Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
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> | |
a53c8fab | 8 | * Copyright IBM Corp. 1999, 2001 |
1da177e4 LT |
9 | * |
10 | * i/o controls for the dasd driver. | |
11 | */ | |
fc19f381 SH |
12 | |
13 | #define KMSG_COMPONENT "dasd" | |
14 | ||
1da177e4 | 15 | #include <linux/interrupt.h> |
048cd4e5 | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/major.h> |
18 | #include <linux/fs.h> | |
19 | #include <linux/blkpg.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 | 21 | #include <asm/ccwdev.h> |
287a0933 | 22 | #include <asm/schid.h> |
8b2eb664 | 23 | #include <asm/cmb.h> |
7c0f6ba6 | 24 | #include <linux/uaccess.h> |
26d7e28e | 25 | #include <linux/dasd_mod.h> |
1da177e4 LT |
26 | |
27 | /* This is ugly... */ | |
28 | #define PRINTK_HEADER "dasd_ioctl:" | |
29 | ||
30 | #include "dasd_int.h" | |
31 | ||
1da177e4 | 32 | |
1da177e4 | 33 | static int |
13c6204f | 34 | dasd_ioctl_api_version(void __user *argp) |
1da177e4 LT |
35 | { |
36 | int ver = DASD_API_VERSION; | |
b5029622 | 37 | return put_user(ver, (int __user *)argp); |
1da177e4 LT |
38 | } |
39 | ||
40 | /* | |
41 | * Enable device. | |
42 | * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection | |
43 | */ | |
44 | static int | |
13c6204f | 45 | dasd_ioctl_enable(struct block_device *bdev) |
1da177e4 | 46 | { |
65f8da47 | 47 | struct dasd_device *base; |
1da177e4 LT |
48 | |
49 | if (!capable(CAP_SYS_ADMIN)) | |
50 | return -EACCES; | |
13c6204f | 51 | |
65f8da47 SW |
52 | base = dasd_device_from_gendisk(bdev->bd_disk); |
53 | if (!base) | |
54 | return -ENODEV; | |
55 | ||
56 | dasd_enable_device(base); | |
65f8da47 | 57 | dasd_put_device(base); |
1da177e4 LT |
58 | return 0; |
59 | } | |
60 | ||
61 | /* | |
62 | * Disable device. | |
63 | * Used by dasdfmt. Disable I/O operations but allow ioctls. | |
64 | */ | |
65 | static int | |
13c6204f | 66 | dasd_ioctl_disable(struct block_device *bdev) |
1da177e4 | 67 | { |
65f8da47 | 68 | struct dasd_device *base; |
1da177e4 LT |
69 | |
70 | if (!capable(CAP_SYS_ADMIN)) | |
71 | return -EACCES; | |
13c6204f | 72 | |
65f8da47 SW |
73 | base = dasd_device_from_gendisk(bdev->bd_disk); |
74 | if (!base) | |
75 | return -ENODEV; | |
1da177e4 LT |
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 | */ | |
65f8da47 | 84 | dasd_set_target_state(base, DASD_STATE_BASIC); |
1da177e4 LT |
85 | /* |
86 | * Set i_size to zero, since read, write, etc. check against this | |
87 | * value. | |
88 | */ | |
a782483c | 89 | set_capacity(bdev->bd_disk, 0); |
65f8da47 | 90 | dasd_put_device(base); |
1da177e4 LT |
91 | return 0; |
92 | } | |
93 | ||
94 | /* | |
95 | * Quiesce device. | |
96 | */ | |
8e09f215 | 97 | static int dasd_ioctl_quiesce(struct dasd_block *block) |
1da177e4 | 98 | { |
1da177e4 | 99 | unsigned long flags; |
8e09f215 | 100 | struct dasd_device *base; |
138c014d | 101 | |
8e09f215 | 102 | base = block->base; |
1da177e4 LT |
103 | if (!capable (CAP_SYS_ADMIN)) |
104 | return -EACCES; | |
138c014d | 105 | |
ca99dab0 SH |
106 | pr_info("%s: The DASD has been put in the quiesce " |
