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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 | { | |
226 | unsigned long start_time; | |
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]; | |
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; | |
1da177e4 LT |
248 | case SG_DXFER_TO_DEV: |
249 | writing = 1; | |
250 | break; | |
616e8a09 | 251 | case SG_DXFER_TO_FROM_DEV: |
1da177e4 | 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 | |
1da177e4 LT |
260 | /* |
261 | * fill in request structure | |
262 | */ | |
263 | rq->cmd_len = hdr->cmd_len; | |
097b8457 | 264 | memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ |
1da177e4 | 265 | memcpy(rq->cmd, cmd, hdr->cmd_len); |
1da177e4 LT |
266 | |
267 | memset(sense, 0, sizeof(sense)); | |
268 | rq->sense = sense; | |
269 | rq->sense_len = 0; | |
270 | ||
4aff5e23 | 271 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 LT |
272 | |
273 | /* | |
274 | * bounce this after holding a reference to the original bio, it's | |
275 | * needed for proper unmapping | |
276 | */ | |
277 | if (rq->bio) | |
278 | blk_queue_bounce(q, &rq->bio); | |
279 | ||
280 | rq->timeout = (hdr->timeout * HZ) / 1000; | |
281 | if (!rq->timeout) | |
282 | rq->timeout = q->sg_timeout; | |
283 | if (!rq->timeout) | |
284 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
285 | ||
0e75f906 MC |
286 | if (hdr->iovec_count) { |
287 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
288 | struct sg_iovec *iov; | |
289 | ||
290 | iov = kmalloc(size, GFP_KERNEL); | |
291 | if (!iov) { | |
292 | ret = -ENOMEM; | |
293 | goto out; | |
294 | } | |
295 | ||
296 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
297 | kfree(iov); | |
298 | ret = -EFAULT; | |
299 | goto out; | |
300 | } | |
301 | ||
302 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count, | |
303 | hdr->dxfer_len); | |
304 | kfree(iov); | |
305 | } else if (hdr->dxfer_len) | |
306 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
307 | ||
308 | if (ret) | |
309 | goto out; | |
310 | ||
01840f9c JA |
311 | rq->retries = 0; |
312 | ||
1da177e4 LT |
313 | start_time = jiffies; |
314 | ||
315 | /* ignore return value. All information is passed back to caller | |
316 | * (if he doesn't check that is his problem). | |
317 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
318 | */ | |
994ca9a1 | 319 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 LT |
320 | |
321 | /* write to all output members */ | |
322 | hdr->status = 0xff & rq->errors; | |
323 | hdr->masked_status = status_byte(rq->errors); | |
324 | hdr->msg_status = msg_byte(rq->errors); | |
325 | hdr->host_status = host_byte(rq->errors); | |
326 | hdr->driver_status = driver_byte(rq->errors); | |
327 | hdr->info = 0; | |
328 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
329 | hdr->info |= SG_INFO_CHECK; | |
330 | hdr->resid = rq->data_len; | |
331 | hdr->duration = ((jiffies - start_time) * 1000) / HZ; | |
332 | hdr->sb_len_wr = 0; | |
333 | ||
334 | if (rq->sense_len && hdr->sbp) { | |
335 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
336 | ||
337 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
338 | hdr->sb_len_wr = len; | |
339 | } | |
340 | ||
0e75f906 | 341 | if (blk_rq_unmap_user(rq)) |
dd1cab95 | 342 | ret = -EFAULT; |
1da177e4 LT |
343 | |
344 | /* may not have succeeded, but output values written to control | |
345 | * structure (struct sg_io_hdr). */ | |
dd1cab95 JA |
346 | out: |
347 | blk_put_request(rq); | |
348 | return ret; | |
1da177e4 LT |
349 | } |
350 | ||
21b2f0c8 CH |
351 | /** |
352 | * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl | |
353 | * @file: file this ioctl operates on (optional) | |
354 | * @q: request queue to send scsi commands down | |
355 | * @disk: gendisk to operate on (option) | |
356 | * @sic: userspace structure describing the command to perform | |
357 | * | |
358 | * Send down the scsi command described by @sic to the device below | |
359 | * the request queue @q. If @file is non-NULL it's used to perform | |
360 | * fine-grained permission checks that allow users to send down | |
361 | * non-destructive SCSI commands. If the caller has a struct gendisk | |
362 | * available it should be passed in as @disk to allow the low level | |
363 | * driver to use the information contained in it. A non-NULL @disk | |
364 | * is only allowed if the caller knows that the low level driver doesn't | |
365 | * need it (e.g. in the scsi subsystem). | |
366 | * | |
367 | * Notes: | |
