[dpdk-dev] [PATCH v3 6/6] net/virtio-user: set status on socket reconnect

[Adrian Moreno]

Newer vhost-user backends will rely on SET_STATUS to start the device
so this required to support them.
Fixes: 57912824615f ("net/virtio-user: support vhost status setting")
Cc: maxime.coque...@redhat.com
Cc: sta...@dpdk.org

Signed-off-by: Adrian Moreno <amore...@redhat.com>
---
 drivers/net/virtio/virtio_user_ethdev.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/net/virtio/virtio_user_ethdev.c 
b/drivers/net/virtio/virtio_user_ethdev.c
index 142bdc0bd..40345193e 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -67,8 +67,7 @@ virtio_user_reset_queues_packed(struct rte_eth_dev *dev)
 static int
 virtio_user_server_reconnect(struct virtio_user_dev *dev)
 {
-       int ret;
-       int connectfd;
+       int ret, connectfd, old_status;
        struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
        struct virtio_hw *hw = eth_dev->data->dev_private;
        uint64_t protocol_features;
@@ -78,6 +77,14 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
                return -1;
 
        dev->vhostfd = connectfd;
+       old_status = vtpci_get_status(hw);
+
+       vtpci_reset(hw);
+
+       vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
+
+       vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
+
        if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
                                   &dev->device_features) < 0) {
                PMD_INIT_LOG(ERR, "get_features failed: %s",
@@ -116,14 +123,17 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
 
        /* For packed ring, resetting queues is required in reconnection. */
        if (vtpci_packed_queue(hw) &&
-          (vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_DRIVER_OK)) {
+          (old_status & VIRTIO_CONFIG_STATUS_DRIVER_OK)) {
                PMD_INIT_LOG(NOTICE, "Packets on the fly will be dropped"
                                " when packed ring reconnecting.");
                virtio_user_reset_queues_packed(eth_dev);
        }
 
-       ret = virtio_user_start_device(dev);
-       if (ret < 0)
+       vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
+
+       /* Start the device */
+       vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK);
+       if (!dev->started)
                return -1;
 
        if (dev->queue_pairs > 1) {
-- 
2.26.2