diff mbox series

[v2,1/7] migration: Display error in query-migrate irrelevant of status

Message ID 20230705163502.331007-2-peterx@redhat.com
State New
Headers show
Series migration: Better error handling in return path thread | expand

Commit Message

Peter Xu July 5, 2023, 4:34 p.m. UTC 
Display it as long as being set, irrelevant of FAILED status.  E.g., it may
also be applicable to PAUSED stage of postcopy, to provide hint on what has
gone wrong.

The error_mutex seems to be overlooked when referencing the error, add it
to be very safe.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2018404
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 qapi/migration.json   | 5 ++---
 migration/migration.c | 8 +++++---
 2 files changed, 7 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/qapi/migration.json b/qapi/migration.json
index c050081555..ade45d564d 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -222,9 +222,8 @@ 
 #     throttled during auto-converge.  This is only present when
 #     auto-converge has started throttling guest cpus.  (Since 2.7)
 #
-# @error-desc: the human readable error description string, when
-#     @status is 'failed'. Clients should not attempt to parse the
-#     error strings.  (Since 2.7)
+# @error-desc: the human readable error description string. Clients
+#     should not attempt to parse the error strings.  (Since 2.7)
 #
 # @postcopy-blocktime: total time when all vCPU were blocked during
 #     postcopy live migration.  This is only present when the
diff --git a/migration/migration.c b/migration/migration.c
index d75c2bd63c..6a4c245f74 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1039,9 +1039,6 @@  static void fill_source_migration_info(MigrationInfo *info)
         break;
     case MIGRATION_STATUS_FAILED:
         info->has_status = true;
-        if (s->error) {
-            info->error_desc = g_strdup(error_get_pretty(s->error));
-        }
         break;
     case MIGRATION_STATUS_CANCELLED:
         info->has_status = true;
@@ -1051,6 +1048,11 @@  static void fill_source_migration_info(MigrationInfo *info)
         break;
     }
     info->status = state;
+
+    QEMU_LOCK_GUARD(&s->error_mutex);
+    if (s->error) {
+        info->error_desc = g_strdup(error_get_pretty(s->error));
+    }
 }
 
 static void fill_destination_migration_info(MigrationInfo *info)