fs/bcachefs/btree_journal_iter.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BTREE_JOURNAL_ITER_H
   3 #define _BCACHEFS_BTREE_JOURNAL_ITER_H
   4
   5 struct journal_iter {
   6         struct list_head        list;
   7         enum btree_id           btree_id;
   8         unsigned                level;
   9         size_t                  idx;
  10         struct journal_keys     *keys;
  11 };
  12
  13 /*
  14  * Iterate over keys in the btree, with keys from the journal overlaid on top:
  15  */
  16
  17 struct btree_and_journal_iter {
  18         struct btree            *b;
  19         struct btree_node_iter  node_iter;
  20         struct bkey             unpacked;
  21
  22         struct journal_iter     journal;
  23         struct bpos             pos;
  24         bool                    at_end;
  25 };
  26
  27 struct bkey_i *bch2_journal_keys_peek_upto(struct bch_fs *, enum btree_id,
  28                                 unsigned, struct bpos, struct bpos, size_t *);
  29 struct bkey_i *bch2_journal_keys_peek_slot(struct bch_fs *, enum btree_id,
  30                                            unsigned, struct bpos);
  31
  32 int bch2_journal_key_insert_take(struct bch_fs *, enum btree_id,
  33                                  unsigned, struct bkey_i *);
  34 int bch2_journal_key_insert(struct bch_fs *, enum btree_id,
  35                             unsigned, struct bkey_i *);
  36 int bch2_journal_key_delete(struct bch_fs *, enum btree_id,
  37                             unsigned, struct bpos);
  38 void bch2_journal_key_overwritten(struct bch_fs *, enum btree_id,
  39                                   unsigned, struct bpos);
  40
  41 void bch2_btree_and_journal_iter_advance(struct btree_and_journal_iter *);
  42 struct bkey_s_c bch2_btree_and_journal_iter_peek(struct btree_and_journal_iter *);
  43
  44 void bch2_btree_and_journal_iter_exit(struct btree_and_journal_iter *);
  45 void __bch2_btree_and_journal_iter_init_node_iter(struct btree_and_journal_iter *,
  46                                 struct bch_fs *, struct btree *,
  47                                 struct btree_node_iter, struct bpos);
  48 void bch2_btree_and_journal_iter_init_node_iter(struct btree_and_journal_iter *,
  49                                                 struct bch_fs *,
  50                                                 struct btree *);
  51
  52 void bch2_journal_keys_put(struct bch_fs *);
  53
  54 static inline void bch2_journal_keys_put_initial(struct bch_fs *c)
  55 {
  56         if (c->journal_keys.initial_ref_held)
  57                 bch2_journal_keys_put(c);
  58         c->journal_keys.initial_ref_held = false;
  59 }
  60
  61 void bch2_journal_entries_free(struct bch_fs *);
  62
  63 int bch2_journal_keys_sort(struct bch_fs *);
  64
  65 #endif /* _BCACHEFS_BTREE_JOURNAL_ITER_H */