hw: move virtio devices to hw/ subdirectories

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 732 insertions, 0 deletions

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
new file mode 100644
index 0000000000..6efb2f063d
--- /dev/null
+++ b/hw/block/virtio-blk.c
@@ -0,0 +1,732 @@
+/*
+ * Virtio Block Device
+ *
+ * Copyright IBM, Corp. 2007
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "trace.h"
+#include "hw/block/block.h"
+#include "sysemu/blockdev.h"
+#include "hw/virtio/virtio-blk.h"
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+# include "dataplane/virtio-blk.h"
+#endif
+#include "block/scsi.h"
+#ifdef __linux__
+# include <scsi/sg.h>
+#endif
+#include "hw/virtio/virtio-bus.h"
+
+typedef struct VirtIOBlockReq
+{
+    VirtIOBlock *dev;
+    VirtQueueElement elem;
+    struct virtio_blk_inhdr *in;
+    struct virtio_blk_outhdr *out;
+    struct virtio_scsi_inhdr *scsi;
+    QEMUIOVector qiov;
+    struct VirtIOBlockReq *next;
+    BlockAcctCookie acct;
+} VirtIOBlockReq;
+
+static void virtio_blk_req_complete(VirtIOBlockReq *req, int status)
+{
+    VirtIOBlock *s = req->dev;
+    VirtIODevice *vdev = VIRTIO_DEVICE(s);
+
+    trace_virtio_blk_req_complete(req, status);
+
+    stb_p(&req->in->status, status);
+    virtqueue_push(s->vq, &req->elem, req->qiov.size + sizeof(*req->in));
+    virtio_notify(vdev, s->vq);
+}
+
+static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error,
+    bool is_read)
+{
+    BlockErrorAction action = bdrv_get_error_action(req->dev->bs, is_read, error);
+    VirtIOBlock *s = req->dev;
+
+    if (action == BDRV_ACTION_STOP) {
+        req->next = s->rq;
+        s->rq = req;
+    } else if (action == BDRV_ACTION_REPORT) {
+        virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
+        bdrv_acct_done(s->bs, &req->acct);
+        g_free(req);
+    }
+
+    bdrv_error_action(s->bs, action, is_read, error);
+    return action != BDRV_ACTION_IGNORE;
+}
+
+static void virtio_blk_rw_complete(void *opaque, int ret)
+{
+    VirtIOBlockReq *req = opaque;
+
+    trace_virtio_blk_rw_complete(req, ret);
+
+    if (ret) {
+        bool is_read = !(ldl_p(&req->out->type) & VIRTIO_BLK_T_OUT);
+        if (virtio_blk_handle_rw_error(req, -ret, is_read))
+            return;
+    }
+
+    virtio_blk_req_complete(req, VIRTIO_BLK_S_OK);
+    bdrv_acct_done(req->dev->bs, &req->acct);
+    g_free(req);
+}
+
+static void virtio_blk_flush_complete(void *opaque, int ret)
+{
+    VirtIOBlockReq *req = opaque;
+
+    if (ret) {
+        if (virtio_blk_handle_rw_error(req, -ret, 0)) {
+            return;
+        }
+    }
+
+    virtio_blk_req_complete(req, VIRTIO_BLK_S_OK);
+    bdrv_acct_done(req->dev->bs, &req->acct);
+    g_free(req);
+}
+
+static VirtIOBlockReq *virtio_blk_alloc_request(VirtIOBlock *s)
+{
+    VirtIOBlockReq *req = g_malloc(sizeof(*req));
+    req->dev = s;
+    req->qiov.size = 0;
+    req->next = NULL;
+    return req;
+}
+
+static VirtIOBlockReq *virtio_blk_get_request(VirtIOBlock *s)
+{
+    VirtIOBlockReq *req = virtio_blk_alloc_request(s);
+
+    if (req != NULL) {
+        if (!virtqueue_pop(s->vq, &req->elem)) {
+            g_free(req);
+            return NULL;
+        }
+    }
+
+    return req;
+}
+
+static void virtio_blk_handle_scsi(VirtIOBlockReq *req)
+{
+#ifdef __linux__
+    int ret;
+    int i;
+#endif
+    int status = VIRTIO_BLK_S_OK;
+
+    /*
+     * We require at least one output segment each for the virtio_blk_outhdr
+     * and the SCSI command block.
