block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov
[linux-2.6.git] / block / scsi_ioctl.c
1 /*
2  * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  *
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public Licens
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
17  *
18  */
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/module.h>
23 #include <linux/blkdev.h>
24 #include <linux/capability.h>
25 #include <linux/completion.h>
26 #include <linux/cdrom.h>
27 #include <linux/slab.h>
28 #include <linux/times.h>
29 #include <asm/uaccess.h>
30
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_ioctl.h>
33 #include <scsi/scsi_cmnd.h>
34
35 /* Command group 3 is reserved and should never be used.  */
36 const unsigned char scsi_command_size_tbl[8] =
37 {
38         6, 10, 10, 12,
39         16, 12, 10, 10
40 };
41 EXPORT_SYMBOL(scsi_command_size_tbl);
42
43 #include <scsi/sg.h>
44
45 static int sg_get_version(int __user *p)
46 {
47         static const int sg_version_num = 30527;
48         return put_user(sg_version_num, p);
49 }
50
51 static int scsi_get_idlun(struct request_queue *q, int __user *p)
52 {
53         return put_user(0, p);
54 }
55
56 static int scsi_get_bus(struct request_queue *q, int __user *p)
57 {
58         return put_user(0, p);
59 }
60
61 static int sg_get_timeout(struct request_queue *q)
62 {
63         return 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 void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
109 {
110         /* Basic read-only commands */
111         __set_bit(TEST_UNIT_READY, filter->read_ok);
112         __set_bit(REQUEST_SENSE, filter->read_ok);
113         __set_bit(READ_6, filter->read_ok);
114         __set_bit(READ_10, filter->read_ok);
115         __set_bit(READ_12, filter->read_ok);
116         __set_bit(READ_16, filter->read_ok);
117         __set_bit(READ_BUFFER, filter->read_ok);
118         __set_bit(READ_DEFECT_DATA, filter->read_ok);
119         __set_bit(READ_CAPACITY, filter->read_ok);
120         __set_bit(READ_LONG, filter->read_ok);
121         __set_bit(INQUIRY, filter->read_ok);
122         __set_bit(MODE_SENSE, filter->read_ok);
123         __set_bit(MODE_SENSE_10, filter->read_ok);
124         __set_bit(LOG_SENSE, filter->read_ok);
125         __set_bit(START_STOP, filter->read_ok);
126         __set_bit(GPCMD_VERIFY_10, filter->read_ok);
127         __set_bit(VERIFY_16, filter->read_ok);
128         __set_bit(REPORT_LUNS, filter->read_ok);
129         __set_bit(SERVICE_ACTION_IN, filter->read_ok);
130         __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
131         __set_bit(MAINTENANCE_IN, filter->read_ok);
132         __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
133
134         /* Audio CD commands */
135         __set_bit(GPCMD_PLAY_CD, filter->read_ok);
136         __set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
137         __set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
138         __set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
139         __set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
140
141         /* CD/DVD data reading */
142         __set_bit(GPCMD_READ_CD, filter->read_ok);
143         __set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
144         __set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
145         __set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
146         __set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
147         __set_bit(GPCMD_READ_HEADER, filter->read_ok);
148         __set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
149         __set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
150         __set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
151         __set_bit(GPCMD_REPORT_KEY, filter->read_ok);
152         __set_bit(GPCMD_SCAN, filter->read_ok);
153         __set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
154         __set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
155         __set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
156         __set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
157         __set_bit(GPCMD_SEEK, filter->read_ok);
158         __set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
159
160         /* Basic writing commands */
161         __set_bit(WRITE_6, filter->write_ok);
162         __set_bit(WRITE_10, filter->write_ok);
163         __set_bit(WRITE_VERIFY, filter->write_ok);
164         __set_bit(WRITE_12, filter->write_ok);
165         __set_bit(WRITE_VERIFY_12, filter->write_ok);
166         __set_bit(WRITE_16, filter->write_ok);
167         __set_bit(WRITE_LONG, filter->write_ok);
168         __set_bit(WRITE_LONG_2, filter->write_ok);
169         __set_bit(ERASE, filter->write_ok);
170         __set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
171         __set_bit(MODE_SELECT, filter->write_ok);
172         __set_bit(LOG_SELECT, filter->write_ok);
173         __set_bit(GPCMD_BLANK, filter->write_ok);
174         __set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
175         __set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
176         __set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
177         __set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
178         __set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
179         __set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
180         __set_bit(GPCMD_SEND_EVENT, filter->write_ok);
