blob: c34272a348fe07fd22aec5c8d8ccc55c37cddf64 [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{
63 return q->sg_timeout / (HZ / USER_HZ);
64}
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)
71 q->sg_timeout = timeout * (HZ / USER_HZ);
72
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,
Adel Gadllah0b07de82008-06-26 13:48:27 +0200193 struct sg_io_hdr *hdr, struct file *file)
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;
FUJITA Tomonoriabf54392008-08-16 14:10:05 +0900197 if (blk_verify_command(&q->cmd_filter, rq->cmd,
198 file->f_mode & FMODE_WRITE))
Jens Axboe3d6392c2007-07-09 12:38:05 +0200199 return -EPERM;
200
201 /*
202 * fill in request structure
203 */
204 rq->cmd_len = hdr->cmd_len;
205 rq->cmd_type = REQ_TYPE_BLOCK_PC;
206
Tejun Heo24bb8fb2007-12-05 21:28:24 +0100207 rq->timeout = msecs_to_jiffies(hdr->timeout);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200208 if (!rq->timeout)
209 rq->timeout = q->sg_timeout;
210 if (!rq->timeout)
211 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
212
213 return 0;
214}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200215
216/*
217 * unmap a request that was previously mapped to this sg_io_hdr. handles
218 * both sg and non-sg sg_io_hdr.
219 */
FUJITA Tomonori41e17032007-07-22 10:06:50 +0900220static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
Jens Axboe3d6392c2007-07-09 12:38:05 +0200221{
FUJITA Tomonoriac6b91b2006-12-20 11:17:43 +0100222 blk_rq_unmap_user(rq->bio);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200223 blk_put_request(rq);
224 return 0;
225}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200226
FUJITA Tomonori41e17032007-07-22 10:06:50 +0900227static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
228 struct bio *bio)
Jens Axboe3d6392c2007-07-09 12:38:05 +0200229{
230 int r, ret = 0;
231
232 /*
233 * fill in all the output members
234 */
235 hdr->status = rq->errors & 0xff;
236 hdr->masked_status = status_byte(rq->errors);
237 hdr->msg_status = msg_byte(rq->errors);
238 hdr->host_status = host_byte(rq->errors);
239 hdr->driver_status = driver_byte(rq->errors);
240 hdr->info = 0;
241 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
242 hdr->info |= SG_INFO_CHECK;
FUJITA Tomonori7a85f882008-03-04 11:17:11 +0100243 hdr->resid = rq->data_len;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200244 hdr->sb_len_wr = 0;
245
246 if (rq->sense_len && hdr->sbp) {
247 int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
248
249 if (!copy_to_user(hdr->sbp, rq->sense, len))
250 hdr->sb_len_wr = len;
251 else
252 ret = -EFAULT;
253 }
254
255 rq->bio = bio;
256 r = blk_unmap_sghdr_rq(rq, hdr);
257 if (ret)
258 r = ret;
259
260 return r;
261}
Jens Axboe3d6392c2007-07-09 12:38:05 +0200262
Jens Axboe165125e2007-07-24 09:28:11 +0200263static int sg_io(struct file *file, struct request_queue *q,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct gendisk *bd_disk, struct sg_io_hdr *hdr)
265{
Jens Axboe3d6392c2007-07-09 12:38:05 +0200266 unsigned long start_time;
Adel Gadllah0b07de82008-06-26 13:48:27 +0200267 int writing = 0, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 char sense[SCSI_SENSE_BUFFERSIZE];
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100270 struct bio *bio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 if (hdr->interface_id != 'S')
273 return -EINVAL;
274 if (hdr->cmd_len > BLK_MAX_CDB)
275 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Mike Christiedefd94b2005-12-05 02:37:06 -0600277 if (hdr->dxfer_len > (q->max_hw_sectors << 9))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 return -EIO;
279
James Bottomley f1970ba2005-06-20 14:06:52 +0200280 if (hdr->dxfer_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 switch (hdr->dxfer_direction) {
282 default:
283 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 case SG_DXFER_TO_DEV:
285 writing = 1;
286 break;
Jens Axboe616e8a02006-11-13 18:04:59 +0100287 case SG_DXFER_TO_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 case SG_DXFER_FROM_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 break;
290 }
291
