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Diffstat (limited to 'hw/net/vhost_net.c')
-rw-r--r--hw/net/vhost_net.c228
1 files changed, 160 insertions, 68 deletions
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index a1de2f43a0..7ac7c21bdb 100644
--- 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 <sys/ioctl.h>
#include <linux/virtio_ring.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
@@ -46,39 +46,76 @@ struct vhost_net {
NetClientState *nc;
};
-unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
+/* Features supported by host kernel. */
+static const int kernel_feature_bits[] = {
+ VIRTIO_F_NOTIFY_ON_EMPTY,
+ VIRTIO_RING_F_INDIRECT_DESC,
+ VIRTIO_RING_F_EVENT_IDX,
+ VIRTIO_NET_F_MRG_RXBUF,
+ VHOST_INVALID_FEATURE_BIT
+};
+
+/* Features supported by others. */
+const int user_feature_bits[] = {
+ VIRTIO_F_NOTIFY_ON_EMPTY,
+ VIRTIO_RING_F_INDIRECT_DESC,
+ VIRTIO_RING_F_EVENT_IDX,
+
+ VIRTIO_F_ANY_LAYOUT,
+ VIRTIO_NET_F_CSUM,
+ VIRTIO_NET_F_GUEST_CSUM,
+ VIRTIO_NET_F_GSO,
+ VIRTIO_NET_F_GUEST_TSO4,
+ VIRTIO_NET_F_GUEST_TSO6,
+ VIRTIO_NET_F_GUEST_ECN,
+ VIRTIO_NET_F_GUEST_UFO,
+ VIRTIO_NET_F_HOST_TSO4,
+ VIRTIO_NET_F_HOST_TSO6,
+ VIRTIO_NET_F_HOST_ECN,
+ VIRTIO_NET_F_HOST_UFO,
+ VIRTIO_NET_F_MRG_RXBUF,
+ VIRTIO_NET_F_STATUS,
+ VIRTIO_NET_F_CTRL_VQ,
+ VIRTIO_NET_F_CTRL_RX,
+ VIRTIO_NET_F_CTRL_VLAN,
+ VIRTIO_NET_F_CTRL_RX_EXTRA,
+ VIRTIO_NET_F_CTRL_MAC_ADDR,
+ VIRTIO_NET_F_CTRL_GUEST_OFFLOADS,
+
+ VIRTIO_NET_F_MQ,
+
+ VHOST_INVALID_FEATURE_BIT
+};
+
+static const int *vhost_net_get_feature_bits(struct vhost_net *net)
{
- /* Clear features not supported by host kernel. */
- if (!(net->dev.features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY))) {
- features &= ~(1 << VIRTIO_F_NOTIFY_ON_EMPTY);
- }
- if (!(net->dev.features & (1 << VIRTIO_RING_F_INDIRECT_DESC))) {
- features &= ~(1 << VIRTIO_RING_F_INDIRECT_DESC);
- }
- if (!(net->dev.features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
- features &= ~(1 << VIRTIO_RING_F_EVENT_IDX);
- }
- if (!(net->dev.features & (1 << VIRTIO_NET_F_MRG_RXBUF))) {
- features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF);
+ const int *feature_bits = 0;
+
+ switch (net->nc->info->type) {
+ case NET_CLIENT_OPTIONS_KIND_TAP:
+ feature_bits = kernel_feature_bits;
+ break;
+ case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
+ feature_bits = user_feature_bits;
+ break;
+ default:
+ error_report("Feature bits not defined for this type: %d",
+ net->nc->info->type);
+ break;
}
- return features;
+
+ return feature_bits;
+}
+
+unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
+{
+ return vhost_get_features(&net->dev, vhost_net_get_feature_bits(net),
+ features);
}
void vhost_net_ack_features(struct vhost_net *net, unsigned features)
{
- net->dev.acked_features = net->dev.backend_features;
- if (features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) {
- net->dev.acked_features |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY);
- }
- if (features & (1 << VIRTIO_RING_F_INDIRECT_DESC)) {
- net->dev.acked_features |= (1 << VIRTIO_RING_F_INDIRECT_DESC);
- }
- if (features & (1 << VIRTIO_RING_F_EVENT_IDX)) {
- net->dev.acked_features |= (1 << VIRTIO_RING_F_EVENT_IDX);
- }
- if (features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
- net->dev.acked_features |= (1 << VIRTIO_NET_F_MRG_RXBUF);
- }
+ vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
}
static int vhost_net_get_fd(NetClientState *backend)
@@ -92,42 +129,52 @@ static int vhost_net_get_fd(NetClientState *backend)
}
}
-struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
- bool force)
+struct vhost_net *vhost_net_init(VhostNetOptions *options)
{
int r;
+ bool backend_kernel = options->backend_type == VHOST_BACKEND_TYPE_KERNEL;
struct vhost_net *net = g_malloc(sizeof *net);
- if (!backend) {
- fprintf(stderr, "vhost-net requires backend to be setup\n");
+
+ if (!options->net_backend) {
+ fprintf(stderr, "vhost-net requires net backend to be setup\n");
goto fail;
}
- r = vhost_net_get_fd(backend);
- if (r < 0) {
- goto fail;
+
+ if (backend_kernel) {
+ r = vhost_net_get_fd(options->net_backend);
+ if (r < 0) {
+ goto fail;
+ }
+ net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
+ ? 0 : (1 << VHOST_NET_F_VIRTIO_NET_HDR);
+ net->backend = r;
+ } else {
+ net->dev.backend_features = 0;
+ net->backend = -1;
}
- net->nc = backend;
