1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
5 | * Carsten Otte <Cotte@de.ibm.com> |
6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
7 | * Bugreports.to..: <Linux390@de.ibm.com> |
8 | * Copyright IBM Corp. 1999, 2001 |
9 | * |
10 | * i/o controls for the dasd driver. |
11 | */ |
12 | |
13 | #define KMSG_COMPONENT "dasd" |
14 | |
15 | #include <linux/interrupt.h> |
16 | #include <linux/compat.h> |
17 | #include <linux/major.h> |
18 | #include <linux/fs.h> |
19 | #include <linux/blkpg.h> |
20 | #include <linux/slab.h> |
21 | #include <asm/ccwdev.h> |
22 | #include <asm/schid.h> |
23 | #include <asm/cmb.h> |
24 | #include <linux/uaccess.h> |
25 | #include <linux/dasd_mod.h> |
26 | |
27 | /* This is ugly... */ |
28 | #define "dasd_ioctl:" |
29 | |
30 | #include "dasd_int.h" |
31 | |
32 | |
33 | static int |
34 | dasd_ioctl_api_version(void __user *argp) |
35 | { |
36 | int ver = DASD_API_VERSION; |
37 | return put_user(ver, (int __user *)argp); |
38 | } |
39 | |
40 | /* |
41 | * Enable device. |
42 | * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection |
43 | */ |
44 | static int |
45 | dasd_ioctl_enable(struct block_device *bdev) |
46 | { |
47 | struct dasd_device *base; |
48 | |
49 | if (!capable(CAP_SYS_ADMIN)) |
50 | return -EACCES; |
51 | |
52 | base = dasd_device_from_gendisk(bdev->bd_disk); |
53 | if (!base) |
54 | return -ENODEV; |
55 | |
56 | dasd_enable_device(base); |
57 | dasd_put_device(device: base); |
58 | return 0; |
59 | } |
60 | |
61 | /* |
62 | * Disable device. |
63 | * Used by dasdfmt. Disable I/O operations but allow ioctls. |
64 | */ |
65 | static int |
66 | dasd_ioctl_disable(struct block_device *bdev) |
67 | { |
68 | struct dasd_device *base; |
69 | |
70 | if (!capable(CAP_SYS_ADMIN)) |
71 | return -EACCES; |
72 | |
73 | base = dasd_device_from_gendisk(bdev->bd_disk); |
74 | if (!base) |
75 | return -ENODEV; |
76 | /* |
77 | * Man this is sick. We don't do a real disable but only downgrade |
78 | * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses |
79 | * BIODASDDISABLE to disable accesses to the device via the block |
80 | * device layer but it still wants to do i/o on the device by |
81 | * using the BIODASDFMT ioctl. Therefore the correct state for the |
82 | * device is DASD_STATE_BASIC that allows to do basic i/o. |
83 | */ |
84 | dasd_set_target_state(base, DASD_STATE_BASIC); |
85 | /* |
86 | * Set i_size to zero, since read, write, etc. check against this |
87 | * value. |
88 | */ |
89 | set_capacity(disk: bdev->bd_disk, size: 0); |
90 | dasd_put_device(device: base); |
91 | return 0; |
92 | } |
93 | |
94 | /* |
95 | * Quiesce device. |
96 | */ |
97 | static int dasd_ioctl_quiesce(struct dasd_block *block) |
98 | { |
99 | unsigned long flags; |
100 | struct dasd_device *base; |
101 | |
102 | base = block->base; |
103 | if (!capable (CAP_SYS_ADMIN)) |
104 | return -EACCES; |
105 | |
106 | pr_info("%s: The DASD has been put in the quiesce " |
107 | "state\n" , dev_name(&base->cdev->dev)); |
108 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
109 | dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); |
110 | spin_unlock_irqrestore(lock: get_ccwdev_lock(base->cdev), flags); |
111 | return 0; |
112 | } |
113 | |
114 | |
115 | /* |
116 | * Resume device. |
