blob: 626ee274c5c4fd7d9d989528ff897f3080f81fb1 [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. */
Boaz Harroshdb4742d2008-04-30 11:27:26 +030036const unsigned char scsi_command_size_tbl[8] =
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
38 6, 10, 10, 12,
39 16, 12, 10, 10
40};
Boaz Harroshdb4742d2008-04-30 11:27:26 +030041EXPORT_SYMBOL(scsi_command_size_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <scsi/sg.h>
44
45static int sg_get_version(int __user *p)
46{
Arjan van de Ven64100092006-01-06 09:46:02 +010047 static const int sg_version_num = 30527;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 return put_user(sg_version_num, p);
49}
50
Jens Axboe165125e2007-07-24 09:28:11 +020051static int scsi_get_idlun(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
53 return put_user(0, p);
54}
55
Jens Axboe165125e2007-07-24 09:28:11 +020056static int scsi_get_bus(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
58 return put_user(0, p);
59}
60
Jens Axboe165125e2007-07-24 09:28:11 +020061static int sg_get_timeout(struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
Milton Miller2b91baf2008-11-17 13:10:34 +010063 return jiffies_to_clock_t(q->sg_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
Jens Axboe165125e2007-07-24 09:28:11 +020066static int sg_set_timeout(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{
68 int timeout, err = get_user(timeout, p);
69
70 if (!err)
Milton Miller2b91baf2008-11-17 13:10:34 +010071 q->sg_timeout = clock_t_to_jiffies(timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 return err;
74}
75
Jens Axboe165125e2007-07-24 09:28:11 +020076static int sg_get_reserved_size(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
Alan Stern44ec9542007-02-20 11:01:57 -050078 unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
79
80 return put_user(val, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}
82
Jens Axboe165125e2007-07-24 09:28:11 +020083static int sg_set_reserved_size(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
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 */
Jens Axboe165125e2007-07-24 09:28:11 +0200103static int sg_emulated_host(struct request_queue *q, int __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
105 return put_user(1, p);
106}
107
FUJITA Tomonori4beab5c2008-07-26 18:03:25 +0900108void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
FUJITA Tomonoriabf54392008-08-16 14:10:05 +0900109{
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);
xiphmont@xiph.org35e396c2008-08-22 11:12:21 +0200188 __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
FUJITA Tomonoriabf54392008-08-16 14:10:05 +0900189}
190EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults);
191
Jens Axboe165125e2007-07-24 09:28:11 +0200192static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
Al Viro5842e512008-09-02 16:35:55 -0400193 struct sg_io_hdr *hdr, fmode_t mode)
Jens Axboe3d6392c2007-07-09 12:38:05 +0200194{
Jens Axboe3d6392c2007-07-09 12:38:05 +0200195 if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
196 return -EFAULT;
Al Viro5842e512008-09-02 16:35:55 -0400197 if (blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE))
Jens Axboe3d6392c2007-07-09 12:38:05 +0200198 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
Tejun Heo24bb8fb2007-12-05 21:28:24 +0100206 rq->timeout = msecs_to_jiffies(hdr->timeout);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200207 if (!rq->timeout)
208 rq->timeout = q->sg_timeout;
209 if (!rq->timeout)
210 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Linus Torvaldsf2f1fa72008-12-05 14:49:18 -0800211 if (rq->timeout < BLK_MIN_SG_TIMEOUT)
212 rq->timeout = BLK_MIN_SG_TIMEOUT;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200213
214 return 0;
215}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200216
FUJITA Tomonori41e17032007-07-22 10:06:50 +0900217static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
218 struct bio *bio)
Jens Axboe3d6392c2007-07-09 12:38:05 +0200219{
Boaz Harrosh1cd96c22009-03-24 12:35:07 +0100220 int ret = 0;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200221
222 /*
223 * fill in all the output members
224 */
225 hdr->status = rq->errors & 0xff;
226 hdr->masked_status = status_byte(rq->errors);
227 hdr->msg_status = msg_byte(rq->errors);
228 hdr->host_status = host_byte(rq->errors);
229 hdr->driver_status = driver_byte(rq->errors);
230 hdr->info = 0;
231 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
232 hdr->info |= SG_INFO_CHECK;
FUJITA Tomonori7a85f882008-03-04 11:17:11 +0100233 hdr->resid = rq->data_len;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200234 hdr->sb_len_wr = 0;
235
236 if (rq->sense_len && hdr->sbp) {
237 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
238
239 if (!copy_to_user(hdr->sbp, rq->sense, len))
240 hdr->sb_len_wr = len;
241 else
242 ret = -EFAULT;
243 }
244
Boaz Harrosh1cd96c22009-03-24 12:35:07 +0100245 blk_rq_unmap_user(bio);
246 blk_put_request(rq);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200247
