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

   1 #ifndef _BCACHEFS_BTREE_IO_H
   2 #define _BCACHEFS_BTREE_IO_H
   3
   4 #include "extents.h"
   5 #include "io_types.h"
   6
   7 struct bch_fs;
   8 struct btree_write;
   9 struct btree;
  10 struct btree_iter;
  11
  12 struct btree_read_bio {
  13         struct bch_fs           *c;
  14         unsigned                submit_time_us;
  15         u64                     start_time;
  16         struct extent_pick_ptr  pick;
  17         struct work_struct      work;
  18         struct bio              bio;
  19 };
  20
  21 struct btree_write_bio {
  22         struct closure          *cl;
  23         void                    *data;
  24         struct work_struct      work;
  25         struct bch_write_bio    wbio;
  26 };
  27
  28 static inline void btree_node_io_unlock(struct btree *b)
  29 {
  30         EBUG_ON(!btree_node_write_in_flight(b));
  31         clear_btree_node_write_in_flight(b);
  32         wake_up_bit(&b->flags, BTREE_NODE_write_in_flight);
  33 }
  34
  35 static inline void btree_node_io_lock(struct btree *b)
  36 {
  37         wait_on_bit_lock_io(&b->flags, BTREE_NODE_write_in_flight,
  38                             TASK_UNINTERRUPTIBLE);
  39 }
  40
  41 static inline void btree_node_wait_on_io(struct btree *b)
  42 {
  43         wait_on_bit_io(&b->flags, BTREE_NODE_write_in_flight,
  44                        TASK_UNINTERRUPTIBLE);
  45 }
  46
  47 static inline bool btree_node_may_write(struct btree *b)
  48 {
  49         return list_empty_careful(&b->write_blocked) &&
  50                 !b->will_make_reachable;
  51 }
  52
  53 enum compact_mode {
  54         COMPACT_LAZY,
  55         COMPACT_WRITTEN,
  56         COMPACT_WRITTEN_NO_WRITE_LOCK,
  57 };
  58
  59 bool __bch2_compact_whiteouts(struct bch_fs *, struct btree *, enum compact_mode);
  60
  61 static inline bool bch2_maybe_compact_whiteouts(struct bch_fs *c, struct btree *b)
  62 {
  63         struct bset_tree *t;
  64
  65         for_each_bset(b, t) {
  66                 unsigned live_u64s = b->nr.bset_u64s[t - b->set];
  67                 unsigned bset_u64s = le16_to_cpu(bset(b, t)->u64s);
  68
  69                 if (live_u64s * 4 < bset_u64s * 3)
  70                         goto compact;
  71         }
  72
  73         return false;
  74 compact:
  75         return __bch2_compact_whiteouts(c, b, COMPACT_LAZY);
  76 }
  77
  78 void bch2_btree_sort_into(struct bch_fs *, struct btree *, struct btree *);
  79
  80 void bch2_btree_build_aux_trees(struct btree *);
  81 void bch2_btree_init_next(struct bch_fs *, struct btree *,
  82                          struct btree_iter *);
  83
  84 int bch2_btree_node_read_done(struct bch_fs *, struct btree *, bool);
  85 void bch2_btree_node_read(struct bch_fs *, struct btree *, bool);
  86 int bch2_btree_root_read(struct bch_fs *, enum btree_id,
  87                          const struct bkey_i *, unsigned);
  88
  89 void bch2_btree_complete_write(struct bch_fs *, struct btree *,
  90                               struct btree_write *);
  91 void bch2_btree_write_error_work(struct work_struct *);
  92
  93 void __bch2_btree_node_write(struct bch_fs *, struct btree *,
  94                             struct closure *, enum six_lock_type);
  95 bool bch2_btree_post_write_cleanup(struct bch_fs *, struct btree *);
  96
  97 void bch2_btree_node_write(struct bch_fs *, struct btree *,
  98                           struct closure *, enum six_lock_type);
  99
 100 #define bch2_btree_node_write_dirty(_c, _b, _cl, cond)                  \
 101 do {                                                                    \
 102         while ((_b)->written && btree_node_dirty(_b) && (cond)) {       \
 103                 set_btree_node_need_write(_b);                          \
 104                                                                         \
 105                 if (!btree_node_may_write(_b))                          \
 106                         break;                                          \
 107                                                                         \
 108                 if (!btree_node_write_in_flight(_b)) {                  \
 109                         bch2_btree_node_write(_c, _b, _cl, SIX_LOCK_read);\
 110                         break;                                          \
 111                 }                                                       \
 112                                                                         \
 113                 six_unlock_read(&(_b)->lock);                           \
 114                 btree_node_wait_on_io(_b);                              \
 115                 six_lock_read(&(_b)->lock);                             \
 116         }                                                               \
 117 } while (0)
 118
 119 void bch2_btree_verify_flushed(struct bch_fs *);
 120
 121 #endif /* _BCACHEFS_BTREE_IO_H */