Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/partitions/check.c | |
3 | * | |
4 | * Code extracted from drivers/block/genhd.c | |
5 | * Copyright (C) 1991-1998 Linus Torvalds | |
6 | * Re-organised Feb 1998 Russell King | |
7 | * | |
8 | * We now have independent partition support from the | |
9 | * block drivers, which allows all the partition code to | |
10 | * be grouped in one location, and it to be mostly self | |
11 | * contained. | |
12 | * | |
13 | * Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl} | |
14 | */ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/kmod.h> | |
20 | #include <linux/ctype.h> | |
1da177e4 LT |
21 | |
22 | #include "check.h" | |
1da177e4 LT |
23 | |
24 | #include "acorn.h" | |
25 | #include "amiga.h" | |
26 | #include "atari.h" | |
27 | #include "ldm.h" | |
28 | #include "mac.h" | |
29 | #include "msdos.h" | |
30 | #include "osf.h" | |
31 | #include "sgi.h" | |
32 | #include "sun.h" | |
33 | #include "ibm.h" | |
34 | #include "ultrix.h" | |
35 | #include "efi.h" | |
0e6e1db4 | 36 | #include "karma.h" |
1da177e4 LT |
37 | |
38 | #ifdef CONFIG_BLK_DEV_MD | |
39 | extern void md_autodetect_dev(dev_t dev); | |
40 | #endif | |
41 | ||
42 | int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ | |
43 | ||
44 | static int (*check_part[])(struct parsed_partitions *, struct block_device *) = { | |
45 | /* | |
46 | * Probe partition formats with tables at disk address 0 | |
47 | * that also have an ADFS boot block at 0xdc0. | |
48 | */ | |
49 | #ifdef CONFIG_ACORN_PARTITION_ICS | |
50 | adfspart_check_ICS, | |
51 | #endif | |
52 | #ifdef CONFIG_ACORN_PARTITION_POWERTEC | |
53 | adfspart_check_POWERTEC, | |
54 | #endif | |
55 | #ifdef CONFIG_ACORN_PARTITION_EESOX | |
56 | adfspart_check_EESOX, | |
57 | #endif | |
58 | ||
59 | /* | |
60 | * Now move on to formats that only have partition info at | |
61 | * disk address 0xdc0. Since these may also have stale | |
62 | * PC/BIOS partition tables, they need to come before | |
63 | * the msdos entry. | |
64 | */ | |
65 | #ifdef CONFIG_ACORN_PARTITION_CUMANA | |
66 | adfspart_check_CUMANA, | |
67 | #endif | |
68 | #ifdef CONFIG_ACORN_PARTITION_ADFS | |
69 | adfspart_check_ADFS, | |
70 | #endif | |
71 | ||
72 | #ifdef CONFIG_EFI_PARTITION | |
73 | efi_partition, /* this must come before msdos */ | |
74 | #endif | |
75 | #ifdef CONFIG_SGI_PARTITION | |
76 | sgi_partition, | |
77 | #endif | |
78 | #ifdef CONFIG_LDM_PARTITION | |
79 | ldm_partition, /* this must come before msdos */ | |
80 | #endif | |
1da177e4 LT |
81 | #ifdef CONFIG_MSDOS_PARTITION |
82 | msdos_partition, | |
83 | #endif | |
84 | #ifdef CONFIG_OSF_PARTITION | |
85 | osf_partition, | |
86 | #endif | |
87 | #ifdef CONFIG_SUN_PARTITION | |
88 | sun_partition, | |
89 | #endif | |
90 | #ifdef CONFIG_AMIGA_PARTITION | |
91 | amiga_partition, | |
92 | #endif | |
93 | #ifdef CONFIG_ATARI_PARTITION | |
94 | atari_partition, | |
95 | #endif | |
96 | #ifdef CONFIG_MAC_PARTITION | |
97 | mac_partition, | |
98 | #endif | |
99 | #ifdef CONFIG_ULTRIX_PARTITION | |
100 | ultrix_partition, | |
101 | #endif | |
102 | #ifdef CONFIG_IBM_PARTITION | |
103 | ibm_partition, | |
0e6e1db4 BC |
104 | #endif |
105 | #ifdef CONFIG_KARMA_PARTITION | |
106 | karma_partition, | |
1da177e4 LT |
107 | #endif |
108 | NULL | |
109 | }; | |
110 | ||
111 | /* | |
112 | * disk_name() is used by partition check code and the genhd driver. | |
113 | * It formats the devicename of the indicated disk into | |
114 | * the supplied buffer (of size at least 32), and returns | |