107 | "state\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 108 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 109 | dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 110 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 LT |
111 | return 0; |
112 | } | |
113 | ||
114 | ||
115 | /* | |
fc19f381 | 116 | * Resume device. |
1da177e4 | 117 | */ |
8e09f215 | 118 | static int dasd_ioctl_resume(struct dasd_block *block) |
1da177e4 | 119 | { |
1da177e4 | 120 | unsigned long flags; |
8e09f215 | 121 | struct dasd_device *base; |
138c014d | 122 | |
8e09f215 | 123 | base = block->base; |
138c014d | 124 | if (!capable (CAP_SYS_ADMIN)) |
1da177e4 LT |
125 | return -EACCES; |
126 | ||
ca99dab0 SH |
127 | pr_info("%s: I/O operations have been resumed " |
128 | "on the DASD\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 129 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 130 | dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 131 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 | 132 | |
8e09f215 | 133 | dasd_schedule_block_bh(block); |
1da177e4 LT |
134 | return 0; |
135 | } | |
136 | ||
5ea34a01 HR |
137 | /* |
138 | * Abort all failfast I/O on a device. | |
139 | */ | |
140 | static int dasd_ioctl_abortio(struct dasd_block *block) | |
141 | { | |
142 | unsigned long flags; | |
143 | struct dasd_device *base; | |
144 | struct dasd_ccw_req *cqr, *n; | |
145 | ||
146 | base = block->base; | |
147 | if (!capable(CAP_SYS_ADMIN)) | |
148 | return -EACCES; | |
149 | ||
150 | if (test_and_set_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
151 | return 0; | |
152 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag set"); | |
153 | ||
154 | spin_lock_irqsave(&block->request_queue_lock, flags); | |
155 | spin_lock(&block->queue_lock); | |
156 | list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { | |
157 | if (test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && | |
158 | cqr->callback_data && | |
159 | cqr->callback_data != DASD_SLEEPON_START_TAG && | |
160 | cqr->callback_data != DASD_SLEEPON_END_TAG) { | |
161 | spin_unlock(&block->queue_lock); | |
162 | blk_abort_request(cqr->callback_data); | |
163 | spin_lock(&block->queue_lock); | |
164 | } | |
165 | } | |
166 | spin_unlock(&block->queue_lock); | |
167 | spin_unlock_irqrestore(&block->request_queue_lock, flags); | |
168 | ||
169 | dasd_schedule_block_bh(block); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Allow I/O on a device | |
175 | */ | |
176 | static int dasd_ioctl_allowio(struct dasd_block *block) | |
177 | { | |
178 | struct dasd_device *base; | |
179 | ||
180 | base = block->base; | |
181 | if (!capable(CAP_SYS_ADMIN)) | |
182 | return -EACCES; | |
183 | ||
184 | if (test_and_clear_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
185 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag unset"); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
1da177e4 LT |
190 | /* |
191 | * performs formatting of _device_ according to _fdata_ | |
192 | * Note: The discipline's format_function is assumed to deliver formatting | |
d42e1712 SH |
193 | * commands to format multiple units of the device. In terms of the ECKD |
194 | * devices this means CCWs are generated to format multiple tracks. | |
1da177e4 | 195 | */ |
d42e1712 SH |
196 | static int |
