Ejemplo n.º 1
0
static void vhost_scsi_realize(DeviceState *dev, Error **errp)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
    VHostSCSI *s = VHOST_SCSI(dev);
    Error *err = NULL;
    int vhostfd = -1;
    int ret;

    if (!vs->conf.wwpn) {
        error_setg(errp, "vhost-scsi: missing wwpn");
        return;
    }

    if (vs->conf.vhostfd) {
        vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, errp);
        if (vhostfd == -1) {
            error_prepend(errp, "vhost-scsi: unable to parse vhostfd: ");
            return;
        }
    } else {
        vhostfd = open("/dev/vhost-scsi", O_RDWR);
        if (vhostfd < 0) {
            error_setg(errp, "vhost-scsi: open vhost char device failed: %s",
                       strerror(errno));
            return;
        }
    }

    virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output,
                               vhost_dummy_handle_output,
                               vhost_dummy_handle_output);
    if (err != NULL) {
        error_propagate(errp, err);
        close(vhostfd);
        return;
    }

    s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
    s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
    s->dev.vq_index = 0;
    s->dev.backend_features = 0;

    ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
                         VHOST_BACKEND_TYPE_KERNEL);
    if (ret < 0) {
        error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
                   strerror(-ret));
        return;
    }

    /* At present, channel and lun both are 0 for bootable vhost-scsi disk */
    s->channel = 0;
    s->lun = 0;
    /* Note: we can also get the minimum tpgt from kernel */
    s->target = vs->conf.boot_tpgt;

    error_setg(&s->migration_blocker,
            "vhost-scsi does not support migration");
    migrate_add_blocker(s->migration_blocker);
}
Ejemplo n.º 2
0
Archivo: tap.c Proyecto: PennPanda/qemu
int net_init_tap(const Netdev *netdev, const char *name,
                 NetClientState *peer, Error **errp)
{
    const NetdevTapOptions *tap;
    int fd, vnet_hdr = 0, i = 0, queues;
    /* for the no-fd, no-helper case */
    const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
    const char *downscript = NULL;
    Error *err = NULL;
    const char *vhostfdname;
    char ifname[128];

    assert(netdev->type == NET_CLIENT_DRIVER_TAP);
    tap = &netdev->u.tap;
    queues = tap->has_queues ? tap->queues : 1;
    vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;

    /* QEMU vlans does not support multiqueue tap, in this case peer is set.
     * For -netdev, peer is always NULL. */
    if (peer && (tap->has_queues || tap->has_fds || tap->has_vhostfds)) {
        error_setg(errp, "Multiqueue tap cannot be used with QEMU vlans");
        return -1;
    }

    if (tap->has_fd) {
        if (tap->has_ifname || tap->has_script || tap->has_downscript ||
            tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
            tap->has_fds || tap->has_vhostfds) {
            error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
                       "helper=, queues=, fds=, and vhostfds= "
                       "are invalid with fd=");
            return -1;
        }

        fd = monitor_fd_param(cur_mon, tap->fd, &err);
        if (fd == -1) {
            error_propagate(errp, err);
            return -1;
        }

        fcntl(fd, F_SETFL, O_NONBLOCK);

        vnet_hdr = tap_probe_vnet_hdr(fd);

        net_init_tap_one(tap, peer, "tap", name, NULL,
                         script, downscript,
                         vhostfdname, vnet_hdr, fd, &err);
        if (err) {
            error_propagate(errp, err);
            return -1;
        }
    } else if (tap->has_fds) {
        char **fds = g_new0(char *, MAX_TAP_QUEUES);
        char **vhost_fds = g_new0(char *, MAX_TAP_QUEUES);
        int nfds, nvhosts;

        if (tap->has_ifname || tap->has_script || tap->has_downscript ||
            tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
            tap->has_vhostfd) {
            error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
                       "helper=, queues=, and vhostfd= "
                       "are invalid with fds=");
            return -1;
        }

