Commit | Line | Data |
---|---|---|
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) { | |
8e09f215 | 223 | struct block_device *bdev = bdget_disk(block->gdp, 0); |
1da177e4 LT |
224 | bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); |
225 | bdput(bdev); | |
226 | } | |
227 | ||
8542885b JH |
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; | |
1da177e4 LT |
233 | } |
234 | ||
8fd57520 JH |
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 | ||
1da177e4 LT |
252 | /* |
253 | * Format device. | |
254 | */ | |
255 | static int | |
13c6204f | 256 | dasd_ioctl_format(struct block_device *bdev, void __user *argp) |
1da177e4 | 257 | { |
65f8da47 | 258 | struct dasd_device *base; |
1da177e4 | 259 | struct format_data_t fdata; |
65f8da47 | 260 | int rc; |
1da177e4 LT |
261 | |
262 | if (!capable(CAP_SYS_ADMIN)) | |
263 | return -EACCES; | |
13c6204f | 264 | if (!argp) |
1da177e4 | 265 | return -EINVAL; |
65f8da47 SW |
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(base); | |
1da177e4 | 272 | return -EROFS; |
65f8da47 SW |
273 | } |
274 | if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { | |
275 | dasd_put_device(base); | |
1da177e4 | 276 | return -EFAULT; |
65f8da47 | 277 | } |
fa01b1e9 | 278 | if (bdev_is_partition(bdev)) { |
baebc70a JP |
279 | pr_warn("%s: The specified DASD is a partition and cannot be formatted\n", |
280 | dev_name(&base->cdev->dev)); | |
65f8da47 | 281 | dasd_put_device(base); |
1da177e4 LT |
282 | return -EINVAL; |
283 | } | |
65f8da47 SW |
284 | rc = dasd_format(base->block, &fdata); |
285 | dasd_put_device(base); | |
8fd57520 JH |
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; | |
fa01b1e9 | 305 | if (bdev_is_partition(bdev)) { |
8fd57520 JH |
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(&cdata, argp, sizeof(cdata))) { | |
313 | rc = -EFAULT; | |
314 | goto out_err; | |
315 | } | |
316 | ||
317 | rc = dasd_check_format(base->block, &cdata); | |
318 | if (rc) | |
319 | goto out_err; | |
320 | ||
321 | if (copy_to_user(argp, &cdata, sizeof(cdata))) | |
322 | rc = -EFAULT; | |
323 | ||
324 | out_err: | |
325 | dasd_put_device(base); | |
326 | ||
65f8da47 | 327 | return rc; |
1da177e4 LT |
328 | } |
329 | ||
91dc4a19 JH |
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 | } | |
fa01b1e9 | 363 | if (bdev_is_partition(bdev)) { |
91dc4a19 JH |
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(&rdata, argp, sizeof(rdata))) { | |
371 | rc = -EFAULT; | |
372 | goto out_err; | |
373 | } | |
374 | ||
375 | rc = dasd_release_space(base, &rdata); | |
376 | ||
377 | out_err: | |
378 | dasd_put_device(base); | |
379 | ||
380 | return rc; | |
381 | } | |
382 | ||
1da177e4 LT |
383 | #ifdef CONFIG_DASD_PROFILE |
384 | /* | |
385 | * Reset device profile information | |
386 | */ | |
8e09f215 | 387 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 388 | { |
4fa52aa7 | 389 | dasd_profile_reset(&block->profile); |
1da177e4 LT |
390 | return 0; |
391 | } | |
392 | ||
393 | /* | |
394 | * Return device profile information | |
395 | */ | |
8e09f215 | 396 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 397 | { |
4fa52aa7 | 398 | struct dasd_profile_info_t *data; |
ba465d83 | 399 | int rc = 0; |
4fa52aa7 SW |
400 | |
401 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
402 | if (!data) | |
403 | return -ENOMEM; | |
404 | ||
405 | spin_lock_bh(&block->profile.lock); | |
406 | if (block->profile.data) { | |
407 | data->dasd_io_reqs = block->profile.data->dasd_io_reqs; | |
