scsi-ioctl: use clock_t <> jiffies
[linux-2.6.git] / block / scsi_ioctl.c
1 /*
2  * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  *
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public Licens
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
17  *
18  */
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/module.h>
23 #include <linux/blkdev.h>
24 #include <linux/capability.h>
25 #include <linux/completion.h>
26 #include <linux/cdrom.h>
27 #include <linux/slab.h>
28 #include <linux/times.h>
29 #include <asm/uaccess.h>
30
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_ioctl.h>
33 #include <scsi/scsi_cmnd.h>
34
35 /* Command group 3 is reserved and should never be used.  */
36 const unsigned char scsi_command_size_tbl[8] =
37 {
38         6, 10, 10, 12,
39         16, 12, 10, 10
40 };
41 EXPORT_SYMBOL(scsi_command_size_tbl);
42
43 #include <scsi/sg.h>
44
45 static int sg_get_version(int __user *p)
46 {
47         static const int sg_version_num = 30527;
48         return put_user(sg_version_num, p);
49 }
50
51 static int scsi_get_idlun(struct request_queue *q, int __user *p)
52 {
53         return put_user(0, p);
54 }
55
56 static int scsi_get_bus(struct request_queue *q, int __user *p)
57 {
58         return put_user(0, p);
59 }
60
61 static int sg_get_timeout(struct request_queue *q)
62 {
63         return jiffies_to_clock_t(q->sg_timeout);
64 }
65
66 static int sg_set_timeout(struct request_queue *q, int __user *p)
67 {
68         int timeout, err = get_user(timeout, p);
69
70         if (!err)
71                 q->sg_timeout = clock_t_to_jiffies(timeout);
72
73         return err;
74 }
75
76 static int sg_get_reserved_size(struct request_queue *q, int __user *p)
77 {
78         unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
79
80         return put_user(val, p);
81 }
82
83 static int sg_set_reserved_size(struct request_queue *q, int __user *p)
84 {
85         int size, err = get_user(size, p);
86
87         if (err)
88                 return err;
89
90         if (size < 0)
91                 return -EINVAL;
92         if (size > (q->max_sectors << 9))
93                 size = q->max_sectors << 9;
94
95         q->sg_reserved_size = size;
96         return 0;
97 }
98
99 /*
100  * will always return that we are ATAPI even for a real SCSI drive, I'm not
101  * so sure this is worth doing anything about (why would you care??)
102  */
103 static int sg_emulated_host(struct request_queue *q, int __user *p)
104 {
105         return put_user(1, p);
106 }
107
108 void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
109 {
110         /* Basic read-only commands */
111         __set_bit(TEST_UNIT_READY, filter->read_ok);
112         __set_bit(REQUEST_SENSE, filter->read_ok);
113         __set_bit(READ_6, filter->read_ok);
114         __set_bit(READ_10, filter->read_ok);
115         __set_bit(READ_12, filter->read_ok);
116         __set_bit(READ_16, filter->read_ok);
117         __set_bit(READ_BUFFER, filter->read_ok);
118         __set_bit(READ_DEFECT_DATA, filter->read_ok);
119         __set_bit(READ_CAPACITY, filter->read_ok);
120         __set_bit(READ_LONG, filter->read_ok);
121         __set_bit(INQUIRY, filter->read_ok);
122         __set_bit(MODE_SENSE, filter->read_ok);
123         __set_bit(MODE_SENSE_10, filter->read_ok);
124         __set_bit(LOG_SENSE, filter->read_ok);
125         __set_bit(START_STOP, filter->read_ok);
126         __set_bit(GPCMD_VERIFY_10, filter->read_ok);
127         __set_bit(VERIFY_16, filter->read_ok);
128         __set_bit(REPORT_LUNS, filter->read_ok);
129         __set_bit(SERVICE_ACTION_IN, filter->read_ok);
130         __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
131         __set_bit(MAINTENANCE_IN, filter->read_ok);
132         __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
133
134         /* Audio CD commands */
135         __set_bit(GPCMD_PLAY_CD, filter->read_ok);
136         __set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
137         __set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