115 | * a pointer to that same buffer (for convenience). | |
116 | */ | |
117 | ||
118 | char *disk_name(struct gendisk *hd, int part, char *buf) | |
119 | { | |
120 | if (!part) | |
121 | snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); | |
122 | else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) | |
123 | snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part); | |
124 | else | |
125 | snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part); | |
126 | ||
127 | return buf; | |
128 | } | |
129 | ||
130 | const char *bdevname(struct block_device *bdev, char *buf) | |
131 | { | |
132 | int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; | |
133 | return disk_name(bdev->bd_disk, part, buf); | |
134 | } | |
135 | ||
136 | EXPORT_SYMBOL(bdevname); | |
137 | ||
138 | /* | |
139 | * There's very little reason to use this, you should really | |
140 | * have a struct block_device just about everywhere and use | |
141 | * bdevname() instead. | |
142 | */ | |
143 | const char *__bdevname(dev_t dev, char *buffer) | |
144 | { | |
145 | scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", | |
146 | MAJOR(dev), MINOR(dev)); | |
147 | return buffer; | |
148 | } | |
149 | ||
150 | EXPORT_SYMBOL(__bdevname); | |
151 | ||
152 | static struct parsed_partitions * | |
153 | check_partition(struct gendisk *hd, struct block_device *bdev) | |
154 | { | |
155 | struct parsed_partitions *state; | |
57881dd9 | 156 | int i, res, err; |
1da177e4 LT |
157 | |
158 | state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL); | |
159 | if (!state) | |
160 | return NULL; | |
161 | ||
a2964188 GKH |
162 | disk_name(hd, 0, state->name); |
163 | printk(KERN_INFO " %s:", state->name); | |
164 | if (isdigit(state->name[strlen(state->name)-1])) | |
1da177e4 | 165 | sprintf(state->name, "p"); |
a2964188 | 166 | |
1da177e4 | 167 | state->limit = hd->minors; |
57881dd9 | 168 | i = res = err = 0; |
1da177e4 LT |
169 | while (!res && check_part[i]) { |
170 | memset(&state->parts, 0, sizeof(state->parts)); | |
171 | res = check_part[i++](state, bdev); | |
57881dd9 S |
172 | if (res < 0) { |
173 | /* We have hit an I/O error which we don't report now. | |
174 | * But record it, and let the others do their job. | |
175 | */ | |
176 | err = res; | |
177 | res = 0; | |
178 | } | |
179 | ||
1da177e4 LT |
180 | } |
181 | if (res > 0) | |
182 | return state; | |
9bebff6c | 183 | if (err) |
57881dd9 S |
184 | /* The partition is unrecognized. So report I/O errors if there were any */ |
185 | res = err; | |
1da177e4 LT |
186 | if (!res) |
187 | printk(" unknown partition table\n"); | |
188 | else if (warn_no_part) | |
189 | printk(" unable to read partition table\n"); | |
190 | kfree(state); | |
5127d002 | 191 | return ERR_PTR(res); |
1da177e4 LT |
192 | } |
193 | ||
194 | /* | |
195 | * sysfs bindings for partitions | |
196 | */ | |
197 | ||
198 | struct part_attribute { | |
199 | struct attribute attr; | |
200 | ssize_t (*show)(struct hd_struct *,char *); | |
a7fd6706 | 201 | ssize_t (*store)(struct hd_struct *,const char *, size_t); |
1da177e4 LT |
202 | }; |
203 | ||
204 | static ssize_t | |
205 | part_attr_show(struct kobject * kobj, struct attribute * attr, char * page) | |
206 | { | |
207 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
208 | struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); | |
209 | ssize_t ret = 0; | |
210 | if (part_attr->show) | |
a7fd6706 KS |
211 | ret = part_attr->show(p, page); |
212 | return ret; | |
213 | } | |
214 | static ssize_t | |
