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diff --git a/ioreplay/src/meta/meta.h b/ioreplay/src/meta/meta.h
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+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef META_H
+#define META_H
+
+#include "../defaults.h"
+
+/**
+ * @brief The meta information definition
+ *
+ * This is used to write or read meta information to/from the header
+ * of the .replay file. This information then is used by ioreplay
+ * in other steps. E.g. reading the amount of used file descriptors
+ * from the meta header in order to allocate data structures of the
+ * correct sizes before running the test!
+ */
+typedef struct meta_s_ {
+    FILE* replay_fd; /**< The FS of the .replay file */
+    off_t offset; /**< The meta offset (usually 0) */
+    char* read_buf; /**< Pointer to a read buffer */
+} meta_s;
+
+/**
+ * @brief Creates a new meta bject
+ *
+ * @return The new meta object
+ */
+meta_s* meta_new();
+
+/**
+ * @brief Destroys a meta object
+ *
+ * @param m The meta object
+ */
+void meta_destroy(meta_s *m);
+
+/**
+ * @brief Reserves space in the .replay file for the meta header
+ *
+ * @param m The meta object
+ */
+void meta_reserve(meta_s *m);
+
+/**
+ * @brief Indicates that we start writing the meta header to the .replay file
+ *
+ * @param m The meta object
+ */
+void meta_write_start(meta_s *m);
+
+/**
+ * @brief Writes a string to the meta header
+ *
+ * @param m The meta object
+ * @param key The key
+ * @param val The string value
+ */
+void meta_write_s(meta_s *m, char *key, char *val);
+
+/**
+ * @brief Writes a long to the meta header
+ *
+ * @param m The meta object
+ * @param key The key
+ * @param val The long value
+ */
+void meta_write_l(meta_s *m, char *key, long val);
+
+/**
+ * @brief indicates that we start reading from the meta header
+ *
+ * @param m The meta object
+ */
+void meta_read_start(meta_s *m);
+
+/**
+ * @brief Reads a string from the meta header
+ *
+ * @param m The meta object
+ * @param key The key
+ * @param val The string val read
+ */
+bool meta_read_s(meta_s *m, char *key, char **val);
+
+/**
+ * @brief Reads a long from the meta header
+ *
+ * @param m The meta object
+ * @param key The key
+ * @param val The long val read
+ */
+bool meta_read_l(meta_s *m, char *key, long *val);
+
+#endif // META_H
+