408 | data->dasd_io_sects = block->profile.data->dasd_io_sects; | |
409 | memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, | |
410 | sizeof(data->dasd_io_secs)); | |
411 | memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, | |
412 | sizeof(data->dasd_io_times)); | |
413 | memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, | |
414 | sizeof(data->dasd_io_timps)); | |
415 | memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, | |
416 | sizeof(data->dasd_io_time1)); | |
417 | memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, | |
418 | sizeof(data->dasd_io_time2)); | |
419 | memcpy(data->dasd_io_time2ps, | |
420 | block->profile.data->dasd_io_time2ps, | |
421 | sizeof(data->dasd_io_time2ps)); | |
422 | memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, | |
423 | sizeof(data->dasd_io_time3)); | |
424 | memcpy(data->dasd_io_nr_req, | |
425 | block->profile.data->dasd_io_nr_req, | |
426 | sizeof(data->dasd_io_nr_req)); | |
427 | spin_unlock_bh(&block->profile.lock); | |
428 | } else { | |
429 | spin_unlock_bh(&block->profile.lock); | |
ba465d83 JL |
430 | rc = -EIO; |
431 | goto out; | |
4fa52aa7 SW |
432 | } |
433 | if (copy_to_user(argp, data, sizeof(*data))) | |
ba465d83 JL |
434 | rc = -EFAULT; |
435 | out: | |
436 | kfree(data); | |
437 | return rc; | |
1da177e4 LT |
438 | } |
439 | #else | |
8e09f215 | 440 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 441 | { |
2267a0c8 | 442 | return -ENOTTY; |
1da177e4 LT |
443 | } |
444 | ||
8e09f215 | 445 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 446 | { |
2267a0c8 | 447 | return -ENOTTY; |
1da177e4 LT |
448 | } |
449 | #endif | |
450 | ||
451 | /* | |
452 | * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. | |
453 | */ | |
9353848c CH |
454 | static int __dasd_ioctl_information(struct dasd_block *block, |
455 | struct dasd_information2_t *dasd_info) | |
1da177e4 | 456 | { |
287a0933 SO |
457 | struct subchannel_id sch_id; |
458 | struct ccw_dev_id dev_id; | |
8e09f215 | 459 | struct dasd_device *base; |
1da177e4 | 460 | struct ccw_device *cdev; |
583d6535 | 461 | struct list_head *l; |
287a0933 SO |
462 | unsigned long flags; |
463 | int rc; | |
1da177e4 | 464 | |
8e09f215 | 465 | base = block->base; |
294001a8 | 466 | if (!base->discipline || !base->discipline->fill_info) |
1da177e4 LT |
467 | return -EINVAL; |
468 | ||
8e09f215 | 469 | rc = base->discipline->fill_info(base, dasd_info); |
9353848c | 470 | if (rc) |
1da177e4 | 471 | return rc; |
1da177e4 | 472 | |
8e09f215 | 473 | cdev = base->cdev; |
9a92fe48 | 474 | ccw_device_get_id(cdev, &dev_id); |
287a0933 | 475 | ccw_device_get_schid(cdev, &sch_id); |
1da177e4 | 476 | |
9a92fe48 | 477 | dasd_info->devno = dev_id.devno; |
287a0933 | 478 | dasd_info->schid = sch_id.sch_no; |
1da177e4 LT |
479 | dasd_info->cu_type = cdev->id.cu_type; |
480 | dasd_info->cu_model = cdev->id.cu_model; | |
481 | dasd_info->dev_type = cdev->id.dev_type; | |
482 | dasd_info->dev_model = cdev->id.dev_model; | |
8e09f215 | 483 | dasd_info->status = base->state; |
57467195 HH |
484 | /* |
485 | * The open_count is increased for every opener, that includes | |
486 | * the blkdev_get in dasd_scan_partitions. | |
487 | * This must be hidden from user-space. | |
488 | */ | |
8e09f215 SW |
489 | dasd_info->open_count = atomic_read(&block->open_count); |
490 | if (!block->bdev) | |
57467195 | 491 | dasd_info->open_count++; |
138c014d | 492 | |
1da177e4 LT |
493 | /* |
494 | * check if device is really formatted | |
495 | * LDL / CDL was returned by 'fill_info' | |
496 | */ | |
