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> |
88034865 | 21 | #include <asm/compat.h> |
1da177e4 | 22 | #include <asm/ccwdev.h> |
287a0933 | 23 | #include <asm/schid.h> |
8b2eb664 | 24 | #include <asm/cmb.h> |
7c0f6ba6 | 25 | #include <linux/uaccess.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); | |
1da177e4 | 57 | /* Formatting the dasd device can change the capacity. */ |
c039e313 | 58 | mutex_lock(&bdev->bd_mutex); |
65f8da47 SW |
59 | i_size_write(bdev->bd_inode, |
60 | (loff_t)get_capacity(base->block->gdp) << 9); | |
c039e313 | 61 | mutex_unlock(&bdev->bd_mutex); |
65f8da47 | 62 | dasd_put_device(base); |
1da177e4 LT |
63 | return 0; |
64 | } | |
65 | ||
66 | /* | |
67 | * Disable device. | |
68 | * Used by dasdfmt. Disable I/O operations but allow ioctls. | |
69 | */ | |
70 | static int | |
13c6204f | 71 | dasd_ioctl_disable(struct block_device *bdev) |
1da177e4 | 72 | { |
65f8da47 | 73 | struct dasd_device *base; |
1da177e4 LT |
74 | |
75 | if (!capable(CAP_SYS_ADMIN)) | |
76 | return -EACCES; | |
13c6204f | 77 | |
65f8da47 SW |
78 | base = dasd_device_from_gendisk(bdev->bd_disk); |
79 | if (!base) | |
80 | return -ENODEV; | |
1da177e4 LT |
81 | /* |
82 | * Man this is sick. We don't do a real disable but only downgrade | |
83 | * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses | |
84 | * BIODASDDISABLE to disable accesses to the device via the block | |
85 | * device layer but it still wants to do i/o on the device by | |
86 | * using the BIODASDFMT ioctl. Therefore the correct state for the | |
87 | * device is DASD_STATE_BASIC that allows to do basic i/o. | |
88 | */ | |
65f8da47 | 89 | dasd_set_target_state(base, DASD_STATE_BASIC); |
1da177e4 LT |
90 | /* |
91 | * Set i_size to zero, since read, write, etc. check against this | |
92 | * value. | |
93 | */ | |
c039e313 | 94 | mutex_lock(&bdev->bd_mutex); |
1da177e4 | 95 | i_size_write(bdev->bd_inode, 0); |
c039e313 | 96 | mutex_unlock(&bdev->bd_mutex); |
65f8da47 | 97 | dasd_put_device(base); |
1da177e4 LT |
98 | return 0; |
99 | } | |
100 | ||
101 | /* | |
102 | * Quiesce device. | |
103 | */ | |
8e09f215 | 104 | static int dasd_ioctl_quiesce(struct dasd_block *block) |
1da177e4 | 105 | { |
1da177e4 | 106 | unsigned long flags; |
8e09f215 | 107 | struct dasd_device *base; |
138c014d | 108 | |
8e09f215 | 109 | base = block->base; |
1da177e4 LT |
110 | if (!capable (CAP_SYS_ADMIN)) |
111 | return -EACCES; | |
138c014d | 112 | |
ca99dab0 SH |
113 | pr_info("%s: The DASD has been put in the quiesce " |
114 | "state\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 115 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 116 | dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 117 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 LT |
118 | return 0; |
119 | } | |
120 | ||
121 | ||
122 | /* | |
fc19f381 | 123 | * Resume device. |
1da177e4 | 124 | */ |
8e09f215 | 125 | static int dasd_ioctl_resume(struct dasd_block *block) |
1da177e4 | 126 | { |
1da177e4 | 127 | unsigned long flags; |
8e09f215 | 128 | struct dasd_device *base; |
138c014d | 129 | |
8e09f215 | 130 | base = block->base; |
138c014d | 131 | if (!capable (CAP_SYS_ADMIN)) |
1da177e4 LT |
132 | return -EACCES; |
133 | ||
ca99dab0 SH |
134 | pr_info("%s: I/O operations have been resumed " |
135 | "on the DASD\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 136 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 137 | dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 138 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 | 139 | |
