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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. */ | |
36 | const unsigned char scsi_command_size[8] = | |
37 | { | |
38 | 6, 10, 10, 12, | |
39 | 16, 12, 10, 10 | |
40 | }; | |
41 | ||
42 | EXPORT_SYMBOL(scsi_command_size); | |
43 | ||
44 | #define BLK_DEFAULT_TIMEOUT (60 * HZ) | |
45 | ||
46 | #include <scsi/sg.h> | |
47 | ||
48 | static int sg_get_version(int __user *p) | |
49 | { | |
64100099 | 50 | static const int sg_version_num = 30527; |
1da177e4 LT |
51 | return put_user(sg_version_num, p); |
52 | } | |
53 | ||
54 | static int scsi_get_idlun(request_queue_t *q, int __user *p) | |
55 | { | |
56 | return put_user(0, p); | |
57 | } | |
58 | ||
59 | static int scsi_get_bus(request_queue_t *q, int __user *p) | |
60 | { | |
61 | return put_user(0, p); | |
62 | } | |
63 | ||
64 | static int sg_get_timeout(request_queue_t *q) | |
65 | { | |
66 | return q->sg_timeout / (HZ / USER_HZ); | |
67 | } | |
68 | ||
69 | static int sg_set_timeout(request_queue_t *q, int __user *p) | |
70 | { | |
71 | int timeout, err = get_user(timeout, p); | |
72 | ||
73 | if (!err) | |
74 | q->sg_timeout = timeout * (HZ / USER_HZ); | |
75 | ||
76 | return err; | |
77 | } | |
78 | ||
79 | static int sg_get_reserved_size(request_queue_t *q, int __user *p) | |
80 | { | |
81 | return put_user(q->sg_reserved_size, p); | |
82 | } | |
83 | ||
84 | static int sg_set_reserved_size(request_queue_t *q, int __user *p) | |
85 | { | |
86 | int size, err = get_user(size, p); | |
87 | ||
88 | if (err) | |
89 | return err; | |
90 | ||
91 | if (size < 0) | |
92 | return -EINVAL; | |
93 | if (size > (q->max_sectors << 9)) | |
94 | size = q->max_sectors << 9; | |
95 | ||
96 | q->sg_reserved_size = size; | |
97 | return 0; | |
98 | } | |
99 | ||
100 | /* | |
101 | * will always return that we are ATAPI even for a real SCSI drive, I'm not | |
102 | * so sure this is worth doing anything about (why would you care??) | |
103 | */ | |
104 | static int sg_emulated_host(request_queue_t *q, int __user *p) | |
105 | { | |
106 | return put_user(1, p); | |
107 | } | |
108 | ||
109 | #define CMD_READ_SAFE 0x01 | |
110 | #define CMD_WRITE_SAFE 0x02 | |
111 | #define CMD_WARNED 0x04 | |
112 | #define safe_for_read(cmd) [cmd] = CMD_READ_SAFE | |
113 | #define safe_for_write(cmd) [cmd] = CMD_WRITE_SAFE | |
114 | ||
115 | static int verify_command(struct file *file, unsigned char *cmd) | |
116 | { | |
117 | static unsigned char cmd_type[256] = { | |
118 | ||
119 | /* Basic read-only commands */ | |
120 | safe_for_read(TEST_UNIT_READY), | |
121 | safe_for_read(REQUEST_SENSE), | |
122 | safe_for_read(READ_6), | |
123 | safe_for_read(READ_10), | |
124 | safe_for_read(READ_12), | |
125 | safe_for_read(READ_16), | |
126 | safe_for_read(READ_BUFFER), | |
942fc2fb | 127 | safe_for_read(READ_DEFECT_DATA), |
1da177e4 LT |
128 | safe_for_read(READ_LONG), |
129 | safe_for_read(INQUIRY), | |
130 | safe_for_read(MODE_SENSE), | |
131 | safe_for_read(MODE_SENSE_10), | |
132 | safe_for_read(LOG_SENSE), | |
133 | safe_for_read(START_STOP), | |
134 | safe_for_read(GPCMD_VERIFY_10), | |
135 | safe_for_read(VERIFY_16), | |
136 | ||
137 | /* Audio CD commands */ | |
138 | safe_for_read(GPCMD_PLAY_CD), | |
139 | safe_for_read(GPCMD_PLAY_AUDIO_10), | |
140 | safe_for_read(GPCMD_PLAY_AUDIO_MSF), | |
141 | safe_for_read(GPCMD_PLAY_AUDIO_TI), | |
142 | safe_for_read(GPCMD_PAUSE_RESUME), | |
143 | ||
144 | /* CD/DVD data reading */ | |
145 | safe_for_read(GPCMD_READ_BUFFER_CAPACITY), | |
146 | safe_for_read(GPCMD_READ_CD), | |
147 | safe_for_read(GPCMD_READ_CD_MSF), | |
148 | safe_for_read(GPCMD_READ_DISC_INFO), | |
149 | safe_for_read(GPCMD_READ_CDVD_CAPACITY), | |