8e09f215 SW |
497 | if ((base->state < DASD_STATE_READY) || |
498 | (dasd_check_blocksize(block->bp_block))) | |
1da177e4 | 499 | dasd_info->format = DASD_FORMAT_NONE; |
f24acd45 | 500 | |
c6eb7b77 | 501 | dasd_info->features |= |
8e09f215 | 502 | ((base->features & DASD_FEATURE_READONLY) != 0); |
1da177e4 | 503 | |
294001a8 | 504 | memcpy(dasd_info->type, base->discipline->name, 4); |
554a826e | 505 | |
583d6535 JA |
506 | spin_lock_irqsave(&block->queue_lock, flags); |
507 | list_for_each(l, &base->ccw_queue) | |
508 | dasd_info->chanq_len++; | |
509 | spin_unlock_irqrestore(&block->queue_lock, flags); | |
9353848c CH |
510 | return 0; |
511 | } | |
1da177e4 | 512 | |
9353848c CH |
513 | static int dasd_ioctl_information(struct dasd_block *block, void __user *argp, |
514 | size_t copy_size) | |
515 | { | |
516 | struct dasd_information2_t *dasd_info; | |
517 | int error; | |
518 | ||
519 | dasd_info = kzalloc(sizeof(*dasd_info), GFP_KERNEL); | |
520 | if (!dasd_info) | |
521 | return -ENOMEM; | |
522 | ||
523 | error = __dasd_ioctl_information(block, dasd_info); | |
524 | if (!error && copy_to_user(argp, dasd_info, copy_size)) | |
525 | error = -EFAULT; | |
1da177e4 | 526 | kfree(dasd_info); |
9353848c | 527 | return error; |
1da177e4 LT |
528 | } |
529 | ||
530 | /* | |
531 | * Set read only | |
532 | */ | |
2c1b6ec1 | 533 | int dasd_set_read_only(struct block_device *bdev, bool ro) |
1da177e4 | 534 | { |
65f8da47 | 535 | struct dasd_device *base; |
2c1b6ec1 | 536 | int rc; |
1da177e4 | 537 | |
2c1b6ec1 | 538 | /* do not manipulate hardware state for partitions */ |
fa01b1e9 | 539 | if (bdev_is_partition(bdev)) |
2c1b6ec1 CH |
540 | return 0; |
541 | ||
65f8da47 SW |
542 | base = dasd_device_from_gendisk(bdev->bd_disk); |
543 | if (!base) | |
544 | return -ENODEV; | |
2c1b6ec1 CH |
545 | if (!ro && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) |
546 | rc = -EROFS; | |
547 | else | |
548 | rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, ro); | |
65f8da47 SW |
549 | dasd_put_device(base); |
550 | return rc; | |
1da177e4 LT |
551 | } |
552 | ||
8e09f215 | 553 | static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, |
88034865 | 554 | struct cmbdata __user *argp) |
8b2eb664 | 555 | { |
8b2eb664 CH |
556 | size_t size = _IOC_SIZE(cmd); |
557 | struct cmbdata data; | |
558 | int ret; | |
559 | ||
8e09f215 | 560 | ret = cmf_readall(block->base->cdev, &data); |
8b2eb664 CH |
561 | if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) |
562 | return -EFAULT; | |
563 | return ret; | |
564 | } | |
565 | ||
cfdb00a7 AB |
566 | int dasd_ioctl(struct block_device *bdev, fmode_t mode, |
567 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 568 | { |
65f8da47 SW |
569 | struct dasd_block *block; |
570 | struct dasd_device *base; | |
88034865 | 571 | void __user *argp; |
65f8da47 | 572 | int rc; |
88034865 HC |
573 | |
574 | if (is_compat_task()) | |
575 | argp = compat_ptr(arg); | |
576 | else | |
577 | argp = (void __user *)arg; | |
1da177e4 | 578 | |
13c6204f CH |
579 | if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { |
580 | PRINT_DEBUG("empty data ptr"); | |
581 | return -EINVAL; | |
582 | } | |
1da177e4 | 583 | |
65f8da47 SW |
584 | base = dasd_device_from_gendisk(bdev->bd_disk); |
585 | if (!base) | |
586 | return -ENODEV; | |
587 | block = base->block; | |
588 | rc = 0; | |
13c6204f CH |
589 | switch (cmd) { |
590 | case BIODASDDISABLE: | |
65f8da47 SW |
591 | rc = dasd_ioctl_disable(bdev); |
592 | break; | |
13c6204f | 593 | case BIODASDENABLE: |
