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 *, bool);
  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_DATA_ENCODED          = (1 << 2),
  31         BCH_WRITE_PAGES_STABLE          = (1 << 3),
  32         BCH_WRITE_PAGES_OWNED           = (1 << 4),
  33         BCH_WRITE_ONLY_SPECIFIED_DEVS   = (1 << 5),
  34         BCH_WRITE_WROTE_DATA_INLINE     = (1 << 6),
  35         BCH_WRITE_CHECK_ENOSPC          = (1 << 7),
  36         BCH_WRITE_SYNC                  = (1 << 8),
  37         BCH_WRITE_MOVE                  = (1 << 9),
  38
  39         /* Internal: */
  40         BCH_WRITE_DONE                  = (1 << 10),
  41         BCH_WRITE_IO_ERROR              = (1 << 11),
  42         BCH_WRITE_CONVERT_UNWRITTEN     = (1 << 12),
  43 };
  44
  45 static inline struct workqueue_struct *index_update_wq(struct bch_write_op *op)
  46 {
  47         return op->alloc_reserve == RESERVE_movinggc
  48                 ? op->c->copygc_wq
  49                 : op->c->btree_update_wq;
  50 }
  51
  52 int bch2_sum_sector_overwrites(struct btree_trans *, struct btree_iter *,
  53                                struct bkey_i *, bool *, s64 *, s64 *);
  54 int bch2_extent_update(struct btree_trans *, subvol_inum,
  55                        struct btree_iter *, struct bkey_i *,
  56                        struct disk_reservation *, u64, s64 *, bool);
  57 int bch2_extent_fallocate(struct btree_trans *, subvol_inum, struct btree_iter *,
  58                           unsigned, struct bch_io_opts, s64 *,
  59                           struct write_point_specifier);
  60
  61 int bch2_fpunch_at(struct btree_trans *, struct btree_iter *,
  62                    subvol_inum, u64, s64 *);
  63 int bch2_fpunch(struct bch_fs *c, subvol_inum, u64, u64, s64 *);
  64
  65 static inline void bch2_write_op_init(struct bch_write_op *op, struct bch_fs *c,
  66                                       struct bch_io_opts opts)
  67 {
  68         op->c                   = c;
  69         op->end_io              = NULL;
  70         op->flags               = 0;
  71         op->written             = 0;
  72         op->error               = 0;
  73         op->csum_type           = bch2_data_checksum_type(c, opts);
  74         op->compression_type    = bch2_compression_opt_to_type[opts.compression];
  75         op->nr_replicas         = 0;
  76         op->nr_replicas_required = c->opts.data_replicas_required;
  77         op->alloc_reserve       = RESERVE_none;
  78         op->incompressible      = 0;
  79         op->open_buckets.nr     = 0;
  80         op->devs_have.nr        = 0;
  81         op->target              = 0;
  82         op->opts                = opts;
  83         op->subvol              = 0;
  84         op->pos                 = POS_MAX;
  85         op->version             = ZERO_VERSION;
  86         op->write_point         = (struct write_point_specifier) { 0 };
  87         op->res                 = (struct disk_reservation) { 0 };
  88         op->new_i_size          = U64_MAX;
  89         op->i_sectors_delta     = 0;
  90         op->devs_need_flush     = NULL;
  91 }
  92
  93 void bch2_write(struct closure *);
  94
  95 void bch2_write_point_do_index_updates(struct work_struct *);
  96
  97 static inline struct bch_write_bio *wbio_init(struct bio *bio)
  98 {
  99         struct bch_write_bio *wbio = to_wbio(bio);
 100
 101         memset(wbio, 0, offsetof(struct bch_write_bio, bio));
 102         return wbio;
 103 }
 104
 105 struct bch_devs_mask;
 106 struct cache_promote_op;
 107 struct extent_ptr_decoded;
 108
 109 int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
 110                                 struct bkey_buf *);
 111
 112 static inline int bch2_read_indirect_extent(struct btree_trans *trans,
 113                                             enum btree_id *data_btree,
 114                                             unsigned *offset_into_extent,
 115                                             struct bkey_buf *k)
 116 {
 117         if (k->k->k.type != KEY_TYPE_reflink_p)
 118                 return 0;
 119
 120         *data_btree = BTREE_ID_reflink;
 121         return __bch2_read_indirect_extent(trans, offset_into_extent, k);
 122 }
 123
 124 enum bch_read_flags {
 125         BCH_READ_RETRY_IF_STALE         = 1 << 0,
 126         BCH_READ_MAY_PROMOTE            = 1 << 1,
 127         BCH_READ_USER_MAPPED            = 1 << 2,
 128         BCH_READ_NODECODE               = 1 << 3,
 129         BCH_READ_LAST_FRAGMENT          = 1 << 4,
 130
 131         /* internal: */
 132         BCH_READ_MUST_BOUNCE            = 1 << 5,
 133         BCH_READ_MUST_CLONE             = 1 << 6,
 134         BCH_READ_IN_RETRY               = 1 << 7,
 135 };
 136
 137 int __bch2_read_extent(struct btree_trans *, struct bch_read_bio *,
 138                        struct bvec_iter, struct bpos, enum btree_id,
 139                        struct bkey_s_c, unsigned,
 140                        struct bch_io_failures *, unsigned);
 141
 142 static inline void bch2_read_extent(struct btree_trans *trans,
 143                         struct bch_read_bio *rbio, struct bpos read_pos,
 144                         enum btree_id data_btree, struct bkey_s_c k,
 145                         unsigned offset_into_extent, unsigned flags)
 146 {
 147         __bch2_read_extent(trans, rbio, rbio->bio.bi_iter, read_pos,
 148                            data_btree, k, offset_into_extent, NULL, flags);
 149 }
 150
 151 void __bch2_read(struct bch_fs *, struct bch_read_bio *, struct bvec_iter,
 152                  subvol_inum, struct bch_io_failures *, unsigned flags);
 153
 154 static inline void bch2_read(struct bch_fs *c, struct bch_read_bio *rbio,
 155                              subvol_inum inum)
 156 {
 157         struct bch_io_failures failed = { .nr = 0 };
 158
 159         BUG_ON(rbio->_state);
 160
 161         rbio->c = c;
 162         rbio->start_time = local_clock();
 163         rbio->subvol = inum.subvol;
 164
 165         __bch2_read(c, rbio, rbio->bio.bi_iter, inum, &failed,
 166                     BCH_READ_RETRY_IF_STALE|
 167                     BCH_READ_MAY_PROMOTE|
 168                     BCH_READ_USER_MAPPED);
 169 }
 170
 171 static inline struct bch_read_bio *rbio_init(struct bio *bio,
 172                                              struct bch_io_opts opts)
 173 {
 174         struct bch_read_bio *rbio = to_rbio(bio);
 175
 176         rbio->_state    = 0;
 177         rbio->promote   = NULL;
 178         rbio->opts      = opts;
 179         return rbio;
 180 }
 181
 182 void bch2_fs_io_exit(struct bch_fs *);
 183 int bch2_fs_io_init(struct bch_fs *);
 184
 185 #endif /* _BCACHEFS_IO_H */