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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/slab.h> |
20 | #include <linux/kmod.h> |
21 | #include <linux/ctype.h> |
22 | #include <linux/genhd.h> |
23 | #include <linux/blktrace_api.h> |
24 | |
25 | #include "check.h" |
26 | |
27 | #include "acorn.h" |
28 | #include "amiga.h" |
29 | #include "atari.h" |
30 | #include "ldm.h" |
31 | #include "mac.h" |
32 | #include "msdos.h" |
33 | #include "osf.h" |
34 | #include "sgi.h" |
35 | #include "sun.h" |
36 | #include "ibm.h" |
37 | #include "ultrix.h" |
38 | #include "efi.h" |
39 | #include "karma.h" |
40 | #include "sysv68.h" |
41 | |
42 | #ifdef CONFIG_BLK_DEV_MD |
43 | extern void md_autodetect_dev(dev_t dev); |
44 | #endif |
45 | |
46 | int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/ |
47 | |
48 | static int (*check_part[])(struct parsed_partitions *, struct block_device *) = { |
49 | /* |
50 | * Probe partition formats with tables at disk address 0 |
51 | * that also have an ADFS boot block at 0xdc0. |
52 | */ |
53 | #ifdef CONFIG_ACORN_PARTITION_ICS |
54 | adfspart_check_ICS, |
55 | #endif |
56 | #ifdef CONFIG_ACORN_PARTITION_POWERTEC |
57 | adfspart_check_POWERTEC, |
58 | #endif |
59 | #ifdef CONFIG_ACORN_PARTITION_EESOX |
60 | adfspart_check_EESOX, |
61 | #endif |
62 | |
63 | /* |
64 | * Now move on to formats that only have partition info at |
65 | * disk address 0xdc0. Since these may also have stale |
66 | * PC/BIOS partition tables, they need to come before |
67 | * the msdos entry. |
68 | */ |
69 | #ifdef CONFIG_ACORN_PARTITION_CUMANA |
70 | adfspart_check_CUMANA, |
71 | #endif |
72 | #ifdef CONFIG_ACORN_PARTITION_ADFS |
73 | adfspart_check_ADFS, |
74 | #endif |
75 | |
76 | #ifdef CONFIG_EFI_PARTITION |
77 | efi_partition, /* this must come before msdos */ |
78 | #endif |
79 | #ifdef CONFIG_SGI_PARTITION |
80 | sgi_partition, |
81 | #endif |
82 | #ifdef CONFIG_LDM_PARTITION |
83 | ldm_partition, /* this must come before msdos */ |
84 | #endif |
85 | #ifdef CONFIG_MSDOS_PARTITION |
86 | msdos_partition, |
87 | #endif |
88 | #ifdef CONFIG_OSF_PARTITION |
89 | osf_partition, |
90 | #endif |
91 | #ifdef CONFIG_SUN_PARTITION |
92 | sun_partition, |
93 | #endif |
94 | #ifdef CONFIG_AMIGA_PARTITION |
95 | amiga_partition, |
96 | #endif |
97 | #ifdef CONFIG_ATARI_PARTITION |
98 | atari_partition, |
99 | #endif |
100 | #ifdef CONFIG_MAC_PARTITION |
101 | mac_partition, |
102 | #endif |
103 | #ifdef CONFIG_ULTRIX_PARTITION |
104 | ultrix_partition, |
105 | #endif |
106 | #ifdef CONFIG_IBM_PARTITION |
107 | ibm_partition, |
108 | #endif |
109 | #ifdef CONFIG_KARMA_PARTITION |
110 | karma_partition, |
111 | #endif |
112 | #ifdef CONFIG_SYSV68_PARTITION |
113 | sysv68_partition, |
114 | #endif |
115 | NULL |
116 | }; |
117 | |
118 | /* |
119 | * disk_name() is used by partition check code and the genhd driver. |
120 | * It formats the devicename of the indicated disk into |
121 | * the supplied buffer (of size at least 32), and returns |
122 | * a pointer to that same buffer (for convenience). |
123 | */ |
124 | |
125 | char *disk_name(struct gendisk *hd, int partno, char *buf) |
126 | { |
127 | if (!partno) |
128 | snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); |
129 | else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) |
130 | snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno); |
131 | else |
132 | snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno); |
133 | |
134 | return buf; |
135 | } |
136 | |
137 | const char *bdevname(struct block_device *bdev, char *buf) |