117 | */ |
118 | static int dasd_ioctl_resume(struct dasd_block *block) |
119 | { |
120 | unsigned long flags; |
121 | struct dasd_device *base; |
122 | |
123 | base = block->base; |
124 | if (!capable (CAP_SYS_ADMIN)) |
125 | return -EACCES; |
126 | |
127 | pr_info("%s: I/O operations have been resumed " |
128 | "on the DASD\n" , dev_name(&base->cdev->dev)); |
129 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
130 | dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); |
131 | spin_unlock_irqrestore(lock: get_ccwdev_lock(base->cdev), flags); |
132 | |
133 | dasd_schedule_block_bh(block); |
134 | dasd_schedule_device_bh(base); |
135 | return 0; |
136 | } |
137 | |
138 | /* |
139 | * Abort all failfast I/O on a device. |
140 | */ |
141 | static int dasd_ioctl_abortio(struct dasd_block *block) |
142 | { |
143 | unsigned long flags; |
144 | struct dasd_device *base; |
145 | struct dasd_ccw_req *cqr, *n; |
146 | |
147 | base = block->base; |
148 | if (!capable(CAP_SYS_ADMIN)) |
149 | return -EACCES; |
150 | |
151 | if (test_and_set_bit(DASD_FLAG_ABORTALL, addr: &base->flags)) |
152 | return 0; |
153 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s" , "abortall flag set" ); |
154 | |
155 | spin_lock_irqsave(&block->request_queue_lock, flags); |
156 | spin_lock(lock: &block->queue_lock); |
157 | list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { |
158 | if (test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && |
159 | cqr->callback_data && |
160 | cqr->callback_data != DASD_SLEEPON_START_TAG && |
161 | cqr->callback_data != DASD_SLEEPON_END_TAG) { |
162 | spin_unlock(lock: &block->queue_lock); |
163 | blk_abort_request(cqr->callback_data); |
164 | spin_lock(lock: &block->queue_lock); |
165 | } |
166 | } |
167 | spin_unlock(lock: &block->queue_lock); |
168 | spin_unlock_irqrestore(lock: &block->request_queue_lock, flags); |
169 | |
170 | dasd_schedule_block_bh(block); |
171 | return 0; |
172 | } |
173 | |
174 | /* |
175 | * Allow I/O on a device |
176 | */ |
177 | static int dasd_ioctl_allowio(struct dasd_block *block) |
178 | { |
179 | struct dasd_device *base; |
180 | |
181 | base = block->base; |
182 | if (!capable(CAP_SYS_ADMIN)) |
183 | return -EACCES; |
184 | |
185 | if (test_and_clear_bit(DASD_FLAG_ABORTALL, addr: &base->flags)) |
186 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s" , "abortall flag unset" ); |
187 | |
188 | return 0; |
189 | } |
190 | |
191 | /* |
192 | * performs formatting of _device_ according to _fdata_ |
193 | * Note: The discipline's format_function is assumed to deliver formatting |
194 | * commands to format multiple units of the device. In terms of the ECKD |
195 | * devices this means CCWs are generated to format multiple tracks. |
196 | */ |
197 | static int |
198 | dasd_format(struct dasd_block *block, struct format_data_t *fdata) |
199 | { |
200 | struct dasd_device *base; |
201 | int rc; |
202 | |
203 | base = block->base; |
204 | if (base->discipline->format_device == NULL) |
205 | return -EPERM; |
206 | |
207 | if (base->state != DASD_STATE_BASIC) { |
208 | pr_warn("%s: The DASD cannot be formatted while it is enabled\n" , |
209 | dev_name(&base->cdev->dev)); |
210 | return -EBUSY; |
211 | } |
212 | |
213 | DBF_DEV_EVENT(DBF_NOTICE, base, |
