X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrace-chunk.c;h=affe3ac2050186043d5abd0590173e2f3296bd11;hp=601d402e0843639ac9457269b4916d2ace8dce29;hb=6b584c2ece62c620a86cf438bb358a9da7962b7e;hpb=41d2ab71e4d18b7aa5c240eb3a2ed78eb41e0e52

diff --git a/src/common/trace-chunk.c b/src/common/trace-chunk.c
index 601d402e0..affe3ac20 100644
--- a/src/common/trace-chunk.c
+++ b/src/common/trace-chunk.c
@@ -1358,6 +1358,41 @@ lttng_trace_chunk_registry_find_chunk(
 			session_id, &chunk_id);
 }
 
+LTTNG_HIDDEN
+int lttng_trace_chunk_registry_chunk_exists(
+		const struct lttng_trace_chunk_registry *registry,
+		uint64_t session_id, uint64_t chunk_id, bool *chunk_exists)
+{
+	int ret = 0;
+	const struct lttng_trace_chunk_registry_element target_element = {
+		.chunk.id.is_set = true,
+		.chunk.id.value = chunk_id,
+		.session_id = session_id,
+	};
+	const unsigned long element_hash =
+			lttng_trace_chunk_registry_element_hash(
+				&target_element);
+	struct cds_lfht_node *published_node;
+	struct cds_lfht_iter iter;
+
+	rcu_read_lock();
+	cds_lfht_lookup(registry->ht,
+			element_hash,
+			lttng_trace_chunk_registry_element_match,
+			&target_element,
+			&iter);
+	published_node = cds_lfht_iter_get_node(&iter);
+	if (!published_node) {
+		*chunk_exists = false;
+		goto end;
+	}
+
+	*chunk_exists = !cds_lfht_is_node_deleted(published_node);
+end:
+	rcu_read_unlock();
+	return ret;
+}
+
 LTTNG_HIDDEN
 struct lttng_trace_chunk *
 lttng_trace_chunk_registry_find_anonymous_chunk(