Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
3 | * Horst Hummel <Horst.Hummel@de.ibm.com> | |
4 | * Carsten Otte <Cotte@de.ibm.com> | |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
a53c8fab | 7 | * Copyright IBM Corp. 1999, 2001 |
1da177e4 LT |
8 | * |
9 | * i/o controls for the dasd driver. | |
10 | */ | |
fc19f381 SH |
11 | |
12 | #define KMSG_COMPONENT "dasd" | |
13 | ||
1da177e4 | 14 | #include <linux/interrupt.h> |
048cd4e5 | 15 | #include <linux/compat.h> |
1da177e4 LT |
16 | #include <linux/major.h> |
17 | #include <linux/fs.h> | |
18 | #include <linux/blkpg.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
88034865 | 20 | #include <asm/compat.h> |
1da177e4 | 21 | #include <asm/ccwdev.h> |
287a0933 | 22 | #include <asm/schid.h> |
8b2eb664 | 23 | #include <asm/cmb.h> |
1da177e4 LT |
24 | #include <asm/uaccess.h> |
25 | ||
26 | /* This is ugly... */ | |
27 | #define PRINTK_HEADER "dasd_ioctl:" | |
28 | ||
29 | #include "dasd_int.h" | |
30 | ||
1da177e4 | 31 | |
1da177e4 | 32 | static int |
13c6204f | 33 | dasd_ioctl_api_version(void __user *argp) |
1da177e4 LT |
34 | { |
35 | int ver = DASD_API_VERSION; | |
b5029622 | 36 | return put_user(ver, (int __user *)argp); |
1da177e4 LT |
37 | } |
38 | ||
39 | /* | |
40 | * Enable device. | |
41 | * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection | |
42 | */ | |
43 | static int | |
13c6204f | 44 | dasd_ioctl_enable(struct block_device *bdev) |
1da177e4 | 45 | { |
65f8da47 | 46 | struct dasd_device *base; |
1da177e4 LT |
47 | |
48 | if (!capable(CAP_SYS_ADMIN)) | |
49 | return -EACCES; | |
13c6204f | 50 | |
65f8da47 SW |
51 | base = dasd_device_from_gendisk(bdev->bd_disk); |
52 | if (!base) | |
53 | return -ENODEV; | |
54 | ||
55 | dasd_enable_device(base); | |
1da177e4 | 56 | /* Formatting the dasd device can change the capacity. */ |
c039e313 | 57 | mutex_lock(&bdev->bd_mutex); |
65f8da47 SW |
58 | i_size_write(bdev->bd_inode, |
59 | (loff_t)get_capacity(base->block->gdp) << 9); | |
c039e313 | 60 | mutex_unlock(&bdev->bd_mutex); |
65f8da47 | 61 | dasd_put_device(base); |
1da177e4 LT |
62 | return 0; |
63 | } | |
64 | ||
65 | /* | |
66 | * Disable device. | |
67 | * Used by dasdfmt. Disable I/O operations but allow ioctls. | |
68 | */ | |
69 | static int | |
13c6204f | 70 | dasd_ioctl_disable(struct block_device *bdev) |
1da177e4 | 71 | { |
65f8da47 | 72 | struct dasd_device *base; |
1da177e4 LT |
73 | |
74 | if (!capable(CAP_SYS_ADMIN)) | |
75 | return -EACCES; | |
13c6204f | 76 | |
65f8da47 SW |
77 | base = dasd_device_from_gendisk(bdev->bd_disk); |
78 | if (!base) | |
79 | return -ENODEV; | |
1da177e4 LT |
80 | /* |
81 | * Man this is sick. We don't do a real disable but only downgrade | |
82 | * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses | |
83 | * BIODASDDISABLE to disable accesses to the device via the block | |
84 | * device layer but it still wants to do i/o on the device by | |
85 | * using the BIODASDFMT ioctl. Therefore the correct state for the | |
86 | * device is DASD_STATE_BASIC that allows to do basic i/o. | |
87 | */ | |
65f8da47 | 88 | dasd_set_target_state(base, DASD_STATE_BASIC); |
1da177e4 LT |
89 | /* |
90 | * Set i_size to zero, since read, write, etc. check against this | |
91 | * value. | |
92 | */ | |
c039e313 | 93 | mutex_lock(&bdev->bd_mutex); |
1da177e4 | 94 | i_size_write(bdev->bd_inode, 0); |
c039e313 | 95 | mutex_unlock(&bdev->bd_mutex); |
65f8da47 | 96 | dasd_put_device(base); |
1da177e4 LT |
97 | return 0; |
98 | } | |
99 | ||
100 | /* | |
101 | * Quiesce device. | |
102 | */ | |
