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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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> | |
c59ede7b | 24 | #include <linux/capability.h> |
1da177e4 LT |
25 | #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. */ | |
db4742dd | 36 | const unsigned char scsi_command_size_tbl[8] = |
1da177e4 LT |
37 | { |
38 | 6, 10, 10, 12, | |
39 | 16, 12, 10, 10 | |
40 | }; | |
db4742dd | 41 | EXPORT_SYMBOL(scsi_command_size_tbl); |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <scsi/sg.h> |
44 | ||
45 | static int sg_get_version(int __user *p) | |
46 | { | |
64100099 | 47 | static const int sg_version_num = 30527; |
1da177e4 LT |
48 | return put_user(sg_version_num, p); |
49 | } | |
50 | ||
165125e1 | 51 | static int scsi_get_idlun(struct request_queue *q, int __user *p) |
1da177e4 LT |
52 | { |
53 | return put_user(0, p); | |
54 | } | |
55 | ||
165125e1 | 56 | static int scsi_get_bus(struct request_queue *q, int __user *p) |
1da177e4 LT |
57 | { |
58 | return put_user(0, p); | |
59 | } | |
60 | ||
165125e1 | 61 | static int sg_get_timeout(struct request_queue *q) |
1da177e4 LT |
62 | { |
63 | return q->sg_timeout / (HZ / USER_HZ); | |
64 | } | |
65 | ||
165125e1 | 66 | static int sg_set_timeout(struct request_queue *q, int __user *p) |
1da177e4 LT |
67 | { |
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 | ||
165125e1 | 76 | static int sg_get_reserved_size(struct request_queue *q, int __user *p) |
1da177e4 | 77 | { |
44ec9542 AS |
78 | unsigned val = min(q->sg_reserved_size, q->max_sectors << 9); |
79 | ||
80 | return put_user(val, p); | |
1da177e4 LT |
81 | } |
82 | ||
165125e1 | 83 | static int sg_set_reserved_size(struct request_queue *q, int __user *p) |
1da177e4 LT |
84 | { |
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 | */ | |
165125e1 | 103 | static int sg_emulated_host(struct request_queue *q, int __user *p) |
1da177e4 LT |
104 | { |
105 | return put_user(1, p); | |
106 | } | |
107 | ||
4beab5c6 | 108 | void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) |
abf54393 FT |
109 | { |
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); | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults); | |
190 | ||
165125e1 | 191 | static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq, |
0b07de85 | 192 | struct sg_io_hdr *hdr, struct file *file) |
3d6392cf | 193 | { |
3d6392cf JA |
194 | if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len)) |
195 | return -EFAULT; | |
abf54393 FT |
196 | if (blk_verify_command(&q->cmd_filter, rq->cmd, |
197 | file->f_mode & FMODE_WRITE)) | |
3d6392cf JA |
198 | 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 | ||
24bb8fb9 | 206 | rq->timeout = msecs_to_jiffies(hdr->timeout); |
3d6392cf JA |
207 | if (!rq->timeout) |
208 | rq->timeout = q->sg_timeout; | |
209 | if (!rq->timeout) | |
210 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; | |
211 | ||
212 | return 0; | |
213 | } | |
3d6392cf JA |
214 | |
215 | /* | |
216 | * unmap a request that was previously mapped to this sg_io_hdr. handles | |
217 | * both sg and non-sg sg_io_hdr. | |
218 | */ | |
41e1703b | 219 | static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr) |
3d6392cf | 220 | { |
ac6b91b8 | 221 | blk_rq_unmap_user(rq->bio); |
3d6392cf JA |
222 | blk_put_request(rq); |
223 | return 0; | |
224 | } | |
3d6392cf | 225 | |
41e1703b FT |
226 | static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, |
227 | struct bio *bio) | |
3d6392cf JA |
228 | { |
229 | int r, ret = 0; | |
230 | ||
231 | /* | |
232 | * fill in all the output members | |
233 | */ | |
234 | hdr->status = rq->errors & 0xff; | |
235 | hdr->masked_status = status_byte(rq->errors); | |
236 | hdr->msg_status = msg_byte(rq->errors); | |
237 | hdr->host_status = host_byte(rq->errors); | |
238 | hdr->driver_status = driver_byte(rq->errors); | |
239 | hdr->info = 0; | |
240 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
