1c6fdbd8f2
Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write filesystem with every feature you could possibly want. Website: https://bcachefs.org Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_BKEY_METHODS_H
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#define _BCACHEFS_BKEY_METHODS_H
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#include "bkey.h"
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#define DEF_BTREE_ID(kwd, val, name) BKEY_TYPE_##kwd = val,
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enum bkey_type {
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DEFINE_BCH_BTREE_IDS()
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BKEY_TYPE_BTREE,
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};
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#undef DEF_BTREE_ID
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/* Type of a key in btree @id at level @level: */
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static inline enum bkey_type bkey_type(unsigned level, enum btree_id id)
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{
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return level ? BKEY_TYPE_BTREE : (enum bkey_type) id;
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}
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static inline bool btree_type_has_ptrs(enum bkey_type type)
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{
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switch (type) {
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case BKEY_TYPE_BTREE:
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case BKEY_TYPE_EXTENTS:
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return true;
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default:
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return false;
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}
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}
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struct bch_fs;
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struct btree;
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struct bkey;
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enum merge_result {
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BCH_MERGE_NOMERGE,
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/*
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* The keys were mergeable, but would have overflowed size - so instead
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* l was changed to the maximum size, and both keys were modified:
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*/
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BCH_MERGE_PARTIAL,
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BCH_MERGE_MERGE,
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};
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typedef bool (*key_filter_fn)(struct bch_fs *, struct btree *,
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struct bkey_s);
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typedef enum merge_result (*key_merge_fn)(struct bch_fs *,
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struct btree *,
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struct bkey_i *, struct bkey_i *);
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struct bkey_ops {
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/* Returns reason for being invalid if invalid, else NULL: */
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const char * (*key_invalid)(const struct bch_fs *,
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struct bkey_s_c);
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void (*key_debugcheck)(struct bch_fs *, struct btree *,
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struct bkey_s_c);
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void (*val_to_text)(struct bch_fs *, char *,
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size_t, struct bkey_s_c);
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void (*swab)(const struct bkey_format *, struct bkey_packed *);
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key_filter_fn key_normalize;
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key_merge_fn key_merge;
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bool is_extents;
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};
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const char *bch2_bkey_val_invalid(struct bch_fs *, enum bkey_type,
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struct bkey_s_c);
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const char *__bch2_bkey_invalid(struct bch_fs *, enum bkey_type, struct bkey_s_c);
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const char *bch2_bkey_invalid(struct bch_fs *, enum bkey_type, struct bkey_s_c);
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const char *bch2_bkey_in_btree_node(struct btree *, struct bkey_s_c);
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void bch2_bkey_debugcheck(struct bch_fs *, struct btree *, struct bkey_s_c);
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int bch2_bkey_to_text(char *, size_t, const struct bkey *);
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int bch2_val_to_text(struct bch_fs *, enum bkey_type,
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char *, size_t, struct bkey_s_c);
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int bch2_bkey_val_to_text(struct bch_fs *, enum bkey_type,
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char *, size_t, struct bkey_s_c);
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void bch2_bkey_swab(enum bkey_type, const struct bkey_format *,
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struct bkey_packed *);
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extern const struct bkey_ops bch2_bkey_ops[];
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#endif /* _BCACHEFS_BKEY_METHODS_H */
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