138 | { |
139 | return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf); |
140 | } |
141 | |
142 | EXPORT_SYMBOL(bdevname); |
143 | |
144 | /* |
145 | * There's very little reason to use this, you should really |
146 | * have a struct block_device just about everywhere and use |
147 | * bdevname() instead. |
148 | */ |
149 | const char *__bdevname(dev_t dev, char *buffer) |
150 | { |
151 | scnprintf(buffer, BDEVNAME_SIZE, "unknown-block(%u,%u)", |
152 | MAJOR(dev), MINOR(dev)); |
153 | return buffer; |
154 | } |
155 | |
156 | EXPORT_SYMBOL(__bdevname); |
157 | |
158 | static struct parsed_partitions * |
159 | check_partition(struct gendisk *hd, struct block_device *bdev) |
160 | { |
161 | struct parsed_partitions *state; |
162 | int i, res, err; |
163 | |
164 | state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL); |
165 | if (!state) |
166 | return NULL; |
167 | |
168 | disk_name(hd, 0, state->name); |
169 | printk(KERN_INFO " %s:", state->name); |
170 | if (isdigit(state->name[strlen(state->name)-1])) |
171 | sprintf(state->name, "p"); |
172 | |
173 | state->limit = disk_max_parts(hd); |
174 | i = res = err = 0; |
175 | while (!res && check_part[i]) { |
176 | memset(&state->parts, 0, sizeof(state->parts)); |
177 | res = check_part[i++](state, bdev); |
178 | if (res < 0) { |
179 | /* We have hit an I/O error which we don't report now. |
180 | * But record it, and let the others do their job. |
181 | */ |
182 | err = res; |
183 | res = 0; |
184 | } |
185 | |
186 | } |
187 | if (res > 0) |
188 | return state; |
189 | if (err) |
190 | /* The partition is unrecognized. So report I/O errors if there were any */ |
191 | res = err; |
192 | if (!res) |
193 | printk(" unknown partition table\n"); |
194 | else if (warn_no_part) |
195 | printk(" unable to read partition table\n"); |
196 | kfree(state); |
197 | return ERR_PTR(res); |
198 | } |
199 | |
200 | static ssize_t part_partition_show(struct device *dev, |
201 | struct device_attribute *attr, char *buf) |
202 | { |
203 | struct hd_struct *p = dev_to_part(dev); |
204 | |
205 | return sprintf(buf, "%d\n", p->partno); |
206 | } |
207 | |
208 | static ssize_t part_start_show(struct device *dev, |
209 | struct device_attribute *attr, char *buf) |
210 | { |
211 | struct hd_struct *p = dev_to_part(dev); |
212 | |
213 | return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect); |
214 | } |
215 | |
216 | ssize_t part_size_show(struct device *dev, |
217 | struct device_attribute *attr, char *buf) |
218 | { |
219 | struct hd_struct *p = dev_to_part(dev); |
220 | return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects); |
221 | } |
222 | |
223 | ssize_t part_alignment_offset_show(struct device *dev, |
224 | struct device_attribute *attr, char *buf) |
225 | { |
226 | struct hd_struct *p = dev_to_part(dev); |
227 | return sprintf(buf, "%llu\n", (unsigned long long)p->alignment_offset); |
228 | } |
229 | |
230 | ssize_t part_discard_alignment_show(struct device *dev, |
231 | struct device_attribute *attr, char *buf) |
232 | { |
233 | struct hd_struct *p = dev_to_part(dev); |
234 | return sprintf(buf, "%u\n", p->discard_alignment); |
235 | } |
236 | |
237 | ssize_t part_stat_show(struct device *dev, |
238 | struct device_attribute *attr, char *buf) |
239 | { |
240 | struct hd_struct *p = dev_to_part(dev); |
241 | int cpu; |
242 | |
243 | cpu = part_stat_lock(); |
244 | part_round_stats(cpu, p); |
245 | part_stat_unlock(); |
246 | return sprintf(buf, |
247 | "%8lu %8lu %8llu %8u " |
248 | "%8lu %8lu %8llu %8u " |
249 | "%8u %8u %8u" |
250 | "\n", |
