static int execute_command(BlockDriverState *bdrv, SCSIRequest *r, int direction, BlockDriverCompletionFunc *complete) { 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->cmd; r->io_header.cmd_len = r->cmdlen; r->io_header.mx_sb_len = sizeof(r->dev->sensebuf); r->io_header.sbp = r->dev->sensebuf; r->io_header.timeout = MAX_UINT; r->io_header.usr_ptr = r; r->io_header.flags |= SG_FLAG_DIRECT_IO; if (bdrv_pwrite(bdrv, -1, &r->io_header, sizeof(r->io_header)) == -1) { BADF("execute_command: write failed ! (%d)\n", errno); return -1; } if (complete == NULL) { int ret; r->aiocb = NULL; while ((ret = bdrv_pread(bdrv, -1, &r->io_header, sizeof(r->io_header))) == -1 && errno == EINTR); if (ret == -1) { BADF("execute_command: read failed !\n"); return -1; } return 0; } r->aiocb = bdrv_aio_read(bdrv, 0, (uint8_t*)&r->io_header, -(int64_t)sizeof(r->io_header), complete, r); if (r->aiocb == NULL) { BADF("execute_command: read failed !\n"); return -1; } return 0; }