bsg: add a request_queue argument to scsi_cmd_ioctl()
[linux-2.6.git] / block / scsi_ioctl.c
1 /*
2  * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  *
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public Licens
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
17  *
18  */
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/module.h>
23 #include <linux/blkdev.h>
24 #include <linux/capability.h>
25 #include <linux/completion.h>
26 #include <linux/cdrom.h>
27 #include <linux/slab.h>
28 #include <linux/times.h>
29 #include <asm/uaccess.h>
30
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_ioctl.h>
33 #include <scsi/scsi_cmnd.h>
34
35 /* Command group 3 is reserved and should never be used.  */
36 const unsigned char scsi_command_size[8] =
37 {
38         6, 10, 10, 12,
39         16, 12, 10, 10
40 };
41
42 EXPORT_SYMBOL(scsi_command_size);
43
44 #include <scsi/sg.h>
45
46 static int sg_get_version(int __user *p)
47 {
48         static const int sg_version_num = 30527;
49         return put_user(sg_version_num, p);
50 }
51
52 static int scsi_get_idlun(request_queue_t *q, int __user *p)
53 {
54         return put_user(0, p);
55 }
56
57 static int scsi_get_bus(request_queue_t *q, int __user *p)
58 {
59         return put_user(0, p);
60 }
61
62 static int sg_get_timeout(request_queue_t *q)
63 {
64         return q->sg_timeout / (HZ / USER_HZ);
65 }
66
67 static int sg_set_timeout(request_queue_t *q, int __user *p)
68 {
69         int timeout, err = get_user(timeout, p);
70
71         if (!err)
72                 q->sg_timeout = timeout * (HZ / USER_HZ);
73
74         return err;
75 }
76
77 static int sg_get_reserved_size(request_queue_t *q, int __user *p)
78 {
79         unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
80
81         return put_user(val, p);
82 }
83
84 static int sg_set_reserved_size(request_queue_t *q, int __user *p)
85 {
86         int size, err = get_user(size, p);
87
88         if (err)
89                 return err;
90
91         if (size < 0)
92                 return -EINVAL;
93         if (size > (q->max_sectors << 9))
94                 size = q->max_sectors << 9;
95
96         q->sg_reserved_size = size;
97         return 0;
98 }
99
100 /*
101  * will always return that we are ATAPI even for a real SCSI drive, I'm not
102  * so sure this is worth doing anything about (why would you care??)
103  */
104 static int sg_emulated_host(request_queue_t *q, int __user *p)
105 {
106         return put_user(1, p);
107 }
108
109 #define CMD_READ_SAFE   0x01
110 #define CMD_WRITE_SAFE  0x02
111 #define CMD_WARNED      0x04
112 #define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
113 #define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
114
115 int blk_verify_command(unsigned char *cmd, int has_write_perm)
116 {
117         static unsigned char cmd_type[256] = {
118
119                 /* Basic read-only commands */
120                 safe_for_read(TEST_UNIT_READY),
121                 safe_for_read(REQUEST_SENSE),
122                 safe_for_read(READ_6),
123                 safe_for_read(READ_10),
124                 safe_for_read(READ_12),
125                 safe_for_read(READ_16),
126                 safe_for_read(READ_BUFFER),
127                 safe_for_read(READ_DEFECT_DATA),
128                 safe_for_read(READ_LONG),
129                 safe_for_read(INQUIRY),
130                 safe_for_read(MODE_SENSE),
131                 safe_for_read(MODE_SENSE_10),
132                 safe_for_read(LOG_SENSE),
133                 safe_for_read(START_STOP),
134                 safe_for_read(GPCMD_VERIFY_10),
135                 safe_for_read(VERIFY_16),
136
137                 /* Audio CD commands */
138                 safe_for_read(GPCMD_PLAY_CD),
139                 safe_for_read(GPCMD_PLAY_AUDIO_10),
140                 safe_for_read(GPCMD_PLAY_AUDIO_MSF),
141                 safe_for_read(GPCMD_PLAY_AUDIO_TI),
142                 safe_for_read(GPCMD_PAUSE_RESUME),
143
144                 /* CD/DVD data reading */
145                 safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
146                 safe_for_read(GPCMD_READ_CD),
147                 safe_for_read(GPCMD_READ_CD_MSF),
