block: no need to initialize rq->cmd with blk_get_request
[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[8] =
37 {
38         6, 10, 10, 12,
39         16, 12, 10, 10
40 };
41
42 EXPORT_SYMBOL(scsi_command_size);
43
44 #include <scsi/sg.h>
45
46 static int sg_get_version(int __user *p)
47 {
48         static const int sg_version_num = 30527;
49         return put_user(sg_version_num, p);
50 }
51
52 static int scsi_get_idlun(struct request_queue *q, int __user *p)
53 {
54         return put_user(0, p);
55 }
56
57 static int scsi_get_bus(struct request_queue *q, int __user *p)
58 {
59         return put_user(0, p);
60 }
61
62 static int sg_get_timeout(struct request_queue *q)
63 {
64         return q->sg_timeout / (HZ / USER_HZ);
65 }
66
67 static int sg_set_timeout(struct request_queue *q, int __user *p)
68 {
69         int timeout, err = get_user(timeout, p);
70
71         if (!err)
72                 q->sg_timeout = timeout * (HZ / USER_HZ);
73
74         return err;
75 }
76
77 static int sg_get_reserved_size(struct request_queue *q, int __user *p)
78 {
79         unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
80
81         return put_user(val, p);
82 }
83
84 static int sg_set_reserved_size(struct request_queue *q, int __user *p)
85 {
86         int size, err = get_user(size, p);
87
88         if (err)
89                 return err;
90
91         if (size < 0)
92                 return -EINVAL;
93         if (size > (q->max_sectors << 9))
94                 size = q->max_sectors << 9;
95
96         q->sg_reserved_size = size;
97         return 0;
98 }
99
100 /*
101  * will always return that we are ATAPI even for a real SCSI drive, I'm not
102  * so sure this is worth doing anything about (why would you care??)
103  */
104 static int sg_emulated_host(struct request_queue *q, int __user *p)
105 {
106         return put_user(1, p);
107 }
108
109 #define CMD_READ_SAFE   0x01
110 #define CMD_WRITE_SAFE  0x02
111 #define CMD_WARNED      0x04
112 #define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
113 #define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
114
115 int blk_verify_command(unsigned char *cmd, int has_write_perm)
116 {
117         static unsigned char cmd_type[256] = {
118
119                 /* Basic read-only commands */
120                 safe_for_read(TEST_UNIT_READY),
121                 safe_for_read(REQUEST_SENSE),
122                 safe_for_read(READ_6),
123                 safe_for_read(READ_10),
124                 safe_for_read(READ_12),
125                 safe_for_read(READ_16),
126                 safe_for_read(READ_BUFFER),
127                 safe_for_read(READ_DEFECT_DATA),
128                 safe_for_read(READ_LONG),
129                 safe_for_read(INQUIRY),
130                 safe_for_read(MODE_SENSE),
131                 safe_for_read(MODE_SENSE_10),
132                 safe_for_read(LOG_SENSE),
133                 safe_for_read(START_STOP),
134                 safe_for_read(GPCMD_VERIFY_10),
135                 safe_for_read(VERIFY_16),
136
137                 /* Audio CD commands */
138                 safe_for_read(GPCMD_PLAY_CD),
139                 safe_for_read(GPCMD_PLAY_AUDIO_10),
140                 safe_for_read(GPCMD_PLAY_AUDIO_MSF),
141                 safe_for_read(GPCMD_PLAY_AUDIO_TI),
142                 safe_for_read(GPCMD_PAUSE_RESUME),
143
144                 /* CD/DVD data reading */
145                 safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
146                 safe_for_read(GPCMD_READ_CD),
147                 safe_for_read(GPCMD_READ_CD_MSF),
148                 safe_for_read(GPCMD_READ_DISC_INFO),
149                 safe_for_read(GPCMD_READ_CDVD_CAPACITY),
150                 safe_for_read(GPCMD_READ_DVD_STRUCTURE),
151                 safe_for_read(GPCMD_READ_HEADER),
152                 safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
