blob: 5493c2fbbab177335814a24362b95763eb5dc820 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public Licens
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
17 *
18 */
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/string.h>
22#include <linux/module.h>
23#include <linux/blkdev.h>
Randy.Dunlapc59ede72006-01-11 12:17:46 -080024#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#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. */
36const unsigned char scsi_command_size[8] =
37{
38 6, 10, 10, 12,
39 16, 12, 10, 10
40};
41
42EXPORT_SYMBOL(scsi_command_size);
43
44#define BLK_DEFAULT_TIMEOUT (60 * HZ)
45
46#include <scsi/sg.h>
47
48static int sg_get_version(int __user *p)
49{
Arjan van de Ven64100092006-01-06 09:46:02 +010050 static const int sg_version_num = 30527;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 return put_user(sg_version_num, p);
52}
53
54static int scsi_get_idlun(request_queue_t *q, int __user *p)
55{
56 return put_user(0, p);
57}
58
59static int scsi_get_bus(request_queue_t *q, int __user *p)
60{
61 return put_user(0, p);
62}
63
64static int sg_get_timeout(request_queue_t *q)
65{
66 return q->sg_timeout / (HZ / USER_HZ);
67}
68
69static int sg_set_timeout(request_queue_t *q, int __user *p)
70{
71 int timeout, err = get_user(timeout, p);
72
73 if (!err)
74 q->sg_timeout = timeout * (HZ / USER_HZ);
75
76 return err;
77}
78
79static int sg_get_reserved_size(request_queue_t *q, int __user *p)
80{
81 return put_user(q->sg_reserved_size, p);
82}
83
84static 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 */
104static 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
115static int verify_command(struct file *file, unsigned char *cmd)
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),
Douglas Gilbert942fc2f2005-09-09 20:07:32 +1000127 safe_for_read(READ_DEFECT_DATA),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 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),
Thomas Maguin0faf3d32005-09-16 19:27:58 -0700172 safe_for_write(WRITE_LONG_2),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 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]];
Jens Axboe5a57be82006-01-09 14:52:21 +0100194 int has_write_perm = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 /* Anybody who can open the device can do a read-safe command */
197 if (type & CMD_READ_SAFE)
198 return 0;
199
Jens Axboe5a57be82006-01-09 14:52:21 +0100200 /*
201 * file can be NULL from ioctl_by_bdev()...
202 */
203 if (file)
204 has_write_perm = file->f_mode & FMODE_WRITE;
205
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 /* Write-safe commands just require a writable open.. */
Jens Axboe5a57be82006-01-09 14:52:21 +0100207 if ((type & CMD_WRITE_SAFE) && has_write_perm)
208 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Jens Axboe3b0e77b2005-10-07 19:41:34 +0200210 /* And root can do any command.. */
211 if (capable(CAP_SYS_RAWIO))
212 return 0;
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 if (!type) {
215 cmd_type[cmd[0]] = CMD_WARNED;
216 printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
217 }
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* Otherwise fail it with an "Operation not permitted" */
220 return -EPERM;
221}
222
223static int sg_io(struct file *file, request_queue_t *q,
224 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
225{
226 unsigned long start_time;
Jens Axboef63eb212005-06-20 14:10:25 +0200227 int writing = 0, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 char sense[SCSI_SENSE_BUFFERSIZE];
230 unsigned char cmd[BLK_MAX_CDB];
231
232 if (hdr->interface_id != 'S')
233 return -EINVAL;
234 if (hdr->cmd_len > BLK_MAX_CDB)
235 return -EINVAL;
236 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
237 return -EFAULT;
238 if (verify_command(file, cmd))
239 return -EPERM;
240
Mike Christiedefd94b2005-12-05 02:37:06 -0600241 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 return -EIO;
243
James Bottomley f1970ba2005-06-20 14:06:52 +0200244 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 switch (hdr->dxfer_direction) {
246 default:
247 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 case SG_DXFER_TO_DEV:
249 writing = 1;
250 break;
Jens Axboe616e8a02006-11-13 18:04:59 +0100251 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 break;
