78199c08ec92fc7c23549ef41c7d5b0862cfb938
[linux-3.10.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 q->sg_timeout / (HZ / USER_HZ);
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 = timeout * (HZ / USER_HZ);
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 #define CMD_READ_SAFE   0x01
109 #define CMD_WRITE_SAFE  0x02
110 #define CMD_WARNED      0x04
111 #define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
112 #define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
113
114 int blk_verify_command(unsigned char *cmd, int has_write_perm)
115 {
116         static unsigned char cmd_type[256] = {
117
118                 /* Basic read-only commands */
119                 safe_for_read(TEST_UNIT_READY),
120                 safe_for_read(REQUEST_SENSE),
121                 safe_for_read(READ_6),
122                 safe_for_read(READ_10),
123                 safe_for_read(READ_12),
124                 safe_for_read(READ_16),
125                 safe_for_read(READ_BUFFER),
126                 safe_for_read(READ_DEFECT_DATA),
127                 safe_for_read(READ_LONG),
128                 safe_for_read(INQUIRY),
129                 safe_for_read(MODE_SENSE),
130                 safe_for_read(MODE_SENSE_10),
131                 safe_for_read(LOG_SENSE),
132                 safe_for_read(START_STOP),
133                 safe_for_read(GPCMD_VERIFY_10),
134                 safe_for_read(VERIFY_16),
135
136                 /* Audio CD commands */
137                 safe_for_read(GPCMD_PLAY_CD),
138                 safe_for_read(GPCMD_PLAY_AUDIO_10),
139                 safe_for_read(GPCMD_PLAY_AUDIO_MSF),
140                 safe_for_read(GPCMD_PLAY_AUDIO_TI),
141                 safe_for_read(GPCMD_PAUSE_RESUME),
142
143                 /* CD/DVD data reading */
144                 safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
145                 safe_for_read(GPCMD_READ_CD),
146                 safe_for_read(GPCMD_READ_CD_MSF),
147                 safe_for_read(GPCMD_READ_DISC_INFO),
148                 safe_for_read(GPCMD_READ_CDVD_CAPACITY),
149                 safe_for_read(GPCMD_READ_DVD_STRUCTURE),
150                 safe_for_read(GPCMD_READ_HEADER),
151                 safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
152                 safe_for_read(GPCMD_READ_SUBCHANNEL),
153                 safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
154                 safe_for_read(GPCMD_REPORT_KEY),
155                 safe_for_read(GPCMD_SCAN),
156                 safe_for_read(GPCMD_GET_CONFIGURATION),
157                 safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
158                 safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
159                 safe_for_read(GPCMD_GET_PERFORMANCE),
160                 safe_for_read(GPCMD_SEEK),
161                 safe_for_read(GPCMD_STOP_PLAY_SCAN),
162
163                 /* Basic writing commands */
164                 safe_for_write(WRITE_6),
165                 safe_for_write(WRITE_10),
166                 safe_for_write(WRITE_VERIFY),
167                 safe_for_write(WRITE_12),
168                 safe_for_write(WRITE_VERIFY_12),
169                 safe_for_write(WRITE_16),
170                 safe_for_write(WRITE_LONG),
171                 safe_for_write(WRITE_LONG_2),
172                 safe_for_write(ERASE),
173                 safe_for_write(GPCMD_MODE_SELECT_10),
174                 safe_for_write(MODE_SELECT),
175                 safe_for_write(LOG_SELECT),
176                 safe_for_write(GPCMD_BLANK),
177                 safe_for_write(GPCMD_CLOSE_TRACK),
178                 safe_for_write(GPCMD_FLUSH_CACHE),
179                 safe_for_write(GPCMD_FORMAT_UNIT),
180                 safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
181                 safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
182                 safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
183                 safe_for_write(GPCMD_SEND_EVENT),
184                 safe_for_write(GPCMD_SEND_KEY),
185                 safe_for_write(GPCMD_SEND_OPC),
186                 safe_for_write(GPCMD_SEND_CUE_SHEET),
187                 safe_for_write(GPCMD_SET_SPEED),
188                 safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
189                 safe_for_write(GPCMD_LOAD_UNLOAD),
190                 safe_for_write(GPCMD_SET_STREAMING),
191         };
192         unsigned char type = cmd_type[cmd[0]];
193
194         /* Anybody who can open the device can do a read-safe command */
195         if (type & CMD_READ_SAFE)
196                 return 0;
197
198         /* Write-safe commands just require a writable open.. */
199         if ((type & CMD_WRITE_SAFE) && has_write_perm)
200                 return 0;
201
202         /* And root can do any command.. */
203         if (capable(CAP_SYS_RAWIO))
204                 return 0;
205
206         if (!type) {
207                 cmd_type[cmd[0]] = CMD_WARNED;
208                 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
209         }
210
211         /* Otherwise fail it with an "Operation not permitted" */
212         return -EPERM;
213 }
214 EXPORT_SYMBOL_GPL(blk_verify_command);
215
216 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
217                              struct sg_io_hdr *hdr, int has_write_perm)
218 {
219         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
220                 return -EFAULT;
221         if (blk_verify_command(rq->cmd, has_write_perm))
222                 return -EPERM;
223
224         /*
225          * fill in request structure
226          */
227         rq->cmd_len = hdr->cmd_len;
228         rq->cmd_type = REQ_TYPE_BLOCK_PC;
229
230         rq->timeout = msecs_to_jiffies(hdr->timeout);
231         if (!rq->timeout)
232                 rq->timeout = q->sg_timeout;
233         if (!rq->timeout)
234                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
235
236         return 0;
237 }
238
239 /*
240  * unmap a request that was previously mapped to this sg_io_hdr. handles
241  * both sg and non-sg sg_io_hdr.
