1 files changed, 93 insertions, 0 deletions
diff --git a/src/crimson/os/seastore/onode_manager/staged-fltree/fwd.h b/src/crimson/os/seastore/onode_manager/staged-fltree/fwd.h
new file mode 100644
index 000000000..4908c691f
--- /dev/null
+++ b/src/crimson/os/seastore/onode_manager/staged-fltree/fwd.h
@@ -0,0 +1,93 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <algorithm>
+#include <cstring>
+#include <limits>
+#include <memory>
+#include <string>
+
+#include "crimson/common/errorator.h"
+#include "crimson/os/seastore/cached_extent.h"
+#include "crimson/os/seastore/seastore_types.h"
+#include "crimson/os/seastore/transaction.h"
+
+namespace crimson::os::seastore::onode {
+
+using crimson::os::seastore::Transaction;
+using crimson::os::seastore::TransactionRef;
+using crimson::os::seastore::make_transaction;
+using crimson::os::seastore::laddr_t;
+using crimson::os::seastore::L_ADDR_MIN;
+using crimson::os::seastore::L_ADDR_NULL;
+using crimson::os::seastore::extent_len_t;
+
+class DeltaRecorder;
+class NodeExtent;
+class NodeExtentManager;
+class RootNodeTracker;
+using DeltaRecorderURef = std::unique_ptr<DeltaRecorder>;
+using NodeExtentRef = crimson::os::seastore::TCachedExtentRef<NodeExtent>;
+using NodeExtentManagerURef = std::unique_ptr<NodeExtentManager>;
+using RootNodeTrackerURef = std::unique_ptr<RootNodeTracker>;
+struct context_t {
+  NodeExtentManager& nm;
+  Transaction& t;
+};
+
+class LeafNodeImpl;
+class InternalNodeImpl;
+class NodeImpl;
+using LeafNodeImplURef = std::unique_ptr<LeafNodeImpl>;
+using InternalNodeImplURef = std::unique_ptr<InternalNodeImpl>;
+using NodeImplURef = std::unique_ptr<NodeImpl>;
+
+using level_t = uint8_t;
+// a type only to index within a node, 32 bits should be enough
+using index_t = uint32_t;
+constexpr auto INDEX_END = std::numeric_limits<index_t>::max();
+constexpr auto INDEX_LAST = INDEX_END - 0x4;
+constexpr auto INDEX_UPPER_BOUND = INDEX_END - 0x8;
+inline bool is_valid_index(index_t index) { return index < INDEX_UPPER_BOUND; }
+
+// TODO: decide by NODE_BLOCK_SIZE
+using node_offset_t = uint16_t;
+constexpr node_offset_t DISK_BLOCK_SIZE = 1u << 12;
+constexpr node_offset_t NODE_BLOCK_SIZE = DISK_BLOCK_SIZE * 1u;
+
+enum class MatchKindBS : int8_t { NE = -1, EQ = 0 };
+
+enum class MatchKindCMP : int8_t { LT = -1, EQ = 0, GT };
+inline MatchKindCMP toMatchKindCMP(int value) {
+  if (value > 0) {
+    return MatchKindCMP::GT;
+  } else if (value < 0) {
+    return MatchKindCMP::LT;
+  } else {
+    return MatchKindCMP::EQ;
+  }
+}
+template <typename Type>
+MatchKindCMP toMatchKindCMP(const Type& l, const Type& r) {
+  int match = l - r;
+  return toMatchKindCMP(match);
+}
+
+inline MatchKindCMP toMatchKindCMP(
+    std::string_view l, std::string_view r) {
+  return toMatchKindCMP(l.compare(r));
+}
+
+inline MatchKindCMP reverse(MatchKindCMP cmp) {
+  if (cmp == MatchKindCMP::LT) {
+    return MatchKindCMP::GT;
+  } else if (cmp == MatchKindCMP::GT) {
+    return MatchKindCMP::LT;
+  } else {
+    return cmp;
+  }
+}
+
+}