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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 | { | |
49 | static int sg_version_num = 30527; | |
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), | |
126 | safe_for_read(READ_DEFECT_DATA), | |
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), | |
171 | safe_for_write(ERASE), | |
172 | safe_for_write(GPCMD_MODE_SELECT_10), | |
173 | safe_for_write(MODE_SELECT), | |
174 | safe_for_write(LOG_SELECT), | |
175 | safe_for_write(GPCMD_BLANK), | |
176 | safe_for_write(GPCMD_CLOSE_TRACK), | |
177 | safe_for_write(GPCMD_FLUSH_CACHE), | |
178 | safe_for_write(GPCMD_FORMAT_UNIT), | |
179 | safe_for_write(GPCMD_REPAIR_RZONE_TRACK), | |
180 | safe_for_write(GPCMD_RESERVE_RZONE_TRACK), | |
181 | safe_for_write(GPCMD_SEND_DVD_STRUCTURE), | |
182 | safe_for_write(GPCMD_SEND_EVENT), | |
183 | safe_for_write(GPCMD_SEND_KEY), | |
184 | safe_for_write(GPCMD_SEND_OPC), | |
185 | safe_for_write(GPCMD_SEND_CUE_SHEET), | |
186 | safe_for_write(GPCMD_SET_SPEED), | |
187 | safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL), | |
188 | safe_for_write(GPCMD_LOAD_UNLOAD), | |
189 | safe_for_write(GPCMD_SET_STREAMING), | |
190 | }; | |
191 | unsigned char type = cmd_type[cmd[0]]; | |
192 | ||
193 | /* Anybody who can open the device can do a read-safe command */ | |
194 | if (type & CMD_READ_SAFE) | |
195 | return 0; | |
196 | ||
197 | /* Write-safe commands just require a writable open.. */ | |
198 | if (type & CMD_WRITE_SAFE) { | |
199 | if (file->f_mode & FMODE_WRITE) | |
200 | return 0; | |
201 | } | |
202 | ||
203 | if (!type) { | |
204 | cmd_type[cmd[0]] = CMD_WARNED; | |
205 | printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]); | |
206 | } | |
207 | ||
208 | /* And root can do any command.. */ | |
209 | if (capable(CAP_SYS_RAWIO)) | |
210 | return 0; | |
211 | ||
212 | /* Otherwise fail it with an "Operation not permitted" */ | |
213 | return -EPERM; | |
214 | } | |
215 | ||
216 | static int sg_io(struct file *file, request_queue_t *q, | |
217 | struct gendisk *bd_disk, struct sg_io_hdr *hdr) | |
218 | { | |
219 | unsigned long start_time; | |
220 | int writing = 0, ret = 0; | |
221 | struct request *rq; | |
222 | struct bio *bio; | |
223 | char sense[SCSI_SENSE_BUFFERSIZE]; | |
224 | unsigned char cmd[BLK_MAX_CDB]; | |
225 | ||
226 | if (hdr->interface_id != 'S') | |
227 | return -EINVAL; | |
228 | if (hdr->cmd_len > BLK_MAX_CDB) | |
229 | return -EINVAL; | |
230 | if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len)) | |
231 | return -EFAULT; | |
232 | if (verify_command(file, cmd)) | |
233 | return -EPERM; | |
234 | ||
235 | if (hdr->dxfer_len > (q->max_sectors << 9)) | |
236 | return -EIO; | |
237 | ||
238 | if (hdr->dxfer_len) | |
239 | switch (hdr->dxfer_direction) { | |
240 | default: | |
241 | return -EINVAL; | |
242 | case SG_DXFER_TO_FROM_DEV: | |
243 | case SG_DXFER_TO_DEV: | |
244 | writing = 1; | |
245 | break; | |
246 | case SG_DXFER_FROM_DEV: | |
247 | break; | |
248 | } | |
249 | ||
250 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); | |
251 | if (!rq) | |
252 | return -ENOMEM; | |
253 | ||
254 | if (hdr->iovec_count) { | |
255 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
256 | struct sg_iovec *iov; | |
257 | ||
258 | iov = kmalloc(size, GFP_KERNEL); | |
259 | if (!iov) { | |
260 | ret = -ENOMEM; | |