150 | safe_for_read(GPCMD_READ_DVD_STRUCTURE), | |
151 | safe_for_read(GPCMD_READ_HEADER), | |
152 | safe_for_read(GPCMD_READ_TRACK_RZONE_INFO), | |
153 | safe_for_read(GPCMD_READ_SUBCHANNEL), | |
154 | safe_for_read(GPCMD_READ_TOC_PMA_ATIP), | |
155 | safe_for_read(GPCMD_REPORT_KEY), | |
156 | safe_for_read(GPCMD_SCAN), | |
157 | safe_for_read(GPCMD_GET_CONFIGURATION), | |
158 | safe_for_read(GPCMD_READ_FORMAT_CAPACITIES), | |
159 | safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION), | |
160 | safe_for_read(GPCMD_GET_PERFORMANCE), | |
161 | safe_for_read(GPCMD_SEEK), | |
162 | safe_for_read(GPCMD_STOP_PLAY_SCAN), | |
163 | ||
164 | /* Basic writing commands */ | |
165 | safe_for_write(WRITE_6), | |
166 | safe_for_write(WRITE_10), | |
167 | safe_for_write(WRITE_VERIFY), | |
168 | safe_for_write(WRITE_12), | |
169 | safe_for_write(WRITE_VERIFY_12), | |
170 | safe_for_write(WRITE_16), | |
171 | safe_for_write(WRITE_LONG), | |
0faf3d3d | 172 | safe_for_write(WRITE_LONG_2), |
1da177e4 LT |
173 | safe_for_write(ERASE), |
174 | safe_for_write(GPCMD_MODE_SELECT_10), | |
175 | safe_for_write(MODE_SELECT), | |
176 | safe_for_write(LOG_SELECT), | |
177 | safe_for_write(GPCMD_BLANK), | |
178 | safe_for_write(GPCMD_CLOSE_TRACK), | |
179 | safe_for_write(GPCMD_FLUSH_CACHE), | |
180 | safe_for_write(GPCMD_FORMAT_UNIT), | |
181 | safe_for_write(GPCMD_REPAIR_RZONE_TRACK), | |
182 | safe_for_write(GPCMD_RESERVE_RZONE_TRACK), | |
183 | safe_for_write(GPCMD_SEND_DVD_STRUCTURE), | |
184 | safe_for_write(GPCMD_SEND_EVENT), | |
185 | safe_for_write(GPCMD_SEND_KEY), | |
186 | safe_for_write(GPCMD_SEND_OPC), | |
187 | safe_for_write(GPCMD_SEND_CUE_SHEET), | |
188 | safe_for_write(GPCMD_SET_SPEED), | |
189 | safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL), | |
190 | safe_for_write(GPCMD_LOAD_UNLOAD), | |
191 | safe_for_write(GPCMD_SET_STREAMING), | |
192 | }; | |
193 | unsigned char type = cmd_type[cmd[0]]; | |
5a57be8d | 194 | int has_write_perm = 0; |
1da177e4 LT |
195 | |
196 | /* Anybody who can open the device can do a read-safe command */ | |
197 | if (type & CMD_READ_SAFE) | |
198 | return 0; | |
199 | ||
5a57be8d JA |
200 | /* |
201 | * file can be NULL from ioctl_by_bdev()... | |
202 | */ | |
203 | if (file) | |
204 | has_write_perm = file->f_mode & FMODE_WRITE; | |
205 | ||
1da177e4 | 206 | /* Write-safe commands just require a writable open.. */ |
5a57be8d JA |
207 | if ((type & CMD_WRITE_SAFE) && has_write_perm) |
208 | return 0; | |
1da177e4 | 209 | |
3b0e77bd JA |
210 | /* And root can do any command.. */ |
211 | if (capable(CAP_SYS_RAWIO)) | |
212 | return 0; | |
213 | ||
1da177e4 LT |
214 | if (!type) { |
215 | cmd_type[cmd[0]] = CMD_WARNED; | |
216 | printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | /* Otherwise fail it with an "Operation not permitted" */ |
220 | return -EPERM; | |
221 | } | |
222 | ||
223 | static int sg_io(struct file *file, request_queue_t *q, | |
224 | struct gendisk *bd_disk, struct sg_io_hdr *hdr) | |
225 | { | |
c0d4d573 | 226 | unsigned long start_time, timeout; |
f63eb21b | 227 | int writing = 0, ret = 0; |
1da177e4 | 228 | struct request *rq; |
1da177e4 LT |
229 | char sense[SCSI_SENSE_BUFFERSIZE]; |
230 | unsigned char cmd[BLK_MAX_CDB]; | |
77d172ce | 231 | struct bio *bio; |
1da177e4 LT |
232 | |
233 | if (hdr->interface_id != 'S') | |
234 | return -EINVAL; | |
235 | if (hdr->cmd_len > BLK_MAX_CDB) | |
236 | return -EINVAL; | |
237 | if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len)) | |
238 | return -EFAULT; | |
239 | if (verify_command(file, cmd)) | |
240 | return -EPERM; | |
241 | ||
defd94b7 | 242 | if (hdr->dxfer_len > (q->max_hw_sectors << 9)) |
