[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,
    VIRTIO_F_RING_RESET,

    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, true);
    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, true);

    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_should_start(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);

    /*
     * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
     * as the Marco of configure interrupt's IDX, If this driver does not
     * support, the function will return
     */

    if (idx == VIRTIO_CONFIG_IRQ_IDX) {
        return;
    }
    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);

    /*
     * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
     * as the Marco of configure interrupt's IDX, If this driver does not
     * support, the function will return
     */

    if (idx == VIRTIO_CONFIG_IRQ_IDX) {
        return false;
    }
    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,
562a7d23	35	VIRTIO_F_RING_RESET,
ace66791 AK	36
	37	VHOST_INVALID_FEATURE_BIT
	38	};
	39
98fc1ada DDAG	40	static void vuf_get_config(VirtIODevice vdev, uint8_t config)
	41	{
	42	VHostUserFS *fs = VHOST_USER_FS(vdev);
	43	struct virtio_fs_config fscfg = {};
	44
	45	memcpy((char *)fscfg.tag, fs->conf.tag,
	46	MIN(strlen(fs->conf.tag) + 1, sizeof(fscfg.tag)));
	47
	48	virtio_stl_p(vdev, &fscfg.num_request_queues, fs->conf.num_request_queues);
	49
	50	memcpy(config, &fscfg, sizeof(fscfg));
	51	}
	52
	53	static void vuf_start(VirtIODevice *vdev)
	54	{
	55	VHostUserFS *fs = VHOST_USER_FS(vdev);
	56	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
	57	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
	58	int ret;
	59	int i;
	60
	61	if (!k->set_guest_notifiers) {
	62	error_report("binding does not support guest notifiers");
	63	return;
	64	}
	65
	66	ret = vhost_dev_enable_notifiers(&fs->vhost_dev, vdev);
	67	if (ret < 0) {
	68	error_report("Error enabling host notifiers: %d", -ret);
	69	return;
	70	}
	71
	72	ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, true);
	73	if (ret < 0) {
	74	error_report("Error binding guest notifier: %d", -ret);
	75	goto err_host_notifiers;
	76	}
	77
	78	fs->vhost_dev.acked_features = vdev->guest_features;
4daa5054	79	ret = vhost_dev_start(&fs->vhost_dev, vdev, true);
98fc1ada DDAG	80	if (ret < 0) {
	81	error_report("Error starting vhost: %d", -ret);
	82	goto err_guest_notifiers;
	83	}
	84
	85	/*
	86	* guest_notifier_mask/pending not used yet, so just unmask
	87	* everything here. virtio-pci will do the right thing by
	88	* enabling/disabling irqfd.
	89	*/
	90	for (i = 0; i < fs->vhost_dev.nvqs; i++) {
	91	vhost_virtqueue_mask(&fs->vhost_dev, vdev, i, false);
	92	}
	93
	94	return;
	95
	96	err_guest_notifiers:
	97	k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
	98	err_host_notifiers:
	99	vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
	100	}
	101
	102	static void vuf_stop(VirtIODevice *vdev)
	103	{
	104	VHostUserFS *fs = VHOST_USER_FS(vdev);
	105	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
	106	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
	107	int ret;
	108
	109	if (!k->set_guest_notifiers) {
	110	return;
	111	}
	112
4daa5054	113	vhost_dev_stop(&fs->vhost_dev, vdev, true);
98fc1ada DDAG	114
	115	ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
	116	if (ret < 0) {
	117	error_report("vhost guest notifier cleanup failed: %d", ret);
	118	return;
	119	}
	120
	121	vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
	122	}
	123
	124	static void vuf_set_status(VirtIODevice *vdev, uint8_t status)
	125	{
