Commit | Line | Data |
---|---|---|
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 | 62 | { |
2b91bafc | 63 | return jiffies_to_clock_t(q->sg_timeout); |
1da177e4 LT |
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) | |
2b91bafc | 71 | q->sg_timeout = clock_t_to_jiffies(timeout); |
1da177e4 LT |
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); | |
35e396cd | 188 | __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok); |
abf54393 FT |
189 | } |
190 | EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults); | |
191 | ||
165125e1 | 192 | static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq, |
5842e51f | 193 | struct sg_io_hdr *hdr, fmode_t mode) |
3d6392cf | 194 | { |
3d6392cf JA |
195 | if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len)) |
196 | return -EFAULT; | |
5842e51f | 197 | if (blk_verify_command(&q->cmd_filter, rq->cmd, 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; | |
f2f1fa78 LT |
211 | if (rq->timeout < BLK_MIN_SG_TIMEOUT) |
212 | rq->timeout = BLK_MIN_SG_TIMEOUT; | |
3d6392cf JA |
213 | |
214 | return 0; | |
215 | } | |
3d6392cf | 216 | |
41e1703b FT |
217 | static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, |
218 | struct bio *bio) | |
3d6392cf | 219 | { |
91e463c8 | 220 | int r, ret = 0; |
3d6392cf JA |
221 | |
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; | |
7a85f889 | 233 | hdr->resid = rq->data_len; |
3d6392cf JA |
234 | 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 | ||
91e463c8 FT |
245 | r = blk_rq_unmap_user(bio); |
246 | if (!ret) | |
247 | ret = r; | |
1cd96c24 | 248 | blk_put_request(rq); |
3d6392cf | 249 | |
1cd96c24 | 250 | return ret; |
3d6392cf | 251 | } |
3d6392cf | 252 | |
5842e51f AV |
253 | static int sg_io(struct request_queue *q, struct gendisk *bd_disk, |
254 | struct sg_io_hdr *hdr, fmode_t mode) | |
1da177e4 | 255 | { |
3d6392cf | 256 | unsigned long start_time; |
0b07de85 | 257 | int writing = 0, ret = 0; |
1da177e4 | 258 | struct request *rq; |
1da177e4 | 259 | char sense[SCSI_SENSE_BUFFERSIZE]; |
77d172ce | 260 | struct bio *bio; |
1da177e4 LT |
261 | |
262 | if (hdr->interface_id != 'S') | |
263 | return -EINVAL; | |
264 | if (hdr->cmd_len > BLK_MAX_CDB) | |
265 | return -EINVAL; | |
1da177e4 | 266 | |
defd94b7 | 267 | if (hdr->dxfer_len > (q->max_hw_sectors << 9)) |
1da177e4 LT |
268 | return -EIO; |
269 | ||
f1970baf | 270 | if (hdr->dxfer_len) |
1da177e4 LT |
271 | switch (hdr->dxfer_direction) { |
272 | default: | |
273 | return -EINVAL; | |
1da177e4 LT |
274 | case SG_DXFER_TO_DEV: |
275 | writing = 1; | |
276 | break; | |
616e8a09 | 277 | case SG_DXFER_TO_FROM_DEV: |
1da177e4 | 278 | case SG_DXFER_FROM_DEV: |
1da177e4 LT |
279 | break; |
280 | } | |
281 | ||
dd1cab95 JA |
282 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); |
283 | if (!rq) | |
284 | return -ENOMEM; | |
1da177e4 | 285 | |
5842e51f | 286 | if (blk_fill_sghdr_rq(q, rq, hdr, mode)) { |
3d6392cf JA |
287 | blk_put_request(rq); |
288 | return -EFAULT; | |
289 | } | |
1da177e4 | 290 | |
0e75f906 MC |
291 | if (hdr->iovec_count) { |
292 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
293 | struct sg_iovec *iov; | |
294 | ||
295 | iov = kmalloc(size, GFP_KERNEL); | |
296 | if (!iov) { | |
297 | ret = -ENOMEM; | |
298 | goto out; | |
299 | } | |
300 | ||
301 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
302 | kfree(iov); | |
303 | ret = -EFAULT; | |
304 | goto out; | |
305 | } | |
306 | ||
152e283f | 307 | ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count, |
a3bce90e | 308 | hdr->dxfer_len, GFP_KERNEL); |
0e75f906 MC |
309 | kfree(iov); |
310 | } else if (hdr->dxfer_len) | |
152e283f | 311 | ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len, |
a3bce90e | 312 | GFP_KERNEL); |
0e75f906 MC |
313 | |
314 | if (ret) | |
315 | goto out; | |
