blob: 18de84c8ccd8bca5d1fafe8d0326cda0998cf87d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/completion.h>
25#include <linux/cdrom.h>
26#include <linux/slab.h>
27#include <linux/times.h>
28#include <asm/uaccess.h>
29
30#include <scsi/scsi.h>
31#include <scsi/scsi_ioctl.h>
32#include <scsi/scsi_cmnd.h>
33
34/* Command group 3 is reserved and should never be used. */
35const unsigned char scsi_command_size[8] =
36{
37 6, 10, 10, 12,
38 16, 12, 10, 10
39};
40
41EXPORT_SYMBOL(scsi_command_size);
42
43#define BLK_DEFAULT_TIMEOUT (60 * HZ)
44
45#include <scsi/sg.h>
46
47static int sg_get_version(int __user *p)
48{
Arjan van de Ven64100092006-01-06 09:46:02 +010049 static const int sg_version_num = 30527;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 return put_user(sg_version_num, p);
51}
52
53static int scsi_get_idlun(request_queue_t *q, int __user *p)
54{
55 return put_user(0, p);
56}
57
58static int scsi_get_bus(request_queue_t *q, int __user *p)
59{
60 return put_user(0, p);
61}
62
63static int sg_get_timeout(request_queue_t *q)
64{
65 return q->sg_timeout / (HZ / USER_HZ);
66}
67
68static int sg_set_timeout(request_queue_t *q, int __user *p)
69{
70 int timeout, err = get_user(timeout, p);
71
72 if (!err)
73 q->sg_timeout = timeout * (HZ / USER_HZ);
74
75 return err;
76}
77
78static int sg_get_reserved_size(request_queue_t *q, int __user *p)
79{
80 return put_user(q->sg_reserved_size, p);
81}
82
83static int sg_set_reserved_size(request_queue_t *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 */
103static int sg_emulated_host(request_queue_t *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
114static int verify_command(struct file *file, unsigned char *cmd)
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),
Douglas Gilbert942fc2f2005-09-09 20:07:32 +1000126 safe_for_read(READ_DEFECT_DATA),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 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),
Thomas Maguin0faf3d32005-09-16 19:27:58 -0700171 safe_for_write(WRITE_LONG_2),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 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]];
Jens Axboe5a57be82006-01-09 14:52:21 +0100193 int has_write_perm = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
195 /* Anybody who can open the device can do a read-safe command */
196 if (type & CMD_READ_SAFE)
197 return 0;
198
Jens Axboe5a57be82006-01-09 14:52:21 +0100199 /*
200 * file can be NULL from ioctl_by_bdev()...
201 */
202 if (file)
203 has_write_perm = file->f_mode & FMODE_WRITE;
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 /* Write-safe commands just require a writable open.. */
Jens Axboe5a57be82006-01-09 14:52:21 +0100206 if ((type & CMD_WRITE_SAFE) && has_write_perm)
207 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Jens Axboe3b0e77b2005-10-07 19:41:34 +0200209 /* And root can do any command.. */
210 if (capable(CAP_SYS_RAWIO))
211 return 0;
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (!type) {
214 cmd_type[cmd[0]] = CMD_WARNED;
215 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
216 }
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 /* Otherwise fail it with an "Operation not permitted" */
219 return -EPERM;
220}
221
222static int sg_io(struct file *file, request_queue_t *q,
223 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
224{
225 unsigned long start_time;
Jens Axboef63eb212005-06-20 14:10:25 +0200226 int writing = 0, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 struct request *rq;
228 struct bio *bio;
229 char sense[SCSI_SENSE_BUFFERSIZE];
230 unsigned char cmd[BLK_MAX_CDB];
231
232 if (hdr->interface_id != 'S')
233 return -EINVAL;
234 if (hdr->cmd_len > BLK_MAX_CDB)
235 return -EINVAL;
236 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
237 return -EFAULT;
238 if (verify_command(file, cmd))
239 return -EPERM;
240
Mike Christiedefd94b2005-12-05 02:37:06 -0600241 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 return -EIO;
243
James Bottomley f1970ba2005-06-20 14:06:52 +0200244 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 switch (hdr->dxfer_direction) {
246 default:
247 return -EINVAL;
248 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 case SG_DXFER_TO_DEV:
250 writing = 1;
251 break;
252 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 break;
254 }
255
Jens Axboedd1cab92005-06-20 14:06:01 +0200256 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
257 if (!rq)
258 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
James Bottomley f1970ba2005-06-20 14:06:52 +0200260 if (hdr->iovec_count) {
261 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
262 struct sg_iovec *iov;
263
264 iov = kmalloc(size, GFP_KERNEL);
265 if (!iov) {
266 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200267 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200268 }
269
270 if (copy_from_user(iov, hdr->dxferp, size)) {
271 kfree(iov);
272 ret = -EFAULT;
273 goto out;
274 }
275
276 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count);
277 kfree(iov);
278 } else if (hdr->dxfer_len)
279 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
280
281 if (ret)
282 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
284 /*
285 * fill in request structure
286 */
287 rq->cmd_len = hdr->cmd_len;
288 memcpy(rq->cmd, cmd, hdr->cmd_len);
289 if (sizeof(rq->cmd) != hdr->cmd_len)
290 memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len);
291
292 memset(sense, 0, sizeof(sense));
293 rq->sense = sense;
294 rq->sense_len = 0;
295
296 rq->flags |= REQ_BLOCK_PC;
297 bio = rq->bio;
298
299 /*
300 * bounce this after holding a reference to the original bio, it's
301 * needed for proper unmapping
302 */
303 if (rq->bio)
304 blk_queue_bounce(q, &rq->bio);
305
306 rq->timeout = (hdr->timeout * HZ) / 1000;
307 if (!rq->timeout)
308 rq->timeout = q->sg_timeout;
309 if (!rq->timeout)
310 rq->timeout = BLK_DEFAULT_TIMEOUT;
311
312 start_time = jiffies;
313
314 /* ignore return value. All information is passed back to caller
315 * (if he doesn't check that is his problem).