242  */
243 static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
244 {
245         blk_rq_unmap_user(rq->bio);
246         blk_put_request(rq);
247         return 0;
248 }
249
250 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
251                                  struct bio *bio)
252 {
253         int r, ret = 0;
254
255         /*
256          * fill in all the output members
257          */
258         hdr->status = rq->errors & 0xff;
259         hdr->masked_status = status_byte(rq->errors);
260         hdr->msg_status = msg_byte(rq->errors);
261         hdr->host_status = host_byte(rq->errors);
262         hdr->driver_status = driver_byte(rq->errors);
263         hdr->info = 0;
264         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
265                 hdr->info |= SG_INFO_CHECK;
266         hdr->resid = rq->data_len;
267         hdr->sb_len_wr = 0;
268
269         if (rq->sense_len && hdr->sbp) {
270                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
271
272                 if (!copy_to_user(hdr->sbp, rq->sense, len))
273                         hdr->sb_len_wr = len;
274                 else
275                         ret = -EFAULT;
276         }
277
278         rq->bio = bio;
279         r = blk_unmap_sghdr_rq(rq, hdr);
280         if (ret)
281                 r = ret;
282
283         return r;
284 }
285
286 static int sg_io(struct file *file, struct request_queue *q,
287                 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
288 {
289         unsigned long start_time;
290         int writing = 0, ret = 0, has_write_perm = 0;
291         struct request *rq;
292         char sense[SCSI_SENSE_BUFFERSIZE];
293         struct bio *bio;
294
295         if (hdr->interface_id != 'S')
296                 return -EINVAL;
297         if (hdr->cmd_len > BLK_MAX_CDB)
298                 return -EINVAL;
299
300         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
301                 return -EIO;
302
303         if (hdr->dxfer_len)
304                 switch (hdr->dxfer_direction) {
305                 default:
306                         return -EINVAL;
307                 case SG_DXFER_TO_DEV:
308                         writing = 1;
309                         break;
310                 case SG_DXFER_TO_FROM_DEV:
311                 case SG_DXFER_FROM_DEV:
312                         break;
313                 }
314
315         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
316         if (!rq)
317                 return -ENOMEM;
318
319         if (file)
320                 has_write_perm = file->f_mode & FMODE_WRITE;
321
322         if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) {
323                 blk_put_request(rq);
324                 return -EFAULT;
325         }
326
327         if (hdr->iovec_count) {
328                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
329                 struct sg_iovec *iov;
330
331                 iov = kmalloc(size, GFP_KERNEL);
332                 if (!iov) {
333                         ret = -ENOMEM;
334                         goto out;
335                 }
336
337                 if (copy_from_user(iov, hdr->dxferp, size)) {
338                         kfree(iov);
339                         ret = -EFAULT;
340                         goto out;
341                 }
342
343                 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
344                                           hdr->dxfer_len);
345                 kfree(iov);
346         } else if (hdr->dxfer_len)
347                 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
348
349         if (ret)
350                 goto out;
351
352         bio = rq->bio;
353         memset(sense, 0, sizeof(sense));
354         rq->sense = sense;
355         rq->sense_len = 0;
356         rq->retries = 0;
357
358         start_time = jiffies;
359
360         /* ignore return value. All information is passed back to caller
361          * (if he doesn't check that is his problem).
362          * N.B. a non-zero SCSI status is _not_ necessarily an error.