316 | ||
77d172ce | 317 | bio = rq->bio; |
3d6392cf JA |
318 | memset(sense, 0, sizeof(sense)); |
319 | rq->sense = sense; | |
320 | rq->sense_len = 0; | |
01840f9c JA |
321 | rq->retries = 0; |
322 | ||
1da177e4 LT |
323 | start_time = jiffies; |
324 | ||
325 | /* ignore return value. All information is passed back to caller | |
326 | * (if he doesn't check that is his problem). | |
327 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
328 | */ | |
994ca9a1 | 329 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 | 330 | |
24bb8fb9 | 331 | hdr->duration = jiffies_to_msecs(jiffies - start_time); |
1da177e4 | 332 | |
3d6392cf | 333 | return blk_complete_sghdr_rq(rq, hdr, bio); |
dd1cab95 JA |
334 | out: |
335 | blk_put_request(rq); | |
336 | return ret; | |
1da177e4 LT |
337 | } |
338 | ||
21b2f0c8 CH |
339 | /** |
340 | * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl | |
341 | * @file: file this ioctl operates on (optional) | |
342 | * @q: request queue to send scsi commands down | |
343 | * @disk: gendisk to operate on (option) | |
344 | * @sic: userspace structure describing the command to perform | |
345 | * | |
346 | * Send down the scsi command described by @sic to the device below | |
347 | * the request queue @q. If @file is non-NULL it's used to perform | |
348 | * fine-grained permission checks that allow users to send down | |
349 | * non-destructive SCSI commands. If the caller has a struct gendisk | |
350 | * available it should be passed in as @disk to allow the low level | |
351 | * driver to use the information contained in it. A non-NULL @disk | |
352 | * is only allowed if the caller knows that the low level driver doesn't | |
353 | * need it (e.g. in the scsi subsystem). | |
354 | * | |
355 | * Notes: | |
356 | * - This interface is deprecated - users should use the SG_IO | |
357 | * interface instead, as this is a more flexible approach to | |
358 | * performing SCSI commands on a device. | |
359 | * - The SCSI command length is determined by examining the 1st byte | |
360 | * of the given command. There is no way to override this. | |
361 | * - Data transfers are limited to PAGE_SIZE | |
362 | * - The length (x + y) must be at least OMAX_SB_LEN bytes long to | |
363 | * accommodate the sense buffer when an error occurs. | |
364 | * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that | |
365 | * old code will not be surprised. | |
366 | * - If a Unix error occurs (e.g. ENOMEM) then the user will receive | |
367 | * a negative return and the Unix error code in 'errno'. | |
368 | * If the SCSI command succeeds then 0 is returned. | |
369 | * Positive numbers returned are the compacted SCSI error codes (4 | |
370 | * bytes in one int) where the lowest byte is the SCSI status. | |
371 | */ | |
1da177e4 | 372 | #define OMAX_SB_LEN 16 /* For backward compatibility */ |
e915e872 AV |
373 | int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode, |
374 | struct scsi_ioctl_command __user *sic) | |
1da177e4 LT |
375 | { |
376 | struct request *rq; | |
aeb5d727 | 377 | int err; |
1da177e4 LT |
378 | unsigned int in_len, out_len, bytes, opcode, cmdlen; |
379 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
380 | ||
21b2f0c8 CH |
381 | if (!sic) |
382 | return -EINVAL; | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * get in an out lengths, verify they don't exceed a page worth of data | |
386 | */ | |
387 | if (get_user(in_len, &sic->inlen)) | |
388 | return -EFAULT; | |
389 | if (get_user(out_len, &sic->outlen)) | |
390 | return -EFAULT; | |
391 | if (in_len > PAGE_SIZE || out_len > PAGE_SIZE) | |
392 | return -EINVAL; | |
393 | if (get_user(opcode, sic->data)) | |
394 | return -EFAULT; | |
395 | ||
396 | bytes = max(in_len, out_len); | |
397 | if (bytes) { | |
dd00cc48 | 398 | buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); |