254 }
255
Jens Axboedd1cab92005-06-20 14:06:01 +0200256 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
257 if (!rq)
258 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Mike Christie0e75f902006-12-01 10:40:55 +0100260 /*
261 * fill in request structure
262 */
263 rq->cmd_len = hdr->cmd_len;
264 memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
265 memcpy(rq->cmd, cmd, hdr->cmd_len);
266
267 memset(sense, 0, sizeof(sense));
268 rq->sense = sense;
269 rq->sense_len = 0;
270
271 rq->cmd_type = REQ_TYPE_BLOCK_PC;
272
273 /*
274 * bounce this after holding a reference to the original bio, it's
275 * needed for proper unmapping
276 */
277 if (rq->bio)
278 blk_queue_bounce(q, &rq->bio);
279
280 rq->timeout = (hdr->timeout * HZ) / 1000;
281 if (!rq->timeout)
282 rq->timeout = q->sg_timeout;
283 if (!rq->timeout)
284 rq->timeout = BLK_DEFAULT_TIMEOUT;
285
James Bottomley f1970ba2005-06-20 14:06:52 +0200286 if (hdr->iovec_count) {
287 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
288 struct sg_iovec *iov;
289
290 iov = kmalloc(size, GFP_KERNEL);
291 if (!iov) {
292 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200293 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200294 }
295
296 if (copy_from_user(iov, hdr->dxferp, size)) {
297 kfree(iov);
298 ret = -EFAULT;
299 goto out;
300 }
301
Mike Christie0e75f902006-12-01 10:40:55 +0100302 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
303 hdr->dxfer_len);
James Bottomley f1970ba2005-06-20 14:06:52 +0200304 kfree(iov);
305 } else if (hdr->dxfer_len)
306 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
307
308 if (ret)
309 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Jens Axboe01840f92006-02-03 08:37:08 +0100311 rq->retries = 0;
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 start_time = jiffies;
314
315 /* ignore return value. All information is passed back to caller
316 * (if he doesn't check that is his problem).
317 * N.B. a non-zero SCSI status is _not_ necessarily an error.
318 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200319 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 /* write to all output members */
322 hdr->status = 0xff & rq->errors;
323 hdr->masked_status = status_byte(rq->errors);
324 hdr->msg_status = msg_byte(rq->errors);
325 hdr->host_status = host_byte(rq->errors);
326 hdr->driver_status = driver_byte(rq->errors);
327 hdr->info = 0;
328 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
329 hdr->info |= SG_INFO_CHECK;
330 hdr->resid = rq->data_len;
331 hdr->duration = ((jiffies - start_time) * 1000) / HZ;
332 hdr->sb_len_wr = 0;
333
334 if (rq->sense_len && hdr->sbp) {
335 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
336
337 if (!copy_to_user(hdr->sbp, rq->sense, len))
338 hdr->sb_len_wr = len;
339 }
340
Mike Christie0e75f902006-12-01 10:40:55 +0100341 if (blk_rq_unmap_user(rq))
Jens Axboedd1cab92005-06-20 14:06:01 +0200342 ret = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344 /* may not have succeeded, but output values written to control
345 * structure (struct sg_io_hdr). */
Jens Axboedd1cab92005-06-20 14:06:01 +0200346out:
347 blk_put_request(rq);
348 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349}
350
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100351/**
352 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
353 * @file: file this ioctl operates on (optional)
354 * @q: request queue to send scsi commands down
355 * @disk: gendisk to operate on (option)
356 * @sic: userspace structure describing the command to perform
357 *
358 * Send down the scsi command described by @sic to the device below
359 * the request queue @q. If @file is non-NULL it's used to perform
360 * fine-grained permission checks that allow users to send down
361 * non-destructive SCSI commands. If the caller has a struct gendisk
362 * available it should be passed in as @disk to allow the low level
363 * driver to use the information contained in it. A non-NULL @disk
364 * is only allowed if the caller knows that the low level driver doesn't
365 * need it (e.g. in the scsi subsystem).
366 *
367 * Notes:
368 * - This interface is deprecated - users should use the SG_IO
369 * interface instead, as this is a more flexible approach to
370 * performing SCSI commands on a device.
