[SCSI] sg: cap reserved_size values at max_sectors
[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 #define BLK_DEFAULT_TIMEOUT     (60 * HZ)
45
46 #include <scsi/sg.h>
47
48 static int sg_get_version(int __user *p)
49 {
50         static const int sg_version_num = 30527;
51         return put_user(sg_version_num, p);
52 }
53
54 static int scsi_get_idlun(request_queue_t *q, int __user *p)
55 {
56         return put_user(0, p);
57 }
58
59 static int scsi_get_bus(request_queue_t *q, int __user *p)
60 {
61         return put_user(0, p);
62 }
63
64 static int sg_get_timeout(request_queue_t *q)
65 {
66         return q->sg_timeout / (HZ / USER_HZ);
67 }
68
69 static int sg_set_timeout(request_queue_t *q, int __user *p)
70 {
71         int timeout, err = get_user(timeout, p);
72
73         if (!err)
74                 q->sg_timeout = timeout * (HZ / USER_HZ);
75
76         return err;
77 }
78
79 static int sg_get_reserved_size(request_queue_t *q, int __user *p)
80 {
81         unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
82
83         return put_user(val, p);
84 }
85
86 static int sg_set_reserved_size(request_queue_t *q, int __user *p)
87 {
88         int size, err = get_user(size, p);
89
90         if (err)
91                 return err;
92
93         if (size < 0)
94                 return -EINVAL;
95         if (size > (q->max_sectors << 9))
96                 size = q->max_sectors << 9;
97
98         q->sg_reserved_size = size;
99         return 0;
100 }
101
102 /*
103  * will always return that we are ATAPI even for a real SCSI drive, I'm not
104  * so sure this is worth doing anything about (why would you care??)
105  */
106 static int sg_emulated_host(request_queue_t *q, int __user *p)
107 {
108         return put_user(1, p);
109 }
110
111 #define CMD_READ_SAFE   0x01
112 #define CMD_WRITE_SAFE  0x02
113 #define CMD_WARNED      0x04
114 #define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
115 #define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
116
117 static int verify_command(struct file *file, unsigned char *cmd)
118 {
119         static unsigned char cmd_type[256] = {
120
121                 /* Basic read-only commands */
122                 safe_for_read(TEST_UNIT_READY),
123                 safe_for_read(REQUEST_SENSE),
124                 safe_for_read(READ_6),
125                 safe_for_read(READ_10),
126                 safe_for_read(READ_12),
127                 safe_for_read(READ_16),
128                 safe_for_read(READ_BUFFER),
129                 safe_for_read(READ_DEFECT_DATA),
130                 safe_for_read(READ_LONG),
131                 safe_for_read(INQUIRY),
132                 safe_for_read(MODE_SENSE),
133                 safe_for_read(MODE_SENSE_10),
134                 safe_for_read(LOG_SENSE),
135                 safe_for_read(START_STOP),
136                 safe_for_read(GPCMD_VERIFY_10),
137                 safe_for_read(VERIFY_16),
138
139                 /* Audio CD commands */
140                 safe_for_read(GPCMD_PLAY_CD),
141                 safe_for_read(GPCMD_PLAY_AUDIO_10),
142                 safe_for_read(GPCMD_PLAY_AUDIO_MSF),
143                 safe_for_read(GPCMD_PLAY_AUDIO_TI),
144                 safe_for_read(GPCMD_PAUSE_RESUME),
145
146                 /* CD/DVD data reading */
147                 safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
148                 safe_for_read(GPCMD_READ_CD),
149                 safe_for_read(GPCMD_READ_CD_MSF),
150                 safe_for_read(GPCMD_READ_DISC_INFO),
151                 safe_for_read(GPCMD_READ_CDVD_CAPACITY),
152                 safe_for_read(GPCMD_READ_DVD_STRUCTURE),
153                 safe_for_read(GPCMD_READ_HEADER),
154                 safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
155                 safe_for_read(GPCMD_READ_SUBCHANNEL),
156                 safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
157                 safe_for_read(GPCMD_REPORT_KEY),
158                 safe_for_read(GPCMD_SCAN),
159                 safe_for_read(GPCMD_GET_CONFIGURATION),
160                 safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
161                 safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
162                 safe_for_read(GPCMD_GET_PERFORMANCE),
163                 safe_for_read(GPCMD_SEEK),
164                 safe_for_read(GPCMD_STOP_PLAY_SCAN),
165
166                 /* Basic writing commands */
167                 safe_for_write(WRITE_6),
168                 safe_for_write(WRITE_10),
169                 safe_for_write(WRITE_VERIFY),
170                 safe_for_write(WRITE_12),
171                 safe_for_write(WRITE_VERIFY_12),
172                 safe_for_write(WRITE_16),
173                 safe_for_write(WRITE_LONG),
174                 safe_for_write(WRITE_LONG_2),
175                 safe_for_write(ERASE),
176                 safe_for_write(GPCMD_MODE_SELECT_10),
177                 safe_for_write(MODE_SELECT),
178                 safe_for_write(LOG_SELECT),