368 | * - This interface is deprecated - users should use the SG_IO | |
369 | * interface instead, as this is a more flexible approach to | |
370 | * performing SCSI commands on a device. | |
371 | * - The SCSI command length is determined by examining the 1st byte | |
372 | * of the given command. There is no way to override this. | |
373 | * - Data transfers are limited to PAGE_SIZE | |
374 | * - The length (x + y) must be at least OMAX_SB_LEN bytes long to | |
375 | * accommodate the sense buffer when an error occurs. | |
376 | * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that | |
377 | * old code will not be surprised. | |
378 | * - If a Unix error occurs (e.g. ENOMEM) then the user will receive | |
379 | * a negative return and the Unix error code in 'errno'. | |
380 | * If the SCSI command succeeds then 0 is returned. | |
381 | * Positive numbers returned are the compacted SCSI error codes (4 | |
382 | * bytes in one int) where the lowest byte is the SCSI status. | |
383 | */ | |
1da177e4 | 384 | #define OMAX_SB_LEN 16 /* For backward compatibility */ |
21b2f0c8 CH |
385 | int sg_scsi_ioctl(struct file *file, struct request_queue *q, |
386 | struct gendisk *disk, struct scsi_ioctl_command __user *sic) | |
1da177e4 LT |
387 | { |
388 | struct request *rq; | |
389 | int err; | |
390 | unsigned int in_len, out_len, bytes, opcode, cmdlen; | |
391 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
392 | ||
21b2f0c8 CH |
393 | if (!sic) |
394 | return -EINVAL; | |
395 | ||
1da177e4 LT |
396 | /* |
397 | * get in an out lengths, verify they don't exceed a page worth of data | |
398 | */ | |
399 | if (get_user(in_len, &sic->inlen)) | |
400 | return -EFAULT; | |
401 | if (get_user(out_len, &sic->outlen)) | |
402 | return -EFAULT; | |
403 | if (in_len > PAGE_SIZE || out_len > PAGE_SIZE) | |
404 | return -EINVAL; | |
405 | if (get_user(opcode, sic->data)) | |
406 | return -EFAULT; | |
407 | ||
408 | bytes = max(in_len, out_len); | |
409 | if (bytes) { | |
410 | buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); | |
411 | if (!buffer) | |
412 | return -ENOMEM; | |
413 | ||
414 | memset(buffer, 0, bytes); | |
415 | } | |
416 | ||
417 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
418 | ||
419 | cmdlen = COMMAND_SIZE(opcode); | |
420 | ||
421 | /* | |
422 | * get command and data to send to device, if any | |
423 | */ | |
424 | err = -EFAULT; | |
425 | rq->cmd_len = cmdlen; | |
426 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
427 | goto error; | |
428 | ||
21b2f0c8 | 429 | if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len)) |
1da177e4 LT |
430 | goto error; |
431 | ||
432 | err = verify_command(file, rq->cmd); | |
433 | if (err) | |
434 | goto error; | |
435 | ||
21b2f0c8 CH |
436 | /* default. possible overriden later */ |
437 | rq->retries = 5; | |
438 | ||
1da177e4 | 439 | switch (opcode) { |
21b2f0c8 CH |
440 | case SEND_DIAGNOSTIC: |
441 | case FORMAT_UNIT: | |
442 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
443 | rq->retries = 1; | |
444 | break; | |
445 | case START_STOP: | |
446 | rq->timeout = START_STOP_TIMEOUT; | |
447 | break; | |
448 | case MOVE_MEDIUM: | |
449 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
450 | break; | |
451 | case READ_ELEMENT_STATUS: | |
452 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
453 | break; | |
454 | case READ_DEFECT_DATA: | |
455 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
456 | rq->retries = 1; | |
457 | break; | |
458 | default: | |
459 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
460 | break; | |
461 | } | |
462 | ||
463 | if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) { | |
464 | err = DRIVER_ERROR << 24; | |
465 | goto out; | |
1da177e4 LT |
466 | } |
467 | ||
468 | memset(sense, 0, sizeof(sense)); | |
469 | rq->sense = sense; | |
470 | rq->sense_len = 0; | |
4aff5e23 | 471 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 472 | |
21b2f0c8 CH |
473 | blk_execute_rq(q, disk, rq, 0); |
474 | ||
475 | out: | |
1da177e4 LT |
476 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
477 | if (err) { | |
478 | if (rq->sense_len && rq->sense) { | |
479 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
480 | rq->sense_len : OMAX_SB_LEN; | |
481 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
482 | err = -EFAULT; | |
483 | } | |
484 | } else { | |
485 | if (copy_to_user(sic->data, buffer, out_len)) | |
486 | err = -EFAULT; | |
487 | } | |
488 | ||
489 | error: | |
490 | kfree(buffer); | |
491 | blk_put_request(rq); | |