363          */
364         blk_execute_rq(q, bd_disk, rq, 0);
365
366         hdr->duration = jiffies_to_msecs(jiffies - start_time);
367
368         return blk_complete_sghdr_rq(rq, hdr, bio);
369 out:
370         blk_put_request(rq);
371         return ret;
372 }
373
374 /**
375  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
376  * @file:       file this ioctl operates on (optional)
377  * @q:          request queue to send scsi commands down
378  * @disk:       gendisk to operate on (option)
379  * @sic:        userspace structure describing the command to perform
380  *
381  * Send down the scsi command described by @sic to the device below
382  * the request queue @q.  If @file is non-NULL it's used to perform
383  * fine-grained permission checks that allow users to send down
384  * non-destructive SCSI commands.  If the caller has a struct gendisk
385  * available it should be passed in as @disk to allow the low level
386  * driver to use the information contained in it.  A non-NULL @disk
387  * is only allowed if the caller knows that the low level driver doesn't
388  * need it (e.g. in the scsi subsystem).
389  *
390  * Notes:
391  *   -  This interface is deprecated - users should use the SG_IO
392  *      interface instead, as this is a more flexible approach to
393  *      performing SCSI commands on a device.
394  *   -  The SCSI command length is determined by examining the 1st byte
395  *      of the given command. There is no way to override this.
396  *   -  Data transfers are limited to PAGE_SIZE
397  *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
398  *      accommodate the sense buffer when an error occurs.
399  *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
400  *      old code will not be surprised.
401  *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
402  *      a negative return and the Unix error code in 'errno'.
403  *      If the SCSI command succeeds then 0 is returned.
404  *      Positive numbers returned are the compacted SCSI error codes (4
405  *      bytes in one int) where the lowest byte is the SCSI status.
406  */
407 #define OMAX_SB_LEN 16          /* For backward compatibility */
408 int sg_scsi_ioctl(struct file *file, struct request_queue *q,
409                   struct gendisk *disk, struct scsi_ioctl_command __user *sic)
410 {
411         struct request *rq;
412         int err;
413         unsigned int in_len, out_len, bytes, opcode, cmdlen;
414         char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
415
416         if (!sic)
417                 return -EINVAL;
418
419         /*
420          * get in an out lengths, verify they don't exceed a page worth of data
421          */
422         if (get_user(in_len, &sic->inlen))
423                 return -EFAULT;
424         if (get_user(out_len, &sic->outlen))
425                 return -EFAULT;
426         if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
427                 return -EINVAL;
428         if (get_user(opcode, sic->data))
429                 return -EFAULT;
430
431         bytes = max(in_len, out_len);
432         if (bytes) {
433                 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
434                 if (!buffer)
435                         return -ENOMEM;
436
437         }
438
439         rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
440
441         cmdlen = COMMAND_SIZE(opcode);
442
443         /*
444          * get command and data to send to device, if any
445          */
446         err = -EFAULT;
447         rq->cmd_len = cmdlen;
448         if (copy_from_user(rq->cmd, sic->data, cmdlen))
449                 goto error;
450
451         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
452                 goto error;
453
454         err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
455         if (err)
456                 goto error;
457
458         /* default.  possible overriden later */
459         rq->retries = 5;
460
461         switch (opcode) {
462         case SEND_DIAGNOSTIC:
463         case FORMAT_UNIT:
464                 rq->timeout = FORMAT_UNIT_TIMEOUT;
465                 rq->retries = 1;
466                 break;
467         case START_STOP:
468                 rq->timeout = START_STOP_TIMEOUT;
469                 break;
470         case MOVE_MEDIUM:
471                 rq->timeout = MOVE_MEDIUM_TIMEOUT;
472                 break;
473         case READ_ELEMENT_STATUS:
474                 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
475                 break;
476         case READ_DEFECT_DATA:
477                 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
478                 rq->retries = 1;
479                 break;
480         default:
481                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
482                 break;
483         }
484
485         if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
486                 err = DRIVER_ERROR << 24;
487                 goto out;
488         }
489
490         memset(sense, 0, sizeof(sense));
491         rq->sense = sense;
492         rq->sense_len = 0;
493         rq->cmd_type = REQ_TYPE_BLOCK_PC;
494
495         blk_execute_rq(q, disk, rq, 0);
496
497 out:
498         err = rq->errors & 0xff;        /* only 8 bit SCSI status */
499         if (err) {
500                 if (rq->sense_len && rq->sense) {
501                         bytes = (OMAX_SB_LEN > rq->sense_len) ?