179                 safe_for_write(GPCMD_BLANK),
180                 safe_for_write(GPCMD_CLOSE_TRACK),
181                 safe_for_write(GPCMD_FLUSH_CACHE),
182                 safe_for_write(GPCMD_FORMAT_UNIT),
183                 safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
184                 safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
185                 safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
186                 safe_for_write(GPCMD_SEND_EVENT),
187                 safe_for_write(GPCMD_SEND_KEY),
188                 safe_for_write(GPCMD_SEND_OPC),
189                 safe_for_write(GPCMD_SEND_CUE_SHEET),
190                 safe_for_write(GPCMD_SET_SPEED),
191                 safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
192                 safe_for_write(GPCMD_LOAD_UNLOAD),
193                 safe_for_write(GPCMD_SET_STREAMING),
194         };
195         unsigned char type = cmd_type[cmd[0]];
196         int has_write_perm = 0;
197
198         /* Anybody who can open the device can do a read-safe command */
199         if (type & CMD_READ_SAFE)
200                 return 0;
201
202         /*
203          * file can be NULL from ioctl_by_bdev()...
204          */
205         if (file)
206                 has_write_perm = file->f_mode & FMODE_WRITE;
207
208         /* Write-safe commands just require a writable open.. */
209         if ((type & CMD_WRITE_SAFE) && has_write_perm)
210                 return 0;
211
212         /* And root can do any command.. */
213         if (capable(CAP_SYS_RAWIO))
214                 return 0;
215
216         if (!type) {
217                 cmd_type[cmd[0]] = CMD_WARNED;
218                 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
219         }
220
221         /* Otherwise fail it with an "Operation not permitted" */
222         return -EPERM;
223 }
224
225 static int sg_io(struct file *file, request_queue_t *q,
226                 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
227 {
228         unsigned long start_time, timeout;
229         int writing = 0, ret = 0;
230         struct request *rq;
231         char sense[SCSI_SENSE_BUFFERSIZE];
232         unsigned char cmd[BLK_MAX_CDB];
233         struct bio *bio;
234
235         if (hdr->interface_id != 'S')
236                 return -EINVAL;
237         if (hdr->cmd_len > BLK_MAX_CDB)
238                 return -EINVAL;
239         if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
240                 return -EFAULT;
241         if (verify_command(file, cmd))
242                 return -EPERM;
243
244         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
245                 return -EIO;
246
247         if (hdr->dxfer_len)
248                 switch (hdr->dxfer_direction) {
249                 default:
250                         return -EINVAL;
251                 case SG_DXFER_TO_DEV:
252                         writing = 1;
253                         break;
254                 case SG_DXFER_TO_FROM_DEV:
255                 case SG_DXFER_FROM_DEV:
256                         break;
257                 }
258
259         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
260         if (!rq)
261                 return -ENOMEM;
262
263         /*
264          * fill in request structure
265          */
266         rq->cmd_len = hdr->cmd_len;
267         memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
268         memcpy(rq->cmd, cmd, hdr->cmd_len);
269
270         memset(sense, 0, sizeof(sense));
271         rq->sense = sense;
272         rq->sense_len = 0;
273
274         rq->cmd_type = REQ_TYPE_BLOCK_PC;
275
276         timeout = msecs_to_jiffies(hdr->timeout);
277         rq->timeout = (timeout < INT_MAX) ? timeout : INT_MAX;
278         if (!rq->timeout)
279                 rq->timeout = q->sg_timeout;
280         if (!rq->timeout)
281                 rq->timeout = BLK_DEFAULT_TIMEOUT;
282
283         if (hdr->iovec_count) {
284                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
285                 struct sg_iovec *iov;
286
287                 iov = kmalloc(size, GFP_KERNEL);
288                 if (!iov) {
289                         ret = -ENOMEM;
290                         goto out;
291                 }
292
293                 if (copy_from_user(iov, hdr->dxferp, size)) {
294                         kfree(iov);
295                         ret = -EFAULT;
296                         goto out;
297                 }
298
299                 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
300                                           hdr->dxfer_len);
301                 kfree(iov);
302         } else if (hdr->dxfer_len)
303                 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
304
305         if (ret)
306                 goto out;
307
308         bio = rq->bio;
309         rq->retries = 0;
310
311         start_time = jiffies;
312
313         /* ignore return value. All information is passed back to caller
314          * (if he doesn't check that is his problem).
