blob: f322b6a441d82fbe7db9a177ac0837fc54618cf2 [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];
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100231 struct bio *bio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 if (hdr->interface_id != 'S')
234 return -EINVAL;
235 if (hdr->cmd_len > BLK_MAX_CDB)
236 return -EINVAL;
237 if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
238 return -EFAULT;
239 if (verify_command(file, cmd))
240 return -EPERM;
241
Mike Christiedefd94b2005-12-05 02:37:06 -0600242 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 return -EIO;
244
James Bottomley f1970ba2005-06-20 14:06:52 +0200245 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 switch (hdr->dxfer_direction) {
247 default:
248 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 case SG_DXFER_TO_DEV:
250 writing = 1;
251 break;
Jens Axboe616e8a02006-11-13 18:04:59 +0100252 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 break;
255 }
256
Jens Axboedd1cab92005-06-20 14:06:01 +0200257 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
258 if (!rq)
259 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Mike Christie0e75f902006-12-01 10:40:55 +0100261 /*
262 * fill in request structure
263 */
264 rq->cmd_len = hdr->cmd_len;
265 memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
266 memcpy(rq->cmd, cmd, hdr->cmd_len);
267
268 memset(sense, 0, sizeof(sense));
269 rq->sense = sense;
270 rq->sense_len = 0;
271
272 rq->cmd_type = REQ_TYPE_BLOCK_PC;
273
Linus Torvaldsec0bf392006-12-05 16:09:46 -0800274 rq->timeout = jiffies_to_msecs(hdr->timeout);
Mike Christie0e75f902006-12-01 10:40:55 +0100275 if (!rq->timeout)
276 rq->timeout = q->sg_timeout;
277 if (!rq->timeout)
278 rq->timeout = BLK_DEFAULT_TIMEOUT;
279
James Bottomley f1970ba2005-06-20 14:06:52 +0200280 if (hdr->iovec_count) {
281 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
282 struct sg_iovec *iov;
283
284 iov = kmalloc(size, GFP_KERNEL);
285 if (!iov) {
286 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200287 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200288 }
289
290 if (copy_from_user(iov, hdr->dxferp, size)) {
291 kfree(iov);
292 ret = -EFAULT;
293 goto out;
294 }
295
Mike Christie0e75f902006-12-01 10:40:55 +0100296 ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
297 hdr->dxfer_len);
James Bottomley f1970ba2005-06-20 14:06:52 +0200298 kfree(iov);
299 } else if (hdr->dxfer_len)
300 ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
301
302 if (ret)
303 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100305 bio = rq->bio;
Jens Axboe01840f92006-02-03 08:37:08 +0100306 rq->retries = 0;
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 start_time = jiffies;
309
310 /* ignore return value. All information is passed back to caller
311 * (if he doesn't check that is his problem).
312 * N.B. a non-zero SCSI status is _not_ necessarily an error.
313 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200314 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316 /* write to all output members */
317 hdr->status = 0xff & rq->errors;
318 hdr->masked_status = status_byte(rq->errors);
319 hdr->msg_status = msg_byte(rq->errors);
320 hdr->host_status = host_byte(rq->errors);
321 hdr->driver_status = driver_byte(rq->errors);
322 hdr->info = 0;
323 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
324 hdr->info |= SG_INFO_CHECK;
325 hdr->resid = rq->data_len;
326 hdr->duration = ((jiffies - start_time) * 1000) / HZ;
327 hdr->sb_len_wr = 0;
328
329 if (rq->sense_len && hdr->sbp) {
330 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
331
332 if (!copy_to_user(hdr->sbp, rq->sense, len))
333 hdr->sb_len_wr = len;
334 }
335
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100336 rq->bio = bio;
Mike Christie0e75f902006-12-01 10:40:55 +0100337 if (blk_rq_unmap_user(rq))
Jens Axboedd1cab92005-06-20 14:06:01 +0200338 ret = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 /* may not have succeeded, but output values written to control
341 * structure (struct sg_io_hdr). */
Jens Axboedd1cab92005-06-20 14:06:01 +0200342out:
343 blk_put_request(rq);
344 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345}
346
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100347/**
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380#define OMAX_SB_LEN 16 /* For backward compatibility */
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100381int sg_scsi_ioctl(struct file *file, struct request_queue *q,
382 struct gendisk *disk, struct scsi_ioctl_command __user *sic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
384 struct request *rq;
385 int err;
386 unsigned int in_len, out_len, bytes, opcode, cmdlen;
387 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
388
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100389 if (!sic)
390 return -EINVAL;
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 /*
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 = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
407 if (!buffer)
408 return -ENOMEM;
409
410 memset(buffer, 0, bytes);
411 }
412
413 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
414
415 cmdlen = COMMAND_SIZE(opcode);
416
417 /*
418 * get command and data to send to device, if any
419 */
420 err = -EFAULT;
421 rq->cmd_len = cmdlen;
422 if (copy_from_user(rq->cmd, sic->data, cmdlen))
423 goto error;
424
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100425 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 goto error;
427
428 err = verify_command(file, rq->cmd);
429 if (err)
430 goto error;
431
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100432 /* default. possible overriden later */
433 rq->retries = 5;
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 switch (opcode) {
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100436 case SEND_DIAGNOSTIC:
437 case FORMAT_UNIT:
438 rq->timeout = FORMAT_UNIT_TIMEOUT;
439 rq->retries = 1;
440 break;
441 case START_STOP:
442 rq->timeout = START_STOP_TIMEOUT;
443 break;
444 case MOVE_MEDIUM:
445 rq->timeout = MOVE_MEDIUM_TIMEOUT;
446 break;
447 case READ_ELEMENT_STATUS:
448 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
449 break;
450 case READ_DEFECT_DATA:
451 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
452 rq->retries = 1;
453 break;
454 default:
455 rq->timeout = BLK_DEFAULT_TIMEOUT;
456 break;
457 }
458
459 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
460 err = DRIVER_ERROR << 24;
461 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
463
464 memset(sense, 0, sizeof(sense));
465 rq->sense = sense;
466 rq->sense_len = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200467 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100469 blk_execute_rq(q, disk, rq, 0);
470
471out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 err = rq->errors & 0xff; /* only 8 bit SCSI status */
473 if (err) {
474 if (rq->sense_len && rq->sense) {
475 bytes = (OMAX_SB_LEN > rq->sense_len) ?
