[mirror_qemu.git] / hw / virtio / vhost-user-fs.c

/*
 * Vhost-user filesystem virtio device
 *
 * Copyright 2018-2019 Red Hat, Inc.
 *
 * Authors:
 *  Stefan Hajnoczi <stefanha@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * (at your option) any later version.  See the COPYING file in the
 * top-level directory.
 */

#include "qemu/osdep.h"
#include <sys/ioctl.h>
#include "standard-headers/linux/virtio_fs.h"
#include "qapi/error.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
#include "qemu/error-report.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/vhost-user-fs.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"

static const int user_feature_bits[] = {
    VIRTIO_F_VERSION_1,
    VIRTIO_RING_F_INDIRECT_DESC,
    VIRTIO_RING_F_EVENT_IDX,
    VIRTIO_F_NOTIFY_ON_EMPTY,
    VIRTIO_F_RING_PACKED,
    VIRTIO_F_IOMMU_PLATFORM,

    VHOST_INVALID_FEATURE_BIT
};

static void vuf_get_config(VirtIODevice *vdev, uint8_t *config)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);
    struct virtio_fs_config fscfg = {};

    memcpy((char *)fscfg.tag, fs->conf.tag,
           MIN(strlen(fs->conf.tag) + 1, sizeof(fscfg.tag)));

    virtio_stl_p(vdev, &fscfg.num_request_queues, fs->conf.num_request_queues);

    memcpy(config, &fscfg, sizeof(fscfg));
}

static void vuf_start(VirtIODevice *vdev)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    int ret;
    int i;

    if (!k->set_guest_notifiers) {
        error_report("binding does not support guest notifiers");
        return;
    }

    ret = vhost_dev_enable_notifiers(&fs->vhost_dev, vdev);
    if (ret < 0) {
        error_report("Error enabling host notifiers: %d", -ret);
        return;
    }

    ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, true);
    if (ret < 0) {
        error_report("Error binding guest notifier: %d", -ret);
        goto err_host_notifiers;
    }

    fs->vhost_dev.acked_features = vdev->guest_features;
    ret = vhost_dev_start(&fs->vhost_dev, vdev);
    if (ret < 0) {
        error_report("Error starting vhost: %d", -ret);
        goto err_guest_notifiers;
    }

    /*
     * guest_notifier_mask/pending not used yet, so just unmask
     * everything here.  virtio-pci will do the right thing by
     * enabling/disabling irqfd.
     */
    for (i = 0; i < fs->vhost_dev.nvqs; i++) {
        vhost_virtqueue_mask(&fs->vhost_dev, vdev, i, false);
    }

    return;

err_guest_notifiers:
    k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
err_host_notifiers:
    vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
}

static void vuf_stop(VirtIODevice *vdev)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    int ret;

    if (!k->set_guest_notifiers) {
        return;
    }

    vhost_dev_stop(&fs->vhost_dev, vdev);

    ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
    if (ret < 0) {
        error_report("vhost guest notifier cleanup failed: %d", ret);
        return;
    }

    vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
}

static void vuf_set_status(VirtIODevice *vdev, uint8_t status)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);
    bool should_start = virtio_device_started(vdev, status);

    if (vhost_dev_is_started(&fs->vhost_dev) == should_start) {
        return;
    }

    if (should_start) {
        vuf_start(vdev);
    } else {
        vuf_stop(vdev);
    }
}

static uint64_t vuf_get_features(VirtIODevice *vdev,
                                 uint64_t features,
                                 Error **errp)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);

    return vhost_get_features(&fs->vhost_dev, user_feature_bits, features);
}

static void vuf_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
    /*
     * Not normally called; it's the daemon that handles the queue;
     * however virtio's cleanup path can call this.
     */
}

static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx,
                                            bool mask)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);

    vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask);
}

static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);

    return vhost_virtqueue_pending(&fs->vhost_dev, idx);
}

static void vuf_device_realize(DeviceState *dev, Error **errp)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VHostUserFS *fs = VHOST_USER_FS(dev);
    unsigned int i;
    size_t len;
    int ret;

    if (!fs->conf.chardev.chr) {
        error_setg(errp, "missing chardev");
        return;
    }

    if (!fs->conf.tag) {
        error_setg(errp, "missing tag property");
        return;
    }
    len = strlen(fs->conf.tag);
    if (len == 0) {
        error_setg(errp, "tag property cannot be empty");
        return;
    }
    if (len > sizeof_field(struct virtio_fs_config, tag)) {
        error_setg(errp, "tag property must be %zu bytes or less",
                   sizeof_field(struct virtio_fs_config, tag));
        return;
    }