214 | "formatting units %u to %u (%u B blocks) flags %u" , |
215 | fdata->start_unit, |
216 | fdata->stop_unit, fdata->blksize, fdata->intensity); |
217 | |
218 | /* Since dasdfmt keeps the device open after it was disabled, |
219 | * there still exists an inode for this device. |
220 | * We must update i_blkbits, otherwise we might get errors when |
221 | * enabling the device later. |
222 | */ |
223 | if (fdata->start_unit == 0) { |
224 | block->gdp->part0->bd_inode->i_blkbits = |
225 | blksize_bits(size: fdata->blksize); |
226 | } |
227 | |
228 | rc = base->discipline->format_device(base, fdata, 1); |
229 | if (rc == -EAGAIN) |
230 | rc = base->discipline->format_device(base, fdata, 0); |
231 | |
232 | return rc; |
233 | } |
234 | |
235 | static int dasd_check_format(struct dasd_block *block, |
236 | struct format_check_t *cdata) |
237 | { |
238 | struct dasd_device *base; |
239 | int rc; |
240 | |
241 | base = block->base; |
242 | if (!base->discipline->check_device_format) |
243 | return -ENOTTY; |
244 | |
245 | rc = base->discipline->check_device_format(base, cdata, 1); |
246 | if (rc == -EAGAIN) |
247 | rc = base->discipline->check_device_format(base, cdata, 0); |
248 | |
249 | return rc; |
250 | } |
251 | |
252 | /* |
253 | * Format device. |
254 | */ |
255 | static int |
256 | dasd_ioctl_format(struct block_device *bdev, void __user *argp) |
257 | { |
258 | struct dasd_device *base; |
259 | struct format_data_t fdata; |
260 | int rc; |
261 | |
262 | if (!capable(CAP_SYS_ADMIN)) |
263 | return -EACCES; |
264 | if (!argp) |
265 | return -EINVAL; |
266 | base = dasd_device_from_gendisk(bdev->bd_disk); |
267 | if (!base) |
268 | return -ENODEV; |
269 | if (base->features & DASD_FEATURE_READONLY || |
270 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { |
271 | dasd_put_device(device: base); |
272 | return -EROFS; |
273 | } |
274 | if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { |
275 | dasd_put_device(device: base); |
276 | return -EFAULT; |
277 | } |
278 | if (bdev_is_partition(bdev)) { |
279 | pr_warn("%s: The specified DASD is a partition and cannot be formatted\n" , |
280 | dev_name(&base->cdev->dev)); |
281 | dasd_put_device(device: base); |
282 | return -EINVAL; |
283 | } |
284 | rc = dasd_format(block: base->block, fdata: &fdata); |
285 | dasd_put_device(device: base); |
286 | |
287 | return rc; |
288 | } |
289 | |
290 | /* |
291 | * Check device format |
292 | */ |
293 | static int dasd_ioctl_check_format(struct block_device *bdev, void __user *argp) |
294 | { |
295 | struct format_check_t cdata; |
296 | struct dasd_device *base; |
297 | int rc = 0; |
298 | |
299 | if (!argp) |
300 | return -EINVAL; |
301 | |
302 | base = dasd_device_from_gendisk(bdev->bd_disk); |
303 | if (!base) |
304 | return -ENODEV; |
305 | if (bdev_is_partition(bdev)) { |
306 | pr_warn("%s: The specified DASD is a partition and cannot be checked\n" , |
307 | dev_name(&base->cdev->dev)); |
308 | rc = -EINVAL; |
309 | goto out_err; |
310 | } |
311 | |
312 | if (copy_from_user(to: &cdata, from: argp, n: sizeof(cdata))) { |
313 | rc = -EFAULT; |
314 | goto out_err; |
315 | } |
316 | |
317 | rc = dasd_check_format(block: base->block, cdata: &cdata); |
318 | if (rc) |
319 | goto out_err; |
320 | |
