* GNU GPL, version 2 or (at your option) any later version.
*/
+#include "qemu/osdep.h"
#include "net/net.h"
#include "net/tap.h"
#include "net/vhost-user.h"
#include "net/vhost_net.h"
#include "qemu/error-report.h"
-#include "config.h"
#ifdef CONFIG_VHOST_NET
#include <linux/vhost.h>
#include <sys/socket.h>
#include <linux/kvm.h>
-#include <fcntl.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
-#include <stdio.h>
#include "standard-headers/linux/virtio_ring.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/virtio-bus.h"
-#include "hw/virtio/virtio-access.h"
struct vhost_net {
struct vhost_dev dev;
VIRTIO_RING_F_EVENT_IDX,
VIRTIO_NET_F_MRG_RXBUF,
VIRTIO_F_VERSION_1,
+ VIRTIO_NET_F_MTU,
+ VIRTIO_F_IOMMU_PLATFORM,
VHOST_INVALID_FEATURE_BIT
};
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_MTU,
+ VIRTIO_F_IOMMU_PLATFORM,
+
+ /* This bit implies RARP isn't sent by QEMU out of band */
+ VIRTIO_NET_F_GUEST_ANNOUNCE,
VIRTIO_NET_F_MQ,
const int *feature_bits = 0;
switch (net->nc->info->type) {
- case NET_CLIENT_OPTIONS_KIND_TAP:
+ case NET_CLIENT_DRIVER_TAP:
feature_bits = kernel_feature_bits;
break;
- case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
+ case NET_CLIENT_DRIVER_VHOST_USER:
feature_bits = user_feature_bits;
break;
default:
vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
}
+uint64_t vhost_net_get_max_queues(VHostNetState *net)
+{
+ return net->dev.max_queues;
+}
+
+uint64_t vhost_net_get_acked_features(VHostNetState *net)
+{
+ return net->dev.acked_features;
+}
+
static int vhost_net_get_fd(NetClientState *backend)
{
switch (backend->info->type) {
- case NET_CLIENT_OPTIONS_KIND_TAP:
+ case NET_CLIENT_DRIVER_TAP:
return tap_get_fd(backend);
default:
fprintf(stderr, "vhost-net requires tap backend\n");
{
int r;
bool backend_kernel = options->backend_type == VHOST_BACKEND_TYPE_KERNEL;
- struct vhost_net *net = g_malloc(sizeof *net);
+ struct vhost_net *net = g_new0(struct vhost_net, 1);
+ uint64_t features = 0;
if (!options->net_backend) {
fprintf(stderr, "vhost-net requires net backend to be setup\n");
goto fail;
}
+ net->nc = options->net_backend;
+
+ net->dev.max_queues = 1;
+ net->dev.nvqs = 2;
+ net->dev.vqs = net->vqs;
if (backend_kernel) {
r = vhost_net_get_fd(options->net_backend);
net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
? 0 : (1ULL << VHOST_NET_F_VIRTIO_NET_HDR);
net->backend = r;
+ net->dev.protocol_features = 0;
} else {
net->dev.backend_features = 0;
+ net->dev.protocol_features = 0;
net->backend = -1;
- }
- net->nc = options->net_backend;
- net->dev.nvqs = 2;
- net->dev.vqs = net->vqs;
+ /* vhost-user needs vq_index to initiate a specific queue pair */
+ net->dev.vq_index = net->nc->queue_index * net->dev.nvqs;
+ }
r = vhost_dev_init(&net->dev, options->opaque,
- options->backend_type);
+ options->backend_type, options->busyloop_timeout);
if (r < 0) {
goto fail;
}
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);
+ if (net->nc->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
+ features = vhost_user_get_acked_features(net->nc);
+ if (~net->dev.features & features) {
+ fprintf(stderr, "vhost lacks feature mask %" PRIu64
+ " for backend\n",
+ (uint64_t)(~net->dev.features & features));
+ goto fail;
+ }
+ }
+
+ vhost_net_ack_features(net, features);
+
return net;
+
fail:
+ vhost_dev_cleanup(&net->dev);
g_free(net);
return NULL;
}
net->dev.vq_index = vq_index;
}
-static int vhost_net_set_vnet_endian(VirtIODevice *dev, NetClientState *peer,
- bool set)
-{
- int r = 0;
-
- if (virtio_has_feature(dev, VIRTIO_F_VERSION_1) ||
- (virtio_legacy_is_cross_endian(dev) && !virtio_is_big_endian(dev))) {
- r = qemu_set_vnet_le(peer, set);
- if (r) {
- error_report("backend does not support LE vnet headers");
- }
- } else if (virtio_legacy_is_cross_endian(dev)) {
- r = qemu_set_vnet_be(peer, set);
- if (r) {
- error_report("backend does not support BE vnet headers");
- }
- }
-
- return r;
-}
-
static int vhost_net_start_one(struct vhost_net *net,
VirtIODevice *dev)
{
net->nc->info->poll(net->nc, false);
}
- if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
+ if (net->nc->info->type == NET_CLIENT_DRIVER_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);
+ r = vhost_net_set_backend(&net->dev, &file);
if (r < 0) {