316 * N.B. a non-zero SCSI status is _not_ necessarily an error.
317 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200318 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 /* write to all output members */
321 hdr->status = 0xff & rq->errors;
322 hdr->masked_status = status_byte(rq->errors);
323 hdr->msg_status = msg_byte(rq->errors);
324 hdr->host_status = host_byte(rq->errors);
325 hdr->driver_status = driver_byte(rq->errors);
326 hdr->info = 0;
327 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
328 hdr->info |= SG_INFO_CHECK;
329 hdr->resid = rq->data_len;
330 hdr->duration = ((jiffies - start_time) * 1000) / HZ;
331 hdr->sb_len_wr = 0;
332
333 if (rq->sense_len && hdr->sbp) {
334 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
335
336 if (!copy_to_user(hdr->sbp, rq->sense, len))
337 hdr->sb_len_wr = len;
338 }
339
James Bottomley e1f546e2005-06-20 14:07:17 +0200340 if (blk_rq_unmap_user(bio, hdr->dxfer_len))
Jens Axboedd1cab92005-06-20 14:06:01 +0200341 ret = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 /* may not have succeeded, but output values written to control
344 * structure (struct sg_io_hdr). */
Jens Axboedd1cab92005-06-20 14:06:01 +0200345out:
346 blk_put_request(rq);
347 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350#define OMAX_SB_LEN 16 /* For backward compatibility */
351
352static int sg_scsi_ioctl(struct file *file, request_queue_t *q,
353 struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic)
354{
355 struct request *rq;
356 int err;
357 unsigned int in_len, out_len, bytes, opcode, cmdlen;
358 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
359
360 /*
361 * get in an out lengths, verify they don't exceed a page worth of data
362 */
363 if (get_user(in_len, &sic->inlen))
364 return -EFAULT;
365 if (get_user(out_len, &sic->outlen))
366 return -EFAULT;
367 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
368 return -EINVAL;
369 if (get_user(opcode, sic->data))
370 return -EFAULT;
371
372 bytes = max(in_len, out_len);
373 if (bytes) {
374 buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
375 if (!buffer)
376 return -ENOMEM;
377
378 memset(buffer, 0, bytes);
379 }
380
381 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
382
383 cmdlen = COMMAND_SIZE(opcode);
384
385 /*
386 * get command and data to send to device, if any
387 */
388 err = -EFAULT;
389 rq->cmd_len = cmdlen;
390 if (copy_from_user(rq->cmd, sic->data, cmdlen))
391 goto error;
392
393 if (copy_from_user(buffer, sic->data + cmdlen, in_len))
394 goto error;
395
396 err = verify_command(file, rq->cmd);
397 if (err)
398 goto error;
399
400 switch (opcode) {
401 case SEND_DIAGNOSTIC:
402 case FORMAT_UNIT:
403 rq->timeout = FORMAT_UNIT_TIMEOUT;
404 break;
405 case START_STOP:
406 rq->timeout = START_STOP_TIMEOUT;
407 break;
408 case MOVE_MEDIUM:
409 rq->timeout = MOVE_MEDIUM_TIMEOUT;
410 break;
411 case READ_ELEMENT_STATUS:
412 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
413 break;
414 case READ_DEFECT_DATA:
415 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
416 break;
417 default:
418 rq->timeout = BLK_DEFAULT_TIMEOUT;
419 break;
420 }
421
422 memset(sense, 0, sizeof(sense));
423 rq->sense = sense;
424 rq->sense_len = 0;
425
426 rq->data = buffer;
427 rq->data_len = bytes;
428 rq->flags |= REQ_BLOCK_PC;
429
James Bottomley 994ca9a2005-06-20 14:11:09 +0200430 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 err = rq->errors & 0xff; /* only 8 bit SCSI status */
432 if (err) {
433 if (rq->sense_len && rq->sense) {
434 bytes = (OMAX_SB_LEN > rq->sense_len) ?
