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Commit | Line | Data |
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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" |
19d0e8ce | 37 | #include "sysv68.h" |
1da177e4 LT |
38 | |
39 | #ifdef CONFIG_BLK_DEV_MD | |
40 | extern void md_autodetect_dev(dev_t dev); | |
41 | #endif | |
42 | ||
43 | int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ | |
44 | ||
45 | static int (*check_part[])(struct parsed_partitions *, struct block_device *) = { | |
46 | /* | |
47 | * Probe partition formats with tables at disk address 0 | |
48 | * that also have an ADFS boot block at 0xdc0. | |
49 | */ | |
50 | #ifdef CONFIG_ACORN_PARTITION_ICS | |
51 | adfspart_check_ICS, | |
52 | #endif | |
53 | #ifdef CONFIG_ACORN_PARTITION_POWERTEC | |
54 | adfspart_check_POWERTEC, | |
55 | #endif | |
56 | #ifdef CONFIG_ACORN_PARTITION_EESOX | |
57 | adfspart_check_EESOX, | |
58 | #endif | |
59 | ||
60 | /* | |
61 | * Now move on to formats that only have partition info at | |
62 | * disk address 0xdc0. Since these may also have stale | |
63 | * PC/BIOS partition tables, they need to come before | |
64 | * the msdos entry. | |
65 | */ | |
66 | #ifdef CONFIG_ACORN_PARTITION_CUMANA | |
67 | adfspart_check_CUMANA, | |
68 | #endif | |
69 | #ifdef CONFIG_ACORN_PARTITION_ADFS | |
70 | adfspart_check_ADFS, | |
71 | #endif | |
72 | ||
73 | #ifdef CONFIG_EFI_PARTITION | |
74 | efi_partition, /* this must come before msdos */ | |
75 | #endif | |
76 | #ifdef CONFIG_SGI_PARTITION | |
77 | sgi_partition, | |
78 | #endif | |
79 | #ifdef CONFIG_LDM_PARTITION | |
80 | ldm_partition, /* this must come before msdos */ | |
81 | #endif | |
1da177e4 LT |
82 | #ifdef CONFIG_MSDOS_PARTITION |
83 | msdos_partition, | |
84 | #endif | |
85 | #ifdef CONFIG_OSF_PARTITION | |
86 | osf_partition, | |
87 | #endif | |
88 | #ifdef CONFIG_SUN_PARTITION | |
89 | sun_partition, | |
90 | #endif | |
91 | #ifdef CONFIG_AMIGA_PARTITION | |
92 | amiga_partition, | |
93 | #endif | |
94 | #ifdef CONFIG_ATARI_PARTITION | |
95 | atari_partition, | |
96 | #endif | |
97 | #ifdef CONFIG_MAC_PARTITION | |
98 | mac_partition, | |
99 | #endif | |
100 | #ifdef CONFIG_ULTRIX_PARTITION | |
101 | ultrix_partition, | |
102 | #endif | |
103 | #ifdef CONFIG_IBM_PARTITION | |
104 | ibm_partition, | |
0e6e1db4 BC |
105 | #endif |
106 | #ifdef CONFIG_KARMA_PARTITION | |
107 | karma_partition, | |
19d0e8ce PDM |
108 | #endif |
109 | #ifdef CONFIG_SYSV68_PARTITION | |
110 | sysv68_partition, | |
1da177e4 LT |
111 | #endif |
112 | NULL | |
113 | }; | |
114 | ||
115 | /* | |
116 | * disk_name() is used by partition check code and the genhd driver. | |
117 | * It formats the devicename of the indicated disk into | |
118 | * the supplied buffer (of size at least 32), and returns | |
119 | * a pointer to that same buffer (for convenience). | |
120 | */ | |
121 | ||
122 | char *disk_name(struct gendisk *hd, int part, char *buf) | |
123 | { | |
124 | if (!part) | |
125 | snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); | |
126 | else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) | |
127 | snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part); | |