251 | part_stat_read(p, ios[READ]), |
252 | part_stat_read(p, merges[READ]), |
253 | (unsigned long long)part_stat_read(p, sectors[READ]), |
254 | jiffies_to_msecs(part_stat_read(p, ticks[READ])), |
255 | part_stat_read(p, ios[WRITE]), |
256 | part_stat_read(p, merges[WRITE]), |
257 | (unsigned long long)part_stat_read(p, sectors[WRITE]), |
258 | jiffies_to_msecs(part_stat_read(p, ticks[WRITE])), |
259 | part_in_flight(p), |
260 | jiffies_to_msecs(part_stat_read(p, io_ticks)), |
261 | jiffies_to_msecs(part_stat_read(p, time_in_queue))); |
262 | } |
263 | |
264 | ssize_t part_inflight_show(struct device *dev, |
265 | struct device_attribute *attr, char *buf) |
266 | { |
267 | struct hd_struct *p = dev_to_part(dev); |
268 | |
269 | return sprintf(buf, "%8u %8u\n", p->in_flight[0], p->in_flight[1]); |
270 | } |
271 | |
272 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
273 | ssize_t part_fail_show(struct device *dev, |
274 | struct device_attribute *attr, char *buf) |
275 | { |
276 | struct hd_struct *p = dev_to_part(dev); |
277 | |
278 | return sprintf(buf, "%d\n", p->make_it_fail); |
279 | } |
280 | |
281 | ssize_t part_fail_store(struct device *dev, |
282 | struct device_attribute *attr, |
283 | const char *buf, size_t count) |
284 | { |
285 | struct hd_struct *p = dev_to_part(dev); |
286 | int i; |
287 | |
288 | if (count > 0 && sscanf(buf, "%d", &i) > 0) |
289 | p->make_it_fail = (i == 0) ? 0 : 1; |
290 | |
291 | return count; |
292 | } |
293 | #endif |
294 | |
295 | static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL); |
296 | static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL); |
297 | static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL); |
298 | static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL); |
299 | static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show, |
300 | NULL); |
301 | static DEVICE_ATTR(stat, S_IRUGO, part_stat_show, NULL); |
302 | static DEVICE_ATTR(inflight, S_IRUGO, part_inflight_show, NULL); |
303 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
304 | static struct device_attribute dev_attr_fail = |
305 | __ATTR(make-it-fail, S_IRUGO|S_IWUSR, part_fail_show, part_fail_store); |
306 | #endif |
307 | |
308 | static struct attribute *part_attrs[] = { |
309 | &dev_attr_partition.attr, |
310 | &dev_attr_start.attr, |
311 | &dev_attr_size.attr, |
312 | &dev_attr_alignment_offset.attr, |
313 | &dev_attr_discard_alignment.attr, |
314 | &dev_attr_stat.attr, |
315 | &dev_attr_inflight.attr, |
316 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
317 | &dev_attr_fail.attr, |
318 | #endif |
319 | NULL |
320 | }; |
321 | |
322 | static struct attribute_group part_attr_group = { |
323 | .attrs = part_attrs, |
324 | }; |
325 | |
326 | static const struct attribute_group *part_attr_groups[] = { |
327 | &part_attr_group, |
328 | #ifdef CONFIG_BLK_DEV_IO_TRACE |
329 | &blk_trace_attr_group, |
330 | #endif |
331 | NULL |
332 | }; |
333 | |
334 | static void part_release(struct device *dev) |
335 | { |
336 | struct hd_struct *p = dev_to_part(dev); |
337 | free_part_stats(p); |
338 | kfree(p); |
339 | } |
340 | |
341 | struct device_type part_type = { |
342 | .name = "partition", |
343 | .groups = part_attr_groups, |
344 | .release = part_release, |
345 | }; |
346 | |
347 | static void delete_partition_rcu_cb(struct rcu_head *head) |
348 | { |
349 | struct hd_struct *part = container_of(head, struct hd_struct, rcu_head); |
350 | |
351 | part->start_sect = 0; |
352 | part->nr_sects = 0; |
353 | part_stat_set_all(part, 0); |
354 | put_device(part_to_dev(part)); |