197 | dasd_format(struct dasd_block *block, struct format_data_t *fdata) | |
1da177e4 | 198 | { |
8e09f215 | 199 | struct dasd_device *base; |
8542885b | 200 | int rc; |
1da177e4 | 201 | |
8e09f215 SW |
202 | base = block->base; |
203 | if (base->discipline->format_device == NULL) | |
1da177e4 LT |
204 | return -EPERM; |
205 | ||
8e09f215 | 206 | if (base->state != DASD_STATE_BASIC) { |
d42e1712 SH |
207 | pr_warn("%s: The DASD cannot be formatted while it is enabled\n", |
208 | dev_name(&base->cdev->dev)); | |
1da177e4 LT |
209 | return -EBUSY; |
210 | } | |
211 | ||
8e09f215 | 212 | DBF_DEV_EVENT(DBF_NOTICE, base, |
b44b0ab3 | 213 | "formatting units %u to %u (%u B blocks) flags %u", |
1da177e4 LT |
214 | fdata->start_unit, |
215 | fdata->stop_unit, fdata->blksize, fdata->intensity); | |
216 | ||
217 | /* Since dasdfmt keeps the device open after it was disabled, | |
218 | * there still exists an inode for this device. | |
219 | * We must update i_blkbits, otherwise we might get errors when | |
220 | * enabling the device later. | |
221 | */ | |
222 | if (fdata->start_unit == 0) { | |
977115c0 CH |
223 | block->gdp->part0->bd_inode->i_blkbits = |
224 | blksize_bits(fdata->blksize); | |
1da177e4 LT |
225 | } |
226 | ||
8542885b JH |
227 | rc = base->discipline->format_device(base, fdata, 1); |
228 | if (rc == -EAGAIN) | |
229 | rc = base->discipline->format_device(base, fdata, 0); | |
230 | ||
231 | return rc; | |
1da177e4 LT |
232 | } |
233 | ||
8fd57520 JH |
234 | static int dasd_check_format(struct dasd_block *block, |
235 | struct format_check_t *cdata) | |
236 | { | |
237 | struct dasd_device *base; | |
238 | int rc; | |
239 | ||
240 | base = block->base; | |
241 | if (!base->discipline->check_device_format) | |
242 | return -ENOTTY; | |
243 | ||
244 | rc = base->discipline->check_device_format(base, cdata, 1); | |
245 | if (rc == -EAGAIN) | |
246 | rc = base->discipline->check_device_format(base, cdata, 0); | |
247 | ||
248 | return rc; | |
249 | } | |
250 | ||
1da177e4 LT |
251 | /* |
252 | * Format device. | |
253 | */ | |
254 | static int | |
13c6204f | 255 | dasd_ioctl_format(struct block_device *bdev, void __user *argp) |
1da177e4 | 256 | { |
65f8da47 | 257 | struct dasd_device *base; |
1da177e4 | 258 | struct format_data_t fdata; |
65f8da47 | 259 | int rc; |
1da177e4 LT |
260 | |
261 | if (!capable(CAP_SYS_ADMIN)) | |
262 | return -EACCES; | |
13c6204f | 263 | if (!argp) |
1da177e4 | 264 | return -EINVAL; |
65f8da47 SW |
265 | base = dasd_device_from_gendisk(bdev->bd_disk); |
266 | if (!base) | |
267 | return -ENODEV; | |
268 | if (base->features & DASD_FEATURE_READONLY || | |
269 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
270 | dasd_put_device(base); | |
1da177e4 | 271 | return -EROFS; |
65f8da47 SW |
272 | } |
273 | if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { | |
274 | dasd_put_device(base); | |
1da177e4 | 275 | return -EFAULT; |
65f8da47 | 276 | } |
fa01b1e9 | 277 | if (bdev_is_partition(bdev)) { |
baebc70a JP |
278 | pr_warn("%s: The specified DASD is a partition and cannot be formatted\n", |
279 | dev_name(&base->cdev->dev)); | |
65f8da47 | 280 | dasd_put_device(base); |
1da177e4 LT |
281 | return -EINVAL; |
282 | } | |
65f8da47 SW |
283 | rc = dasd_format(base->block, &fdata); |
