Commit | Line | Data |
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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. */ | |
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 LT |
62 | { |
63 | return q->sg_timeout / (HZ / USER_HZ); | |
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) | |
71 | q->sg_timeout = timeout * (HZ / USER_HZ); | |
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 | ||
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 | ||
337ad41d | 114 | int blk_verify_command(unsigned char *cmd, int has_write_perm) |
1da177e4 LT |
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]]; | |
193 | ||
194 | /* Anybody who can open the device can do a read-safe command */ | |
195 | if (type & CMD_READ_SAFE) | |
196 | return 0; | |
197 | ||
198 | /* Write-safe commands just require a writable open.. */ | |
5a57be8d JA |
199 | if ((type & CMD_WRITE_SAFE) && has_write_perm) |
200 | return 0; | |
1da177e4 | 201 | |
3b0e77bd JA |
202 | /* And root can do any command.. */ |
203 | if (capable(CAP_SYS_RAWIO)) | |
204 | return 0; | |
205 | ||
1da177e4 LT |
206 | if (!type) { |
207 | cmd_type[cmd[0]] = CMD_WARNED; | |
208 | printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]); | |
209 | } | |
210 | ||
1da177e4 LT |
211 | /* Otherwise fail it with an "Operation not permitted" */ |
212 | return -EPERM; | |
213 | } | |
337ad41d | 214 | EXPORT_SYMBOL_GPL(blk_verify_command); |
1da177e4 | 215 | |
165125e1 | 216 | static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq, |
41e1703b | 217 | struct sg_io_hdr *hdr, int has_write_perm) |
3d6392cf JA |
218 | { |
219 | memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ | |
220 | ||
221 | if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len)) | |
222 | return -EFAULT; | |
337ad41d | 223 | if (blk_verify_command(rq->cmd, has_write_perm)) |
3d6392cf JA |
224 | return -EPERM; |
225 | ||
226 | /* | |
227 | * fill in request structure | |
228 | */ | |
229 | rq->cmd_len = hdr->cmd_len; | |
230 | rq->cmd_type = REQ_TYPE_BLOCK_PC; | |
231 | ||
24bb8fb9 | 232 | rq->timeout = msecs_to_jiffies(hdr->timeout); |
3d6392cf JA |
233 | if (!rq->timeout) |
234 | rq->timeout = q->sg_timeout; | |
235 | if (!rq->timeout) | |
236 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; | |
237 | ||
238 | return 0; | |
239 | } | |
3d6392cf JA |
240 | |
241 | /* | |
242 | * unmap a request that was previously mapped to this sg_io_hdr. handles | |
243 | * both sg and non-sg sg_io_hdr. | |
244 | */ | |
41e1703b | 245 | static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr) |
3d6392cf | 246 | { |
ac6b91b8 | 247 | blk_rq_unmap_user(rq->bio); |
3d6392cf JA |
248 | blk_put_request(rq); |
249 | return 0; | |
250 | } | |
3d6392cf | 251 | |
41e1703b FT |
252 | static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, |
253 | struct bio *bio) | |
3d6392cf JA |
254 | { |
255 | int r, ret = 0; | |
256 | ||
257 | /* | |
258 | * fill in all the output members | |
259 | */ | |
260 | hdr->status = rq->errors & 0xff; | |
261 | hdr->masked_status = status_byte(rq->errors); | |
262 | hdr->msg_status = msg_byte(rq->errors); | |
263 | hdr->host_status = host_byte(rq->errors); | |
264 | hdr->driver_status = driver_byte(rq->errors); | |
265 | hdr->info = 0; | |
266 | if (hdr->masked_status || hdr->host_status || hdr->driver_status) | |
267 | hdr->info |= SG_INFO_CHECK; | |
7a85f889 | 268 | hdr->resid = rq->data_len; |
3d6392cf JA |
269 | hdr->sb_len_wr = 0; |
270 | ||
271 | if (rq->sense_len && hdr->sbp) { | |
