[PATCH v2 2/4] vhost-user-common: send get_inflight_fd once

[Li Feng]

Get_inflight_fd is sent only once. When reconnecting to the backend,
qemu sent set_inflight_fd to the backend.

Signed-off-by: Li Feng <fen...@smartx.com>
---
 hw/scsi/vhost-scsi-common.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

diff --git a/hw/scsi/vhost-scsi-common.c b/hw/scsi/vhost-scsi-common.c
index a06f01af26..664adb15b4 100644
--- a/hw/scsi/vhost-scsi-common.c
+++ b/hw/scsi/vhost-scsi-common.c
@@ -52,20 +52,28 @@ int vhost_scsi_common_start(VHostSCSICommon *vsc)
 
     vsc->dev.acked_features = vdev->guest_features;
 
-    assert(vsc->inflight == NULL);
-    vsc->inflight = g_new0(struct vhost_inflight, 1);
-    ret = vhost_dev_get_inflight(&vsc->dev,
-                                 vs->conf.virtqueue_size,
-                                 vsc->inflight);
+    ret = vhost_dev_prepare_inflight(&vsc->dev, vdev);
     if (ret < 0) {
-        error_report("Error get inflight: %d", -ret);
+        error_report("Error setting inflight format: %d", -ret);
         goto err_guest_notifiers;
     }
 
-    ret = vhost_dev_set_inflight(&vsc->dev, vsc->inflight);
-    if (ret < 0) {
-        error_report("Error set inflight: %d", -ret);
-        goto err_guest_notifiers;
+    if (vsc->inflight) {
+        if (!vsc->inflight->addr) {
+            ret = vhost_dev_get_inflight(&vsc->dev,
+                                        vs->conf.virtqueue_size,
+                                        vsc->inflight);
+            if (ret < 0) {
+                error_report("Error get inflight: %d", -ret);
+                goto err_guest_notifiers;
+            }
+        }
+
+        ret = vhost_dev_set_inflight(&vsc->dev, vsc->inflight);
+        if (ret < 0) {
+            error_report("Error set inflight: %d", -ret);
+            goto err_guest_notifiers;
+        }
     }
 
     ret = vhost_dev_start(&vsc->dev, vdev, true);
@@ -85,9 +93,6 @@ int vhost_scsi_common_start(VHostSCSICommon *vsc)
     return ret;
 
 err_guest_notifiers:
-    g_free(vsc->inflight);
-    vsc->inflight = NULL;
-
     k->set_guest_notifiers(qbus->parent, vsc->dev.nvqs, false);
 err_host_notifiers:
     vhost_dev_disable_notifiers(&vsc->dev, vdev);
@@ -111,12 +116,6 @@ void vhost_scsi_common_stop(VHostSCSICommon *vsc)
     }
     assert(ret >= 0);
 
-    if (vsc->inflight) {
-        vhost_dev_free_inflight(vsc->inflight);
-        g_free(vsc->inflight);
-        vsc->inflight = NULL;
-    }
-
     vhost_dev_disable_notifiers(&vsc->dev, vdev);
 }
 
-- 
2.41.0