1da177e4 LT |
243 | return -EIO; |
244 | ||
f1970baf | 245 | if (hdr->dxfer_len) |
1da177e4 LT |
246 | switch (hdr->dxfer_direction) { |
247 | default: | |
248 | return -EINVAL; | |
1da177e4 LT |
249 | case SG_DXFER_TO_DEV: |
250 | writing = 1; | |
251 | break; | |
616e8a09 | 252 | case SG_DXFER_TO_FROM_DEV: |
1da177e4 | 253 | case SG_DXFER_FROM_DEV: |
1da177e4 LT |
254 | break; |
255 | } | |
256 | ||
dd1cab95 JA |
257 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); |
258 | if (!rq) | |
259 | return -ENOMEM; | |
1da177e4 | 260 | |
1da177e4 LT |
261 | /* |
262 | * fill in request structure | |
263 | */ | |
264 | rq->cmd_len = hdr->cmd_len; | |
097b8457 | 265 | memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ |
1da177e4 | 266 | memcpy(rq->cmd, cmd, hdr->cmd_len); |
1da177e4 LT |
267 | |
268 | memset(sense, 0, sizeof(sense)); | |
269 | rq->sense = sense; | |
270 | rq->sense_len = 0; | |
271 | ||
4aff5e23 | 272 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 273 | |
c0d4d573 MC |
274 | timeout = msecs_to_jiffies(hdr->timeout); |
275 | rq->timeout = (timeout < INT_MAX) ? timeout : INT_MAX; | |
1da177e4 LT |
276 | if (!rq->timeout) |
277 | rq->timeout = q->sg_timeout; | |
278 | if (!rq->timeout) | |
279 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
280 | ||
0e75f906 MC |
281 | if (hdr->iovec_count) { |
282 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
283 | struct sg_iovec *iov; | |
284 | ||
285 | iov = kmalloc(size, GFP_KERNEL); | |
286 | if (!iov) { | |
287 | ret = -ENOMEM; | |
288 | goto out; | |
289 | } | |
290 | ||
291 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
292 | kfree(iov); | |
293 | ret = -EFAULT; | |
294 | goto out; | |
295 | } | |
296 | ||
297 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count, | |
298 | hdr->dxfer_len); | |
299 | kfree(iov); | |
300 | } else if (hdr->dxfer_len) | |
301 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
302 | ||
303 | if (ret) | |
304 | goto out; | |
305 | ||
77d172ce | 306 | bio = rq->bio; |
01840f9c JA |
307 | rq->retries = 0; |
308 | ||
1da177e4 LT |
309 | start_time = jiffies; |
310 | ||
311 | /* ignore return value. All information is passed back to caller | |
312 | * (if he doesn't check that is his problem). | |
313 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
314 | */ | |
994ca9a1 | 315 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 LT |
316 | |
317 | /* write to all output members */ | |
318 | hdr->status = 0xff & rq->errors; | |
319 | hdr->masked_status = status_byte(rq->errors); | |
320 | hdr->msg_status = msg_byte(rq->errors); | |
321 | hdr->host_status = host_byte(rq->errors); | |
322 | hdr->driver_status = driver_byte(rq->errors); | |
323 | hdr->info = 0; | |
324 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
325 | hdr->info |= SG_INFO_CHECK; | |
326 | hdr->resid = rq->data_len; | |
327 | hdr->duration = ((jiffies - start_time) * 1000) / HZ; | |
328 | hdr->sb_len_wr = 0; | |
329 | ||
330 | if (rq->sense_len && hdr->sbp) { | |
331 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
332 | ||
333 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
334 | hdr->sb_len_wr = len; | |
335 | } | |
336 | ||
8e5cfc45 | 337 | if (blk_rq_unmap_user(bio)) |
dd1cab95 | 338 | ret = -EFAULT; |
1da177e4 LT |
339 | |
340 | /* may not have succeeded, but output values written to control | |
341 | * structure (struct sg_io_hdr). */ | |
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; | |
385 | int err; | |
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) { | |
406 | buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); | |
407 | if (!buffer) | |
408 | return -ENOMEM; | |
