blob: a9670dd4b5de034cf2130f2fa0f552eda1bd80c5 [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{
FUJITA Tomonori91e463c2009-04-13 20:03:10 +0200220 int r, 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;
Tejun Heoc3a4d782009-05-07 22:24:37 +0900233 hdr->resid = rq->resid_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
FUJITA Tomonori91e463c2009-04-13 20:03:10 +0200245 r = blk_rq_unmap_user(bio);
246 if (!ret)
247 ret = r;
Boaz Harrosh1cd96c22009-03-24 12:35:07 +0100248 blk_put_request(rq);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200249
Boaz Harrosh1cd96c22009-03-24 12:35:07 +0100250 return ret;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200251}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200252
Al Viro5842e512008-09-02 16:35:55 -0400253static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
254 struct sg_io_hdr *hdr, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
Jens Axboe3d6392c2007-07-09 12:38:05 +0200256 unsigned long start_time;
Adel Gadllah0b07de82008-06-26 13:48:27 +0200257 int writing = 0, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 char sense[SCSI_SENSE_BUFFERSIZE];
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100260 struct bio *bio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 if (hdr->interface_id != 'S')
263 return -EINVAL;
264 if (hdr->cmd_len > BLK_MAX_CDB)
265 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Mike Christiedefd94b2005-12-05 02:37:06 -0600267 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return -EIO;
269
James Bottomley f1970ba2005-06-20 14:06:52 +0200270 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 switch (hdr->dxfer_direction) {
272 default:
273 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 case SG_DXFER_TO_DEV:
275 writing = 1;
276 break;
Jens Axboe616e8a02006-11-13 18:04:59 +0100277 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 break;
280 }
281
Jens Axboedd1cab92005-06-20 14:06:01 +0200282 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
283 if (!rq)
284 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Al Viro5842e512008-09-02 16:35:55 -0400286 if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
Jens Axboe3d6392c2007-07-09 12:38:05 +0200287 blk_put_request(rq);
288 return -EFAULT;
289 }
Mike Christie0e75f902006-12-01 10:40:55 +0100290
James Bottomley f1970ba2005-06-20 14:06:52 +0200291 if (hdr->iovec_count) {
292 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
Tejun Heo25636e22009-04-15 22:10:24 +0900293 size_t iov_data_len;
James Bottomley f1970ba2005-06-20 14:06:52 +0200294 struct sg_iovec *iov;
295
296 iov = kmalloc(size, GFP_KERNEL);
297 if (!iov) {
298 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200299 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200300 }
301
302 if (copy_from_user(iov, hdr->dxferp, size)) {
303 kfree(iov);
304 ret = -EFAULT;
305 goto out;
306 }
307
Tejun Heo25636e22009-04-15 22:10:24 +0900308 /* SG_IO howto says that the shorter of the two wins */
309 iov_data_len = iov_length((struct iovec *)iov,
310 hdr->iovec_count);
311 if (hdr->dxfer_len < iov_data_len) {
312 hdr->iovec_count = iov_shorten((struct iovec *)iov,
313 hdr->iovec_count,
314 hdr->dxfer_len);
315 iov_data_len = hdr->dxfer_len;
316 }
317
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900318 ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
Tejun Heo25636e22009-04-15 22:10:24 +0900319 iov_data_len, GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200320 kfree(iov);
321 } else if (hdr->dxfer_len)
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900322 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
FUJITA Tomonoria3bce902008-08-28 16:17:05 +0900323 GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200324
325 if (ret)
326 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100328 bio = rq->bio;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200329 memset(sense, 0, sizeof(sense));
330 rq->sense = sense;
331 rq->sense_len = 0;
Jens Axboe01840f92006-02-03 08:37:08 +0100332 rq->retries = 0;
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 start_time = jiffies;
335
336 /* ignore return value. All information is passed back to caller
337 * (if he doesn't check that is his problem).
338 * N.B. a non-zero SCSI status is _not_ necessarily an error.
339 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200340 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Tejun Heo24bb8fb2007-12-05 21:28:24 +0100342 hdr->duration = jiffies_to_msecs(jiffies - start_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Jens Axboe3d6392c2007-07-09 12:38:05 +0200344 return blk_complete_sghdr_rq(rq, hdr, bio);
Jens Axboedd1cab92005-06-20 14:06:01 +0200345out:
346 blk_put_request(rq);
347 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100350/**
351 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
352 * @file: file this ioctl operates on (optional)
353 * @q: request queue to send scsi commands down
354 * @disk: gendisk to operate on (option)
355 * @sic: userspace structure describing the command to perform
356 *
357 * Send down the scsi command described by @sic to the device below
358 * the request queue @q. If @file is non-NULL it's used to perform
359 * fine-grained permission checks that allow users to send down
360 * non-destructive SCSI commands. If the caller has a struct gendisk
361 * available it should be passed in as @disk to allow the low level
362 * driver to use the information contained in it. A non-NULL @disk
363 * is only allowed if the caller knows that the low level driver doesn't
364 * need it (e.g. in the scsi subsystem).