8e09f215 | 103 | static int dasd_ioctl_quiesce(struct dasd_block *block) |
1da177e4 | 104 | { |
1da177e4 | 105 | unsigned long flags; |
8e09f215 | 106 | struct dasd_device *base; |
138c014d | 107 | |
8e09f215 | 108 | base = block->base; |
1da177e4 LT |
109 | if (!capable (CAP_SYS_ADMIN)) |
110 | return -EACCES; | |
138c014d | 111 | |
ca99dab0 SH |
112 | pr_info("%s: The DASD has been put in the quiesce " |
113 | "state\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 114 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 115 | dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 116 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 LT |
117 | return 0; |
118 | } | |
119 | ||
120 | ||
121 | /* | |
fc19f381 | 122 | * Resume device. |
1da177e4 | 123 | */ |
8e09f215 | 124 | static int dasd_ioctl_resume(struct dasd_block *block) |
1da177e4 | 125 | { |
1da177e4 | 126 | unsigned long flags; |
8e09f215 | 127 | struct dasd_device *base; |
138c014d | 128 | |
8e09f215 | 129 | base = block->base; |
138c014d | 130 | if (!capable (CAP_SYS_ADMIN)) |
1da177e4 LT |
131 | return -EACCES; |
132 | ||
ca99dab0 SH |
133 | pr_info("%s: I/O operations have been resumed " |
134 | "on the DASD\n", dev_name(&base->cdev->dev)); | |
8e09f215 | 135 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
eb6e199b | 136 | dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); |
8e09f215 | 137 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); |
1da177e4 | 138 | |
8e09f215 | 139 | dasd_schedule_block_bh(block); |
1da177e4 LT |
140 | return 0; |
141 | } | |
142 | ||
5ea34a01 HR |
143 | /* |
144 | * Abort all failfast I/O on a device. | |
145 | */ | |
146 | static int dasd_ioctl_abortio(struct dasd_block *block) | |
147 | { | |
148 | unsigned long flags; | |
149 | struct dasd_device *base; | |
150 | struct dasd_ccw_req *cqr, *n; | |
151 | ||
152 | base = block->base; | |
153 | if (!capable(CAP_SYS_ADMIN)) | |
154 | return -EACCES; | |
155 | ||
156 | if (test_and_set_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
157 | return 0; | |
158 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag set"); | |
159 | ||
160 | spin_lock_irqsave(&block->request_queue_lock, flags); | |
161 | spin_lock(&block->queue_lock); | |
162 | list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { | |
163 | if (test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && | |
164 | cqr->callback_data && | |
165 | cqr->callback_data != DASD_SLEEPON_START_TAG && | |
166 | cqr->callback_data != DASD_SLEEPON_END_TAG) { | |
167 | spin_unlock(&block->queue_lock); | |
168 | blk_abort_request(cqr->callback_data); | |
169 | spin_lock(&block->queue_lock); | |
170 | } | |
171 | } | |
172 | spin_unlock(&block->queue_lock); | |
173 | spin_unlock_irqrestore(&block->request_queue_lock, flags); | |
174 | ||
175 | dasd_schedule_block_bh(block); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Allow I/O on a device | |
181 | */ | |
182 | static int dasd_ioctl_allowio(struct dasd_block *block) | |
183 | { | |
184 | struct dasd_device *base; | |
185 | ||
186 | base = block->base; | |
187 | if (!capable(CAP_SYS_ADMIN)) | |
188 | return -EACCES; | |
189 | ||
190 | if (test_and_clear_bit(DASD_FLAG_ABORTALL, &base->flags)) | |
191 | DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag unset"); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
1da177e4 LT |
196 | /* |
197 | * performs formatting of _device_ according to _fdata_ | |
198 | * Note: The discipline's format_function is assumed to deliver formatting | |
d42e1712 SH |
199 | * commands to format multiple units of the device. In terms of the ECKD |