284 | dasd_put_device(base); | |
8fd57520 JH |
285 | |
286 | return rc; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Check device format | |
291 | */ | |
292 | static int dasd_ioctl_check_format(struct block_device *bdev, void __user *argp) | |
293 | { | |
294 | struct format_check_t cdata; | |
295 | struct dasd_device *base; | |
296 | int rc = 0; | |
297 | ||
298 | if (!argp) | |
299 | return -EINVAL; | |
300 | ||
301 | base = dasd_device_from_gendisk(bdev->bd_disk); | |
302 | if (!base) | |
303 | return -ENODEV; | |
fa01b1e9 | 304 | if (bdev_is_partition(bdev)) { |
8fd57520 JH |
305 | pr_warn("%s: The specified DASD is a partition and cannot be checked\n", |
306 | dev_name(&base->cdev->dev)); | |
307 | rc = -EINVAL; | |
308 | goto out_err; | |
309 | } | |
310 | ||
311 | if (copy_from_user(&cdata, argp, sizeof(cdata))) { | |
312 | rc = -EFAULT; | |
313 | goto out_err; | |
314 | } | |
315 | ||
316 | rc = dasd_check_format(base->block, &cdata); | |
317 | if (rc) | |
318 | goto out_err; | |
319 | ||
320 | if (copy_to_user(argp, &cdata, sizeof(cdata))) | |
321 | rc = -EFAULT; | |
322 | ||
323 | out_err: | |
324 | dasd_put_device(base); | |
325 | ||
65f8da47 | 326 | return rc; |
1da177e4 LT |
327 | } |
328 | ||
91dc4a19 JH |
329 | static int dasd_release_space(struct dasd_device *device, |
330 | struct format_data_t *rdata) | |
331 | { | |
332 | if (!device->discipline->is_ese && !device->discipline->is_ese(device)) | |
333 | return -ENOTSUPP; | |
334 | if (!device->discipline->release_space) | |
335 | return -ENOTSUPP; | |
336 | ||
337 | return device->discipline->release_space(device, rdata); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Release allocated space | |
342 | */ | |
343 | static int dasd_ioctl_release_space(struct block_device *bdev, void __user *argp) | |
344 | { | |
345 | struct format_data_t rdata; | |
346 | struct dasd_device *base; | |
347 | int rc = 0; | |
348 | ||
349 | if (!capable(CAP_SYS_ADMIN)) | |
350 | return -EACCES; | |
351 | if (!argp) | |
352 | return -EINVAL; | |
353 | ||
354 | base = dasd_device_from_gendisk(bdev->bd_disk); | |
355 | if (!base) | |
356 | return -ENODEV; | |
357 | if (base->features & DASD_FEATURE_READONLY || | |
358 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
359 | rc = -EROFS; | |
360 | goto out_err; | |
361 | } | |
fa01b1e9 | 362 | if (bdev_is_partition(bdev)) { |
91dc4a19 JH |
363 | pr_warn("%s: The specified DASD is a partition and tracks cannot be released\n", |
364 | dev_name(&base->cdev->dev)); | |
365 | rc = -EINVAL; | |
366 | goto out_err; | |
367 | } | |
368 | ||
369 | if (copy_from_user(&rdata, argp, sizeof(rdata))) { | |
370 | rc = -EFAULT; | |
371 | goto out_err; | |
372 | } | |
373 | ||
374 | rc = dasd_release_space(base, &rdata); | |
375 | ||
376 | out_err: | |
377 | dasd_put_device(base); | |
378 | ||
379 | return rc; | |
380 | } | |
381 | ||
112ff512 SH |
382 | /* |
383 | * Swap driver iternal copy relation. | |
384 | */ | |
385 | static int | |
386 | dasd_ioctl_copy_pair_swap(struct block_device *bdev, void __user *argp) | |
387 | { | |
388 | struct dasd_copypair_swap_data_t data; | |
389 | struct dasd_device *device; | |
390 | int rc; | |
391 | ||
392 | if (!capable(CAP_SYS_ADMIN)) | |
