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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> | |
24 | #include <linux/completion.h> | |
25 | #include <linux/cdrom.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/times.h> | |
28 | #include <asm/uaccess.h> | |
29 | ||
30 | #include <scsi/scsi.h> | |
31 | #include <scsi/scsi_ioctl.h> | |
32 | #include <scsi/scsi_cmnd.h> | |
33 | ||
34 | /* Command group 3 is reserved and should never be used. */ | |
35 | const unsigned char scsi_command_size[8] = | |
36 | { | |
37 | 6, 10, 10, 12, | |
38 | 16, 12, 10, 10 | |
39 | }; | |
40 | ||
41 | EXPORT_SYMBOL(scsi_command_size); | |
42 | ||
43 | #define BLK_DEFAULT_TIMEOUT (60 * HZ) | |
44 | ||
45 | #include <scsi/sg.h> | |
46 | ||
47 | static int sg_get_version(int __user *p) | |
48 | { | |
64100099 | 49 | static const int sg_version_num = 30527; |
1da177e4 LT |
50 | return put_user(sg_version_num, p); |
51 | } | |
52 | ||
53 | static int scsi_get_idlun(request_queue_t *q, int __user *p) | |
54 | { | |
55 | return put_user(0, p); | |
56 | } | |
57 | ||
58 | static int scsi_get_bus(request_queue_t *q, int __user *p) | |
59 | { | |
60 | return put_user(0, p); | |
61 | } | |
62 | ||
63 | static int sg_get_timeout(request_queue_t *q) | |
64 | { | |
65 | return q->sg_timeout / (HZ / USER_HZ); | |
66 | } | |
67 | ||
68 | static int sg_set_timeout(request_queue_t *q, int __user *p) | |
69 | { | |
70 | int timeout, err = get_user(timeout, p); | |
71 | ||
72 | if (!err) | |
73 | q->sg_timeout = timeout * (HZ / USER_HZ); | |
74 | ||
75 | return err; | |
76 | } | |
77 | ||
78 | static int sg_get_reserved_size(request_queue_t *q, int __user *p) | |
79 | { | |
80 | return put_user(q->sg_reserved_size, p); | |
81 | } | |
82 | ||
83 | static int sg_set_reserved_size(request_queue_t *q, int __user *p) | |
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 | */ | |
103 | static int sg_emulated_host(request_queue_t *q, int __user *p) | |
104 | { | |
105 | return put_user(1, p); | |
106 | } | |
107 | ||
108 | #define CMD_READ_SAFE 0x01 | |
109 | #define CMD_WRITE_SAFE 0x02 | |
110 | #define CMD_WARNED 0x04 | |
111 | #define safe_for_read(cmd) [cmd] = CMD_READ_SAFE | |
112 | #define safe_for_write(cmd) [cmd] = CMD_WRITE_SAFE | |
113 | ||
114 | static int verify_command(struct file *file, unsigned char *cmd) | |
115 | { | |
116 | static unsigned char cmd_type[256] = { | |
117 | ||
118 | /* Basic read-only commands */ | |
119 | safe_for_read(TEST_UNIT_READY), | |
120 | safe_for_read(REQUEST_SENSE), | |
121 | safe_for_read(READ_6), | |
122 | safe_for_read(READ_10), | |
123 | safe_for_read(READ_12), | |
124 | safe_for_read(READ_16), | |
125 | safe_for_read(READ_BUFFER), | |
942fc2fb | 126 | safe_for_read(READ_DEFECT_DATA), |
1da177e4 LT |
127 | safe_for_read(READ_LONG), |
128 | safe_for_read(INQUIRY), | |
129 | safe_for_read(MODE_SENSE), | |
130 | safe_for_read(MODE_SENSE_10), | |
131 | safe_for_read(LOG_SENSE), | |
132 | safe_for_read(START_STOP), | |
133 | safe_for_read(GPCMD_VERIFY_10), | |
134 | safe_for_read(VERIFY_16), | |
135 | ||
136 | /* Audio CD commands */ | |
137 | safe_for_read(GPCMD_PLAY_CD), | |
138 | safe_for_read(GPCMD_PLAY_AUDIO_10), | |
139 | safe_for_read(GPCMD_PLAY_AUDIO_MSF), | |
140 | safe_for_read(GPCMD_PLAY_AUDIO_TI), | |
141 | safe_for_read(GPCMD_PAUSE_RESUME), | |
142 | ||
143 | /* CD/DVD data reading */ | |
144 | safe_for_read(GPCMD_READ_BUFFER_CAPACITY), | |
145 | safe_for_read(GPCMD_READ_CD), | |
146 | safe_for_read(GPCMD_READ_CD_MSF), | |
147 | safe_for_read(GPCMD_READ_DISC_INFO), | |
148 | safe_for_read(GPCMD_READ_CDVD_CAPACITY), | |
149 | safe_for_read(GPCMD_READ_DVD_STRUCTURE), | |
150 | safe_for_read(GPCMD_READ_HEADER), | |
151 | safe_for_read(GPCMD_READ_TRACK_RZONE_INFO), | |