148                 safe_for_read(GPCMD_READ_DISC_INFO),
149                 safe_for_read(GPCMD_READ_CDVD_CAPACITY),
150                 safe_for_read(GPCMD_READ_DVD_STRUCTURE),
151                 safe_for_read(GPCMD_READ_HEADER),
152                 safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
153                 safe_for_read(GPCMD_READ_SUBCHANNEL),
154                 safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
155                 safe_for_read(GPCMD_REPORT_KEY),
156                 safe_for_read(GPCMD_SCAN),
157                 safe_for_read(GPCMD_GET_CONFIGURATION),
158                 safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
159                 safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
160                 safe_for_read(GPCMD_GET_PERFORMANCE),
161                 safe_for_read(GPCMD_SEEK),
162                 safe_for_read(GPCMD_STOP_PLAY_SCAN),
163
164                 /* Basic writing commands */
165                 safe_for_write(WRITE_6),
166                 safe_for_write(WRITE_10),
167                 safe_for_write(WRITE_VERIFY),
168                 safe_for_write(WRITE_12),
169                 safe_for_write(WRITE_VERIFY_12),
170                 safe_for_write(WRITE_16),
171                 safe_for_write(WRITE_LONG),
172                 safe_for_write(WRITE_LONG_2),
173                 safe_for_write(ERASE),
174                 safe_for_write(GPCMD_MODE_SELECT_10),
175                 safe_for_write(MODE_SELECT),
176                 safe_for_write(LOG_SELECT),
177                 safe_for_write(GPCMD_BLANK),
178                 safe_for_write(GPCMD_CLOSE_TRACK),
179                 safe_for_write(GPCMD_FLUSH_CACHE),
180                 safe_for_write(GPCMD_FORMAT_UNIT),
181                 safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
182                 safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
183                 safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
184                 safe_for_write(GPCMD_SEND_EVENT),
185                 safe_for_write(GPCMD_SEND_KEY),
186                 safe_for_write(GPCMD_SEND_OPC),
187                 safe_for_write(GPCMD_SEND_CUE_SHEET),
188                 safe_for_write(GPCMD_SET_SPEED),
189                 safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
190                 safe_for_write(GPCMD_LOAD_UNLOAD),
191                 safe_for_write(GPCMD_SET_STREAMING),
192         };
193         unsigned char type = cmd_type[cmd[0]];
194
195         /* Anybody who can open the device can do a read-safe command */
196         if (type & CMD_READ_SAFE)
197                 return 0;
198
199         /* Write-safe commands just require a writable open.. */
200         if ((type & CMD_WRITE_SAFE) && has_write_perm)
201                 return 0;
202
203         /* And root can do any command.. */
204         if (capable(CAP_SYS_RAWIO))
205                 return 0;
206
207         if (!type) {
208                 cmd_type[cmd[0]] = CMD_WARNED;
209                 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
210         }
211
212         /* Otherwise fail it with an "Operation not permitted" */
213         return -EPERM;
214 }
215 EXPORT_SYMBOL_GPL(blk_verify_command);
216
217 int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
218                       struct sg_io_hdr *hdr, int has_write_perm)
219 {
220         memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
221
222         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
223                 return -EFAULT;
224         if (blk_verify_command(rq->cmd, has_write_perm))
225                 return -EPERM;
226
227         /*
228          * fill in request structure
229          */
230         rq->cmd_len = hdr->cmd_len;
231         rq->cmd_type = REQ_TYPE_BLOCK_PC;
232
233         rq->timeout = (hdr->timeout * HZ) / 1000;
234         if (!rq->timeout)
235                 rq->timeout = q->sg_timeout;
236         if (!rq->timeout)
237                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
238
239         return 0;
240 }
241 EXPORT_SYMBOL_GPL(blk_fill_sghdr_rq);
242
243 /*
244  * unmap a request that was previously mapped to this sg_io_hdr. handles
245  * both sg and non-sg sg_io_hdr.
