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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[linux-btrfs-devel.git] / block / scsi_ioctl.c
blob4f4230b79bb6ee3c8164e462e40d4bdea3dc1fcd
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 struct blk_cmd_filter {
36 unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
37 unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
38 };
39
40 static struct blk_cmd_filter blk_default_cmd_filter;
41
42 /* Command group 3 is reserved and should never be used. */
43 const unsigned char scsi_command_size_tbl[8] =
44 {
45 6, 10, 10, 12,
46 16, 12, 10, 10
47 };
48 EXPORT_SYMBOL(scsi_command_size_tbl);
49
50 #include <scsi/sg.h>
51
52 static int sg_get_version(int __user *p)
53 {
54 static const int sg_version_num = 30527;
55 return put_user(sg_version_num, p);
56 }
57
58 static int scsi_get_idlun(struct request_queue *q, int __user *p)
59 {
60 return put_user(0, p);
61 }
62
63 static int scsi_get_bus(struct request_queue *q, int __user *p)
64 {
65 return put_user(0, p);
66 }
67
68 static int sg_get_timeout(struct request_queue *q)
69 {
70 return jiffies_to_clock_t(q->sg_timeout);
71 }
72
73 static int sg_set_timeout(struct request_queue *q, int __user *p)
74 {
75 int timeout, err = get_user(timeout, p);
76
77 if (!err)
78 q->sg_timeout = clock_t_to_jiffies(timeout);
79
80 return err;
81 }
82
83 static int sg_get_reserved_size(struct request_queue *q, int __user *p)
84 {
85 unsigned val = min(q->sg_reserved_size, queue_max_sectors(q) << 9);
86
87 return put_user(val, p);
88 }
89
90 static int sg_set_reserved_size(struct request_queue *q, int __user *p)
91 {
92 int size, err = get_user(size, p);
93
94 if (err)
95 return err;
96
97 if (size < 0)
98 return -EINVAL;
99 if (size > (queue_max_sectors(q) << 9))
100 size = queue_max_sectors(q) << 9;
101
102 q->sg_reserved_size = size;
103 return 0;
104 }
105
106 /*
107 * will always return that we are ATAPI even for a real SCSI drive, I'm not
108 * so sure this is worth doing anything about (why would you care??)
109 */
110 static int sg_emulated_host(struct request_queue *q, int __user *p)
111 {
112 return put_user(1, p);
113 }
114
115 static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
116 {
117 /* Basic read-only commands */
118 __set_bit(TEST_UNIT_READY, filter->read_ok);
119 __set_bit(REQUEST_SENSE, filter->read_ok);
120 __set_bit(READ_6, filter->read_ok);
121 __set_bit(READ_10, filter->read_ok);
122 __set_bit(READ_12, filter->read_ok);
123 __set_bit(READ_16, filter->read_ok);
124 __set_bit(READ_BUFFER, filter->read_ok);
125 __set_bit(READ_DEFECT_DATA, filter->read_ok);
126 __set_bit(READ_CAPACITY, filter->read_ok);
127 __set_bit(READ_LONG, filter->read_ok);
128 __set_bit(INQUIRY, filter->read_ok);
129 __set_bit(MODE_SENSE, filter->read_ok);
130 __set_bit(MODE_SENSE_10, filter->read_ok);
131 __set_bit(LOG_SENSE, filter->read_ok);
132 __set_bit(START_STOP, filter->read_ok);
133 __set_bit(GPCMD_VERIFY_10, filter->read_ok);
134 __set_bit(VERIFY_16, filter->read_ok);
135 __set_bit(REPORT_LUNS, filter->read_ok);
136 __set_bit(SERVICE_ACTION_IN, filter->read_ok);
137 __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
138 __set_bit(MAINTENANCE_IN, filter->read_ok);
139 __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
140
141 /* Audio CD commands */
142 __set_bit(GPCMD_PLAY_CD, filter->read_ok);
143 __set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
144 __set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
145 __set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
146 __set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
147
148 /* CD/DVD data reading */
149 __set_bit(GPCMD_READ_CD, filter->read_ok);
150 __set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
151 __set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
152 __set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
153 __set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
154 __set_bit(GPCMD_READ_HEADER, filter->read_ok);