215 | part_attr_store(struct kobject * kobj, struct attribute * attr, | |
216 | const char *page, size_t count) | |
217 | { | |
218 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
219 | struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); | |
220 | ssize_t ret = 0; | |
221 | ||
222 | if (part_attr->store) | |
223 | ret = part_attr->store(p, page, count); | |
1da177e4 LT |
224 | return ret; |
225 | } | |
226 | ||
227 | static struct sysfs_ops part_sysfs_ops = { | |
228 | .show = part_attr_show, | |
a7fd6706 | 229 | .store = part_attr_store, |
1da177e4 LT |
230 | }; |
231 | ||
a7fd6706 KS |
232 | static ssize_t part_uevent_store(struct hd_struct * p, |
233 | const char *page, size_t count) | |
234 | { | |
312c004d | 235 | kobject_uevent(&p->kobj, KOBJ_ADD); |
a7fd6706 KS |
236 | return count; |
237 | } | |
1da177e4 LT |
238 | static ssize_t part_dev_read(struct hd_struct * p, char *page) |
239 | { | |
240 | struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj); | |
241 | dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno); | |
242 | return print_dev_t(page, dev); | |
243 | } | |
244 | static ssize_t part_start_read(struct hd_struct * p, char *page) | |
245 | { | |
246 | return sprintf(page, "%llu\n",(unsigned long long)p->start_sect); | |
247 | } | |
248 | static ssize_t part_size_read(struct hd_struct * p, char *page) | |
249 | { | |
250 | return sprintf(page, "%llu\n",(unsigned long long)p->nr_sects); | |
251 | } | |
252 | static ssize_t part_stat_read(struct hd_struct * p, char *page) | |
253 | { | |
254 | return sprintf(page, "%8u %8llu %8u %8llu\n", | |
a362357b JA |
255 | p->ios[0], (unsigned long long)p->sectors[0], |
256 | p->ios[1], (unsigned long long)p->sectors[1]); | |
1da177e4 | 257 | } |
a7fd6706 KS |
258 | static struct part_attribute part_attr_uevent = { |
259 | .attr = {.name = "uevent", .mode = S_IWUSR }, | |
260 | .store = part_uevent_store | |
261 | }; | |
1da177e4 LT |
262 | static struct part_attribute part_attr_dev = { |
263 | .attr = {.name = "dev", .mode = S_IRUGO }, | |
264 | .show = part_dev_read | |
265 | }; | |
266 | static struct part_attribute part_attr_start = { | |
267 | .attr = {.name = "start", .mode = S_IRUGO }, | |
268 | .show = part_start_read | |
269 | }; | |
270 | static struct part_attribute part_attr_size = { | |
271 | .attr = {.name = "size", .mode = S_IRUGO }, | |
272 | .show = part_size_read | |
273 | }; | |
274 | static struct part_attribute part_attr_stat = { | |
275 | .attr = {.name = "stat", .mode = S_IRUGO }, | |
276 | .show = part_stat_read | |
277 | }; | |
278 | ||
c17bb495 AM |
279 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
280 | ||
281 | static ssize_t part_fail_store(struct hd_struct * p, | |
282 | const char *buf, size_t count) | |
283 | { | |
284 | int i; | |
285 | ||
286 | if (count > 0 && sscanf(buf, "%d", &i) > 0) | |
287 | p->make_it_fail = (i == 0) ? 0 : 1; | |
288 | ||
289 | return count; | |
290 | } | |
291 | static ssize_t part_fail_read(struct hd_struct * p, char *page) | |
292 | { | |
293 | return sprintf(page, "%d\n", p->make_it_fail); | |
294 | } | |
295 | static struct part_attribute part_attr_fail = { | |
296 | .attr = {.name = "make-it-fail", .mode = S_IRUGO | S_IWUSR }, | |
297 | .store = part_fail_store, | |
298 | .show = part_fail_read | |
299 | }; | |
300 | ||
301 | #endif | |
302 | ||
1da177e4 | 303 | static struct attribute * default_attrs[] = { |
a7fd6706 | 304 | &part_attr_uevent.attr, |
1da177e4 LT |
305 | &part_attr_dev.attr, |
306 | &part_attr_start.attr, | |
307 | &part_attr_size.attr, | |