200 | * devices this means CCWs are generated to format multiple tracks. | |
1da177e4 | 201 | */ |
d42e1712 SH |
202 | static int |
203 | dasd_format(struct dasd_block *block, struct format_data_t *fdata) | |
1da177e4 | 204 | { |
8e09f215 | 205 | struct dasd_device *base; |
a94fa154 | 206 | int enable_pav = 1; |
29b8dd9d SH |
207 | int rc, retries; |
208 | int start, stop; | |
1da177e4 | 209 | |
8e09f215 SW |
210 | base = block->base; |
211 | if (base->discipline->format_device == NULL) | |
1da177e4 LT |
212 | return -EPERM; |
213 | ||
8e09f215 | 214 | if (base->state != DASD_STATE_BASIC) { |
d42e1712 SH |
215 | pr_warn("%s: The DASD cannot be formatted while it is enabled\n", |
216 | dev_name(&base->cdev->dev)); | |
1da177e4 LT |
217 | return -EBUSY; |
218 | } | |
219 | ||
8e09f215 | 220 | DBF_DEV_EVENT(DBF_NOTICE, base, |
b44b0ab3 | 221 | "formatting units %u to %u (%u B blocks) flags %u", |
1da177e4 LT |
222 | fdata->start_unit, |
223 | fdata->stop_unit, fdata->blksize, fdata->intensity); | |
224 | ||
225 | /* Since dasdfmt keeps the device open after it was disabled, | |
226 | * there still exists an inode for this device. | |
227 | * We must update i_blkbits, otherwise we might get errors when | |
228 | * enabling the device later. | |
229 | */ | |
230 | if (fdata->start_unit == 0) { | |
8e09f215 | 231 | struct block_device *bdev = bdget_disk(block->gdp, 0); |
1da177e4 LT |
232 | bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); |
233 | bdput(bdev); | |
234 | } | |
235 | ||
29b8dd9d SH |
236 | retries = 255; |
237 | /* backup start- and endtrack for retries */ | |
238 | start = fdata->start_unit; | |
239 | stop = fdata->stop_unit; | |
240 | do { | |
a94fa154 | 241 | rc = base->discipline->format_device(base, fdata, enable_pav); |
29b8dd9d SH |
242 | if (rc) { |
243 | if (rc == -EAGAIN) { | |
244 | retries--; | |
245 | /* disable PAV in case of errors */ | |
a94fa154 | 246 | enable_pav = 0; |
29b8dd9d SH |
247 | fdata->start_unit = start; |
248 | fdata->stop_unit = stop; | |
249 | } else | |
250 | return rc; | |
251 | } else | |
252 | /* success */ | |
253 | break; | |
254 | } while (retries); | |
255 | ||
256 | if (!retries) | |
257 | return -EIO; | |
258 | else | |
259 | return 0; | |
1da177e4 LT |
260 | } |
261 | ||
262 | /* | |
263 | * Format device. | |
264 | */ | |
265 | static int | |
13c6204f | 266 | dasd_ioctl_format(struct block_device *bdev, void __user *argp) |
1da177e4 | 267 | { |
65f8da47 | 268 | struct dasd_device *base; |
1da177e4 | 269 | struct format_data_t fdata; |
65f8da47 | 270 | int rc; |
1da177e4 LT |
271 | |
272 | if (!capable(CAP_SYS_ADMIN)) | |
273 | return -EACCES; | |
13c6204f | 274 | if (!argp) |
1da177e4 | 275 | return -EINVAL; |
65f8da47 SW |
276 | base = dasd_device_from_gendisk(bdev->bd_disk); |
277 | if (!base) | |
278 | return -ENODEV; | |
279 | if (base->features & DASD_FEATURE_READONLY || | |
280 | test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
281 | dasd_put_device(base); | |
1da177e4 | 282 | return -EROFS; |
65f8da47 SW |
283 | } |
284 | if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { | |
285 | dasd_put_device(base); | |
1da177e4 | 286 | return -EFAULT; |
65f8da47 | 287 | } |
1da177e4 | 288 | if (bdev != bdev->bd_contains) { |
ca99dab0 SH |
289 | pr_warning("%s: The specified DASD is a partition and cannot " |
290 | "be formatted\n", | |
65f8da47 SW |
291 | dev_name(&base->cdev->dev)); |
292 | dasd_put_device(base); | |
1da177e4 LT |
293 | return -EINVAL; |
294 | } | |
65f8da47 SW |
295 | rc = dasd_format(base->block, &fdata); |