Jens Axboedd1cab92005-06-20 14:06:01 +0200292 rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
293 if (!rq)
294 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Adel Gadllah0b07de82008-06-26 13:48:27 +0200296 if (blk_fill_sghdr_rq(q, rq, hdr, file)) {
Jens Axboe3d6392c2007-07-09 12:38:05 +0200297 blk_put_request(rq);
298 return -EFAULT;
299 }
Mike Christie0e75f902006-12-01 10:40:55 +0100300
James Bottomley f1970ba2005-06-20 14:06:52 +0200301 if (hdr->iovec_count) {
302 const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
303 struct sg_iovec *iov;
304
305 iov = kmalloc(size, GFP_KERNEL);
306 if (!iov) {
307 ret = -ENOMEM;
Jens Axboedd1cab92005-06-20 14:06:01 +0200308 goto out;
James Bottomley f1970ba2005-06-20 14:06:52 +0200309 }
310
311 if (copy_from_user(iov, hdr->dxferp, size)) {
312 kfree(iov);
313 ret = -EFAULT;
314 goto out;
315 }
316
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900317 ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
FUJITA Tomonoria3bce902008-08-28 16:17:05 +0900318 hdr->dxfer_len, GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200319 kfree(iov);
320 } else if (hdr->dxfer_len)
FUJITA Tomonori152e2832008-08-28 16:17:06 +0900321 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
FUJITA Tomonoria3bce902008-08-28 16:17:05 +0900322 GFP_KERNEL);
James Bottomley f1970ba2005-06-20 14:06:52 +0200323
324 if (ret)
325 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
FUJITA Tomonori77d172c2006-12-11 10:01:34 +0100327 bio = rq->bio;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200328 memset(sense, 0, sizeof(sense));
329 rq->sense = sense;
330 rq->sense_len = 0;
Jens Axboe01840f92006-02-03 08:37:08 +0100331 rq->retries = 0;
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 start_time = jiffies;
334
335 /* ignore return value. All information is passed back to caller
336 * (if he doesn't check that is his problem).
337 * N.B. a non-zero SCSI status is _not_ necessarily an error.
338 */
James Bottomley 994ca9a2005-06-20 14:11:09 +0200339 blk_execute_rq(q, bd_disk, rq, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Tejun Heo24bb8fb2007-12-05 21:28:24 +0100341 hdr->duration = jiffies_to_msecs(jiffies - start_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Jens Axboe3d6392c2007-07-09 12:38:05 +0200343 return blk_complete_sghdr_rq(rq, hdr, bio);
Jens Axboedd1cab92005-06-20 14:06:01 +0200344out:
345 blk_put_request(rq);
346 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100349/**
350 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
351 * @file: file this ioctl operates on (optional)
352 * @q: request queue to send scsi commands down
353 * @disk: gendisk to operate on (option)
354 * @sic: userspace structure describing the command to perform
355 *
356 * Send down the scsi command described by @sic to the device below
357 * the request queue @q. If @file is non-NULL it's used to perform
358 * fine-grained permission checks that allow users to send down
359 * non-destructive SCSI commands. If the caller has a struct gendisk
360 * available it should be passed in as @disk to allow the low level
361 * driver to use the information contained in it. A non-NULL @disk
362 * is only allowed if the caller knows that the low level driver doesn't
363 * need it (e.g. in the scsi subsystem).
364 *
365 * Notes:
366 * - This interface is deprecated - users should use the SG_IO
367 * interface instead, as this is a more flexible approach to
368 * performing SCSI commands on a device.
369 * - The SCSI command length is determined by examining the 1st byte
370 * of the given command. There is no way to override this.
371 * - Data transfers are limited to PAGE_SIZE
372 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
373 * accommodate the sense buffer when an error occurs.
374 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
375 * old code will not be surprised.
376 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
377 * a negative return and the Unix error code in 'errno'.
378 * If the SCSI command succeeds then 0 is returned.
379 * Positive numbers returned are the compacted SCSI error codes (4
380 * bytes in one int) where the lowest byte is the SCSI status.