393 | return -EACCES; | |
394 | ||
395 | device = dasd_device_from_gendisk(bdev->bd_disk); | |
396 | if (!device) | |
397 | return -ENODEV; | |
398 | ||
399 | if (copy_from_user(&data, argp, sizeof(struct dasd_copypair_swap_data_t))) { | |
400 | dasd_put_device(device); | |
401 | return -EFAULT; | |
402 | } | |
403 | if (memchr_inv(data.reserved, 0, sizeof(data.reserved))) { | |
4ba5f0c3 | 404 | pr_warn("%s: Invalid swap data specified\n", |
112ff512 SH |
405 | dev_name(&device->cdev->dev)); |
406 | dasd_put_device(device); | |
407 | return DASD_COPYPAIRSWAP_INVALID; | |
408 | } | |
409 | if (bdev_is_partition(bdev)) { | |
410 | pr_warn("%s: The specified DASD is a partition and cannot be swapped\n", | |
411 | dev_name(&device->cdev->dev)); | |
412 | dasd_put_device(device); | |
413 | return DASD_COPYPAIRSWAP_INVALID; | |
414 | } | |
415 | if (!device->copy) { | |
416 | pr_warn("%s: The specified DASD has no copy pair set up\n", | |
417 | dev_name(&device->cdev->dev)); | |
418 | dasd_put_device(device); | |
419 | return -ENODEV; | |
420 | } | |
421 | if (!device->discipline->copy_pair_swap) { | |
422 | dasd_put_device(device); | |
423 | return -EOPNOTSUPP; | |
424 | } | |
425 | rc = device->discipline->copy_pair_swap(device, data.primary, | |
426 | data.secondary); | |
427 | dasd_put_device(device); | |
428 | ||
429 | return rc; | |
430 | } | |
431 | ||
1da177e4 LT |
432 | #ifdef CONFIG_DASD_PROFILE |
433 | /* | |
434 | * Reset device profile information | |
435 | */ | |
8e09f215 | 436 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 437 | { |
4fa52aa7 | 438 | dasd_profile_reset(&block->profile); |
1da177e4 LT |
439 | return 0; |
440 | } | |
441 | ||
442 | /* | |
443 | * Return device profile information | |
444 | */ | |
8e09f215 | 445 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 446 | { |
4fa52aa7 | 447 | struct dasd_profile_info_t *data; |
ba465d83 | 448 | int rc = 0; |
4fa52aa7 SW |
449 | |
450 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
451 | if (!data) | |
452 | return -ENOMEM; | |
453 | ||
454 | spin_lock_bh(&block->profile.lock); | |
455 | if (block->profile.data) { | |
456 | data->dasd_io_reqs = block->profile.data->dasd_io_reqs; | |
457 | data->dasd_io_sects = block->profile.data->dasd_io_sects; | |
458 | memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, | |
459 | sizeof(data->dasd_io_secs)); | |
460 | memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, | |
461 | sizeof(data->dasd_io_times)); | |
462 | memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, | |
463 | sizeof(data->dasd_io_timps)); | |
464 | memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, | |
465 | sizeof(data->dasd_io_time1)); | |
466 | memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, | |
467 | sizeof(data->dasd_io_time2)); | |
468 | memcpy(data->dasd_io_time2ps, | |
469 | block->profile.data->dasd_io_time2ps, | |
470 | sizeof(data->dasd_io_time2ps)); | |
471 | memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, | |
472 | sizeof(data->dasd_io_time3)); | |
473 | memcpy(data->dasd_io_nr_req, | |
474 | block->profile.data->dasd_io_nr_req, | |
475 | sizeof(data->dasd_io_nr_req)); | |
476 | spin_unlock_bh(&block->profile.lock); | |
477 | } else { | |