128 | else | |
129 | snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part); | |
130 | ||
131 | return buf; | |
132 | } | |
133 | ||
134 | const char *bdevname(struct block_device *bdev, char *buf) | |
135 | { | |
136 | int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; | |
137 | return disk_name(bdev->bd_disk, part, buf); | |
138 | } | |
139 | ||
140 | EXPORT_SYMBOL(bdevname); | |
141 | ||
142 | /* | |
143 | * There's very little reason to use this, you should really | |
144 | * have a struct block_device just about everywhere and use | |
145 | * bdevname() instead. | |
146 | */ | |
147 | const char *__bdevname(dev_t dev, char *buffer) | |
148 | { | |
149 | scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", | |
150 | MAJOR(dev), MINOR(dev)); | |
151 | return buffer; | |
152 | } | |
153 | ||
154 | EXPORT_SYMBOL(__bdevname); | |
155 | ||
156 | static struct parsed_partitions * | |
157 | check_partition(struct gendisk *hd, struct block_device *bdev) | |
158 | { | |
159 | struct parsed_partitions *state; | |
57881dd9 | 160 | int i, res, err; |
1da177e4 LT |
161 | |
162 | state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL); | |
163 | if (!state) | |
164 | return NULL; | |
165 | ||
a2964188 GKH |
166 | disk_name(hd, 0, state->name); |
167 | printk(KERN_INFO " %s:", state->name); | |
168 | if (isdigit(state->name[strlen(state->name)-1])) | |
1da177e4 | 169 | sprintf(state->name, "p"); |
a2964188 | 170 | |
1da177e4 | 171 | state->limit = hd->minors; |
57881dd9 | 172 | i = res = err = 0; |
1da177e4 LT |
173 | while (!res && check_part[i]) { |
174 | memset(&state->parts, 0, sizeof(state->parts)); | |
175 | res = check_part[i++](state, bdev); | |
57881dd9 S |
176 | if (res < 0) { |
177 | /* We have hit an I/O error which we don't report now. | |
178 | * But record it, and let the others do their job. | |
179 | */ | |
180 | err = res; | |
181 | res = 0; | |
182 | } | |
183 | ||
1da177e4 LT |
184 | } |
185 | if (res > 0) | |
186 | return state; | |
9bebff6c | 187 | if (err) |
57881dd9 S |
188 | /* The partition is unrecognized. So report I/O errors if there were any */ |
189 | res = err; | |
1da177e4 LT |
190 | if (!res) |
191 | printk(" unknown partition table\n"); | |
192 | else if (warn_no_part) | |
193 | printk(" unable to read partition table\n"); | |
194 | kfree(state); | |
5127d002 | 195 | return ERR_PTR(res); |
1da177e4 LT |
196 | } |
197 | ||
198 | /* | |
199 | * sysfs bindings for partitions | |
200 | */ | |
201 | ||
202 | struct part_attribute { | |
203 | struct attribute attr; | |
204 | ssize_t (*show)(struct hd_struct *,char *); | |
a7fd6706 | 205 | ssize_t (*store)(struct hd_struct *,const char *, size_t); |
1da177e4 LT |
206 | }; |
207 | ||
208 | static ssize_t | |
209 | part_attr_show(struct kobject * kobj, struct attribute * attr, char * page) | |
210 | { | |
211 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
212 | struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); | |
213 | ssize_t ret = 0; | |
214 | if (part_attr->show) | |
a7fd6706 KS |
215 | ret = part_attr->show(p, page); |
216 | return ret; | |
217 | } | |
218 | static ssize_t | |