246  */
247 int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
248 {
249         blk_rq_unmap_user(rq->bio);
250         blk_put_request(rq);
251         return 0;
252 }
253 EXPORT_SYMBOL_GPL(blk_unmap_sghdr_rq);
254
255 int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
256                           struct bio *bio)
257 {
258         int r, ret = 0;
259
260         /*
261          * fill in all the output members
262          */
263         hdr->status = rq->errors & 0xff;
264         hdr->masked_status = status_byte(rq->errors);
265         hdr->msg_status = msg_byte(rq->errors);
266         hdr->host_status = host_byte(rq->errors);
267         hdr->driver_status = driver_byte(rq->errors);
268         hdr->info = 0;
269         if (hdr->masked_status || hdr->host_status || hdr->driver_status)
270                 hdr->info |= SG_INFO_CHECK;
271         hdr->resid = rq->data_len;
272         hdr->sb_len_wr = 0;
273
274         if (rq->sense_len && hdr->sbp) {
275                 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
276
277                 if (!copy_to_user(hdr->sbp, rq->sense, len))
278                         hdr->sb_len_wr = len;
279                 else
280                         ret = -EFAULT;
281         }
282
283         rq->bio = bio;
284         r = blk_unmap_sghdr_rq(rq, hdr);
285         if (ret)
286                 r = ret;
287
288         return r;
289 }
290 EXPORT_SYMBOL_GPL(blk_complete_sghdr_rq);
291
292 static int sg_io(struct file *file, request_queue_t *q,
293                 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
294 {
295         unsigned long start_time;
296         int writing = 0, ret = 0, has_write_perm = 0;
297         struct request *rq;
298         char sense[SCSI_SENSE_BUFFERSIZE];
299         struct bio *bio;
300
301         if (hdr->interface_id != 'S')
302                 return -EINVAL;
303         if (hdr->cmd_len > BLK_MAX_CDB)
304                 return -EINVAL;
305
306         if (hdr->dxfer_len > (q->max_hw_sectors << 9))
307                 return -EIO;
308
309         if (hdr->dxfer_len)
310                 switch (hdr->dxfer_direction) {
311                 default:
312                         return -EINVAL;
313                 case SG_DXFER_TO_DEV:
314                         writing = 1;
315                         break;
316                 case SG_DXFER_TO_FROM_DEV:
317                 case SG_DXFER_FROM_DEV:
318                         break;
319                 }
320
321         rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
322         if (!rq)
323                 return -ENOMEM;
324
325         if (file)
326                 has_write_perm = file->f_mode & FMODE_WRITE;
327
328         if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) {
329                 blk_put_request(rq);
330                 return -EFAULT;
331         }
332
333         if (hdr->iovec_count) {
334                 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
335                 struct sg_iovec *iov;
336
337                 iov = kmalloc(size, GFP_KERNEL);
338                 if (!iov) {
339                         ret = -ENOMEM;
340                         goto out;
341                 }
342
343                 if (copy_from_user(iov, hdr->dxferp, size)) {
344                         kfree(iov);
345                         ret = -EFAULT;
346                         goto out;
347                 }
348
349                 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
350                                           hdr->dxfer_len);
351                 kfree(iov);
352         } else if (hdr->dxfer_len)
353                 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
354
355         if (ret)
356                 goto out;
357
358         bio = rq->bio;
359         memset(sense, 0, sizeof(sense));
360         rq->sense = sense;
361         rq->sense_len = 0;
362         rq->retries = 0;
363
364         start_time = jiffies;
365
366         /* ignore return value. All information is passed back to caller
367          * (if he doesn't check that is his problem).
368          * N.B. a non-zero SCSI status is _not_ necessarily an error.
369          */
370         blk_execute_rq(q, bd_disk, rq, 0);
371
372         hdr->duration = ((jiffies - start_time) * 1000) / HZ;
373
374         return blk_complete_sghdr_rq(rq, hdr, bio);
375 out:
376         blk_put_request(rq);
377         return ret;
378 }
379
380 /**
381  * sg_scsi_ioctl  --  handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
382  * @file:       file this ioctl operates on (optional)
383  * @q:          request queue to send scsi commands down
384  * @disk:       gendisk to operate on (option)
385  * @sic:        userspace structure describing the command to perform
386  *
387  * Send down the scsi command described by @sic to the device below
388  * the request queue @q.  If @file is non-NULL it's used to perform
389  * fine-grained permission checks that allow users to send down
390  * non-destructive SCSI commands.  If the caller has a struct gendisk
391  * available it should be passed in as @disk to allow the low level
392  * driver to use the information contained in it.  A non-NULL @disk
393  * is only allowed if the caller knows that the low level driver doesn't
394  * need it (e.g. in the scsi subsystem).
395  *
396  * Notes:
397  *   -  This interface is deprecated - users should use the SG_IO
398  *      interface instead, as this is a more flexible approach to
399  *      performing SCSI commands on a device.
400  *   -  The SCSI command length is determined by examining the 1st byte
401  *      of the given command. There is no way to override this.
402  *   -  Data transfers are limited to PAGE_SIZE
403  *   -  The length (x + y) must be at least OMAX_SB_LEN bytes long to
404  *      accommodate the sense buffer when an error occurs.