+     *
+     * We also at least require the virtio_blk_inhdr, the virtio_scsi_inhdr
+     * and the sense buffer pointer in the input segments.
+     */
+    if (req->elem.out_num < 2 || req->elem.in_num < 3) {
+        virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
+        g_free(req);
+        return;
+    }
+
+    /*
+     * The scsi inhdr is placed in the second-to-last input segment, just
+     * before the regular inhdr.
+     */
+    req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base;
+
+    if (!req->dev->blk.scsi) {
+        status = VIRTIO_BLK_S_UNSUPP;
+        goto fail;
+    }
+
+    /*
+     * No support for bidirection commands yet.
+     */
+    if (req->elem.out_num > 2 && req->elem.in_num > 3) {
+        status = VIRTIO_BLK_S_UNSUPP;
+        goto fail;
+    }
+
+#ifdef __linux__
+    struct sg_io_hdr hdr;
+    memset(&hdr, 0, sizeof(struct sg_io_hdr));
+    hdr.interface_id = 'S';
+    hdr.cmd_len = req->elem.out_sg[1].iov_len;
+    hdr.cmdp = req->elem.out_sg[1].iov_base;
+    hdr.dxfer_len = 0;
+
+    if (req->elem.out_num > 2) {
+        /*
+         * If there are more than the minimally required 2 output segments
+         * there is write payload starting from the third iovec.
+         */
+        hdr.dxfer_direction = SG_DXFER_TO_DEV;
+        hdr.iovec_count = req->elem.out_num - 2;
+
+        for (i = 0; i < hdr.iovec_count; i++)
+            hdr.dxfer_len += req->elem.out_sg[i + 2].iov_len;
+
+        hdr.dxferp = req->elem.out_sg + 2;
+
+    } else if (req->elem.in_num > 3) {
+        /*
+         * If we have more than 3 input segments the guest wants to actually
+         * read data.
+         */
+        hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+        hdr.iovec_count = req->elem.in_num - 3;
+        for (i = 0; i < hdr.iovec_count; i++)
+            hdr.dxfer_len += req->elem.in_sg[i].iov_len;
+
+        hdr.dxferp = req->elem.in_sg;
+    } else {
+        /*
+         * Some SCSI commands don't actually transfer any data.
+         */
+        hdr.dxfer_direction = SG_DXFER_NONE;
+    }
+
+    hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base;
+    hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len;
+
+    ret = bdrv_ioctl(req->dev->bs, SG_IO, &hdr);
+    if (ret) {
+        status = VIRTIO_BLK_S_UNSUPP;
+        goto fail;
+    }
+
+    /*
+     * From SCSI-Generic-HOWTO: "Some lower level drivers (e.g. ide-scsi)
+     * clear the masked_status field [hence status gets cleared too, see
+     * block/scsi_ioctl.c] even when a CHECK_CONDITION or COMMAND_TERMINATED
+     * status has occurred.  However they do set DRIVER_SENSE in driver_status
+     * field. Also a (sb_len_wr > 0) indicates there is a sense buffer.