219 | part_attr_store(struct kobject * kobj, struct attribute * attr, | |
220 | const char *page, size_t count) | |
221 | { | |
222 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
223 | struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); | |
224 | ssize_t ret = 0; | |
225 | ||
226 | if (part_attr->store) | |
227 | ret = part_attr->store(p, page, count); | |
1da177e4 LT |
228 | return ret; |
229 | } | |
230 | ||
231 | static struct sysfs_ops part_sysfs_ops = { | |
232 | .show = part_attr_show, | |
a7fd6706 | 233 | .store = part_attr_store, |
1da177e4 LT |
234 | }; |
235 | ||
a7fd6706 KS |
236 | static ssize_t part_uevent_store(struct hd_struct * p, |
237 | const char *page, size_t count) | |
238 | { | |
312c004d | 239 | kobject_uevent(&p->kobj, KOBJ_ADD); |
a7fd6706 KS |
240 | return count; |
241 | } | |
1da177e4 LT |
242 | static ssize_t part_dev_read(struct hd_struct * p, char *page) |
243 | { | |
244 | struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj); | |
245 | dev_t dev = MKDEV(disk->major, disk->first_minor + p->partno); | |
246 | return print_dev_t(page, dev); | |
247 | } | |
248 | static ssize_t part_start_read(struct hd_struct * p, char *page) | |
249 | { | |
250 | return sprintf(page, "%llu\n",(unsigned long long)p->start_sect); | |
251 | } | |
252 | static ssize_t part_size_read(struct hd_struct * p, char *page) | |
253 | { | |
254 | return sprintf(page, "%llu\n",(unsigned long long)p->nr_sects); | |
255 | } | |
256 | static ssize_t part_stat_read(struct hd_struct * p, char *page) | |
257 | { | |
258 | return sprintf(page, "%8u %8llu %8u %8llu\n", | |
a362357b JA |
259 | p->ios[0], (unsigned long long)p->sectors[0], |
260 | p->ios[1], (unsigned long long)p->sectors[1]); | |
1da177e4 | 261 | } |
a7fd6706 KS |
262 | static struct part_attribute part_attr_uevent = { |
263 | .attr = {.name = "uevent", .mode = S_IWUSR }, | |
264 | .store = part_uevent_store | |
265 | }; | |
1da177e4 LT |
266 | static struct part_attribute part_attr_dev = { |
267 | .attr = {.name = "dev", .mode = S_IRUGO }, | |
268 | .show = part_dev_read | |
269 | }; | |
270 | static struct part_attribute part_attr_start = { | |
271 | .attr = {.name = "start", .mode = S_IRUGO }, | |
272 | .show = part_start_read | |
273 | }; | |
274 | static struct part_attribute part_attr_size = { | |
275 | .attr = {.name = "size", .mode = S_IRUGO }, | |
276 | .show = part_size_read | |
277 | }; | |
278 | static struct part_attribute part_attr_stat = { | |
279 | .attr = {.name = "stat", .mode = S_IRUGO }, | |
280 | .show = part_stat_read | |
281 | }; | |
282 | ||
c17bb495 AM |
283 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
284 | ||
285 | static ssize_t part_fail_store(struct hd_struct * p, | |
286 | const char *buf, size_t count) | |
287 | { | |
288 | int i; | |
289 | ||
290 | if (count > 0 && sscanf(buf, "%d", &i) > 0) | |
291 | p->make_it_fail = (i == 0) ? 0 : 1; | |
292 | ||
293 | return count; | |
294 | } | |
295 | static ssize_t part_fail_read(struct hd_struct * p, char *page) | |
296 | { | |
297 | return sprintf(page, "%d\n", p->make_it_fail); | |
298 | } | |
299 | static struct part_attribute part_attr_fail = { | |