155 __set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
156 __set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
157 __set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
158 __set_bit(GPCMD_REPORT_KEY, filter->read_ok);
159 __set_bit(GPCMD_SCAN, filter->read_ok);
160 __set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
161 __set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
162 __set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
163 __set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
164 __set_bit(GPCMD_SEEK, filter->read_ok);
165 __set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
166
167 /* Basic writing commands */
168 __set_bit(WRITE_6, filter->write_ok);
169 __set_bit(WRITE_10, filter->write_ok);
170 __set_bit(WRITE_VERIFY, filter->write_ok);
171 __set_bit(WRITE_12, filter->write_ok);
172 __set_bit(WRITE_VERIFY_12, filter->write_ok);
173 __set_bit(WRITE_16, filter->write_ok);
174 __set_bit(WRITE_LONG, filter->write_ok);
175 __set_bit(WRITE_LONG_2, filter->write_ok);
176 __set_bit(ERASE, filter->write_ok);
177 __set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
178 __set_bit(MODE_SELECT, filter->write_ok);
179 __set_bit(LOG_SELECT, filter->write_ok);
180 __set_bit(GPCMD_BLANK, filter->write_ok);
181 __set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
182 __set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
183 __set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
184 __set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
185 __set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
186 __set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
187 __set_bit(GPCMD_SEND_EVENT, filter->write_ok);
188 __set_bit(GPCMD_SEND_KEY, filter->write_ok);
189 __set_bit(GPCMD_SEND_OPC, filter->write_ok);
190 __set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
191 __set_bit(GPCMD_SET_SPEED, filter->write_ok);
192 __set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
193 __set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
194 __set_bit(GPCMD_SET_STREAMING, filter->write_ok);
195 __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
196 }
197
198 int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm)
199 {
200 struct blk_cmd_filter *filter = &blk_default_cmd_filter;
201
202 /* root can do any command. */
203 if (capable(CAP_SYS_RAWIO))
204 return 0;
205
206 /* if there's no filter set, assume we're filtering everything out */
207 if (!filter)
208 return -EPERM;
209
210 /* Anybody who can open the device can do a read-safe command */
211 if (test_bit(cmd[0], filter->read_ok))
212 return 0;
213
214 /* Write-safe commands require a writable open */
215 if (test_bit(cmd[0], filter->write_ok) && has_write_perm)
216 return 0;
217
218 return -EPERM;
219 }
220 EXPORT_SYMBOL(blk_verify_command);
221
222 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
223 struct sg_io_hdr *hdr, fmode_t mode)
224 {
225 if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
226 return -EFAULT;
227 if (blk_verify_command(rq->cmd, mode & FMODE_WRITE))
228 return -EPERM;
229
230 /*
231 * fill in request structure
232 */
233 rq->cmd_len = hdr->cmd_len;
234 rq->cmd_type = REQ_TYPE_BLOCK_PC;
235
236 rq->timeout = msecs_to_jiffies(hdr->timeout);
237 if (!rq->timeout)
238 rq->timeout = q->sg_timeout;
239 if (!rq->timeout)
240 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
241 if (rq->timeout < BLK_MIN_SG_TIMEOUT)
242 rq->timeout = BLK_MIN_SG_TIMEOUT;
243
244 return 0;
245 }
246
247 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
248 struct bio *bio)
249 {
250 int r, ret = 0;
251
252 /*
253 * fill in all the output members
254 */
255 hdr->status = rq->errors & 0xff;
256 hdr->masked_status = status_byte(rq->errors);
257 hdr->msg_status = msg_byte(rq->errors);
258 hdr->host_status = host_byte(rq->errors);
259 hdr->driver_status = driver_byte(rq->errors);
260 hdr->info = 0;
261 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
262 hdr->info |= SG_INFO_CHECK;
263 hdr->resid = rq->resid_len;
264 hdr->sb_len_wr = 0;
