commit e4ec5ad464e48ab8d978b4dd8aacd05c1c4a87cc
author Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Tue Sep 17 14:58:19 2019 +0300
committer Kevin Wolf <kwolf@redhat.com> Mon Oct 14 17:12:48 2019 +0200
tree fb5bb4af2ee8c376cb3a237c46604a283514e208
parent ae25dccb7df64ec9cbb52d7a0a67308d74372cfd

replay: add BH oneshot event for block layer

Replay is capable of recording normal BH events, but sometimes
there are single use callbacks scheduled with aio_bh_schedule_oneshot
function. This patch enables recording and replaying such callbacks.
Block layer uses these events for calling the completion function.
Replaying these calls makes the execution deterministic.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block/iscsi.c

diff --git a/block/iscsi.c b/block/iscsi.c
index 506bf5f..2ced150 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -40,6 +40,7 @@
 #include "qemu/module.h"
 #include "qemu/option.h"
 #include "qemu/uuid.h"
+#include "sysemu/replay.h"
 #include "qapi/error.h"
 #include "qapi/qapi-commands-misc.h"
 #include "qapi/qmp/qdict.h"
@@ -280,8 +281,8 @@
     }
 
     if (iTask->co) {
-        aio_bh_schedule_oneshot(iTask->iscsilun->aio_context,
-                                 iscsi_co_generic_bh_cb, iTask);
+        replay_bh_schedule_oneshot_event(iTask->iscsilun->aio_context,
+                                         iscsi_co_generic_bh_cb, iTask);
     } else {
         iTask->complete = 1;
     }