VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf, char **serial) { VirtIOBlock *s; int cylinders, heads, secs; static int virtio_blk_id; DriveInfo *dinfo; if (!conf->bs) { error_report("virtio-blk-pci: drive property not set"); return NULL; } if (!bdrv_is_inserted(conf->bs)) { error_report("Device needs media, but drive is empty"); return NULL; } if (!*serial) { /* try to fall back to value set with legacy -drive serial=... */ dinfo = drive_get_by_blockdev(conf->bs); if (*dinfo->serial) { *serial = strdup(dinfo->serial); } } s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK, sizeof(struct virtio_blk_config), sizeof(VirtIOBlock)); s->vdev.get_config = virtio_blk_update_config; s->vdev.get_features = virtio_blk_get_features; s->vdev.reset = virtio_blk_reset; s->bs = conf->bs; s->conf = conf; s->serial = *serial; s->rq = NULL; s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1; bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs); s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output); qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); s->qdev = dev; register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, virtio_blk_save, virtio_blk_load, s); bdrv_set_removable(s->bs, 0); bdrv_set_change_cb(s->bs, virtio_blk_change_cb, s); s->bs->buffer_alignment = conf->logical_block_size; add_boot_device_path(conf->bootindex, dev, "/disk@0,0"); return &s->vdev; }
VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) { VirtIOBlock *s; int cylinders, heads, secs; static int virtio_blk_id; DriveInfo *dinfo; if (!conf->bs) { error_report("virtio-blk-pci: drive property not set"); return NULL; } if (!bdrv_is_inserted(conf->bs)) { error_report("Device needs media, but drive is empty"); return NULL; } s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK, sizeof(struct virtio_blk_config), sizeof(VirtIOBlock)); s->vdev.get_config = virtio_blk_update_config; s->vdev.get_features = virtio_blk_get_features; s->vdev.reset = virtio_blk_reset; s->bs = conf->bs; s->conf = conf; s->rq = NULL; s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1; bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs); /* NB: per existing s/n string convention the string is terminated * by '\0' only when less than sizeof (s->sn) */ dinfo = drive_get_by_blockdev(s->bs); strncpy(s->sn, dinfo->serial, sizeof (s->sn)); s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output); qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); s->qdev = dev; register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, virtio_blk_save, virtio_blk_load, s); bdrv_set_removable(s->bs, 0); s->bs->buffer_alignment = conf->logical_block_size; add_boot_device_path(conf->bootindex, dev, "/disk@0,0"); return &s->vdev; }
static int scsi_generic_initfn(SCSIDevice *dev) { SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, dev); int sg_version; struct sg_scsi_id scsiid; if (!s->qdev.conf.bs) { error_report("scsi-generic: drive property not set"); return -1; } s->bs = s->qdev.conf.bs; /* check we are really using a /dev/sg* file */ if (!bdrv_is_sg(s->bs)) { error_report("scsi-generic: not /dev/sg*"); return -1; } if (bdrv_get_on_error(s->bs, 0) != BLOCK_ERR_STOP_ENOSPC) { error_report("Device doesn't support drive option werror"); return -1; } if (bdrv_get_on_error(s->bs, 1) != BLOCK_ERR_REPORT) { error_report("Device doesn't support drive option rerror"); return -1; } /* check we are using a driver managing SG_IO (version 3 and after */ if (bdrv_ioctl(s->bs, SG_GET_VERSION_NUM, &sg_version) < 0 || sg_version < 30000) { error_report("scsi-generic: scsi generic interface too old"); return -1; } /* get LUN of the /dev/sg? */ if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) { error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed"); return -1; } /* define device state */ s->lun = scsiid.lun; DPRINTF("LUN %d\n", s->lun); s->qdev.type = scsiid.scsi_type; DPRINTF("device type %d\n", s->qdev.type); if (s->qdev.type == TYPE_TAPE) { s->qdev.blocksize = get_stream_blocksize(s->bs); if (s->qdev.blocksize == -1) s->qdev.blocksize = 0; } else { s->qdev.blocksize = get_blocksize(s->bs); /* removable media returns 0 if not present */ if (s->qdev.blocksize <= 0) { if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) s->qdev.blocksize = 2048; else s->qdev.blocksize = 512; } } DPRINTF("block size %d\n", s->qdev.blocksize); s->driver_status = 0; memset(s->sensebuf, 0, sizeof(s->sensebuf)); bdrv_set_removable(s->bs, 0); return 0; }