struct bch_fs;
struct btree;
+struct btree_trans;
struct bkey;
enum btree_node_type;
extern const char * const bch2_bkey_types[];
-
-enum merge_result {
- BCH_MERGE_NOMERGE,
-
- /*
- * The keys were mergeable, but would have overflowed size - so instead
- * l was changed to the maximum size, and both keys were modified:
- */
- BCH_MERGE_PARTIAL,
- BCH_MERGE_MERGE,
-};
-
+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 {
- /* Returns reason for being invalid if invalid, else NULL: */
- const char * (*key_invalid)(const struct bch_fs *,
- struct bkey_s_c);
- void (*key_debugcheck)(struct bch_fs *, struct bkey_s_c);
+ 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);
- enum merge_result (*key_merge)(struct bch_fs *,
- struct bkey_s, 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;
};
-const char *bch2_bkey_val_invalid(struct bch_fs *, struct bkey_s_c);
-const char *__bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c,
- enum btree_node_type);
-const char *bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c,
- enum btree_node_type);
-const char *bch2_bkey_in_btree_node(struct btree *, struct bkey_s_c);
+extern const struct bkey_ops bch2_bkey_ops[];
-void bch2_bkey_debugcheck(struct bch_fs *, struct btree *, struct bkey_s_c);
+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 *);
bool bch2_bkey_normalize(struct bch_fs *, struct bkey_s);
-enum merge_result bch2_bkey_merge(struct bch_fs *,
- struct bkey_s, 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_ATOMIC,
+ __BTREE_TRIGGER_GC,
+ __BTREE_TRIGGER_INSERT,
+ __BTREE_TRIGGER_OVERWRITE,
+ __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)
+#define BTREE_TRIGGER_ATOMIC (1U << __BTREE_TRIGGER_ATOMIC)
+
+/* We're in gc/fsck: running triggers to recalculate e.g. disk usage */
+#define BTREE_TRIGGER_GC (1U << __BTREE_TRIGGER_GC)
+
+/* @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)
+
+/* 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);
projects / bcachefs-tools-debian / blobdiff