138         __set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
139         __set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
140
141         /* CD/DVD data reading */
142         __set_bit(GPCMD_READ_CD, filter->read_ok);
143         __set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
144         __set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
145         __set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
146         __set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
147         __set_bit(GPCMD_READ_HEADER, filter->read_ok);
148         __set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
149         __set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
150         __set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
151         __set_bit(GPCMD_REPORT_KEY, filter->read_ok);
152         __set_bit(GPCMD_SCAN, filter->read_ok);
153         __set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
154         __set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
155         __set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
156         __set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
157         __set_bit(GPCMD_SEEK, filter->read_ok);
158         __set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
159
160         /* Basic writing commands */
161         __set_bit(WRITE_6, filter->write_ok);
162         __set_bit(WRITE_10, filter->write_ok);
163         __set_bit(WRITE_VERIFY, filter->write_ok);
164         __set_bit(WRITE_12, filter->write_ok);
165         __set_bit(WRITE_VERIFY_12, filter->write_ok);
166         __set_bit(WRITE_16, filter->write_ok);
167         __set_bit(WRITE_LONG, filter->write_ok);
168         __set_bit(WRITE_LONG_2, filter->write_ok);
169         __set_bit(ERASE, filter->write_ok);
170         __set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
171         __set_bit(MODE_SELECT, filter->write_ok);
172         __set_bit(LOG_SELECT, filter->write_ok);
173         __set_bit(GPCMD_BLANK, filter->write_ok);
174         __set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
175         __set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
176         __set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
177         __set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
178         __set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
179         __set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
180         __set_bit(GPCMD_SEND_EVENT, filter->write_ok);
181         __set_bit(GPCMD_SEND_KEY, filter->write_ok);
182         __set_bit(GPCMD_SEND_OPC, filter->write_ok);
183         __set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
184         __set_bit(GPCMD_SET_SPEED, filter->write_ok);
185         __set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
186         __set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
187         __set_bit(GPCMD_SET_STREAMING, filter->write_ok);
188         __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
189 }
190 EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults);
191
192 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
193                              struct sg_io_hdr *hdr, fmode_t mode)
194 {
195         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
196                 return -EFAULT;
197         if (blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE))
198                 return -EPERM;
199
200         /*
201          * fill in request structure
202          */
203         rq->cmd_len = hdr->cmd_len;
204         rq->cmd_type = REQ_TYPE_BLOCK_PC;
205
206         rq->timeout = msecs_to_jiffies(hdr->timeout);
207         if (!rq->timeout)
208                 rq->timeout = q->sg_timeout;
209         if (!rq->timeout)
210                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
211         if (rq->timeout < BLK_MIN_SG_TIMEOUT)
212                 rq->timeout = BLK_MIN_SG_TIMEOUT;
213
214         return 0;
215 }
216
217 /*
218  * unmap a request that was previously mapped to this sg_io_hdr. handles
219  * both sg and non-sg sg_io_hdr.