296 | dasd_put_device(base); | |
297 | return rc; | |
1da177e4 LT |
298 | } |
299 | ||
300 | #ifdef CONFIG_DASD_PROFILE | |
301 | /* | |
302 | * Reset device profile information | |
303 | */ | |
8e09f215 | 304 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 305 | { |
4fa52aa7 | 306 | dasd_profile_reset(&block->profile); |
1da177e4 LT |
307 | return 0; |
308 | } | |
309 | ||
310 | /* | |
311 | * Return device profile information | |
312 | */ | |
8e09f215 | 313 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 314 | { |
4fa52aa7 | 315 | struct dasd_profile_info_t *data; |
ba465d83 | 316 | int rc = 0; |
4fa52aa7 SW |
317 | |
318 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
319 | if (!data) | |
320 | return -ENOMEM; | |
321 | ||
322 | spin_lock_bh(&block->profile.lock); | |
323 | if (block->profile.data) { | |
324 | data->dasd_io_reqs = block->profile.data->dasd_io_reqs; | |
325 | data->dasd_io_sects = block->profile.data->dasd_io_sects; | |
326 | memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, | |
327 | sizeof(data->dasd_io_secs)); | |
328 | memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, | |
329 | sizeof(data->dasd_io_times)); | |
330 | memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, | |
331 | sizeof(data->dasd_io_timps)); | |
332 | memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, | |
333 | sizeof(data->dasd_io_time1)); | |
334 | memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, | |
335 | sizeof(data->dasd_io_time2)); | |
336 | memcpy(data->dasd_io_time2ps, | |
337 | block->profile.data->dasd_io_time2ps, | |
338 | sizeof(data->dasd_io_time2ps)); | |
339 | memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, | |
340 | sizeof(data->dasd_io_time3)); | |
341 | memcpy(data->dasd_io_nr_req, | |
342 | block->profile.data->dasd_io_nr_req, | |
343 | sizeof(data->dasd_io_nr_req)); | |
344 | spin_unlock_bh(&block->profile.lock); | |
345 | } else { | |
346 | spin_unlock_bh(&block->profile.lock); | |
ba465d83 JL |
347 | rc = -EIO; |
348 | goto out; | |
4fa52aa7 SW |
349 | } |
350 | if (copy_to_user(argp, data, sizeof(*data))) | |
ba465d83 JL |
351 | rc = -EFAULT; |
352 | out: | |
353 | kfree(data); | |
354 | return rc; | |
1da177e4 LT |
355 | } |
356 | #else | |
8e09f215 | 357 | static int dasd_ioctl_reset_profile(struct dasd_block *block) |
1da177e4 | 358 | { |
2267a0c8 | 359 | return -ENOTTY; |
1da177e4 LT |
360 | } |
361 | ||
8e09f215 | 362 | static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) |
1da177e4 | 363 | { |
2267a0c8 | 364 | return -ENOTTY; |
1da177e4 LT |
365 | } |
366 | #endif | |
367 | ||
368 | /* | |
369 | * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. | |
370 | */ | |
8e09f215 SW |
371 | static int dasd_ioctl_information(struct dasd_block *block, |
372 | unsigned int cmd, void __user *argp) | |
1da177e4 | 373 | { |
1da177e4 | 374 | struct dasd_information2_t *dasd_info; |
287a0933 SO |
375 | struct subchannel_id sch_id; |
376 | struct ccw_dev_id dev_id; | |
8e09f215 | 377 | struct dasd_device *base; |
1da177e4 | 378 | struct ccw_device *cdev; |
287a0933 SO |
379 | unsigned long flags; |
380 | int rc; | |
1da177e4 | 381 | |
8e09f215 | 382 | base = block->base; |
294001a8 | 383 | if (!base->discipline || !base->discipline->fill_info) |
1da177e4 LT |
384 | return -EINVAL; |
385 | ||
554a826e | 386 | dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); |
1da177e4 LT |
387 | if (dasd_info == NULL) |
388 | return -ENOMEM; | |
389 | ||
8e09f215 | 390 | rc = base->discipline->fill_info(base, dasd_info); |
1da177e4 LT |
391 | if (rc) { |