r = -errno;
goto fail;
return 0;
fail:
file.fd = -1;
- if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
+ if (net->nc->info->type == NET_CLIENT_DRIVER_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);
+ int r = vhost_net_set_backend(&net->dev, &file);
assert(r >= 0);
}
}
{
struct vhost_vring_file file = { .fd = -1 };
- if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
+ if (net->nc->info->type == NET_CLIENT_DRIVER_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);
- }
- } else if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
- 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_RESET_OWNER,
- NULL);
+ int r = vhost_net_set_backend(&net->dev, &file);
assert(r >= 0);
}
}
if (!k->set_guest_notifiers) {
error_report("binding does not support guest notifiers");
- r = -ENOSYS;
- goto err;
- }
-
- r = vhost_net_set_vnet_endian(dev, ncs[0].peer, true);
- if (r < 0) {
- goto err;
+ return -ENOSYS;
}
for (i = 0; i < total_queues; i++) {
- vhost_net_set_vq_index(get_vhost_net(ncs[i].peer), i * 2);
- }
+ struct vhost_net *net;
+
+ net = get_vhost_net(ncs[i].peer);
+ vhost_net_set_vq_index(net, i * 2);
+
+ /* Suppress the masking guest notifiers on vhost user
+ * because vhost user doesn't interrupt masking/unmasking
+ * properly.
+ */
+ if (net->nc->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
+ dev->use_guest_notifier_mask = false;
+ }
+ }
r = k->set_guest_notifiers(qbus->parent, total_queues * 2, true);
if (r < 0) {
error_report("Error binding guest notifier: %d", -r);
- goto err_endian;
+ goto err;
}
for (i = 0; i < total_queues; i++) {
if (r < 0) {
goto err_start;
}
+
+ if (ncs[i].peer->vring_enable) {
+ /* restore vring enable state */
+ r = vhost_set_vring_enable(ncs[i].peer, ncs[i].peer->vring_enable);
+
+ if (r < 0) {
+ goto err_start;
+ }
+ }
}
return 0;
fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", e);
fflush(stderr);
}
-err_endian:
- vhost_net_set_vnet_endian(dev, ncs[0].peer, false);
err:
return r;
}
fflush(stderr);
}
assert(r >= 0);
-
- assert(vhost_net_set_vnet_endian(dev, ncs[0].peer, false) >= 0);
}
void vhost_net_cleanup(struct vhost_net *net)
{
vhost_dev_cleanup(&net->dev);
- g_free(net);
+}
+
+int vhost_net_notify_migration_done(struct vhost_net *net, char* mac_addr)
+{
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+
+ assert(vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
+ assert(vhost_ops->vhost_migration_done);
+
+ return vhost_ops->vhost_migration_done(&net->dev, mac_addr);
}
bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
}
switch (nc->info->type) {
- case NET_CLIENT_OPTIONS_KIND_TAP:
+ case NET_CLIENT_DRIVER_TAP:
vhost_net = tap_get_vhost_net(nc);
break;
- case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
+ case NET_CLIENT_DRIVER_VHOST_USER:
vhost_net = vhost_user_get_vhost_net(nc);
+ assert(vhost_net);
break;
default:
break;
return vhost_net;
}
+
+int vhost_set_vring_enable(NetClientState *nc, int enable)
+{
+ VHostNetState *net = get_vhost_net(nc);
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+
+ nc->vring_enable = enable;
+
+ if (vhost_ops && vhost_ops->vhost_set_vring_enable) {
+ return vhost_ops->vhost_set_vring_enable(&net->dev, enable);
+ }
+
+ return 0;
+}
+
+int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu)
+{
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+
+ if (!vhost_ops->vhost_net_set_mtu) {
+ return 0;
+ }
+
+ return vhost_ops->vhost_net_set_mtu(&net->dev, mtu);
+}
+
#else
+uint64_t vhost_net_get_max_queues(VHostNetState *net)
+{
+ return 1;
+}
+
struct vhost_net *vhost_net_init(VhostNetOptions *options)
{
error_report("vhost-net support is not compiled in");
{
return features;
}
+
void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
{
}
+uint64_t vhost_net_get_acked_features(VHostNetState *net)
+{
+ return 0;
+}
+
bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
{
return false;
{
}
+int vhost_net_notify_migration_done(struct vhost_net *net, char* mac_addr)
+{
+ return -1;
+}
+
VHostNetState *get_vhost_net(NetClientState *nc)
{
return 0;
}
+
+int vhost_set_vring_enable(NetClientState *nc, int enable)
+{
+ return 0;
+}
+
+int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu)
+{
+ return 0;
+}
#endif
projects / qemu.git / blobdiff