220  */
221 static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
222 {
223         blk_rq_unmap_user(rq->bio);
224         blk_put_request(rq);
225         return 0;
226 }
227
228 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
229                                  struct bio *bio)
230 {
231         int r, ret = 0;
232
233         /*
234          * fill in all the output members
235          */
236         hdr->status = rq->errors & 0xff;
237         hdr->masked_status = status_byte(rq->errors);
238         hdr->msg_status = msg_byte(rq->errors);
239         hdr->host_status = host_byte(rq->errors);
240         hdr->driver_status = driver_byte(rq->errors);
241         hdr->info = 0;
242         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
243                 hdr->info |= SG_INFO_CHECK;
244         hdr->resid = rq->data_len;
245         hdr->sb_len_wr = 0;
246
247         if (rq->sense_len && hdr->sbp) {
248                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
249
250                 if (!copy_to_user(hdr->sbp, rq->sense, len))
251                         hdr->sb_len_wr = len;
252                 else
253                         ret = -EFAULT;
254         }
255
256         rq->bio = bio;
257         r = blk_unmap_sghdr_rq(rq, hdr);
258         if (ret)
259                 r = ret;
260
261         return r;
262 }
263
264 static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
265                 struct sg_io_hdr *hdr, fmode_t mode)
266 {
267         unsigned long start_time;
268         int writing = 0, ret = 0;
269         struct request *rq;
270         char sense[SCSI_SENSE_BUFFERSIZE];
271         struct bio *bio;
272
273         if (hdr->interface_id != 'S')
274                 return -EINVAL;
275         if (hdr->cmd_len > BLK_MAX_CDB)
276                 return -EINVAL;
277
278         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
279                 return -EIO;
280
281         if (hdr->dxfer_len)
282                 switch (hdr->dxfer_direction) {
283                 default:
284                         return -EINVAL;
285                 case SG_DXFER_TO_DEV:
286                         writing = 1;
287                         break;
288                 case SG_DXFER_TO_FROM_DEV:
289                 case SG_DXFER_FROM_DEV:
290                         break;
291                 }
292
293         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
294         if (!rq)
295                 return -ENOMEM;
296
297         if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
298                 blk_put_request(rq);
299                 return -EFAULT;
300         }
301
302         if (hdr->iovec_count) {
303                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
304                 struct sg_iovec *iov;
305
306                 iov = kmalloc(size, GFP_KERNEL);
307                 if (!iov) {
308                         ret = -ENOMEM;
309                         goto out;
310                 }
311
312                 if (copy_from_user(iov, hdr->dxferp, size)) {
313                         kfree(iov);
314                         ret = -EFAULT;
315                         goto out;
316                 }
317
318                 ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
319                                           hdr->dxfer_len, GFP_KERNEL);
320                 kfree(iov);
321         } else if (hdr->dxfer_len)
322                 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
323                                       GFP_KERNEL);
324
325         if (ret)
326                 goto out;
327
328         bio = rq->bio;
329         memset(sense, 0, sizeof(sense));
330         rq->sense = sense;
331         rq->sense_len = 0;
332         rq->retries = 0;
333
334         start_time = jiffies;
335
336         /* ignore return value. All information is passed back to caller
337          * (if he doesn't check that is his problem).
338          * N.B. a non-zero SCSI status is _not_ necessarily an error.
339          */
340         blk_execute_rq(q, bd_disk, rq, 0);
341
342         hdr->duration = jiffies_to_msecs(jiffies - start_time);
343
344         return blk_complete_sghdr_rq(rq, hdr, bio);
345 out:
346         blk_put_request(rq);
347         return ret;
348 }
349
350 /**
351  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
352  * @file:       file this ioctl operates on (optional)
353  * @q:          request queue to send scsi commands down
354  * @disk:       gendisk to operate on (option)
355  * @sic:        userspace structure describing the command to perform
356  *
357  * Send down the scsi command described by @sic to the device below
358  * the request queue @q.  If @file is non-NULL it's used to perform
359  * fine-grained permission checks that allow users to send down
360  * non-destructive SCSI commands.  If the caller has a struct gendisk
361  * available it should be passed in as @disk to allow the low level
362  * driver to use the information contained in it.  A non-NULL @disk
363  * is only allowed if the caller knows that the low level driver doesn't
364  * need it (e.g. in the scsi subsystem).
365  *
366  * Notes:
367  *   -  This interface is deprecated - users should use the SG_IO
368  *      interface instead, as this is a more flexible approach to
369  *      performing SCSI commands on a device.
370  *   -  The SCSI command length is determined by examining the 1st byte
371  *      of the given command. There is no way to override this.
372  *   -  Data transfers are limited to PAGE_SIZE
373  *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
374  *      accommodate the sense buffer when an error occurs.
375  *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
376  *      old code will not be surprised.
377  *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
378  *      a negative return and the Unix error code in 'errno'.
379  *      If the SCSI command succeeds then 0 is returned.
380  *      Positive numbers returned are the compacted SCSI error codes (4
381  *      bytes in one int) where the lowest byte is the SCSI status.