478 | spin_unlock_bh(&block->profile.lock); | |
ba465d83 JL |
479 | rc = -EIO; |
480 | goto out; | |
4fa52aa7 SW |
481 | } |
482 | if (copy_to_user(argp, data, sizeof(*data))) | |
ba465d83 JL |
483 | rc = -EFAULT; |
484 | out: | |
485 | kfree(data); | |
486 | return rc; | |
1da177e4 LT |
487 | } |
488 | #else | |
8e09f215 | 489 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 490 | { |
2267a0c8 | 491 | return -ENOTTY; |
1da177e4 LT |
492 | } |
493 | ||
8e09f215 | 494 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 495 | { |
2267a0c8 | 496 | return -ENOTTY; |
1da177e4 LT |
497 | } |
498 | #endif | |
499 | ||
500 | /* | |
501 | * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. | |
502 | */ | |
9353848c CH |
503 | static int __dasd_ioctl_information(struct dasd_block *block, |
504 | struct dasd_information2_t *dasd_info) | |
1da177e4 | 505 | { |
287a0933 SO |
506 | struct subchannel_id sch_id; |
507 | struct ccw_dev_id dev_id; | |
8e09f215 | 508 | struct dasd_device *base; |
1da177e4 | 509 | struct ccw_device *cdev; |
583d6535 | 510 | struct list_head *l; |
287a0933 SO |
511 | unsigned long flags; |
512 | int rc; | |
1da177e4 | 513 | |
8e09f215 | 514 | base = block->base; |
294001a8 | 515 | if (!base->discipline || !base->discipline->fill_info) |
1da177e4 LT |
516 | return -EINVAL; |
517 | ||
8e09f215 | 518 | rc = base->discipline->fill_info(base, dasd_info); |
9353848c | 519 | if (rc) |
1da177e4 | 520 | return rc; |
1da177e4 | 521 | |
8e09f215 | 522 | cdev = base->cdev; |
9a92fe48 | 523 | ccw_device_get_id(cdev, &dev_id); |
287a0933 | 524 | ccw_device_get_schid(cdev, &sch_id); |
1da177e4 | 525 | |
9a92fe48 | 526 | dasd_info->devno = dev_id.devno; |
287a0933 | 527 | dasd_info->schid = sch_id.sch_no; |
1da177e4 LT |
528 | dasd_info->cu_type = cdev->id.cu_type; |
529 | dasd_info->cu_model = cdev->id.cu_model; | |
530 | dasd_info->dev_type = cdev->id.dev_type; | |
531 | dasd_info->dev_model = cdev->id.dev_model; | |
8e09f215 | 532 | dasd_info->status = base->state; |
57467195 HH |
533 | /* |
534 | * The open_count is increased for every opener, that includes | |
535 | * the blkdev_get in dasd_scan_partitions. | |
536 | * This must be hidden from user-space. | |
537 | */ | |
8e09f215 SW |
538 | dasd_info->open_count = atomic_read(&block->open_count); |
539 | if (!block->bdev) | |
57467195 | 540 | dasd_info->open_count++; |
138c014d | 541 | |
1da177e4 LT |
542 | /* |
543 | * check if device is really formatted | |
544 | * LDL / CDL was returned by 'fill_info' | |
545 | */ | |
8e09f215 SW |
546 | if ((base->state < DASD_STATE_READY) || |
547 | (dasd_check_blocksize(block->bp_block))) | |
1da177e4 | 548 | dasd_info->format = DASD_FORMAT_NONE; |
f24acd45 | 549 | |
c6eb7b77 | 550 | dasd_info->features |= |
8e09f215 | 551 | ((base->features & DASD_FEATURE_READONLY) != 0); |
1da177e4 | 552 | |
294001a8 | 553 | memcpy(dasd_info->type, base->discipline->name, 4); |
554a826e | 554 | |
583d6535 JA |
555 | spin_lock_irqsave(&block->queue_lock, flags); |
556 | list_for_each(l, &base->ccw_queue) | |
557 | dasd_info->chanq_len++; | |
558 | spin_unlock_irqrestore(&block->queue_lock, flags); | |
9353848c CH |
559 | return 0; |
560 | } | |
1da177e4 | 561 | |
9353848c CH |