241 | hdr->info |= SG_INFO_CHECK; | |
7a85f889 | 242 | hdr->resid = rq->data_len; |
3d6392cf JA |
243 | hdr->sb_len_wr = 0; |
244 | ||
245 | if (rq->sense_len && hdr->sbp) { | |
246 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
247 | ||
248 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
249 | hdr->sb_len_wr = len; | |
250 | else | |
251 | ret = -EFAULT; | |
252 | } | |
253 | ||
254 | rq->bio = bio; | |
255 | r = blk_unmap_sghdr_rq(rq, hdr); | |
256 | if (ret) | |
257 | r = ret; | |
258 | ||
259 | return r; | |
260 | } | |
3d6392cf | 261 | |
165125e1 | 262 | static int sg_io(struct file *file, struct request_queue *q, |
1da177e4 LT |
263 | struct gendisk *bd_disk, struct sg_io_hdr *hdr) |
264 | { | |
3d6392cf | 265 | unsigned long start_time; |
0b07de85 | 266 | int writing = 0, ret = 0; |
1da177e4 | 267 | struct request *rq; |
1da177e4 | 268 | char sense[SCSI_SENSE_BUFFERSIZE]; |
77d172ce | 269 | struct bio *bio; |
1da177e4 LT |
270 | |
271 | if (hdr->interface_id != 'S') | |
272 | return -EINVAL; | |
273 | if (hdr->cmd_len > BLK_MAX_CDB) | |
274 | return -EINVAL; | |
1da177e4 | 275 | |
defd94b7 | 276 | if (hdr->dxfer_len > (q->max_hw_sectors << 9)) |
1da177e4 LT |
277 | return -EIO; |
278 | ||
f1970baf | 279 | if (hdr->dxfer_len) |
1da177e4 LT |
280 | switch (hdr->dxfer_direction) { |
281 | default: | |
282 | return -EINVAL; | |
1da177e4 LT |
283 | case SG_DXFER_TO_DEV: |
284 | writing = 1; | |
285 | break; | |
616e8a09 | 286 | case SG_DXFER_TO_FROM_DEV: |
1da177e4 | 287 | case SG_DXFER_FROM_DEV: |
1da177e4 LT |
288 | break; |
289 | } | |
290 | ||
dd1cab95 JA |
291 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); |
292 | if (!rq) | |
293 | return -ENOMEM; | |
1da177e4 | 294 | |
0b07de85 | 295 | if (blk_fill_sghdr_rq(q, rq, hdr, file)) { |
3d6392cf JA |
296 | blk_put_request(rq); |
297 | return -EFAULT; | |
298 | } | |
1da177e4 | 299 | |
0e75f906 MC |
300 | if (hdr->iovec_count) { |
301 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
302 | struct sg_iovec *iov; | |
303 | ||
304 | iov = kmalloc(size, GFP_KERNEL); | |
305 | if (!iov) { | |
306 | ret = -ENOMEM; | |
307 | goto out; | |
308 | } | |
309 | ||
310 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
311 | kfree(iov); | |
312 | ret = -EFAULT; | |
313 | goto out; | |
314 | } | |
315 | ||
316 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count, | |
317 | hdr->dxfer_len); | |
318 | kfree(iov); | |
319 | } else if (hdr->dxfer_len) | |
320 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
321 | ||
322 | if (ret) | |
323 | goto out; | |
324 | ||
77d172ce | 325 | bio = rq->bio; |
3d6392cf JA |
326 | memset(sense, 0, sizeof(sense)); |
327 | rq->sense = sense; | |
328 | rq->sense_len = 0; | |
01840f9c JA |
329 | rq->retries = 0; |
330 | ||
1da177e4 LT |
331 | start_time = jiffies; |
332 | ||
333 | /* ignore return value. All information is passed back to caller | |
334 | * (if he doesn't check that is his problem). | |
335 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
336 | */ | |
994ca9a1 | 337 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 | 338 | |
24bb8fb9 | 339 | hdr->duration = jiffies_to_msecs(jiffies - start_time); |
1da177e4 | 340 | |
3d6392cf | 341 | return blk_complete_sghdr_rq(rq, hdr, bio); |
dd1cab95 JA |
342 | out: |
343 | blk_put_request(rq); | |
344 | return ret; | |
1da177e4 LT |
345 | } |
346 | ||
21b2f0c8 CH |
347 | /** |
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 | */ | |
1da177e4 | 380 | #define OMAX_SB_LEN 16 /* For backward compatibility */ |
21b2f0c8 CH |
381 | int sg_scsi_ioctl(struct file *file, struct request_queue *q, |
382 | struct gendisk *disk, struct scsi_ioctl_command __user *sic) | |
1da177e4 LT |
383 | { |
384 | struct request *rq; | |
abf54393 | 385 | int err, write_perm = 0; |
1da177e4 LT |
386 | unsigned int in_len, out_len, bytes, opcode, cmdlen; |
387 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
388 | ||
21b2f0c8 CH |
389 | if (!sic) |