Boaz Harrosh1cd96c22009-03-24 12:35:07 +0100248 return ret;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200249}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200250
Al Viro5842e512008-09-02 16:35:55 -0400251static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
252 struct sg_io_hdr *hdr, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
Jens Axboe3d6392c2007-07-09 12:38:05 +0200254 unsigned long start_time;
Adel Gadllah0b07de82008-06-26 13:48:27 +0200255 int writing = 0, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 char sense[SCSI_SENSE_BUFFERSIZE];
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100258 struct bio *bio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 if (hdr->interface_id != 'S')
261 return -EINVAL;
262 if (hdr->cmd_len > BLK_MAX_CDB)
263 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Mike Christiedefd94b2005-12-05 02:37:06 -0600265 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return -EIO;
267
James Bottomley f1970ba2005-06-20 14:06:52 +0200268 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 switch (hdr->dxfer_direction) {
270 default:
271 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 case SG_DXFER_TO_DEV:
273 writing = 1;
274 break;
Jens Axboe616e8a02006-11-13 18:04:59 +0100275 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 break;
278 }
279
Jens Axboedd1cab92005-06-20 14:06:01 +0200280 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
281 if (!rq)
282 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Al Viro5842e512008-09-02 16:35:55 -0400284 if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
Jens Axboe3d6392c2007-07-09 12:38:05 +0200285 blk_put_request(rq);
286 return -EFAULT;
287 }
Mike Christie0e75f902006-12-01 10:40:55 +0100288
James Bottomley f1970ba2005-06-20 14:06:52 +0200289 if (hdr->iovec_count) {
290 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
291 struct sg_iovec *iov;
292
293 iov = kmalloc(size, GFP_KERNEL);
294 if (!iov) {
295 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200296 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200297 }
298
299 if (copy_from_user(iov, hdr->dxferp, size)) {
300 kfree(iov);
301 ret = -EFAULT;
302 goto out;
303 }
304
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900305 ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
FUJITA Tomonoria3bce902008-08-28 16:17:05 +0900306 hdr->dxfer_len, GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200307 kfree(iov);
308 } else if (hdr->dxfer_len)
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900309 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
FUJITA Tomonoria3bce902008-08-28 16:17:05 +0900310 GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200311
312 if (ret)
313 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100315 bio = rq->bio;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200316 memset(sense, 0, sizeof(sense));
317 rq->sense = sense;
318 rq->sense_len = 0;
Jens Axboe01840f92006-02-03 08:37:08 +0100319 rq->retries = 0;
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 start_time = jiffies;
322
323 /* ignore return value. All information is passed back to caller
324 * (if he doesn't check that is his problem).
325 * N.B. a non-zero SCSI status is _not_ necessarily an error.
326 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200327 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Tejun Heo24bb8fb2007-12-05 21:28:24 +0100329 hdr->duration = jiffies_to_msecs(jiffies - start_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Jens Axboe3d6392c2007-07-09 12:38:05 +0200331 return blk_complete_sghdr_rq(rq, hdr, bio);
Jens Axboedd1cab92005-06-20 14:06:01 +0200332out:
333 blk_put_request(rq);
334 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335}
336
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100337/**
338 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
339 * @file: file this ioctl operates on (optional)
340 * @q: request queue to send scsi commands down
341 * @disk: gendisk to operate on (option)
342 * @sic: userspace structure describing the command to perform
343 *
344 * Send down the scsi command described by @sic to the device below
345 * the request queue @q. If @file is non-NULL it's used to perform
346 * fine-grained permission checks that allow users to send down
347 * non-destructive SCSI commands. If the caller has a struct gendisk
348 * available it should be passed in as @disk to allow the low level
349 * driver to use the information contained in it. A non-NULL @disk
350 * is only allowed if the caller knows that the low level driver doesn't
351 * need it (e.g. in the scsi subsystem).
352 *
353 * Notes:
354 * - This interface is deprecated - users should use the SG_IO
355 * interface instead, as this is a more flexible approach to
356 * performing SCSI commands on a device.
357 * - The SCSI command length is determined by examining the 1st byte
358 * of the given command. There is no way to override this.