476 rq->sense_len : OMAX_SB_LEN;
477 if (copy_to_user(sic->data, rq->sense, bytes))
478 err = -EFAULT;
479 }
480 } else {
481 if (copy_to_user(sic->data, buffer, out_len))
482 err = -EFAULT;
483 }
484
485error:
486 kfree(buffer);
487 blk_put_request(rq);
488 return err;
489}
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100490EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
Ben Collinsf98d2df2005-12-19 11:49:24 -0800491
492/* Send basic block requests */
493static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
494{
495 struct request *rq;
496 int err;
497
498 rq = blk_get_request(q, WRITE, __GFP_WAIT);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200499 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800500 rq->data = NULL;
501 rq->data_len = 0;
502 rq->timeout = BLK_DEFAULT_TIMEOUT;
503 memset(rq->cmd, 0, sizeof(rq->cmd));
504 rq->cmd[0] = cmd;
505 rq->cmd[4] = data;
506 rq->cmd_len = 6;
507 err = blk_execute_rq(q, bd_disk, rq, 0);
508 blk_put_request(rq);
509
510 return err;
511}
512
513static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
514{
515 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
516}
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
519{
520 request_queue_t *q;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800521 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 q = bd_disk->queue;
524 if (!q)
525 return -ENXIO;
526
527 if (blk_get_queue(q))
528 return -ENXIO;
529
530 switch (cmd) {
531 /*
532 * new sgv3 interface
533 */
534 case SG_GET_VERSION_NUM:
535 err = sg_get_version(arg);
536 break;
537 case SCSI_IOCTL_GET_IDLUN:
538 err = scsi_get_idlun(q, arg);
539 break;
540 case SCSI_IOCTL_GET_BUS_NUMBER:
541 err = scsi_get_bus(q, arg);
542 break;
543 case SG_SET_TIMEOUT:
544 err = sg_set_timeout(q, arg);
545 break;
546 case SG_GET_TIMEOUT:
547 err = sg_get_timeout(q);
548 break;
549 case SG_GET_RESERVED_SIZE:
550 err = sg_get_reserved_size(q, arg);
551 break;
552 case SG_SET_RESERVED_SIZE:
553 err = sg_set_reserved_size(q, arg);
554 break;
555 case SG_EMULATED_HOST:
556 err = sg_emulated_host(q, arg);
557 break;
558 case SG_IO: {
559 struct sg_io_hdr hdr;
560
561 err = -EFAULT;
562 if (copy_from_user(&hdr, arg, sizeof(hdr)))
563 break;
564 err = sg_io(file, q, bd_disk, &hdr);
565 if (err == -EFAULT)
566 break;
567
568 if (copy_to_user(arg, &hdr, sizeof(hdr)))
569 err = -EFAULT;
570 break;
571 }
572 case CDROM_SEND_PACKET: {
573 struct cdrom_generic_command cgc;
574 struct sg_io_hdr hdr;
575
576 err = -EFAULT;
577 if (copy_from_user(&cgc, arg, sizeof(cgc)))
578 break;
579 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
580 memset(&hdr, 0, sizeof(hdr));
581 hdr.interface_id = 'S';
582 hdr.cmd_len = sizeof(cgc.cmd);
583 hdr.dxfer_len = cgc.buflen;
584 err = 0;
585 switch (cgc.data_direction) {
586 case CGC_DATA_UNKNOWN:
587 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
588 break;
589 case CGC_DATA_WRITE:
590 hdr.dxfer_direction = SG_DXFER_TO_DEV;
591 break;
592 case CGC_DATA_READ:
593 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
594 break;
595 case CGC_DATA_NONE:
596 hdr.dxfer_direction = SG_DXFER_NONE;
597 break;
598 default:
599 err = -EINVAL;
600 }
601 if (err)
602 break;
603
604 hdr.dxferp = cgc.buffer;
605 hdr.sbp = cgc.sense;
606 if (hdr.sbp)
607 hdr.mx_sb_len = sizeof(struct request_sense);
608 hdr.timeout = cgc.timeout;
609 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
610 hdr.cmd_len = sizeof(cgc.cmd);
611
612 err = sg_io(file, q, bd_disk, &hdr);
613 if (err == -EFAULT)
614 break;
615
616 if (hdr.status)
617 err = -EIO;
618
619 cgc.stat = err;
620 cgc.buflen = hdr.resid;
621 if (copy_to_user(arg, &cgc, sizeof(cgc)))
622 err = -EFAULT;
623
624 break;
625 }
626
627 /*
628 * old junk scsi send command ioctl
629 */
630 case SCSI_IOCTL_SEND_COMMAND:
631 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
632 err = -EINVAL;
633 if (!arg)
634 break;
635
636 err = sg_scsi_ioctl(file, q, bd_disk, arg);
637 break;
638 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800639 err = blk_send_start_stop(q, bd_disk, 0x03);
640 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800642 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 break;
644 default:
645 err = -ENOTTY;
646 }
647
648 blk_put_queue(q);
649 return err;
650}
651
652EXPORT_SYMBOL(scsi_cmd_ioctl);