        nfds = get_fds(tap->fds, fds, MAX_TAP_QUEUES);
        if (tap->has_vhostfds) {
            nvhosts = get_fds(tap->vhostfds, vhost_fds, MAX_TAP_QUEUES);
            if (nfds != nvhosts) {
                error_setg(errp, "The number of fds passed does not match "
                           "the number of vhostfds passed");
                goto free_fail;
            }
        }

        for (i = 0; i < nfds; i++) {
            fd = monitor_fd_param(cur_mon, fds[i], &err);
            if (fd == -1) {
                error_propagate(errp, err);
                goto free_fail;
            }

            fcntl(fd, F_SETFL, O_NONBLOCK);

            if (i == 0) {
                vnet_hdr = tap_probe_vnet_hdr(fd);
            } else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
                error_setg(errp,
                           "vnet_hdr not consistent across given tap fds");
                goto free_fail;
            }

            net_init_tap_one(tap, peer, "tap", name, ifname,
                             script, downscript,
                             tap->has_vhostfds ? vhost_fds[i] : NULL,
                             vnet_hdr, fd, &err);
            if (err) {
                error_propagate(errp, err);
                goto free_fail;
            }
        }
        g_free(fds);
        g_free(vhost_fds);
        return 0;

free_fail:
        for (i = 0; i < nfds; i++) {
            g_free(fds[i]);
            g_free(vhost_fds[i]);
        }
        g_free(fds);
        g_free(vhost_fds);
        return -1;
    } else if (tap->has_helper) {
Ejemplo n.º 3
0
static void vhost_vsock_device_realize(DeviceState *dev, Error **errp)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VHostVSock *vsock = VHOST_VSOCK(dev);
    int vhostfd;
    int ret;

    /* Refuse to use reserved CID numbers */
    if (vsock->conf.guest_cid <= 2) {
        error_setg(errp, "guest-cid property must be greater than 2");
        return;
    }

    if (vsock->conf.guest_cid > UINT32_MAX) {
        error_setg(errp, "guest-cid property must be a 32-bit number");
        return;
    }

    if (vsock->conf.vhostfd) {
        vhostfd = monitor_fd_param(cur_mon, vsock->conf.vhostfd, errp);
        if (vhostfd == -1) {
            error_prepend(errp, "vhost-vsock: unable to parse vhostfd: ");
            return;
        }
    } else {
        vhostfd = open("/dev/vhost-vsock", O_RDWR);
        if (vhostfd < 0) {
            error_setg_errno(errp, -errno,
                             "vhost-vsock: failed to open vhost device");
            return;
        }
    }

    virtio_init(vdev, "vhost-vsock", VIRTIO_ID_VSOCK,
                sizeof(struct virtio_vsock_config));

    /* Receive and transmit queues belong to vhost */
    virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, vhost_vsock_handle_output);
    virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE, vhost_vsock_handle_output);

    /* The event queue belongs to QEMU */
    vsock->event_vq = virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE,
                                       vhost_vsock_handle_output);

    vsock->vhost_dev.nvqs = ARRAY_SIZE(vsock->vhost_vqs);
    vsock->vhost_dev.vqs = vsock->vhost_vqs;
    ret = vhost_dev_init(&vsock->vhost_dev, (void *)(uintptr_t)vhostfd,
                         VHOST_BACKEND_TYPE_KERNEL, 0);
    if (ret < 0) {
        error_setg_errno(errp, -ret, "vhost-vsock: vhost_dev_init failed");
        goto err_virtio;
    }

    ret = vhost_vsock_set_guest_cid(vsock);
    if (ret < 0) {
        error_setg_errno(errp, -ret, "vhost-vsock: unable to set guest cid");
        goto err_vhost_dev;
    }

    vsock->post_load_timer = NULL;
    return;