321 | if (copy_to_user(to: argp, from: &cdata, n: sizeof(cdata))) |
322 | rc = -EFAULT; |
323 | |
324 | out_err: |
325 | dasd_put_device(device: base); |
326 | |
327 | return rc; |
328 | } |
329 | |
330 | static int dasd_release_space(struct dasd_device *device, |
331 | struct format_data_t *rdata) |
332 | { |
333 | if (!device->discipline->is_ese && !device->discipline->is_ese(device)) |
334 | return -ENOTSUPP; |
335 | if (!device->discipline->release_space) |
336 | return -ENOTSUPP; |
337 | |
338 | return device->discipline->release_space(device, rdata); |
339 | } |
340 | |
341 | /* |
342 | * Release allocated space |
343 | */ |
344 | static int dasd_ioctl_release_space(struct block_device *bdev, void __user *argp) |
345 | { |
346 | struct format_data_t rdata; |
347 | struct dasd_device *base; |
348 | int rc = 0; |
349 | |
350 | if (!capable(CAP_SYS_ADMIN)) |
351 | return -EACCES; |
352 | if (!argp) |
353 | return -EINVAL; |
354 | |
355 | base = dasd_device_from_gendisk(bdev->bd_disk); |
356 | if (!base) |
357 | return -ENODEV; |
358 | if (base->features & DASD_FEATURE_READONLY || |
359 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { |
360 | rc = -EROFS; |
361 | goto out_err; |
362 | } |
363 | if (bdev_is_partition(bdev)) { |
364 | pr_warn("%s: The specified DASD is a partition and tracks cannot be released\n" , |
365 | dev_name(&base->cdev->dev)); |
366 | rc = -EINVAL; |
367 | goto out_err; |
368 | } |
369 | |
370 | if (copy_from_user(to: &rdata, from: argp, n: sizeof(rdata))) { |
371 | rc = -EFAULT; |
372 | goto out_err; |
373 | } |
374 | |
375 | rc = dasd_release_space(device: base, rdata: &rdata); |
376 | |
377 | out_err: |
378 | dasd_put_device(device: base); |
379 | |
380 | return rc; |
381 | } |
382 | |
383 | /* |
384 | * Swap driver iternal copy relation. |
385 | */ |
386 | static int |
387 | dasd_ioctl_copy_pair_swap(struct block_device *bdev, void __user *argp) |
388 | { |
389 | struct dasd_copypair_swap_data_t data; |
390 | struct dasd_device *device; |
391 | int rc; |
392 | |
393 | if (!capable(CAP_SYS_ADMIN)) |
394 | return -EACCES; |
395 | |
396 | device = dasd_device_from_gendisk(bdev->bd_disk); |
397 | if (!device) |
398 | return -ENODEV; |
399 | |
400 | if (copy_from_user(&data, argp, sizeof(struct dasd_copypair_swap_data_t))) { |
401 | dasd_put_device(device); |
402 | return -EFAULT; |
403 | } |
404 | if (memchr_inv(data.reserved, 0, sizeof(data.reserved))) { |
405 | pr_warn("%s: Invalid swap data specified\n" , |
406 | dev_name(&device->cdev->dev)); |
407 | dasd_put_device(device); |
408 | return DASD_COPYPAIRSWAP_INVALID; |
409 | } |
410 | if (bdev_is_partition(bdev)) { |
411 | pr_warn("%s: The specified DASD is a partition and cannot be swapped\n" , |
412 | dev_name(&device->cdev->dev)); |
413 | dasd_put_device(device); |
414 | return DASD_COPYPAIRSWAP_INVALID; |
415 | } |
416 | if (!device->copy) { |
417 | pr_warn("%s: The specified DASD has no copy pair set up\n" , |
418 | dev_name(&device->cdev->dev)); |
419 | dasd_put_device(device); |
420 | return -ENODEV; |
421 | } |
422 | if (!device->discipline->copy_pair_swap) { |
423 | dasd_put_device(device); |
424 | return -EOPNOTSUPP; |
425 | } |
426 | rc = device->discipline->copy_pair_swap(device, data.primary, |
427 | data.secondary); |