+     */
+    if (hdr.status == 0 && hdr.sb_len_wr > 0) {
+        hdr.status = CHECK_CONDITION;
+    }
+
+    stl_p(&req->scsi->errors,
+          hdr.status | (hdr.msg_status << 8) |
+          (hdr.host_status << 16) | (hdr.driver_status << 24));
+    stl_p(&req->scsi->residual, hdr.resid);
+    stl_p(&req->scsi->sense_len, hdr.sb_len_wr);
+    stl_p(&req->scsi->data_len, hdr.dxfer_len);
+
+    virtio_blk_req_complete(req, status);
+    g_free(req);
+    return;
+#else
+    abort();
+#endif
+
+fail:
+    /* Just put anything nonzero so that the ioctl fails in the guest.  */
+    stl_p(&req->scsi->errors, 255);
+    virtio_blk_req_complete(req, status);
+    g_free(req);
+}
+
+typedef struct MultiReqBuffer {
+    BlockRequest        blkreq[32];
+    unsigned int        num_writes;
+} MultiReqBuffer;
+
+static void virtio_submit_multiwrite(BlockDriverState *bs, MultiReqBuffer *mrb)
+{
+    int i, ret;
+
+    if (!mrb->num_writes) {
+        return;
+    }
+
+    ret = bdrv_aio_multiwrite(bs, mrb->blkreq, mrb->num_writes);
+    if (ret != 0) {
+        for (i = 0; i < mrb->num_writes; i++) {
+            if (mrb->blkreq[i].error) {
+                virtio_blk_rw_complete(mrb->blkreq[i].opaque, -EIO);
+            }
+        }
+    }
+
+    mrb->num_writes = 0;
+}
+
+static void virtio_blk_handle_flush(VirtIOBlockReq *req, MultiReqBuffer *mrb)
+{
+    bdrv_acct_start(req->dev->bs, &req->acct, 0, BDRV_ACCT_FLUSH);
+
+    /*
+     * Make sure all outstanding writes are posted to the backing device.
+     */
+    virtio_submit_multiwrite(req->dev->bs, mrb);
+    bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req);
+}
+
+static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb)
+{
+    BlockRequest *blkreq;
+    uint64_t sector;
+
+    sector = ldq_p(&req->out->sector);
+
+    bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_WRITE);
+
+    trace_virtio_blk_handle_write(req, sector, req->qiov.size / 512);
+
+    if (sector & req->dev->sector_mask) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
+    if (req->qiov.size % req->dev->conf->logical_block_size) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
+
+    if (mrb->num_writes == 32) {
+        virtio_submit_multiwrite(req->dev->bs, mrb);
+    }
+
+    blkreq = &mrb->blkreq[mrb->num_writes];
+    blkreq->sector = sector;
+    blkreq->nb_sectors = req->qiov.size / BDRV_SECTOR_SIZE;
+    blkreq->qiov = &req->qiov;
+    blkreq->cb = virtio_blk_rw_complete;
+    blkreq->opaque = req;
+    blkreq->error = 0;
+
+    mrb->num_writes++;
+}
+
+static void virtio_blk_handle_read(VirtIOBlockReq *req)
+{
+    uint64_t sector;
+
+    sector = ldq_p(&req->out->sector);
+
+    bdrv_acct_start(req->dev->bs, &req->acct, req->qiov.size, BDRV_ACCT_READ);
+
+    trace_virtio_blk_handle_read(req, sector, req->qiov.size / 512);
+
+    if (sector & req->dev->sector_mask) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
+    if (req->qiov.size % req->dev->conf->logical_block_size) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
+    bdrv_aio_readv(req->dev->bs, sector, &req->qiov,
+                   req->qiov.size / BDRV_SECTOR_SIZE,
+                   virtio_blk_rw_complete, req);
+}
+
+static void virtio_blk_handle_request(VirtIOBlockReq *req,
+    MultiReqBuffer *mrb)
+{
+    uint32_t type;
+
+    if (req->elem.out_num < 1 || req->elem.in_num < 1) {
+        error_report("virtio-blk missing headers");
+        exit(1);
+    }
+
+    if (req->elem.out_sg[0].iov_len < sizeof(*req->out) ||
+        req->elem.in_sg[req->elem.in_num - 1].iov_len < sizeof(*req->in)) {
+        error_report("virtio-blk header not in correct element");
+        exit(1);
+    }
+
+    req->out = (void *)req->elem.out_sg[0].iov_base;
+    req->in = (void *)req->elem.in_sg[req->elem.in_num - 1].iov_base;
+
+    type = ldl_p(&req->out->type);
+
+    if (type & VIRTIO_BLK_T_FLUSH) {
+        virtio_blk_handle_flush(req, mrb);
+    } else if (type & VIRTIO_BLK_T_SCSI_CMD) {
+        virtio_blk_handle_scsi(req);
+    } else if (type & VIRTIO_BLK_T_GET_ID) {
+        VirtIOBlock *s = req->dev;
+
+        /*
+         * NB: per existing s/n string convention the string is
+         * terminated by '\0' only when shorter than buffer.
