As we use QAPI NetClientState->stored_config to store and get information about backend network devices, we can drop fill of legacy field info_str for them. We still use info_str field for NIC and hubports, so we can not completely remove it. Signed-off-by: Alexey Kirillov <lekiravi@yandex-team.ru> Signed-off-by: Jason Wang <jasowang@redhat.com>
247 lines
6.5 KiB
C
247 lines
6.5 KiB
C
/*
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* vhost-vdpa.c
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*
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* Copyright(c) 2017-2018 Intel Corporation.
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* Copyright(c) 2020 Red Hat, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "clients.h"
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#include "net/vhost_net.h"
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#include "net/vhost-vdpa.h"
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#include "hw/virtio/vhost-vdpa.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "qemu/option.h"
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#include "qapi/error.h"
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#include <sys/ioctl.h>
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#include <err.h>
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#include "standard-headers/linux/virtio_net.h"
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#include "monitor/monitor.h"
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#include "hw/virtio/vhost.h"
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/* Todo:need to add the multiqueue support here */
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typedef struct VhostVDPAState {
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NetClientState nc;
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struct vhost_vdpa vhost_vdpa;
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VHostNetState *vhost_net;
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uint64_t acked_features;
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bool started;
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} VhostVDPAState;
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const int vdpa_feature_bits[] = {
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VIRTIO_F_NOTIFY_ON_EMPTY,
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VIRTIO_RING_F_INDIRECT_DESC,
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VIRTIO_RING_F_EVENT_IDX,
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VIRTIO_F_ANY_LAYOUT,
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VIRTIO_F_VERSION_1,
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VIRTIO_NET_F_CSUM,
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VIRTIO_NET_F_GUEST_CSUM,
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VIRTIO_NET_F_GSO,
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VIRTIO_NET_F_GUEST_TSO4,
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VIRTIO_NET_F_GUEST_TSO6,
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VIRTIO_NET_F_GUEST_ECN,
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VIRTIO_NET_F_GUEST_UFO,
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VIRTIO_NET_F_HOST_TSO4,
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VIRTIO_NET_F_HOST_TSO6,
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VIRTIO_NET_F_HOST_ECN,
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VIRTIO_NET_F_HOST_UFO,
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VIRTIO_NET_F_MRG_RXBUF,
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VIRTIO_NET_F_MTU,
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VIRTIO_F_IOMMU_PLATFORM,
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VIRTIO_F_RING_PACKED,
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VIRTIO_NET_F_GUEST_ANNOUNCE,
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VIRTIO_NET_F_STATUS,
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VHOST_INVALID_FEATURE_BIT
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};
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VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc)
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{
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VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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return s->vhost_net;
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}
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uint64_t vhost_vdpa_get_acked_features(NetClientState *nc)
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{
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VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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s->acked_features = vhost_net_get_acked_features(s->vhost_net);
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return s->acked_features;
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}
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static int vhost_vdpa_net_check_device_id(struct vhost_net *net)
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{
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uint32_t device_id;
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int ret;
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struct vhost_dev *hdev;
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hdev = (struct vhost_dev *)&net->dev;
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ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id);
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if (device_id != VIRTIO_ID_NET) {
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return -ENOTSUP;
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}
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return ret;
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}
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static void vhost_vdpa_del(NetClientState *ncs)
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{
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VhostVDPAState *s;
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assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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s = DO_UPCAST(VhostVDPAState, nc, ncs);
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if (s->vhost_net) {
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vhost_net_cleanup(s->vhost_net);
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}
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}
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static int vhost_vdpa_add(NetClientState *ncs, void *be)
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{
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VhostNetOptions options;
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struct vhost_net *net = NULL;
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VhostVDPAState *s;
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int ret;
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options.backend_type = VHOST_BACKEND_TYPE_VDPA;
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assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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s = DO_UPCAST(VhostVDPAState, nc, ncs);
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options.net_backend = ncs;
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options.opaque = be;
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options.busyloop_timeout = 0;
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net = vhost_net_init(&options);
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if (!net) {
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error_report("failed to init vhost_net for queue");
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goto err;
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}
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if (s->vhost_net) {
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vhost_net_cleanup(s->vhost_net);
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g_free(s->vhost_net);
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}
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s->vhost_net = net;
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ret = vhost_vdpa_net_check_device_id(net);
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if (ret) {
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goto err;
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}
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return 0;
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err:
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if (net) {
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vhost_net_cleanup(net);
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}
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vhost_vdpa_del(ncs);
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return -1;
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}
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static void vhost_vdpa_cleanup(NetClientState *nc)
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{
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VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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if (s->vhost_net) {
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vhost_net_cleanup(s->vhost_net);
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g_free(s->vhost_net);
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s->vhost_net = NULL;
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}
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if (s->vhost_vdpa.device_fd >= 0) {
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qemu_close(s->vhost_vdpa.device_fd);
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s->vhost_vdpa.device_fd = -1;
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}
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}
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static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc)
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{
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assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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return true;
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}
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static bool vhost_vdpa_has_ufo(NetClientState *nc)
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{
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assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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uint64_t features = 0;
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features |= (1ULL << VIRTIO_NET_F_HOST_UFO);
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features = vhost_net_get_features(s->vhost_net, features);
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return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO));
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}
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static NetClientInfo net_vhost_vdpa_info = {
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.type = NET_CLIENT_DRIVER_VHOST_VDPA,
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.size = sizeof(VhostVDPAState),
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.cleanup = vhost_vdpa_cleanup,
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.has_vnet_hdr = vhost_vdpa_has_vnet_hdr,
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.has_ufo = vhost_vdpa_has_ufo,
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};
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static int net_vhost_vdpa_init(NetClientState *peer, const char *device,
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const char *name, const char *vhostdev)
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{
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NetClientState *nc = NULL;
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VhostVDPAState *s;
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int vdpa_device_fd = -1;
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int ret = 0;
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NetdevVhostVDPAOptions *stored;
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assert(name);
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nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, name);
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/* Store startup parameters */
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nc->stored_config = g_new0(NetdevInfo, 1);
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nc->stored_config->type = NET_BACKEND_VHOST_VDPA;
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stored = &nc->stored_config->u.vhost_vdpa;
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stored->has_vhostdev = true;
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stored->vhostdev = g_strdup(vhostdev);
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stored->has_queues = true;
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stored->queues = 1; /* TODO: change when support multiqueue */
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nc->queue_index = 0;
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s = DO_UPCAST(VhostVDPAState, nc, nc);
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vdpa_device_fd = qemu_open_old(vhostdev, O_RDWR);
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if (vdpa_device_fd == -1) {
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return -errno;
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}
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s->vhost_vdpa.device_fd = vdpa_device_fd;
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ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa);
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assert(s->vhost_net);
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return ret;
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}
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static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
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{
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const char *name = opaque;
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const char *driver, *netdev;
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driver = qemu_opt_get(opts, "driver");
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netdev = qemu_opt_get(opts, "netdev");
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if (!driver || !netdev) {
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return 0;
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}
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if (strcmp(netdev, name) == 0 &&
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!g_str_has_prefix(driver, "virtio-net-")) {
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error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*");
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return -1;
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}
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return 0;
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}
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int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
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NetClientState *peer, Error **errp)
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{
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const NetdevVhostVDPAOptions *opts;
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assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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opts = &netdev->u.vhost_vdpa;
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/* verify net frontend */
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if (qemu_opts_foreach(qemu_find_opts("device"), net_vhost_check_net,
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(char *)name, errp)) {
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return -1;
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}
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return net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, opts->vhostdev);
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}
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