382  */
383 #define OMAX_SB_LEN 16          /* For backward compatibility */
384 int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
385                 struct scsi_ioctl_command __user *sic)
386 {
387         struct request *rq;
388         int err;
389         unsigned int in_len, out_len, bytes, opcode, cmdlen;
390         char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
391
392         if (!sic)
393                 return -EINVAL;
394
395         /*
396          * get in an out lengths, verify they don't exceed a page worth of data
397          */
398         if (get_user(in_len, &sic->inlen))
399                 return -EFAULT;
400         if (get_user(out_len, &sic->outlen))
401                 return -EFAULT;
402         if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
403                 return -EINVAL;
404         if (get_user(opcode, sic->data))
405                 return -EFAULT;
406
407         bytes = max(in_len, out_len);
408         if (bytes) {
409                 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
410                 if (!buffer)
411                         return -ENOMEM;
412
413         }
414
415         rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
416
417         cmdlen = COMMAND_SIZE(opcode);
418
419         /*
420          * get command and data to send to device, if any
421          */
422         err = -EFAULT;
423         rq->cmd_len = cmdlen;
424         if (copy_from_user(rq->cmd, sic->data, cmdlen))
425                 goto error;
426
427         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
428                 goto error;
429
430         err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE);
431         if (err)
432                 goto error;
433
434         /* default.  possible overriden later */
435         rq->retries = 5;
436
437         switch (opcode) {
438         case SEND_DIAGNOSTIC:
439         case FORMAT_UNIT:
440                 rq->timeout = FORMAT_UNIT_TIMEOUT;
441                 rq->retries = 1;
442                 break;
443         case START_STOP:
444                 rq->timeout = START_STOP_TIMEOUT;
445                 break;
446         case MOVE_MEDIUM:
447                 rq->timeout = MOVE_MEDIUM_TIMEOUT;
448                 break;
449         case READ_ELEMENT_STATUS:
450                 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
451                 break;
452         case READ_DEFECT_DATA:
453                 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
454                 rq->retries = 1;
455                 break;
456         default:
457                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
458                 break;
459         }
460
461         if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
462                 err = DRIVER_ERROR << 24;
463                 goto out;
464         }
465
466         memset(sense, 0, sizeof(sense));
467         rq->sense = sense;
468         rq->sense_len = 0;
469         rq->cmd_type = REQ_TYPE_BLOCK_PC;
470
471         blk_execute_rq(q, disk, rq, 0);
472
473 out:
474         err = rq->errors & 0xff;        /* only 8 bit SCSI status */
475         if (err) {
476                 if (rq->sense_len && rq->sense) {
477                         bytes = (OMAX_SB_LEN > rq->sense_len) ?
478                                 rq->sense_len : OMAX_SB_LEN;
479                         if (copy_to_user(sic->data, rq->sense, bytes))
480                                 err = -EFAULT;
481                 }
482         } else {
483                 if (copy_to_user(sic->data, buffer, out_len))
484                         err = -EFAULT;
485         }
486         
487 error:
488         kfree(buffer);
489         blk_put_request(rq);
490         return err;
491 }
492 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
493
494 /* Send basic block requests */
495 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
496                               int cmd, int data)
497 {
498         struct request *rq;
499         int err;
500
501         rq = blk_get_request(q, WRITE, __GFP_WAIT);
502         rq->cmd_type = REQ_TYPE_BLOCK_PC;
503         rq->data = NULL;
504         rq->data_len = 0;
505         rq->extra_len = 0;
506         rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
507         rq->cmd[0] = cmd;
508         rq->cmd[4] = data;
509         rq->cmd_len = 6;
510         err = blk_execute_rq(q, bd_disk, rq, 0);
511         blk_put_request(rq);
512
513         return err;
514 }
515
516 static inline int blk_send_start_stop(struct request_queue *q,
517                                       struct gendisk *bd_disk, int data)
518 {
519         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
520 }
521
522 int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
523                    unsigned int cmd, void __user *arg)
524 {
525         int err;
526
527         if (!q || blk_get_queue(q))
528                 return -ENXIO;
529
530         switch (cmd) {
531                 /*
532                  * new sgv3 interface
533                  */
534                 case SG_GET_VERSION_NUM:
535                         err = sg_get_version(arg);