8e09f215 | 140 | dasd_schedule_block_bh(block); |
1da177e4 LT |
141 | return 0; |
142 | } | |
143 | ||
5ea34a01 HR |
144 | /* |
145 | * Abort all failfast I/O on a device. | |
146 | */ | |
147 | static int dasd_ioctl_abortio(struct dasd_block *block) | |
148 | { | |
149 | unsigned long flags; | |
150 | struct dasd_device *base; | |
151 | struct dasd_ccw_req *cqr, *n; | |
152 | ||
153 | base = block->base; | |
154 | if (!capable(CAP_SYS_ADMIN)) | |
155 | return -EACCES; | |
156 | ||
157 | if (test_and_set_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
158 | return 0; | |
159 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag set"); | |
160 | ||
161 | spin_lock_irqsave(&block->request_queue_lock, flags); | |
162 | spin_lock(&block->queue_lock); | |
163 | list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { | |
164 | if (test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && | |
165 | cqr->callback_data && | |
166 | cqr->callback_data != DASD_SLEEPON_START_TAG && | |
167 | cqr->callback_data != DASD_SLEEPON_END_TAG) { | |
168 | spin_unlock(&block->queue_lock); | |
169 | blk_abort_request(cqr->callback_data); | |
170 | spin_lock(&block->queue_lock); | |
171 | } | |
172 | } | |
173 | spin_unlock(&block->queue_lock); | |
174 | spin_unlock_irqrestore(&block->request_queue_lock, flags); | |
175 | ||
176 | dasd_schedule_block_bh(block); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Allow I/O on a device | |
182 | */ | |
183 | static int dasd_ioctl_allowio(struct dasd_block *block) | |
184 | { | |
185 | struct dasd_device *base; | |
186 | ||
187 | base = block->base; | |
188 | if (!capable(CAP_SYS_ADMIN)) | |
189 | return -EACCES; | |
190 | ||
191 | if (test_and_clear_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
192 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag unset"); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
1da177e4 LT |
197 | /* |
198 | * performs formatting of _device_ according to _fdata_ | |
199 | * Note: The discipline's format_function is assumed to deliver formatting | |
d42e1712 SH |
200 | * commands to format multiple units of the device. In terms of the ECKD |
201 | * devices this means CCWs are generated to format multiple tracks. | |
1da177e4 | 202 | */ |
d42e1712 SH |
203 | static int |
204 | dasd_format(struct dasd_block *block, struct format_data_t *fdata) | |
1da177e4 | 205 | { |
8e09f215 | 206 | struct dasd_device *base; |
8542885b | 207 | int rc; |
1da177e4 | 208 | |
8e09f215 SW |
209 | base = block->base; |
210 | if (base->discipline->format_device == NULL) | |
1da177e4 LT |
211 | return -EPERM; |
212 | ||
8e09f215 | 213 | if (base->state != DASD_STATE_BASIC) { |
d42e1712 SH |
214 | pr_warn("%s: The DASD cannot be formatted while it is enabled\n", |
215 | dev_name(&base->cdev->dev)); | |
1da177e4 LT |
216 | return -EBUSY; |
217 | } | |
218 | ||
8e09f215 | 219 | DBF_DEV_EVENT(DBF_NOTICE, base, |
b44b0ab3 | 220 | "formatting units %u to %u (%u B blocks) flags %u", |
1da177e4 LT |
221 | fdata->start_unit, |
222 | fdata->stop_unit, fdata->blksize, fdata->intensity); | |
223 | ||
224 | /* Since dasdfmt keeps the device open after it was disabled, | |
225 | * there still exists an inode for this device. | |
226 | * We must update i_blkbits, otherwise we might get errors when | |
227 | * enabling the device later. | |
228 | */ | |
229 | if (fdata->start_unit == 0) { | |
8e09f215 | 230 | struct block_device *bdev = bdget_disk(block->gdp, 0); |