181         __set_bit(GPCMD_SEND_KEY, filter->write_ok);
182         __set_bit(GPCMD_SEND_OPC, filter->write_ok);
183         __set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
184         __set_bit(GPCMD_SET_SPEED, filter->write_ok);
185         __set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
186         __set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
187         __set_bit(GPCMD_SET_STREAMING, filter->write_ok);
188         __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
189 }
190 EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults);
191
192 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
193                              struct sg_io_hdr *hdr, struct file *file)
194 {
195         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
196                 return -EFAULT;
197         if (blk_verify_command(&q->cmd_filter, rq->cmd,
198                                file->f_mode & FMODE_WRITE))
199                 return -EPERM;
200
201         /*
202          * fill in request structure
203          */
204         rq->cmd_len = hdr->cmd_len;
205         rq->cmd_type = REQ_TYPE_BLOCK_PC;
206
207         rq->timeout = msecs_to_jiffies(hdr->timeout);
208         if (!rq->timeout)
209                 rq->timeout = q->sg_timeout;
210         if (!rq->timeout)
211                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
212
213         return 0;
214 }
215
216 /*
217  * unmap a request that was previously mapped to this sg_io_hdr. handles
218  * both sg and non-sg sg_io_hdr.
219  */
220 static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
221 {
222         blk_rq_unmap_user(rq->bio);
223         blk_put_request(rq);
224         return 0;
225 }
226
227 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
228                                  struct bio *bio)
229 {
230         int r, ret = 0;
231
232         /*
233          * fill in all the output members
234          */
235         hdr->status = rq->errors & 0xff;
236         hdr->masked_status = status_byte(rq->errors);
237         hdr->msg_status = msg_byte(rq->errors);
238         hdr->host_status = host_byte(rq->errors);
239         hdr->driver_status = driver_byte(rq->errors);
240         hdr->info = 0;
241         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
242                 hdr->info |= SG_INFO_CHECK;
243         hdr->resid = rq->data_len;
244         hdr->sb_len_wr = 0;
245
246         if (rq->sense_len && hdr->sbp) {
247                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
248
249                 if (!copy_to_user(hdr->sbp, rq->sense, len))
250                         hdr->sb_len_wr = len;
251                 else
252                         ret = -EFAULT;
253         }
254
255         rq->bio = bio;
256         r = blk_unmap_sghdr_rq(rq, hdr);
257         if (ret)
258                 r = ret;
259
260         return r;
261 }
262
263 static int sg_io(struct file *file, struct request_queue *q,
264                 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
265 {
266         unsigned long start_time;
267         int writing = 0, ret = 0;
268         struct request *rq;
269         char sense[SCSI_SENSE_BUFFERSIZE];
270         struct bio *bio;
271
272         if (hdr->interface_id != 'S')
273                 return -EINVAL;
274         if (hdr->cmd_len > BLK_MAX_CDB)
275                 return -EINVAL;
276
277         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
278                 return -EIO;
279
280         if (hdr->dxfer_len)
281                 switch (hdr->dxfer_direction) {
282                 default:
283                         return -EINVAL;
284                 case SG_DXFER_TO_DEV:
285                         writing = 1;
286                         break;
287                 case SG_DXFER_TO_FROM_DEV:
288                 case SG_DXFER_FROM_DEV:
289                         break;
290                 }
291
292         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
293         if (!rq)
294                 return -ENOMEM;
295
296         if (blk_fill_sghdr_rq(q, rq, hdr, file)) {
297                 blk_put_request(rq);
298                 return -EFAULT;
299         }
300
301         if (hdr->iovec_count) {
302                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
303                 struct sg_iovec *iov;
304
305                 iov = kmalloc(size, GFP_KERNEL);
306                 if (!iov) {
307                         ret = -ENOMEM;
308                         goto out;
309                 }
310
311                 if (copy_from_user(iov, hdr->dxferp, size)) {
312                         kfree(iov);
313                         ret = -EFAULT;
314                         goto out;
315                 }
316
317                 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
318                                           hdr->dxfer_len, GFP_KERNEL);
319                 kfree(iov);
320         } else if (hdr->dxfer_len)
321                 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len,
322                                       GFP_KERNEL);
323
324         if (ret)
325                 goto out;
326
327         bio = rq->bio;
328         memset(sense, 0, sizeof(sense));
329         rq->sense = sense;
330         rq->sense_len = 0;
331         rq->retries = 0;
332
333         start_time = jiffies;
334
335         /* ignore return value. All information is passed back to caller
336          * (if he doesn't check that is his problem).
