227 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,  in blk_fill_sghdr_rq()  argument
230 	if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))  in blk_fill_sghdr_rq()
232 	if (blk_verify_command(rq->cmd, mode & FMODE_WRITE))  in blk_fill_sghdr_rq()
238 	rq->cmd_len = hdr->cmd_len;  in blk_fill_sghdr_rq()
240 	rq->timeout = msecs_to_jiffies(hdr->timeout);  in blk_fill_sghdr_rq()
241 	if (!rq->timeout)  in blk_fill_sghdr_rq()
242 		rq->timeout = q->sg_timeout;  in blk_fill_sghdr_rq()
243 	if (!rq->timeout)  in blk_fill_sghdr_rq()
244 		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;  in blk_fill_sghdr_rq()
245 	if (rq->timeout < BLK_MIN_SG_TIMEOUT)  in blk_fill_sghdr_rq()
246 		rq->timeout = BLK_MIN_SG_TIMEOUT;  in blk_fill_sghdr_rq()
251 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,  in blk_complete_sghdr_rq()  argument
259 	hdr->status = rq->errors & 0xff;  in blk_complete_sghdr_rq()
260 	hdr->masked_status = status_byte(rq->errors);  in blk_complete_sghdr_rq()
261 	hdr->msg_status = msg_byte(rq->errors);  in blk_complete_sghdr_rq()
262 	hdr->host_status = host_byte(rq->errors);  in blk_complete_sghdr_rq()
263 	hdr->driver_status = driver_byte(rq->errors);  in blk_complete_sghdr_rq()
267 	hdr->resid = rq->resid_len;  in blk_complete_sghdr_rq()
270 	if (rq->sense_len && hdr->sbp) {  in blk_complete_sghdr_rq()
271 		int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);  in blk_complete_sghdr_rq()
273 		if (!copy_to_user(hdr->sbp, rq->sense, len))  in blk_complete_sghdr_rq()
293 	struct request *rq;  in sg_io()  local
318 	rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);  in sg_io()
319 	if (IS_ERR(rq))  in sg_io()
320 		return PTR_ERR(rq);  in sg_io()
321 	blk_rq_set_block_pc(rq);  in sg_io()
324 		rq->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);  in sg_io()
325 		if (!rq->cmd)  in sg_io()
330 	if (blk_fill_sghdr_rq(q, rq, hdr, mode))  in sg_io()
338 		ret = import_iovec(rq_data_dir(rq),  in sg_io()
347 		ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);  in sg_io()
350 		ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,  in sg_io()
356 	bio = rq->bio;  in sg_io()
358 	rq->sense = sense;  in sg_io()
359 	rq->sense_len = 0;  in sg_io()
360 	rq->retries = 0;  in sg_io()
368 	blk_execute_rq(q, bd_disk, rq, at_head);  in sg_io()
372 	ret = blk_complete_sghdr_rq(rq, hdr, bio);  in sg_io()
375 	if (rq->cmd != rq->__cmd)  in sg_io()
376 		kfree(rq->cmd);  in sg_io()
378 	blk_put_request(rq);  in sg_io()
419 	struct request *rq;  in sg_scsi_ioctl()  local
447 	rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);  in sg_scsi_ioctl()
448 	if (IS_ERR(rq)) {  in sg_scsi_ioctl()
449 		err = PTR_ERR(rq);  in sg_scsi_ioctl()
452 	blk_rq_set_block_pc(rq);  in sg_scsi_ioctl()
460 	rq->cmd_len = cmdlen;  in sg_scsi_ioctl()
461 	if (copy_from_user(rq->cmd, sic->data, cmdlen))  in sg_scsi_ioctl()
467 	err = blk_verify_command(rq->cmd, mode & FMODE_WRITE);  in sg_scsi_ioctl()
472 	rq->retries = 5;  in sg_scsi_ioctl()
477 		rq->timeout = FORMAT_UNIT_TIMEOUT;  in sg_scsi_ioctl()
478 		rq->retries = 1;  in sg_scsi_ioctl()
481 		rq->timeout = START_STOP_TIMEOUT;  in sg_scsi_ioctl()
484 		rq->timeout = MOVE_MEDIUM_TIMEOUT;  in sg_scsi_ioctl()
487 		rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;  in sg_scsi_ioctl()
490 		rq->timeout = READ_DEFECT_DATA_TIMEOUT;  in sg_scsi_ioctl()
491 		rq->retries = 1;  in sg_scsi_ioctl()
494 		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;  in sg_scsi_ioctl()
498 	if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {  in sg_scsi_ioctl()
504 	rq->sense = sense;  in sg_scsi_ioctl()
505 	rq->sense_len = 0;  in sg_scsi_ioctl()
507 	blk_execute_rq(q, disk, rq, 0);  in sg_scsi_ioctl()
509 	err = rq->errors & 0xff;	/* only 8 bit SCSI status */  in sg_scsi_ioctl()
511 		if (rq->sense_len && rq->sense) {  in sg_scsi_ioctl()
512 			bytes = (OMAX_SB_LEN > rq->sense_len) ?  in sg_scsi_ioctl()
513 				rq->sense_len : OMAX_SB_LEN;  in sg_scsi_ioctl()
514 			if (copy_to_user(sic->data, rq->sense, bytes))  in sg_scsi_ioctl()
523 	blk_put_request(rq);  in sg_scsi_ioctl()
536 	struct request *rq;  in __blk_send_generic()  local
539 	rq = blk_get_request(q, WRITE, __GFP_WAIT);  in __blk_send_generic()
540 	if (IS_ERR(rq))  in __blk_send_generic()
541 		return PTR_ERR(rq);  in __blk_send_generic()
542 	blk_rq_set_block_pc(rq);  in __blk_send_generic()
543 	rq->timeout = BLK_DEFAULT_SG_TIMEOUT;  in __blk_send_generic()
544 	rq->cmd[0] = cmd;  in __blk_send_generic()
545 	rq->cmd[4] = data;  in __blk_send_generic()
546 	rq->cmd_len = 6;  in __blk_send_generic()
547 	err = blk_execute_rq(q, bd_disk, rq, 0);  in __blk_send_generic()
548 	blk_put_request(rq);  in __blk_send_generic()