1da177e4 LT |
231 | bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); |
232 | bdput(bdev); | |
233 | } | |
234 | ||
8542885b JH |
235 | rc = base->discipline->format_device(base, fdata, 1); |
236 | if (rc == -EAGAIN) | |
237 | rc = base->discipline->format_device(base, fdata, 0); | |
238 | ||
239 | return rc; | |
1da177e4 LT |
240 | } |
241 | ||
8fd57520 JH |
242 | static int dasd_check_format(struct dasd_block *block, |
243 | struct format_check_t *cdata) | |
244 | { | |
245 | struct dasd_device *base; | |
246 | int rc; | |
247 | ||
248 | base = block->base; | |
249 | if (!base->discipline->check_device_format) | |
250 | return -ENOTTY; | |
251 | ||
252 | rc = base->discipline->check_device_format(base, cdata, 1); | |
253 | if (rc == -EAGAIN) | |
254 | rc = base->discipline->check_device_format(base, cdata, 0); | |
255 | ||
256 | return rc; | |
257 | } | |
258 | ||
1da177e4 LT |
259 | /* |
260 | * Format device. | |
261 | */ | |
262 | static int | |
13c6204f | 263 | dasd_ioctl_format(struct block_device *bdev, void __user *argp) |
1da177e4 | 264 | { |
65f8da47 | 265 | struct dasd_device *base; |
1da177e4 | 266 | struct format_data_t fdata; |
65f8da47 | 267 | int rc; |
1da177e4 LT |
268 | |
269 | if (!capable(CAP_SYS_ADMIN)) | |
270 | return -EACCES; | |
13c6204f | 271 | if (!argp) |
1da177e4 | 272 | return -EINVAL; |
65f8da47 SW |
273 | base = dasd_device_from_gendisk(bdev->bd_disk); |
274 | if (!base) | |
275 | return -ENODEV; | |
276 | if (base->features & DASD_FEATURE_READONLY || | |
277 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
278 | dasd_put_device(base); | |
1da177e4 | 279 | return -EROFS; |
65f8da47 SW |
280 | } |
281 | if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { | |
282 | dasd_put_device(base); | |
1da177e4 | 283 | return -EFAULT; |
65f8da47 | 284 | } |
1da177e4 | 285 | if (bdev != bdev->bd_contains) { |
baebc70a JP |
286 | pr_warn("%s: The specified DASD is a partition and cannot be formatted\n", |
287 | dev_name(&base->cdev->dev)); | |
65f8da47 | 288 | dasd_put_device(base); |
1da177e4 LT |
289 | return -EINVAL; |
290 | } | |
65f8da47 SW |
291 | rc = dasd_format(base->block, &fdata); |
292 | dasd_put_device(base); | |
8fd57520 JH |
293 | |
294 | return rc; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Check device format | |
299 | */ | |
300 | static int dasd_ioctl_check_format(struct block_device *bdev, void __user *argp) | |
301 | { | |
302 | struct format_check_t cdata; | |
303 | struct dasd_device *base; | |
304 | int rc = 0; | |
305 | ||
306 | if (!argp) | |
307 | return -EINVAL; | |
308 | ||
309 | base = dasd_device_from_gendisk(bdev->bd_disk); | |
310 | if (!base) | |
311 | return -ENODEV; | |
312 | if (bdev != bdev->bd_contains) { | |
313 | pr_warn("%s: The specified DASD is a partition and cannot be checked\n", | |
314 | dev_name(&base->cdev->dev)); | |
315 | rc = -EINVAL; | |
316 | goto out_err; | |
317 | } | |
318 | ||
319 | if (copy_from_user(&cdata, argp, sizeof(cdata))) { | |
320 | rc = -EFAULT; | |
321 | goto out_err; | |
322 | } | |
323 | ||
324 | rc = dasd_check_format(base->block, &cdata); | |
325 | if (rc) | |
326 | goto out_err; | |
327 | ||
328 | if (copy_to_user(argp, &cdata, sizeof(cdata))) | |
329 | rc = -EFAULT; | |
330 | ||
331 | out_err: | |
332 | dasd_put_device(base); | |
333 | ||
65f8da47 | 334 | return rc; |
1da177e4 LT |
335 | } |
336 | ||
337 | #ifdef CONFIG_DASD_PROFILE | |
338 | /* | |
339 | * Reset device profile information | |
340 | */ | |