502                                 rq->sense_len : OMAX_SB_LEN;
503                         if (copy_to_user(sic->data, rq->sense, bytes))
504                                 err = -EFAULT;
505                 }
506         } else {
507                 if (copy_to_user(sic->data, buffer, out_len))
508                         err = -EFAULT;
509         }
510         
511 error:
512         kfree(buffer);
513         blk_put_request(rq);
514         return err;
515 }
516 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
517
518 /* Send basic block requests */
519 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
520                               int cmd, int data)
521 {
522         struct request *rq;
523         int err;
524
525         rq = blk_get_request(q, WRITE, __GFP_WAIT);
526         rq->cmd_type = REQ_TYPE_BLOCK_PC;
527         rq->data = NULL;
528         rq->data_len = 0;
529         rq->extra_len = 0;
530         rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
531         rq->cmd[0] = cmd;
532         rq->cmd[4] = data;
533         rq->cmd_len = 6;
534         err = blk_execute_rq(q, bd_disk, rq, 0);
535         blk_put_request(rq);
536
537         return err;
538 }
539
540 static inline int blk_send_start_stop(struct request_queue *q,
541                                       struct gendisk *bd_disk, int data)
542 {
543         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
544 }
545
546 int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
547                    struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
548 {
549         int err;
550
551         if (!q || blk_get_queue(q))
552                 return -ENXIO;
553
554         switch (cmd) {
555                 /*
556                  * new sgv3 interface
557                  */
558                 case SG_GET_VERSION_NUM:
559                         err = sg_get_version(arg);
560                         break;
561                 case SCSI_IOCTL_GET_IDLUN:
562                         err = scsi_get_idlun(q, arg);
563                         break;
564                 case SCSI_IOCTL_GET_BUS_NUMBER:
565                         err = scsi_get_bus(q, arg);
566                         break;
567                 case SG_SET_TIMEOUT:
568                         err = sg_set_timeout(q, arg);
569                         break;
570                 case SG_GET_TIMEOUT:
571                         err = sg_get_timeout(q);
572                         break;
573                 case SG_GET_RESERVED_SIZE:
574                         err = sg_get_reserved_size(q, arg);
575                         break;
576                 case SG_SET_RESERVED_SIZE:
577                         err = sg_set_reserved_size(q, arg);
578                         break;
579                 case SG_EMULATED_HOST:
580                         err = sg_emulated_host(q, arg);
581                         break;
582                 case SG_IO: {
583                         struct sg_io_hdr hdr;
584
585                         err = -EFAULT;
586                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
587                                 break;
588                         err = sg_io(file, q, bd_disk, &hdr);
589                         if (err == -EFAULT)
590                                 break;
591
592                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
593                                 err = -EFAULT;
594                         break;
595                 }
596                 case CDROM_SEND_PACKET: {
597                         struct cdrom_generic_command cgc;
598                         struct sg_io_hdr hdr;
599
600                         err = -EFAULT;
601                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
602                                 break;
603                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
604                         memset(&hdr, 0, sizeof(hdr));
605                         hdr.interface_id = 'S';
606                         hdr.cmd_len = sizeof(cgc.cmd);
607                         hdr.dxfer_len = cgc.buflen;
608                         err = 0;
609                         switch (cgc.data_direction) {
610                                 case CGC_DATA_UNKNOWN:
611                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
612                                         break;
613                                 case CGC_DATA_WRITE:
614                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
615                                         break;
616                                 case CGC_DATA_READ:
617                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
618                                         break;
619                                 case CGC_DATA_NONE:
620                                         hdr.dxfer_direction = SG_DXFER_NONE;
621                                         break;
622                                 default:
623                                         err = -EINVAL;
624                         }
625                         if (err)
626                                 break;
627
628                         hdr.dxferp = cgc.buffer;
629                         hdr.sbp = cgc.sense;
630                         if (hdr.sbp)
631                                 hdr.mx_sb_len = sizeof(struct request_sense);
632                         hdr.timeout = cgc.timeout;
633                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
634                         hdr.cmd_len = sizeof(cgc.cmd);
635
636                         err = sg_io(file, q, bd_disk, &hdr);
637                         if (err == -EFAULT)
638                                 break;
639
640                         if (hdr.status)
641                                 err = -EIO;
642
643                         cgc.stat = err;
644                         cgc.buflen = hdr.resid;
645                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
646                                 err = -EFAULT;
647
648                         break;
649                 }
650
651                 /*
652                  * old junk scsi send command ioctl
653                  */
654                 case SCSI_IOCTL_SEND_COMMAND:
655                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
656                         err = -EINVAL;
657                         if (!arg)
658                                 break;
659
660                         err = sg_scsi_ioctl(file, q, bd_disk, arg);
661                         break;
662                 case CDROMCLOSETRAY:
663                         err = blk_send_start_stop(q, bd_disk, 0x03);
664                         break;
665                 case CDROMEJECT:
666                         err = blk_send_start_stop(q, bd_disk, 0x02);
667                         break;
668                 default:
669                         err = -ENOTTY;
670         }
671
672         blk_put_queue(q);
673         return err;
674 }
675
676 EXPORT_SYMBOL(scsi_cmd_ioctl);