During the vhost data path building process, qemu will create
a call fd at first, and create another call fd in the end.
The final call fd will be used to relay notify.
In the original code, after kick fd is set, dev_conf will
set the first call fd. Even though the actual call fd will set,
the data path will not work correctly.
Signed-off-by: Andy Pei <andy....@intel.com>
---
lib/vhost/vhost_user.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index e925428..82122b6 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -3230,12 +3230,26 @@ typedef int (*vhost_message_handler_t)(struct
virtio_net **pdev,
if (!vdpa_dev)
goto out;
+ if (request != VHOST_USER_SET_VRING_CALL)
+ goto out;
+
if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
if (vdpa_dev->ops->dev_conf(dev->vid))
VHOST_LOG_CONFIG(ERR, "(%s) failed to configure vDPA
device\n",
dev->ifname);
else
dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
+ } else {
+ /* when VIRTIO_DEV_VDPA_CONFIGURED already configured
+ * close the device and config the device again,
+ * make sure the call fd of each queue is configured correctly.
+ */
+ if (vdpa_dev->ops->dev_close(dev->vid))
+ VHOST_LOG_CONFIG(ERR,
+ "Failed to close vDPA device\n");
+ if (vdpa_dev->ops->dev_conf(dev->vid))
+ VHOST_LOG_CONFIG(ERR,
+ "Failed to re-config vDPA device\n");
}
out:
--
1.8.3.1