	126	VHostUserFS *fs = VHOST_USER_FS(vdev);
259d69c0	127	bool should_start = virtio_device_should_start(vdev, status);
98fc1ada	128
b8f3e6a1	129	if (vhost_dev_is_started(&fs->vhost_dev) == should_start) {
98fc1ada DDAG	130	return;
	131	}
	132
	133	if (should_start) {
	134	vuf_start(vdev);
	135	} else {
	136	vuf_stop(vdev);
	137	}
	138	}
	139
	140	static uint64_t vuf_get_features(VirtIODevice *vdev,
ace66791 AK	141	uint64_t features,
ace66791 AK	142	Error **errp)
98fc1ada	143	{
ace66791 AK	144	VHostUserFS *fs = VHOST_USER_FS(vdev);
	145
	146	return vhost_get_features(&fs->vhost_dev, user_feature_bits, features);
98fc1ada DDAG	147	}
	148
	149	static void vuf_handle_output(VirtIODevice vdev, VirtQueue vq)
	150	{
	151	/*
	152	* Not normally called; it's the daemon that handles the queue;
	153	* however virtio's cleanup path can call this.
	154	*/
	155	}
	156
	157	static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx,
	158	bool mask)
	159	{
	160	VHostUserFS *fs = VHOST_USER_FS(vdev);
	161
544f0278 CL	162	/*
	163	* Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
	164	* as the Marco of configure interrupt's IDX, If this driver does not
	165	* support, the function will return
	166	*/
	167
	168	if (idx == VIRTIO_CONFIG_IRQ_IDX) {
	169	return;
	170	}
98fc1ada DDAG	171	vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask);
	172	}
	173
	174	static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx)
	175	{
	176	VHostUserFS *fs = VHOST_USER_FS(vdev);
	177
544f0278 CL	178	/*
	179	* Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
	180	* as the Marco of configure interrupt's IDX, If this driver does not
	181	* support, the function will return
	182	*/
	183
	184	if (idx == VIRTIO_CONFIG_IRQ_IDX) {
	185	return false;
	186	}
98fc1ada DDAG	187	return vhost_virtqueue_pending(&fs->vhost_dev, idx);
	188	}
	189
	190	static void vuf_device_realize(DeviceState dev, Error *errp)
	191	{
	192	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
	193	VHostUserFS *fs = VHOST_USER_FS(dev);
	194	unsigned int i;
	195	size_t len;
	196	int ret;
	197
	198	if (!fs->conf.chardev.chr) {
	199	error_setg(errp, "missing chardev");
	200	return;
	201	}
	202
	203	if (!fs->conf.tag) {
	204	error_setg(errp, "missing tag property");
	205	return;
	206	}
	207	len = strlen(fs->conf.tag);
	208	if (len == 0) {
	209	error_setg(errp, "tag property cannot be empty");
	210	return;
	211	}
	212	if (len > sizeof_field(struct virtio_fs_config, tag)) {
	213	error_setg(errp, "tag property must be %zu bytes or less",
	214	sizeof_field(struct virtio_fs_config, tag));
	215	return;
	216	}
	217
	218	if (fs->conf.num_request_queues == 0) {
	219	error_setg(errp, "num-request-queues property must be larger than 0");
	220	return;
	221	}
	222
	223	if (!is_power_of_2(fs->conf.queue_size)) {
	224	error_setg(errp, "queue-size property must be a power of 2");
	225	return;
	226	}
	227
	228	if (fs->conf.queue_size > VIRTQUEUE_MAX_SIZE) {
	229	error_setg(errp, "queue-size property must be %u or smaller",
	230	VIRTQUEUE_MAX_SIZE);
	231	return;
	232	}
	233
	234	if (!vhost_user_init(&fs->vhost_user, &fs->conf.chardev, errp)) {
	235	return;
	236	}
	237
3857cd5c	238	virtio_init(vdev, VIRTIO_ID_FS, sizeof(struct virtio_fs_config));
98fc1ada DDAG	239
98fc1ada DDAG	240	/* Hiprio queue */
2e5bc659	241	fs->hiprio_vq = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
98fc1ada DDAG	242
98fc1ada DDAG	243	/* Request queues */
2e5bc659	244	fs->req_vqs = g_new(VirtQueue *, fs->conf.num_request_queues);
98fc1ada	245	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	246	fs->req_vqs[i] = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