492 | return err; | |
493 | } | |
21b2f0c8 | 494 | EXPORT_SYMBOL_GPL(sg_scsi_ioctl); |
f98d2dfd BC |
495 | |
496 | /* Send basic block requests */ | |
497 | static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data) | |
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; | |
506 | rq->timeout = BLK_DEFAULT_TIMEOUT; | |
507 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
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 | ||
517 | static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data) | |
518 | { | |
519 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
520 | } | |
521 | ||
1da177e4 LT |
522 | int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg) |
523 | { | |
524 | request_queue_t *q; | |
f98d2dfd | 525 | int err; |
1da177e4 LT |
526 | |
527 | q = bd_disk->queue; | |
528 | if (!q) | |
529 | return -ENXIO; | |
530 | ||
531 | if (blk_get_queue(q)) | |
532 | return -ENXIO; | |
533 | ||
534 | switch (cmd) { | |
535 | /* | |
536 | * new sgv3 interface | |
537 | */ | |
538 | case SG_GET_VERSION_NUM: | |
539 | err = sg_get_version(arg); | |
540 | break; | |
541 | case SCSI_IOCTL_GET_IDLUN: | |
542 | err = scsi_get_idlun(q, arg); | |
543 | break; | |
544 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
545 | err = scsi_get_bus(q, arg); | |
546 | break; | |
547 | case SG_SET_TIMEOUT: | |
548 | err = sg_set_timeout(q, arg); | |
549 | break; | |
550 | case SG_GET_TIMEOUT: | |
551 | err = sg_get_timeout(q); | |
552 | break; | |
553 | case SG_GET_RESERVED_SIZE: | |
554 | err = sg_get_reserved_size(q, arg); | |
555 | break; | |
556 | case SG_SET_RESERVED_SIZE: | |
557 | err = sg_set_reserved_size(q, arg); | |
558 | break; | |
559 | case SG_EMULATED_HOST: | |
560 | err = sg_emulated_host(q, arg); | |
561 | break; | |
562 | case SG_IO: { | |
563 | struct sg_io_hdr hdr; | |
564 | ||
565 | err = -EFAULT; | |
566 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
567 | break; | |
568 | err = sg_io(file, q, bd_disk, &hdr); | |
569 | if (err == -EFAULT) | |
570 | break; | |
571 | ||
572 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
573 | err = -EFAULT; | |
574 | break; | |
575 | } | |
576 | case CDROM_SEND_PACKET: { | |
577 | struct cdrom_generic_command cgc; | |
578 | struct sg_io_hdr hdr; | |
579 | ||
580 | err = -EFAULT; | |
581 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
582 | break; | |
583 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
584 | memset(&hdr, 0, sizeof(hdr)); | |
585 | hdr.interface_id = 'S'; | |
586 | hdr.cmd_len = sizeof(cgc.cmd); | |
587 | hdr.dxfer_len = cgc.buflen; | |
588 | err = 0; | |
589 | switch (cgc.data_direction) { | |
590 | case CGC_DATA_UNKNOWN: | |
591 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
592 | break; | |
593 | case CGC_DATA_WRITE: | |
594 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
595 | break; | |
596 | case CGC_DATA_READ: | |
597 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
598 | break; | |
599 | case CGC_DATA_NONE: | |
600 | hdr.dxfer_direction = SG_DXFER_NONE; | |
601 | break; | |
602 | default: | |
603 | err = -EINVAL; | |
604 | } | |
605 | if (err) | |
606 | break; | |
607 | ||
608 | hdr.dxferp = cgc.buffer; | |
609 | hdr.sbp = cgc.sense; | |
610 | if (hdr.sbp) | |
611 | hdr.mx_sb_len = sizeof(struct request_sense); | |
612 | hdr.timeout = cgc.timeout; | |
613 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; | |
614 | hdr.cmd_len = sizeof(cgc.cmd); | |
615 | ||
616 | err = sg_io(file, q, bd_disk, &hdr); | |
617 | if (err == -EFAULT) | |
618 | break; | |
619 | ||
620 | if (hdr.status) | |
621 | err = -EIO; | |
622 | ||
623 | cgc.stat = err; | |
624 | cgc.buflen = hdr.resid; | |
625 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
626 | err = -EFAULT; | |
627 | ||
628 | break; | |
629 | } | |
630 | ||
631 | /* | |
632 | * old junk scsi send command ioctl | |
633 | */ | |
634 | case SCSI_IOCTL_SEND_COMMAND: | |
635 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
636 | err = -EINVAL; | |
637 | if (!arg) | |
638 | break; | |
639 | ||
640 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
641 | break; | |
642 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
643 | err = blk_send_start_stop(q, bd_disk, 0x03); |
644 | break; | |
1da177e4 | 645 | case CDROMEJECT: |
f98d2dfd | 646 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
647 | break; |
648 | default: | |
649 | err = -ENOTTY; | |
650 | } | |
651 | ||
652 | blk_put_queue(q); | |
653 | return err; | |
654 | } | |
655 | ||
656 | EXPORT_SYMBOL(scsi_cmd_ioctl); |