153                 safe_for_read(GPCMD_READ_SUBCHANNEL),
154                 safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
155                 safe_for_read(GPCMD_REPORT_KEY),
156                 safe_for_read(GPCMD_SCAN),
157                 safe_for_read(GPCMD_GET_CONFIGURATION),
158                 safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
159                 safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
160                 safe_for_read(GPCMD_GET_PERFORMANCE),
161                 safe_for_read(GPCMD_SEEK),
162                 safe_for_read(GPCMD_STOP_PLAY_SCAN),
163
164                 /* Basic writing commands */
165                 safe_for_write(WRITE_6),
166                 safe_for_write(WRITE_10),
167                 safe_for_write(WRITE_VERIFY),
168                 safe_for_write(WRITE_12),
169                 safe_for_write(WRITE_VERIFY_12),
170                 safe_for_write(WRITE_16),
171                 safe_for_write(WRITE_LONG),
172                 safe_for_write(WRITE_LONG_2),
173                 safe_for_write(ERASE),
174                 safe_for_write(GPCMD_MODE_SELECT_10),
175                 safe_for_write(MODE_SELECT),
176                 safe_for_write(LOG_SELECT),
177                 safe_for_write(GPCMD_BLANK),
178                 safe_for_write(GPCMD_CLOSE_TRACK),
179                 safe_for_write(GPCMD_FLUSH_CACHE),
180                 safe_for_write(GPCMD_FORMAT_UNIT),
181                 safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
182                 safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
183                 safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
184                 safe_for_write(GPCMD_SEND_EVENT),
185                 safe_for_write(GPCMD_SEND_KEY),
186                 safe_for_write(GPCMD_SEND_OPC),
187                 safe_for_write(GPCMD_SEND_CUE_SHEET),
188                 safe_for_write(GPCMD_SET_SPEED),
189                 safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
190                 safe_for_write(GPCMD_LOAD_UNLOAD),
191                 safe_for_write(GPCMD_SET_STREAMING),
192         };
193         unsigned char type = cmd_type[cmd[0]];
194
195         /* Anybody who can open the device can do a read-safe command */
196         if (type & CMD_READ_SAFE)
197                 return 0;
198
199         /* Write-safe commands just require a writable open.. */
200         if ((type & CMD_WRITE_SAFE) && has_write_perm)
201                 return 0;
202
203         /* And root can do any command.. */
204         if (capable(CAP_SYS_RAWIO))
205                 return 0;
206
207         if (!type) {
208                 cmd_type[cmd[0]] = CMD_WARNED;
209                 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
210         }
211
212         /* Otherwise fail it with an "Operation not permitted" */
213         return -EPERM;
214 }
215 EXPORT_SYMBOL_GPL(blk_verify_command);
216
217 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
218                              struct sg_io_hdr *hdr, int has_write_perm)
219 {
220         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
221                 return -EFAULT;
222         if (blk_verify_command(rq->cmd, has_write_perm))
223                 return -EPERM;
224
225         /*
226          * fill in request structure
227          */
228         rq->cmd_len = hdr->cmd_len;
229         rq->cmd_type = REQ_TYPE_BLOCK_PC;
230
231         rq->timeout = msecs_to_jiffies(hdr->timeout);
232         if (!rq->timeout)
233                 rq->timeout = q->sg_timeout;
234         if (!rq->timeout)
235                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
236
237         return 0;
238 }
239
240 /*
241  * unmap a request that was previously mapped to this sg_io_hdr. handles
242  * both sg and non-sg sg_io_hdr.