98fc1ada DDAG	247	}
	248
	249	/* 1 high prio queue, plus the number configured */
	250	fs->vhost_dev.nvqs = 1 + fs->conf.num_request_queues;
	251	fs->vhost_dev.vqs = g_new0(struct vhost_virtqueue, fs->vhost_dev.nvqs);
	252	ret = vhost_dev_init(&fs->vhost_dev, &fs->vhost_user,
a6945f22	253	VHOST_BACKEND_TYPE_USER, 0, errp);
98fc1ada	254	if (ret < 0) {
98fc1ada DDAG	255	goto err_virtio;
	256	}
	257
	258	return;
	259
	260	err_virtio:
	261	vhost_user_cleanup(&fs->vhost_user);
2e5bc659	262	virtio_delete_queue(fs->hiprio_vq);
ba07cf5d	263	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	264	virtio_delete_queue(fs->req_vqs[i]);
ba07cf5d	265	}
2e5bc659	266	g_free(fs->req_vqs);
98fc1ada DDAG	267	virtio_cleanup(vdev);
	268	g_free(fs->vhost_dev.vqs);
	269	return;
	270	}
	271
b69c3c21	272	static void vuf_device_unrealize(DeviceState *dev)
98fc1ada DDAG	273	{
	274	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
	275	VHostUserFS *fs = VHOST_USER_FS(dev);
ba07cf5d	276	int i;
98fc1ada DDAG	277
	278	/* This will stop vhost backend if appropriate. */
	279	vuf_set_status(vdev, 0);
	280
	281	vhost_dev_cleanup(&fs->vhost_dev);
	282
	283	vhost_user_cleanup(&fs->vhost_user);
	284
2e5bc659	285	virtio_delete_queue(fs->hiprio_vq);
ba07cf5d	286	for (i = 0; i < fs->conf.num_request_queues; i++) {
2e5bc659	287	virtio_delete_queue(fs->req_vqs[i]);
ba07cf5d	288	}
2e5bc659	289	g_free(fs->req_vqs);
98fc1ada DDAG	290	virtio_cleanup(vdev);
	291	g_free(fs->vhost_dev.vqs);
	292	fs->vhost_dev.vqs = NULL;
	293	}
	294
c255488d JP	295	static struct vhost_dev vuf_get_vhost(VirtIODevice vdev)
	296	{
	297	VHostUserFS *fs = VHOST_USER_FS(vdev);
	298	return &fs->vhost_dev;
	299	}
	300
98fc1ada DDAG	301	static const VMStateDescription vuf_vmstate = {
	302	.name = "vhost-user-fs",
	303	.unmigratable = 1,
	304	};
	305
	306	static Property vuf_properties[] = {
	307	DEFINE_PROP_CHR("chardev", VHostUserFS, conf.chardev),
	308	DEFINE_PROP_STRING("tag", VHostUserFS, conf.tag),
	309	DEFINE_PROP_UINT16("num-request-queues", VHostUserFS,
	310	conf.num_request_queues, 1),
	311	DEFINE_PROP_UINT16("queue-size", VHostUserFS, conf.queue_size, 128),
98fc1ada DDAG	312	DEFINE_PROP_END_OF_LIST(),
	313	};
	314
6da32fe5 LE	315	static void vuf_instance_init(Object *obj)
	316	{
	317	VHostUserFS *fs = VHOST_USER_FS(obj);
	318
	319	device_add_bootindex_property(obj, &fs->bootindex, "bootindex",
	320	"/filesystem@0", DEVICE(obj));
	321	}
	322
98fc1ada DDAG	323	static void vuf_class_init(ObjectClass klass, void data)
	324	{
	325	DeviceClass *dc = DEVICE_CLASS(klass);
	326	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
	327
4f67d30b	328	device_class_set_props(dc, vuf_properties);
98fc1ada DDAG	329	dc->vmsd = &vuf_vmstate;
	330	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
	331	vdc->realize = vuf_device_realize;
	332	vdc->unrealize = vuf_device_unrealize;
	333	vdc->get_features = vuf_get_features;
	334	vdc->get_config = vuf_get_config;
	335	vdc->set_status = vuf_set_status;
	336	vdc->guest_notifier_mask = vuf_guest_notifier_mask;
	337	vdc->guest_notifier_pending = vuf_guest_notifier_pending;
c255488d	338	vdc->get_vhost = vuf_get_vhost;
98fc1ada DDAG	339	}
	340
	341	static const TypeInfo vuf_info = {
	342	.name = TYPE_VHOST_USER_FS,
	343	.parent = TYPE_VIRTIO_DEVICE,
	344	.instance_size = sizeof(VHostUserFS),
6da32fe5	345	.instance_init = vuf_instance_init,
98fc1ada DDAG	346	.class_init = vuf_class_init,
	347	};
	348
	349	static void vuf_register_types(void)
	350	{
	351	type_register_static(&vuf_info);
	352	}
	353
	354	type_init(vuf_register_types)