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diff --git a/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.h b/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.h
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+++ b/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_TEST_MEM_IO_CTX_IMPL_H
+#define CEPH_TEST_MEM_IO_CTX_IMPL_H
+
+#include "test/librados_test_stub/TestIoCtxImpl.h"
+#include "test/librados_test_stub/TestMemCluster.h"
+
+namespace librados {
+
+class TestMemRadosClient;
+
+class TestMemIoCtxImpl : public TestIoCtxImpl {
+public:
+  TestMemIoCtxImpl();
+  TestMemIoCtxImpl(TestMemRadosClient *client, int64_t m_pool_id,
+                   const std::string& pool_name,
+                   TestMemCluster::Pool *pool);
+  ~TestMemIoCtxImpl() override;
+
+  TestIoCtxImpl *clone() override;
+
+  int aio_remove(const std::string& oid, AioCompletionImpl *c) override;
+
+  int append(const std::string& oid, const bufferlist &bl,
+             const SnapContext &snapc) override;
+
+  int assert_exists(const std::string &oid) override;
+
+  int create(const std::string& oid, bool exclusive) override;
+  int list_snaps(const std::string& o, snap_set_t *out_snaps) override;
+  int omap_get_vals(const std::string& oid,
+                    const std::string& start_after,
+                    const std::string &filter_prefix,
+                    uint64_t max_return,
+                    std::map<std::string, bufferlist> *out_vals) override;
+  int omap_get_vals2(const std::string& oid,
+                    const std::string& start_after,
+                    const std::string &filter_prefix,
+                    uint64_t max_return,
+                    std::map<std::string, bufferlist> *out_vals,
+                    bool *pmore) override;
+  int omap_rm_keys(const std::string& oid,
+                   const std::set<std::string>& keys) override;
+  int omap_set(const std::string& oid, const std::map<std::string,
+               bufferlist> &map) override;
+  int read(const std::string& oid, size_t len, uint64_t off,
+           bufferlist *bl) override;
+  int remove(const std::string& oid, const SnapContext &snapc) override;
+  int selfmanaged_snap_create(uint64_t *snapid) override;
+  int selfmanaged_snap_remove(uint64_t snapid) override;
+  int selfmanaged_snap_rollback(const std::string& oid,
+                                uint64_t snapid) override;
+  int sparse_read(const std::string& oid, uint64_t off, uint64_t len,
+                  std::map<uint64_t,uint64_t> *m, bufferlist *data_bl) override;
+  int stat(const std::string& oid, uint64_t *psize, time_t *pmtime) override;
+  int truncate(const std::string& oid, uint64_t size,
+               const SnapContext &snapc) override;
+  int write(const std::string& oid, bufferlist& bl, size_t len,
+            uint64_t off, const SnapContext &snapc) override;
+  int write_full(const std::string& oid, bufferlist& bl,
+                 const SnapContext &snapc) override;
+  int writesame(const std::string& oid, bufferlist& bl, size_t len,
+                uint64_t off, const SnapContext &snapc) override;
+  int cmpext(const std::string& oid, uint64_t off, bufferlist& cmp_bl) override;
+  int xattr_get(const std::string& oid,
+                std::map<std::string, bufferlist>* attrset) override;
+  int xattr_set(const std::string& oid, const std::string &name,
+                bufferlist& bl) override;
+  int zero(const std::string& oid, uint64_t off, uint64_t len) override;
+
+protected:
+  TestMemCluster::Pool *get_pool() {
+    return m_pool;
+  }
+
+private:
+  TestMemIoCtxImpl(const TestMemIoCtxImpl&);
+
+  TestMemRadosClient *m_client = nullptr;
+  TestMemCluster::Pool *m_pool = nullptr;
+
+  void append_clone(bufferlist& src, bufferlist* dest);
+  size_t clip_io(size_t off, size_t len, size_t bl_len);
+  void ensure_minimum_length(size_t len, bufferlist *bl);
+
+  TestMemCluster::SharedFile get_file(const std::string &oid, bool write,
+                                      const SnapContext &snapc);
+
+};
+
+} // namespace librados
+
+#endif // CEPH_TEST_MEM_IO_CTX_IMPL_H