err_vhost_dev:
    vhost_dev_cleanup(&vsock->vhost_dev);
err_virtio:
    virtio_cleanup(vdev);
    close(vhostfd);
    return;
}
Ejemplo n.º 4
0
Archivo: tap.c Proyecto: PennPanda/qemu
static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
                             const char *model, const char *name,
                             const char *ifname, const char *script,
                             const char *downscript, const char *vhostfdname,
                             int vnet_hdr, int fd, Error **errp)
{
    Error *err = NULL;
    TAPState *s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
    int vhostfd;

    tap_set_sndbuf(s->fd, tap, &err);
    if (err) {
        error_propagate(errp, err);
        return;
    }

    if (tap->has_fd || tap->has_fds) {
        snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
    } else if (tap->has_helper) {
        snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s",
                 tap->helper);
    } else {
        snprintf(s->nc.info_str, sizeof(s->nc.info_str),
                 "ifname=%s,script=%s,downscript=%s", ifname, script,
                 downscript);

        if (strcmp(downscript, "no") != 0) {
            snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
            snprintf(s->down_script_arg, sizeof(s->down_script_arg),
                     "%s", ifname);
        }
    }

    if (tap->has_vhost ? tap->vhost :
        vhostfdname || (tap->has_vhostforce && tap->vhostforce)) {
        VhostNetOptions options;

        options.backend_type = VHOST_BACKEND_TYPE_KERNEL;
        options.net_backend = &s->nc;
        if (tap->has_poll_us) {
            options.busyloop_timeout = tap->poll_us;
        } else {
            options.busyloop_timeout = 0;
        }

        if (vhostfdname) {
            vhostfd = monitor_fd_param(cur_mon, vhostfdname, &err);
            if (vhostfd == -1) {
                error_propagate(errp, err);
                return;
            }
        } else {
            vhostfd = open("/dev/vhost-net", O_RDWR);
            if (vhostfd < 0) {
                error_setg_errno(errp, errno,
                                 "tap: open vhost char device failed");
                return;
            }
        }
        options.opaque = (void *)(uintptr_t)vhostfd;

        s->vhost_net = vhost_net_init(&options);
        if (!s->vhost_net) {
            error_setg(errp,
                       "vhost-net requested but could not be initialized");
            return;
        }
    } else if (vhostfdname) {
        error_setg(errp, "vhostfd(s)= is not valid without vhost");
    }
}
Ejemplo n.º 5
0
int net_init_tap(const NetClientOptions *opts, const char *name,
                 NetClientState *peer, Error **errp)
{
    const NetdevTapOptions *tap;
    int fd, vnet_hdr = 0, i = 0, queues;
    /* for the no-fd, no-helper case */
    const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */
    const char *downscript = NULL;
    Error *err = NULL;
    const char *vhostfdname;
    char ifname[128];

    assert(opts->type == NET_CLIENT_OPTIONS_KIND_TAP);
    tap = opts->u.tap.data;
    queues = tap->has_queues ? tap->queues : 1;
    vhostfdname = tap->has_vhostfd ? tap->vhostfd : NULL;

    /* QEMU vlans does not support multiqueue tap, in this case peer is set.
     * For -netdev, peer is always NULL. */
    if (peer && (tap->has_queues || tap->has_fds || tap->has_vhostfds)) {
        error_setg(errp, "Multiqueue tap cannot be used with QEMU vlans");
        return -1;
    }

    if (tap->has_fd) {
        if (tap->has_ifname || tap->has_script || tap->has_downscript ||
            tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
            tap->has_fds || tap->has_vhostfds) {
            error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
                       "helper=, queues=, fds=, and vhostfds= "
                       "are invalid with fd=");
            return -1;
        }

        fd = monitor_fd_param(cur_mon, tap->fd, &err);
        if (fd == -1) {
            error_propagate(errp, err);
            return -1;
        }

        fcntl(fd, F_SETFL, O_NONBLOCK);

        vnet_hdr = tap_probe_vnet_hdr(fd);

