << 3,
 146         BCH_READ_LAST_FRAGMENT          = 1 << 4,
 147
 148         /* internal: */
 149         BCH_READ_MUST_BOUNCE            = 1 << 5,
 150         BCH_READ_MUST_CLONE             = 1 << 6,
 151         BCH_READ_IN_RETRY               = 1 << 7,
 152 };
 153
 154 int __bch2_read_extent(struct btree_trans *, struct bch_read_bio *,
 155                        struct bvec_iter, struct bpos, enum btree_id,
 156                        struct bkey_s_c, unsigned,
 157                        struct bch_io_failures *, unsigned);
 158
 159 static inline void bch2_read_extent(struct btree_trans *trans,
 160                         struct bch_read_bio *rbio, struct bpos read_pos,
 161                         enum btree_id data_btree, struct bkey_s_c k,
 162                         unsigned offset_into_extent, unsigned flags)
 163 {
 164         __bch2_read_extent(trans, rbio, rbio->bio.bi_iter, read_pos,
 165                            data_btree, k, offset_into_extent, NULL, flags);
 166 }
 167
 168 void __bch2_read(struct bch_fs *, struct bch_read_bio *, struct bvec_iter,
 169                  subvol_inum, struct bch_io_failures *, unsigned flags);
 170
 171 static inline void bch2_read(struct bch_fs *c, struct bch_read_bio *rbio,
 172                              subvol_inum inum)
 173 {
 174         struct bch_io_failures failed = { .nr = 0 };
 175
 176         BUG_ON(rbio->_state);
 177
 178         rbio->c = c;
 179         rbio->start_time = local_clock();
 180         rbio->subvol = inum.subvol;
 181
 182         __bch2_read(c, rbio, rbio->bio.bi_iter, inum, &failed,
 183                     BCH_READ_RETRY_IF_STALE|
 184                     BCH_READ_MAY_PROMOTE|
 185                     BCH_READ_USER_MAPPED);
 186 }
 187
 188 static inline struct bch_read_bio *rbio_init(struct bio *bio,
 189                                              struct bch_io_opts opts)
 190 {
 191         struct bch_read_bio *rbio = to_rbio(bio);
 192
 193         rbio->_state    = 0;
 194         rbio->promote   = NULL;
 195         rbio->opts      = opts;
 196         return rbio;
 197 }
 198
 199 void bch2_fs_io_exit(struct bch_fs *);
 200 int bch2_fs_io_init(struct bch_fs *);
 201
 202 #endif /* _BCACHEFS_IO_H */