300 | .attr = {.name = "make-it-fail", .mode = S_IRUGO | S_IWUSR }, | |
301 | .store = part_fail_store, | |
302 | .show = part_fail_read | |
303 | }; | |
304 | ||
305 | #endif | |
306 | ||
1da177e4 | 307 | static struct attribute * default_attrs[] = { |
a7fd6706 | 308 | &part_attr_uevent.attr, |
1da177e4 LT |
309 | &part_attr_dev.attr, |
310 | &part_attr_start.attr, | |
311 | &part_attr_size.attr, | |
312 | &part_attr_stat.attr, | |
c17bb495 AM |
313 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
314 | &part_attr_fail.attr, | |
315 | #endif | |
1da177e4 LT |
316 | NULL, |
317 | }; | |
318 | ||
823bccfc | 319 | extern struct kset block_subsys; |
1da177e4 LT |
320 | |
321 | static void part_release(struct kobject *kobj) | |
322 | { | |
323 | struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); | |
324 | kfree(p); | |
325 | } | |
326 | ||
327 | struct kobj_type ktype_part = { | |
328 | .release = part_release, | |
329 | .default_attrs = default_attrs, | |
330 | .sysfs_ops = &part_sysfs_ops, | |
331 | }; | |
332 | ||
6a4d44c1 JN |
333 | static inline void partition_sysfs_add_subdir(struct hd_struct *p) |
334 | { | |
335 | struct kobject *k; | |
336 | ||
337 | k = kobject_get(&p->kobj); | |
338 | p->holder_dir = kobject_add_dir(k, "holders"); | |
339 | kobject_put(k); | |
340 | } | |
341 | ||
342 | static inline void disk_sysfs_add_subdirs(struct gendisk *disk) | |
343 | { | |
344 | struct kobject *k; | |
345 | ||
346 | k = kobject_get(&disk->kobj); | |
347 | disk->holder_dir = kobject_add_dir(k, "holders"); | |
348 | disk->slave_dir = kobject_add_dir(k, "slaves"); | |
349 | kobject_put(k); | |
350 | } | |
6a4d44c1 | 351 | |
1da177e4 LT |
352 | void delete_partition(struct gendisk *disk, int part) |
353 | { | |
354 | struct hd_struct *p = disk->part[part-1]; | |
355 | if (!p) | |
356 | return; | |
357 | if (!p->nr_sects) | |
358 | return; | |
359 | disk->part[part-1] = NULL; | |
360 | p->start_sect = 0; | |
361 | p->nr_sects = 0; | |
a362357b JA |
362 | p->ios[0] = p->ios[1] = 0; |
363 | p->sectors[0] = p->sectors[1] = 0; | |
b9d9c82b | 364 | sysfs_remove_link(&p->kobj, "subsystem"); |
b92be9f1 | 365 | kobject_unregister(p->holder_dir); |
d4d7e5df KS |
366 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
367 | kobject_del(&p->kobj); | |
368 | kobject_put(&p->kobj); | |
1da177e4 LT |
369 | } |
370 | ||
d18d7682 | 371 | void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags) |
1da177e4 LT |
372 | { |
373 | struct hd_struct *p; | |
374 | ||
375 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
376 | if (!p) | |
377 | return; | |
378 | ||
379 | memset(p, 0, sizeof(*p)); | |
380 | p->start_sect = start; | |
381 | p->nr_sects = len; | |
382 | p->partno = part; | |
25e206b5 | 383 | p->policy = disk->policy; |
1da177e4 | 384 | |
1da177e4 LT |
385 | if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1])) |
386 | snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part); | |
387 | else | |
388 | snprintf(p->kobj.name,KOBJ_NAME_LEN,"%s%d",disk->kobj.name,part); | |
389 | p->kobj.parent = &disk->kobj; | |
390 | p->kobj.ktype = &ktype_part; | |
d4d7e5df KS |
391 | kobject_init(&p->kobj); |
392 | kobject_add(&p->kobj); | |