308 | &part_attr_stat.attr, | |
c17bb495 AM |
309 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
310 | &part_attr_fail.attr, | |
311 | #endif | |
1da177e4 LT |
312 | NULL, |
313 | }; | |
314 | ||
315 | extern struct subsystem block_subsys; | |
316 | ||
317 | static void part_release(struct kobject *kobj) | |
318 | { | |
319 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
320 | kfree(p); | |
321 | } | |
322 | ||
323 | struct kobj_type ktype_part = { | |
324 | .release = part_release, | |
325 | .default_attrs = default_attrs, | |
326 | .sysfs_ops = &part_sysfs_ops, | |
327 | }; | |
328 | ||
6a4d44c1 JN |
329 | static inline void partition_sysfs_add_subdir(struct hd_struct *p) |
330 | { | |
331 | struct kobject *k; | |
332 | ||
333 | k = kobject_get(&p->kobj); | |
334 | p->holder_dir = kobject_add_dir(k, "holders"); | |
335 | kobject_put(k); | |
336 | } | |
337 | ||
338 | static inline void disk_sysfs_add_subdirs(struct gendisk *disk) | |
339 | { | |
340 | struct kobject *k; | |
341 | ||
342 | k = kobject_get(&disk->kobj); | |
343 | disk->holder_dir = kobject_add_dir(k, "holders"); | |
344 | disk->slave_dir = kobject_add_dir(k, "slaves"); | |
345 | kobject_put(k); | |
346 | } | |
6a4d44c1 | 347 | |
1da177e4 LT |
348 | void delete_partition(struct gendisk *disk, int part) |
349 | { | |
350 | struct hd_struct *p = disk->part[part-1]; | |
351 | if (!p) | |
352 | return; | |
353 | if (!p->nr_sects) | |
354 | return; | |
355 | disk->part[part-1] = NULL; | |
356 | p->start_sect = 0; | |
357 | p->nr_sects = 0; | |
a362357b JA |
358 | p->ios[0] = p->ios[1] = 0; |
359 | p->sectors[0] = p->sectors[1] = 0; | |
b9d9c82b | 360 | sysfs_remove_link(&p->kobj, "subsystem"); |
b92be9f1 | 361 | kobject_unregister(p->holder_dir); |
d4d7e5df KS |
362 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
363 | kobject_del(&p->kobj); | |
364 | kobject_put(&p->kobj); | |
1da177e4 LT |
365 | } |
366 | ||
d18d7682 | 367 | void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags) |
1da177e4 LT |
368 | { |
369 | struct hd_struct *p; | |
370 | ||
371 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
372 | if (!p) | |
373 | return; | |
374 | ||
375 | memset(p, 0, sizeof(*p)); | |
376 | p->start_sect = start; | |
377 | p->nr_sects = len; | |
378 | p->partno = part; | |
25e206b5 | 379 | p->policy = disk->policy; |
1da177e4 | 380 | |
1da177e4 LT |
381 | if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1])) |
382 | snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part); | |
383 | else | |
384 | snprintf(p->kobj.name,KOBJ_NAME_LEN,"%s%d",disk->kobj.name,part); | |
385 | p->kobj.parent = &disk->kobj; | |
386 | p->kobj.ktype = &ktype_part; | |
d4d7e5df KS |
387 | kobject_init(&p->kobj); |
388 | kobject_add(&p->kobj); | |
389 | if (!disk->part_uevent_suppress) | |
390 | kobject_uevent(&p->kobj, KOBJ_ADD); | |
b9d9c82b | 391 | sysfs_create_link(&p->kobj, &block_subsys.kset.kobj, "subsystem"); |
d18d7682 FMDN |
392 | if (flags & ADDPART_FLAG_WHOLEDISK) { |
393 | static struct attribute addpartattr = { | |
394 | .name = "whole_disk", | |
395 | .mode = S_IRUSR | S_IRGRP | S_IROTH, | |
396 | .owner = THIS_MODULE, | |
397 | }; | |
398 | ||
399 | sysfs_create_file(&p->kobj, &addpartattr); | |
400 | } | |
6a4d44c1 | 401 | partition_sysfs_add_subdir(p); |
1da177e4 LT |
402 | disk->part[part-1] = p; |
403 | } | |
404 | ||
8218ef80 GKH |
405 | static char *make_block_name(struct gendisk *disk) |
406 | { | |
407 | char *name; | |
408 | static char *block_str = "block:"; | |
409 | int size; | |
2436f039 | 410 | char *s; |