243  */
244 static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
245 {
246         blk_rq_unmap_user(rq->bio);
247         blk_put_request(rq);
248         return 0;
249 }
250
251 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
252                                  struct bio *bio)
253 {
254         int r, ret = 0;
255
256         /*
257          * fill in all the output members
258          */
259         hdr->status = rq->errors & 0xff;
260         hdr->masked_status = status_byte(rq->errors);
261         hdr->msg_status = msg_byte(rq->errors);
262         hdr->host_status = host_byte(rq->errors);
263         hdr->driver_status = driver_byte(rq->errors);
264         hdr->info = 0;
265         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
266                 hdr->info |= SG_INFO_CHECK;
267         hdr->resid = rq->data_len;
268         hdr->sb_len_wr = 0;
269
270         if (rq->sense_len && hdr->sbp) {
271                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
272
273                 if (!copy_to_user(hdr->sbp, rq->sense, len))
274                         hdr->sb_len_wr = len;
275                 else
276                         ret = -EFAULT;
277         }
278
279         rq->bio = bio;
280         r = blk_unmap_sghdr_rq(rq, hdr);
281         if (ret)
282                 r = ret;
283
284         return r;
285 }
286
287 static int sg_io(struct file *file, struct request_queue *q,
288                 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
289 {
290         unsigned long start_time;
291         int writing = 0, ret = 0, has_write_perm = 0;
292         struct request *rq;
293         char sense[SCSI_SENSE_BUFFERSIZE];
294         struct bio *bio;
295
296         if (hdr->interface_id != 'S')
297                 return -EINVAL;
298         if (hdr->cmd_len > BLK_MAX_CDB)
299                 return -EINVAL;
300
301         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
302                 return -EIO;
303
304         if (hdr->dxfer_len)
305                 switch (hdr->dxfer_direction) {
306                 default:
307                         return -EINVAL;
308                 case SG_DXFER_TO_DEV:
309                         writing = 1;
310                         break;
311                 case SG_DXFER_TO_FROM_DEV:
312                 case SG_DXFER_FROM_DEV:
313                         break;
314                 }
315
316         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
317         if (!rq)
318                 return -ENOMEM;
319
320         if (file)
321                 has_write_perm = file->f_mode & FMODE_WRITE;
322
323         if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) {
324                 blk_put_request(rq);
325                 return -EFAULT;
326         }
327
328         if (hdr->iovec_count) {
329                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
330                 struct sg_iovec *iov;
331
332                 iov = kmalloc(size, GFP_KERNEL);
333                 if (!iov) {
334                         ret = -ENOMEM;
335                         goto out;
336                 }
337
338                 if (copy_from_user(iov, hdr->dxferp, size)) {
339                         kfree(iov);
340                         ret = -EFAULT;
341                         goto out;
342                 }
343
344                 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
345                                           hdr->dxfer_len);
346                 kfree(iov);
347         } else if (hdr->dxfer_len)
348                 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
349
350         if (ret)
351                 goto out;
352
353         bio = rq->bio;
354         memset(sense, 0, sizeof(sense));
355         rq->sense = sense;
356         rq->sense_len = 0;
357         rq->retries = 0;
358
359         start_time = jiffies;
360
361         /* ignore return value. All information is passed back to caller
362          * (if he doesn't check that is his problem).
363          * N.B. a non-zero SCSI status is _not_ necessarily an error.
364          */
365         blk_execute_rq(q, bd_disk, rq, 0);
366
367         hdr->duration = jiffies_to_msecs(jiffies - start_time);
368
369         return blk_complete_sghdr_rq(rq, hdr, bio);
370 out:
371         blk_put_request(rq);
372         return ret;
373 }
374
375 /**
376  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
377  * @file:       file this ioctl operates on (optional)
378  * @q:          request queue to send scsi commands down
379  * @disk:       gendisk to operate on (option)
380  * @sic:        userspace structure describing the command to perform
381  *
382  * Send down the scsi command described by @sic to the device below
383  * the request queue @q.  If @file is non-NULL it's used to perform
384  * fine-grained permission checks that allow users to send down
385  * non-destructive SCSI commands.  If the caller has a struct gendisk
386  * available it should be passed in as @disk to allow the low level
387  * driver to use the information contained in it.  A non-NULL @disk
388  * is only allowed if the caller knows that the low level driver doesn't
389  * need it (e.g. in the scsi subsystem).
390  *
391  * Notes:
392  *   -  This interface is deprecated - users should use the SG_IO
393  *      interface instead, as this is a more flexible approach to
394  *      performing SCSI commands on a device.
395  *   -  The SCSI command length is determined by examining the 1st byte
396  *      of the given command. There is no way to override this.
397  *   -  Data transfers are limited to PAGE_SIZE
398  *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
399  *      accommodate the sense buffer when an error occurs.
400  *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
401  *      old code will not be surprised.
