[mirror_qemu.git] / hw / scsi / vhost-scsi.c

/*
 * vhost_scsi host device
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Stefan Hajnoczi   <stefanha@linux.vnet.ibm.com>
 *
 * Changes for QEMU mainline + tcm_vhost kernel upstream:
 *  Nicholas Bellinger <nab@risingtidesystems.com>
 *
 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
 * See the COPYING.LIB file in the top-level directory.
 *
 */

#include <sys/ioctl.h>
#include "config.h"
#include "qemu/queue.h"
#include "monitor/monitor.h"
#include "migration/migration.h"
#include "hw/virtio/vhost-scsi.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/virtio-scsi.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"

/* Features supported by host kernel. */
static const int kernel_feature_bits[] = {
    VIRTIO_F_NOTIFY_ON_EMPTY,
    VIRTIO_RING_F_INDIRECT_DESC,
    VIRTIO_RING_F_EVENT_IDX,
    VIRTIO_SCSI_F_HOTPLUG,
    VHOST_INVALID_FEATURE_BIT
};

static int vhost_scsi_set_endpoint(VHostSCSI *s)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
    const VhostOps *vhost_ops = s->dev.vhost_ops;
    struct vhost_scsi_target backend;
    int ret;

    memset(&backend, 0, sizeof(backend));
    pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
    ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT, &backend);
    if (ret < 0) {
        return -errno;
    }
    return 0;
}

static void vhost_scsi_clear_endpoint(VHostSCSI *s)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
    struct vhost_scsi_target backend;
    const VhostOps *vhost_ops = s->dev.vhost_ops;

    memset(&backend, 0, sizeof(backend));
    pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
    vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
}

static int vhost_scsi_start(VHostSCSI *s)
{
    int ret, abi_version, i;
    VirtIODevice *vdev = VIRTIO_DEVICE(s);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    const VhostOps *vhost_ops = s->dev.vhost_ops;

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

    ret = vhost_ops->vhost_call(&s->dev,
                                VHOST_SCSI_GET_ABI_VERSION, &abi_version);
    if (ret < 0) {
        return -errno;
    }
    if (abi_version > VHOST_SCSI_ABI_VERSION) {
        error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
                     " %d is greater than vhost_scsi userspace supports: %d, please"
                     " upgrade your version of QEMU\n", abi_version,
                     VHOST_SCSI_ABI_VERSION);
        return -ENOSYS;
    }

    ret = vhost_dev_enable_notifiers(&s->dev, vdev);
    if (ret < 0) {
        return ret;
    }

    s->dev.acked_features = vdev->guest_features;
    ret = vhost_dev_start(&s->dev, vdev);
    if (ret < 0) {
        error_report("Error start vhost dev");
        goto err_notifiers;
    }

    ret = vhost_scsi_set_endpoint(s);
    if (ret < 0) {
        error_report("Error set vhost-scsi endpoint");
        goto err_vhost_stop;
    }

    ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
    if (ret < 0) {
        error_report("Error binding guest notifier");
        goto err_endpoint;
    }

    /* 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 < s->dev.nvqs; i++) {
        vhost_virtqueue_mask(&s->dev, vdev, i, false);
    }

    return ret;

err_endpoint:
    vhost_scsi_clear_endpoint(s);
err_vhost_stop:
    vhost_dev_stop(&s->dev, vdev);
err_notifiers:
    vhost_dev_disable_notifiers(&s->dev, vdev);
    return ret;
}

static void vhost_scsi_stop(VHostSCSI *s)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(s);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    int ret = 0;

    if (k->set_guest_notifiers) {
        ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
        if (ret < 0) {
                error_report("vhost guest notifier cleanup failed: %d\n", ret);
        }
    }
    assert(ret >= 0);

    vhost_scsi_clear_endpoint(s);
    vhost_dev_stop(&s->dev, vdev);
    vhost_dev_disable_notifiers(&s->dev, vdev);
}

static uint32_t vhost_scsi_get_features(VirtIODevice *vdev,
                                        uint32_t features)
{
    VHostSCSI *s = VHOST_SCSI(vdev);

    return vhost_get_features(&s->dev, kernel_feature_bits, features);
}

static void vhost_scsi_set_config(VirtIODevice *vdev,
                                  const uint8_t *config)
{
    VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);

    if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size ||
        (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
        error_report("vhost-scsi does not support changing the sense data and CDB sizes");
        exit(1);
    }
}

static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
{
    VHostSCSI *s = (VHostSCSI *)vdev;
    bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);

    if (s->dev.started == start) {
        return;
    }

    if (start) {
        int ret;

        ret = vhost_scsi_start(s);
        if (ret < 0) {
            error_report("virtio-scsi: unable to start vhost: %s\n",
                         strerror(-ret));