1da177e4 LT |
399 | if (!buffer) |
400 | return -ENOMEM; | |
401 | ||
1da177e4 LT |
402 | } |
403 | ||
404 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
405 | ||
406 | cmdlen = COMMAND_SIZE(opcode); | |
407 | ||
408 | /* | |
409 | * get command and data to send to device, if any | |
410 | */ | |
411 | err = -EFAULT; | |
412 | rq->cmd_len = cmdlen; | |
413 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
414 | goto error; | |
415 | ||
21b2f0c8 | 416 | if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len)) |
1da177e4 LT |
417 | goto error; |
418 | ||
e915e872 | 419 | err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE); |
1da177e4 LT |
420 | if (err) |
421 | goto error; | |
422 | ||
21b2f0c8 CH |
423 | /* default. possible overriden later */ |
424 | rq->retries = 5; | |
425 | ||
1da177e4 | 426 | switch (opcode) { |
21b2f0c8 CH |
427 | case SEND_DIAGNOSTIC: |
428 | case FORMAT_UNIT: | |
429 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
430 | rq->retries = 1; | |
431 | break; | |
432 | case START_STOP: | |
433 | rq->timeout = START_STOP_TIMEOUT; | |
434 | break; | |
435 | case MOVE_MEDIUM: | |
436 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
437 | break; | |
438 | case READ_ELEMENT_STATUS: | |
439 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
440 | break; | |
441 | case READ_DEFECT_DATA: | |
442 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
443 | rq->retries = 1; | |
444 | break; | |
445 | default: | |
3d6392cf | 446 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
21b2f0c8 CH |
447 | break; |
448 | } | |
449 | ||
450 | if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) { | |
451 | err = DRIVER_ERROR << 24; | |
452 | goto out; | |
1da177e4 LT |
453 | } |
454 | ||
455 | memset(sense, 0, sizeof(sense)); | |
456 | rq->sense = sense; | |
457 | rq->sense_len = 0; | |
4aff5e23 | 458 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 459 | |
21b2f0c8 CH |
460 | blk_execute_rq(q, disk, rq, 0); |
461 | ||
462 | out: | |
1da177e4 LT |
463 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
464 | if (err) { | |
465 | if (rq->sense_len && rq->sense) { | |
466 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
467 | rq->sense_len : OMAX_SB_LEN; | |
468 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
469 | err = -EFAULT; | |
470 | } | |
471 | } else { | |
472 | if (copy_to_user(sic->data, buffer, out_len)) | |
473 | err = -EFAULT; | |
474 | } | |
475 | ||
476 | error: | |
477 | kfree(buffer); | |
478 | blk_put_request(rq); | |
479 | return err; | |
480 | } | |
21b2f0c8 | 481 | EXPORT_SYMBOL_GPL(sg_scsi_ioctl); |
f98d2dfd BC |
482 | |
483 | /* Send basic block requests */ | |
165125e1 JA |
484 | static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk, |
485 | int cmd, int data) | |
f98d2dfd BC |
486 | { |
487 | struct request *rq; | |
488 | int err; | |
489 | ||
490 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
4aff5e23 | 491 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
f98d2dfd BC |
492 | rq->data = NULL; |
493 | rq->data_len = 0; | |
7a85f889 | 494 | rq->extra_len = 0; |
3d6392cf | 495 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
f98d2dfd BC |
496 | rq->cmd[0] = cmd; |
497 | rq->cmd[4] = data; | |
498 | rq->cmd_len = 6; | |
499 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
500 | blk_put_request(rq); | |
501 | ||
502 | return err; | |
503 | } | |
504 | ||
165125e1 JA |
505 | static inline int blk_send_start_stop(struct request_queue *q, |
506 | struct gendisk *bd_disk, int data) | |
f98d2dfd BC |
507 | { |
508 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
509 | } | |
510 | ||
74f3c8af AV |
511 | int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode, |
512 | unsigned int cmd, void __user *arg) | |
1da177e4 | 513 | { |
f98d2dfd | 514 | int err; |