428 | dasd_put_device(device); |
429 | |
430 | return rc; |
431 | } |
432 | |
433 | #ifdef CONFIG_DASD_PROFILE |
434 | /* |
435 | * Reset device profile information |
436 | */ |
437 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
438 | { |
439 | dasd_profile_reset(&block->profile); |
440 | return 0; |
441 | } |
442 | |
443 | /* |
444 | * Return device profile information |
445 | */ |
446 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
447 | { |
448 | struct dasd_profile_info_t *data; |
449 | int rc = 0; |
450 | |
451 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
452 | if (!data) |
453 | return -ENOMEM; |
454 | |
455 | spin_lock_bh(&block->profile.lock); |
456 | if (block->profile.data) { |
457 | data->dasd_io_reqs = block->profile.data->dasd_io_reqs; |
458 | data->dasd_io_sects = block->profile.data->dasd_io_sects; |
459 | memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, |
460 | sizeof(data->dasd_io_secs)); |
461 | memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, |
462 | sizeof(data->dasd_io_times)); |
463 | memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, |
464 | sizeof(data->dasd_io_timps)); |
465 | memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, |
466 | sizeof(data->dasd_io_time1)); |
467 | memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, |
468 | sizeof(data->dasd_io_time2)); |
469 | memcpy(data->dasd_io_time2ps, |
470 | block->profile.data->dasd_io_time2ps, |
471 | sizeof(data->dasd_io_time2ps)); |
472 | memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, |
473 | sizeof(data->dasd_io_time3)); |
474 | memcpy(data->dasd_io_nr_req, |
475 | block->profile.data->dasd_io_nr_req, |
476 | sizeof(data->dasd_io_nr_req)); |
477 | spin_unlock_bh(&block->profile.lock); |
478 | } else { |
479 | spin_unlock_bh(&block->profile.lock); |
480 | rc = -EIO; |
481 | goto out; |
482 | } |
483 | if (copy_to_user(argp, data, sizeof(*data))) |
484 | rc = -EFAULT; |
485 | out: |
486 | kfree(data); |
487 | return rc; |
488 | } |
489 | #else |
490 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
491 | { |
492 | return -ENOTTY; |
493 | } |
494 | |
495 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
496 | { |
497 | return -ENOTTY; |
498 | } |
499 | #endif |
500 | |
501 | /* |
502 | * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. |
503 | */ |
504 | static int __dasd_ioctl_information(struct dasd_block *block, |
505 | struct dasd_information2_t *dasd_info) |
506 | { |
507 | struct subchannel_id sch_id; |
508 | struct ccw_dev_id dev_id; |
509 | struct dasd_device *base; |
510 | struct ccw_device *cdev; |
511 | struct list_head *l; |
512 | unsigned long flags; |
513 | int rc; |
514 | |
515 | base = block->base; |
516 | if (!base->discipline || !base->discipline->fill_info) |
517 | return -EINVAL; |
518 | |
519 | rc = base->discipline->fill_info(base, dasd_info); |
520 | if (rc) |
521 | return rc; |
522 | |
523 | cdev = base->cdev; |
524 | ccw_device_get_id(cdev, &dev_id); |
525 | ccw_device_get_schid(cdev, &sch_id); |
526 | |
527 | dasd_info->devno = dev_id.devno; |
528 | dasd_info->schid = sch_id.sch_no; |
529 | dasd_info->cu_type = cdev->id.cu_type; |
530 | dasd_info->cu_model = cdev->id.cu_model; |
531 | dasd_info->dev_type = cdev->id.dev_type; |
