static int execute_command(BlockDriverState *bdrv, SCSIGenericReq *r, int direction, BlockDriverCompletionFunc *complete) { SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev); r->io_header.interface_id = 'S'; r->io_header.dxfer_direction = direction; r->io_header.dxferp = r->buf; r->io_header.dxfer_len = r->buflen; r->io_header.cmdp = r->req.cmd.buf; r->io_header.cmd_len = r->req.cmd.len; r->io_header.mx_sb_len = sizeof(s->sensebuf); r->io_header.sbp = s->sensebuf; r->io_header.timeout = MAX_UINT; r->io_header.usr_ptr = r; r->io_header.flags |= SG_FLAG_DIRECT_IO; r->req.aiocb = bdrv_aio_ioctl(bdrv, SG_IO, &r->io_header, complete, r); if (r->req.aiocb == NULL) { BADF("execute_command: read failed !\n"); return -1; } return 0; }