393 | if (!disk->part_uevent_suppress) | |
394 | kobject_uevent(&p->kobj, KOBJ_ADD); | |
823bccfc | 395 | sysfs_create_link(&p->kobj, &block_subsys.kobj, "subsystem"); |
d18d7682 FMDN |
396 | if (flags & ADDPART_FLAG_WHOLEDISK) { |
397 | static struct attribute addpartattr = { | |
398 | .name = "whole_disk", | |
399 | .mode = S_IRUSR | S_IRGRP | S_IROTH, | |
d18d7682 FMDN |
400 | }; |
401 | ||
402 | sysfs_create_file(&p->kobj, &addpartattr); | |
403 | } | |
6a4d44c1 | 404 | partition_sysfs_add_subdir(p); |
1da177e4 LT |
405 | disk->part[part-1] = p; |
406 | } | |
407 | ||
8218ef80 GKH |
408 | static char *make_block_name(struct gendisk *disk) |
409 | { | |
410 | char *name; | |
411 | static char *block_str = "block:"; | |
412 | int size; | |
2436f039 | 413 | char *s; |
8218ef80 GKH |
414 | |
415 | size = strlen(block_str) + strlen(disk->disk_name) + 1; | |
416 | name = kmalloc(size, GFP_KERNEL); | |
417 | if (!name) | |
418 | return NULL; | |
419 | strcpy(name, block_str); | |
420 | strcat(name, disk->disk_name); | |
2436f039 SR |
421 | /* ewww... some of these buggers have / in name... */ |
422 | s = strchr(name, '/'); | |
423 | if (s) | |
424 | *s = '!'; | |
8218ef80 GKH |
425 | return name; |
426 | } | |
427 | ||
eee44cca | 428 | static int disk_sysfs_symlinks(struct gendisk *disk) |
1da177e4 LT |
429 | { |
430 | struct device *target = get_device(disk->driverfs_dev); | |
eee44cca JG |
431 | int err; |
432 | char *disk_name = NULL; | |
433 | ||
1da177e4 | 434 | if (target) { |
eee44cca JG |
435 | disk_name = make_block_name(disk); |
436 | if (!disk_name) { | |
437 | err = -ENOMEM; | |
438 | goto err_out; | |
8218ef80 | 439 | } |
eee44cca JG |
440 | |
441 | err = sysfs_create_link(&disk->kobj, &target->kobj, "device"); | |
442 | if (err) | |
443 | goto err_out_disk_name; | |
444 | ||
445 | err = sysfs_create_link(&target->kobj, &disk->kobj, disk_name); | |
446 | if (err) | |
447 | goto err_out_dev_link; | |
448 | } | |
449 | ||
823bccfc | 450 | err = sysfs_create_link(&disk->kobj, &block_subsys.kobj, |
eee44cca JG |
451 | "subsystem"); |
452 | if (err) | |
453 | goto err_out_disk_name_lnk; | |
454 | ||
455 | kfree(disk_name); | |
456 | ||
457 | return 0; | |
458 | ||
459 | err_out_disk_name_lnk: | |
460 | if (target) { | |
461 | sysfs_remove_link(&target->kobj, disk_name); | |
462 | err_out_dev_link: | |
463 | sysfs_remove_link(&disk->kobj, "device"); | |
464 | err_out_disk_name: | |
465 | kfree(disk_name); | |
466 | err_out: | |
467 | put_device(target); | |
1da177e4 | 468 | } |
eee44cca | 469 | return err; |
1da177e4 LT |
470 | } |
471 | ||
472 | /* Not exported, helper to add_disk(). */ | |
473 | void register_disk(struct gendisk *disk) | |
474 | { | |
475 | struct block_device *bdev; | |
476 | char *s; | |
d4d7e5df KS |
477 | int i; |
478 | struct hd_struct *p; | |
1da177e4 LT |
479 | int err; |
480 | ||
481 | strlcpy(disk->kobj.name,disk->disk_name,KOBJ_NAME_LEN); | |
482 | /* ewww... some of these buggers have / in name... */ | |
483 | s = strchr(disk->kobj.name, '/'); | |
484 | if (s) | |
485 | *s = '!'; | |
486 | if ((err = kobject_add(&disk->kobj))) | |
487 | return; | |
eee44cca JG |