355 | } |
356 | |
357 | void delete_partition(struct gendisk *disk, int partno) |
358 | { |
359 | struct disk_part_tbl *ptbl = disk->part_tbl; |
360 | struct hd_struct *part; |
361 | |
362 | if (partno >= ptbl->len) |
363 | return; |
364 | |
365 | part = ptbl->part[partno]; |
366 | if (!part) |
367 | return; |
368 | |
369 | blk_free_devt(part_devt(part)); |
370 | rcu_assign_pointer(ptbl->part[partno], NULL); |
371 | rcu_assign_pointer(ptbl->last_lookup, NULL); |
372 | kobject_put(part->holder_dir); |
373 | device_del(part_to_dev(part)); |
374 | |
375 | call_rcu(&part->rcu_head, delete_partition_rcu_cb); |
376 | } |
377 | |
378 | static ssize_t whole_disk_show(struct device *dev, |
379 | struct device_attribute *attr, char *buf) |
380 | { |
381 | return 0; |
382 | } |
383 | static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH, |
384 | whole_disk_show, NULL); |
385 | |
386 | struct hd_struct *add_partition(struct gendisk *disk, int partno, |
387 | sector_t start, sector_t len, int flags) |
388 | { |
389 | struct hd_struct *p; |
390 | dev_t devt = MKDEV(0, 0); |
391 | struct device *ddev = disk_to_dev(disk); |
392 | struct device *pdev; |
393 | struct disk_part_tbl *ptbl; |
394 | const char *dname; |
395 | int err; |
396 | |
397 | err = disk_expand_part_tbl(disk, partno); |
398 | if (err) |
399 | return ERR_PTR(err); |
400 | ptbl = disk->part_tbl; |
401 | |
402 | if (ptbl->part[partno]) |
403 | return ERR_PTR(-EBUSY); |
404 | |
405 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
406 | if (!p) |
407 | return ERR_PTR(-EBUSY); |
408 | |
409 | if (!init_part_stats(p)) { |
410 | err = -ENOMEM; |
411 | goto out_free; |
412 | } |
413 | pdev = part_to_dev(p); |
414 | |
415 | p->start_sect = start; |
416 | p->alignment_offset = |
417 | queue_limit_alignment_offset(&disk->queue->limits, start); |
418 | p->discard_alignment = |
419 | queue_limit_discard_alignment(&disk->queue->limits, start); |
420 | p->nr_sects = len; |
421 | p->partno = partno; |
422 | p->policy = get_disk_ro(disk); |
423 | |
424 | dname = dev_name(ddev); |
425 | if (isdigit(dname[strlen(dname) - 1])) |
426 | dev_set_name(pdev, "%sp%d", dname, partno); |
427 | else |
428 | dev_set_name(pdev, "%s%d", dname, partno); |
429 | |
430 | device_initialize(pdev); |
431 | pdev->class = &block_class; |
432 | pdev->type = &part_type; |
433 | pdev->parent = ddev; |
434 | |
435 | err = blk_alloc_devt(p, &devt); |
436 | if (err) |
437 | goto out_free_stats; |
438 | pdev->devt = devt; |
439 | |
440 | /* delay uevent until 'holders' subdir is created */ |
441 | dev_set_uevent_suppress(pdev, 1); |
442 | err = device_add(pdev); |
443 | if (err) |
444 | goto out_put; |
445 | |
446 | err = -ENOMEM; |
447 | p->holder_dir = kobject_create_and_add("holders", &pdev->kobj); |
448 | if (!p->holder_dir) |
449 | goto out_del; |
450 | |
451 | dev_set_uevent_suppress(pdev, 0); |
452 | if (flags & ADDPART_FLAG_WHOLEDISK) { |
453 | err = device_create_file(pdev, &dev_attr_whole_disk); |
454 | if (err) |
455 | goto out_del; |
456 | } |
457 | |
458 | /* everything is up and running, commence */ |
459 | INIT_RCU_HEAD(&p->rcu_head); |
460 | rcu_assign_pointer(ptbl->part[partno], p); |
461 | |
462 | /* suppress uevent if the disk supresses it */ |
463 | if (!dev_get_uevent_suppress(ddev)) |
464 | kobject_uevent(&pdev->kobj, KOBJ_ADD); |
465 | |
466 | return p; |
467 | |
468 | out_free_stats: |
469 | free_part_stats(p); |
470 | out_free: |
471 | kfree(p); |
472 | return ERR_PTR(err); |
473 | out_del: |
474 | kobject_put(p->holder_dir); |
475 | device_del(pdev); |
476 | out_put: |