+         */
+        strncpy(req->elem.in_sg[0].iov_base,
+                s->blk.serial ? s->blk.serial : "",
+                MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES));
+        virtio_blk_req_complete(req, VIRTIO_BLK_S_OK);
+        g_free(req);
+    } else if (type & VIRTIO_BLK_T_OUT) {
+        qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1],
+                                 req->elem.out_num - 1);
+        virtio_blk_handle_write(req, mrb);
+    } else if (type == VIRTIO_BLK_T_IN || type == VIRTIO_BLK_T_BARRIER) {
+        /* VIRTIO_BLK_T_IN is 0, so we can't just & it. */
+        qemu_iovec_init_external(&req->qiov, &req->elem.in_sg[0],
+                                 req->elem.in_num - 1);
+        virtio_blk_handle_read(req);
+    } else {
+        virtio_blk_req_complete(req, VIRTIO_BLK_S_UNSUPP);
+        g_free(req);
+    }
+}
+
+static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    VirtIOBlockReq *req;
+    MultiReqBuffer mrb = {
+        .num_writes = 0,
+    };
+
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+    /* Some guests kick before setting VIRTIO_CONFIG_S_DRIVER_OK so start
+     * dataplane here instead of waiting for .set_status().
+     */
+    if (s->dataplane) {
+        virtio_blk_data_plane_start(s->dataplane);
+        return;
+    }
+#endif
+
+    while ((req = virtio_blk_get_request(s))) {
+        virtio_blk_handle_request(req, &mrb);
+    }
+
+    virtio_submit_multiwrite(s->bs, &mrb);
+
+    /*
+     * FIXME: Want to check for completions before returning to guest mode,
+     * so cached reads and writes are reported as quickly as possible. But
+     * that should be done in the generic block layer.
+     */
+}
+
+static void virtio_blk_dma_restart_bh(void *opaque)
+{
+    VirtIOBlock *s = opaque;
+    VirtIOBlockReq *req = s->rq;
+    MultiReqBuffer mrb = {
+        .num_writes = 0,
+    };
+
+    qemu_bh_delete(s->bh);
+    s->bh = NULL;
+
+    s->rq = NULL;
+
+    while (req) {
+        virtio_blk_handle_request(req, &mrb);
+        req = req->next;
+    }
+
+    virtio_submit_multiwrite(s->bs, &mrb);
+}
+
+static void virtio_blk_dma_restart_cb(void *opaque, int running,
+                                      RunState state)
+{
+    VirtIOBlock *s = opaque;
+
+    if (!running) {
+        return;
+    }
+
+    if (!s->bh) {
+        s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s);
+        qemu_bh_schedule(s->bh);
+    }
+}
+
+static void virtio_blk_reset(VirtIODevice *vdev)
+{
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+
+    if (s->dataplane) {
+        virtio_blk_data_plane_stop(s->dataplane);
+    }
+#endif
+
+    /*
+     * This should cancel pending requests, but can't do nicely until there
+     * are per-device request lists.