1da177e4 | 515 | |
45e79a3a | 516 | if (!q || blk_get_queue(q)) |
1da177e4 LT |
517 | return -ENXIO; |
518 | ||
519 | switch (cmd) { | |
520 | /* | |
521 | * new sgv3 interface | |
522 | */ | |
523 | case SG_GET_VERSION_NUM: | |
524 | err = sg_get_version(arg); | |
525 | break; | |
526 | case SCSI_IOCTL_GET_IDLUN: | |
527 | err = scsi_get_idlun(q, arg); | |
528 | break; | |
529 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
530 | err = scsi_get_bus(q, arg); | |
531 | break; | |
532 | case SG_SET_TIMEOUT: | |
533 | err = sg_set_timeout(q, arg); | |
534 | break; | |
535 | case SG_GET_TIMEOUT: | |
536 | err = sg_get_timeout(q); | |
537 | break; | |
538 | case SG_GET_RESERVED_SIZE: | |
539 | err = sg_get_reserved_size(q, arg); | |
540 | break; | |
541 | case SG_SET_RESERVED_SIZE: | |
542 | err = sg_set_reserved_size(q, arg); | |
543 | break; | |
544 | case SG_EMULATED_HOST: | |
545 | err = sg_emulated_host(q, arg); | |
546 | break; | |
547 | case SG_IO: { | |
548 | struct sg_io_hdr hdr; | |
549 | ||
550 | err = -EFAULT; | |
551 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
552 | break; | |
74f3c8af | 553 | err = sg_io(q, bd_disk, &hdr, mode); |
1da177e4 LT |
554 | if (err == -EFAULT) |
555 | break; | |
556 | ||
557 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
558 | err = -EFAULT; | |
559 | break; | |
560 | } | |
561 | case CDROM_SEND_PACKET: { | |
562 | struct cdrom_generic_command cgc; | |
563 | struct sg_io_hdr hdr; | |
564 | ||
565 | err = -EFAULT; | |
566 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
567 | break; | |
568 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
569 | memset(&hdr, 0, sizeof(hdr)); | |
570 | hdr.interface_id = 'S'; | |
571 | hdr.cmd_len = sizeof(cgc.cmd); | |
572 | hdr.dxfer_len = cgc.buflen; | |
573 | err = 0; | |
574 | switch (cgc.data_direction) { | |
575 | case CGC_DATA_UNKNOWN: | |
576 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
577 | break; | |
578 | case CGC_DATA_WRITE: | |
579 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
580 | break; | |
581 | case CGC_DATA_READ: | |
582 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
583 | break; | |
584 | case CGC_DATA_NONE: | |
585 | hdr.dxfer_direction = SG_DXFER_NONE; | |
586 | break; | |
587 | default: | |
588 | err = -EINVAL; | |
589 | } | |
590 | if (err) | |
591 | break; | |
592 | ||
593 | hdr.dxferp = cgc.buffer; | |
594 | hdr.sbp = cgc.sense; | |
595 | if (hdr.sbp) | |
596 | hdr.mx_sb_len = sizeof(struct request_sense); | |
ad337591 | 597 | hdr.timeout = jiffies_to_msecs(cgc.timeout); |
1da177e4 LT |
598 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; |
599 | hdr.cmd_len = sizeof(cgc.cmd); | |
600 | ||
74f3c8af | 601 | err = sg_io(q, bd_disk, &hdr, mode); |
1da177e4 LT |
602 | if (err == -EFAULT) |
603 | break; | |
604 | ||
605 | if (hdr.status) | |
606 | err = -EIO; | |
607 | ||
608 | cgc.stat = err; | |
609 | cgc.buflen = hdr.resid; | |
610 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
611 | err = -EFAULT; | |
612 | ||
613 | break; | |
614 | } | |
615 | ||
616 | /* | |
617 | * old junk scsi send command ioctl | |
618 | */ | |
619 | case SCSI_IOCTL_SEND_COMMAND: | |
620 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
621 | err = -EINVAL; | |
622 | if (!arg) | |
623 | break; | |
624 | ||
74f3c8af | 625 | err = sg_scsi_ioctl(q, bd_disk, mode, arg); |
1da177e4 LT |
626 | break; |
627 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
628 | err = blk_send_start_stop(q, bd_disk, 0x03); |
629 | break; | |
1da177e4 | 630 | case CDROMEJECT: |
f98d2dfd | 631 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
632 | break; |
633 | default: | |
634 | err = -ENOTTY; | |
635 | } | |
636 | ||
637 | blk_put_queue(q); | |
638 | return err; | |
639 | } | |
640 | ||
641 | EXPORT_SYMBOL(scsi_cmd_ioctl); |