    if (fs->conf.num_request_queues == 0) {
        error_setg(errp, "num-request-queues property must be larger than 0");
        return;
    }

    if (!is_power_of_2(fs->conf.queue_size)) {
        error_setg(errp, "queue-size property must be a power of 2");
        return;
    }

    if (fs->conf.queue_size > VIRTQUEUE_MAX_SIZE) {
        error_setg(errp, "queue-size property must be %u or smaller",
                   VIRTQUEUE_MAX_SIZE);
        return;
    }

    if (!vhost_user_init(&fs->vhost_user, &fs->conf.chardev, errp)) {
        return;
    }

    virtio_init(vdev, VIRTIO_ID_FS, sizeof(struct virtio_fs_config));

    /* Hiprio queue */
    fs->hiprio_vq = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);

    /* Request queues */
    fs->req_vqs = g_new(VirtQueue *, fs->conf.num_request_queues);
    for (i = 0; i < fs->conf.num_request_queues; i++) {
        fs->req_vqs[i] = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
    }

    /* 1 high prio queue, plus the number configured */
    fs->vhost_dev.nvqs = 1 + fs->conf.num_request_queues;
    fs->vhost_dev.vqs = g_new0(struct vhost_virtqueue, fs->vhost_dev.nvqs);
    ret = vhost_dev_init(&fs->vhost_dev, &fs->vhost_user,
                         VHOST_BACKEND_TYPE_USER, 0, errp);
    if (ret < 0) {
        goto err_virtio;
    }

    return;

err_virtio:
    vhost_user_cleanup(&fs->vhost_user);
    virtio_delete_queue(fs->hiprio_vq);
    for (i = 0; i < fs->conf.num_request_queues; i++) {
        virtio_delete_queue(fs->req_vqs[i]);
    }
    g_free(fs->req_vqs);
    virtio_cleanup(vdev);
    g_free(fs->vhost_dev.vqs);
    return;
}

static void vuf_device_unrealize(DeviceState *dev)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VHostUserFS *fs = VHOST_USER_FS(dev);
    int i;

    /* This will stop vhost backend if appropriate. */
    vuf_set_status(vdev, 0);

    vhost_dev_cleanup(&fs->vhost_dev);

    vhost_user_cleanup(&fs->vhost_user);

    virtio_delete_queue(fs->hiprio_vq);
    for (i = 0; i < fs->conf.num_request_queues; i++) {
        virtio_delete_queue(fs->req_vqs[i]);
    }
    g_free(fs->req_vqs);
    virtio_cleanup(vdev);
    g_free(fs->vhost_dev.vqs);
    fs->vhost_dev.vqs = NULL;
}

static struct vhost_dev *vuf_get_vhost(VirtIODevice *vdev)
{
    VHostUserFS *fs = VHOST_USER_FS(vdev);
    return &fs->vhost_dev;
}

static const VMStateDescription vuf_vmstate = {
    .name = "vhost-user-fs",
    .unmigratable = 1,
};

static Property vuf_properties[] = {
    DEFINE_PROP_CHR("chardev", VHostUserFS, conf.chardev),
    DEFINE_PROP_STRING("tag", VHostUserFS, conf.tag),
    DEFINE_PROP_UINT16("num-request-queues", VHostUserFS,
                       conf.num_request_queues, 1),
    DEFINE_PROP_UINT16("queue-size", VHostUserFS, conf.queue_size, 128),
    DEFINE_PROP_END_OF_LIST(),
};

static void vuf_instance_init(Object *obj)
{
    VHostUserFS *fs = VHOST_USER_FS(obj);

    device_add_bootindex_property(obj, &fs->bootindex, "bootindex",
                                  "/filesystem@0", DEVICE(obj));
}

static void vuf_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);

    device_class_set_props(dc, vuf_properties);
    dc->vmsd = &vuf_vmstate;
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
    vdc->realize = vuf_device_realize;
    vdc->unrealize = vuf_device_unrealize;
    vdc->get_features = vuf_get_features;
    vdc->get_config = vuf_get_config;
    vdc->set_status = vuf_set_status;
    vdc->guest_notifier_mask = vuf_guest_notifier_mask;
    vdc->guest_notifier_pending = vuf_guest_notifier_pending;
    vdc->get_vhost = vuf_get_vhost;
}

