fix GCC 5.0.0 logical-not-parentheses warnings

[qemu.git] / hw / net / vhost_net.c

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 5f06736a8c84df9dd848cef7a2c2a2b723a3dadd..cf23335ba227c86117db5025a6e1256d865b64b9 100644 (file)
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -15,6 +15,7 @@
 
 #include "net/net.h"
 #include "net/tap.h"
+#include "net/vhost-user.h"
 
 #include "hw/virtio/virtio-net.h"
 #include "net/vhost_net.h"
@@ -27,7 +28,6 @@
 #include <sys/socket.h>
 #include <linux/kvm.h>
 #include <fcntl.h>
-#include <linux/virtio_ring.h>
 #include <netpacket/packet.h>
 #include <net/ethernet.h>
 #include <net/if.h>
@@ -35,6 +35,7 @@
 
 #include <stdio.h>
 
+#include "standard-headers/linux/virtio_ring.h"
 #include "hw/virtio/vhost.h"
 #include "hw/virtio/virtio-bus.h"
 
@@ -55,7 +56,7 @@ static const int kernel_feature_bits[] = {
 };
 
 /* Features supported by others. */
-const int user_feature_bits[] = {
+static const int user_feature_bits[] = {
     VIRTIO_F_NOTIFY_ON_EMPTY,
     VIRTIO_RING_F_INDIRECT_DESC,
     VIRTIO_RING_F_EVENT_IDX,
@@ -114,6 +115,7 @@ unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
 
 void vhost_net_ack_features(struct vhost_net *net, unsigned features)
 {
+    net->dev.acked_features = net->dev.backend_features;
     vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
 }
 
@@ -161,11 +163,11 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
     if (r < 0) {
         goto fail;
     }
-    if (!qemu_has_vnet_hdr_len(options->net_backend,
-                               sizeof(struct virtio_net_hdr_mrg_rxbuf))) {
-        net->dev.features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
-    }
     if (backend_kernel) {
+        if (!qemu_has_vnet_hdr_len(options->net_backend,
+                               sizeof(struct virtio_net_hdr_mrg_rxbuf))) {
+            net->dev.features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+        }
         if (~net->dev.features & net->dev.backend_features) {
             fprintf(stderr, "vhost lacks feature mask %" PRIu64
                    " for backend\n",
@@ -187,20 +189,19 @@ bool vhost_net_query(VHostNetState *net, VirtIODevice *dev)
     return vhost_dev_query(&net->dev, dev);
 }
 
+static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index)
+{
+    net->dev.vq_index = vq_index;
+}
+
 static int vhost_net_start_one(struct vhost_net *net,
-                               VirtIODevice *dev,
-                               int vq_index)
+                               VirtIODevice *dev)
 {
     struct vhost_vring_file file = { };
     int r;
 
-    if (net->dev.started) {
-        return 0;
-    }
-
     net->dev.nvqs = 2;
     net->dev.vqs = net->vqs;
-    net->dev.vq_index = vq_index;
 
     r = vhost_dev_enable_notifiers(&net->dev, dev);
     if (r < 0) {
@@ -255,10 +256,6 @@ static void vhost_net_stop_one(struct vhost_net *net,
 {
     struct vhost_vring_file file = { .fd = -1 };
 
-    if (!net->dev.started) {
-        return;
-    }
-
     if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
         for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
             const VhostOps *vhost_ops = net->dev.vhost_ops;
@@ -274,13 +271,32 @@ static void vhost_net_stop_one(struct vhost_net *net,
     vhost_dev_disable_notifiers(&net->dev, dev);
 }
 
+static bool vhost_net_device_endian_ok(VirtIODevice *vdev)
+{
+#ifdef TARGET_IS_BIENDIAN
+#ifdef HOST_WORDS_BIGENDIAN
+    return virtio_is_big_endian(vdev);
+#else
+    return !virtio_is_big_endian(vdev);
+#endif
+#else
+    return true;
+#endif
+}
+
 int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
                     int total_queues)
 {
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
     VirtioBusState *vbus = VIRTIO_BUS(qbus);
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
-    int r, i = 0;
+    int r, e, i;
+
+    if (!vhost_net_device_endian_ok(dev)) {
+        error_report("vhost-net does not support cross-endian");
+        r = -ENOSYS;
+        goto err;
+    }
 
     if (!k->set_guest_notifiers) {
         error_report("binding does not support guest notifiers");
@@ -289,11 +305,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
     }
 
     for (i = 0; i < total_queues; i++) {
-        r = vhost_net_start_one(get_vhost_net(ncs[i].peer), dev, i * 2);
-
-        if (r < 0) {
-            goto err;
-        }
+        vhost_net_set_vq_index(get_vhost_net(ncs[i].peer), i * 2);
     }
 
     r = k->set_guest_notifiers(qbus->parent, total_queues * 2, true);
@@ -302,12 +314,26 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
         goto err;
     }
 
+    for (i = 0; i < total_queues; i++) {
+        r = vhost_net_start_one(get_vhost_net(ncs[i].peer), dev);
+
+        if (r < 0) {
+            goto err_start;
+        }
+    }
+
     return 0;
 
-err:
+err_start:
     while (--i >= 0) {
         vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
     }
+    e = k->set_guest_notifiers(qbus->parent, total_queues * 2, false);
+    if (e < 0) {
+        fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", e);
+        fflush(stderr);
+    }
+err:
     return r;
 }
 
@@ -319,16 +345,16 @@ void vhost_net_stop(VirtIODevice *dev, NetClientState *ncs,
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
     int i, r;
 
+    for (i = 0; i < total_queues; i++) {
+        vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
+    }
+
     r = k->set_guest_notifiers(qbus->parent, total_queues * 2, false);
     if (r < 0) {
         fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
         fflush(stderr);
     }
     assert(r >= 0);
-
-    for (i = 0; i < total_queues; i++) {
-        vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
-    }
 }
 
 void vhost_net_cleanup(struct vhost_net *net)
@@ -360,6 +386,9 @@ VHostNetState *get_vhost_net(NetClientState *nc)
     case NET_CLIENT_OPTIONS_KIND_TAP:
         vhost_net = tap_get_vhost_net(nc);
         break;
+    case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
+        vhost_net = vhost_user_get_vhost_net(nc);
+        break;
     default:
         break;
     }