532 | dasd_info->dev_model = cdev->id.dev_model; |
533 | dasd_info->status = base->state; |
534 | /* |
535 | * The open_count is increased for every opener, that includes |
536 | * the blkdev_get in dasd_scan_partitions. |
537 | * This must be hidden from user-space. |
538 | */ |
539 | dasd_info->open_count = atomic_read(v: &block->open_count); |
540 | if (!block->bdev_handle) |
541 | dasd_info->open_count++; |
542 | |
543 | /* |
544 | * check if device is really formatted |
545 | * LDL / CDL was returned by 'fill_info' |
546 | */ |
547 | if ((base->state < DASD_STATE_READY) || |
548 | (dasd_check_blocksize(bsize: block->bp_block))) |
549 | dasd_info->format = DASD_FORMAT_NONE; |
550 | |
551 | dasd_info->features |= |
552 | ((base->features & DASD_FEATURE_READONLY) != 0); |
553 | |
554 | memcpy(dasd_info->type, base->discipline->name, 4); |
555 | |
556 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
557 | list_for_each(l, &base->ccw_queue) |
558 | dasd_info->chanq_len++; |
559 | spin_unlock_irqrestore(lock: get_ccwdev_lock(base->cdev), flags); |
560 | return 0; |
561 | } |
562 | |
563 | static int dasd_ioctl_information(struct dasd_block *block, void __user *argp, |
564 | size_t copy_size) |
565 | { |
566 | struct dasd_information2_t *dasd_info; |
567 | int error; |
568 | |
569 | dasd_info = kzalloc(sizeof(*dasd_info), GFP_KERNEL); |
570 | if (!dasd_info) |
571 | return -ENOMEM; |
572 | |
573 | error = __dasd_ioctl_information(block, dasd_info); |
574 | if (!error && copy_to_user(to: argp, from: dasd_info, n: copy_size)) |
575 | error = -EFAULT; |
576 | kfree(objp: dasd_info); |
577 | return error; |
578 | } |
579 | |
580 | /* |
581 | * Set read only |
582 | */ |
583 | int dasd_set_read_only(struct block_device *bdev, bool ro) |
584 | { |
585 | struct dasd_device *base; |
586 | int rc; |
587 | |
588 | /* do not manipulate hardware state for partitions */ |
589 | if (bdev_is_partition(bdev)) |
590 | return 0; |
591 | |
592 | base = dasd_device_from_gendisk(bdev->bd_disk); |
593 | if (!base) |
594 | return -ENODEV; |
595 | if (!ro && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) |
596 | rc = -EROFS; |
597 | else |
598 | rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, ro); |
599 | dasd_put_device(device: base); |
600 | return rc; |
601 | } |
602 | |
603 | static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, |
604 | struct cmbdata __user *argp) |
605 | { |
606 | size_t size = _IOC_SIZE(cmd); |
607 | struct cmbdata data; |
608 | int ret; |
609 | |
610 | ret = cmf_readall(block->base->cdev, &data); |
611 | if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) |
612 | return -EFAULT; |
613 | return ret; |
614 | } |
615 | |
616 | int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, |
617 | unsigned int cmd, unsigned long arg) |
618 | { |
619 | struct dasd_block *block; |
620 | struct dasd_device *base; |
621 | void __user *argp; |
622 | int rc; |
623 | |
624 | if (is_compat_task()) |
625 | argp = compat_ptr(uptr: arg); |
626 | else |
627 | argp = (void __user *)arg; |
628 | |
629 | if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) |
630 | return -EINVAL; |
631 | |
632 | base = dasd_device_from_gendisk(bdev->bd_disk); |
633 | if (!base) |
634 | return -ENODEV; |
635 | block = base->block; |