272 | int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len); | |
273 | ||
274 | if (!copy_to_user(hdr->sbp, rq->sense, len)) | |
275 | hdr->sb_len_wr = len; | |
276 | else | |
277 | ret = -EFAULT; | |
278 | } | |
279 | ||
280 | rq->bio = bio; | |
281 | r = blk_unmap_sghdr_rq(rq, hdr); | |
282 | if (ret) | |
283 | r = ret; | |
284 | ||
285 | return r; | |
286 | } | |
3d6392cf | 287 | |
165125e1 | 288 | static int sg_io(struct file *file, struct request_queue *q, |
1da177e4 LT |
289 | struct gendisk *bd_disk, struct sg_io_hdr *hdr) |
290 | { | |
3d6392cf JA |
291 | unsigned long start_time; |
292 | int writing = 0, ret = 0, has_write_perm = 0; | |
1da177e4 | 293 | struct request *rq; |
1da177e4 | 294 | char sense[SCSI_SENSE_BUFFERSIZE]; |
77d172ce | 295 | struct bio *bio; |
1da177e4 LT |
296 | |
297 | if (hdr->interface_id != 'S') | |
298 | return -EINVAL; | |
299 | if (hdr->cmd_len > BLK_MAX_CDB) | |
300 | return -EINVAL; | |
1da177e4 | 301 | |
defd94b7 | 302 | if (hdr->dxfer_len > (q->max_hw_sectors << 9)) |
1da177e4 LT |
303 | return -EIO; |
304 | ||
f1970baf | 305 | if (hdr->dxfer_len) |
1da177e4 LT |
306 | switch (hdr->dxfer_direction) { |
307 | default: | |
308 | return -EINVAL; | |
1da177e4 LT |
309 | case SG_DXFER_TO_DEV: |
310 | writing = 1; | |
311 | break; | |
616e8a09 | 312 | case SG_DXFER_TO_FROM_DEV: |
1da177e4 | 313 | case SG_DXFER_FROM_DEV: |
1da177e4 LT |
314 | break; |
315 | } | |
316 | ||
dd1cab95 JA |
317 | rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL); |
318 | if (!rq) | |
319 | return -ENOMEM; | |
1da177e4 | 320 | |
3d6392cf JA |
321 | if (file) |
322 | has_write_perm = file->f_mode & FMODE_WRITE; | |
1da177e4 | 323 | |
3d6392cf | 324 | if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) { |
3d6392cf JA |
325 | blk_put_request(rq); |
326 | return -EFAULT; | |
327 | } | |
1da177e4 | 328 | |
0e75f906 MC |
329 | if (hdr->iovec_count) { |
330 | const int size = sizeof(struct sg_iovec) * hdr->iovec_count; | |
331 | struct sg_iovec *iov; | |
332 | ||
333 | iov = kmalloc(size, GFP_KERNEL); | |
334 | if (!iov) { | |
335 | ret = -ENOMEM; | |
336 | goto out; | |
337 | } | |
338 | ||
339 | if (copy_from_user(iov, hdr->dxferp, size)) { | |
340 | kfree(iov); | |
341 | ret = -EFAULT; | |
342 | goto out; | |
343 | } | |
344 | ||
345 | ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count, | |
346 | hdr->dxfer_len); | |
347 | kfree(iov); | |
348 | } else if (hdr->dxfer_len) | |
349 | ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len); | |
350 | ||
351 | if (ret) | |
352 | goto out; | |
353 | ||
77d172ce | 354 | bio = rq->bio; |
3d6392cf JA |
355 | memset(sense, 0, sizeof(sense)); |
356 | rq->sense = sense; | |
357 | rq->sense_len = 0; | |
01840f9c JA |
358 | rq->retries = 0; |
359 | ||
1da177e4 LT |
360 | start_time = jiffies; |
361 | ||
362 | /* ignore return value. All information is passed back to caller | |
363 | * (if he doesn't check that is his problem). | |
364 | * N.B. a non-zero SCSI status is _not_ necessarily an error. | |
365 | */ | |
994ca9a1 | 366 | blk_execute_rq(q, bd_disk, rq, 0); |
1da177e4 | 367 | |
24bb8fb9 | 368 | hdr->duration = jiffies_to_msecs(jiffies - start_time); |
1da177e4 | 369 | |
3d6392cf | 370 | return blk_complete_sghdr_rq(rq, hdr, bio); |
dd1cab95 JA |
371 | out: |
372 | blk_put_request(rq); | |
373 | return ret; | |
1da177e4 LT |
374 | } |
375 | ||
21b2f0c8 CH |
376 | /** |
377 | * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl | |
378 | * @file: file this ioctl operates on (optional) | |
379 | * @q: request queue to send scsi commands down | |
380 | * @disk: gendisk to operate on (option) | |
381 | * @sic: userspace structure describing the command to perform | |
382 | * | |
383 | * Send down the scsi command described by @sic to the device below | |
384 | * the request queue @q. If @file is non-NULL it's used to perform | |
385 | * fine-grained permission checks that allow users to send down | |
386 | * non-destructive SCSI commands. If the caller has a struct gendisk | |
387 | * available it should be passed in as @disk to allow the low level | |
388 | * driver to use the information contained in it. A non-NULL @disk | |
389 | * is only allowed if the caller knows that the low level driver doesn't | |
390 | * need it (e.g. in the scsi subsystem). | |
391 | * | |
392 | * Notes: | |
393 | * - This interface is deprecated - users should use the SG_IO | |
394 | * interface instead, as this is a more flexible approach to | |
395 | * performing SCSI commands on a device. | |
396 | * - The SCSI command length is determined by examining the 1st byte | |
397 | * of the given command. There is no way to override this. | |
398 | * - Data transfers are limited to PAGE_SIZE | |
399 | * - The length (x + y) must be at least OMAX_SB_LEN bytes long to | |
400 | * accommodate the sense buffer when an error occurs. | |
401 | * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that | |
402 | * old code will not be surprised. | |
403 | * - If a Unix error occurs (e.g. ENOMEM) then the user will receive | |
404 | * a negative return and the Unix error code in 'errno'. | |
405 | * If the SCSI command succeeds then 0 is returned. | |
406 | * Positive numbers returned are the compacted SCSI error codes (4 | |
407 | * bytes in one int) where the lowest byte is the SCSI status. | |
408 | */ | |
1da177e4 | 409 | #define OMAX_SB_LEN 16 /* For backward compatibility */ |
21b2f0c8 CH |
410 | int sg_scsi_ioctl(struct file *file, struct request_queue *q, |
411 | struct gendisk *disk, struct scsi_ioctl_command __user *sic) | |
1da177e4 LT |
412 | { |
413 | struct request *rq; | |
414 | int err; | |
415 | unsigned int in_len, out_len, bytes, opcode, cmdlen; | |
416 | char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; | |
417 | ||
21b2f0c8 CH |
418 | if (!sic) |
419 | return -EINVAL; | |
420 | ||
1da177e4 LT |
421 | /* |
422 | * get in an out lengths, verify they don't exceed a page worth of data | |
423 | */ | |
424 | if (get_user(in_len, &sic->inlen)) | |
425 | return -EFAULT; | |
426 | if (get_user(out_len, &sic->outlen)) | |
427 | return -EFAULT; | |
428 | if (in_len > PAGE_SIZE || out_len > PAGE_SIZE) | |
429 | return -EINVAL; | |
430 | if (get_user(opcode, sic->data)) | |
431 | return -EFAULT; | |
432 | ||
433 | bytes = max(in_len, out_len); | |
434 | if (bytes) { | |
dd00cc48 | 435 | buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN); |
1da177e4 LT |
436 | if (!buffer) |
437 | return -ENOMEM; | |
438 | ||
1da177e4 LT |
439 | } |
440 | ||
441 | rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT); | |
442 | ||
443 | cmdlen = COMMAND_SIZE(opcode); | |
444 | ||
445 | /* | |
446 | * get command and data to send to device, if any | |
447 | */ | |
448 | err = -EFAULT; | |
449 | rq->cmd_len = cmdlen; | |
450 | if (copy_from_user(rq->cmd, sic->data, cmdlen)) | |
451 | goto error; | |
452 | ||
21b2f0c8 | 453 | if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len)) |
1da177e4 LT |
