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