From 457cf54b708015520a8566088930c9c4f5bd6677 Mon Sep 17 00:00:00 2001
From: Nalin Dahyabhai <nalin.dahyabhai@pobox.com>
Date: Thu, 10 Jul 2008 15:15:18 -0400
Subject: - add a helper for checking if we've been called by ourselves - if a
 search was initiated by us, don't bother (and also don't deadlock)

---
 src/back-sch.c | 8 ++++++++
 src/back-shr.c | 9 +++++++++
 src/backend.h  | 5 +++++
 3 files changed, 22 insertions(+)

diff --git a/src/back-sch.c b/src/back-sch.c
index e11a7c6..3038978 100644
--- a/src/back-sch.c
+++ b/src/back-sch.c
@@ -730,6 +730,14 @@ backend_search_cb(Slapi_PBlock *pb)
 	cbdata.matched = "";
 	cbdata.text = "";
 	cbdata.n_entries = 0;
+	if (backend_shr_is_caller(cbdata.state, cbdata.pb)) {
+		slapi_log_error(SLAPI_LOG_PLUGIN,
+				cbdata.state->plugin_desc->spd_id,
+				"ignoring self-started search from \"%s\" for "
+				"\"%s\" with scope %d\n",
+				cbdata.target, cbdata.strfilter, cbdata.scope);
+		return 0;
+	}
 	slapi_log_error(SLAPI_LOG_PLUGIN, cbdata.state->plugin_desc->spd_id,
 			"searching from \"%s\" for \"%s\" with scope %d\n",
 			cbdata.target, cbdata.strfilter, cbdata.scope);
diff --git a/src/back-shr.c b/src/back-shr.c
index e21f5ee..0561e11 100644
--- a/src/back-shr.c
+++ b/src/back-shr.c
@@ -49,6 +49,15 @@
 #include "plugin.h"
 #include "map.h"
 
+/* Check if the caller for the current operation is *us*. */
+bool_t
+backend_shr_is_caller(struct plugin_state *state, Slapi_PBlock *pb)
+{
+	Slapi_ComponentId *identity;
+	slapi_pblock_get(pb, SLAPI_PLUGIN_IDENTITY, &identity);
+	return (identity == state->plugin_identity);
+}
+
 /* Read the name of this server.  Used by the map module on behalf of the
  * NIS service logic. */
 void
diff --git a/src/backend.h b/src/backend.h
index bd44fc7..bf7bb40 100644
--- a/src/backend.h
+++ b/src/backend.h
@@ -71,4 +71,9 @@ void backend_set_config_free_config(struct backend_shr_set_data *set_data);
  * requiring a restart. */
 void backend_update_params(struct plugin_state *state);
 
+/* Check if the operation which this pblock describes was initiated by the
+ * current plugin. */
+bool_t backend_shr_is_caller(struct plugin_state *state,
+			     struct slapi_pblock *pb);
+
 #endif
-- 
cgit