454 | goto error; |
455 | ||
337ad41d | 456 | err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE); |
1da177e4 LT |
457 | if (err) |
458 | goto error; | |
459 | ||
21b2f0c8 CH |
460 | /* default. possible overriden later */ |
461 | rq->retries = 5; | |
462 | ||
1da177e4 | 463 | switch (opcode) { |
21b2f0c8 CH |
464 | case SEND_DIAGNOSTIC: |
465 | case FORMAT_UNIT: | |
466 | rq->timeout = FORMAT_UNIT_TIMEOUT; | |
467 | rq->retries = 1; | |
468 | break; | |
469 | case START_STOP: | |
470 | rq->timeout = START_STOP_TIMEOUT; | |
471 | break; | |
472 | case MOVE_MEDIUM: | |
473 | rq->timeout = MOVE_MEDIUM_TIMEOUT; | |
474 | break; | |
475 | case READ_ELEMENT_STATUS: | |
476 | rq->timeout = READ_ELEMENT_STATUS_TIMEOUT; | |
477 | break; | |
478 | case READ_DEFECT_DATA: | |
479 | rq->timeout = READ_DEFECT_DATA_TIMEOUT; | |
480 | rq->retries = 1; | |
481 | break; | |
482 | default: | |
3d6392cf | 483 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
21b2f0c8 CH |
484 | break; |
485 | } | |
486 | ||
487 | if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, __GFP_WAIT)) { | |
488 | err = DRIVER_ERROR << 24; | |
489 | goto out; | |
1da177e4 LT |
490 | } |
491 | ||
492 | memset(sense, 0, sizeof(sense)); | |
493 | rq->sense = sense; | |
494 | rq->sense_len = 0; | |
4aff5e23 | 495 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
1da177e4 | 496 | |
21b2f0c8 CH |
497 | blk_execute_rq(q, disk, rq, 0); |
498 | ||
499 | out: | |
1da177e4 LT |
500 | err = rq->errors & 0xff; /* only 8 bit SCSI status */ |
501 | if (err) { | |
502 | if (rq->sense_len && rq->sense) { | |
503 | bytes = (OMAX_SB_LEN > rq->sense_len) ? | |
504 | rq->sense_len : OMAX_SB_LEN; | |
505 | if (copy_to_user(sic->data, rq->sense, bytes)) | |
506 | err = -EFAULT; | |
507 | } | |
508 | } else { | |
509 | if (copy_to_user(sic->data, buffer, out_len)) | |
510 | err = -EFAULT; | |
511 | } | |
512 | ||
513 | error: | |
514 | kfree(buffer); | |
515 | blk_put_request(rq); | |
516 | return err; | |
517 | } | |
21b2f0c8 | 518 | EXPORT_SYMBOL_GPL(sg_scsi_ioctl); |
f98d2dfd BC |
519 | |
520 | /* Send basic block requests */ | |
165125e1 JA |
521 | static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk, |
522 | int cmd, int data) | |
f98d2dfd BC |
523 | { |
524 | struct request *rq; | |
525 | int err; | |
526 | ||
527 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
4aff5e23 | 528 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
f98d2dfd BC |
529 | rq->data = NULL; |
530 | rq->data_len = 0; | |
7a85f889 | 531 | rq->extra_len = 0; |
3d6392cf | 532 | rq->timeout = BLK_DEFAULT_SG_TIMEOUT; |
f98d2dfd BC |
533 | memset(rq->cmd, 0, sizeof(rq->cmd)); |
534 | rq->cmd[0] = cmd; | |
535 | rq->cmd[4] = data; | |
536 | rq->cmd_len = 6; | |
537 | err = blk_execute_rq(q, bd_disk, rq, 0); | |
538 | blk_put_request(rq); | |
539 | ||
540 | return err; | |
541 | } | |
542 | ||
165125e1 JA |
543 | static inline int blk_send_start_stop(struct request_queue *q, |
544 | struct gendisk *bd_disk, int data) | |
f98d2dfd BC |
545 | { |
546 | return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data); | |
547 | } | |
548 | ||
45e79a3a FT |
549 | int scsi_cmd_ioctl(struct file *file, struct request_queue *q, |
550 | struct gendisk *bd_disk, unsigned int cmd, void __user *arg) | |
1da177e4 | 551 | { |
f98d2dfd | 552 | int err; |
1da177e4 | 553 | |
45e79a3a | 554 | if (!q || blk_get_queue(q)) |
1da177e4 LT |
555 | return -ENXIO; |
556 | ||
557 | switch (cmd) { | |
558 | /* | |
559 | * new sgv3 interface | |