337          * N.B. a non-zero SCSI status is _not_ necessarily an error.
338          */
339         blk_execute_rq(q, bd_disk, rq, 0);
340
341         hdr->duration = jiffies_to_msecs(jiffies - start_time);
342
343         return blk_complete_sghdr_rq(rq, hdr, bio);
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, write_perm = 0;
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 = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
409                 if (!buffer)
410                         return -ENOMEM;
411
412         }
413
414         rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
415
416         cmdlen = COMMAND_SIZE(opcode);
417
418         /*
419          * get command and data to send to device, if any
420          */
421         err = -EFAULT;
422         rq->cmd_len = cmdlen;
423         if (copy_from_user(rq->cmd, sic->data, cmdlen))
424                 goto error;
425
426         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
427                 goto error;
428
429         /* scsi_ioctl passes NULL */
430         if (file && (file->f_mode & FMODE_WRITE))
431                 write_perm = 1;
432
433         err = blk_verify_command(&q->cmd_filter, rq->cmd, write_perm);
434         if (err)
435                 goto error;
436
437         /* default.  possible overriden later */
438         rq->retries = 5;
439
440         switch (opcode) {
441         case SEND_DIAGNOSTIC:
442         case FORMAT_UNIT:
443                 rq->timeout = FORMAT_UNIT_TIMEOUT;
444                 rq->retries = 1;
445                 break;
446         case START_STOP:
447                 rq->timeout = START_STOP_TIMEOUT;
448                 break;
449         case MOVE_MEDIUM:
450                 rq->timeout = MOVE_MEDIUM_TIMEOUT;
451                 break;
452         case READ_ELEMENT_STATUS:
453                 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
454                 break;
455         case READ_DEFECT_DATA:
456                 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
457                 rq->retries = 1;
458                 break;
459         default:
460                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
461                 break;
462         }
463
464         if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
465                 err = DRIVER_ERROR << 24;
466                 goto out;
467         }
468
469         memset(sense, 0, sizeof(sense));
470         rq->sense = sense;
471         rq->sense_len = 0;
472         rq->cmd_type = REQ_TYPE_BLOCK_PC;
473
474         blk_execute_rq(q, disk, rq, 0);
475
476 out:
477         err = rq->errors & 0xff;        /* only 8 bit SCSI status */
478         if (err) {
479                 if (rq->sense_len && rq->sense) {
480                         bytes = (OMAX_SB_LEN > rq->sense_len) ?