+     */
+    bdrv_drain_all();
+}
+
+/* coalesce internal state, copy to pci i/o region 0
+ */
+static void virtio_blk_update_config(VirtIODevice *vdev, uint8_t *config)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    struct virtio_blk_config blkcfg;
+    uint64_t capacity;
+    int blk_size = s->conf->logical_block_size;
+
+    bdrv_get_geometry(s->bs, &capacity);
+    memset(&blkcfg, 0, sizeof(blkcfg));
+    stq_raw(&blkcfg.capacity, capacity);
+    stl_raw(&blkcfg.seg_max, 128 - 2);
+    stw_raw(&blkcfg.cylinders, s->conf->cyls);
+    stl_raw(&blkcfg.blk_size, blk_size);
+    stw_raw(&blkcfg.min_io_size, s->conf->min_io_size / blk_size);
+    stw_raw(&blkcfg.opt_io_size, s->conf->opt_io_size / blk_size);
+    blkcfg.heads = s->conf->heads;
+    /*
+     * We must ensure that the block device capacity is a multiple of
+     * the logical block size. If that is not the case, lets use
+     * sector_mask to adopt the geometry to have a correct picture.
+     * For those devices where the capacity is ok for the given geometry
+     * we dont touch the sector value of the geometry, since some devices
+     * (like s390 dasd) need a specific value. Here the capacity is already
+     * cyls*heads*secs*blk_size and the sector value is not block size
+     * divided by 512 - instead it is the amount of blk_size blocks
+     * per track (cylinder).
+     */
+    if (bdrv_getlength(s->bs) /  s->conf->heads / s->conf->secs % blk_size) {
+        blkcfg.sectors = s->conf->secs & ~s->sector_mask;
+    } else {
+        blkcfg.sectors = s->conf->secs;
+    }
+    blkcfg.size_max = 0;
+    blkcfg.physical_block_exp = get_physical_block_exp(s->conf);
+    blkcfg.alignment_offset = 0;
+    blkcfg.wce = bdrv_enable_write_cache(s->bs);
+    memcpy(config, &blkcfg, sizeof(struct virtio_blk_config));
+}
+
+static void virtio_blk_set_config(VirtIODevice *vdev, const uint8_t *config)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    struct virtio_blk_config blkcfg;
+
+    memcpy(&blkcfg, config, sizeof(blkcfg));
+    bdrv_set_enable_write_cache(s->bs, blkcfg.wce != 0);
+}
+
+static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+
+    features |= (1 << VIRTIO_BLK_F_SEG_MAX);
+    features |= (1 << VIRTIO_BLK_F_GEOMETRY);
+    features |= (1 << VIRTIO_BLK_F_TOPOLOGY);
+    features |= (1 << VIRTIO_BLK_F_BLK_SIZE);
+    features |= (1 << VIRTIO_BLK_F_SCSI);
+
+    if (s->blk.config_wce) {
+        features |= (1 << VIRTIO_BLK_F_CONFIG_WCE);
+    }
+    if (bdrv_enable_write_cache(s->bs))
+        features |= (1 << VIRTIO_BLK_F_WCE);
+
+    if (bdrv_is_read_only(s->bs))
+        features |= 1 << VIRTIO_BLK_F_RO;
+
+    return features;
+}
+
+static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    uint32_t features;
+
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+    if (s->dataplane && !(status & (VIRTIO_CONFIG_S_DRIVER |
+                                    VIRTIO_CONFIG_S_DRIVER_OK))) {
+        virtio_blk_data_plane_stop(s->dataplane);
+    }
+#endif
+
+    if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
+        return;
+    }
+
+    features = vdev->guest_features;
+    bdrv_set_enable_write_cache(s->bs, !!(features & (1 << VIRTIO_BLK_F_WCE)));
+}
+
+static void virtio_blk_save(QEMUFile *f, void *opaque)
+{
+    VirtIOBlock *s = opaque;
+    VirtIODevice *vdev = VIRTIO_DEVICE(s);
+    VirtIOBlockReq *req = s->rq;
+
+    virtio_save(vdev, f);
+    
+    while (req) {
+        qemu_put_sbyte(f, 1);
+        qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem));
+        req = req->next;
+    }
+    qemu_put_sbyte(f, 0);
+}
+
+static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id)
+{
+    VirtIOBlock *s = opaque;
+    VirtIODevice *vdev = VIRTIO_DEVICE(s);
+    int ret;
+
+    if (version_id != 2)
+        return -EINVAL;
+
+    ret = virtio_load(vdev, f);
+    if (ret) {
+        return ret;
+    }
+
+    while (qemu_get_sbyte(f)) {