409 | ||
410 | memset(buffer, 0, bytes); | |
411 | } | |
412 | ||
413 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
414 | ||
415 | cmdlen = COMMAND_SIZE(opcode); | |
416 | ||
417 | /* | |
418 | * get command and data to send to device, if any | |
419 | */ | |
420 | err = -EFAULT; | |
421 | rq->cmd_len = cmdlen; | |
422 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
423 | goto error; | |
424 | ||
21b2f0c8 | 425 | if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len)) |
1da177e4 LT |
426 | goto error; |
427 | ||
428 | err = verify_command(file, rq->cmd); | |
429 | if (err) | |
430 | goto error; | |
431 | ||
21b2f0c8 CH |
432 | /* default. possible overriden later */ |
433 | rq->retries = 5; | |
434 | ||
1da177e4 | 435 | switch (opcode) { |
21b2f0c8 CH |
436 | case SEND_DIAGNOSTIC: |
437 | case FORMAT_UNIT: | |
438 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
439 | rq->retries = 1; | |
440 | break; | |
441 | case START_STOP: | |
442 | rq->timeout = START_STOP_TIMEOUT; | |
443 | break; | |
444 | case MOVE_MEDIUM: | |
445 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
446 | break; | |
447 | case READ_ELEMENT_STATUS: | |
448 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
449 | break; | |
450 | case READ_DEFECT_DATA: | |
451 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
452 | rq->retries = 1; | |
453 | break; | |
454 | default: | |
455 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
456 | break; | |
457 | } | |
458 | ||
459 | if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) { | |
460 | err = DRIVER_ERROR << 24; | |
461 | goto out; | |
1da177e4 LT |
462 | } |
463 | ||
464 | memset(sense, 0, sizeof(sense)); | |
465 | rq->sense = sense; | |
466 | rq->sense_len = 0; | |
4aff5e23 | 467 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 468 | |
21b2f0c8 CH |
469 | blk_execute_rq(q, disk, rq, 0); |
470 | ||
471 | out: | |
1da177e4 LT |
472 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
473 | if (err) { | |
474 | if (rq->sense_len && rq->sense) { | |
475 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
476 | rq->sense_len : OMAX_SB_LEN; | |
477 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
478 | err = -EFAULT; | |
479 | } | |
480 | } else { | |
481 | if (copy_to_user(sic->data, buffer, out_len)) | |
482 | err = -EFAULT; | |
483 | } | |
484 | ||
485 | error: | |
486 | kfree(buffer); | |
487 | blk_put_request(rq); | |
488 | return err; | |
489 | } | |
21b2f0c8 | 490 | EXPORT_SYMBOL_GPL(sg_scsi_ioctl); |
f98d2dfd BC |
491 | |
492 | /* Send basic block requests */ | |
493 | static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data) | |
494 | { | |
495 | struct request *rq; | |
496 | int err; | |
497 | ||
498 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
4aff5e23 | 499 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
f98d2dfd BC |
500 | rq->data = NULL; |
501 | rq->data_len = 0; | |
502 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
503 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
504 | rq->cmd[0] = cmd; | |
505 | rq->cmd[4] = data; | |
506 | rq->cmd_len = 6; | |
507 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
508 | blk_put_request(rq); | |
509 | ||
510 | return err; | |
511 | } | |
512 | ||
513 | static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data) | |
514 | { | |
515 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
516 | } | |
517 | ||
1da177e4 LT |
518 | int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg) |
519 | { | |
520 | request_queue_t *q; | |
f98d2dfd | 521 | int err; |
1da177e4 LT |
522 | |
523 | q = bd_disk->queue; | |
524 | if (!q) | |
525 | return -ENXIO; | |
