static void scsi_read_complete(void * opaque, int ret) { SCSIGenericReq *r = (SCSIGenericReq *)opaque; SCSIDevice *s = r->req.dev; int len; r->req.aiocb = NULL; if (ret || r->req.io_canceled) { scsi_command_complete(r, ret); return; } len = r->io_header.dxfer_len - r->io_header.resid; DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len); r->len = -1; if (len == 0) { scsi_command_complete(r, 0); } else { /* Snoop READ CAPACITY output to set the blocksize. */ if (r->req.cmd.buf[0] == READ_CAPACITY_10 && (ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) { s->blocksize = ldl_be_p(&r->buf[4]); s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL; } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 && (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) { s->blocksize = ldl_be_p(&r->buf[8]); s->max_lba = ldq_be_p(&r->buf[0]); } bdrv_set_guest_block_size(s->conf.bs, s->blocksize); scsi_req_data(&r->req, len); scsi_req_unref(&r->req); } }