[PATCH V16 11/13] monitor/hmp: display IOThread holders

[Zhang Chen <zhangckid@gmail.com>]

Display holder information in info iothreads to aid manual debugging.

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Zhang Chen <zhangckid@gmail.com>
---
 monitor/hmp-cmds.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 91701ddf33..d7dd24d951 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -246,11 +246,31 @@ void hmp_info_iothreads(MonitorHMP *hmp, const QDict *qdict)
     IOThreadInfoList *info_list = qmp_query_iothreads(NULL);
     IOThreadInfoList *info;
     IOThreadInfo *value;
+    IOThreadHolderList *h;
 
     for (info = info_list; info; info = info->next) {
         value = info->value;
         monitor_hmp_printf(hmp, "%s:\n", value->id);
         monitor_hmp_printf(hmp, "  thread_id=%" PRId64 "\n", value->thread_id);
+        monitor_hmp_printf(hmp, "  holders=");
+        for (h = value->holders; h; h = h->next) {
+            IOThreadHolder *holder = h->value;
+
+            switch (holder->type) {
+            case IO_THREAD_HOLDER_KIND_BLOCK_EXPORT:
+                monitor_hmp_printf(hmp, "[block-export: %s]",
+                                   holder->u.block_export.export_id);
+                break;
+            case IO_THREAD_HOLDER_KIND_QOM_OBJECT:
+                monitor_hmp_printf(hmp, "[qom-path: %s]",
+                                   holder->u.qom_object.qom_path);
+                break;
+            default:
+                g_assert_not_reached();
+            }
+        }
+        monitor_hmp_printf(hmp, "\n");
+
         monitor_hmp_printf(hmp, "  poll-max-ns=%" PRId64 "\n", value->poll_max_ns);
         monitor_hmp_printf(hmp, "  poll-grow=%" PRId64 "\n", value->poll_grow);
         monitor_hmp_printf(hmp, "  poll-shrink=%" PRId64 "\n", value->poll_shrink);
-- 
2.43.0