261 | goto out; | |
262 | } | |
263 | ||
264 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
265 | kfree(iov); | |
266 | ret = -EFAULT; | |
267 | goto out; | |
268 | } | |
269 | ||
270 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count); | |
271 | kfree(iov); | |
272 | } else if (hdr->dxfer_len) | |
273 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
274 | ||
275 | if (ret) | |
276 | goto out; | |
277 | ||
278 | /* | |
279 | * fill in request structure | |
280 | */ | |
281 | rq->cmd_len = hdr->cmd_len; | |
282 | memcpy(rq->cmd, cmd, hdr->cmd_len); | |
283 | if (sizeof(rq->cmd) != hdr->cmd_len) | |
284 | memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len); | |
285 | ||
286 | memset(sense, 0, sizeof(sense)); | |
287 | rq->sense = sense; | |
288 | rq->sense_len = 0; | |
289 | ||
290 | rq->flags |= REQ_BLOCK_PC; | |
291 | bio = rq->bio; | |
292 | ||
293 | /* | |
294 | * bounce this after holding a reference to the original bio, it's | |
295 | * needed for proper unmapping | |
296 | */ | |
297 | if (rq->bio) | |
298 | blk_queue_bounce(q, &rq->bio); | |
299 | ||
300 | rq->timeout = (hdr->timeout * HZ) / 1000; | |
301 | if (!rq->timeout) | |
302 | rq->timeout = q->sg_timeout; | |
303 | if (!rq->timeout) | |
304 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
305 | ||
306 | start_time = jiffies; | |
307 | ||
308 | /* ignore return value. All information is passed back to caller | |
309 | * (if he doesn't check that is his problem). | |
310 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
311 | */ | |
312 | blk_execute_rq(q, bd_disk, rq, 0); | |
313 | ||
314 | /* write to all output members */ | |
315 | hdr->status = 0xff & rq->errors; | |
316 | hdr->masked_status = status_byte(rq->errors); | |
317 | hdr->msg_status = msg_byte(rq->errors); | |
318 | hdr->host_status = host_byte(rq->errors); | |
319 | hdr->driver_status = driver_byte(rq->errors); | |
320 | hdr->info = 0; | |
321 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
322 | hdr->info |= SG_INFO_CHECK; | |
323 | hdr->resid = rq->data_len; | |
324 | hdr->duration = ((jiffies - start_time) * 1000) / HZ; | |
325 | hdr->sb_len_wr = 0; | |
326 | ||
327 | if (rq->sense_len && hdr->sbp) { | |
328 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
329 | ||
330 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
331 | hdr->sb_len_wr = len; | |
332 | } | |
333 | ||
334 | if (blk_rq_unmap_user(bio, hdr->dxfer_len)) | |
335 | ret = -EFAULT; | |
336 | ||
337 | /* may not have succeeded, but output values written to control | |
338 | * structure (struct sg_io_hdr). */ | |
339 | out: | |
340 | blk_put_request(rq); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | #define OMAX_SB_LEN 16 /* For backward compatibility */ | |
345 | ||
346 | static int sg_scsi_ioctl(struct file *file, request_queue_t *q, | |
347 | struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic) | |
348 | { | |
349 | struct request *rq; | |
350 | int err; | |
351 | unsigned int in_len, out_len, bytes, opcode, cmdlen; | |
352 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
353 | ||
354 | /* | |
355 | * get in an out lengths, verify they don't exceed a page worth of data | |
356 | */ | |
357 | if (get_user(in_len, &sic->inlen)) | |
358 | return -EFAULT; | |
359 | if (get_user(out_len, &sic->outlen)) | |
360 | return -EFAULT; | |
