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-rw-r--r--hw/vhost_net.c328
1 files changed, 0 insertions, 328 deletions
diff --git a/hw/vhost_net.c b/hw/vhost_net.c
deleted file mode 100644
index d3218a0..0000000
--- a/hw/vhost_net.c
+++ /dev/null
@@ -1,328 +0,0 @@
-/*
- * vhost-net support
- *
- * Copyright Red Hat, Inc. 2010
- *
- * Authors:
- * Michael S. Tsirkin <mst@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Contributions after 2012-01-13 are licensed under the terms of the
- * GNU GPL, version 2 or (at your option) any later version.
- */
-
-#include "net/net.h"
-#include "net/tap.h"
-
-#include "hw/virtio-net.h"
-#include "hw/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 <sys/ioctl.h>
-#include <linux/virtio_ring.h>
-#include <netpacket/packet.h>
-#include <net/ethernet.h>
-#include <net/if.h>
-#include <netinet/in.h>
-
-#include <stdio.h>
-
-#include "hw/vhost.h"
-
-struct vhost_net {
- struct vhost_dev dev;
- struct vhost_virtqueue vqs[2];
- int backend;
- NetClientState *nc;
-};
-
-unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
-{
- /* 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);
- }
- return 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);
- }
-}
-
-static int vhost_net_get_fd(NetClientState *backend)
-{
- switch (backend->info->type) {
- case NET_CLIENT_OPTIONS_KIND_TAP:
- return tap_get_fd(backend);
- default:
- fprintf(stderr, "vhost-net requires tap backend\n");
- return -EBADFD;
- }
-}
-
-struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
- bool force)
-{
- int r;
- struct vhost_net *net = g_malloc(sizeof *net);
- if (!backend) {
- fprintf(stderr, "vhost-net requires backend to be setup\n");
- goto fail;
- }
- r = vhost_net_get_fd(backend);
- if (r < 0) {
- goto fail;
- }
- net->nc = backend;
- net->dev.backend_features = tap_has_vnet_hdr(backend) ? 0 :
- (1 << VHOST_NET_F_VIRTIO_NET_HDR);
- net->backend = r;
-
- net->dev.nvqs = 2;
- net->dev.vqs = net->vqs;
-
- r = vhost_dev_init(&net->dev, devfd, "/dev/vhost-net", force);
- if (r < 0) {
- goto fail;
- }
- if (!tap_has_vnet_hdr_len(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;
- }
-
- /* Set sane init value. Override when guest acks. */
- vhost_net_ack_features(net, 0);
- return net;
-fail:
- g_free(net);
- return NULL;
-}
-
-bool vhost_net_query(VHostNetState *net, VirtIODevice *dev)
-{
- return vhost_dev_query(&net->dev, dev);
-}
-
-static int vhost_net_start_one(struct vhost_net *net,
- VirtIODevice *dev,
- int vq_index)
-{
- 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) {
- goto fail_notifiers;
- }
-
- r = vhost_dev_start(&net->dev, dev);
- if (r < 0) {
- 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;
- }
- }
- return 0;
-fail:
- file.fd = -1;
- while (file.index-- > 0) {
- int r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
- assert(r >= 0);
- }
- net->nc->info->poll(net->nc, true);
- vhost_dev_stop(&net->dev, dev);
-fail_start:
- vhost_dev_disable_notifiers(&net->dev, dev);
-fail_notifiers:
- return r;
-}
-
-static void vhost_net_stop_one(struct vhost_net *net,
- VirtIODevice *dev)
-{
- struct vhost_vring_file file = { .fd = -1 };
-
- if (!net->dev.started) {
- 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);
- }
- net->nc->info->poll(net->nc, true);
- vhost_dev_stop(&net->dev, dev);
- vhost_dev_disable_notifiers(&net->dev, dev);
-}
-
-int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
- int total_queues)
-{
- int r, i = 0;
-
- if (!dev->binding->set_guest_notifiers) {
- error_report("binding does not support guest notifiers");
- r = -ENOSYS;
- goto err;
- }
-
- for (i = 0; i < total_queues; i++) {
- r = vhost_net_start_one(tap_get_vhost_net(ncs[i].peer), dev, i * 2);
-
- if (r < 0) {
- goto err;
- }
- }
-
- r = dev->binding->set_guest_notifiers(dev->binding_opaque,
- total_queues * 2,
- true);
- if (r < 0) {
- error_report("Error binding guest notifier: %d", -r);
- goto err;
- }
-
- return 0;
-
-err:
- while (--i >= 0) {
- vhost_net_stop_one(tap_get_vhost_net(ncs[i].peer), dev);
- }
- return r;
-}
-
-void vhost_net_stop(VirtIODevice *dev, NetClientState *ncs,
- int total_queues)
-{
- int i, r;
-
- r = dev->binding->set_guest_notifiers(dev->binding_opaque,
- 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(tap_get_vhost_net(ncs[i].peer), dev);
- }
-}
-
-void vhost_net_cleanup(struct vhost_net *net)
-{
- vhost_dev_cleanup(&net->dev);
- g_free(net);
-}
-
-bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
-{
- return vhost_virtqueue_pending(&net->dev, idx);
-}
-
-void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
- int idx, bool mask)
-{
- vhost_virtqueue_mask(&net->dev, dev, idx, mask);
-}
-#else
-struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
- bool force)
-{
- error_report("vhost-net support is not compiled in");
- return NULL;
-}
-
-bool vhost_net_query(VHostNetState *net, VirtIODevice *dev)
-{
- return false;
-}
-
-int vhost_net_start(VirtIODevice *dev,
- NetClientState *ncs,
- int total_queues)
-{
- return -ENOSYS;
-}
-void vhost_net_stop(VirtIODevice *dev,
- NetClientState *ncs,
- int total_queues)
-{
-}
-
-void vhost_net_cleanup(struct vhost_net *net)
-{
-}
-
-unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
-{
- return features;
-}
-void vhost_net_ack_features(struct vhost_net *net, unsigned features)
-{
-}
-
-bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
-{
- return -ENOSYS;
-}
-
-void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
- int idx, bool mask)
-{
-}
-#endif
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