315          * N.B. a non-zero SCSI status is _not_ necessarily an error.
316          */
317         blk_execute_rq(q, bd_disk, rq, 0);
318
319         /* write to all output members */
320         hdr->status = 0xff & rq->errors;
321         hdr->masked_status = status_byte(rq->errors);
322         hdr->msg_status = msg_byte(rq->errors);
323         hdr->host_status = host_byte(rq->errors);
324         hdr->driver_status = driver_byte(rq->errors);
325         hdr->info = 0;
326         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
327                 hdr->info |= SG_INFO_CHECK;
328         hdr->resid = rq->data_len;
329         hdr->duration = ((jiffies - start_time) * 1000) / HZ;
330         hdr->sb_len_wr = 0;
331
332         if (rq->sense_len && hdr->sbp) {
333                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
334
335                 if (!copy_to_user(hdr->sbp, rq->sense, len))
336                         hdr->sb_len_wr = len;
337         }
338
339         if (blk_rq_unmap_user(bio))
340                 ret = -EFAULT;
341
342         /* may not have succeeded, but output values written to control
343          * structure (struct sg_io_hdr).  */
344 out:
345         blk_put_request(rq);
346         return ret;
347 }
348
349 /**
350  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
351  * @file:       file this ioctl operates on (optional)
352  * @q:          request queue to send scsi commands down
353  * @disk:       gendisk to operate on (option)
354  * @sic:        userspace structure describing the command to perform
355  *
356  * Send down the scsi command described by @sic to the device below
357  * the request queue @q.  If @file is non-NULL it's used to perform
358  * fine-grained permission checks that allow users to send down
359  * non-destructive SCSI commands.  If the caller has a struct gendisk
360  * available it should be passed in as @disk to allow the low level
361  * driver to use the information contained in it.  A non-NULL @disk
362  * is only allowed if the caller knows that the low level driver doesn't
363  * need it (e.g. in the scsi subsystem).
364  *
365  * Notes:
366  *   -  This interface is deprecated - users should use the SG_IO
367  *      interface instead, as this is a more flexible approach to
368  *      performing SCSI commands on a device.
369  *   -  The SCSI command length is determined by examining the 1st byte
370  *      of the given command. There is no way to override this.
371  *   -  Data transfers are limited to PAGE_SIZE
372  *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
373  *      accommodate the sense buffer when an error occurs.
374  *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
375  *      old code will not be surprised.
376  *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
377  *      a negative return and the Unix error code in 'errno'.
378  *      If the SCSI command succeeds then 0 is returned.
379  *      Positive numbers returned are the compacted SCSI error codes (4
380  *      bytes in one int) where the lowest byte is the SCSI status.
381  */
382 #define OMAX_SB_LEN 16          /* For backward compatibility */
383 int sg_scsi_ioctl(struct file *file, struct request_queue *q,
384                   struct gendisk *disk, struct scsi_ioctl_command __user *sic)
385 {
386         struct request *rq;
387         int err;
388         unsigned int in_len, out_len, bytes, opcode, cmdlen;
389         char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
390
391         if (!sic)
392                 return -EINVAL;
393
394         /*
395          * get in an out lengths, verify they don't exceed a page worth of data
396          */
397         if (get_user(in_len, &sic->inlen))
398                 return -EFAULT;
399         if (get_user(out_len, &sic->outlen))
400                 return -EFAULT;
401         if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
402                 return -EINVAL;
403         if (get_user(opcode, sic->data))
404                 return -EFAULT;
405
406         bytes = max(in_len, out_len);
407         if (bytes) {
408                 buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
409                 if (!buffer)
410                         return -ENOMEM;
411
412                 memset(buffer, 0, bytes);
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 = verify_command(file, rq->cmd);
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_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(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
496 {
497         struct request *rq;
498         int err;
499
500         rq = blk_get_request(q, WRITE, __GFP_WAIT);
501         rq->cmd_type = REQ_TYPE_BLOCK_PC;
502         rq->data = NULL;
503         rq->data_len = 0;
504         rq->timeout = BLK_DEFAULT_TIMEOUT;
505         memset(rq->cmd, 0, sizeof(rq->cmd));
506         rq->cmd[0] = cmd;
507         rq->cmd[4] = data;
508         rq->cmd_len = 6;
509         err = blk_execute_rq(q, bd_disk, rq, 0);
510         blk_put_request(rq);
511
512         return err;
513 }
514
515 static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
516 {
517         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
518 }
519
520 int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
521 {
522         request_queue_t *q;
523         int err;
524
525         q = bd_disk->queue;
526         if (!q)
527                 return -ENXIO;