359 * - Data transfers are limited to PAGE_SIZE
360 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
361 * accommodate the sense buffer when an error occurs.
362 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
363 * old code will not be surprised.
364 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
365 * a negative return and the Unix error code in 'errno'.
366 * If the SCSI command succeeds then 0 is returned.
367 * Positive numbers returned are the compacted SCSI error codes (4
368 * bytes in one int) where the lowest byte is the SCSI status.
369 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370#define OMAX_SB_LEN 16 /* For backward compatibility */
Al Viroe915e872008-09-02 17:16:41 -0400371int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
372 struct scsi_ioctl_command __user *sic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
374 struct request *rq;
Al Viroaeb5d722008-09-02 15:28:45 -0400375 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 unsigned int in_len, out_len, bytes, opcode, cmdlen;
377 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
378
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100379 if (!sic)
380 return -EINVAL;
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 /*
383 * get in an out lengths, verify they don't exceed a page worth of data
384 */
385 if (get_user(in_len, &sic->inlen))
386 return -EFAULT;
387 if (get_user(out_len, &sic->outlen))
388 return -EFAULT;
389 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
390 return -EINVAL;
391 if (get_user(opcode, sic->data))
392 return -EFAULT;
393
394 bytes = max(in_len, out_len);
395 if (bytes) {
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700396 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 if (!buffer)
398 return -ENOMEM;
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 }
401
402 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
403
404 cmdlen = COMMAND_SIZE(opcode);
405
406 /*
407 * get command and data to send to device, if any
408 */
409 err = -EFAULT;
410 rq->cmd_len = cmdlen;
411 if (copy_from_user(rq->cmd, sic->data, cmdlen))
412 goto error;
413
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100414 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 goto error;
416
Al Viroe915e872008-09-02 17:16:41 -0400417 err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 if (err)
419 goto error;
420
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100421 /* default. possible overriden later */
422 rq->retries = 5;
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 switch (opcode) {
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100425 case SEND_DIAGNOSTIC:
426 case FORMAT_UNIT:
427 rq->timeout = FORMAT_UNIT_TIMEOUT;
428 rq->retries = 1;
429 break;
430 case START_STOP:
431 rq->timeout = START_STOP_TIMEOUT;
432 break;
433 case MOVE_MEDIUM:
434 rq->timeout = MOVE_MEDIUM_TIMEOUT;
435 break;
436 case READ_ELEMENT_STATUS:
437 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
438 break;
439 case READ_DEFECT_DATA:
440 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
441 rq->retries = 1;
442 break;
443 default:
Jens Axboe3d6392c2007-07-09 12:38:05 +0200444 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100445 break;
446 }
447
448 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
449 err = DRIVER_ERROR << 24;
450 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 }
452
453 memset(sense, 0, sizeof(sense));
454 rq->sense = sense;
455 rq->sense_len = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200456 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100458 blk_execute_rq(q, disk, rq, 0);
459
460out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 err = rq->errors & 0xff; /* only 8 bit SCSI status */
462 if (err) {
463 if (rq->sense_len && rq->sense) {
464 bytes = (OMAX_SB_LEN > rq->sense_len) ?