536                         break;
537                 case SCSI_IOCTL_GET_IDLUN:
538                         err = scsi_get_idlun(q, arg);
539                         break;
540                 case SCSI_IOCTL_GET_BUS_NUMBER:
541                         err = scsi_get_bus(q, arg);
542                         break;
543                 case SG_SET_TIMEOUT:
544                         err = sg_set_timeout(q, arg);
545                         break;
546                 case SG_GET_TIMEOUT:
547                         err = sg_get_timeout(q);
548                         break;
549                 case SG_GET_RESERVED_SIZE:
550                         err = sg_get_reserved_size(q, arg);
551                         break;
552                 case SG_SET_RESERVED_SIZE:
553                         err = sg_set_reserved_size(q, arg);
554                         break;
555                 case SG_EMULATED_HOST:
556                         err = sg_emulated_host(q, arg);
557                         break;
558                 case SG_IO: {
559                         struct sg_io_hdr hdr;
560
561                         err = -EFAULT;
562                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
563                                 break;
564                         err = sg_io(q, bd_disk, &hdr, mode);
565                         if (err == -EFAULT)
566                                 break;
567
568                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
569                                 err = -EFAULT;
570                         break;
571                 }
572                 case CDROM_SEND_PACKET: {
573                         struct cdrom_generic_command cgc;
574                         struct sg_io_hdr hdr;
575
576                         err = -EFAULT;
577                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
578                                 break;
579                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
580                         memset(&hdr, 0, sizeof(hdr));
581                         hdr.interface_id = 'S';
582                         hdr.cmd_len = sizeof(cgc.cmd);
583                         hdr.dxfer_len = cgc.buflen;
584                         err = 0;
585                         switch (cgc.data_direction) {
586                                 case CGC_DATA_UNKNOWN:
587                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
588                                         break;
589                                 case CGC_DATA_WRITE:
590                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
591                                         break;
592                                 case CGC_DATA_READ:
593                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
594                                         break;
595                                 case CGC_DATA_NONE:
596                                         hdr.dxfer_direction = SG_DXFER_NONE;
597                                         break;
598                                 default:
599                                         err = -EINVAL;
600                         }
601                         if (err)
602                                 break;
603
604                         hdr.dxferp = cgc.buffer;
605                         hdr.sbp = cgc.sense;
606                         if (hdr.sbp)
607                                 hdr.mx_sb_len = sizeof(struct request_sense);
608                         hdr.timeout = jiffies_to_msecs(cgc.timeout);
609                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
610                         hdr.cmd_len = sizeof(cgc.cmd);
611
612                         err = sg_io(q, bd_disk, &hdr, mode);
613                         if (err == -EFAULT)
614                                 break;
615
616                         if (hdr.status)
617                                 err = -EIO;
618
619                         cgc.stat = err;
620                         cgc.buflen = hdr.resid;
621                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
622                                 err = -EFAULT;
623
624                         break;
625                 }
626
627                 /*
628                  * old junk scsi send command ioctl
629                  */
630                 case SCSI_IOCTL_SEND_COMMAND:
631                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
632                         err = -EINVAL;
633                         if (!arg)
634                                 break;
635
636                         err = sg_scsi_ioctl(q, bd_disk, mode, arg);
637                         break;
638                 case CDROMCLOSETRAY:
639                         err = blk_send_start_stop(q, bd_disk, 0x03);
640                         break;
641                 case CDROMEJECT:
642                         err = blk_send_start_stop(q, bd_disk, 0x02);
643                         break;
644                 default:
645                         err = -ENOTTY;
646         }
647
648         blk_put_queue(q);
649         return err;
650 }
651
652 EXPORT_SYMBOL(scsi_cmd_ioctl);