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.dinfo || !s->qdev.conf.dinfo->bdrv) { error_report("scsi-generic: drive property not set"); return -1; } s->bs = s->qdev.conf.dinfo->bdrv; /* check we are really using a /dev/sg* file */ if (!bdrv_is_sg(s->bs)) { error_report("scsi-generic: not /dev/sg*"); 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)); return 0; }
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.dinfo || !s->qdev.conf.dinfo->bdrv) { error_report("scsi-generic: drive property not set"); return -1; } s->bs = s->qdev.conf.dinfo->bdrv;   if (!bdrv_is_sg(s->bs)) { error_report("scsi-generic: not /dev/sg*"); return -1; }   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; }   if (bdrv_ioctl(s->bs, SG_GET_SCSI_ID, &scsiid)) { error_report("scsi-generic: SG_GET_SCSI_ID ioctl failed"); return -1; }   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);   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)); return 0; }