140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_BTREE_CACHE_H
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#define _BCACHEFS_BTREE_CACHE_H
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#include "bcachefs.h"
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#include "btree_types.h"
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#include "bkey_methods.h"
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extern const char * const bch2_btree_node_flags[];
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struct btree_iter;
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void bch2_recalc_btree_reserve(struct bch_fs *);
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void bch2_btree_node_hash_remove(struct btree_cache *, struct btree *);
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int __bch2_btree_node_hash_insert(struct btree_cache *, struct btree *);
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int bch2_btree_node_hash_insert(struct btree_cache *, struct btree *,
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unsigned, enum btree_id);
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void bch2_btree_node_update_key_early(struct btree_trans *, enum btree_id, unsigned,
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struct bkey_s_c, struct bkey_i *);
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void bch2_btree_cache_cannibalize_unlock(struct btree_trans *);
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int bch2_btree_cache_cannibalize_lock(struct btree_trans *, struct closure *);
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struct btree *__bch2_btree_node_mem_alloc(struct bch_fs *);
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struct btree *bch2_btree_node_mem_alloc(struct btree_trans *, bool);
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struct btree *bch2_btree_node_get(struct btree_trans *, struct btree_path *,
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const struct bkey_i *, unsigned,
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enum six_lock_type, unsigned long);
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struct btree *bch2_btree_node_get_noiter(struct btree_trans *, const struct bkey_i *,
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enum btree_id, unsigned, bool);
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int bch2_btree_node_prefetch(struct btree_trans *, struct btree_path *,
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const struct bkey_i *, enum btree_id, unsigned);
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void bch2_btree_node_evict(struct btree_trans *, const struct bkey_i *);
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void bch2_fs_btree_cache_exit(struct bch_fs *);
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int bch2_fs_btree_cache_init(struct bch_fs *);
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void bch2_fs_btree_cache_init_early(struct btree_cache *);
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static inline u64 btree_ptr_hash_val(const struct bkey_i *k)
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{
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switch (k->k.type) {
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case KEY_TYPE_btree_ptr:
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return *((u64 *) bkey_i_to_btree_ptr_c(k)->v.start);
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case KEY_TYPE_btree_ptr_v2:
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/*
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* The cast/deref is only necessary to avoid sparse endianness
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* warnings:
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*/
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return *((u64 *) &bkey_i_to_btree_ptr_v2_c(k)->v.seq);
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default:
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return 0;
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}
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}
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static inline struct btree *btree_node_mem_ptr(const struct bkey_i *k)
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{
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return k->k.type == KEY_TYPE_btree_ptr_v2
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? (void *)(unsigned long)bkey_i_to_btree_ptr_v2_c(k)->v.mem_ptr
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: NULL;
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}
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/* is btree node in hash table? */
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static inline bool btree_node_hashed(struct btree *b)
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{
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return b->hash_val != 0;
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}
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#define for_each_cached_btree(_b, _c, _tbl, _iter, _pos) \
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for ((_tbl) = rht_dereference_rcu((_c)->btree_cache.table.tbl, \
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&(_c)->btree_cache.table), \
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_iter = 0; _iter < (_tbl)->size; _iter++) \
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rht_for_each_entry_rcu((_b), (_pos), _tbl, _iter, hash)
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static inline size_t btree_buf_bytes(const struct btree *b)
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{
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return 1UL << b->byte_order;
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}
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static inline size_t btree_buf_max_u64s(const struct btree *b)
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{
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return (btree_buf_bytes(b) - sizeof(struct btree_node)) / sizeof(u64);
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}
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static inline size_t btree_max_u64s(const struct bch_fs *c)
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{
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return (c->opts.btree_node_size - sizeof(struct btree_node)) / sizeof(u64);
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}
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static inline size_t btree_sectors(const struct bch_fs *c)
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{
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return c->opts.btree_node_size >> SECTOR_SHIFT;
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}
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static inline unsigned btree_blocks(const struct bch_fs *c)
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{
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return btree_sectors(c) >> c->block_bits;
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}
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#define BTREE_SPLIT_THRESHOLD(c) (btree_max_u64s(c) * 2 / 3)
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#define BTREE_FOREGROUND_MERGE_THRESHOLD(c) (btree_max_u64s(c) * 1 / 3)
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#define BTREE_FOREGROUND_MERGE_HYSTERESIS(c) \
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(BTREE_FOREGROUND_MERGE_THRESHOLD(c) + \
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(BTREE_FOREGROUND_MERGE_THRESHOLD(c) >> 2))
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static inline unsigned btree_id_nr_alive(struct bch_fs *c)
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{
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return BTREE_ID_NR + c->btree_roots_extra.nr;
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}
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static inline struct btree_root *bch2_btree_id_root(struct bch_fs *c, unsigned id)
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{
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if (likely(id < BTREE_ID_NR)) {
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return &c->btree_roots_known[id];
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} else {
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unsigned idx = id - BTREE_ID_NR;
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EBUG_ON(idx >= c->btree_roots_extra.nr);
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return &c->btree_roots_extra.data[idx];
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}
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}
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static inline struct btree *btree_node_root(struct bch_fs *c, struct btree *b)
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{
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return bch2_btree_id_root(c, b->c.btree_id)->b;
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}
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const char *bch2_btree_id_str(enum btree_id);
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void bch2_btree_pos_to_text(struct printbuf *, struct bch_fs *, const struct btree *);
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void bch2_btree_node_to_text(struct printbuf *, struct bch_fs *, const struct btree *);
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void bch2_btree_cache_to_text(struct printbuf *, const struct btree_cache *);
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#endif /* _BCACHEFS_BTREE_CACHE_H */
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