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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_BKEY_METHODS_H
#define _BCACHEFS_BKEY_METHODS_H
#include "bkey.h"
struct bch_fs;
struct btree;
struct btree_trans;
struct bkey;
enum btree_node_type;
extern const char * const bch2_bkey_types[];
extern const struct bkey_ops bch2_bkey_null_ops;
/*
* key_invalid: checks validity of @k, returns 0 if good or -EINVAL if bad. If
* invalid, entire key will be deleted.
*
* When invalid, error string is returned via @err. @rw indicates whether key is
* being read or written; more aggressive checks can be enabled when rw == WRITE.
*/
struct bkey_ops {
int (*key_invalid)(struct bch_fs *c, struct bkey_s_c k,
enum bkey_invalid_flags flags, struct printbuf *err);
void (*val_to_text)(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
void (*swab)(struct bkey_s);
bool (*key_normalize)(struct bch_fs *, struct bkey_s);
bool (*key_merge)(struct bch_fs *, struct bkey_s, struct bkey_s_c);
int (*trigger)(struct btree_trans *, enum btree_id, unsigned,
struct bkey_s_c, struct bkey_s, unsigned);
void (*compat)(enum btree_id id, unsigned version,
unsigned big_endian, int write,
struct bkey_s);
/* Size of value type when first created: */
unsigned min_val_size;
};
extern const struct bkey_ops bch2_bkey_ops[];
static inline const struct bkey_ops *bch2_bkey_type_ops(enum bch_bkey_type type)
{
return likely(type < KEY_TYPE_MAX)
? &bch2_bkey_ops[type]
: &bch2_bkey_null_ops;
}
int bch2_bkey_val_invalid(struct bch_fs *, struct bkey_s_c,
enum bkey_invalid_flags, struct printbuf *);
int __bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c, enum btree_node_type,
enum bkey_invalid_flags, struct printbuf *);
int bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c, enum btree_node_type,
enum bkey_invalid_flags, struct printbuf *);
int bch2_bkey_in_btree_node(struct bch_fs *, struct btree *,
struct bkey_s_c, struct printbuf *);
void bch2_bpos_to_text(struct printbuf *, struct bpos);
void bch2_bkey_to_text(struct printbuf *, const struct bkey *);
void bch2_val_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
void bch2_bkey_val_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
void bch2_bkey_swab_val(struct bkey_s);
bool bch2_bkey_normalize(struct bch_fs *, struct bkey_s);
static inline bool bch2_bkey_maybe_mergable(const struct bkey *l, const struct bkey *r)
{
return l->type == r->type &&
!bversion_cmp(l->version, r->version) &&
bpos_eq(l->p, bkey_start_pos(r));
}
bool bch2_bkey_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
enum btree_update_flags {
__BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE = __BTREE_ITER_FLAGS_END,
__BTREE_UPDATE_NOJOURNAL,
__BTREE_UPDATE_KEY_CACHE_RECLAIM,
__BTREE_TRIGGER_NORUN,
__BTREE_TRIGGER_TRANSACTIONAL,
__BTREE_TRIGGER_INSERT,
__BTREE_TRIGGER_OVERWRITE,
__BTREE_TRIGGER_GC,
__BTREE_TRIGGER_BUCKET_INVALIDATE,
};
#define BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE (1U << __BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE)
#define BTREE_UPDATE_NOJOURNAL (1U << __BTREE_UPDATE_NOJOURNAL)
#define BTREE_UPDATE_KEY_CACHE_RECLAIM (1U << __BTREE_UPDATE_KEY_CACHE_RECLAIM)
/* Don't run triggers at all */
#define BTREE_TRIGGER_NORUN (1U << __BTREE_TRIGGER_NORUN)
/*
* If set, we're running transactional triggers as part of a transaction commit:
* triggers may generate new updates
*
* If cleared, and either BTREE_TRIGGER_INSERT|BTREE_TRIGGER_OVERWRITE are set,
* we're running atomic triggers during a transaction commit: we have our
* journal reservation, we're holding btree node write locks, and we know the
* transaction is going to commit (returning an error here is a fatal error,
* causing us to go emergency read-only)
*/
#define BTREE_TRIGGER_TRANSACTIONAL (1U << __BTREE_TRIGGER_TRANSACTIONAL)
/* @new is entering the btree */
#define BTREE_TRIGGER_INSERT (1U << __BTREE_TRIGGER_INSERT)
/* @old is leaving the btree */
#define BTREE_TRIGGER_OVERWRITE (1U << __BTREE_TRIGGER_OVERWRITE)
/* We're in gc/fsck: running triggers to recalculate e.g. disk usage */
#define BTREE_TRIGGER_GC (1U << __BTREE_TRIGGER_GC)
/* signal from bucket invalidate path to alloc trigger */
#define BTREE_TRIGGER_BUCKET_INVALIDATE (1U << __BTREE_TRIGGER_BUCKET_INVALIDATE)
static inline int bch2_key_trigger(struct btree_trans *trans,
enum btree_id btree, unsigned level,
struct bkey_s_c old, struct bkey_s new,
unsigned flags)
{
const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new.k->type);
return ops->trigger
? ops->trigger(trans, btree, level, old, new, flags)
: 0;
}
static inline int bch2_key_trigger_old(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, unsigned flags)
{
struct bkey_i deleted;
bkey_init(&deleted.k);
deleted.k.p = old.k->p;
return bch2_key_trigger(trans, btree_id, level, old, bkey_i_to_s(&deleted),
BTREE_TRIGGER_OVERWRITE|flags);
}
static inline int bch2_key_trigger_new(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s new, unsigned flags)
{
struct bkey_i deleted;
bkey_init(&deleted.k);
deleted.k.p = new.k->p;
return bch2_key_trigger(trans, btree_id, level, bkey_i_to_s_c(&deleted), new,
BTREE_TRIGGER_INSERT|flags);
}
void bch2_bkey_renumber(enum btree_node_type, struct bkey_packed *, int);
void __bch2_bkey_compat(unsigned, enum btree_id, unsigned, unsigned,
int, struct bkey_format *, struct bkey_packed *);
static inline void bch2_bkey_compat(unsigned level, enum btree_id btree_id,
unsigned version, unsigned big_endian,
int write,
struct bkey_format *f,
struct bkey_packed *k)
{
if (version < bcachefs_metadata_version_current ||
big_endian != CPU_BIG_ENDIAN)
__bch2_bkey_compat(level, btree_id, version,
big_endian, write, f, k);
}
#endif /* _BCACHEFS_BKEY_METHODS_H */
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