152 | safe_for_read(GPCMD_READ_SUBCHANNEL), | |
153 | safe_for_read(GPCMD_READ_TOC_PMA_ATIP), | |
154 | safe_for_read(GPCMD_REPORT_KEY), | |
155 | safe_for_read(GPCMD_SCAN), | |
156 | safe_for_read(GPCMD_GET_CONFIGURATION), | |
157 | safe_for_read(GPCMD_READ_FORMAT_CAPACITIES), | |
158 | safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION), | |
159 | safe_for_read(GPCMD_GET_PERFORMANCE), | |
160 | safe_for_read(GPCMD_SEEK), | |
161 | safe_for_read(GPCMD_STOP_PLAY_SCAN), | |
162 | ||
163 | /* Basic writing commands */ | |
164 | safe_for_write(WRITE_6), | |
165 | safe_for_write(WRITE_10), | |
166 | safe_for_write(WRITE_VERIFY), | |
167 | safe_for_write(WRITE_12), | |
168 | safe_for_write(WRITE_VERIFY_12), | |
169 | safe_for_write(WRITE_16), | |
170 | safe_for_write(WRITE_LONG), | |
0faf3d3d | 171 | safe_for_write(WRITE_LONG_2), |
1da177e4 LT |
172 | safe_for_write(ERASE), |
173 | safe_for_write(GPCMD_MODE_SELECT_10), | |
174 | safe_for_write(MODE_SELECT), | |
175 | safe_for_write(LOG_SELECT), | |
176 | safe_for_write(GPCMD_BLANK), | |
177 | safe_for_write(GPCMD_CLOSE_TRACK), | |
178 | safe_for_write(GPCMD_FLUSH_CACHE), | |
179 | safe_for_write(GPCMD_FORMAT_UNIT), | |
180 | safe_for_write(GPCMD_REPAIR_RZONE_TRACK), | |
181 | safe_for_write(GPCMD_RESERVE_RZONE_TRACK), | |
182 | safe_for_write(GPCMD_SEND_DVD_STRUCTURE), | |
183 | safe_for_write(GPCMD_SEND_EVENT), | |
184 | safe_for_write(GPCMD_SEND_KEY), | |
185 | safe_for_write(GPCMD_SEND_OPC), | |
186 | safe_for_write(GPCMD_SEND_CUE_SHEET), | |
187 | safe_for_write(GPCMD_SET_SPEED), | |
188 | safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL), | |
189 | safe_for_write(GPCMD_LOAD_UNLOAD), | |
190 | safe_for_write(GPCMD_SET_STREAMING), | |
191 | }; | |
192 | unsigned char type = cmd_type[cmd[0]]; | |
5a57be8d | 193 | int has_write_perm = 0; |
1da177e4 LT |
194 | |
195 | /* Anybody who can open the device can do a read-safe command */ | |
196 | if (type & CMD_READ_SAFE) | |
197 | return 0; | |
198 | ||
5a57be8d JA |
199 | /* |
200 | * file can be NULL from ioctl_by_bdev()... | |
201 | */ | |
202 | if (file) | |
203 | has_write_perm = file->f_mode & FMODE_WRITE; | |
204 | ||
1da177e4 | 205 | /* Write-safe commands just require a writable open.. */ |
5a57be8d JA |
206 | if ((type & CMD_WRITE_SAFE) && has_write_perm) |
207 | return 0; | |
1da177e4 | 208 | |
3b0e77bd JA |
209 | /* And root can do any command.. */ |
210 | if (capable(CAP_SYS_RAWIO)) | |
211 | return 0; | |
212 | ||
1da177e4 LT |
213 | if (!type) { |
214 | cmd_type[cmd[0]] = CMD_WARNED; | |
215 | printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]); | |
216 | } | |
217 | ||
1da177e4 LT |
218 | /* Otherwise fail it with an "Operation not permitted" */ |
219 | return -EPERM; | |
220 | } | |
221 | ||
222 | static int sg_io(struct file *file, request_queue_t *q, | |
223 | struct gendisk *bd_disk, struct sg_io_hdr *hdr) | |
224 | { | |
225 | unsigned long start_time; | |
f63eb21b | 226 | int writing = 0, ret = 0; |
1da177e4 LT |
227 | struct request *rq; |
228 | struct bio *bio; | |
229 | char sense[SCSI_SENSE_BUFFERSIZE]; | |
230 | unsigned char cmd[BLK_MAX_CDB]; | |
231 | ||
232 | if (hdr->interface_id != 'S') | |
233 | return -EINVAL; | |
234 | if (hdr->cmd_len > BLK_MAX_CDB) | |
235 | return -EINVAL; | |
236 | if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len)) | |
237 | return -EFAULT; | |
238 | if (verify_command(file, cmd)) | |
239 | return -EPERM; | |
240 | ||
defd94b7 | 241 | if (hdr->dxfer_len > (q->max_hw_sectors << 9)) |
1da177e4 LT |
242 | return -EIO; |
243 | ||
f1970baf | 244 | if (hdr->dxfer_len) |
1da177e4 LT |
245 | switch (hdr->dxfer_direction) { |
246 | default: | |
247 | return -EINVAL; | |
248 | case SG_DXFER_TO_FROM_DEV: | |
1da177e4 LT |