265
266 if (rq->sense_len && hdr->sbp) {
267 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
268
269 if (!copy_to_user(hdr->sbp, rq->sense, len))
270 hdr->sb_len_wr = len;
271 else
272 ret = -EFAULT;
273 }
274
275 r = blk_rq_unmap_user(bio);
276 if (!ret)
277 ret = r;
278 blk_put_request(rq);
279
280 return ret;
281 }
282
283 static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
284 struct sg_io_hdr *hdr, fmode_t mode)
285 {
286 unsigned long start_time;
287 int writing = 0, ret = 0;
288 struct request *rq;
289 char sense[SCSI_SENSE_BUFFERSIZE];
290 struct bio *bio;
291
292 if (hdr->interface_id != 'S')
293 return -EINVAL;
294 if (hdr->cmd_len > BLK_MAX_CDB)
295 return -EINVAL;
296
297 if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
298 return -EIO;
299
300 if (hdr->dxfer_len)
301 switch (hdr->dxfer_direction) {
302 default:
303 return -EINVAL;
304 case SG_DXFER_TO_DEV:
305 writing = 1;
306 break;
307 case SG_DXFER_TO_FROM_DEV:
308 case SG_DXFER_FROM_DEV:
309 break;
310 }
311
312 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
313 if (!rq)
314 return -ENOMEM;
315
316 if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
317 blk_put_request(rq);
318 return -EFAULT;
319 }
320
321 if (hdr->iovec_count) {
322 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
323 size_t iov_data_len;
324 struct sg_iovec *sg_iov;
325 struct iovec *iov;
326 int i;
327
328 sg_iov = kmalloc(size, GFP_KERNEL);
329 if (!sg_iov) {
330 ret = -ENOMEM;
331 goto out;
332 }
333
334 if (copy_from_user(sg_iov, hdr->dxferp, size)) {
335 kfree(sg_iov);
336 ret = -EFAULT;
337 goto out;
338 }
339
340 /*
341 * Sum up the vecs, making sure they don't overflow
342 */
343 iov = (struct iovec *) sg_iov;
344 iov_data_len = 0;
345 for (i = 0; i < hdr->iovec_count; i++) {
346 if (iov_data_len + iov[i].iov_len < iov_data_len) {
347 kfree(sg_iov);
348 ret = -EINVAL;
349 goto out;
350 }
351 iov_data_len += iov[i].iov_len;
352 }
353
354 /* SG_IO howto says that the shorter of the two wins */
355 if (hdr->dxfer_len < iov_data_len) {
356 hdr->iovec_count = iov_shorten(iov,
357 hdr->iovec_count,
358 hdr->dxfer_len);
359 iov_data_len = hdr->dxfer_len;
360 }
361
362 ret = blk_rq_map_user_iov(q, rq, NULL, sg_iov, hdr->iovec_count,
363 iov_data_len, GFP_KERNEL);
364 kfree(sg_iov);
365 } else if (hdr->dxfer_len)
366 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
367 GFP_KERNEL);
368
369 if (ret)
370 goto out;
371
372 bio = rq->bio;
373 memset(sense, 0, sizeof(sense));
374 rq->sense = sense;
375 rq->sense_len = 0;
376 rq->retries = 0;
377
378 start_time = jiffies;
379
380 /* ignore return value. All information is passed back to caller
381 * (if he doesn't check that is his problem).
382 * N.B. a non-zero SCSI status is _not_ necessarily an error.
383 */
384 blk_execute_rq(q, bd_disk, rq, 0);
385
386 hdr->duration = jiffies_to_msecs(jiffies - start_time);
387
388 return blk_complete_sghdr_rq(rq, hdr, bio);
389 out:
390 blk_put_request(rq);
391 return ret;
392 }
393
394 /**
395 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
396 * @file: file this ioctl operates on (optional)
397 * @q: request queue to send scsi commands down
398 * @disk: gendisk to operate on (option)
399 * @sic: userspace structure describing the command to perform
400 *
401 * Send down the scsi command described by @sic to the device below
402 * the request queue @q. If @file is non-NULL it's used to perform
403 * fine-grained permission checks that allow users to send down
404 * non-destructive SCSI commands. If the caller has a struct gendisk
405 * available it should be passed in as @disk to allow the low level
406 * driver to use the information contained in it. A non-NULL @disk
407 * is only allowed if the caller knows that the low level driver doesn't
408 * need it (e.g. in the scsi subsystem).
409 *
410 * Notes:
411 * - This interface is deprecated - users should use the SG_IO
412 * interface instead, as this is a more flexible approach to
413 * performing SCSI commands on a device.