65f8da47 SW |
594 | rc = dasd_ioctl_enable(bdev); |
595 | break; | |
13c6204f | 596 | case BIODASDQUIESCE: |
65f8da47 SW |
597 | rc = dasd_ioctl_quiesce(block); |
598 | break; | |
13c6204f | 599 | case BIODASDRESUME: |
65f8da47 SW |
600 | rc = dasd_ioctl_resume(block); |
601 | break; | |
5ea34a01 HR |
602 | case BIODASDABORTIO: |
603 | rc = dasd_ioctl_abortio(block); | |
604 | break; | |
605 | case BIODASDALLOWIO: | |
606 | rc = dasd_ioctl_allowio(block); | |
607 | break; | |
13c6204f | 608 | case BIODASDFMT: |
65f8da47 SW |
609 | rc = dasd_ioctl_format(bdev, argp); |
610 | break; | |
8fd57520 JH |
611 | case BIODASDCHECKFMT: |
612 | rc = dasd_ioctl_check_format(bdev, argp); | |
613 | break; | |
13c6204f | 614 | case BIODASDINFO: |
9353848c CH |
615 | rc = dasd_ioctl_information(block, argp, |
616 | sizeof(struct dasd_information_t)); | |
65f8da47 | 617 | break; |
13c6204f | 618 | case BIODASDINFO2: |
9353848c CH |
619 | rc = dasd_ioctl_information(block, argp, |
620 | sizeof(struct dasd_information2_t)); | |
65f8da47 | 621 | break; |
13c6204f | 622 | case BIODASDPRRD: |
65f8da47 SW |
623 | rc = dasd_ioctl_read_profile(block, argp); |
624 | break; | |
13c6204f | 625 | case BIODASDPRRST: |
65f8da47 SW |
626 | rc = dasd_ioctl_reset_profile(block); |
627 | break; | |
13c6204f | 628 | case DASDAPIVER: |
65f8da47 SW |
629 | rc = dasd_ioctl_api_version(argp); |
630 | break; | |
8b2eb664 | 631 | case BIODASDCMFENABLE: |
65f8da47 SW |
632 | rc = enable_cmf(base->cdev); |
633 | break; | |
8b2eb664 | 634 | case BIODASDCMFDISABLE: |
65f8da47 SW |
635 | rc = disable_cmf(base->cdev); |
636 | break; | |
8b2eb664 | 637 | case BIODASDREADALLCMB: |
65f8da47 SW |
638 | rc = dasd_ioctl_readall_cmb(block, cmd, argp); |
639 | break; | |
91dc4a19 JH |
640 | case BIODASDRAS: |
641 | rc = dasd_ioctl_release_space(bdev, argp); | |
642 | break; | |
13c6204f | 643 | default: |
1107ccfb | 644 | /* if the discipline has an ioctl method try it. */ |
6b79d14e HC |
645 | rc = -ENOTTY; |
646 | if (base->discipline->ioctl) | |
65f8da47 | 647 | rc = base->discipline->ioctl(block, cmd, argp); |
13c6204f | 648 | } |
65f8da47 SW |
649 | dasd_put_device(base); |
650 | return rc; | |
1da177e4 | 651 | } |
26d7e28e SH |
652 | |
653 | ||
654 | /** | |
655 | * dasd_biodasdinfo() - fill out the dasd information structure | |
656 | * @disk [in]: pointer to gendisk structure that references a DASD | |
657 | * @info [out]: pointer to the dasd_information2_t structure | |
658 | * | |
659 | * Provide access to DASD specific information. | |
660 | * The gendisk structure is checked if it belongs to the DASD driver by | |
661 | * comparing the gendisk->fops pointer. | |
662 | * If it does not belong to the DASD driver -EINVAL is returned. | |
663 | * Otherwise the provided dasd_information2_t structure is filled out. | |
664 | * | |
665 | * Returns: | |
666 | * %0 on success and a negative error value on failure. | |
667 | */ | |
668 | int dasd_biodasdinfo(struct gendisk *disk, struct dasd_information2_t *info) | |
669 | { | |
670 | struct dasd_device *base; | |
671 | int error; | |
672 | ||
673 | if (disk->fops != &dasd_device_operations) | |
674 | return -EINVAL; | |
675 | ||
676 | base = dasd_device_from_gendisk(disk); | |
677 | if (!base) | |
678 | return -ENODEV; | |
679 | error = __dasd_ioctl_information(base->block, info); | |
680 | dasd_put_device(base); | |
681 | return error; | |
682 | } | |
683 | /* export that symbol_get in partition detection is possible */ | |
684 | EXPORT_SYMBOL_GPL(dasd_biodasdinfo); |