390 | return -EINVAL; | |
391 | ||
1da177e4 LT |
392 | /* |
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) { | |
dd00cc48 | 406 | buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); |
1da177e4 LT |
407 | if (!buffer) |
408 | return -ENOMEM; | |
409 | ||
1da177e4 LT |
410 | } |
411 | ||
412 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
413 | ||
414 | cmdlen = COMMAND_SIZE(opcode); | |
415 | ||
416 | /* | |
417 | * get command and data to send to device, if any | |
418 | */ | |
419 | err = -EFAULT; | |
420 | rq->cmd_len = cmdlen; | |
421 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
422 | goto error; | |
423 | ||
21b2f0c8 | 424 | if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len)) |
1da177e4 LT |
425 | goto error; |
426 | ||
abf54393 FT |
427 | /* scsi_ioctl passes NULL */ |
428 | if (file && (file->f_mode & FMODE_WRITE)) | |
429 | write_perm = 1; | |
430 | ||
431 | err = blk_verify_command(&q->cmd_filter, rq->cmd, write_perm); | |
1da177e4 LT |
432 | if (err) |
433 | goto error; | |
434 | ||
21b2f0c8 CH |
435 | /* default. possible overriden later */ |
436 | rq->retries = 5; | |
437 | ||
1da177e4 | 438 | switch (opcode) { |
21b2f0c8 CH |
439 | case SEND_DIAGNOSTIC: |
440 | case FORMAT_UNIT: | |
441 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
442 | rq->retries = 1; | |
443 | break; | |
444 | case START_STOP: | |
445 | rq->timeout = START_STOP_TIMEOUT; | |
446 | break; | |
447 | case MOVE_MEDIUM: | |
448 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
449 | break; | |
450 | case READ_ELEMENT_STATUS: | |
451 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
452 | break; | |
453 | case READ_DEFECT_DATA: | |
454 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
455 | rq->retries = 1; | |
456 | break; | |
457 | default: | |
3d6392cf | 458 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
21b2f0c8 CH |
459 | break; |
460 | } | |
461 | ||
462 | if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) { | |
463 | err = DRIVER_ERROR << 24; | |
464 | goto out; | |
1da177e4 LT |
465 | } |
466 | ||
467 | memset(sense, 0, sizeof(sense)); | |
468 | rq->sense = sense; | |
469 | rq->sense_len = 0; | |
4aff5e23 | 470 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 471 | |
21b2f0c8 CH |
472 | blk_execute_rq(q, disk, rq, 0); |
473 | ||
474 | out: | |
1da177e4 LT |
475 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
476 | if (err) { | |
477 | if (rq->sense_len && rq->sense) { | |
478 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
479 | rq->sense_len : OMAX_SB_LEN; | |
480 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
481 | err = -EFAULT; | |
482 | } | |
483 | } else { | |
484 | if (copy_to_user(sic->data, buffer, out_len)) | |
485 | err = -EFAULT; | |
486 | } | |
487 | ||
488 | error: | |
489 | kfree(buffer); | |
490 | blk_put_request(rq); | |
491 | return err; | |
492 | } | |
21b2f0c8 | 493 | EXPORT_SYMBOL_GPL(sg_scsi_ioctl); |
f98d2dfd BC |
494 | |
495 | /* Send basic block requests */ | |
165125e1 JA |
496 | static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk, |
497 | int cmd, int data) | |
f98d2dfd BC |
498 | { |
499 | struct request *rq; | |
500 | int err; | |
501 | ||
502 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
4aff5e23 | 503 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
f98d2dfd BC |
504 | rq->data = NULL; |
505 | rq->data_len = 0; | |
7a85f889 | 506 | rq->extra_len = 0; |
3d6392cf | 507 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
f98d2dfd BC |
508 | rq->cmd[0] = cmd; |
509 | rq->cmd[4] = data; | |
510 | rq->cmd_len = 6; | |
511 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
512 | blk_put_request(rq); | |
513 | ||
514 | return err; | |
515 | } | |
516 | ||
165125e1 JA |
517 | static inline int blk_send_start_stop(struct request_queue *q, |
518 | struct gendisk *bd_disk, int data) | |
f98d2dfd BC |
519 | { |
520 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
521 | } | |