528
529         if (blk_get_queue(q))
530                 return -ENXIO;
531
532         switch (cmd) {
533                 /*
534                  * new sgv3 interface
535                  */
536                 case SG_GET_VERSION_NUM:
537                         err = sg_get_version(arg);
538                         break;
539                 case SCSI_IOCTL_GET_IDLUN:
540                         err = scsi_get_idlun(q, arg);
541                         break;
542                 case SCSI_IOCTL_GET_BUS_NUMBER:
543                         err = scsi_get_bus(q, arg);
544                         break;
545                 case SG_SET_TIMEOUT:
546                         err = sg_set_timeout(q, arg);
547                         break;
548                 case SG_GET_TIMEOUT:
549                         err = sg_get_timeout(q);
550                         break;
551                 case SG_GET_RESERVED_SIZE:
552                         err = sg_get_reserved_size(q, arg);
553                         break;
554                 case SG_SET_RESERVED_SIZE:
555                         err = sg_set_reserved_size(q, arg);
556                         break;
557                 case SG_EMULATED_HOST:
558                         err = sg_emulated_host(q, arg);
559                         break;
560                 case SG_IO: {
561                         struct sg_io_hdr hdr;
562
563                         err = -EFAULT;
564                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
565                                 break;
566                         err = sg_io(file, q, bd_disk, &hdr);
567                         if (err == -EFAULT)
568                                 break;
569
570                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
571                                 err = -EFAULT;
572                         break;
573                 }
574                 case CDROM_SEND_PACKET: {
575                         struct cdrom_generic_command cgc;
576                         struct sg_io_hdr hdr;
577
578                         err = -EFAULT;
579                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
580                                 break;
581                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
582                         memset(&hdr, 0, sizeof(hdr));
583                         hdr.interface_id = 'S';
584                         hdr.cmd_len = sizeof(cgc.cmd);
585                         hdr.dxfer_len = cgc.buflen;
586                         err = 0;
587                         switch (cgc.data_direction) {
588                                 case CGC_DATA_UNKNOWN:
589                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
590                                         break;
591                                 case CGC_DATA_WRITE:
592                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
593                                         break;
594                                 case CGC_DATA_READ:
595                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
596                                         break;
597                                 case CGC_DATA_NONE:
598                                         hdr.dxfer_direction = SG_DXFER_NONE;
599                                         break;
600                                 default:
601                                         err = -EINVAL;
602                         }
603                         if (err)
604                                 break;
605
606                         hdr.dxferp = cgc.buffer;
607                         hdr.sbp = cgc.sense;
608                         if (hdr.sbp)
609                                 hdr.mx_sb_len = sizeof(struct request_sense);
610                         hdr.timeout = cgc.timeout;
611                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
612                         hdr.cmd_len = sizeof(cgc.cmd);
613
614                         err = sg_io(file, q, bd_disk, &hdr);
615                         if (err == -EFAULT)
616                                 break;
617
618                         if (hdr.status)
619                                 err = -EIO;
620
621                         cgc.stat = err;
622                         cgc.buflen = hdr.resid;
623                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
624                                 err = -EFAULT;
625
626                         break;
627                 }
628
629                 /*
630                  * old junk scsi send command ioctl
631                  */
632                 case SCSI_IOCTL_SEND_COMMAND:
633                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
634                         err = -EINVAL;
635                         if (!arg)
636                                 break;
637
638                         err = sg_scsi_ioctl(file, q, bd_disk, arg);
639                         break;
640                 case CDROMCLOSETRAY:
641                         err = blk_send_start_stop(q, bd_disk, 0x03);
642                         break;
643                 case CDROMEJECT:
644                         err = blk_send_start_stop(q, bd_disk, 0x02);
645                         break;
646                 default:
647                         err = -ENOTTY;
648         }
649
650         blk_put_queue(q);
651         return err;
652 }
653
654 EXPORT_SYMBOL(scsi_cmd_ioctl);