linux/fs/bcachefs/btree_journal_iter.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_BTREE_JOURNAL_ITER_H
#define _BCACHEFS_BTREE_JOURNAL_ITER_H

#include "bkey.h"

struct journal_iter { … };

/*
 * Iterate over keys in the btree, with keys from the journal overlaid on top:
 */

struct btree_and_journal_iter { … };

static inline int __journal_key_cmp(enum btree_id	l_btree_id,
				    unsigned		l_level,
				    struct bpos	l_pos,
				    const struct journal_key *r)
{ … }

static inline int journal_key_cmp(const struct journal_key *l, const struct journal_key *r)
{ … }

struct bkey_i *bch2_journal_keys_peek_upto(struct bch_fs *, enum btree_id,
				unsigned, struct bpos, struct bpos, size_t *);
struct bkey_i *bch2_journal_keys_peek_slot(struct bch_fs *, enum btree_id,
					   unsigned, struct bpos);

int bch2_btree_and_journal_iter_prefetch(struct btree_trans *, struct btree_path *,
					 struct btree_and_journal_iter *);

int bch2_journal_key_insert_take(struct bch_fs *, enum btree_id,
				 unsigned, struct bkey_i *);
int bch2_journal_key_insert(struct bch_fs *, enum btree_id,
			    unsigned, struct bkey_i *);
int bch2_journal_key_delete(struct bch_fs *, enum btree_id,
			    unsigned, struct bpos);
bool bch2_key_deleted_in_journal(struct btree_trans *, enum btree_id, unsigned, struct bpos);
void bch2_journal_key_overwritten(struct bch_fs *, enum btree_id, unsigned, struct bpos);

void bch2_btree_and_journal_iter_advance(struct btree_and_journal_iter *);
struct bkey_s_c bch2_btree_and_journal_iter_peek(struct btree_and_journal_iter *);

void bch2_btree_and_journal_iter_exit(struct btree_and_journal_iter *);
void __bch2_btree_and_journal_iter_init_node_iter(struct btree_trans *,
				struct btree_and_journal_iter *, struct btree *,
				struct btree_node_iter, struct bpos);
void bch2_btree_and_journal_iter_init_node_iter(struct btree_trans *,
				struct btree_and_journal_iter *, struct btree *);

void bch2_journal_keys_put(struct bch_fs *);

static inline void bch2_journal_keys_put_initial(struct bch_fs *c)
{ … }

void bch2_journal_entries_free(struct bch_fs *);

int bch2_journal_keys_sort(struct bch_fs *);

void bch2_shoot_down_journal_keys(struct bch_fs *, enum btree_id,
				  unsigned, unsigned,
				  struct bpos, struct bpos);

void bch2_journal_keys_dump(struct bch_fs *);

#endif /* _BCACHEFS_BTREE_JOURNAL_ITER_H */