In case of error, close_return_path_on_source() can perform a shutdown
to exit the return-path thread. However, in migrate_fd_cleanup(),
'to_dst_file' is closed before calling close_return_path_on_source()
and the shutdown fails, leaving the source and destination waiting for
an event to occur.
Close the file after calling close_return_path_on_source() so that the
shutdown succeeds and the return-path thread exits.
Signed-off-by: Cédric Le Goater <c...@redhat.com>
---
This is an RFC because the correct fix implies reworking the QEMUFile
construct, built on top of the QEMU I/O channel.
migration/migration.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index
5f55af3d7624750ca416c4177781241b3e291e5d..de329f2c553288935d824748286e79e535929b8b
100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1313,6 +1313,8 @@ void migrate_set_state(int *state, int old_state, int
new_state)
static void migrate_fd_cleanup(MigrationState *s)
{
+ QEMUFile *tmp = NULL;
+
g_free(s->hostname);
s->hostname = NULL;
json_writer_free(s->vmdesc);
@@ -1321,8 +1323,6 @@ static void migrate_fd_cleanup(MigrationState *s)
qemu_savevm_state_cleanup();
if (s->to_dst_file) {
- QEMUFile *tmp;
-
trace_migrate_fd_cleanup();
bql_unlock();
if (s->migration_thread_running) {
@@ -1341,15 +1341,14 @@ static void migrate_fd_cleanup(MigrationState *s)
* critical section won't block for long.
*/
migration_ioc_unregister_yank_from_file(tmp);
- qemu_fclose(tmp);
}
- /*
- * We already cleaned up to_dst_file, so errors from the return
- * path might be due to that, ignore them.
- */
close_return_path_on_source(s);
+ if (tmp) {
+ qemu_fclose(tmp);
+ }
+
assert(!migration_is_active(s));
if (s->state == MIGRATION_STATUS_CANCELLING) {
--
2.43.0