526 | ||
527 | if (blk_get_queue(q)) | |
528 | return -ENXIO; | |
529 | ||
530 | switch (cmd) { | |
531 | /* | |
532 | * new sgv3 interface | |
533 | */ | |
534 | case SG_GET_VERSION_NUM: | |
535 | err = sg_get_version(arg); | |
536 | break; | |
537 | case SCSI_IOCTL_GET_IDLUN: | |
538 | err = scsi_get_idlun(q, arg); | |
539 | break; | |
540 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
541 | err = scsi_get_bus(q, arg); | |
542 | break; | |
543 | case SG_SET_TIMEOUT: | |
544 | err = sg_set_timeout(q, arg); | |
545 | break; | |
546 | case SG_GET_TIMEOUT: | |
547 | err = sg_get_timeout(q); | |
548 | break; | |
549 | case SG_GET_RESERVED_SIZE: | |
550 | err = sg_get_reserved_size(q, arg); | |
551 | break; | |
552 | case SG_SET_RESERVED_SIZE: | |
553 | err = sg_set_reserved_size(q, arg); | |
554 | break; | |
555 | case SG_EMULATED_HOST: | |
556 | err = sg_emulated_host(q, arg); | |
557 | break; | |
558 | case SG_IO: { | |
559 | struct sg_io_hdr hdr; | |
560 | ||
561 | err = -EFAULT; | |
562 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
563 | break; | |
564 | err = sg_io(file, q, bd_disk, &hdr); | |
565 | if (err == -EFAULT) | |
566 | break; | |
567 | ||
568 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
569 | err = -EFAULT; | |
570 | break; | |
571 | } | |
572 | case CDROM_SEND_PACKET: { | |
573 | struct cdrom_generic_command cgc; | |
574 | struct sg_io_hdr hdr; | |
575 | ||
576 | err = -EFAULT; | |
577 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
578 | break; | |
579 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
580 | memset(&hdr, 0, sizeof(hdr)); | |
581 | hdr.interface_id = 'S'; | |
582 | hdr.cmd_len = sizeof(cgc.cmd); | |
583 | hdr.dxfer_len = cgc.buflen; | |
584 | err = 0; | |
585 | switch (cgc.data_direction) { | |
586 | case CGC_DATA_UNKNOWN: | |
587 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
588 | break; | |
589 | case CGC_DATA_WRITE: | |
590 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
591 | break; | |
592 | case CGC_DATA_READ: | |
593 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
594 | break; | |
595 | case CGC_DATA_NONE: | |
596 | hdr.dxfer_direction = SG_DXFER_NONE; | |
597 | break; | |
598 | default: | |
599 | err = -EINVAL; | |
600 | } | |
601 | if (err) | |
602 | break; | |
603 | ||
604 | hdr.dxferp = cgc.buffer; | |
605 | hdr.sbp = cgc.sense; | |
606 | if (hdr.sbp) | |
607 | hdr.mx_sb_len = sizeof(struct request_sense); | |
608 | hdr.timeout = cgc.timeout; | |
609 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; | |
610 | hdr.cmd_len = sizeof(cgc.cmd); | |
611 | ||
612 | err = sg_io(file, q, bd_disk, &hdr); | |
613 | if (err == -EFAULT) | |
614 | break; | |
615 | ||
616 | if (hdr.status) | |
617 | err = -EIO; | |
618 | ||
619 | cgc.stat = err; | |
620 | cgc.buflen = hdr.resid; | |
621 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
622 | err = -EFAULT; | |
623 | ||
624 | break; | |
625 | } | |
626 | ||
627 | /* | |
628 | * old junk scsi send command ioctl | |
629 | */ | |
630 | case SCSI_IOCTL_SEND_COMMAND: | |
631 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
632 | err = -EINVAL; | |
633 | if (!arg) | |
634 | break; | |
635 | ||
636 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
637 | break; | |
638 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
639 | err = blk_send_start_stop(q, bd_disk, 0x03); |
640 | break; | |
1da177e4 | 641 | case CDROMEJECT: |
f98d2dfd | 642 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
643 | break; |
644 | default: | |
645 | err = -ENOTTY; | |
646 | } | |
647 | ||
648 | blk_put_queue(q); | |
649 | return err; | |
650 | } | |
651 | ||
652 | EXPORT_SYMBOL(scsi_cmd_ioctl); |