522 | ||
45e79a3a FT |
523 | int scsi_cmd_ioctl(struct file *file, struct request_queue *q, |
524 | struct gendisk *bd_disk, unsigned int cmd, void __user *arg) | |
1da177e4 | 525 | { |
f98d2dfd | 526 | int err; |
1da177e4 | 527 | |
45e79a3a | 528 | if (!q || blk_get_queue(q)) |
1da177e4 LT |
529 | return -ENXIO; |
530 | ||
531 | switch (cmd) { | |
532 | /* | |
533 | * new sgv3 interface | |
534 | */ | |
535 | case SG_GET_VERSION_NUM: | |
536 | err = sg_get_version(arg); | |
537 | break; | |
538 | case SCSI_IOCTL_GET_IDLUN: | |
539 | err = scsi_get_idlun(q, arg); | |
540 | break; | |
541 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
542 | err = scsi_get_bus(q, arg); | |
543 | break; | |
544 | case SG_SET_TIMEOUT: | |
545 | err = sg_set_timeout(q, arg); | |
546 | break; | |
547 | case SG_GET_TIMEOUT: | |
548 | err = sg_get_timeout(q); | |
549 | break; | |
550 | case SG_GET_RESERVED_SIZE: | |
551 | err = sg_get_reserved_size(q, arg); | |
552 | break; | |
553 | case SG_SET_RESERVED_SIZE: | |
554 | err = sg_set_reserved_size(q, arg); | |
555 | break; | |
556 | case SG_EMULATED_HOST: | |
557 | err = sg_emulated_host(q, arg); | |
558 | break; | |
559 | case SG_IO: { | |
560 | struct sg_io_hdr hdr; | |
561 | ||
562 | err = -EFAULT; | |
563 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
564 | break; | |
565 | err = sg_io(file, q, bd_disk, &hdr); | |
566 | if (err == -EFAULT) | |
567 | break; | |
568 | ||
569 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
570 | err = -EFAULT; | |
571 | break; | |
572 | } | |
573 | case CDROM_SEND_PACKET: { | |
574 | struct cdrom_generic_command cgc; | |
575 | struct sg_io_hdr hdr; | |
576 | ||
577 | err = -EFAULT; | |
578 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
579 | break; | |
580 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
581 | memset(&hdr, 0, sizeof(hdr)); | |
582 | hdr.interface_id = 'S'; | |
583 | hdr.cmd_len = sizeof(cgc.cmd); | |
584 | hdr.dxfer_len = cgc.buflen; | |
585 | err = 0; | |
586 | switch (cgc.data_direction) { | |
587 | case CGC_DATA_UNKNOWN: | |
588 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
589 | break; | |
590 | case CGC_DATA_WRITE: | |
591 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
592 | break; | |
593 | case CGC_DATA_READ: | |
594 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
595 | break; | |
596 | case CGC_DATA_NONE: | |
597 | hdr.dxfer_direction = SG_DXFER_NONE; | |
598 | break; | |
599 | default: | |
600 | err = -EINVAL; | |
601 | } | |
602 | if (err) | |
603 | break; | |
604 | ||
605 | hdr.dxferp = cgc.buffer; | |
606 | hdr.sbp = cgc.sense; | |
607 | if (hdr.sbp) | |
608 | hdr.mx_sb_len = sizeof(struct request_sense); | |
ad337591 | 609 | hdr.timeout = jiffies_to_msecs(cgc.timeout); |
1da177e4 LT |
610 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; |
611 | hdr.cmd_len = sizeof(cgc.cmd); | |
612 | ||
613 | err = sg_io(file, q, bd_disk, &hdr); | |
614 | if (err == -EFAULT) | |
615 | break; | |
616 | ||
617 | if (hdr.status) | |
618 | err = -EIO; | |
619 | ||
620 | cgc.stat = err; | |
621 | cgc.buflen = hdr.resid; | |
622 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
623 | err = -EFAULT; | |
624 | ||
625 | break; | |
626 | } | |
627 | ||
628 | /* | |
629 | * old junk scsi send command ioctl | |
630 | */ | |
631 | case SCSI_IOCTL_SEND_COMMAND: | |
632 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
633 | err = -EINVAL; | |
634 | if (!arg) | |
635 | break; | |
636 | ||
637 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
638 | break; | |
639 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
640 | err = blk_send_start_stop(q, bd_disk, 0x03); |
641 | break; | |
1da177e4 | 642 | case CDROMEJECT: |
f98d2dfd | 643 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
644 | break; |
645 | default: | |
646 | err = -ENOTTY; | |
647 | } | |
648 | ||
649 | blk_put_queue(q); | |
650 | return err; | |
651 | } | |
652 | ||
653 | EXPORT_SYMBOL(scsi_cmd_ioctl); |