371 * - The SCSI command length is determined by examining the 1st byte
372 * of the given command. There is no way to override this.
373 * - Data transfers are limited to PAGE_SIZE
374 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
375 * accommodate the sense buffer when an error occurs.
376 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
377 * old code will not be surprised.
378 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
379 * a negative return and the Unix error code in 'errno'.
380 * If the SCSI command succeeds then 0 is returned.
381 * Positive numbers returned are the compacted SCSI error codes (4
382 * bytes in one int) where the lowest byte is the SCSI status.
383 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384#define OMAX_SB_LEN 16 /* For backward compatibility */
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100385int sg_scsi_ioctl(struct file *file, struct request_queue *q,
386 struct gendisk *disk, struct scsi_ioctl_command __user *sic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387{
388 struct request *rq;
389 int err;
390 unsigned int in_len, out_len, bytes, opcode, cmdlen;
391 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
392
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100393 if (!sic)
394 return -EINVAL;
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 /*
397 * get in an out lengths, verify they don't exceed a page worth of data
398 */
399 if (get_user(in_len, &sic->inlen))
400 return -EFAULT;
401 if (get_user(out_len, &sic->outlen))
402 return -EFAULT;
403 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
404 return -EINVAL;
405 if (get_user(opcode, sic->data))
406 return -EFAULT;
407
408 bytes = max(in_len, out_len);
409 if (bytes) {
410 buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
411 if (!buffer)
412 return -ENOMEM;
413
414 memset(buffer, 0, bytes);
415 }
416
417 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
418
419 cmdlen = COMMAND_SIZE(opcode);
420
421 /*
422 * get command and data to send to device, if any
423 */
424 err = -EFAULT;
425 rq->cmd_len = cmdlen;
426 if (copy_from_user(rq->cmd, sic->data, cmdlen))
427 goto error;
428
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100429 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 goto error;
431
432 err = verify_command(file, rq->cmd);
433 if (err)
434 goto error;
435
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100436 /* default. possible overriden later */
437 rq->retries = 5;
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 switch (opcode) {
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100440 case SEND_DIAGNOSTIC:
441 case FORMAT_UNIT:
442 rq->timeout = FORMAT_UNIT_TIMEOUT;
443 rq->retries = 1;
444 break;
445 case START_STOP:
446 rq->timeout = START_STOP_TIMEOUT;
447 break;
448 case MOVE_MEDIUM:
449 rq->timeout = MOVE_MEDIUM_TIMEOUT;
450 break;
451 case READ_ELEMENT_STATUS:
452 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
453 break;
454 case READ_DEFECT_DATA:
455 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
456 rq->retries = 1;
457 break;
458 default:
459 rq->timeout = BLK_DEFAULT_TIMEOUT;
460 break;
461 }
462
463 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
464 err = DRIVER_ERROR << 24;
465 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 }
467
468 memset(sense, 0, sizeof(sense));
469 rq->sense = sense;
470 rq->sense_len = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200471 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100473 blk_execute_rq(q, disk, rq, 0);
474
475out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 err = rq->errors & 0xff; /* only 8 bit SCSI status */
477 if (err) {
478 if (rq->sense_len && rq->sense) {
479 bytes = (OMAX_SB_LEN > rq->sense_len) ?