8e09f215 | 341 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 342 | { |
4fa52aa7 | 343 | dasd_profile_reset(&block->profile); |
1da177e4 LT |
344 | return 0; |
345 | } | |
346 | ||
347 | /* | |
348 | * Return device profile information | |
349 | */ | |
8e09f215 | 350 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 351 | { |
4fa52aa7 | 352 | struct dasd_profile_info_t *data; |
ba465d83 | 353 | int rc = 0; |
4fa52aa7 SW |
354 | |
355 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
356 | if (!data) | |
357 | return -ENOMEM; | |
358 | ||
359 | spin_lock_bh(&block->profile.lock); | |
360 | if (block->profile.data) { | |
361 | data->dasd_io_reqs = block->profile.data->dasd_io_reqs; | |
362 | data->dasd_io_sects = block->profile.data->dasd_io_sects; | |
363 | memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, | |
364 | sizeof(data->dasd_io_secs)); | |
365 | memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, | |
366 | sizeof(data->dasd_io_times)); | |
367 | memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, | |
368 | sizeof(data->dasd_io_timps)); | |
369 | memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, | |
370 | sizeof(data->dasd_io_time1)); | |
371 | memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, | |
372 | sizeof(data->dasd_io_time2)); | |
373 | memcpy(data->dasd_io_time2ps, | |
374 | block->profile.data->dasd_io_time2ps, | |
375 | sizeof(data->dasd_io_time2ps)); | |
376 | memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, | |
377 | sizeof(data->dasd_io_time3)); | |
378 | memcpy(data->dasd_io_nr_req, | |
379 | block->profile.data->dasd_io_nr_req, | |
380 | sizeof(data->dasd_io_nr_req)); | |
381 | spin_unlock_bh(&block->profile.lock); | |
382 | } else { | |
383 | spin_unlock_bh(&block->profile.lock); | |
ba465d83 JL |
384 | rc = -EIO; |
385 | goto out; | |
4fa52aa7 SW |
386 | } |
387 | if (copy_to_user(argp, data, sizeof(*data))) | |
ba465d83 JL |
388 | rc = -EFAULT; |
389 | out: | |
390 | kfree(data); | |
391 | return rc; | |
1da177e4 LT |
392 | } |
393 | #else | |
8e09f215 | 394 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 395 | { |
2267a0c8 | 396 | return -ENOTTY; |
1da177e4 LT |
397 | } |
398 | ||
8e09f215 | 399 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 400 | { |
2267a0c8 | 401 | return -ENOTTY; |
1da177e4 LT |
402 | } |
403 | #endif | |
404 | ||
405 | /* | |
406 | * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. | |
407 | */ | |
8e09f215 SW |
408 | static int dasd_ioctl_information(struct dasd_block *block, |
409 | unsigned int cmd, void __user *argp) | |
1da177e4 | 410 | { |
1da177e4 | 411 | struct dasd_information2_t *dasd_info; |
287a0933 SO |
412 | struct subchannel_id sch_id; |
413 | struct ccw_dev_id dev_id; | |
8e09f215 | 414 | struct dasd_device *base; |
1da177e4 | 415 | struct ccw_device *cdev; |
287a0933 SO |
416 | unsigned long flags; |
417 | int rc; | |
1da177e4 | 418 | |
8e09f215 | 419 | base = block->base; |
294001a8 | 420 | if (!base->discipline || !base->discipline->fill_info) |
1da177e4 LT |
421 | return -EINVAL; |
422 | ||
554a826e | 423 | dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); |
1da177e4 LT |
424 | if (dasd_info == NULL) |
425 | return -ENOMEM; | |
426 | ||
8e09f215 | 427 | rc = base->discipline->fill_info(base, dasd_info); |
1da177e4 LT |
428 | if (rc) { |
429 | kfree(dasd_info); | |
430 | return rc; | |
431 | } | |
432 | ||
8e09f215 | 433 | cdev = base->cdev; |
9a92fe48 | 434 | ccw_device_get_id(cdev, &dev_id); |
287a0933 | 435 | ccw_device_get_schid(cdev, &sch_id); |