static const TypeInfo vuf_info = {
    .name = TYPE_VHOST_USER_FS,
    .parent = TYPE_VIRTIO_DEVICE,
    .instance_size = sizeof(VHostUserFS),
    .instance_init = vuf_instance_init,
    .class_init = vuf_class_init,
};

static void vuf_register_types(void)
{
    type_register_static(&vuf_info);
}

type_init(vuf_register_types)
Commit	Line	Data
98fc1ada DDAG	1	/*
	2	* Vhost-user filesystem virtio device
	3	*
	4	* Copyright 2018-2019 Red Hat, Inc.
	5	*
	6	* Authors:
	7	* Stefan Hajnoczi <stefanha@redhat.com>
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or
	10	* (at your option) any later version. See the COPYING file in the
	11	* top-level directory.
	12	*/
	13
	14	#include "qemu/osdep.h"
	15	#include <sys/ioctl.h>
	16	#include "standard-headers/linux/virtio_fs.h"
	17	#include "qapi/error.h"
	18	#include "hw/qdev-properties.h"
ce35e229	19	#include "hw/qdev-properties-system.h"
98fc1ada DDAG	20	#include "hw/virtio/virtio-bus.h"
	21	#include "hw/virtio/virtio-access.h"
	22	#include "qemu/error-report.h"
b8f3e6a1	23	#include "hw/virtio/vhost.h"
98fc1ada DDAG	24	#include "hw/virtio/vhost-user-fs.h"
98fc1ada DDAG	25	#include "monitor/monitor.h"
6da32fe5	26	#include "sysemu/sysemu.h"
98fc1ada	27
ace66791 AK	28	static const int user_feature_bits[] = {
	29	VIRTIO_F_VERSION_1,
	30	VIRTIO_RING_F_INDIRECT_DESC,
	31	VIRTIO_RING_F_EVENT_IDX,
	32	VIRTIO_F_NOTIFY_ON_EMPTY,
	33	VIRTIO_F_RING_PACKED,
	34	VIRTIO_F_IOMMU_PLATFORM,
	35
	36	VHOST_INVALID_FEATURE_BIT
	37	};
	38
98fc1ada DDAG	39	static void vuf_get_config(VirtIODevice vdev, uint8_t config)
	40	{
	41	VHostUserFS *fs = VHOST_USER_FS(vdev);
	42	struct virtio_fs_config fscfg = {};
	43
	44	memcpy((char *)fscfg.tag, fs->conf.tag,
	45	MIN(strlen(fs->conf.tag) + 1, sizeof(fscfg.tag)));
	46
	47	virtio_stl_p(vdev, &fscfg.num_request_queues, fs->conf.num_request_queues);
	48
	49	memcpy(config, &fscfg, sizeof(fscfg));
	50	}
	51
	52	static void vuf_start(VirtIODevice *vdev)
	53	{
	54	VHostUserFS *fs = VHOST_USER_FS(vdev);
	55	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
	56	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
	57	int ret;
	58	int i;
	59
	60	if (!k->set_guest_notifiers) {
	61	error_report("binding does not support guest notifiers");
	62	return;
	63	}
	64
	65	ret = vhost_dev_enable_notifiers(&fs->vhost_dev, vdev);
	66	if (ret < 0) {
	67	error_report("Error enabling host notifiers: %d", -ret);
	68	return;
	69	}
	70
	71	ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, true);
	72	if (ret < 0) {
	73	error_report("Error binding guest notifier: %d", -ret);
	74	goto err_host_notifiers;
	75	}
	76
	77	fs->vhost_dev.acked_features = vdev->guest_features;
	78	ret = vhost_dev_start(&fs->vhost_dev, vdev);
	79	if (ret < 0) {
	80	error_report("Error starting vhost: %d", -ret);
	81	goto err_guest_notifiers;
	82	}
	83
	84	/*
	85	* guest_notifier_mask/pending not used yet, so just unmask
	86	* everything here. virtio-pci will do the right thing by
	87	* enabling/disabling irqfd.
	88	*/
	89	for (i = 0; i < fs->vhost_dev.nvqs; i++) {
	90	vhost_virtqueue_mask(&fs->vhost_dev, vdev, i, false);
	91	}
	92
	93	return;
	94
	95	err_guest_notifiers:
	96	k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
	97	err_host_notifiers:
	98	vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
	99	}
	100
	101	static void vuf_stop(VirtIODevice *vdev)
	102	{
103	VHostUserFS *fs = VHOST_USER_FS(vdev);
104	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
105	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