480 rq->sense_len : OMAX_SB_LEN;
481 if (copy_to_user(sic->data, rq->sense, bytes))
482 err = -EFAULT;
483 }
484 } else {
485 if (copy_to_user(sic->data, buffer, out_len))
486 err = -EFAULT;
487 }
488
489error:
490 kfree(buffer);
491 blk_put_request(rq);
492 return err;
493}
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100494EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
Ben Collinsf98d2df2005-12-19 11:49:24 -0800495
496/* Send basic block requests */
497static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
498{
499 struct request *rq;
500 int err;
501
502 rq = blk_get_request(q, WRITE, __GFP_WAIT);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200503 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800504 rq->data = NULL;
505 rq->data_len = 0;
506 rq->timeout = BLK_DEFAULT_TIMEOUT;
507 memset(rq->cmd, 0, sizeof(rq->cmd));
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
517static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
518{
519 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
520}
521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
523{
524 request_queue_t *q;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800525 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527 q = bd_disk->queue;
528 if (!q)
529 return -ENXIO;
530
531 if (blk_get_queue(q))
532 return -ENXIO;
533
534 switch (cmd) {
535 /*
536 * new sgv3 interface
537 */
538 case SG_GET_VERSION_NUM:
539 err = sg_get_version(arg);
540 break;
541 case SCSI_IOCTL_GET_IDLUN:
542 err = scsi_get_idlun(q, arg);
543 break;
544 case SCSI_IOCTL_GET_BUS_NUMBER:
545 err = scsi_get_bus(q, arg);
546 break;
547 case SG_SET_TIMEOUT:
548 err = sg_set_timeout(q, arg);
549 break;
550 case SG_GET_TIMEOUT:
551 err = sg_get_timeout(q);
552 break;
553 case SG_GET_RESERVED_SIZE:
554 err = sg_get_reserved_size(q, arg);
555 break;
556 case SG_SET_RESERVED_SIZE:
557 err = sg_set_reserved_size(q, arg);
558 break;
559 case SG_EMULATED_HOST:
560 err = sg_emulated_host(q, arg);
561 break;
562 case SG_IO: {
563 struct sg_io_hdr hdr;
564
565 err = -EFAULT;
566 if (copy_from_user(&hdr, arg, sizeof(hdr)))
567 break;
568 err = sg_io(file, q, bd_disk, &hdr);
569 if (err == -EFAULT)
570 break;
571
572 if (copy_to_user(arg, &hdr, sizeof(hdr)))
573 err = -EFAULT;
574 break;
575 }
576 case CDROM_SEND_PACKET: {
577 struct cdrom_generic_command cgc;
578 struct sg_io_hdr hdr;
579
580 err = -EFAULT;
581 if (copy_from_user(&cgc, arg, sizeof(cgc)))
582 break;
583 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
584 memset(&hdr, 0, sizeof(hdr));
585 hdr.interface_id = 'S';
586 hdr.cmd_len = sizeof(cgc.cmd);
587 hdr.dxfer_len = cgc.buflen;
588 err = 0;
589 switch (cgc.data_direction) {
590 case CGC_DATA_UNKNOWN:
591 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
592 break;
593 case CGC_DATA_WRITE:
594 hdr.dxfer_direction = SG_DXFER_TO_DEV;
595 break;
596 case CGC_DATA_READ:
597 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
598 break;
599 case CGC_DATA_NONE:
600 hdr.dxfer_direction = SG_DXFER_NONE;
601 break;
602 default:
603 err = -EINVAL;
604 }
605 if (err)
606 break;
607
608 hdr.dxferp = cgc.buffer;
609 hdr.sbp = cgc.sense;
610 if (hdr.sbp)
611 hdr.mx_sb_len = sizeof(struct request_sense);
612 hdr.timeout = cgc.timeout;
613 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
614 hdr.cmd_len = sizeof(cgc.cmd);
615
616 err = sg_io(file, q, bd_disk, &hdr);
617 if (err == -EFAULT)
618 break;
619
620 if (hdr.status)
621 err = -EIO;
622
623 cgc.stat = err;
624 cgc.buflen = hdr.resid;
625 if (copy_to_user(arg, &cgc, sizeof(cgc)))
626 err = -EFAULT;
627
628 break;
629 }
630
631 /*
632 * old junk scsi send command ioctl
633 */
634 case SCSI_IOCTL_SEND_COMMAND:
635 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
636 err = -EINVAL;
637 if (!arg)
638 break;
639
640 err = sg_scsi_ioctl(file, q, bd_disk, arg);
641 break;
642 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800643 err = blk_send_start_stop(q, bd_disk, 0x03);
644 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800646 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 break;
648 default:
649 err = -ENOTTY;
650 }
651
652 blk_put_queue(q);
653 return err;
654}
655
656EXPORT_SYMBOL(scsi_cmd_ioctl);