381 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382#define OMAX_SB_LEN 16 /* For backward compatibility */
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100383int sg_scsi_ioctl(struct file *file, struct request_queue *q,
384 struct gendisk *disk, struct scsi_ioctl_command __user *sic)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385{
386 struct request *rq;
FUJITA Tomonoriabf54392008-08-16 14:10:05 +0900387 int err, write_perm = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 unsigned int in_len, out_len, bytes, opcode, cmdlen;
389 char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
390
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100391 if (!sic)
392 return -EINVAL;
393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /*
395 * get in an out lengths, verify they don't exceed a page worth of data
396 */
397 if (get_user(in_len, &sic->inlen))
398 return -EFAULT;
399 if (get_user(out_len, &sic->outlen))
400 return -EFAULT;
401 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
402 return -EINVAL;
403 if (get_user(opcode, sic->data))
404 return -EFAULT;
405
406 bytes = max(in_len, out_len);
407 if (bytes) {
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700408 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (!buffer)
410 return -ENOMEM;
411
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
413
414 rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
415
416 cmdlen = COMMAND_SIZE(opcode);
417
418 /*
419 * get command and data to send to device, if any
420 */
421 err = -EFAULT;
422 rq->cmd_len = cmdlen;
423 if (copy_from_user(rq->cmd, sic->data, cmdlen))
424 goto error;
425
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100426 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 goto error;
428
FUJITA Tomonoriabf54392008-08-16 14:10:05 +0900429 /* scsi_ioctl passes NULL */
430 if (file && (file->f_mode & FMODE_WRITE))
431 write_perm = 1;
432
433 err = blk_verify_command(&q->cmd_filter, rq->cmd, write_perm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 if (err)
435 goto error;
436
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100437 /* default. possible overriden later */
438 rq->retries = 5;
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 switch (opcode) {
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100441 case SEND_DIAGNOSTIC:
442 case FORMAT_UNIT:
443 rq->timeout = FORMAT_UNIT_TIMEOUT;
444 rq->retries = 1;
445 break;
446 case START_STOP:
447 rq->timeout = START_STOP_TIMEOUT;
448 break;
449 case MOVE_MEDIUM:
450 rq->timeout = MOVE_MEDIUM_TIMEOUT;
451 break;
452 case READ_ELEMENT_STATUS:
453 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
454 break;
455 case READ_DEFECT_DATA:
456 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
457 rq->retries = 1;
458 break;
459 default:
Jens Axboe3d6392c2007-07-09 12:38:05 +0200460 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100461 break;
462 }
463
464 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) {
465 err = DRIVER_ERROR << 24;
466 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 }
468
469 memset(sense, 0, sizeof(sense));
470 rq->sense = sense;
471 rq->sense_len = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200472 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100474 blk_execute_rq(q, disk, rq, 0);
475
476out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 err = rq->errors & 0xff; /* only 8 bit SCSI status */
478 if (err) {
479 if (rq->sense_len && rq->sense) {
480 bytes = (OMAX_SB_LEN > rq->sense_len) ?
481 rq->sense_len : OMAX_SB_LEN;
482 if (copy_to_user(sic->data, rq->sense, bytes))
483 err = -EFAULT;
484 }
485 } else {
486 if (copy_to_user(sic->data, buffer, out_len))
487 err = -EFAULT;
488 }
489
490error:
491 kfree(buffer);
492 blk_put_request(rq);
493 return err;
494}
Christoph Hellwig21b2f0c2006-03-22 17:52:04 +0100495EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
Ben Collinsf98d2df2005-12-19 11:49:24 -0800496
497/* Send basic block requests */
Jens Axboe165125e2007-07-24 09:28:11 +0200498static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
499 int cmd, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800500{
501 struct request *rq;
502 int err;
503
