diff mbox series

[PULL,v2,67/78] vhost-user-common: send get_inflight_fd once

Message ID 63a5c46a151c0d281d456de0474b7a27e87cd7ce.1697739629.git.mst@redhat.com
State New
Headers show
Series [PULL,v2,01/78] vdpa: Use iovec for vhost_vdpa_net_cvq_add() | expand

Commit Message

Michael S. Tsirkin Oct. 19, 2023, 6:24 p.m. UTC 
From: Li Feng <fengli@smartx.com>

Currently the get_inflight_fd will be sent every time the device is started, and
the backend will allocate shared memory to save the inflight state. If the
backend finds that it receives the second get_inflight_fd, it will release the
previous shared memory, which breaks inflight working logic.

This patch is a preparation for the following patches.

Signed-off-by: Li Feng <fengli@smartx.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20231009044735.941655-2-fengli@smartx.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/scsi/vhost-scsi-common.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)
diff mbox series

Patch

diff --git a/hw/scsi/vhost-scsi-common.c b/hw/scsi/vhost-scsi-common.c
index a06f01af26..a61cd0e907 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 getting inflight: %d", -ret);
+                goto err_guest_notifiers;
+            }
+        }
+
+        ret = vhost_dev_set_inflight(&vsc->dev, vsc->inflight);
+        if (ret < 0) {
+            error_report("Error setting 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);
 }