481                                 rq->sense_len : OMAX_SB_LEN;
482                         if (copy_to_user(sic->data, rq->sense, bytes))
483                                 err = -EFAULT;
484                 }
485         } else {
486                 if (copy_to_user(sic->data, buffer, out_len))
487                         err = -EFAULT;
488         }
489         
490 error:
491         kfree(buffer);
492         blk_put_request(rq);
493         return err;
494 }
495 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
496
497 /* Send basic block requests */
498 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
499                               int cmd, int data)
500 {
501         struct request *rq;
502         int err;
503
504         rq = blk_get_request(q, WRITE, __GFP_WAIT);
505         rq->cmd_type = REQ_TYPE_BLOCK_PC;
506         rq->data = NULL;
507         rq->data_len = 0;
508         rq->extra_len = 0;
509         rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
510         rq->cmd[0] = cmd;
511         rq->cmd[4] = data;
512         rq->cmd_len = 6;
513         err = blk_execute_rq(q, bd_disk, rq, 0);
514         blk_put_request(rq);
515
516         return err;
517 }
518
519 static inline int blk_send_start_stop(struct request_queue *q,
520                                       struct gendisk *bd_disk, int data)
521 {
522         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
523 }
524
525 int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
526                    struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
527 {
528         int err;
529
530         if (!q || blk_get_queue(q))
531                 return -ENXIO;
532
533         switch (cmd) {
534                 /*
535                  * new sgv3 interface
536                  */
537                 case SG_GET_VERSION_NUM:
538                         err = sg_get_version(arg);
539                         break;
540                 case SCSI_IOCTL_GET_IDLUN:
541                         err = scsi_get_idlun(q, arg);
542                         break;
543                 case SCSI_IOCTL_GET_BUS_NUMBER:
544                         err = scsi_get_bus(q, arg);
545                         break;
546                 case SG_SET_TIMEOUT:
547                         err = sg_set_timeout(q, arg);
548                         break;
549                 case SG_GET_TIMEOUT:
550                         err = sg_get_timeout(q);
551                         break;
552                 case SG_GET_RESERVED_SIZE:
553                         err = sg_get_reserved_size(q, arg);
554                         break;
555                 case SG_SET_RESERVED_SIZE:
556                         err = sg_set_reserved_size(q, arg);
557                         break;
558                 case SG_EMULATED_HOST:
559                         err = sg_emulated_host(q, arg);
560                         break;
561                 case SG_IO: {
562                         struct sg_io_hdr hdr;
563
564                         err = -EFAULT;
565                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
566                                 break;
567                         err = sg_io(file, q, bd_disk, &hdr);
568                         if (err == -EFAULT)
569                                 break;
570
571                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
572                                 err = -EFAULT;
573                         break;
574                 }
575                 case CDROM_SEND_PACKET: {
576                         struct cdrom_generic_command cgc;
577                         struct sg_io_hdr hdr;
578
579                         err = -EFAULT;
580                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
581                                 break;
582                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
583                         memset(&hdr, 0, sizeof(hdr));
584                         hdr.interface_id = 'S';
585                         hdr.cmd_len = sizeof(cgc.cmd);
586                         hdr.dxfer_len = cgc.buflen;
587                         err = 0;
588                         switch (cgc.data_direction) {
589                                 case CGC_DATA_UNKNOWN:
590                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
591                                         break;
592                                 case CGC_DATA_WRITE:
593                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
594                                         break;
595                                 case CGC_DATA_READ:
596                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
597                                         break;
598                                 case CGC_DATA_NONE:
599                                         hdr.dxfer_direction = SG_DXFER_NONE;
600                                         break;
601                                 default:
602                                         err = -EINVAL;
603                         }
604                         if (err)
605                                 break;
606
607                         hdr.dxferp = cgc.buffer;
608                         hdr.sbp = cgc.sense;
609                         if (hdr.sbp)
610                                 hdr.mx_sb_len = sizeof(struct request_sense);
611                         hdr.timeout = jiffies_to_msecs(cgc.timeout);
612                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
613                         hdr.cmd_len = sizeof(cgc.cmd);
614
615                         err = sg_io(file, q, bd_disk, &hdr);
616                         if (err == -EFAULT)
617                                 break;
618
619                         if (hdr.status)
620                                 err = -EIO;
621
622                         cgc.stat = err;
623                         cgc.buflen = hdr.resid;
624                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
625                                 err = -EFAULT;
626
627                         break;
628                 }
629
630                 /*
631                  * old junk scsi send command ioctl
632                  */
633                 case SCSI_IOCTL_SEND_COMMAND:
634                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
635                         err = -EINVAL;
636                         if (!arg)
637                                 break;
638
639                         err = sg_scsi_ioctl(file, q, bd_disk, arg);
640                         break;
641                 case CDROMCLOSETRAY:
642                         err = blk_send_start_stop(q, bd_disk, 0x03);
643                         break;
644                 case CDROMEJECT:
645                         err = blk_send_start_stop(q, bd_disk, 0x02);
646                         break;
647                 default:
648                         err = -ENOTTY;
649         }
650
651         blk_put_queue(q);
652         return err;
653 }
654
655 EXPORT_SYMBOL(scsi_cmd_ioctl);