Fix: trace chunk reported unknown before close command execution

[lttng-tools.git] / src / common / trace-chunk.c

diff --git a/src/common/trace-chunk.c b/src/common/trace-chunk.c
index 601d402e0843639ac9457269b4916d2ace8dce29..affe3ac2050186043d5abd0590173e2f3296bd11 100644 (file)
--- 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(