465 rq->sense_len : OMAX_SB_LEN;
466 if (copy_to_user(sic->data, rq->sense, bytes))
467 err = -EFAULT;
468 }
469 } else {
470 if (copy_to_user(sic->data, buffer, out_len))
471 err = -EFAULT;
472 }
473
474error:
475 kfree(buffer);
476 blk_put_request(rq);
477 return err;
478}
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100479EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
Ben Collinsf98d2df2005-12-19 11:49:24 -0800480
481/* Send basic block requests */
Jens Axboe165125e2007-07-24 09:28:11 +0200482static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
483 int cmd, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800484{
485 struct request *rq;
486 int err;
487
488 rq = blk_get_request(q, WRITE, __GFP_WAIT);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200489 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800490 rq->data = NULL;
491 rq->data_len = 0;
FUJITA Tomonori7a85f882008-03-04 11:17:11 +0100492 rq->extra_len = 0;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200493 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800494 rq->cmd[0] = cmd;
495 rq->cmd[4] = data;
496 rq->cmd_len = 6;
497 err = blk_execute_rq(q, bd_disk, rq, 0);
498 blk_put_request(rq);
499
500 return err;
501}
502
Jens Axboe165125e2007-07-24 09:28:11 +0200503static inline int blk_send_start_stop(struct request_queue *q,
504 struct gendisk *bd_disk, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800505{
506 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
507}
508
Al Viro74f3c8a2007-08-27 15:38:10 -0400509int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
510 unsigned int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511{
Ben Collinsf98d2df2005-12-19 11:49:24 -0800512 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
FUJITA Tomonori45e79a32007-07-09 12:39:20 +0200514 if (!q || blk_get_queue(q))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return -ENXIO;
516
517 switch (cmd) {
518 /*
519 * new sgv3 interface
520 */
521 case SG_GET_VERSION_NUM:
522 err = sg_get_version(arg);
523 break;
524 case SCSI_IOCTL_GET_IDLUN:
525 err = scsi_get_idlun(q, arg);
526 break;
527 case SCSI_IOCTL_GET_BUS_NUMBER:
528 err = scsi_get_bus(q, arg);
529 break;
530 case SG_SET_TIMEOUT:
531 err = sg_set_timeout(q, arg);
532 break;
533 case SG_GET_TIMEOUT:
534 err = sg_get_timeout(q);
535 break;
536 case SG_GET_RESERVED_SIZE:
537 err = sg_get_reserved_size(q, arg);
538 break;
539 case SG_SET_RESERVED_SIZE:
540 err = sg_set_reserved_size(q, arg);
541 break;
542 case SG_EMULATED_HOST:
543 err = sg_emulated_host(q, arg);
544 break;
545 case SG_IO: {
546 struct sg_io_hdr hdr;
547
548 err = -EFAULT;
549 if (copy_from_user(&hdr, arg, sizeof(hdr)))
550 break;
Al Viro74f3c8a2007-08-27 15:38:10 -0400551 err = sg_io(q, bd_disk, &hdr, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 if (err == -EFAULT)
553 break;
554
555 if (copy_to_user(arg, &hdr, sizeof(hdr)))
556 err = -EFAULT;
557 break;
558 }
559 case CDROM_SEND_PACKET: {
560 struct cdrom_generic_command cgc;
561 struct sg_io_hdr hdr;
562
563 err = -EFAULT;
564 if (copy_from_user(&cgc, arg, sizeof(cgc)))
565 break;
566 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
567 memset(&hdr, 0, sizeof(hdr));
568 hdr.interface_id = 'S';
569 hdr.cmd_len = sizeof(cgc.cmd);
570 hdr.dxfer_len = cgc.buflen;
571 err = 0;
572 switch (cgc.data_direction) {
573 case CGC_DATA_UNKNOWN:
574 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
575 break;
576 case CGC_DATA_WRITE:
577 hdr.dxfer_direction = SG_DXFER_TO_DEV;
578 break;
579 case CGC_DATA_READ:
580 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
581 break;
582 case CGC_DATA_NONE:
583 hdr.dxfer_direction = SG_DXFER_NONE;
584 break;
585 default:
586 err = -EINVAL;
587 }
588 if (err)
589 break;
590
591 hdr.dxferp = cgc.buffer;
592 hdr.sbp = cgc.sense;
593 if (hdr.sbp)
594 hdr.mx_sb_len = sizeof(struct request_sense);
Tim Wrightad337592008-07-27 17:50:38 -0700595 hdr.timeout = jiffies_to_msecs(cgc.timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
597 hdr.cmd_len = sizeof(cgc.cmd);
598
Al Viro74f3c8a2007-08-27 15:38:10 -0400599 err = sg_io(q, bd_disk, &hdr, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 if (err == -EFAULT)
601 break;
602
603 if (hdr.status)
604 err = -EIO;
605
606 cgc.stat = err;
607 cgc.buflen = hdr.resid;
608 if (copy_to_user(arg, &cgc, sizeof(cgc)))
609 err = -EFAULT;
610
611 break;
612 }
613
614 /*
615 * old junk scsi send command ioctl
616 */
617 case SCSI_IOCTL_SEND_COMMAND:
618 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
619 err = -EINVAL;
620 if (!arg)
621 break;
622
Al Viro74f3c8a2007-08-27 15:38:10 -0400623 err = sg_scsi_ioctl(q, bd_disk, mode, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 break;
625 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800626 err = blk_send_start_stop(q, bd_disk, 0x03);
627 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800629 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 break;
631 default:
632 err = -ENOTTY;
633 }
634
635 blk_put_queue(q);
636 return err;
637}
638
639EXPORT_SYMBOL(scsi_cmd_ioctl);