106	int ret;
107
108	if (!k->set_guest_notifiers) {
109	return;
110	}
111
112	vhost_dev_stop(&fs->vhost_dev, vdev);
113
114	ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
115	if (ret < 0) {
116	error_report("vhost guest notifier cleanup failed: %d", ret);
117	return;
118	}
119
120	vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
121	}
122
123	static void vuf_set_status(VirtIODevice *vdev, uint8_t status)
124	{
125	VHostUserFS *fs = VHOST_USER_FS(vdev);
9f6bcfd9	126	bool should_start = virtio_device_started(vdev, status);
98fc1ada	127
b8f3e6a1	128	if (vhost_dev_is_started(&fs->vhost_dev) == should_start) {
98fc1ada DDAG	129	return;
	130	}
	131
	132	if (should_start) {
	133	vuf_start(vdev);
	134	} else {
	135	vuf_stop(vdev);
	136	}
	137	}
	138
	139	static uint64_t vuf_get_features(VirtIODevice *vdev,
ace66791 AK	140	uint64_t features,
ace66791 AK	141	Error **errp)
98fc1ada	142	{
ace66791 AK	143	VHostUserFS *fs = VHOST_USER_FS(vdev);
	144
	145	return vhost_get_features(&fs->vhost_dev, user_feature_bits, features);
98fc1ada DDAG	146	}
	147
	148	static void vuf_handle_output(VirtIODevice vdev, VirtQueue vq)
	149	{
	150	/*
	151	* Not normally called; it's the daemon that handles the queue;
	152	* however virtio's cleanup path can call this.
	153	*/
	154	}
	155
	156	static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx,
	157	bool mask)
	158	{
	159	VHostUserFS *fs = VHOST_USER_FS(vdev);
	160
	161	vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask);
	162	}
	163
	164	static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx)
	165	{
	166	VHostUserFS *fs = VHOST_USER_FS(vdev);
	167
	168	return vhost_virtqueue_pending(&fs->vhost_dev, idx);
	169	}
	170
	171	static void vuf_device_realize(DeviceState dev, Error *errp)
	172	{
	173	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
	174	VHostUserFS *fs = VHOST_USER_FS(dev);
	175	unsigned int i;
	176	size_t len;
	177	int ret;
	178
	179	if (!fs->conf.chardev.chr) {
	180	error_setg(errp, "missing chardev");
	181	return;
	182	}
	183
	184	if (!fs->conf.tag) {
	185	error_setg(errp, "missing tag property");
	186	return;
	187	}
	188	len = strlen(fs->conf.tag);
	189	if (len == 0) {
	190	error_setg(errp, "tag property cannot be empty");
	191	return;
	192	}
	193	if (len > sizeof_field(struct virtio_fs_config, tag)) {
	194	error_setg(errp, "tag property must be %zu bytes or less",
	195	sizeof_field(struct virtio_fs_config, tag));
	196	return;
	197	}
	198
	199	if (fs->conf.num_request_queues == 0) {
	200	error_setg(errp, "num-request-queues property must be larger than 0");
	201	return;
	202	}
	203
	204	if (!is_power_of_2(fs->conf.queue_size)) {
	205	error_setg(errp, "queue-size property must be a power of 2");
	206	return;
	207	}
	208
	209	if (fs->conf.queue_size > VIRTQUEUE_MAX_SIZE) {
210	error_setg(errp, "queue-size property must be %u or smaller",
211	VIRTQUEUE_MAX_SIZE);
212	return;
213	}
214
215	if (!vhost_user_init(&fs->vhost_user, &fs->conf.chardev, errp)) {
216	return;
217	}
218
3857cd5c	219	virtio_init(vdev, VIRTIO_ID_FS, sizeof(struct virtio_fs_config));
98fc1ada DDAG	220
98fc1ada DDAG	221	/* Hiprio queue */
2e5bc659	222	fs->hiprio_vq = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
98fc1ada DDAG	223
98fc1ada DDAG	224	/* Request queues */
2e5bc659	225	fs->req_vqs = g_new(VirtQueue *, fs->conf.num_request_queues);
98fc1ada	226	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	227	fs->req_vqs[i] = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
98fc1ada DDAG	228	}
	229
