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diff --git a/source3/rpc_server/mdssvc/mdssvc_es.h b/source3/rpc_server/mdssvc/mdssvc_es.h
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+/*
+   Unix SMB/CIFS implementation.
+   Main metadata server / Spotlight routines / HTTP/ES/JSON backend
+
+   Copyright (C) Ralph Boehme			2019
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _MDSSVC_ES_H_
+#define _MDSSVC_ES_H_
+
+#include <jansson.h>
+
+/*
+ * Some global state
+ */
+struct mdssvc_es_ctx {
+	struct mdssvc_ctx *mdssvc_ctx;
+	struct cli_credentials *creds;
+	json_t *mappings;
+};
+
+/*
+ * Per mdssvc RPC bind state
+ */
+struct mds_es_ctx {
+	/*
+	 * Pointer to higher level mds_ctx
+	 */
+	struct mds_ctx *mds_ctx;
+
+	/*
+	 * Pointer to our global context
+	 */
+	struct mdssvc_es_ctx *mdssvc_es_ctx;
+
+	/*
+	 * The HTTP connection handle to the ES server
+	 */
+	struct http_conn *http_conn;
+
+	/*
+	 * List of pending searches
+	 */
+	struct sl_es_search *searches;
+};
+
+/* Per search request */
+struct sl_es_search {
+	/*
+	 * List pointers
+	 */
+	struct sl_es_search *prev, *next;
+
+	/*
+	 * Search is being executed. Only the list head can be pending.
+	 */
+	bool pending;
+
+	/*
+	 * Shorthand to our tevent context
+	 */
+	struct tevent_context *ev;
+
+	/*
+	 * Pointer to the RPC connection ctx the request is using
+	 */
+	struct mds_es_ctx *mds_es_ctx;
+
+	/*
+	 * The upper mdssvc.c level query context
+	 */
+	struct sl_query *slq;
+
+	/*
+	 * Maximum number of results we process and total number of
+	 * results of a query.
+	 */
+	size_t total;
+	size_t max;
+
+	/*
+	 * For paging results
+	 */
+	size_t from;
+	size_t size;
+
+	/*
+	 * The translated Es query
+	 */
+	char *es_query;
+};
+
+extern struct mdssvc_backend mdsscv_backend_es;
+
+#endif /* _MDSSVC_ES_H_ */