562 | static int dasd_ioctl_information(struct dasd_block *block, void __user *argp, |
563 | size_t copy_size) | |
564 | { | |
565 | struct dasd_information2_t *dasd_info; | |
566 | int error; | |
567 | ||
568 | dasd_info = kzalloc(sizeof(*dasd_info), GFP_KERNEL); | |
569 | if (!dasd_info) | |
570 | return -ENOMEM; | |
571 | ||
572 | error = __dasd_ioctl_information(block, dasd_info); | |
573 | if (!error && copy_to_user(argp, dasd_info, copy_size)) | |
574 | error = -EFAULT; | |
1da177e4 | 575 | kfree(dasd_info); |
9353848c | 576 | return error; |
1da177e4 LT |
577 | } |
578 | ||
579 | /* | |
580 | * Set read only | |
581 | */ | |
2c1b6ec1 | 582 | int dasd_set_read_only(struct block_device *bdev, bool ro) |
1da177e4 | 583 | { |
65f8da47 | 584 | struct dasd_device *base; |
2c1b6ec1 | 585 | int rc; |
1da177e4 | 586 | |
2c1b6ec1 | 587 | /* do not manipulate hardware state for partitions */ |
fa01b1e9 | 588 | if (bdev_is_partition(bdev)) |
2c1b6ec1 CH |
589 | return 0; |
590 | ||
65f8da47 SW |
591 | base = dasd_device_from_gendisk(bdev->bd_disk); |
592 | if (!base) | |
593 | return -ENODEV; | |
2c1b6ec1 CH |
594 | if (!ro && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) |
595 | rc = -EROFS; | |
596 | else | |
597 | rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, ro); | |
65f8da47 SW |
598 | dasd_put_device(base); |
599 | return rc; | |
1da177e4 LT |
600 | } |
601 | ||
8e09f215 | 602 | static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, |
88034865 | 603 | struct cmbdata __user *argp) |
8b2eb664 | 604 | { |
8b2eb664 CH |
605 | size_t size = _IOC_SIZE(cmd); |
606 | struct cmbdata data; | |
607 | int ret; | |
608 | ||
8e09f215 | 609 | ret = cmf_readall(block->base->cdev, &data); |
8b2eb664 CH |
610 | if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) |
611 | return -EFAULT; | |
612 | return ret; | |
613 | } | |
614 | ||
05bdb996 | 615 | int dasd_ioctl(struct block_device *bdev, blk_mode_t mode, |
cfdb00a7 | 616 | unsigned int cmd, unsigned long arg) |
1da177e4 | 617 | { |
65f8da47 SW |
618 | struct dasd_block *block; |
619 | struct dasd_device *base; | |
88034865 | 620 | void __user *argp; |
65f8da47 | 621 | int rc; |
88034865 HC |
622 | |
623 | if (is_compat_task()) | |
624 | argp = compat_ptr(arg); | |
625 | else | |
626 | argp = (void __user *)arg; | |
1da177e4 | 627 | |
1487f59a | 628 | if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) |
13c6204f | 629 | return -EINVAL; |
1da177e4 | 630 | |
65f8da47 SW |
631 | base = dasd_device_from_gendisk(bdev->bd_disk); |
632 | if (!base) | |
633 | return -ENODEV; | |
634 | block = base->block; | |
635 | rc = 0; | |
13c6204f CH |
636 | switch (cmd) { |
637 | case BIODASDDISABLE: | |
65f8da47 SW |
638 | rc = dasd_ioctl_disable(bdev); |
639 | break; | |
13c6204f | 640 | case BIODASDENABLE: |
65f8da47 SW |
641 | rc = dasd_ioctl_enable(bdev); |
642 | break; | |
13c6204f | 643 | case BIODASDQUIESCE: |
65f8da47 SW |
644 | rc = dasd_ioctl_quiesce(block); |
645 | break; | |
13c6204f | 646 | case BIODASDRESUME: |
65f8da47 SW |
647 | rc = dasd_ioctl_resume(block); |
648 | break; | |
5ea34a01 HR |
649 | case BIODASDABORTIO: |
650 | rc = dasd_ioctl_abortio(block); | |
651 | break; | |
652 | case BIODASDALLOWIO: | |