        net_init_tap_one(tap, peer, "tap", name, NULL,
                         script, downscript,
                         vhostfdname, vnet_hdr, fd, &err);
        if (err) {
            error_propagate(errp, err);
            return -1;
        }
    } else if (tap->has_fds) {
        char *fds[MAX_TAP_QUEUES];
        char *vhost_fds[MAX_TAP_QUEUES];
        int nfds, nvhosts;

        if (tap->has_ifname || tap->has_script || tap->has_downscript ||
            tap->has_vnet_hdr || tap->has_helper || tap->has_queues ||
            tap->has_vhostfd) {
            error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
                       "helper=, queues=, and vhostfd= "
                       "are invalid with fds=");
            return -1;
        }

        nfds = get_fds(tap->fds, fds, MAX_TAP_QUEUES);
        if (tap->has_vhostfds) {
            nvhosts = get_fds(tap->vhostfds, vhost_fds, MAX_TAP_QUEUES);
            if (nfds != nvhosts) {
                error_setg(errp, "The number of fds passed does not match "
                           "the number of vhostfds passed");
                return -1;
            }
        }

        for (i = 0; i < nfds; i++) {
            fd = monitor_fd_param(cur_mon, fds[i], &err);
            if (fd == -1) {
                error_propagate(errp, err);
                return -1;
            }

            fcntl(fd, F_SETFL, O_NONBLOCK);

            if (i == 0) {
                vnet_hdr = tap_probe_vnet_hdr(fd);
            } else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
                error_setg(errp,
                           "vnet_hdr not consistent across given tap fds");
                return -1;
            }

            net_init_tap_one(tap, peer, "tap", name, ifname,
                             script, downscript,
                             tap->has_vhostfds ? vhost_fds[i] : NULL,
                             vnet_hdr, fd, &err);
            if (err) {
                error_propagate(errp, err);
                return -1;
            }
        }
    } else if (tap->has_helper) {
        if (tap->has_ifname || tap->has_script || tap->has_downscript ||
            tap->has_vnet_hdr || tap->has_queues || tap->has_vhostfds) {
            error_setg(errp, "ifname=, script=, downscript=, vnet_hdr=, "
                       "queues=, and vhostfds= are invalid with helper=");
            return -1;
        }

        fd = net_bridge_run_helper(tap->helper, DEFAULT_BRIDGE_INTERFACE,
                                   errp);
        if (fd == -1) {
            return -1;
        }

        fcntl(fd, F_SETFL, O_NONBLOCK);
        vnet_hdr = tap_probe_vnet_hdr(fd);

        net_init_tap_one(tap, peer, "bridge", name, ifname,
                         script, downscript, vhostfdname,
                         vnet_hdr, fd, &err);
        if (err) {
            error_propagate(errp, err);
            close(fd);
            return -1;
        }
    } else {
        if (tap->has_vhostfds) {
            error_setg(errp, "vhostfds= is invalid if fds= wasn't specified");
            return -1;
        }
        script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT;
        downscript = tap->has_downscript ? tap->downscript :
            DEFAULT_NETWORK_DOWN_SCRIPT;

        if (tap->has_ifname) {
            pstrcpy(ifname, sizeof ifname, tap->ifname);
        } else {
            ifname[0] = '\0';
        }

        for (i = 0; i < queues; i++) {
            fd = net_tap_init(tap, &vnet_hdr, i >= 1 ? "no" : script,
                              ifname, sizeof ifname, queues > 1, errp);
            if (fd == -1) {
                return -1;
            }

            if (queues > 1 && i == 0 && !tap->has_ifname) {
                if (tap_fd_get_ifname(fd, ifname)) {
                    error_setg(errp, "Fail to get ifname");
                    close(fd);
                    return -1;
                }
            }

            net_init_tap_one(tap, peer, "tap", name, ifname,
                             i >= 1 ? "no" : script,
                             i >= 1 ? "no" : downscript,
                             vhostfdname, vnet_hdr, fd, &err);
            if (err) {
                error_propagate(errp, err);
                close(fd);
                return -1;
            }
        }
    }

    return 0;
}