            /* There is no userspace virtio-scsi fallback so exit */
            exit(1);
        }
    } else {
        vhost_scsi_stop(s);
    }
}

static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
}

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_handle_fd_param(cur_mon, vs->conf.vhostfd);
        if (vhostfd == -1) {
            error_setg(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, true);
    if (ret < 0) {
        error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
                   strerror(-ret));
        return;
    }

    error_setg(&s->migration_blocker,
            "vhost-scsi does not support migration");
    migrate_add_blocker(s->migration_blocker);
}

static void vhost_scsi_unrealize(DeviceState *dev, Error **errp)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VHostSCSI *s = VHOST_SCSI(dev);

    migrate_del_blocker(s->migration_blocker);
    error_free(s->migration_blocker);

    /* This will stop vhost backend. */
    vhost_scsi_set_status(vdev, 0);

    g_free(s->dev.vqs);

    virtio_scsi_common_unrealize(dev, errp);
}

static Property vhost_scsi_properties[] = {
    DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSI, parent_obj.conf),
    DEFINE_PROP_END_OF_LIST(),
};

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

    dc->props = vhost_scsi_properties;
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
    vdc->realize = vhost_scsi_realize;
    vdc->unrealize = vhost_scsi_unrealize;
    vdc->get_features = vhost_scsi_get_features;
    vdc->set_config = vhost_scsi_set_config;
    vdc->set_status = vhost_scsi_set_status;
}

static void vhost_scsi_instance_init(Object *obj)
{
    VHostSCSI *dev = VHOST_SCSI(obj);

    device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
                                  DEVICE(dev), NULL);
}

static const TypeInfo vhost_scsi_info = {
    .name = TYPE_VHOST_SCSI,
    .parent = TYPE_VIRTIO_SCSI_COMMON,
    .instance_size = sizeof(VHostSCSI),
    .class_init = vhost_scsi_class_init,
    .instance_init = vhost_scsi_instance_init,
};

static void virtio_register_types(void)
{
    type_register_static(&vhost_scsi_info);
}

