X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Fbtree_update.h;h=fa19f3212b05a355cd62e52f02b1e79134c63fc5;hb=e3e7f67b3ed89f5b3158142c29e66bb98f868ce2;hp=4adb6f646655b2c95b00104e741f18cdaacb63b2;hpb=7f102ee83d83fd918783ca542fac1574f9b2c623;p=bcachefs-tools-debian

diff --git a/libbcachefs/btree_update.h b/libbcachefs/btree_update.h
index 4adb6f6..fa19f32 100644
--- a/libbcachefs/btree_update.h
+++ b/libbcachefs/btree_update.h
@@ -21,73 +21,88 @@ void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
 void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
 				struct bkey_i *, u64);
 
-enum btree_insert_flags {
-	/* First two bits for journal watermark: */
-	__BTREE_INSERT_NOFAIL = 2,
-	__BTREE_INSERT_NOCHECK_RW,
-	__BTREE_INSERT_LAZY_RW,
-	__BTREE_INSERT_USE_RESERVE,
-	__BTREE_INSERT_JOURNAL_REPLAY,
-	__BTREE_INSERT_JOURNAL_RECLAIM,
-	__BTREE_INSERT_NOWAIT,
-	__BTREE_INSERT_GC_LOCK_HELD,
-	__BCH_HASH_SET_MUST_CREATE,
-	__BCH_HASH_SET_MUST_REPLACE,
+#define BCH_TRANS_COMMIT_FLAGS()							\
+	x(no_enospc,	"don't check for enospc")					\
+	x(no_check_rw,	"don't attempt to take a ref on c->writes")			\
+	x(lazy_rw,	"go read-write if we haven't yet - only for use in recovery")	\
+	x(no_journal_res, "don't take a journal reservation, instead "			\
+			"pin journal entry referred to by trans->journal_res.seq")	\
+	x(journal_reclaim, "operation required for journal reclaim; may return error"	\
+			"instead of deadlocking if BCH_WATERMARK_reclaim not specified")\
+
+enum __bch_trans_commit_flags {
+	/* First bits for bch_watermark: */
+	__BCH_TRANS_COMMIT_FLAGS_START = BCH_WATERMARK_BITS,
+#define x(n, ...)	__BCH_TRANS_COMMIT_##n,
+	BCH_TRANS_COMMIT_FLAGS()
+#undef x
 };
 
-/* Don't check for -ENOSPC: */
-#define BTREE_INSERT_NOFAIL		(1 << __BTREE_INSERT_NOFAIL)
-
-#define BTREE_INSERT_NOCHECK_RW		(1 << __BTREE_INSERT_NOCHECK_RW)
-#define BTREE_INSERT_LAZY_RW		(1 << __BTREE_INSERT_LAZY_RW)
-
-/* for copygc, or when merging btree nodes */
-#define BTREE_INSERT_USE_RESERVE	(1 << __BTREE_INSERT_USE_RESERVE)
-
-/* Insert is for journal replay - don't get journal reservations: */
-#define BTREE_INSERT_JOURNAL_REPLAY	(1 << __BTREE_INSERT_JOURNAL_REPLAY)
-
-/* Insert is being called from journal reclaim path: */
-#define BTREE_INSERT_JOURNAL_RECLAIM (1 << __BTREE_INSERT_JOURNAL_RECLAIM)
-
-/* Don't block on allocation failure (for new btree nodes: */
-#define BTREE_INSERT_NOWAIT		(1 << __BTREE_INSERT_NOWAIT)
-#define BTREE_INSERT_GC_LOCK_HELD	(1 << __BTREE_INSERT_GC_LOCK_HELD)
-
-#define BCH_HASH_SET_MUST_CREATE	(1 << __BCH_HASH_SET_MUST_CREATE)
-#define BCH_HASH_SET_MUST_REPLACE	(1 << __BCH_HASH_SET_MUST_REPLACE)
+enum bch_trans_commit_flags {
+#define x(n, ...)	BCH_TRANS_COMMIT_##n = BIT(__BCH_TRANS_COMMIT_##n),
+	BCH_TRANS_COMMIT_FLAGS()
+#undef x
+};
 
 int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
 				unsigned, unsigned);
 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
-int bch2_btree_delete_at_buffered(struct btree_trans *, enum btree_id, struct bpos);
+int bch2_btree_delete(struct btree_trans *, enum btree_id, struct bpos, unsigned);
 
 int bch2_btree_insert_nonextent(struct btree_trans *, enum btree_id,
 				struct bkey_i *, enum btree_update_flags);
 
-int __bch2_btree_insert(struct btree_trans *, enum btree_id, struct bkey_i *,
+int bch2_btree_insert_trans(struct btree_trans *, enum btree_id, struct bkey_i *,
 			enum btree_update_flags);
 int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *,
-		     struct disk_reservation *, u64 *, int flags);
+		     struct disk_reservation *, int flags);
 
 int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
 				  struct bpos, struct bpos, unsigned, u64 *);
 int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
 			    struct bpos, struct bpos, unsigned, u64 *);
 