- net->dev.backend_features = qemu_has_vnet_hdr(backend) ? 0 :
- (1 << VHOST_NET_F_VIRTIO_NET_HDR);
- net->backend = r;
+ net->nc = options->net_backend;
net->dev.nvqs = 2;
net->dev.vqs = net->vqs;
- r = vhost_dev_init(&net->dev, devfd, "/dev/vhost-net", force);
+ r = vhost_dev_init(&net->dev, options->opaque,
+ options->backend_type, options->force);
if (r < 0) {
goto fail;
}
- if (!qemu_has_vnet_hdr_len(backend,
+ 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",
- (uint64_t)(~net->dev.features & net->dev.backend_features));
- vhost_dev_cleanup(&net->dev);
- goto fail;
+ if (backend_kernel) {
+ if (~net->dev.features & net->dev.backend_features) {
+ fprintf(stderr, "vhost lacks feature mask %" PRIu64
+ " for backend\n",
+ (uint64_t)(~net->dev.features & net->dev.backend_features));
+ vhost_dev_cleanup(&net->dev);
+ goto fail;
+ }
}
-
/* Set sane init value. Override when guest acks. */
vhost_net_ack_features(net, 0);
return net;
@@ -166,24 +213,37 @@ static int vhost_net_start_one(struct vhost_net *net,
goto fail_start;
}
- net->nc->info->poll(net->nc, false);
- qemu_set_fd_handler(net->backend, NULL, NULL, NULL);
- file.fd = net->backend;
- for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
- r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
- if (r < 0) {
- r = -errno;
- goto fail;
+ if (net->nc->info->poll) {
+ net->nc->info->poll(net->nc, false);
+ }
+
+ if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
+ qemu_set_fd_handler(net->backend, NULL, NULL, NULL);
+ file.fd = net->backend;
+ for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+ r = vhost_ops->vhost_call(&net->dev, VHOST_NET_SET_BACKEND,
+ &file);
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
}
}
return 0;
fail:
file.fd = -1;
- while (file.index-- > 0) {
- int r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
- assert(r >= 0);
+ if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
+ while (file.index-- > 0) {
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+ int r = vhost_ops->vhost_call(&net->dev, VHOST_NET_SET_BACKEND,
+ &file);
+ assert(r >= 0);
+ }
+ }
+ if (net->nc->info->poll) {
+ net->nc->info->poll(net->nc, true);
}
- net->nc->info->poll(net->nc, true);
vhost_dev_stop(&net->dev, dev);
fail_start:
vhost_dev_disable_notifiers(&net->dev, dev);
@@ -200,11 +260,17 @@ static void vhost_net_stop_one(struct vhost_net *net,
return;
}
- for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
- int r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
- assert(r >= 0);
+ 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;
+ int r = vhost_ops->vhost_call(&net->dev, VHOST_NET_SET_BACKEND,
+ &file);
+ assert(r >= 0);
+ }
+ }
+ if (net->nc->info->poll) {
+ net->nc->info->poll(net->nc, true);
}
- net->nc->info->poll(net->nc, true);
vhost_dev_stop(&net->dev, dev);
vhost_dev_disable_notifiers(&net->dev, dev);
}
@@ -224,7 +290,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
}
for (i = 0; i < total_queues; i++) {
- r = vhost_net_start_one(tap_get_vhost_net(ncs[i].peer), dev, i * 2);
+ r = vhost_net_start_one(get_vhost_net(ncs[i].peer), dev, i * 2);
if (r < 0) {
goto err;
@@ -241,7 +307,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
err:
while (--i >= 0) {
- vhost_net_stop_one(tap_get_vhost_net(ncs[i].peer), dev);
+ vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
}
return r;
}
@@ -262,7 +328,7 @@ void vhost_net_stop(VirtIODevice *dev, NetClientState *ncs,
assert(r >= 0);
for (i = 0; i < total_queues; i++) {
- vhost_net_stop_one(tap_get_vhost_net(ncs[i].peer), dev);
+ vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
}
}
@@ -282,9 +348,30 @@ void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
{
vhost_virtqueue_mask(&net->dev, dev, idx, mask);
}
+
+VHostNetState *get_vhost_net(NetClientState *nc)
+{
+ VHostNetState *vhost_net = 0;
+
+ if (!nc) {
+ return 0;
+ }
+
+ switch (nc->info->type) {
+ 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;
+ }
+
+ return vhost_net;
+}
#else
-struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
- bool force)
+struct vhost_net *vhost_net_init(VhostNetOptions *options)
{
error_report("vhost-net support is not compiled in");
return NULL;
@@ -328,4 +415,9 @@ void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
int idx, bool mask)
{
}
+
+VHostNetState *get_vhost_net(NetClientState *nc)
+{
+ return 0;
+}
#endif
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-07 09:04:16 +0000