405  *      The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
406  *      old code will not be surprised.
407  *   -  If a Unix error occurs (e.g. ENOMEM) then the user will receive
408  *      a negative return and the Unix error code in 'errno'.
409  *      If the SCSI command succeeds then 0 is returned.
410  *      Positive numbers returned are the compacted SCSI error codes (4
411  *      bytes in one int) where the lowest byte is the SCSI status.
412  */
413 #define OMAX_SB_LEN 16          /* For backward compatibility */
414 int sg_scsi_ioctl(struct file *file, struct request_queue *q,
415                   struct gendisk *disk, struct scsi_ioctl_command __user *sic)
416 {
417         struct request *rq;
418         int err;
419         unsigned int in_len, out_len, bytes, opcode, cmdlen;
420         char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
421
422         if (!sic)
423                 return -EINVAL;
424
425         /*
426          * get in an out lengths, verify they don't exceed a page worth of data
427          */
428         if (get_user(in_len, &sic->inlen))
429                 return -EFAULT;
430         if (get_user(out_len, &sic->outlen))
431                 return -EFAULT;
432         if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
433                 return -EINVAL;
434         if (get_user(opcode, sic->data))
435                 return -EFAULT;
436
437         bytes = max(in_len, out_len);
438         if (bytes) {
439                 buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
440                 if (!buffer)
441                         return -ENOMEM;
442
443                 memset(buffer, 0, bytes);
444         }
445
446         rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
447
448         cmdlen = COMMAND_SIZE(opcode);
449
450         /*
451          * get command and data to send to device, if any
452          */
453         err = -EFAULT;
454         rq->cmd_len = cmdlen;
455         if (copy_from_user(rq->cmd, sic->data, cmdlen))
456                 goto error;
457
458         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
459                 goto error;
460
461         err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
462         if (err)
463                 goto error;
464
465         /* default.  possible overriden later */
466         rq->retries = 5;
467
468         switch (opcode) {
469         case SEND_DIAGNOSTIC:
470         case FORMAT_UNIT:
471                 rq->timeout = FORMAT_UNIT_TIMEOUT;
472                 rq->retries = 1;
473                 break;
474         case START_STOP:
475                 rq->timeout = START_STOP_TIMEOUT;
476                 break;
477         case MOVE_MEDIUM:
478                 rq->timeout = MOVE_MEDIUM_TIMEOUT;
479                 break;
480         case READ_ELEMENT_STATUS:
481                 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
482                 break;
483         case READ_DEFECT_DATA:
484                 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
485                 rq->retries = 1;
486                 break;
487         default:
488                 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
489                 break;
490         }
491
492         if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
493                 err = DRIVER_ERROR << 24;
494                 goto out;
495         }
496
497         memset(sense, 0, sizeof(sense));
498         rq->sense = sense;
499         rq->sense_len = 0;
500         rq->cmd_type = REQ_TYPE_BLOCK_PC;
501
502         blk_execute_rq(q, disk, rq, 0);
503
504 out:
505         err = rq->errors & 0xff;        /* only 8 bit SCSI status */
506         if (err) {
507                 if (rq->sense_len && rq->sense) {
508                         bytes = (OMAX_SB_LEN > rq->sense_len) ?