636 | rc = 0; |
637 | switch (cmd) { |
638 | case BIODASDDISABLE: |
639 | rc = dasd_ioctl_disable(bdev); |
640 | break; |
641 | case BIODASDENABLE: |
642 | rc = dasd_ioctl_enable(bdev); |
643 | break; |
644 | case BIODASDQUIESCE: |
645 | rc = dasd_ioctl_quiesce(block); |
646 | break; |
647 | case BIODASDRESUME: |
648 | rc = dasd_ioctl_resume(block); |
649 | break; |
650 | case BIODASDABORTIO: |
651 | rc = dasd_ioctl_abortio(block); |
652 | break; |
653 | case BIODASDALLOWIO: |
654 | rc = dasd_ioctl_allowio(block); |
655 | break; |
656 | case BIODASDFMT: |
657 | rc = dasd_ioctl_format(bdev, argp); |
658 | break; |
659 | case BIODASDCHECKFMT: |
660 | rc = dasd_ioctl_check_format(bdev, argp); |
661 | break; |
662 | case BIODASDINFO: |
663 | rc = dasd_ioctl_information(block, argp, |
664 | sizeof(struct dasd_information_t)); |
665 | break; |
666 | case BIODASDINFO2: |
667 | rc = dasd_ioctl_information(block, argp, |
668 | sizeof(struct dasd_information2_t)); |
669 | break; |
670 | case BIODASDPRRD: |
671 | rc = dasd_ioctl_read_profile(block, argp); |
672 | break; |
673 | case BIODASDPRRST: |
674 | rc = dasd_ioctl_reset_profile(block); |
675 | break; |
676 | case DASDAPIVER: |
677 | rc = dasd_ioctl_api_version(argp); |
678 | break; |
679 | case BIODASDCMFENABLE: |
680 | rc = enable_cmf(base->cdev); |
681 | break; |
682 | case BIODASDCMFDISABLE: |
683 | rc = disable_cmf(base->cdev); |
684 | break; |
685 | case BIODASDREADALLCMB: |
686 | rc = dasd_ioctl_readall_cmb(block, cmd, argp); |
687 | break; |
688 | case BIODASDRAS: |
689 | rc = dasd_ioctl_release_space(bdev, argp); |
690 | break; |
691 | case BIODASDCOPYPAIRSWAP: |
692 | rc = dasd_ioctl_copy_pair_swap(bdev, argp); |
693 | break; |
694 | default: |
695 | /* if the discipline has an ioctl method try it. */ |
696 | rc = -ENOTTY; |
697 | if (base->discipline->ioctl) |
698 | rc = base->discipline->ioctl(block, cmd, argp); |
699 | } |
700 | dasd_put_device(device: base); |
701 | return rc; |
702 | } |
703 | |
704 | |
705 | /** |
706 | * dasd_biodasdinfo() - fill out the dasd information structure |
707 | * @disk: [in] pointer to gendisk structure that references a DASD |
708 | * @info: [out] pointer to the dasd_information2_t structure |
709 | * |
710 | * Provide access to DASD specific information. |
711 | * The gendisk structure is checked if it belongs to the DASD driver by |
712 | * comparing the gendisk->fops pointer. |
713 | * If it does not belong to the DASD driver -EINVAL is returned. |
714 | * Otherwise the provided dasd_information2_t structure is filled out. |
715 | * |
716 | * Returns: |
717 | * %0 on success and a negative error value on failure. |
718 | */ |
719 | int dasd_biodasdinfo(struct gendisk *disk, struct dasd_information2_t *info) |
720 | { |
721 | struct dasd_device *base; |
722 | int error; |
723 | |
724 | if (disk->fops != &dasd_device_operations) |
725 | return -EINVAL; |
726 | |
727 | base = dasd_device_from_gendisk(disk); |
728 | if (!base) |
729 | return -ENODEV; |
730 | error = __dasd_ioctl_information(block: base->block, dasd_info: info); |
731 | dasd_put_device(device: base); |
732 | return error; |
733 | } |
734 | /* export that symbol_get in partition detection is possible */ |
735 | EXPORT_SYMBOL_GPL(dasd_biodasdinfo); |
736 | |