249 | case SG_DXFER_TO_DEV: |
250 | writing = 1; | |
251 | break; | |
252 | case SG_DXFER_FROM_DEV: | |
1da177e4 LT |
253 | break; |
254 | } | |
255 | ||
dd1cab95 JA |
256 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); |
257 | if (!rq) | |
258 | return -ENOMEM; | |
1da177e4 | 259 | |
f1970baf JB |
260 | if (hdr->iovec_count) { |
261 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
262 | struct sg_iovec *iov; | |
263 | ||
264 | iov = kmalloc(size, GFP_KERNEL); | |
265 | if (!iov) { | |
266 | ret = -ENOMEM; | |
dd1cab95 | 267 | goto out; |
f1970baf JB |
268 | } |
269 | ||
270 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
271 | kfree(iov); | |
272 | ret = -EFAULT; | |
273 | goto out; | |
274 | } | |
275 | ||
276 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count); | |
277 | kfree(iov); | |
278 | } else if (hdr->dxfer_len) | |
279 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
280 | ||
281 | if (ret) | |
282 | goto out; | |
1da177e4 LT |
283 | |
284 | /* | |
285 | * fill in request structure | |
286 | */ | |
287 | rq->cmd_len = hdr->cmd_len; | |
288 | memcpy(rq->cmd, cmd, hdr->cmd_len); | |
289 | if (sizeof(rq->cmd) != hdr->cmd_len) | |
290 | memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len); | |
291 | ||
292 | memset(sense, 0, sizeof(sense)); | |
293 | rq->sense = sense; | |
294 | rq->sense_len = 0; | |
295 | ||
296 | rq->flags |= REQ_BLOCK_PC; | |
297 | bio = rq->bio; | |
298 | ||
299 | /* | |
300 | * bounce this after holding a reference to the original bio, it's | |
301 | * needed for proper unmapping | |
302 | */ | |
303 | if (rq->bio) | |
304 | blk_queue_bounce(q, &rq->bio); | |
305 | ||
306 | rq->timeout = (hdr->timeout * HZ) / 1000; | |
307 | if (!rq->timeout) | |
308 | rq->timeout = q->sg_timeout; | |
309 | if (!rq->timeout) | |
310 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
311 | ||
312 | start_time = jiffies; | |
313 | ||
314 | /* ignore return value. All information is passed back to caller | |
315 | * (if he doesn't check that is his problem). | |
316 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
317 | */ | |
994ca9a1 | 318 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 LT |
319 | |
320 | /* write to all output members */ | |
321 | hdr->status = 0xff & rq->errors; | |
322 | hdr->masked_status = status_byte(rq->errors); | |
323 | hdr->msg_status = msg_byte(rq->errors); | |
324 | hdr->host_status = host_byte(rq->errors); | |
325 | hdr->driver_status = driver_byte(rq->errors); | |
326 | hdr->info = 0; | |
327 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
328 | hdr->info |= SG_INFO_CHECK; | |
329 | hdr->resid = rq->data_len; | |
330 | hdr->duration = ((jiffies - start_time) * 1000) / HZ; | |
331 | hdr->sb_len_wr = 0; | |
332 | ||
333 | if (rq->sense_len && hdr->sbp) { | |
334 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
335 | ||
336 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
337 | hdr->sb_len_wr = len; | |
338 | } | |
339 | ||
e1f546e1 | 340 | if (blk_rq_unmap_user(bio, hdr->dxfer_len)) |
dd1cab95 | 341 | ret = -EFAULT; |
1da177e4 LT |
342 | |
343 | /* may not have succeeded, but output values written to control | |
344 | * structure (struct sg_io_hdr). */ | |
dd1cab95 JA |
345 | out: |
346 | blk_put_request(rq); | |
347 | return ret; | |
1da177e4 LT |
348 | } |
349 | ||
1da177e4 LT |
350 | #define OMAX_SB_LEN 16 /* For backward compatibility */ |
351 | ||
352 | static int sg_scsi_ioctl(struct file *file, request_queue_t *q, | |
353 | struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic) | |
354 | { | |
355 | struct request *rq; | |
356 | int err; | |
357 | unsigned int in_len, out_len, bytes, opcode, cmdlen; | |
358 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
359 | ||