504 rq = blk_get_request(q, WRITE, __GFP_WAIT);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200505 rq->cmd_type = REQ_TYPE_BLOCK_PC;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800506 rq->data = NULL;
507 rq->data_len = 0;
FUJITA Tomonori7a85f882008-03-04 11:17:11 +0100508 rq->extra_len = 0;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200509 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
Ben Collinsf98d2df2005-12-19 11:49:24 -0800510 rq->cmd[0] = cmd;
511 rq->cmd[4] = data;
512 rq->cmd_len = 6;
513 err = blk_execute_rq(q, bd_disk, rq, 0);
514 blk_put_request(rq);
515
516 return err;
517}
518
Jens Axboe165125e2007-07-24 09:28:11 +0200519static inline int blk_send_start_stop(struct request_queue *q,
520 struct gendisk *bd_disk, int data)
Ben Collinsf98d2df2005-12-19 11:49:24 -0800521{
522 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
523}
524
FUJITA Tomonori45e79a32007-07-09 12:39:20 +0200525int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
526 struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527{
Ben Collinsf98d2df2005-12-19 11:49:24 -0800528 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
FUJITA Tomonori45e79a32007-07-09 12:39:20 +0200530 if (!q || blk_get_queue(q))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 return -ENXIO;
532
533 switch (cmd) {
534 /*
535 * new sgv3 interface
536 */
537 case SG_GET_VERSION_NUM:
538 err = sg_get_version(arg);
539 break;
540 case SCSI_IOCTL_GET_IDLUN:
541 err = scsi_get_idlun(q, arg);
542 break;
543 case SCSI_IOCTL_GET_BUS_NUMBER:
544 err = scsi_get_bus(q, arg);
545 break;
546 case SG_SET_TIMEOUT:
547 err = sg_set_timeout(q, arg);
548 break;
549 case SG_GET_TIMEOUT:
550 err = sg_get_timeout(q);
551 break;
552 case SG_GET_RESERVED_SIZE:
553 err = sg_get_reserved_size(q, arg);
554 break;
555 case SG_SET_RESERVED_SIZE:
556 err = sg_set_reserved_size(q, arg);
557 break;
558 case SG_EMULATED_HOST:
559 err = sg_emulated_host(q, arg);
560 break;
561 case SG_IO: {
562 struct sg_io_hdr hdr;
563
564 err = -EFAULT;
565 if (copy_from_user(&hdr, arg, sizeof(hdr)))
566 break;
567 err = sg_io(file, q, bd_disk, &hdr);
568 if (err == -EFAULT)
569 break;
570
571 if (copy_to_user(arg, &hdr, sizeof(hdr)))
572 err = -EFAULT;
573 break;
574 }
575 case CDROM_SEND_PACKET: {
576 struct cdrom_generic_command cgc;
577 struct sg_io_hdr hdr;
578
579 err = -EFAULT;
580 if (copy_from_user(&cgc, arg, sizeof(cgc)))
581 break;
582 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
583 memset(&hdr, 0, sizeof(hdr));
584 hdr.interface_id = 'S';
585 hdr.cmd_len = sizeof(cgc.cmd);
586 hdr.dxfer_len = cgc.buflen;
587 err = 0;
588 switch (cgc.data_direction) {
589 case CGC_DATA_UNKNOWN:
590 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
591 break;
592 case CGC_DATA_WRITE:
593 hdr.dxfer_direction = SG_DXFER_TO_DEV;
594 break;
595 case CGC_DATA_READ:
596 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
597 break;
598 case CGC_DATA_NONE:
599 hdr.dxfer_direction = SG_DXFER_NONE;
600 break;
601 default:
602 err = -EINVAL;
603 }
604 if (err)
605 break;
606
607 hdr.dxferp = cgc.buffer;
608 hdr.sbp = cgc.sense;
609 if (hdr.sbp)
610 hdr.mx_sb_len = sizeof(struct request_sense);
Tim Wrightad337592008-07-27 17:50:38 -0700611 hdr.timeout = jiffies_to_msecs(cgc.timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
613 hdr.cmd_len = sizeof(cgc.cmd);
614
615 err = sg_io(file, q, bd_disk, &hdr);
616 if (err == -EFAULT)
617 break;
618
619 if (hdr.status)
620 err = -EIO;
621
622 cgc.stat = err;
623 cgc.buflen = hdr.resid;
624 if (copy_to_user(arg, &cgc, sizeof(cgc)))
625 err = -EFAULT;
626
627 break;
628 }
629
630 /*
631 * old junk scsi send command ioctl
632 */
633 case SCSI_IOCTL_SEND_COMMAND:
634 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
635 err = -EINVAL;
636 if (!arg)
637 break;
638
639 err = sg_scsi_ioctl(file, q, bd_disk, arg);
640 break;
641 case CDROMCLOSETRAY:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800642 err = blk_send_start_stop(q, bd_disk, 0x03);
643 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 case CDROMEJECT:
Ben Collinsf98d2df2005-12-19 11:49:24 -0800645 err = blk_send_start_stop(q, bd_disk, 0x02);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 break;
647 default:
648 err = -ENOTTY;
649 }
650
651 blk_put_queue(q);
652 return err;
653}
654
655EXPORT_SYMBOL(scsi_cmd_ioctl);