1da177e4 | 436 | |
9a92fe48 | 437 | dasd_info->devno = dev_id.devno; |
287a0933 | 438 | dasd_info->schid = sch_id.sch_no; |
1da177e4 LT |
439 | dasd_info->cu_type = cdev->id.cu_type; |
440 | dasd_info->cu_model = cdev->id.cu_model; | |
441 | dasd_info->dev_type = cdev->id.dev_type; | |
442 | dasd_info->dev_model = cdev->id.dev_model; | |
8e09f215 | 443 | dasd_info->status = base->state; |
57467195 HH |
444 | /* |
445 | * The open_count is increased for every opener, that includes | |
446 | * the blkdev_get in dasd_scan_partitions. | |
447 | * This must be hidden from user-space. | |
448 | */ | |
8e09f215 SW |
449 | dasd_info->open_count = atomic_read(&block->open_count); |
450 | if (!block->bdev) | |
57467195 | 451 | dasd_info->open_count++; |
138c014d | 452 | |
1da177e4 LT |
453 | /* |
454 | * check if device is really formatted | |
455 | * LDL / CDL was returned by 'fill_info' | |
456 | */ | |
8e09f215 SW |
457 | if ((base->state < DASD_STATE_READY) || |
458 | (dasd_check_blocksize(block->bp_block))) | |
1da177e4 | 459 | dasd_info->format = DASD_FORMAT_NONE; |
f24acd45 | 460 | |
c6eb7b77 | 461 | dasd_info->features |= |
8e09f215 | 462 | ((base->features & DASD_FEATURE_READONLY) != 0); |
1da177e4 | 463 | |
294001a8 | 464 | memcpy(dasd_info->type, base->discipline->name, 4); |
554a826e | 465 | |
8e09f215 | 466 | if (block->request_queue->request_fn) { |
1da177e4 LT |
467 | struct list_head *l; |
468 | #ifdef DASD_EXTENDED_PROFILING | |
469 | { | |
470 | struct list_head *l; | |
8e09f215 SW |
471 | spin_lock_irqsave(&block->lock, flags); |
472 | list_for_each(l, &block->request_queue->queue_head) | |
1da177e4 | 473 | dasd_info->req_queue_len++; |
8e09f215 | 474 | spin_unlock_irqrestore(&block->lock, flags); |
1da177e4 LT |
475 | } |
476 | #endif /* DASD_EXTENDED_PROFILING */ | |
8e09f215 SW |
477 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
478 | list_for_each(l, &base->ccw_queue) | |
1da177e4 | 479 | dasd_info->chanq_len++; |
8e09f215 | 480 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), |
1da177e4 LT |
481 | flags); |
482 | } | |
483 | ||
484 | rc = 0; | |
13c6204f CH |
485 | if (copy_to_user(argp, dasd_info, |
486 | ((cmd == (unsigned int) BIODASDINFO2) ? | |
8e09f215 SW |
487 | sizeof(struct dasd_information2_t) : |
488 | sizeof(struct dasd_information_t)))) | |
1da177e4 LT |
489 | rc = -EFAULT; |
490 | kfree(dasd_info); | |
491 | return rc; | |
492 | } | |
493 | ||
494 | /* | |
495 | * Set read only | |
496 | */ | |
497 | static int | |
13c6204f | 498 | dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) |
1da177e4 | 499 | { |
65f8da47 SW |
500 | struct dasd_device *base; |
501 | int intval, rc; | |
1da177e4 LT |
502 | |
503 | if (!capable(CAP_SYS_ADMIN)) | |
504 | return -EACCES; | |
505 | if (bdev != bdev->bd_contains) | |
506 | // ro setting is not allowed for partitions | |
507 | return -EINVAL; | |
d2c993d8 | 508 | if (get_user(intval, (int __user *)argp)) |
1da177e4 | 509 | return -EFAULT; |
65f8da47 SW |
510 | base = dasd_device_from_gendisk(bdev->bd_disk); |
511 | if (!base) | |
512 | return -ENODEV; | |
513 | if (!intval && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
514 | dasd_put_device(base); | |
33b62a30 | 515 | return -EROFS; |
65f8da47 | 516 | } |
1da177e4 | 517 | set_disk_ro(bdev->bd_disk, intval); |
65f8da47 SW |
518 | rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, intval); |
519 | dasd_put_device(base); | |
520 | return rc; | |
1da177e4 LT |
521 | } |
522 | ||