477 | put_device(pdev); |
478 | blk_free_devt(devt); |
479 | return ERR_PTR(err); |
480 | } |
481 | |
482 | /* Not exported, helper to add_disk(). */ |
483 | void register_disk(struct gendisk *disk) |
484 | { |
485 | struct device *ddev = disk_to_dev(disk); |
486 | struct block_device *bdev; |
487 | struct disk_part_iter piter; |
488 | struct hd_struct *part; |
489 | int err; |
490 | |
491 | ddev->parent = disk->driverfs_dev; |
492 | |
493 | dev_set_name(ddev, disk->disk_name); |
494 | |
495 | /* delay uevents, until we scanned partition table */ |
496 | dev_set_uevent_suppress(ddev, 1); |
497 | |
498 | if (device_add(ddev)) |
499 | return; |
500 | #ifndef CONFIG_SYSFS_DEPRECATED |
501 | err = sysfs_create_link(block_depr, &ddev->kobj, |
502 | kobject_name(&ddev->kobj)); |
503 | if (err) { |
504 | device_del(ddev); |
505 | return; |
506 | } |
507 | #endif |
508 | disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj); |
509 | disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj); |
510 | |
511 | /* No minors to use for partitions */ |
512 | if (!disk_partitionable(disk)) |
513 | goto exit; |
514 | |
515 | /* No such device (e.g., media were just removed) */ |
516 | if (!get_capacity(disk)) |
517 | goto exit; |
518 | |
519 | bdev = bdget_disk(disk, 0); |
520 | if (!bdev) |
521 | goto exit; |
522 | |
523 | bdev->bd_invalidated = 1; |
524 | err = blkdev_get(bdev, FMODE_READ); |
525 | if (err < 0) |
526 | goto exit; |
527 | blkdev_put(bdev, FMODE_READ); |
528 | |
529 | exit: |
530 | /* announce disk after possible partitions are created */ |
531 | dev_set_uevent_suppress(ddev, 0); |
532 | kobject_uevent(&ddev->kobj, KOBJ_ADD); |
533 | |
534 | /* announce possible partitions */ |
535 | disk_part_iter_init(&piter, disk, 0); |
536 | while ((part = disk_part_iter_next(&piter))) |
537 | kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD); |
538 | disk_part_iter_exit(&piter); |
539 | } |
540 | |
541 | int rescan_partitions(struct gendisk *disk, struct block_device *bdev) |
542 | { |
543 | struct disk_part_iter piter; |
544 | struct hd_struct *part; |
545 | struct parsed_partitions *state; |
546 | int p, highest, res; |
547 | |
548 | if (bdev->bd_part_count) |
549 | return -EBUSY; |
550 | res = invalidate_partition(disk, 0); |
551 | if (res) |
552 | return res; |
553 | |
554 | disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY); |
555 | while ((part = disk_part_iter_next(&piter))) |
556 | delete_partition(disk, part->partno); |
557 | disk_part_iter_exit(&piter); |
558 | |
559 | if (disk->fops->revalidate_disk) |
560 | disk->fops->revalidate_disk(disk); |
561 | check_disk_size_change(disk, bdev); |
562 | bdev->bd_invalidated = 0; |
563 | if (!get_capacity(disk) || !(state = check_partition(disk, bdev))) |
564 | return 0; |
565 | if (IS_ERR(state)) /* I/O error reading the partition table */ |
566 | return -EIO; |
567 | |
568 | /* tell userspace that the media / partition table may have changed */ |
569 | kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE); |
570 | |
571 | /* Detect the highest partition number and preallocate |
572 | * disk->part_tbl. This is an optimization and not strictly |
573 | * necessary. |
574 | */ |
575 | for (p = 1, highest = 0; p < state->limit; p++) |
576 | if (state->parts[p].size) |
577 | highest = p; |
578 | |
579 | disk_expand_part_tbl(disk, highest); |
580 | |
581 | /* add partitions */ |
582 | for (p = 1; p < state->limit; p++) { |
583 | sector_t size, from; |
584 | try_scan: |
585 | size = state->parts[p].size; |
586 | if (!size) |
587 | continue; |
588 | |