361 | if (in_len > PAGE_SIZE || out_len > PAGE_SIZE) | |
362 | return -EINVAL; | |
363 | if (get_user(opcode, sic->data)) | |
364 | return -EFAULT; | |
365 | ||
366 | bytes = max(in_len, out_len); | |
367 | if (bytes) { | |
368 | buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); | |
369 | if (!buffer) | |
370 | return -ENOMEM; | |
371 | ||
372 | memset(buffer, 0, bytes); | |
373 | } | |
374 | ||
375 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
376 | ||
377 | cmdlen = COMMAND_SIZE(opcode); | |
378 | ||
379 | /* | |
380 | * get command and data to send to device, if any | |
381 | */ | |
382 | err = -EFAULT; | |
383 | rq->cmd_len = cmdlen; | |
384 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
385 | goto error; | |
386 | ||
387 | if (copy_from_user(buffer, sic->data + cmdlen, in_len)) | |
388 | goto error; | |
389 | ||
390 | err = verify_command(file, rq->cmd); | |
391 | if (err) | |
392 | goto error; | |
393 | ||
394 | switch (opcode) { | |
395 | case SEND_DIAGNOSTIC: | |
396 | case FORMAT_UNIT: | |
397 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
398 | break; | |
399 | case START_STOP: | |
400 | rq->timeout = START_STOP_TIMEOUT; | |
401 | break; | |
402 | case MOVE_MEDIUM: | |
403 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
404 | break; | |
405 | case READ_ELEMENT_STATUS: | |
406 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
407 | break; | |
408 | case READ_DEFECT_DATA: | |
409 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
410 | break; | |
411 | default: | |
412 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
413 | break; | |
414 | } | |
415 | ||
416 | memset(sense, 0, sizeof(sense)); | |
417 | rq->sense = sense; | |
418 | rq->sense_len = 0; | |
419 | ||
420 | rq->data = buffer; | |
421 | rq->data_len = bytes; | |
422 | rq->flags |= REQ_BLOCK_PC; | |
423 | ||
424 | blk_execute_rq(q, bd_disk, rq, 0); | |
425 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ | |
426 | if (err) { | |
427 | if (rq->sense_len && rq->sense) { | |
428 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
429 | rq->sense_len : OMAX_SB_LEN; | |
430 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
431 | err = -EFAULT; | |
432 | } | |
433 | } else { | |
434 | if (copy_to_user(sic->data, buffer, out_len)) | |
435 | err = -EFAULT; | |
436 | } | |
437 | ||
438 | error: | |
439 | kfree(buffer); | |
440 | blk_put_request(rq); | |
441 | return err; | |
442 | } | |
443 | ||
444 | int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg) | |
445 | { | |
446 | request_queue_t *q; | |
447 | struct request *rq; | |
448 | int close = 0, err; | |
449 | ||
450 | q = bd_disk->queue; | |
451 | if (!q) | |
452 | return -ENXIO; | |
453 | ||
454 | if (blk_get_queue(q)) | |
455 | return -ENXIO; | |
456 | ||
457 | switch (cmd) { | |
458 | /* | |
459 | * new sgv3 interface | |
460 | */ | |
461 | case SG_GET_VERSION_NUM: | |
462 | err = sg_get_version(arg); | |
463 | break; | |
464 | case SCSI_IOCTL_GET_IDLUN: | |
465 | err = scsi_get_idlun(q, arg); | |
466 | break; | |
467 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
468 | err = scsi_get_bus(q, arg); | |
469 | break; | |
470 | case SG_SET_TIMEOUT: | |
471 | err = sg_set_timeout(q, arg); | |
472 | break; | |
473 | case SG_GET_TIMEOUT: | |
474 | err = sg_get_timeout(q); | |
475 | break; | |
476 | case SG_GET_RESERVED_SIZE: | |
