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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_MOVE_H
   3 #define _BCACHEFS_MOVE_H
   4
   5 #include "btree_iter.h"
   6 #include "buckets.h"
   7 #include "data_update.h"
   8 #include "move_types.h"
   9
  10 struct bch_read_bio;
  11
  12 struct moving_context {
  13         struct bch_fs           *c;
  14         struct bch_ratelimit    *rate;
  15         struct bch_move_stats   *stats;
  16         struct write_point_specifier wp;
  17         bool                    wait_on_copygc;
  18         bool                    write_error;
  19
  20         /* For waiting on outstanding reads and writes: */
  21         struct closure          cl;
  22         struct list_head        reads;
  23
  24         /* in flight sectors: */
  25         atomic_t                read_sectors;
  26         atomic_t                write_sectors;
  27         atomic_t                read_ios;
  28         atomic_t                write_ios;
  29
  30         wait_queue_head_t       wait;
  31 };
  32
  33 #define move_ctxt_wait_event(_ctxt, _trans, _cond)                      \
  34 do {                                                                    \
  35         bool cond_finished = false;                                     \
  36         bch2_moving_ctxt_do_pending_writes(_ctxt, _trans);              \
  37                                                                         \
  38         if (_cond)                                                      \
  39                 break;                                                  \
  40         __wait_event((_ctxt)->wait,                                     \
  41                      bch2_moving_ctxt_next_pending_write(_ctxt) ||      \
  42                      (cond_finished = (_cond)));                        \
  43         if (cond_finished)                                              \
  44                 break;                                                  \
  45 } while (1)
  46
  47 typedef bool (*move_pred_fn)(struct bch_fs *, void *, struct bkey_s_c,
  48                              struct bch_io_opts *, struct data_update_opts *);
  49
  50 void bch2_moving_ctxt_exit(struct moving_context *);
  51 void bch2_moving_ctxt_init(struct moving_context *, struct bch_fs *,
  52                            struct bch_ratelimit *, struct bch_move_stats *,
  53                            struct write_point_specifier, bool);
  54 struct moving_io *bch2_moving_ctxt_next_pending_write(struct moving_context *);
  55 void bch2_moving_ctxt_do_pending_writes(struct moving_context *,
  56                                         struct btree_trans *);
  57
  58 int bch2_scan_old_btree_nodes(struct bch_fs *, struct bch_move_stats *);
  59
  60 int bch2_move_data(struct bch_fs *,
  61                    enum btree_id, struct bpos,
  62                    enum btree_id, struct bpos,
  63                    struct bch_ratelimit *,
  64                    struct bch_move_stats *,
  65                    struct write_point_specifier,
  66                    bool,
  67                    move_pred_fn, void *);
  68
  69 int __bch2_evacuate_bucket(struct btree_trans *,
  70                            struct moving_context *,
  71                            struct bpos, int,
  72                            struct data_update_opts);
  73 int bch2_evacuate_bucket(struct bch_fs *, struct bpos, int,
  74                          struct data_update_opts,
  75                          struct bch_ratelimit *,
  76                          struct bch_move_stats *,
  77                          struct write_point_specifier,
  78                          bool);
  79 int bch2_data_job(struct bch_fs *,
  80                   struct bch_move_stats *,
  81                   struct bch_ioctl_data);
  82
  83 void bch2_move_stats_init(struct bch_move_stats *stats, char *name);
  84
  85
  86 #endif /* _BCACHEFS_MOVE_H */