8218ef80 GKH |
411 | |
412 | size = strlen(block_str) + strlen(disk->disk_name) + 1; | |
413 | name = kmalloc(size, GFP_KERNEL); | |
414 | if (!name) | |
415 | return NULL; | |
416 | strcpy(name, block_str); | |
417 | strcat(name, disk->disk_name); | |
2436f039 SR |
418 | /* ewww... some of these buggers have / in name... */ |
419 | s = strchr(name, '/'); | |
420 | if (s) | |
421 | *s = '!'; | |
8218ef80 GKH |
422 | return name; |
423 | } | |
424 | ||
eee44cca | 425 | static int disk_sysfs_symlinks(struct gendisk *disk) |
1da177e4 LT |
426 | { |
427 | struct device *target = get_device(disk->driverfs_dev); | |
eee44cca JG |
428 | int err; |
429 | char *disk_name = NULL; | |
430 | ||
1da177e4 | 431 | if (target) { |
eee44cca JG |
432 | disk_name = make_block_name(disk); |
433 | if (!disk_name) { | |
434 | err = -ENOMEM; | |
435 | goto err_out; | |
8218ef80 | 436 | } |
eee44cca JG |
437 | |
438 | err = sysfs_create_link(&disk->kobj, &target->kobj, "device"); | |
439 | if (err) | |
440 | goto err_out_disk_name; | |
441 | ||
442 | err = sysfs_create_link(&target->kobj, &disk->kobj, disk_name); | |
443 | if (err) | |
444 | goto err_out_dev_link; | |
445 | } | |
446 | ||
447 | err = sysfs_create_link(&disk->kobj, &block_subsys.kset.kobj, | |
448 | "subsystem"); | |
449 | if (err) | |
450 | goto err_out_disk_name_lnk; | |
451 | ||
452 | kfree(disk_name); | |
453 | ||
454 | return 0; | |
455 | ||
456 | err_out_disk_name_lnk: | |
457 | if (target) { | |
458 | sysfs_remove_link(&target->kobj, disk_name); | |
459 | err_out_dev_link: | |
460 | sysfs_remove_link(&disk->kobj, "device"); | |
461 | err_out_disk_name: | |
462 | kfree(disk_name); | |
463 | err_out: | |
464 | put_device(target); | |
1da177e4 | 465 | } |
eee44cca | 466 | return err; |
1da177e4 LT |
467 | } |
468 | ||
469 | /* Not exported, helper to add_disk(). */ | |
470 | void register_disk(struct gendisk *disk) | |
471 | { | |
472 | struct block_device *bdev; | |
473 | char *s; | |
d4d7e5df KS |
474 | int i; |
475 | struct hd_struct *p; | |
1da177e4 LT |
476 | int err; |
477 | ||
478 | strlcpy(disk->kobj.name,disk->disk_name,KOBJ_NAME_LEN); | |
479 | /* ewww... some of these buggers have / in name... */ | |
480 | s = strchr(disk->kobj.name, '/'); | |
481 | if (s) | |
482 | *s = '!'; | |
483 | if ((err = kobject_add(&disk->kobj))) | |
484 | return; | |
eee44cca JG |
485 | err = disk_sysfs_symlinks(disk); |
486 | if (err) { | |
487 | kobject_del(&disk->kobj); | |
488 | return; | |
489 | } | |
6a4d44c1 | 490 | disk_sysfs_add_subdirs(disk); |
1da177e4 LT |
491 | |
492 | /* No minors to use for partitions */ | |
a2964188 | 493 | if (disk->minors == 1) |
d4d7e5df | 494 | goto exit; |
1da177e4 LT |
495 | |
496 | /* No such device (e.g., media were just removed) */ | |
497 | if (!get_capacity(disk)) | |
d4d7e5df | 498 | goto exit; |
1da177e4 LT |
499 | |
500 | bdev = bdget_disk(disk, 0); | |
501 | if (!bdev) | |
d4d7e5df | 502 | goto exit; |
1da177e4 | 503 | |
d4d7e5df | 504 | /* scan partition table, but suppress uevents */ |
1da177e4 | 505 | bdev->bd_invalidated = 1; |
d4d7e5df KS |
506 | disk->part_uevent_suppress = 1; |
507 | err = blkdev_get(bdev, FMODE_READ, 0); | |
508 | disk->part_uevent_suppress = 0; | |
509 | if (err < 0) | |
510 | goto exit; | |
1da177e4 | 511 | blkdev_put(bdev); |
d4d7e5df KS |
512 | |
513 | exit: | |
514 | /* announce disk after possible partitions are already created */ | |
515 | kobject_uevent(&disk->kobj, KOBJ_ADD); | |
516 | ||
517 | /* announce possible partitions */ | |
518 | for (i = 1; i < disk->minors; i++) { | |