360 | /* | |
361 | * get in an out lengths, verify they don't exceed a page worth of data | |
362 | */ | |
363 | if (get_user(in_len, &sic->inlen)) | |
364 | return -EFAULT; | |
365 | if (get_user(out_len, &sic->outlen)) | |
366 | return -EFAULT; | |
367 | if (in_len > PAGE_SIZE || out_len > PAGE_SIZE) | |
368 | return -EINVAL; | |
369 | if (get_user(opcode, sic->data)) | |
370 | return -EFAULT; | |
371 | ||
372 | bytes = max(in_len, out_len); | |
373 | if (bytes) { | |
374 | buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); | |
375 | if (!buffer) | |
376 | return -ENOMEM; | |
377 | ||
378 | memset(buffer, 0, bytes); | |
379 | } | |
380 | ||
381 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
382 | ||
383 | cmdlen = COMMAND_SIZE(opcode); | |
384 | ||
385 | /* | |
386 | * get command and data to send to device, if any | |
387 | */ | |
388 | err = -EFAULT; | |
389 | rq->cmd_len = cmdlen; | |
390 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
391 | goto error; | |
392 | ||
393 | if (copy_from_user(buffer, sic->data + cmdlen, in_len)) | |
394 | goto error; | |
395 | ||
396 | err = verify_command(file, rq->cmd); | |
397 | if (err) | |
398 | goto error; | |
399 | ||
400 | switch (opcode) { | |
401 | case SEND_DIAGNOSTIC: | |
402 | case FORMAT_UNIT: | |
403 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
404 | break; | |
405 | case START_STOP: | |
406 | rq->timeout = START_STOP_TIMEOUT; | |
407 | break; | |
408 | case MOVE_MEDIUM: | |
409 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
410 | break; | |
411 | case READ_ELEMENT_STATUS: | |
412 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
413 | break; | |
414 | case READ_DEFECT_DATA: | |
415 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
416 | break; | |
417 | default: | |
418 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
419 | break; | |
420 | } | |
421 | ||
422 | memset(sense, 0, sizeof(sense)); | |
423 | rq->sense = sense; | |
424 | rq->sense_len = 0; | |
425 | ||
426 | rq->data = buffer; | |
427 | rq->data_len = bytes; | |
428 | rq->flags |= REQ_BLOCK_PC; | |
429 | ||
994ca9a1 | 430 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 LT |
431 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
432 | if (err) { | |
433 | if (rq->sense_len && rq->sense) { | |
434 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
435 | rq->sense_len : OMAX_SB_LEN; | |
436 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
437 | err = -EFAULT; | |
438 | } | |
439 | } else { | |
440 | if (copy_to_user(sic->data, buffer, out_len)) | |
441 | err = -EFAULT; | |
442 | } | |
443 | ||
444 | error: | |
445 | kfree(buffer); | |
446 | blk_put_request(rq); | |
447 | return err; | |
448 | } | |
449 | ||
f98d2dfd BC |
450 | |
451 | /* Send basic block requests */ | |
452 | static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data) | |
453 | { | |
454 | struct request *rq; | |
455 | int err; | |
456 | ||
457 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
458 | rq->flags |= REQ_BLOCK_PC; | |
459 | rq->data = NULL; | |
460 | rq->data_len = 0; | |
461 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
462 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
463 | rq->cmd[0] = cmd; | |
464 | rq->cmd[4] = data; | |
465 | rq->cmd_len = 6; | |
466 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
467 | blk_put_request(rq); | |
468 | ||
469 | return err; | |
470 | } | |
471 | ||
472 | static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data) | |
473 | { | |
474 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
475 | } | |
476 | ||
1da177e4 LT |
477 | int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg) |
478 | { | |
479 | request_queue_t *q; | |
f98d2dfd | 480 | int err; |
1da177e4 LT |