type_init(virtio_register_types)
Commit	Line	Data
5e9be92d NB	1	/*
	2	* vhost_scsi host device
	3	*
	4	* Copyright IBM, Corp. 2011
	5	*
	6	* Authors:
	7	* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
	8	*
	9	* Changes for QEMU mainline + tcm_vhost kernel upstream:
	10	* Nicholas Bellinger <nab@risingtidesystems.com>
	11	*
	12	* This work is licensed under the terms of the GNU LGPL, version 2 or later.
	13	* See the COPYING.LIB file in the top-level directory.
	14	*
	15	*/
	16
	17	#include <sys/ioctl.h>
	18	#include "config.h"
	19	#include "qemu/queue.h"
	20	#include "monitor/monitor.h"
	21	#include "migration/migration.h"
	22	#include "hw/virtio/vhost-scsi.h"
	23	#include "hw/virtio/vhost.h"
	24	#include "hw/virtio/virtio-scsi.h"
1c819449	25	#include "hw/virtio/virtio-bus.h"
7ce04255	26	#include "hw/virtio/virtio-access.h"
5e9be92d	27
2e6d46d7 NN	28	/* Features supported by host kernel. */
	29	static const int kernel_feature_bits[] = {
	30	VIRTIO_F_NOTIFY_ON_EMPTY,
	31	VIRTIO_RING_F_INDIRECT_DESC,
	32	VIRTIO_RING_F_EVENT_IDX,
	33	VIRTIO_SCSI_F_HOTPLUG,
	34	VHOST_INVALID_FEATURE_BIT
	35	};
	36
5e9be92d NB	37	static int vhost_scsi_set_endpoint(VHostSCSI *s)
	38	{
	39	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
24d1eb33	40	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	41	struct vhost_scsi_target backend;
	42	int ret;
	43
	44	memset(&backend, 0, sizeof(backend));
	45	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	46	ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT, &backend);
5e9be92d NB	47	if (ret < 0) {
	48	return -errno;
	49	}
	50	return 0;
	51	}
	52
	53	static void vhost_scsi_clear_endpoint(VHostSCSI *s)
	54	{
	55	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
	56	struct vhost_scsi_target backend;
24d1eb33	57	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	58
	59	memset(&backend, 0, sizeof(backend));
	60	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	61	vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
5e9be92d NB	62	}
	63
	64	static int vhost_scsi_start(VHostSCSI *s)
	65	{
	66	int ret, abi_version, i;
	67	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	68	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	69	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
24d1eb33	70	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d	71
1c819449	72	if (!k->set_guest_notifiers) {
5e9be92d NB	73	error_report("binding does not support guest notifiers");
	74	return -ENOSYS;
	75	}
	76
24d1eb33 NN	77	ret = vhost_ops->vhost_call(&s->dev,
24d1eb33 NN	78	VHOST_SCSI_GET_ABI_VERSION, &abi_version);
5e9be92d NB	79	if (ret < 0) {
	80	return -errno;
	81	}
	82	if (abi_version > VHOST_SCSI_ABI_VERSION) {
	83	error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
	84	" %d is greater than vhost_scsi userspace supports: %d, please"
	85	" upgrade your version of QEMU\n", abi_version,
	86	VHOST_SCSI_ABI_VERSION);
	87	return -ENOSYS;
	88	}
	89
	90	ret = vhost_dev_enable_notifiers(&s->dev, vdev);
	91	if (ret < 0) {
	92	return ret;
	93	}
	94
	95	s->dev.acked_features = vdev->guest_features;
	96	ret = vhost_dev_start(&s->dev, vdev);
	97	if (ret < 0) {
	98	error_report("Error start vhost dev");
	99	goto err_notifiers;
	100	}
	101
	102	ret = vhost_scsi_set_endpoint(s);
	103	if (ret < 0) {
	104	error_report("Error set vhost-scsi endpoint");
	105	goto err_vhost_stop;
	106	}
	107
1c819449	108	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
5e9be92d NB	109	if (ret < 0) {
	110	error_report("Error binding guest notifier");
	111	goto err_endpoint;
	112	}
	113
	114	/* guest_notifier_mask/pending not used yet, so just unmask
	115	* everything here. virtio-pci will do the right thing by
	116	* enabling/disabling irqfd.
	117	*/
	118	for (i = 0; i < s->dev.nvqs; i++) {
	119	vhost_virtqueue_mask(&s->dev, vdev, i, false);
	120	}
	121
	122	return ret;
	123
	124	err_endpoint:
	125	vhost_scsi_clear_endpoint(s);
	126	err_vhost_stop:
	127	vhost_dev_stop(&s->dev, vdev);
	128	err_notifiers:
	129	vhost_dev_disable_notifiers(&s->dev, vdev);
	130	return ret;
	131	}
	132
	133	static void vhost_scsi_stop(VHostSCSI *s)
	134	{
	135	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	136	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	137	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
5e9be92d NB	138	int ret = 0;
5e9be92d NB	139
0e22a2d1	140	if (k->set_guest_notifiers) {
1c819449	141	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
5e9be92d NB	142	if (ret < 0) {
	143	error_report("vhost guest notifier cleanup failed: %d\n", ret);
	144	}
	145	}
	146	assert(ret >= 0);
	147
	148	vhost_scsi_clear_endpoint(s);
	149	vhost_dev_stop(&s->dev, vdev);
	150	vhost_dev_disable_notifiers(&s->dev, vdev);
	151	}
	152
	153	static uint32_t vhost_scsi_get_features(VirtIODevice *vdev,
	154	uint32_t features)
	155	{
	156	VHostSCSI *s = VHOST_SCSI(vdev);
	157
2e6d46d7	158	return vhost_get_features(&s->dev, kernel_feature_bits, features);
5e9be92d NB	159	}