402  *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
403  *      a negative return and the Unix error code in 'errno'.
404  *      If the SCSI command succeeds then 0 is returned.
405  *      Positive numbers returned are the compacted SCSI error codes (4
406  *      bytes in one int) where the lowest byte is the SCSI status.
407  */
408 #define OMAX_SB_LEN 16          /* For backward compatibility */
409 int sg_scsi_ioctl(struct file *file, struct request_queue *q,
410                   struct gendisk *disk, struct scsi_ioctl_command __user *sic)
411 {
412         struct request *rq;
413         int err;
414         unsigned int in_len, out_len, bytes, opcode, cmdlen;
415         char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
416
417         if (!sic)
418                 return -EINVAL;
419
420         /*
421          * get in an out lengths, verify they don't exceed a page worth of data
422          */
423         if (get_user(in_len, &sic->inlen))
424                 return -EFAULT;
425         if (get_user(out_len, &sic->outlen))
426                 return -EFAULT;
427         if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
428                 return -EINVAL;
429         if (get_user(opcode, sic->data))
430                 return -EFAULT;
431
432         bytes = max(in_len, out_len);
433         if (bytes) {
434                 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
435                 if (!buffer)
436                         return -ENOMEM;
437
438         }
439
440         rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
441
442         cmdlen = COMMAND_SIZE(opcode);
443
444         /*
445          * get command and data to send to device, if any
446          */
447         err = -EFAULT;
448         rq->cmd_len = cmdlen;
449         if (copy_from_user(rq->cmd, sic->data, cmdlen))
450                 goto error;
451
452         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
453                 goto error;
454
455         err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
456         if (err)
457                 goto error;
458
459         /* default.  possible overriden later */
460         rq->retries = 5;
461
462         switch (opcode) {
463         case SEND_DIAGNOSTIC:
464         case FORMAT_UNIT:
465                 rq->timeout = FORMAT_UNIT_TIMEOUT;
466                 rq->retries = 1;
467                 break;
468         case START_STOP:
469                 rq->timeout = START_STOP_TIMEOUT;
470                 break;
471         case MOVE_MEDIUM:
472                 rq->timeout = MOVE_MEDIUM_TIMEOUT;
473                 break;
474         case READ_ELEMENT_STATUS:
475                 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
476                 break;
477         case READ_DEFECT_DATA:
478                 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
479                 rq->retries = 1;
480                 break;
481         default:
482                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
483                 break;
484         }
485
486         if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
487                 err = DRIVER_ERROR << 24;
488                 goto out;
489         }
490
491         memset(sense, 0, sizeof(sense));
492         rq->sense = sense;
493         rq->sense_len = 0;
494         rq->cmd_type = REQ_TYPE_BLOCK_PC;
495
496         blk_execute_rq(q, disk, rq, 0);
497
498 out:
499         err = rq->errors & 0xff;        /* only 8 bit SCSI status */
500         if (err) {
501                 if (rq->sense_len && rq->sense) {
502                         bytes = (OMAX_SB_LEN > rq->sense_len) ?