365 *
366 * Notes:
367 * - This interface is deprecated - users should use the SG_IO
368 * interface instead, as this is a more flexible approach to
369 * performing SCSI commands on a device.
370 * - The SCSI command length is determined by examining the 1st byte
371 * of the given command. There is no way to override this.
372 * - Data transfers are limited to PAGE_SIZE
373 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
374 * accommodate the sense buffer when an error occurs.
375 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
376 * old code will not be surprised.
377 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
378 * a negative return and the Unix error code in 'errno'.
379 * If the SCSI command succeeds then 0 is returned.
380 * Positive numbers returned are the compacted SCSI error codes (4
381 * bytes in one int) where the lowest byte is the SCSI status.
382 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383#define OMAX_SB_LEN 16 /* For backward compatibility */
Al Viroe915e872008-09-02 17:16:41 -0400384int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
385 struct scsi_ioctl_command __user *sic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
387 struct request *rq;
Al Viroaeb5d722008-09-02 15:28:45 -0400388 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 unsigned int in_len, out_len, bytes, opcode, cmdlen;
390 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
391
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100392 if (!sic)
393 return -EINVAL;
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 /*
396 * get in an out lengths, verify they don't exceed a page worth of data
397 */
398 if (get_user(in_len, &sic->inlen))
399 return -EFAULT;
400 if (get_user(out_len, &sic->outlen))
401 return -EFAULT;
402 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
403 return -EINVAL;
404 if (get_user(opcode, sic->data))
405 return -EFAULT;
406
407 bytes = max(in_len, out_len);
408 if (bytes) {
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700409 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (!buffer)
411 return -ENOMEM;
412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 }
414
415 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
416
417 cmdlen = COMMAND_SIZE(opcode);
418
419 /*
420 * get command and data to send to device, if any
421 */
422 err = -EFAULT;
423 rq->cmd_len = cmdlen;
424 if (copy_from_user(rq->cmd, sic->data, cmdlen))
425 goto error;
426
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100427 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 goto error;
429
Al Viroe915e872008-09-02 17:16:41 -0400430 err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 if (err)
432 goto error;
433
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100434 /* default. possible overriden later */
435 rq->retries = 5;
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 switch (opcode) {
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100438 case SEND_DIAGNOSTIC:
439 case FORMAT_UNIT:
440 rq->timeout = FORMAT_UNIT_TIMEOUT;
441 rq->retries = 1;
442 break;
443 case START_STOP:
444 rq->timeout = START_STOP_TIMEOUT;
445 break;
446 case MOVE_MEDIUM:
447 rq->timeout = MOVE_MEDIUM_TIMEOUT;
448 break;
449 case READ_ELEMENT_STATUS:
450 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
451 break;
452 case READ_DEFECT_DATA:
453 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
454 rq->retries = 1;
455 break;
456 default:
Jens Axboe3d6392c2007-07-09 12:38:05 +0200457 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100458 break;
459 }
460
461 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
462 err = DRIVER_ERROR << 24;
463 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 }
465
466 memset(sense, 0, sizeof(sense));
467 rq->sense = sense;
468 rq->sense_len = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200469 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100471 blk_execute_rq(q, disk, rq, 0);
472
473out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 err = rq->errors & 0xff; /* only 8 bit SCSI status */
475 if (err) {
476 if (rq->sense_len && rq->sense) {
477 bytes = (OMAX_SB_LEN > rq->sense_len) ?