-int bch2_btree_node_rewrite(struct btree_trans *, struct btree_iter *,
-			    struct btree *, unsigned);
-void bch2_btree_node_rewrite_async(struct bch_fs *, struct btree *);
-int bch2_btree_node_update_key(struct btree_trans *, struct btree_iter *,
-			       struct btree *, struct bkey_i *, bool);
-int bch2_btree_node_update_key_get_iter(struct btree_trans *,
-				struct btree *, struct bkey_i *, bool);
+int bch2_btree_bit_mod(struct btree_trans *, enum btree_id, struct bpos, bool);
+
+static inline int bch2_btree_delete_at_buffered(struct btree_trans *trans,
+						enum btree_id btree, struct bpos pos)
+{
+	return bch2_btree_bit_mod(trans, btree, pos, false);
+}
 
-int bch2_trans_update_extent(struct btree_trans *, struct btree_iter *,
-			     struct bkey_i *, enum btree_update_flags);
+int __bch2_insert_snapshot_whiteouts(struct btree_trans *, enum btree_id,
+				     struct bpos, struct bpos);
+
+/*
+ * For use when splitting extents in existing snapshots:
+ *
+ * If @old_pos is an interior snapshot node, iterate over descendent snapshot
+ * nodes: for every descendent snapshot in whiche @old_pos is overwritten and
+ * not visible, emit a whiteout at @new_pos.
+ */
+static inline int bch2_insert_snapshot_whiteouts(struct btree_trans *trans,
+						 enum btree_id btree,
+						 struct bpos old_pos,
+						 struct bpos new_pos)
+{
+	if (!btree_type_has_snapshots(btree) ||
+	    bkey_eq(old_pos, new_pos))
+		return 0;
+
+	return __bch2_insert_snapshot_whiteouts(trans, btree, old_pos, new_pos);
+}
+
+int bch2_trans_update_extent_overwrite(struct btree_trans *, struct btree_iter *,
+				       enum btree_update_flags,
+				       struct bkey_s_c, struct bkey_s_c);
+
+int bch2_bkey_get_empty_slot(struct btree_trans *, struct btree_iter *,
+			     enum btree_id, struct bpos);
 
 int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
 				   struct bkey_i *, enum btree_update_flags);
+int __must_check bch2_trans_update_seq(struct btree_trans *, u64, struct btree_iter *,
+				       struct bkey_i *, enum btree_update_flags);
 int __must_check bch2_trans_update_buffered(struct btree_trans *,
 					    enum btree_id, struct bkey_i *);
 
@@ -95,8 +110,8 @@ void bch2_trans_commit_hook(struct btree_trans *,
 			    struct btree_trans_commit_hook *);
 int __bch2_trans_commit(struct btree_trans *, unsigned);
 
-int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
-int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
+__printf(2, 3) int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
+__printf(2, 3) int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
 
 /**
  * bch2_trans_commit - insert keys at given iterator positions
@@ -126,30 +141,17 @@ static inline int bch2_trans_commit(struct btree_trans *trans,
 	nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
 					(_journal_seq), (_flags)))
 
-#define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do)		\
-({									\
-	struct btree_trans trans;					\
-	int _ret;							\
-									\
-	bch2_trans_init(&trans, (_c), 0, 0);				\
-	_ret = commit_do(&trans, _disk_res, _journal_seq, _flags, _do);	\
-	bch2_trans_exit(&trans);					\
-									\
-	_ret;								\
-})
-
 #define bch2_trans_run(_c, _do)						\
 ({									\
-	struct btree_trans trans;					\
-	int _ret;							\
-									\
-	bch2_trans_init(&trans, (_c), 0, 0);				\
-	_ret = (_do);							\
-	bch2_trans_exit(&trans);					\
-									\
+	struct btree_trans *trans = bch2_trans_get(_c);			\
+	int _ret = (_do);						\
+	bch2_trans_put(trans);						\
 	_ret;								\
 })
 
+#define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do)		\
+	bch2_trans_run(_c, commit_do(trans, _disk_res, _journal_seq, _flags, _do))
+
 #define trans_for_each_update(_trans, _i)				\
 	for ((_i) = (_trans)->updates;					\
 	     (_i) < (_trans)->updates + (_trans)->nr_updates;		\
@@ -183,4 +185,152 @@ static inline void bch2_trans_reset_updates(struct btree_trans *trans)
 	}
 }
 
