net/virtio-user: fix packed ring server mode

[dpdk.git] / drivers / net / virtio / virtio_user / vhost_kernel.c

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel.c b/drivers/net/virtio/virtio_user/vhost_kernel.c
index 6b19180..2c80507 100644 (file)
--- a/drivers/net/virtio/virtio_user/vhost_kernel.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel.c
@@ -8,7 +8,6 @@
 #include <unistd.h>
 
 #include <rte_memory.h>
-#include <rte_eal_memconfig.h>
 
 #include "vhost.h"
 #include "virtio_user_dev.h"
@@ -331,16 +330,34 @@ vhost_kernel_enable_queue_pair(struct virtio_user_dev *dev,
 
        vhostfd = dev->vhostfds[pair_idx];
 
+       if (dev->qp_enabled[pair_idx] == enable)
+               return 0;
+
        if (!enable) {
-               if (dev->tapfds[pair_idx] >= 0) {
-                       close(dev->tapfds[pair_idx]);
-                       dev->tapfds[pair_idx] = -1;
+               tapfd = dev->tapfds[pair_idx];
+               if (vhost_kernel_set_backend(vhostfd, -1) < 0) {
+                       PMD_DRV_LOG(ERR, "fail to set backend for vhost kernel");
+                       return -1;
                }
-               return vhost_kernel_set_backend(vhostfd, -1);
-       } else if (dev->tapfds[pair_idx] >= 0) {
+               if (req_mq && vhost_kernel_tap_set_queue(tapfd, false) < 0) {
+                       PMD_DRV_LOG(ERR, "fail to disable tap for vhost kernel");
+                       return -1;
+               }
+               dev->qp_enabled[pair_idx] = false;
                return 0;
        }
 
+       if (dev->tapfds[pair_idx] >= 0) {
+               tapfd = dev->tapfds[pair_idx];
+               if (vhost_kernel_tap_set_offload(tapfd, dev->features) == -1)
+                       return -1;
+               if (req_mq && vhost_kernel_tap_set_queue(tapfd, true) < 0) {
+                       PMD_DRV_LOG(ERR, "fail to enable tap for vhost kernel");
+                       return -1;
+               }
+               goto set_backend;
+       }
+
        if ((dev->features & (1ULL << VIRTIO_NET_F_MRG_RXBUF)) ||
            (dev->features & (1ULL << VIRTIO_F_VERSION_1)))
                hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
@@ -354,13 +371,15 @@ vhost_kernel_enable_queue_pair(struct virtio_user_dev *dev,
                return -1;
        }
 
+       dev->tapfds[pair_idx] = tapfd;
+
+set_backend:
        if (vhost_kernel_set_backend(vhostfd, tapfd) < 0) {
                PMD_DRV_LOG(ERR, "fail to set backend for vhost kernel");
-               close(tapfd);
                return -1;
        }
 
-       dev->tapfds[pair_idx] = tapfd;
+       dev->qp_enabled[pair_idx] = true;
        return 0;
 }