488 | err = disk_sysfs_symlinks(disk); |
489 | if (err) { | |
490 | kobject_del(&disk->kobj); | |
491 | return; | |
492 | } | |
6a4d44c1 | 493 | disk_sysfs_add_subdirs(disk); |
1da177e4 LT |
494 | |
495 | /* No minors to use for partitions */ | |
a2964188 | 496 | if (disk->minors == 1) |
d4d7e5df | 497 | goto exit; |
1da177e4 LT |
498 | |
499 | /* No such device (e.g., media were just removed) */ | |
500 | if (!get_capacity(disk)) | |
d4d7e5df | 501 | goto exit; |
1da177e4 LT |
502 | |
503 | bdev = bdget_disk(disk, 0); | |
504 | if (!bdev) | |
d4d7e5df | 505 | goto exit; |
1da177e4 | 506 | |
d4d7e5df | 507 | /* scan partition table, but suppress uevents */ |
1da177e4 | 508 | bdev->bd_invalidated = 1; |
d4d7e5df KS |
509 | disk->part_uevent_suppress = 1; |
510 | err = blkdev_get(bdev, FMODE_READ, 0); | |
511 | disk->part_uevent_suppress = 0; | |
512 | if (err < 0) | |
513 | goto exit; | |
1da177e4 | 514 | blkdev_put(bdev); |
d4d7e5df KS |
515 | |
516 | exit: | |
517 | /* announce disk after possible partitions are already created */ | |
518 | kobject_uevent(&disk->kobj, KOBJ_ADD); | |
519 | ||
520 | /* announce possible partitions */ | |
521 | for (i = 1; i < disk->minors; i++) { | |
522 | p = disk->part[i-1]; | |
523 | if (!p || !p->nr_sects) | |
524 | continue; | |
525 | kobject_uevent(&p->kobj, KOBJ_ADD); | |
526 | } | |
1da177e4 LT |
527 | } |
528 | ||
529 | int rescan_partitions(struct gendisk *disk, struct block_device *bdev) | |
530 | { | |
531 | struct parsed_partitions *state; | |
532 | int p, res; | |
533 | ||
534 | if (bdev->bd_part_count) | |
535 | return -EBUSY; | |
536 | res = invalidate_partition(disk, 0); | |
537 | if (res) | |
538 | return res; | |
539 | bdev->bd_invalidated = 0; | |
540 | for (p = 1; p < disk->minors; p++) | |
541 | delete_partition(disk, p); | |
542 | if (disk->fops->revalidate_disk) | |
543 | disk->fops->revalidate_disk(disk); | |
544 | if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) | |
545 | return 0; | |
5127d002 | 546 | if (IS_ERR(state)) /* I/O error reading the partition table */ |
b74a2f09 | 547 | return -EIO; |
1da177e4 LT |
548 | for (p = 1; p < state->limit; p++) { |
549 | sector_t size = state->parts[p].size; | |
550 | sector_t from = state->parts[p].from; | |
551 | if (!size) | |
552 | continue; | |
98bd34ea MM |
553 | if (from + size > get_capacity(disk)) { |
554 | printk(" %s: p%d exceeds device capacity\n", | |
555 | disk->disk_name, p); | |
556 | } | |
d18d7682 | 557 | add_partition(disk, p, from, size, state->parts[p].flags); |
1da177e4 | 558 | #ifdef CONFIG_BLK_DEV_MD |
d18d7682 | 559 | if (state->parts[p].flags & ADDPART_FLAG_RAID) |
1da177e4 LT |
560 | md_autodetect_dev(bdev->bd_dev+p); |
561 | #endif | |
562 | } | |
563 | kfree(state); | |
564 | return 0; | |
565 | } | |
566 | ||
567 | unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) | |
568 | { | |
569 | struct address_space *mapping = bdev->bd_inode->i_mapping; | |
570 | struct page *page; | |
571 | ||
090d2b18 PE |
572 | page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), |
573 | NULL); | |
1da177e4 | 574 | if (!IS_ERR(page)) { |
1da177e4 LT |
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 | } |