+static inline struct bkey_i *__bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k,
+						  unsigned type, unsigned min_bytes)
+{
+	unsigned bytes = max_t(unsigned, min_bytes, bkey_bytes(k.k));
+	struct bkey_i *mut;
+
+	if (type && k.k->type != type)
+		return ERR_PTR(-ENOENT);
+
+	mut = bch2_trans_kmalloc_nomemzero(trans, bytes);
+	if (!IS_ERR(mut)) {
+		bkey_reassemble(mut, k);
+
+		if (unlikely(bytes > bkey_bytes(k.k))) {
+			memset((void *) mut + bkey_bytes(k.k), 0,
+			       bytes - bkey_bytes(k.k));
+			mut->k.u64s = DIV_ROUND_UP(bytes, sizeof(u64));
+		}
+	}
+	return mut;
+}
+
+static inline struct bkey_i *bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k)
+{
+	return __bch2_bkey_make_mut_noupdate(trans, k, 0, 0);
+}
+
+#define bch2_bkey_make_mut_noupdate_typed(_trans, _k, _type)		\
+	bkey_i_to_##_type(__bch2_bkey_make_mut_noupdate(_trans, _k,	\
+				KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
+
+static inline struct bkey_i *__bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
+					struct bkey_s_c *k, unsigned flags,
+					unsigned type, unsigned min_bytes)
+{
+	struct bkey_i *mut = __bch2_bkey_make_mut_noupdate(trans, *k, type, min_bytes);
+	int ret;
+
+	if (IS_ERR(mut))
+		return mut;
+
+	ret = bch2_trans_update(trans, iter, mut, flags);
+	if (ret)
+		return ERR_PTR(ret);
+
+	*k = bkey_i_to_s_c(mut);
+	return mut;
+}
+
+static inline struct bkey_i *bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
+						struct bkey_s_c *k, unsigned flags)
+{
+	return __bch2_bkey_make_mut(trans, iter, k, flags, 0, 0);
+}
+
+#define bch2_bkey_make_mut_typed(_trans, _iter, _k, _flags, _type)	\
+	bkey_i_to_##_type(__bch2_bkey_make_mut(_trans, _iter, _k, _flags,\
+				KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
+
+static inline struct bkey_i *__bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
+					 struct btree_iter *iter,
+					 unsigned btree_id, struct bpos pos,
+					 unsigned flags, unsigned type, unsigned min_bytes)
+{
+	struct bkey_s_c k = __bch2_bkey_get_iter(trans, iter,
+				btree_id, pos, flags|BTREE_ITER_INTENT, type);
+	struct bkey_i *ret = IS_ERR(k.k)
+		? ERR_CAST(k.k)
+		: __bch2_bkey_make_mut_noupdate(trans, k, 0, min_bytes);
+	if (IS_ERR(ret))
+		bch2_trans_iter_exit(trans, iter);
+	return ret;
+}
+
+static inline struct bkey_i *bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
+					       struct btree_iter *iter,
+					       unsigned btree_id, struct bpos pos,
+					       unsigned flags)
+{
+	return __bch2_bkey_get_mut_noupdate(trans, iter, btree_id, pos, flags, 0, 0);
+}
+
+static inline struct bkey_i *__bch2_bkey_get_mut(struct btree_trans *trans,
+					 struct btree_iter *iter,
+					 unsigned btree_id, struct bpos pos,
+					 unsigned flags, unsigned type, unsigned min_bytes)
+{
+	struct bkey_i *mut = __bch2_bkey_get_mut_noupdate(trans, iter,
+				btree_id, pos, flags|BTREE_ITER_INTENT, type, min_bytes);
+	int ret;
+
+	if (IS_ERR(mut))
+		return mut;
+
+	ret = bch2_trans_update(trans, iter, mut, flags);
+	if (ret) {
+		bch2_trans_iter_exit(trans, iter);
+		return ERR_PTR(ret);
+	}
+
+	return mut;
+}
+
+static inline struct bkey_i *bch2_bkey_get_mut_minsize(struct btree_trans *trans,
+						       struct btree_iter *iter,
+						       unsigned btree_id, struct bpos pos,
+						       unsigned flags, unsigned min_bytes)
+{
+	return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, min_bytes);
+}
+
+static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
+					       struct btree_iter *iter,
+					       unsigned btree_id, struct bpos pos,
+					       unsigned flags)
+{
+	return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, 0);
+}
+
+#define bch2_bkey_get_mut_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
+	bkey_i_to_##_type(__bch2_bkey_get_mut(_trans, _iter,		\
+			_btree_id, _pos, _flags,			\
+			KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
+
+static inline struct bkey_i *__bch2_bkey_alloc(struct btree_trans *trans, struct btree_iter *iter,
+					       unsigned flags, unsigned type, unsigned val_size)
+{
+	struct bkey_i *k = bch2_trans_kmalloc(trans, sizeof(*k) + val_size);
+	int ret;
+
+	if (IS_ERR(k))
+		return k;
+
+	bkey_init(&k->k);
+	k->k.p = iter->pos;
+	k->k.type = type;
+	set_bkey_val_bytes(&k->k, val_size);
+
+	ret = bch2_trans_update(trans, iter, k, flags);
+	if (unlikely(ret))
+		return ERR_PTR(ret);
+	return k;
+}
+
+#define bch2_bkey_alloc(_trans, _iter, _flags, _type)			\
+	bkey_i_to_##_type(__bch2_bkey_alloc(_trans, _iter, _flags,	\
+				KEY_TYPE_##_type, sizeof(struct bch_##_type)))
+
 #endif /* _BCACHEFS_BTREE_UPDATE_H */