653 | rc = dasd_ioctl_allowio(block); | |
654 | break; | |
13c6204f | 655 | case BIODASDFMT: |
65f8da47 SW |
656 | rc = dasd_ioctl_format(bdev, argp); |
657 | break; | |
8fd57520 JH |
658 | case BIODASDCHECKFMT: |
659 | rc = dasd_ioctl_check_format(bdev, argp); | |
660 | break; | |
13c6204f | 661 | case BIODASDINFO: |
9353848c CH |
662 | rc = dasd_ioctl_information(block, argp, |
663 | sizeof(struct dasd_information_t)); | |
65f8da47 | 664 | break; |
13c6204f | 665 | case BIODASDINFO2: |
9353848c CH |
666 | rc = dasd_ioctl_information(block, argp, |
667 | sizeof(struct dasd_information2_t)); | |
65f8da47 | 668 | break; |
13c6204f | 669 | case BIODASDPRRD: |
65f8da47 SW |
670 | rc = dasd_ioctl_read_profile(block, argp); |
671 | break; | |
13c6204f | 672 | case BIODASDPRRST: |
65f8da47 SW |
673 | rc = dasd_ioctl_reset_profile(block); |
674 | break; | |
13c6204f | 675 | case DASDAPIVER: |
65f8da47 SW |
676 | rc = dasd_ioctl_api_version(argp); |
677 | break; | |
8b2eb664 | 678 | case BIODASDCMFENABLE: |
65f8da47 SW |
679 | rc = enable_cmf(base->cdev); |
680 | break; | |
8b2eb664 | 681 | case BIODASDCMFDISABLE: |
65f8da47 SW |
682 | rc = disable_cmf(base->cdev); |
683 | break; | |
8b2eb664 | 684 | case BIODASDREADALLCMB: |
65f8da47 SW |
685 | rc = dasd_ioctl_readall_cmb(block, cmd, argp); |
686 | break; | |
91dc4a19 JH |
687 | case BIODASDRAS: |
688 | rc = dasd_ioctl_release_space(bdev, argp); | |
689 | break; | |
112ff512 SH |
690 | case BIODASDCOPYPAIRSWAP: |
691 | rc = dasd_ioctl_copy_pair_swap(bdev, argp); | |
692 | break; | |
13c6204f | 693 | default: |
1107ccfb | 694 | /* if the discipline has an ioctl method try it. */ |
6b79d14e HC |
695 | rc = -ENOTTY; |
696 | if (base->discipline->ioctl) | |
65f8da47 | 697 | rc = base->discipline->ioctl(block, cmd, argp); |
13c6204f | 698 | } |
65f8da47 SW |
699 | dasd_put_device(base); |
700 | return rc; | |
1da177e4 | 701 | } |
26d7e28e SH |
702 | |
703 | ||
704 | /** | |
705 | * dasd_biodasdinfo() - fill out the dasd information structure | |
10c78e53 HC |
706 | * @disk: [in] pointer to gendisk structure that references a DASD |
707 | * @info: [out] pointer to the dasd_information2_t structure | |
26d7e28e SH |
708 | * |
709 | * Provide access to DASD specific information. | |
710 | * The gendisk structure is checked if it belongs to the DASD driver by | |
711 | * comparing the gendisk->fops pointer. | |
712 | * If it does not belong to the DASD driver -EINVAL is returned. | |
713 | * Otherwise the provided dasd_information2_t structure is filled out. | |
714 | * | |
715 | * Returns: | |
716 | * %0 on success and a negative error value on failure. | |
717 | */ | |
718 | int dasd_biodasdinfo(struct gendisk *disk, struct dasd_information2_t *info) | |
719 | { | |
720 | struct dasd_device *base; | |
721 | int error; | |
722 | ||
723 | if (disk->fops != &dasd_device_operations) | |
724 | return -EINVAL; | |
725 | ||
726 | base = dasd_device_from_gendisk(disk); | |
727 | if (!base) | |
728 | return -ENODEV; | |
729 | error = __dasd_ioctl_information(base->block, info); | |
730 | dasd_put_device(base); | |
731 | return error; | |
732 | } | |
733 | /* export that symbol_get in partition detection is possible */ | |
734 | EXPORT_SYMBOL_GPL(dasd_biodasdinfo); |