From 750328e01afe4776eaddacde406063978dbf1291 Mon Sep 17 00:00:00 2001
From: Ying Fang <fangying1@huawei.com>
Date: Mon, 29 Jul 2019 16:22:12 +0800
Subject: [PATCH] vhost: cancel migration when vhost-user restarted during
 migraiton

Qemu will abort when vhost-user process is restarted during migration
when vhost_log_global_start/stop is called. The reason is clear that
vhost_dev_set_log returns -1 because network connection is temporarily
lost. Let's cancel migraiton and report it to user in this abnormal
situation.

Signed-off-by: Ying Fang <fangying1@huawei.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
---
 hw/virtio/vhost.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 7f61018f..f302c506 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -26,6 +26,7 @@
 #include "hw/virtio/virtio-bus.h"
 #include "hw/virtio/virtio-access.h"
 #include "migration/blocker.h"
+#include "migration/migration.h"
 #include "sysemu/dma.h"
 #include "trace.h"
 
@@ -808,20 +809,24 @@ static int vhost_migration_log(MemoryListener *listener, int enable)
 static void vhost_log_global_start(MemoryListener *listener)
 {
     int r;
+    Error *errp = NULL;
 
     r = vhost_migration_log(listener, true);
     if (r < 0) {
-        abort();
+        error_setg(&errp, "Failed to start vhost migration log");
+        migrate_fd_error(migrate_get_current(), errp);
     }
 }
 
 static void vhost_log_global_stop(MemoryListener *listener)
 {
     int r;
+    Error *errp = NULL;
 
     r = vhost_migration_log(listener, false);
     if (r < 0) {
-        abort();
+        error_setg(&errp, "Failed to stop vhost migration log");
+        migrate_fd_error(migrate_get_current(), errp);
     }
 }
 
-- 
2.19.1