481 | |
482 | q = bd_disk->queue; | |
483 | if (!q) | |
484 | return -ENXIO; | |
485 | ||
486 | if (blk_get_queue(q)) | |
487 | return -ENXIO; | |
488 | ||
489 | switch (cmd) { | |
490 | /* | |
491 | * new sgv3 interface | |
492 | */ | |
493 | case SG_GET_VERSION_NUM: | |
494 | err = sg_get_version(arg); | |
495 | break; | |
496 | case SCSI_IOCTL_GET_IDLUN: | |
497 | err = scsi_get_idlun(q, arg); | |
498 | break; | |
499 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
500 | err = scsi_get_bus(q, arg); | |
501 | break; | |
502 | case SG_SET_TIMEOUT: | |
503 | err = sg_set_timeout(q, arg); | |
504 | break; | |
505 | case SG_GET_TIMEOUT: | |
506 | err = sg_get_timeout(q); | |
507 | break; | |
508 | case SG_GET_RESERVED_SIZE: | |
509 | err = sg_get_reserved_size(q, arg); | |
510 | break; | |
511 | case SG_SET_RESERVED_SIZE: | |
512 | err = sg_set_reserved_size(q, arg); | |
513 | break; | |
514 | case SG_EMULATED_HOST: | |
515 | err = sg_emulated_host(q, arg); | |
516 | break; | |
517 | case SG_IO: { | |
518 | struct sg_io_hdr hdr; | |
519 | ||
520 | err = -EFAULT; | |
521 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
522 | break; | |
523 | err = sg_io(file, q, bd_disk, &hdr); | |
524 | if (err == -EFAULT) | |
525 | break; | |
526 | ||
527 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
528 | err = -EFAULT; | |
529 | break; | |
530 | } | |
531 | case CDROM_SEND_PACKET: { | |
532 | struct cdrom_generic_command cgc; | |
533 | struct sg_io_hdr hdr; | |
534 | ||
535 | err = -EFAULT; | |
536 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
537 | break; | |
538 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
539 | memset(&hdr, 0, sizeof(hdr)); | |
540 | hdr.interface_id = 'S'; | |
541 | hdr.cmd_len = sizeof(cgc.cmd); | |
542 | hdr.dxfer_len = cgc.buflen; | |
543 | err = 0; | |
544 | switch (cgc.data_direction) { | |
545 | case CGC_DATA_UNKNOWN: | |
546 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
547 | break; | |
548 | case CGC_DATA_WRITE: | |
549 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
550 | break; | |
551 | case CGC_DATA_READ: | |
552 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
553 | break; | |
554 | case CGC_DATA_NONE: | |
555 | hdr.dxfer_direction = SG_DXFER_NONE; | |
556 | break; | |
557 | default: | |
558 | err = -EINVAL; | |
559 | } | |
560 | if (err) | |
561 | break; | |
562 | ||
563 | hdr.dxferp = cgc.buffer; | |
564 | hdr.sbp = cgc.sense; | |
565 | if (hdr.sbp) | |
566 | hdr.mx_sb_len = sizeof(struct request_sense); | |
567 | hdr.timeout = cgc.timeout; | |
568 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; | |
569 | hdr.cmd_len = sizeof(cgc.cmd); | |
570 | ||
571 | err = sg_io(file, q, bd_disk, &hdr); | |
572 | if (err == -EFAULT) | |
573 | break; | |
574 | ||
575 | if (hdr.status) | |
576 | err = -EIO; | |
577 | ||
578 | cgc.stat = err; | |
579 | cgc.buflen = hdr.resid; | |
580 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
581 | err = -EFAULT; | |
582 | ||
583 | break; | |
584 | } | |
585 | ||
586 | /* | |
587 | * old junk scsi send command ioctl | |
588 | */ | |
589 | case SCSI_IOCTL_SEND_COMMAND: | |
590 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
591 | err = -EINVAL; | |
592 | if (!arg) | |
593 | break; | |
594 | ||
595 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
596 | break; | |
597 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
598 | err = blk_send_start_stop(q, bd_disk, 0x03); |
599 | break; | |
1da177e4 | 600 | case CDROMEJECT: |
f98d2dfd | 601 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
602 | break; |
603 | default: | |
604 | err = -ENOTTY; | |
605 | } | |
606 | ||
607 | blk_put_queue(q); | |
608 | return err; | |
609 | } | |
610 | ||
611 | EXPORT_SYMBOL(scsi_cmd_ioctl); |