477 | err = sg_get_reserved_size(q, arg); | |
478 | break; | |
479 | case SG_SET_RESERVED_SIZE: | |
480 | err = sg_set_reserved_size(q, arg); | |
481 | break; | |
482 | case SG_EMULATED_HOST: | |
483 | err = sg_emulated_host(q, arg); | |
484 | break; | |
485 | case SG_IO: { | |
486 | struct sg_io_hdr hdr; | |
487 | ||
488 | err = -EFAULT; | |
489 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
490 | break; | |
491 | err = sg_io(file, q, bd_disk, &hdr); | |
492 | if (err == -EFAULT) | |
493 | break; | |
494 | ||
495 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
496 | err = -EFAULT; | |
497 | break; | |
498 | } | |
499 | case CDROM_SEND_PACKET: { | |
500 | struct cdrom_generic_command cgc; | |
501 | struct sg_io_hdr hdr; | |
502 | ||
503 | err = -EFAULT; | |
504 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
505 | break; | |
506 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
507 | memset(&hdr, 0, sizeof(hdr)); | |
508 | hdr.interface_id = 'S'; | |
509 | hdr.cmd_len = sizeof(cgc.cmd); | |
510 | hdr.dxfer_len = cgc.buflen; | |
511 | err = 0; | |
512 | switch (cgc.data_direction) { | |
513 | case CGC_DATA_UNKNOWN: | |
514 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
515 | break; | |
516 | case CGC_DATA_WRITE: | |
517 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
518 | break; | |
519 | case CGC_DATA_READ: | |
520 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
521 | break; | |
522 | case CGC_DATA_NONE: | |
523 | hdr.dxfer_direction = SG_DXFER_NONE; | |
524 | break; | |
525 | default: | |
526 | err = -EINVAL; | |
527 | } | |
528 | if (err) | |
529 | break; | |
530 | ||
531 | hdr.dxferp = cgc.buffer; | |
532 | hdr.sbp = cgc.sense; | |
533 | if (hdr.sbp) | |
534 | hdr.mx_sb_len = sizeof(struct request_sense); | |
535 | hdr.timeout = cgc.timeout; | |
536 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; | |
537 | hdr.cmd_len = sizeof(cgc.cmd); | |
538 | ||
539 | err = sg_io(file, q, bd_disk, &hdr); | |
540 | if (err == -EFAULT) | |
541 | break; | |
542 | ||
543 | if (hdr.status) | |
544 | err = -EIO; | |
545 | ||
546 | cgc.stat = err; | |
547 | cgc.buflen = hdr.resid; | |
548 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
549 | err = -EFAULT; | |
550 | ||
551 | break; | |
552 | } | |
553 | ||
554 | /* | |
555 | * old junk scsi send command ioctl | |
556 | */ | |
557 | case SCSI_IOCTL_SEND_COMMAND: | |
558 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
559 | err = -EINVAL; | |
560 | if (!arg) | |
561 | break; | |
562 | ||
563 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
564 | break; | |
565 | case CDROMCLOSETRAY: | |
566 | close = 1; | |
567 | case CDROMEJECT: | |
568 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
569 | rq->flags |= REQ_BLOCK_PC; | |
570 | rq->data = NULL; | |
571 | rq->data_len = 0; | |
572 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
573 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
574 | rq->cmd[0] = GPCMD_START_STOP_UNIT; | |
575 | rq->cmd[4] = 0x02 + (close != 0); | |
576 | rq->cmd_len = 6; | |
577 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
578 | blk_put_request(rq); | |
579 | break; | |
580 | default: | |
581 | err = -ENOTTY; | |
582 | } | |
583 | ||
584 | blk_put_queue(q); | |
585 | return err; | |
586 | } | |
587 | ||
588 | EXPORT_SYMBOL(scsi_cmd_ioctl); |