414 * - The SCSI command length is determined by examining the 1st byte
415 * of the given command. There is no way to override this.
416 * - Data transfers are limited to PAGE_SIZE
417 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
418 * accommodate the sense buffer when an error occurs.
419 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
420 * old code will not be surprised.
421 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
422 * a negative return and the Unix error code in 'errno'.
423 * If the SCSI command succeeds then 0 is returned.
424 * Positive numbers returned are the compacted SCSI error codes (4
425 * bytes in one int) where the lowest byte is the SCSI status.
426 */
427 #define OMAX_SB_LEN 16 /* For backward compatibility */
428 int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
429 struct scsi_ioctl_command __user *sic)
430 {
431 struct request *rq;
432 int err;
433 unsigned int in_len, out_len, bytes, opcode, cmdlen;
434 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
435
436 if (!sic)
437 return -EINVAL;
438
439 /*
440 * get in an out lengths, verify they don't exceed a page worth of data
441 */
442 if (get_user(in_len, &sic->inlen))
443 return -EFAULT;
444 if (get_user(out_len, &sic->outlen))
445 return -EFAULT;
446 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
447 return -EINVAL;
448 if (get_user(opcode, sic->data))
449 return -EFAULT;
450
451 bytes = max(in_len, out_len);
452 if (bytes) {
453 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
454 if (!buffer)
455 return -ENOMEM;
456
457 }
458
459 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
460
461 cmdlen = COMMAND_SIZE(opcode);
462
463 /*
464 * get command and data to send to device, if any
465 */
466 err = -EFAULT;
467 rq->cmd_len = cmdlen;
468 if (copy_from_user(rq->cmd, sic->data, cmdlen))
469 goto error;
470
471 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
472 goto error;
473
474 err = blk_verify_command(rq->cmd, mode & FMODE_WRITE);
475 if (err)
476 goto error;
477
478 /* default. possible overriden later */
479 rq->retries = 5;
480
481 switch (opcode) {
482 case SEND_DIAGNOSTIC:
483 case FORMAT_UNIT:
484 rq->timeout = FORMAT_UNIT_TIMEOUT;
485 rq->retries = 1;
486 break;
487 case START_STOP:
488 rq->timeout = START_STOP_TIMEOUT;
489 break;
490 case MOVE_MEDIUM:
491 rq->timeout = MOVE_MEDIUM_TIMEOUT;
492 break;
493 case READ_ELEMENT_STATUS:
494 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
495 break;
496 case READ_DEFECT_DATA:
497 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
498 rq->retries = 1;
499 break;
500 default:
501 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
502 break;
503 }
504
505 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
506 err = DRIVER_ERROR << 24;
507 goto out;
508 }
509
510 memset(sense, 0, sizeof(sense));
511 rq->sense = sense;
512 rq->sense_len = 0;
513 rq->cmd_type = REQ_TYPE_BLOCK_PC;
514
515 blk_execute_rq(q, disk, rq, 0);
516
517 out:
518 err = rq->errors & 0xff; /* only 8 bit SCSI status */
519 if (err) {
520 if (rq->sense_len && rq->sense) {
521 bytes = (OMAX_SB_LEN > rq->sense_len) ?