392 | kfree(dasd_info); | |
393 | return rc; | |
394 | } | |
395 | ||
8e09f215 | 396 | cdev = base->cdev; |
9a92fe48 | 397 | ccw_device_get_id(cdev, &dev_id); |
287a0933 | 398 | ccw_device_get_schid(cdev, &sch_id); |
1da177e4 | 399 | |
9a92fe48 | 400 | dasd_info->devno = dev_id.devno; |
287a0933 | 401 | dasd_info->schid = sch_id.sch_no; |
1da177e4 LT |
402 | dasd_info->cu_type = cdev->id.cu_type; |
403 | dasd_info->cu_model = cdev->id.cu_model; | |
404 | dasd_info->dev_type = cdev->id.dev_type; | |
405 | dasd_info->dev_model = cdev->id.dev_model; | |
8e09f215 | 406 | dasd_info->status = base->state; |
57467195 HH |
407 | /* |
408 | * The open_count is increased for every opener, that includes | |
409 | * the blkdev_get in dasd_scan_partitions. | |
410 | * This must be hidden from user-space. | |
411 | */ | |
8e09f215 SW |
412 | dasd_info->open_count = atomic_read(&block->open_count); |
413 | if (!block->bdev) | |
57467195 | 414 | dasd_info->open_count++; |
138c014d | 415 | |
1da177e4 LT |
416 | /* |
417 | * check if device is really formatted | |
418 | * LDL / CDL was returned by 'fill_info' | |
419 | */ | |
8e09f215 SW |
420 | if ((base->state < DASD_STATE_READY) || |
421 | (dasd_check_blocksize(block->bp_block))) | |
1da177e4 | 422 | dasd_info->format = DASD_FORMAT_NONE; |
f24acd45 | 423 | |
c6eb7b77 | 424 | dasd_info->features |= |
8e09f215 | 425 | ((base->features & DASD_FEATURE_READONLY) != 0); |
1da177e4 | 426 | |
294001a8 | 427 | memcpy(dasd_info->type, base->discipline->name, 4); |
554a826e | 428 | |
8e09f215 | 429 | if (block->request_queue->request_fn) { |
1da177e4 LT |
430 | struct list_head *l; |
431 | #ifdef DASD_EXTENDED_PROFILING | |
432 | { | |
433 | struct list_head *l; | |
8e09f215 SW |
434 | spin_lock_irqsave(&block->lock, flags); |
435 | list_for_each(l, &block->request_queue->queue_head) | |
1da177e4 | 436 | dasd_info->req_queue_len++; |
8e09f215 | 437 | spin_unlock_irqrestore(&block->lock, flags); |
1da177e4 LT |
438 | } |
439 | #endif /* DASD_EXTENDED_PROFILING */ | |
8e09f215 SW |
440 | spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); |
441 | list_for_each(l, &base->ccw_queue) | |
1da177e4 | 442 | dasd_info->chanq_len++; |
8e09f215 | 443 | spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), |
1da177e4 LT |
444 | flags); |
445 | } | |
446 | ||
447 | rc = 0; | |
13c6204f CH |
448 | if (copy_to_user(argp, dasd_info, |
449 | ((cmd == (unsigned int) BIODASDINFO2) ? | |
8e09f215 SW |
450 | sizeof(struct dasd_information2_t) : |
451 | sizeof(struct dasd_information_t)))) | |
1da177e4 LT |
452 | rc = -EFAULT; |
453 | kfree(dasd_info); | |
454 | return rc; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Set read only | |
459 | */ | |
460 | static int | |
13c6204f | 461 | dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) |
1da177e4 | 462 | { |
65f8da47 SW |
463 | struct dasd_device *base; |
464 | int intval, rc; | |
1da177e4 LT |
465 | |
466 | if (!capable(CAP_SYS_ADMIN)) | |
467 | return -EACCES; | |
468 | if (bdev != bdev->bd_contains) | |
469 | // ro setting is not allowed for partitions | |
470 | return -EINVAL; | |
d2c993d8 | 471 | if (get_user(intval, (int __user *)argp)) |
1da177e4 | 472 | return -EFAULT; |
65f8da47 SW |
473 | base = dasd_device_from_gendisk(bdev->bd_disk); |
474 | if (!base) | |
475 | return -ENODEV; | |
476 | if (!intval && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { | |
477 | dasd_put_device(base); | |
33b62a30 | 478 | return -EROFS; |
65f8da47 | 479 | } |
1da177e4 | 480 | set_disk_ro(bdev->bd_disk, intval); |
65f8da47 SW |
