[PULL 34/36] migration: Respect exit-on-error when migration fails before resuming

[Peter Xu <peterx@redhat.com>]

From: Juraj Marcin <jmarcin@redhat.com>

When exit-on-error was added to migration, it wasn't added to postcopy.
Even though postcopy migration will usually pause and not fail, in cases
it does unrecoverably fail before destination side has been started,
exit-on-error will allow management to query the error.

Signed-off-by: Juraj Marcin <jmarcin@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20251103183301.3840862-7-jmarcin@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 migration/postcopy-ram.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 48cbb46c27..91431f02a4 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -2080,11 +2080,16 @@ bool postcopy_is_paused(MigrationStatus status)
 
 static void postcopy_listen_thread_bh(void *opaque)
 {
+    MigrationState *s = migrate_get_current();
     MigrationIncomingState *mis = migration_incoming_get_current();
 
     migration_incoming_state_destroy();
 
-    if (mis->state == MIGRATION_STATUS_FAILED) {
+    if (mis->state == MIGRATION_STATUS_FAILED && mis->exit_on_error) {
+        WITH_QEMU_LOCK_GUARD(&s->error_mutex) {
+            error_report_err(s->error);
+            s->error = NULL;
+        }
         /*
          * If something went wrong then we have a bad state so exit;
          * we only could have gotten here if something failed before
-- 
2.50.1