478 rq->sense_len : OMAX_SB_LEN;
479 if (copy_to_user(sic->data, rq->sense, bytes))
480 err = -EFAULT;
481 }
482 } else {
483 if (copy_to_user(sic->data, buffer, out_len))
484 err = -EFAULT;
485 }
486
487error:
488 kfree(buffer);
489 blk_put_request(rq);
490 return err;
491}
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100492EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
Ben Collinsf98d2df2005-12-19 11:49:24 -0800493
494/* Send basic block requests */
Jens Axboe165125e2007-07-24 09:28:11 +0200495static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
496 int cmd, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800497{
498 struct request *rq;
499 int err;
500
501 rq = blk_get_request(q, WRITE, __GFP_WAIT);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200502 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200503 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800504 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
Jens Axboe165125e2007-07-24 09:28:11 +0200513static inline int blk_send_start_stop(struct request_queue *q,
514 struct gendisk *bd_disk, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800515{
516 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
517}
518
Al Viro74f3c8a2007-08-27 15:38:10 -0400519int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
520 unsigned int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521{
Ben Collinsf98d2df2005-12-19 11:49:24 -0800522 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
FUJITA Tomonori45e79a32007-07-09 12:39:20 +0200524 if (!q || blk_get_queue(q))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return -ENXIO;
526
527 switch (cmd) {
528 /*
529 * new sgv3 interface
530 */
531 case SG_GET_VERSION_NUM:
532 err = sg_get_version(arg);
533 break;
534 case SCSI_IOCTL_GET_IDLUN:
535 err = scsi_get_idlun(q, arg);
536 break;
537 case SCSI_IOCTL_GET_BUS_NUMBER:
538 err = scsi_get_bus(q, arg);
539 break;
540 case SG_SET_TIMEOUT:
541 err = sg_set_timeout(q, arg);
542 break;
543 case SG_GET_TIMEOUT:
544 err = sg_get_timeout(q);
545 break;
546 case SG_GET_RESERVED_SIZE:
547 err = sg_get_reserved_size(q, arg);
548 break;
549 case SG_SET_RESERVED_SIZE:
550 err = sg_set_reserved_size(q, arg);
551 break;
552 case SG_EMULATED_HOST:
553 err = sg_emulated_host(q, arg);
554 break;
555 case SG_IO: {
556 struct sg_io_hdr hdr;
557
558 err = -EFAULT;
559 if (copy_from_user(&hdr, arg, sizeof(hdr)))
560 break;
Al Viro74f3c8a2007-08-27 15:38:10 -0400561 err = sg_io(q, bd_disk, &hdr, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 if (err == -EFAULT)
563 break;
564
565 if (copy_to_user(arg, &hdr, sizeof(hdr)))
566 err = -EFAULT;
567 break;
568 }
569 case CDROM_SEND_PACKET: {
570 struct cdrom_generic_command cgc;
571 struct sg_io_hdr hdr;
572
573 err = -EFAULT;
574 if (copy_from_user(&cgc, arg, sizeof(cgc)))
575 break;
576 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
577 memset(&hdr, 0, sizeof(hdr));
578 hdr.interface_id = 'S';
579 hdr.cmd_len = sizeof(cgc.cmd);
580 hdr.dxfer_len = cgc.buflen;
581 err = 0;
582 switch (cgc.data_direction) {
583 case CGC_DATA_UNKNOWN:
584 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
585 break;
586 case CGC_DATA_WRITE:
587 hdr.dxfer_direction = SG_DXFER_TO_DEV;
588 break;
589 case CGC_DATA_READ:
590 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
591 break;
592 case CGC_DATA_NONE:
593 hdr.dxfer_direction = SG_DXFER_NONE;
594 break;
595 default:
596 err = -EINVAL;
597 }
598 if (err)
599 break;
600
601 hdr.dxferp = cgc.buffer;
602 hdr.sbp = cgc.sense;
603 if (hdr.sbp)
604 hdr.mx_sb_len = sizeof(struct request_sense);
Tim Wrightad337592008-07-27 17:50:38 -0700605 hdr.timeout = jiffies_to_msecs(cgc.timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
607 hdr.cmd_len = sizeof(cgc.cmd);
608
Al Viro74f3c8a2007-08-27 15:38:10 -0400609 err = sg_io(q, bd_disk, &hdr, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 if (err == -EFAULT)
611 break;
612
613 if (hdr.status)
614 err = -EIO;
615
616 cgc.stat = err;
617 cgc.buflen = hdr.resid;
618 if (copy_to_user(arg, &cgc, sizeof(cgc)))
619 err = -EFAULT;
620
621 break;
622 }
623
624 /*
625 * old junk scsi send command ioctl
626 */
627 case SCSI_IOCTL_SEND_COMMAND:
628 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
629 err = -EINVAL;
630 if (!arg)
631 break;
632
Al Viro74f3c8a2007-08-27 15:38:10 -0400633 err = sg_scsi_ioctl(q, bd_disk, mode, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 break;
635 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800636 err = blk_send_start_stop(q, bd_disk, 0x03);
637 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800639 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 break;
641 default:
642 err = -ENOTTY;
643 }
644
645 blk_put_queue(q);
646 return err;
647}
648
649EXPORT_SYMBOL(scsi_cmd_ioctl);