560 | */ | |
561 | case SG_GET_VERSION_NUM: | |
562 | err = sg_get_version(arg); | |
563 | break; | |
564 | case SCSI_IOCTL_GET_IDLUN: | |
565 | err = scsi_get_idlun(q, arg); | |
566 | break; | |
567 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
568 | err = scsi_get_bus(q, arg); | |
569 | break; | |
570 | case SG_SET_TIMEOUT: | |
571 | err = sg_set_timeout(q, arg); | |
572 | break; | |
573 | case SG_GET_TIMEOUT: | |
574 | err = sg_get_timeout(q); | |
575 | break; | |
576 | case SG_GET_RESERVED_SIZE: | |
577 | err = sg_get_reserved_size(q, arg); | |
578 | break; | |
579 | case SG_SET_RESERVED_SIZE: | |
580 | err = sg_set_reserved_size(q, arg); | |
581 | break; | |
582 | case SG_EMULATED_HOST: | |
583 | err = sg_emulated_host(q, arg); | |
584 | break; | |
585 | case SG_IO: { | |
586 | struct sg_io_hdr hdr; | |
587 | ||
588 | err = -EFAULT; | |
589 | if (copy_from_user(&hdr, arg, sizeof(hdr))) | |
590 | break; | |
591 | err = sg_io(file, q, bd_disk, &hdr); | |
592 | if (err == -EFAULT) | |
593 | break; | |
594 | ||
595 | if (copy_to_user(arg, &hdr, sizeof(hdr))) | |
596 | err = -EFAULT; | |
597 | break; | |
598 | } | |
599 | case CDROM_SEND_PACKET: { | |
600 | struct cdrom_generic_command cgc; | |
601 | struct sg_io_hdr hdr; | |
602 | ||
603 | err = -EFAULT; | |
604 | if (copy_from_user(&cgc, arg, sizeof(cgc))) | |
605 | break; | |
606 | cgc.timeout = clock_t_to_jiffies(cgc.timeout); | |
607 | memset(&hdr, 0, sizeof(hdr)); | |
608 | hdr.interface_id = 'S'; | |
609 | hdr.cmd_len = sizeof(cgc.cmd); | |
610 | hdr.dxfer_len = cgc.buflen; | |
611 | err = 0; | |
612 | switch (cgc.data_direction) { | |
613 | case CGC_DATA_UNKNOWN: | |
614 | hdr.dxfer_direction = SG_DXFER_UNKNOWN; | |
615 | break; | |
616 | case CGC_DATA_WRITE: | |
617 | hdr.dxfer_direction = SG_DXFER_TO_DEV; | |
618 | break; | |
619 | case CGC_DATA_READ: | |
620 | hdr.dxfer_direction = SG_DXFER_FROM_DEV; | |
621 | break; | |
622 | case CGC_DATA_NONE: | |
623 | hdr.dxfer_direction = SG_DXFER_NONE; | |
624 | break; | |
625 | default: | |
626 | err = -EINVAL; | |
627 | } | |
628 | if (err) | |
629 | break; | |
630 | ||
631 | hdr.dxferp = cgc.buffer; | |
632 | hdr.sbp = cgc.sense; | |
633 | if (hdr.sbp) | |
634 | hdr.mx_sb_len = sizeof(struct request_sense); | |
635 | hdr.timeout = cgc.timeout; | |
636 | hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd; | |
637 | hdr.cmd_len = sizeof(cgc.cmd); | |
638 | ||
639 | err = sg_io(file, q, bd_disk, &hdr); | |
640 | if (err == -EFAULT) | |
641 | break; | |
642 | ||
643 | if (hdr.status) | |
644 | err = -EIO; | |
645 | ||
646 | cgc.stat = err; | |
647 | cgc.buflen = hdr.resid; | |
648 | if (copy_to_user(arg, &cgc, sizeof(cgc))) | |
649 | err = -EFAULT; | |
650 | ||
651 | break; | |
652 | } | |
653 | ||
654 | /* | |
655 | * old junk scsi send command ioctl | |
656 | */ | |
657 | case SCSI_IOCTL_SEND_COMMAND: | |
658 | printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm); | |
659 | err = -EINVAL; | |
660 | if (!arg) | |
661 | break; | |
662 | ||
663 | err = sg_scsi_ioctl(file, q, bd_disk, arg); | |
664 | break; | |
665 | case CDROMCLOSETRAY: | |
f98d2dfd BC |
666 | err = blk_send_start_stop(q, bd_disk, 0x03); |
667 | break; | |
1da177e4 | 668 | case CDROMEJECT: |
f98d2dfd | 669 | err = blk_send_start_stop(q, bd_disk, 0x02); |
1da177e4 LT |
670 | break; |
671 | default: | |
672 | err = -ENOTTY; | |
673 | } | |
674 | ||
675 | blk_put_queue(q); | |
676 | return err; | |
677 | } | |
678 | ||
679 | EXPORT_SYMBOL(scsi_cmd_ioctl); |