	160
	161	static void vhost_scsi_set_config(VirtIODevice *vdev,
	162	const uint8_t *config)
	163	{
	164	VirtIOSCSIConfig scsiconf = (VirtIOSCSIConfig )config;
	165	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
	166
7ce04255 PB	167	if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size \|\|
7ce04255 PB	168	(uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
5e9be92d NB	169	error_report("vhost-scsi does not support changing the sense data and CDB sizes");
	170	exit(1);
	171	}
	172	}
	173
	174	static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
	175	{
	176	VHostSCSI s = (VHostSCSI )vdev;
	177	bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);
	178
	179	if (s->dev.started == start) {
	180	return;
	181	}
	182
	183	if (start) {
	184	int ret;
	185
	186	ret = vhost_scsi_start(s);
	187	if (ret < 0) {
	188	error_report("virtio-scsi: unable to start vhost: %s\n",
	189	strerror(-ret));
	190
	191	/* There is no userspace virtio-scsi fallback so exit */
	192	exit(1);
	193	}
	194	} else {
	195	vhost_scsi_stop(s);
	196	}
	197	}
	198
91d670fb ML	199	static void vhost_dummy_handle_output(VirtIODevice vdev, VirtQueue vq)
	200	{
	201	}
	202
71a6520b	203	static void vhost_scsi_realize(DeviceState dev, Error *errp)
5e9be92d	204	{
71a6520b AF	205	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
	206	VHostSCSI *s = VHOST_SCSI(dev);
	207	Error *err = NULL;
5e9be92d NB	208	int vhostfd = -1;
	209	int ret;
	210
	211	if (!vs->conf.wwpn) {
71a6520b AF	212	error_setg(errp, "vhost-scsi: missing wwpn");
71a6520b AF	213	return;
5e9be92d NB	214	}
	215
	216	if (vs->conf.vhostfd) {
	217	vhostfd = monitor_handle_fd_param(cur_mon, vs->conf.vhostfd);
	218	if (vhostfd == -1) {
71a6520b AF	219	error_setg(errp, "vhost-scsi: unable to parse vhostfd");
71a6520b AF	220	return;
5e9be92d	221	}
81647a65 NN	222	} else {
	223	vhostfd = open("/dev/vhost-scsi", O_RDWR);
	224	if (vhostfd < 0) {
	225	error_setg(errp, "vhost-scsi: open vhost char device failed: %s",
	226	strerror(errno));
	227	return;
	228	}
5e9be92d NB	229	}
5e9be92d NB	230
91d670fb ML	231	virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output,
	232	vhost_dummy_handle_output,
	233	vhost_dummy_handle_output);
71a6520b AF	234	if (err != NULL) {
71a6520b AF	235	error_propagate(errp, err);
b19ca188	236	close(vhostfd);
71a6520b	237	return;
5e9be92d NB	238	}
5e9be92d NB	239
5e9be92d NB	240	s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
	241	s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
	242	s->dev.vq_index = 0;
3a1655fc	243	s->dev.backend_features = 0;
5e9be92d	244
81647a65	245	ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
1a1bfac9	246	VHOST_BACKEND_TYPE_KERNEL, true);
5e9be92d	247	if (ret < 0) {
71a6520b AF	248	error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
	249	strerror(-ret));
	250	return;
5e9be92d	251	}
5e9be92d NB	252
	253	error_setg(&s->migration_blocker,
	254	"vhost-scsi does not support migration");
	255	migrate_add_blocker(s->migration_blocker);
5e9be92d NB	256	}
5e9be92d NB	257
306ec6c3	258	static void vhost_scsi_unrealize(DeviceState dev, Error *errp)
5e9be92d	259	{
306ec6c3 AF	260	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
306ec6c3 AF	261	VHostSCSI *s = VHOST_SCSI(dev);
5e9be92d NB	262
	263	migrate_del_blocker(s->migration_blocker);
	264	error_free(s->migration_blocker);
	265
	266	/* This will stop vhost backend. */
	267	vhost_scsi_set_status(vdev, 0);
	268
	269	g_free(s->dev.vqs);
306ec6c3 AF	270
306ec6c3 AF	271	virtio_scsi_common_unrealize(dev, errp);
5e9be92d NB	272	}
	273
	274	static Property vhost_scsi_properties[] = {
	275	DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSI, parent_obj.conf),
	276	DEFINE_PROP_END_OF_LIST(),
	277	};
	278
	279	static void vhost_scsi_class_init(ObjectClass klass, void data)
	280	{
	281	DeviceClass *dc = DEVICE_CLASS(klass);
	282	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
71a6520b	283
5e9be92d	284	dc->props = vhost_scsi_properties;
125ee0ed	285	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
71a6520b	286	vdc->realize = vhost_scsi_realize;
306ec6c3	287	vdc->unrealize = vhost_scsi_unrealize;
5e9be92d NB	288	vdc->get_features = vhost_scsi_get_features;
	289	vdc->set_config = vhost_scsi_set_config;
	290	vdc->set_status = vhost_scsi_set_status;
	291	}
	292
d4433f32 GA	293	static void vhost_scsi_instance_init(Object *obj)
	294	{
	295	VHostSCSI *dev = VHOST_SCSI(obj);
	296
	297	device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
	298	DEVICE(dev), NULL);
	299	}
	300
5e9be92d NB	301	static const TypeInfo vhost_scsi_info = {
	302	.name = TYPE_VHOST_SCSI,
	303	.parent = TYPE_VIRTIO_SCSI_COMMON,
	304	.instance_size = sizeof(VHostSCSI),
	305	.class_init = vhost_scsi_class_init,
d4433f32	306	.instance_init = vhost_scsi_instance_init,
5e9be92d NB	307	};
	308
	309	static void virtio_register_types(void)
	310	{
	311	type_register_static(&vhost_scsi_info);
	312	}
	313
	314	type_init(virtio_register_types)