481 | rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, intval); |
482 | dasd_put_device(base); | |
483 | return rc; | |
1da177e4 LT |
484 | } |
485 | ||
8e09f215 | 486 | static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, |
88034865 | 487 | struct cmbdata __user *argp) |
8b2eb664 | 488 | { |
8b2eb664 CH |
489 | size_t size = _IOC_SIZE(cmd); |
490 | struct cmbdata data; | |
491 | int ret; | |
492 | ||
8e09f215 | 493 | ret = cmf_readall(block->base->cdev, &data); |
8b2eb664 CH |
494 | if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) |
495 | return -EFAULT; | |
496 | return ret; | |
497 | } | |
498 | ||
cfdb00a7 AB |
499 | int dasd_ioctl(struct block_device *bdev, fmode_t mode, |
500 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 501 | { |
65f8da47 SW |
502 | struct dasd_block *block; |
503 | struct dasd_device *base; | |
88034865 | 504 | void __user *argp; |
65f8da47 | 505 | int rc; |
88034865 HC |
506 | |
507 | if (is_compat_task()) | |
508 | argp = compat_ptr(arg); | |
509 | else | |
510 | argp = (void __user *)arg; | |
1da177e4 | 511 | |
13c6204f CH |
512 | if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { |
513 | PRINT_DEBUG("empty data ptr"); | |
514 | return -EINVAL; | |
515 | } | |
1da177e4 | 516 | |
65f8da47 SW |
517 | base = dasd_device_from_gendisk(bdev->bd_disk); |
518 | if (!base) | |
519 | return -ENODEV; | |
520 | block = base->block; | |
521 | rc = 0; | |
13c6204f CH |
522 | switch (cmd) { |
523 | case BIODASDDISABLE: | |
65f8da47 SW |
524 | rc = dasd_ioctl_disable(bdev); |
525 | break; | |
13c6204f | 526 | case BIODASDENABLE: |
65f8da47 SW |
527 | rc = dasd_ioctl_enable(bdev); |
528 | break; | |
13c6204f | 529 | case BIODASDQUIESCE: |
65f8da47 SW |
530 | rc = dasd_ioctl_quiesce(block); |
531 | break; | |
13c6204f | 532 | case BIODASDRESUME: |
65f8da47 SW |
533 | rc = dasd_ioctl_resume(block); |
534 | break; | |
5ea34a01 HR |
535 | case BIODASDABORTIO: |
536 | rc = dasd_ioctl_abortio(block); | |
537 | break; | |
538 | case BIODASDALLOWIO: | |
539 | rc = dasd_ioctl_allowio(block); | |
540 | break; | |
13c6204f | 541 | case BIODASDFMT: |
65f8da47 SW |
542 | rc = dasd_ioctl_format(bdev, argp); |
543 | break; | |
13c6204f | 544 | case BIODASDINFO: |
65f8da47 SW |
545 | rc = dasd_ioctl_information(block, cmd, argp); |
546 | break; | |
13c6204f | 547 | case BIODASDINFO2: |
65f8da47 SW |
548 | rc = dasd_ioctl_information(block, cmd, argp); |
549 | break; | |
13c6204f | 550 | case BIODASDPRRD: |
65f8da47 SW |
551 | rc = dasd_ioctl_read_profile(block, argp); |
552 | break; | |
13c6204f | 553 | case BIODASDPRRST: |
65f8da47 SW |
554 | rc = dasd_ioctl_reset_profile(block); |
555 | break; | |
13c6204f | 556 | case BLKROSET: |
65f8da47 SW |
557 | rc = dasd_ioctl_set_ro(bdev, argp); |
558 | break; | |
13c6204f | 559 | case DASDAPIVER: |
65f8da47 SW |
560 | rc = dasd_ioctl_api_version(argp); |
561 | break; | |
8b2eb664 | 562 | case BIODASDCMFENABLE: |
65f8da47 SW |
563 | rc = enable_cmf(base->cdev); |
564 | break; | |
8b2eb664 | 565 | case BIODASDCMFDISABLE: |
65f8da47 SW |
566 | rc = disable_cmf(base->cdev); |
567 | break; | |
8b2eb664 | 568 | case BIODASDREADALLCMB: |
65f8da47 SW |
569 | rc = dasd_ioctl_readall_cmb(block, cmd, argp); |
570 | break; | |
13c6204f | 571 | default: |
1107ccfb | 572 | /* if the discipline has an ioctl method try it. */ |
6b79d14e HC |
573 | rc = -ENOTTY; |
574 | if (base->discipline->ioctl) | |
65f8da47 | 575 | rc = base->discipline->ioctl(block, cmd, argp); |
13c6204f | 576 | } |
65f8da47 SW |
577 | dasd_put_device(base); |
578 | return rc; | |
1da177e4 | 579 | } |