	230	/* 1 high prio queue, plus the number configured */
	231	fs->vhost_dev.nvqs = 1 + fs->conf.num_request_queues;
	232	fs->vhost_dev.vqs = g_new0(struct vhost_virtqueue, fs->vhost_dev.nvqs);
	233	ret = vhost_dev_init(&fs->vhost_dev, &fs->vhost_user,
a6945f22	234	VHOST_BACKEND_TYPE_USER, 0, errp);
98fc1ada	235	if (ret < 0) {
98fc1ada DDAG	236	goto err_virtio;
	237	}
	238
	239	return;
	240
	241	err_virtio:
	242	vhost_user_cleanup(&fs->vhost_user);
2e5bc659	243	virtio_delete_queue(fs->hiprio_vq);
ba07cf5d	244	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	245	virtio_delete_queue(fs->req_vqs[i]);
ba07cf5d	246	}
2e5bc659	247	g_free(fs->req_vqs);
98fc1ada DDAG	248	virtio_cleanup(vdev);
	249	g_free(fs->vhost_dev.vqs);
	250	return;
	251	}
	252
b69c3c21	253	static void vuf_device_unrealize(DeviceState *dev)
98fc1ada DDAG	254	{
	255	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
	256	VHostUserFS *fs = VHOST_USER_FS(dev);
ba07cf5d	257	int i;
98fc1ada DDAG	258
	259	/* This will stop vhost backend if appropriate. */
	260	vuf_set_status(vdev, 0);
	261
	262	vhost_dev_cleanup(&fs->vhost_dev);
	263
	264	vhost_user_cleanup(&fs->vhost_user);
	265
2e5bc659	266	virtio_delete_queue(fs->hiprio_vq);
ba07cf5d	267	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	268	virtio_delete_queue(fs->req_vqs[i]);
ba07cf5d	269	}
2e5bc659	270	g_free(fs->req_vqs);
98fc1ada DDAG	271	virtio_cleanup(vdev);
	272	g_free(fs->vhost_dev.vqs);
	273	fs->vhost_dev.vqs = NULL;
	274	}
	275
c255488d JP	276	static struct vhost_dev vuf_get_vhost(VirtIODevice vdev)
	277	{
	278	VHostUserFS *fs = VHOST_USER_FS(vdev);
	279	return &fs->vhost_dev;
	280	}
	281
98fc1ada DDAG	282	static const VMStateDescription vuf_vmstate = {
	283	.name = "vhost-user-fs",
	284	.unmigratable = 1,
	285	};
	286
	287	static Property vuf_properties[] = {
	288	DEFINE_PROP_CHR("chardev", VHostUserFS, conf.chardev),
	289	DEFINE_PROP_STRING("tag", VHostUserFS, conf.tag),
	290	DEFINE_PROP_UINT16("num-request-queues", VHostUserFS,
	291	conf.num_request_queues, 1),
	292	DEFINE_PROP_UINT16("queue-size", VHostUserFS, conf.queue_size, 128),
98fc1ada DDAG	293	DEFINE_PROP_END_OF_LIST(),
	294	};
	295
6da32fe5 LE	296	static void vuf_instance_init(Object *obj)
	297	{
	298	VHostUserFS *fs = VHOST_USER_FS(obj);
	299
	300	device_add_bootindex_property(obj, &fs->bootindex, "bootindex",
	301	"/filesystem@0", DEVICE(obj));
	302	}
	303
98fc1ada DDAG	304	static void vuf_class_init(ObjectClass klass, void data)
	305	{
	306	DeviceClass *dc = DEVICE_CLASS(klass);
	307	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
	308
4f67d30b	309	device_class_set_props(dc, vuf_properties);
98fc1ada DDAG	310	dc->vmsd = &vuf_vmstate;
	311	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
	312	vdc->realize = vuf_device_realize;
	313	vdc->unrealize = vuf_device_unrealize;
	314	vdc->get_features = vuf_get_features;
	315	vdc->get_config = vuf_get_config;
	316	vdc->set_status = vuf_set_status;
	317	vdc->guest_notifier_mask = vuf_guest_notifier_mask;
	318	vdc->guest_notifier_pending = vuf_guest_notifier_pending;
c255488d	319	vdc->get_vhost = vuf_get_vhost;
98fc1ada DDAG	320	}
	321
	322	static const TypeInfo vuf_info = {
	323	.name = TYPE_VHOST_USER_FS,
	324	.parent = TYPE_VIRTIO_DEVICE,
	325	.instance_size = sizeof(VHostUserFS),
6da32fe5	326	.instance_init = vuf_instance_init,
98fc1ada DDAG	327	.class_init = vuf_class_init,
	328	};
	329
	330	static void vuf_register_types(void)
	331	{
	332	type_register_static(&vuf_info);
	333	}
	334
	335	type_init(vuf_register_types)