509                                 rq->sense_len : OMAX_SB_LEN;
510                         if (copy_to_user(sic->data, rq->sense, bytes))
511                                 err = -EFAULT;
512                 }
513         } else {
514                 if (copy_to_user(sic->data, buffer, out_len))
515                         err = -EFAULT;
516         }
517         
518 error:
519         kfree(buffer);
520         blk_put_request(rq);
521         return err;
522 }
523 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
524
525 /* Send basic block requests */
526 static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
527 {
528         struct request *rq;
529         int err;
530
531         rq = blk_get_request(q, WRITE, __GFP_WAIT);
532         rq->cmd_type = REQ_TYPE_BLOCK_PC;
533         rq->data = NULL;
534         rq->data_len = 0;
535         rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
536         memset(rq->cmd, 0, sizeof(rq->cmd));
537         rq->cmd[0] = cmd;
538         rq->cmd[4] = data;
539         rq->cmd_len = 6;
540         err = blk_execute_rq(q, bd_disk, rq, 0);
541         blk_put_request(rq);
542
543         return err;
544 }
545
546 static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
547 {
548         return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
549 }
550
551 int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
552                    struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
553 {
554         int err;
555
556         if (!q || blk_get_queue(q))
557                 return -ENXIO;
558
559         switch (cmd) {
560                 /*
561                  * new sgv3 interface
562                  */
563                 case SG_GET_VERSION_NUM:
564                         err = sg_get_version(arg);
565                         break;
566                 case SCSI_IOCTL_GET_IDLUN:
567                         err = scsi_get_idlun(q, arg);
568                         break;
569                 case SCSI_IOCTL_GET_BUS_NUMBER:
570                         err = scsi_get_bus(q, arg);
571                         break;
572                 case SG_SET_TIMEOUT:
573                         err = sg_set_timeout(q, arg);
574                         break;
575                 case SG_GET_TIMEOUT:
576                         err = sg_get_timeout(q);
577                         break;
578                 case SG_GET_RESERVED_SIZE:
579                         err = sg_get_reserved_size(q, arg);
580                         break;
581                 case SG_SET_RESERVED_SIZE:
582                         err = sg_set_reserved_size(q, arg);
583                         break;
584                 case SG_EMULATED_HOST:
585                         err = sg_emulated_host(q, arg);
586                         break;
587                 case SG_IO: {
588                         struct sg_io_hdr hdr;
589
590                         err = -EFAULT;
591                         if (copy_from_user(&hdr, arg, sizeof(hdr)))
592                                 break;
593                         err = sg_io(file, q, bd_disk, &hdr);
594                         if (err == -EFAULT)
595                                 break;
596
597                         if (copy_to_user(arg, &hdr, sizeof(hdr)))
598                                 err = -EFAULT;
599                         break;
600                 }
601                 case CDROM_SEND_PACKET: {
602                         struct cdrom_generic_command cgc;
603                         struct sg_io_hdr hdr;
604
605                         err = -EFAULT;
606                         if (copy_from_user(&cgc, arg, sizeof(cgc)))
607                                 break;
608                         cgc.timeout = clock_t_to_jiffies(cgc.timeout);
609                         memset(&hdr, 0, sizeof(hdr));
610                         hdr.interface_id = 'S';
611                         hdr.cmd_len = sizeof(cgc.cmd);
612                         hdr.dxfer_len = cgc.buflen;
613                         err = 0;
614                         switch (cgc.data_direction) {
615                                 case CGC_DATA_UNKNOWN:
616                                         hdr.dxfer_direction = SG_DXFER_UNKNOWN;
617                                         break;
618                                 case CGC_DATA_WRITE:
619                                         hdr.dxfer_direction = SG_DXFER_TO_DEV;
620                                         break;
621                                 case CGC_DATA_READ:
622                                         hdr.dxfer_direction = SG_DXFER_FROM_DEV;
623                                         break;
624                                 case CGC_DATA_NONE:
625                                         hdr.dxfer_direction = SG_DXFER_NONE;
626                                         break;
627                                 default:
628                                         err = -EINVAL;
629                         }
630                         if (err)
631                                 break;
632
633                         hdr.dxferp = cgc.buffer;
634                         hdr.sbp = cgc.sense;
635                         if (hdr.sbp)
636                                 hdr.mx_sb_len = sizeof(struct request_sense);
637                         hdr.timeout = cgc.timeout;
638                         hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
639                         hdr.cmd_len = sizeof(cgc.cmd);
640
641                         err = sg_io(file, q, bd_disk, &hdr);
642                         if (err == -EFAULT)
643                                 break;
644
645                         if (hdr.status)
646                                 err = -EIO;
647
648                         cgc.stat = err;
649                         cgc.buflen = hdr.resid;
650                         if (copy_to_user(arg, &cgc, sizeof(cgc)))
651                                 err = -EFAULT;
652
653                         break;
654                 }
655
656                 /*
657                  * old junk scsi send command ioctl
658                  */
659                 case SCSI_IOCTL_SEND_COMMAND:
660                         printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
661                         err = -EINVAL;
662                         if (!arg)
663                                 break;
664
665                         err = sg_scsi_ioctl(file, q, bd_disk, arg);
666                         break;
667                 case CDROMCLOSETRAY:
668                         err = blk_send_start_stop(q, bd_disk, 0x03);
669                         break;
670                 case CDROMEJECT:
671                         err = blk_send_start_stop(q, bd_disk, 0x02);
672                         break;
673                 default:
674                         err = -ENOTTY;
675         }
676
677         blk_put_queue(q);
678         return err;
679 }
680
681 EXPORT_SYMBOL(scsi_cmd_ioctl);