522 rq->sense_len : OMAX_SB_LEN;
523 if (copy_to_user(sic->data, rq->sense, bytes))
524 err = -EFAULT;
525 }
526 } else {
527 if (copy_to_user(sic->data, buffer, out_len))
528 err = -EFAULT;
529 }
530
531 error:
532 kfree(buffer);
533 blk_put_request(rq);
534 return err;
535 }
536 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
537
538 /* Send basic block requests */
539 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
540 int cmd, int data)
541 {
542 struct request *rq;
543 int err;
544
545 rq = blk_get_request(q, WRITE, __GFP_WAIT);
546 rq->cmd_type = REQ_TYPE_BLOCK_PC;
547 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
548 rq->cmd[0] = cmd;
549 rq->cmd[4] = data;
550 rq->cmd_len = 6;
551 err = blk_execute_rq(q, bd_disk, rq, 0);
552 blk_put_request(rq);
553
554 return err;
555 }
556
557 static inline int blk_send_start_stop(struct request_queue *q,
558 struct gendisk *bd_disk, int data)
559 {
560 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
561 }
562
563 int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
564 unsigned int cmd, void __user *arg)
565 {
566 int err;
567
568 if (!q || blk_get_queue(q))
569 return -ENXIO;
570
571 switch (cmd) {
572 /*
573 * new sgv3 interface
574 */
575 case SG_GET_VERSION_NUM:
576 err = sg_get_version(arg);
577 break;
578 case SCSI_IOCTL_GET_IDLUN:
579 err = scsi_get_idlun(q, arg);
580 break;
581 case SCSI_IOCTL_GET_BUS_NUMBER:
582 err = scsi_get_bus(q, arg);
583 break;
584 case SG_SET_TIMEOUT:
585 err = sg_set_timeout(q, arg);
586 break;
587 case SG_GET_TIMEOUT:
588 err = sg_get_timeout(q);
589 break;
590 case SG_GET_RESERVED_SIZE:
591 err = sg_get_reserved_size(q, arg);
592 break;
593 case SG_SET_RESERVED_SIZE:
594 err = sg_set_reserved_size(q, arg);
595 break;
596 case SG_EMULATED_HOST:
597 err = sg_emulated_host(q, arg);
598 break;
599 case SG_IO: {
600 struct sg_io_hdr hdr;
601
602 err = -EFAULT;
603 if (copy_from_user(&hdr, arg, sizeof(hdr)))
604 break;
605 err = sg_io(q, bd_disk, &hdr, mode);
606 if (err == -EFAULT)
607 break;
608
609 if (copy_to_user(arg, &hdr, sizeof(hdr)))
610 err = -EFAULT;
611 break;
612 }
613 case CDROM_SEND_PACKET: {
614 struct cdrom_generic_command cgc;
615 struct sg_io_hdr hdr;
616
617 err = -EFAULT;
618 if (copy_from_user(&cgc, arg, sizeof(cgc)))
619 break;
620 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
621 memset(&hdr, 0, sizeof(hdr));
622 hdr.interface_id = 'S';
623 hdr.cmd_len = sizeof(cgc.cmd);
624 hdr.dxfer_len = cgc.buflen;
625 err = 0;
626 switch (cgc.data_direction) {
627 case CGC_DATA_UNKNOWN:
628 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
629 break;
630 case CGC_DATA_WRITE:
631 hdr.dxfer_direction = SG_DXFER_TO_DEV;
632 break;
633 case CGC_DATA_READ:
634 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
635 break;
636 case CGC_DATA_NONE:
637 hdr.dxfer_direction = SG_DXFER_NONE;
638 break;
639 default:
640 err = -EINVAL;
641 }
642 if (err)
643 break;
644
645 hdr.dxferp = cgc.buffer;
646 hdr.sbp = cgc.sense;
647 if (hdr.sbp)
648 hdr.mx_sb_len = sizeof(struct request_sense);
649 hdr.timeout = jiffies_to_msecs(cgc.timeout);
650 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
651 hdr.cmd_len = sizeof(cgc.cmd);
652
653 err = sg_io(q, bd_disk, &hdr, mode);
654 if (err == -EFAULT)
655 break;
656
657 if (hdr.status)
658 err = -EIO;
659
660 cgc.stat = err;
661 cgc.buflen = hdr.resid;
662 if (copy_to_user(arg, &cgc, sizeof(cgc)))
663 err = -EFAULT;
664
665 break;
666 }
667
668 /*
669 * old junk scsi send command ioctl
670 */
671 case SCSI_IOCTL_SEND_COMMAND:
672 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
673 err = -EINVAL;
674 if (!arg)
675 break;
676
677 err = sg_scsi_ioctl(q, bd_disk, mode, arg);
678 break;
679 case CDROMCLOSETRAY:
680 err = blk_send_start_stop(q, bd_disk, 0x03);
681 break;
682 case CDROMEJECT:
683 err = blk_send_start_stop(q, bd_disk, 0x02);
684 break;
685 default:
686 err = -ENOTTY;
687 }
688
689 blk_put_queue(q);
690 return err;
691 }
692 EXPORT_SYMBOL(scsi_cmd_ioctl);
693
694 static int __init blk_scsi_ioctl_init(void)
695 {
696 blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
697 return 0;
698 }
699 fs_initcall(blk_scsi_ioctl_init);
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