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diff --git a/ceph/src/librbd/cache/pwl/rwl/Builder.h b/ceph/src/librbd/cache/pwl/rwl/Builder.h
new file mode 100644
index 000000000..c13c7b5ae
--- /dev/null
+++ b/ceph/src/librbd/cache/pwl/rwl/Builder.h
@@ -0,0 +1,107 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_CACHE_PWL_RWL_BUILDER_H
+#define CEPH_LIBRBD_CACHE_PWL_RWL_BUILDER_H
+
+#include <iostream>
+#include "LogEntry.h"
+#include "ReadRequest.h"
+#include "Request.h"
+#include "LogOperation.h"
+
+#include "librbd/cache/ImageWriteback.h"
+#include "librbd/cache/pwl/Builder.h"
+
+namespace librbd {
+namespace cache {
+namespace pwl {
+namespace rwl {
+
+template <typename T>
+class Builder : public pwl::Builder<T> {
+public:
+  std::shared_ptr<pwl::WriteLogEntry> create_write_log_entry(
+      uint64_t image_offset_bytes, uint64_t write_bytes) override {
+    return std::make_shared<WriteLogEntry>(image_offset_bytes, write_bytes);
+  }
+  std::shared_ptr<pwl::WriteLogEntry> create_write_log_entry(
+      std::shared_ptr<SyncPointLogEntry> sync_point_entry,
+      uint64_t image_offset_bytes, uint64_t write_bytes) override {
+    return std::make_shared<WriteLogEntry>(
+        sync_point_entry, image_offset_bytes, write_bytes);
+  }
+  std::shared_ptr<pwl::WriteLogEntry> create_writesame_log_entry(
+      uint64_t image_offset_bytes, uint64_t write_bytes,
+      uint32_t data_length) override {
+    return std::make_shared<WriteSameLogEntry>(
+        image_offset_bytes, write_bytes, data_length);
+  }
+  std::shared_ptr<pwl::WriteLogEntry> create_writesame_log_entry(
+      std::shared_ptr<SyncPointLogEntry> sync_point_entry,
+      uint64_t image_offset_bytes, uint64_t write_bytes,
+      uint32_t data_length) override {
+    return std::make_shared<WriteSameLogEntry>(
+        sync_point_entry, image_offset_bytes, write_bytes, data_length);
+  }
+  pwl::C_WriteRequest<T> *create_write_request(
+      T &pwl, utime_t arrived, io::Extents &&image_extents,
+      bufferlist&& bl, const int fadvise_flags, ceph::mutex &lock,
+      PerfCounters *perfcounter, Context *user_req) override {
+    return new C_WriteRequest<T>(
+        pwl, arrived, std::move(image_extents), std::move(bl),
+        fadvise_flags, lock, perfcounter, user_req);
+  }
+  pwl::C_WriteSameRequest<T> *create_writesame_request(
+      T &pwl, utime_t arrived, io::Extents &&image_extents,
+      bufferlist&& bl, const int fadvise_flags, ceph::mutex &lock,
+      PerfCounters *perfcounter, Context *user_req) override {
+    return new C_WriteSameRequest<T>(
+        pwl, arrived, std::move(image_extents), std::move(bl),
+        fadvise_flags, lock, perfcounter, user_req);
+  }
+  pwl::C_WriteRequest<T> *create_comp_and_write_request(
+      T &pwl, utime_t arrived, io::Extents &&image_extents,
+      bufferlist&& cmp_bl, bufferlist&& bl, uint64_t *mismatch_offset,
+      const int fadvise_flags, ceph::mutex &lock,
+      PerfCounters *perfcounter, Context *user_req) override {
+    return new rwl::C_CompAndWriteRequest<T>(
+        pwl, arrived, std::move(image_extents), std::move(cmp_bl),
+        std::move(bl), mismatch_offset, fadvise_flags,
+        lock, perfcounter, user_req);
+  }
+  std::shared_ptr<pwl::WriteLogOperation> create_write_log_operation(
+      WriteLogOperationSet &set, uint64_t image_offset_bytes,
+      uint64_t write_bytes, CephContext *cct,
+      std::shared_ptr<pwl::WriteLogEntry> write_log_entry) {
+    return std::make_shared<WriteLogOperation>(
+        set, image_offset_bytes, write_bytes, cct, write_log_entry);
+  }
+  std::shared_ptr<pwl::WriteLogOperation> create_write_log_operation(
+      WriteLogOperationSet &set, uint64_t image_offset_bytes,
+      uint64_t write_bytes, uint32_t data_len, CephContext *cct,
+      std::shared_ptr<pwl::WriteLogEntry> writesame_log_entry) {
+    return std::make_shared<WriteLogOperation>(
+        set, image_offset_bytes, write_bytes, data_len, cct,
+        writesame_log_entry);
+  }
+  std::shared_ptr<pwl::DiscardLogOperation> create_discard_log_operation(
+      std::shared_ptr<SyncPoint> sync_point, uint64_t image_offset_bytes,
+      uint64_t write_bytes, uint32_t discard_granularity_bytes,
+      utime_t dispatch_time, PerfCounters *perfcounter, CephContext *cct) {
+    return std::make_shared<DiscardLogOperation>(
+        sync_point, image_offset_bytes, write_bytes, discard_granularity_bytes,
+        dispatch_time, perfcounter, cct);
+  }
+  C_ReadRequest *create_read_request(CephContext *cct, utime_t arrived,
+      PerfCounters *perfcounter, ceph::bufferlist *bl, Context *on_finish) {
+    return new C_ReadRequest(cct, arrived, perfcounter, bl, on_finish);
+  }
+};
+
+} // namespace rwl
+} // namespace pwl
+} // namespace cache
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_CACHE_PWL_RWL_BUILDER_H