+        VirtIOBlockReq *req = virtio_blk_alloc_request(s);
+        qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem));
+        req->next = s->rq;
+        s->rq = req;
+
+        virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr,
+            req->elem.in_num, 1);
+        virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr,
+            req->elem.out_num, 0);
+    }
+
+    return 0;
+}
+
+static void virtio_blk_resize(void *opaque)
+{
+    VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
+
+    virtio_notify_config(vdev);
+}
+
+static const BlockDevOps virtio_block_ops = {
+    .resize_cb = virtio_blk_resize,
+};
+
+void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk)
+{
+    VirtIOBlock *s = VIRTIO_BLK(dev);
+    memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf));
+}
+
+static int virtio_blk_device_init(VirtIODevice *vdev)
+{
+    DeviceState *qdev = DEVICE(vdev);
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    VirtIOBlkConf *blk = &(s->blk);
+    static int virtio_blk_id;
+
+    if (!blk->conf.bs) {
+        error_report("drive property not set");
+        return -1;
+    }
+    if (!bdrv_is_inserted(blk->conf.bs)) {
+        error_report("Device needs media, but drive is empty");
+        return -1;
+    }
+
+    blkconf_serial(&blk->conf, &blk->serial);
+    if (blkconf_geometry(&blk->conf, NULL, 65535, 255, 255) < 0) {
+        return -1;
+    }
+
+    virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
+                sizeof(struct virtio_blk_config));
+
+    vdev->get_config = virtio_blk_update_config;
+    vdev->set_config = virtio_blk_set_config;
+    vdev->get_features = virtio_blk_get_features;
+    vdev->set_status = virtio_blk_set_status;
+    vdev->reset = virtio_blk_reset;
+    s->bs = blk->conf.bs;
+    s->conf = &blk->conf;
+    memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf));
+    s->rq = NULL;
+    s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1;
+
+    s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+    if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) {
+        virtio_common_cleanup(vdev);
+        return -1;
+    }
+#endif
+
+    s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s);
+    register_savevm(qdev, "virtio-blk", virtio_blk_id++, 2,
+                    virtio_blk_save, virtio_blk_load, s);
+    bdrv_set_dev_ops(s->bs, &virtio_block_ops, s);
+    bdrv_set_buffer_alignment(s->bs, s->conf->logical_block_size);
+
+    bdrv_iostatus_enable(s->bs);
+
+    add_boot_device_path(s->conf->bootindex, qdev, "/disk@0,0");
+    return 0;
+}
+
+static int virtio_blk_device_exit(DeviceState *dev)
+{
+    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+    VirtIOBlock *s = VIRTIO_BLK(dev);
+#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
+    virtio_blk_data_plane_destroy(s->dataplane);
+    s->dataplane = NULL;
+#endif
+    qemu_del_vm_change_state_handler(s->change);
+    unregister_savevm(dev, "virtio-blk", s);
+    blockdev_mark_auto_del(s->bs);
+    virtio_common_cleanup(vdev);
+    return 0;
+}
+
+static Property virtio_blk_properties[] = {
+    DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlock, blk),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_blk_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+    dc->exit = virtio_blk_device_exit;
+    dc->props = virtio_blk_properties;
+    vdc->init = virtio_blk_device_init;
+    vdc->get_config = virtio_blk_update_config;
+    vdc->set_config = virtio_blk_set_config;
+    vdc->get_features = virtio_blk_get_features;
+    vdc->set_status = virtio_blk_set_status;
+    vdc->reset = virtio_blk_reset;
+}
+
+static const TypeInfo virtio_device_info = {
+    .name = TYPE_VIRTIO_BLK,
+    .parent = TYPE_VIRTIO_DEVICE,
+    .instance_size = sizeof(VirtIOBlock),
+    .class_init = virtio_blk_class_init,
+};
+
+static void virtio_register_types(void)
+{
+    type_register_static(&virtio_device_info);
+}
+
+type_init(virtio_register_types)