503                                 rq->sense_len : OMAX_SB_LEN;
504                         if (copy_to_user(sic->data, rq->sense, bytes))
505                                 err = -EFAULT;
506                 }
507         } else {
508                 if (copy_to_user(sic->data, buffer, out_len))
509                         err = -EFAULT;
510         }
511         
512 error:
513         kfree(buffer);
514         blk_put_request(rq);
515         return err;
516 }
517 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
518
519 /* Send basic block requests */
520 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
521                               int cmd, int data)
522 {
523         struct request *rq;
524         int err;
525
526         rq = blk_get_request(q, WRITE, __GFP_WAIT);
527         rq->cmd_type = REQ_TYPE_BLOCK_PC;
528         rq->data = NULL;
529         rq->data_len = 0;
530         rq->extra_len = 0;
531         rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
532         rq->cmd[0] = cmd;
533         rq->cmd[4] = data;
534         rq->cmd_len = 6;
535         err = blk_execute_rq(q, bd_disk, rq, 0);
536         blk_put_request(rq);
537
538         return err;
539 }
540
541 static inline int blk_send_start_stop(struct request_queue *q,
542                                       struct gendisk *bd_disk, int data)
543 {
544         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
545 }
546
547 int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
548                    struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
549 {
550         int err;
551
552         if (!q || blk_get_queue(q))
553                 return -ENXIO;
554
555         switch (cmd) {
556                 /*
557                  * new sgv3 interface
558                  */
559                 case SG_GET_VERSION_NUM:
560                         err = sg_get_version(arg);
561                         break;
562                 case SCSI_IOCTL_GET_IDLUN:
563                         err = scsi_get_idlun(q, arg);
564                         break;
565                 case SCSI_IOCTL_GET_BUS_NUMBER:
566                         err = scsi_get_bus(q, arg);
567                         break;
568                 case SG_SET_TIMEOUT:
569                         err = sg_set_timeout(q, arg);
570                         break;
571                 case SG_GET_TIMEOUT:
572                         err = sg_get_timeout(q);
573                         break;
574                 case SG_GET_RESERVED_SIZE:
575                         err = sg_get_reserved_size(q, arg);
576                         break;
577                 case SG_SET_RESERVED_SIZE:
578                         err = sg_set_reserved_size(q, arg);
579                         break;
580                 case SG_EMULATED_HOST:
581                         err = sg_emulated_host(q, arg);
582                         break;
583                 case SG_IO: {
584                         struct sg_io_hdr hdr;
585
586                         err = -EFAULT;
587                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
588                                 break;
589                         err = sg_io(file, q, bd_disk, &hdr);
590                         if (err == -EFAULT)
591                                 break;
592
593                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
594                                 err = -EFAULT;
595                         break;
596                 }
597                 case CDROM_SEND_PACKET: {
598                         struct cdrom_generic_command cgc;
599                         struct sg_io_hdr hdr;
600
601                         err = -EFAULT;
602                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
603                                 break;
604                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
605                         memset(&hdr, 0, sizeof(hdr));
606                         hdr.interface_id = 'S';
607                         hdr.cmd_len = sizeof(cgc.cmd);
608                         hdr.dxfer_len = cgc.buflen;
609                         err = 0;
610                         switch (cgc.data_direction) {
611                                 case CGC_DATA_UNKNOWN:
612                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
613                                         break;
614                                 case CGC_DATA_WRITE:
615                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
616                                         break;
617                                 case CGC_DATA_READ:
618                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
619                                         break;
620                                 case CGC_DATA_NONE:
621                                         hdr.dxfer_direction = SG_DXFER_NONE;
622                                         break;
623                                 default:
624                                         err = -EINVAL;
625                         }
626                         if (err)
627                                 break;
628
629                         hdr.dxferp = cgc.buffer;
630                         hdr.sbp = cgc.sense;
631                         if (hdr.sbp)
632                                 hdr.mx_sb_len = sizeof(struct request_sense);
633                         hdr.timeout = cgc.timeout;
634                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
635                         hdr.cmd_len = sizeof(cgc.cmd);
636
637                         err = sg_io(file, q, bd_disk, &hdr);
638                         if (err == -EFAULT)
639                                 break;
640
641                         if (hdr.status)
642                                 err = -EIO;
643
644                         cgc.stat = err;
645                         cgc.buflen = hdr.resid;
646                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
647                                 err = -EFAULT;
648
649                         break;
650                 }
651
652                 /*
653                  * old junk scsi send command ioctl
654                  */
655                 case SCSI_IOCTL_SEND_COMMAND:
656                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
657                         err = -EINVAL;
658                         if (!arg)
659                                 break;
660
661                         err = sg_scsi_ioctl(file, q, bd_disk, arg);
662                         break;
663                 case CDROMCLOSETRAY:
664                         err = blk_send_start_stop(q, bd_disk, 0x03);
665                         break;
666                 case CDROMEJECT:
667                         err = blk_send_start_stop(q, bd_disk, 0x02);
668                         break;
669                 default:
670                         err = -ENOTTY;
671         }
672
673         blk_put_queue(q);
674         return err;
675 }
676
677 EXPORT_SYMBOL(scsi_cmd_ioctl);