8e09f215 | 523 | static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, |
88034865 | 524 | struct cmbdata __user *argp) |
8b2eb664 | 525 | { |
8b2eb664 CH |
526 | size_t size = _IOC_SIZE(cmd); |
527 | struct cmbdata data; | |
528 | int ret; | |
529 | ||
8e09f215 | 530 | ret = cmf_readall(block->base->cdev, &data); |
8b2eb664 CH |
531 | if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) |
532 | return -EFAULT; | |
533 | return ret; | |
534 | } | |
535 | ||
cfdb00a7 AB |
536 | int dasd_ioctl(struct block_device *bdev, fmode_t mode, |
537 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 538 | { |
65f8da47 SW |
539 | struct dasd_block *block; |
540 | struct dasd_device *base; | |
88034865 | 541 | void __user *argp; |
65f8da47 | 542 | int rc; |
88034865 HC |
543 | |
544 | if (is_compat_task()) | |
545 | argp = compat_ptr(arg); | |
546 | else | |
547 | argp = (void __user *)arg; | |
1da177e4 | 548 | |
13c6204f CH |
549 | if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { |
550 | PRINT_DEBUG("empty data ptr"); | |
551 | return -EINVAL; | |
552 | } | |
1da177e4 | 553 | |
65f8da47 SW |
554 | base = dasd_device_from_gendisk(bdev->bd_disk); |
555 | if (!base) | |
556 | return -ENODEV; | |
557 | block = base->block; | |
558 | rc = 0; | |
13c6204f CH |
559 | switch (cmd) { |
560 | case BIODASDDISABLE: | |
65f8da47 SW |
561 | rc = dasd_ioctl_disable(bdev); |
562 | break; | |
13c6204f | 563 | case BIODASDENABLE: |
65f8da47 SW |
564 | rc = dasd_ioctl_enable(bdev); |
565 | break; | |
13c6204f | 566 | case BIODASDQUIESCE: |
65f8da47 SW |
567 | rc = dasd_ioctl_quiesce(block); |
568 | break; | |
13c6204f | 569 | case BIODASDRESUME: |
65f8da47 SW |
570 | rc = dasd_ioctl_resume(block); |
571 | break; | |
5ea34a01 HR |
572 | case BIODASDABORTIO: |
573 | rc = dasd_ioctl_abortio(block); | |
574 | break; | |
575 | case BIODASDALLOWIO: | |
576 | rc = dasd_ioctl_allowio(block); | |
577 | break; | |
13c6204f | 578 | case BIODASDFMT: |
65f8da47 SW |
579 | rc = dasd_ioctl_format(bdev, argp); |
580 | break; | |
8fd57520 JH |
581 | case BIODASDCHECKFMT: |
582 | rc = dasd_ioctl_check_format(bdev, argp); | |
583 | break; | |
13c6204f | 584 | case BIODASDINFO: |
65f8da47 SW |
585 | rc = dasd_ioctl_information(block, cmd, argp); |
586 | break; | |
13c6204f | 587 | case BIODASDINFO2: |
65f8da47 SW |
588 | rc = dasd_ioctl_information(block, cmd, argp); |
589 | break; | |
13c6204f | 590 | case BIODASDPRRD: |
65f8da47 SW |
591 | rc = dasd_ioctl_read_profile(block, argp); |
592 | break; | |
13c6204f | 593 | case BIODASDPRRST: |
65f8da47 SW |
594 | rc = dasd_ioctl_reset_profile(block); |
595 | break; | |
13c6204f | 596 | case BLKROSET: |
65f8da47 SW |
597 | rc = dasd_ioctl_set_ro(bdev, argp); |
598 | break; | |
13c6204f | 599 | case DASDAPIVER: |
65f8da47 SW |
600 | rc = dasd_ioctl_api_version(argp); |
601 | break; | |
8b2eb664 | 602 | case BIODASDCMFENABLE: |
65f8da47 SW |
603 | rc = enable_cmf(base->cdev); |
604 | break; | |
8b2eb664 | 605 | case BIODASDCMFDISABLE: |
65f8da47 SW |
606 | rc = disable_cmf(base->cdev); |
607 | break; | |
8b2eb664 | 608 | case BIODASDREADALLCMB: |
65f8da47 SW |
609 | rc = dasd_ioctl_readall_cmb(block, cmd, argp); |
610 | break; | |
13c6204f | 611 | default: |
1107ccfb | 612 | /* if the discipline has an ioctl method try it. */ |
6b79d14e HC |
613 | rc = -ENOTTY; |
614 | if (base->discipline->ioctl) | |
65f8da47 | 615 | rc = base->discipline->ioctl(block, cmd, argp); |
13c6204f | 616 | } |
65f8da47 SW |
617 | dasd_put_device(base); |
618 | return rc; | |
1da177e4 | 619 | } |