435 rq->sense_len : OMAX_SB_LEN;
436 if (copy_to_user(sic->data, rq->sense, bytes))
437 err = -EFAULT;
438 }
439 } else {
440 if (copy_to_user(sic->data, buffer, out_len))
441 err = -EFAULT;
442 }
443
444error:
445 kfree(buffer);
446 blk_put_request(rq);
447 return err;
448}
449
Ben Collinsf98d2df2005-12-19 11:49:24 -0800450
451/* Send basic block requests */
452static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
453{
454 struct request *rq;
455 int err;
456
457 rq = blk_get_request(q, WRITE, __GFP_WAIT);
458 rq->flags |= REQ_BLOCK_PC;
459 rq->data = NULL;
460 rq->data_len = 0;
461 rq->timeout = BLK_DEFAULT_TIMEOUT;
462 memset(rq->cmd, 0, sizeof(rq->cmd));
463 rq->cmd[0] = cmd;
464 rq->cmd[4] = data;
465 rq->cmd_len = 6;
466 err = blk_execute_rq(q, bd_disk, rq, 0);
467 blk_put_request(rq);
468
469 return err;
470}
471
472static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
473{
474 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
475}
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
478{
479 request_queue_t *q;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800480 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482 q = bd_disk->queue;
483 if (!q)
484 return -ENXIO;
485
486 if (blk_get_queue(q))
487 return -ENXIO;
488
489 switch (cmd) {
490 /*
491 * new sgv3 interface
492 */
493 case SG_GET_VERSION_NUM:
494 err = sg_get_version(arg);
495 break;
496 case SCSI_IOCTL_GET_IDLUN:
497 err = scsi_get_idlun(q, arg);
498 break;
499 case SCSI_IOCTL_GET_BUS_NUMBER:
500 err = scsi_get_bus(q, arg);
501 break;
502 case SG_SET_TIMEOUT:
503 err = sg_set_timeout(q, arg);
504 break;
505 case SG_GET_TIMEOUT:
506 err = sg_get_timeout(q);
507 break;
508 case SG_GET_RESERVED_SIZE:
509 err = sg_get_reserved_size(q, arg);
510 break;
511 case SG_SET_RESERVED_SIZE:
512 err = sg_set_reserved_size(q, arg);
513 break;
514 case SG_EMULATED_HOST:
515 err = sg_emulated_host(q, arg);
516 break;
517 case SG_IO: {
518 struct sg_io_hdr hdr;
519
520 err = -EFAULT;
521 if (copy_from_user(&hdr, arg, sizeof(hdr)))
522 break;
523 err = sg_io(file, q, bd_disk, &hdr);
524 if (err == -EFAULT)
525 break;
526
527 if (copy_to_user(arg, &hdr, sizeof(hdr)))
528 err = -EFAULT;
529 break;
530 }
531 case CDROM_SEND_PACKET: {
532 struct cdrom_generic_command cgc;
533 struct sg_io_hdr hdr;
534
535 err = -EFAULT;
536 if (copy_from_user(&cgc, arg, sizeof(cgc)))
537 break;
538 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
539 memset(&hdr, 0, sizeof(hdr));
540 hdr.interface_id = 'S';
541 hdr.cmd_len = sizeof(cgc.cmd);
542 hdr.dxfer_len = cgc.buflen;
543 err = 0;
544 switch (cgc.data_direction) {
545 case CGC_DATA_UNKNOWN:
546 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
547 break;
548 case CGC_DATA_WRITE:
549 hdr.dxfer_direction = SG_DXFER_TO_DEV;
550 break;
551 case CGC_DATA_READ:
552 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
553 break;
554 case CGC_DATA_NONE:
555 hdr.dxfer_direction = SG_DXFER_NONE;
556 break;
557 default:
558 err = -EINVAL;
559 }
560 if (err)
561 break;
562
563 hdr.dxferp = cgc.buffer;
564 hdr.sbp = cgc.sense;
565 if (hdr.sbp)
566 hdr.mx_sb_len = sizeof(struct request_sense);
567 hdr.timeout = cgc.timeout;
568 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
569 hdr.cmd_len = sizeof(cgc.cmd);
570
571 err = sg_io(file, q, bd_disk, &hdr);
572 if (err == -EFAULT)
573 break;
574
575 if (hdr.status)
576 err = -EIO;
577
578 cgc.stat = err;
579 cgc.buflen = hdr.resid;
580 if (copy_to_user(arg, &cgc, sizeof(cgc)))
581 err = -EFAULT;
582
583 break;
584 }
585
586 /*
587 * old junk scsi send command ioctl
588 */
589 case SCSI_IOCTL_SEND_COMMAND:
590 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
591 err = -EINVAL;
592 if (!arg)
593 break;
594
595 err = sg_scsi_ioctl(file, q, bd_disk, arg);
596 break;
597 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800598 err = blk_send_start_stop(q, bd_disk, 0x03);
599 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800601 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 break;
603 default:
604 err = -ENOTTY;
605 }
606
607 blk_put_queue(q);
608 return err;
609}
610
611EXPORT_SYMBOL(scsi_cmd_ioctl);