519 | p = disk->part[i-1]; | |
520 | if (!p || !p->nr_sects) | |
521 | continue; | |
522 | kobject_uevent(&p->kobj, KOBJ_ADD); | |
523 | } | |
1da177e4 LT |
524 | } |
525 | ||
526 | int rescan_partitions(struct gendisk *disk, struct block_device *bdev) | |
527 | { | |
528 | struct parsed_partitions *state; | |
529 | int p, res; | |
530 | ||
531 | if (bdev->bd_part_count) | |
532 | return -EBUSY; | |
533 | res = invalidate_partition(disk, 0); | |
534 | if (res) | |
535 | return res; | |
536 | bdev->bd_invalidated = 0; | |
537 | for (p = 1; p < disk->minors; p++) | |
538 | delete_partition(disk, p); | |
539 | if (disk->fops->revalidate_disk) | |
540 | disk->fops->revalidate_disk(disk); | |
541 | if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) | |
542 | return 0; | |
5127d002 SK |
543 | if (IS_ERR(state)) /* I/O error reading the partition table */ |
544 | return PTR_ERR(state); | |
1da177e4 LT |
545 | for (p = 1; p < state->limit; p++) { |
546 | sector_t size = state->parts[p].size; | |
547 | sector_t from = state->parts[p].from; | |
548 | if (!size) | |
549 | continue; | |
98bd34ea MM |
550 | if (from + size > get_capacity(disk)) { |
551 | printk(" %s: p%d exceeds device capacity\n", | |
552 | disk->disk_name, p); | |
553 | } | |
d18d7682 | 554 | add_partition(disk, p, from, size, state->parts[p].flags); |
1da177e4 | 555 | #ifdef CONFIG_BLK_DEV_MD |
d18d7682 | 556 | if (state->parts[p].flags & ADDPART_FLAG_RAID) |
1da177e4 LT |
557 | md_autodetect_dev(bdev->bd_dev+p); |
558 | #endif | |
559 | } | |
560 | kfree(state); | |
561 | return 0; | |
562 | } | |
563 | ||
564 | unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) | |
565 | { | |
566 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
567 | struct page *page; | |
568 | ||
090d2b18 PE |
569 | page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), |
570 | NULL); | |
1da177e4 LT |
571 | if (!IS_ERR(page)) { |
572 | wait_on_page_locked(page); | |
573 | if (!PageUptodate(page)) | |
574 | goto fail; | |
575 | if (PageError(page)) | |
576 | goto fail; | |
577 | p->v = page; | |
578 | return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); | |
579 | fail: | |
580 | page_cache_release(page); | |
581 | } | |
582 | p->v = NULL; | |
583 | return NULL; | |
584 | } | |
585 | ||
586 | EXPORT_SYMBOL(read_dev_sector); | |
587 | ||
588 | void del_gendisk(struct gendisk *disk) | |
589 | { | |
590 | int p; | |
591 | ||
592 | /* invalidate stuff */ | |
593 | for (p = disk->minors - 1; p > 0; p--) { | |
594 | invalidate_partition(disk, p); | |
595 | delete_partition(disk, p); | |
596 | } | |
597 | invalidate_partition(disk, 0); | |
598 | disk->capacity = 0; | |
599 | disk->flags &= ~GENHD_FL_UP; | |
600 | unlink_gendisk(disk); | |
601 | disk_stat_set_all(disk, 0); | |
20e5c81f | 602 | disk->stamp = 0; |
1da177e4 | 603 | |
032ebf26 | 604 | kobject_uevent(&disk->kobj, KOBJ_REMOVE); |
b92be9f1 MK |
605 | kobject_unregister(disk->holder_dir); |
606 | kobject_unregister(disk->slave_dir); | |
1da177e4 | 607 | if (disk->driverfs_dev) { |
8218ef80 | 608 | char *disk_name = make_block_name(disk); |
1da177e4 | 609 | sysfs_remove_link(&disk->kobj, "device"); |
8218ef80 GKH |
610 | if (disk_name) { |
611 | sysfs_remove_link(&disk->driverfs_dev->kobj, disk_name); | |
612 | kfree(disk_name); | |
613 | } | |
1da177e4 | 614 | put_device(disk->driverfs_dev); |
032ebf26 | 615 | disk->driverfs_dev = NULL; |
1da177e4 | 616 | } |
b9d9c82b | 617 | sysfs_remove_link(&disk->kobj, "subsystem"); |
1da177e4 LT |
618 | kobject_del(&disk->kobj); |
619 | } |