589 | from = state->parts[p].from; |
590 | if (from >= get_capacity(disk)) { |
591 | printk(KERN_WARNING |
592 | "%s: p%d ignored, start %llu is behind the end of the disk\n", |
593 | disk->disk_name, p, (unsigned long long) from); |
594 | continue; |
595 | } |
596 | |
597 | if (from + size > get_capacity(disk)) { |
598 | const struct block_device_operations *bdops = disk->fops; |
599 | unsigned long long capacity; |
600 | |
601 | printk(KERN_WARNING |
602 | "%s: p%d size %llu exceeds device capacity, ", |
603 | disk->disk_name, p, (unsigned long long) size); |
604 | |
605 | if (bdops->set_capacity && |
606 | (disk->flags & GENHD_FL_NATIVE_CAPACITY) == 0) { |
607 | printk(KERN_CONT "enabling native capacity\n"); |
608 | capacity = bdops->set_capacity(disk, ~0ULL); |
609 | disk->flags |= GENHD_FL_NATIVE_CAPACITY; |
610 | if (capacity > get_capacity(disk)) { |
611 | set_capacity(disk, capacity); |
612 | check_disk_size_change(disk, bdev); |
613 | bdev->bd_invalidated = 0; |
614 | } |
615 | goto try_scan; |
616 | } else { |
617 | /* |
618 | * we can not ignore partitions of broken tables |
619 | * created by for example camera firmware, but |
620 | * we limit them to the end of the disk to avoid |
621 | * creating invalid block devices |
622 | */ |
623 | printk(KERN_CONT "limited to end of disk\n"); |
624 | size = get_capacity(disk) - from; |
625 | } |
626 | } |
627 | part = add_partition(disk, p, from, size, |
628 | state->parts[p].flags); |
629 | if (IS_ERR(part)) { |
630 | printk(KERN_ERR " %s: p%d could not be added: %ld\n", |
631 | disk->disk_name, p, -PTR_ERR(part)); |
632 | continue; |
633 | } |
634 | #ifdef CONFIG_BLK_DEV_MD |
635 | if (state->parts[p].flags & ADDPART_FLAG_RAID) |
636 | md_autodetect_dev(part_to_dev(part)->devt); |
637 | #endif |
638 | } |
639 | kfree(state); |
640 | return 0; |
641 | } |
642 | |
643 | unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) |
644 | { |
645 | struct address_space *mapping = bdev->bd_inode->i_mapping; |
646 | struct page *page; |
647 | |
648 | page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), |
649 | NULL); |
650 | if (!IS_ERR(page)) { |
651 | if (PageError(page)) |
652 | goto fail; |
653 | p->v = page; |
654 | return (unsigned char *)page_address(page) + ((n & ((1 << (PAGE_CACHE_SHIFT - 9)) - 1)) << 9); |
655 | fail: |
656 | page_cache_release(page); |
657 | } |
658 | p->v = NULL; |
659 | return NULL; |
660 | } |
661 | |
662 | EXPORT_SYMBOL(read_dev_sector); |
663 | |
664 | void del_gendisk(struct gendisk *disk) |
665 | { |
666 | struct disk_part_iter piter; |
667 | struct hd_struct *part; |
668 | |
669 | /* invalidate stuff */ |
670 | disk_part_iter_init(&piter, disk, |
671 | DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE); |
672 | while ((part = disk_part_iter_next(&piter))) { |
673 | invalidate_partition(disk, part->partno); |
674 | delete_partition(disk, part->partno); |
675 | } |
676 | disk_part_iter_exit(&piter); |
677 | |
678 | invalidate_partition(disk, 0); |
679 | blk_free_devt(disk_to_dev(disk)->devt); |
680 | set_capacity(disk, 0); |
681 | disk->flags &= ~GENHD_FL_UP; |
682 | unlink_gendisk(disk); |
683 | part_stat_set_all(&disk->part0, 0); |
684 | disk->part0.stamp = 0; |
685 | |
686 | kobject_put(disk->part0.holder_dir); |
687 | kobject_put(disk->slave_dir); |
688 | disk->driverfs_dev = NULL; |
689 | #ifndef CONFIG_SYSFS_DEPRECATED |
690 | sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk))); |
691 | #endif |
692 | device_del(disk_to_dev(disk)); |
693 | } |
694 |
Branches:
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9