xref: /openbmc/linux/block/genhd.c (revision 87c2ce3b)
1 /*
2  *  gendisk handling
3  */
4 
5 #include <linux/config.h>
6 #include <linux/module.h>
7 #include <linux/fs.h>
8 #include <linux/genhd.h>
9 #include <linux/kernel.h>
10 #include <linux/blkdev.h>
11 #include <linux/init.h>
12 #include <linux/spinlock.h>
13 #include <linux/seq_file.h>
14 #include <linux/slab.h>
15 #include <linux/kmod.h>
16 #include <linux/kobj_map.h>
17 #include <linux/buffer_head.h>
18 
19 #define MAX_PROBE_HASH 255	/* random */
20 
21 static struct subsystem block_subsys;
22 
23 static DECLARE_MUTEX(block_subsys_sem);
24 
25 /*
26  * Can be deleted altogether. Later.
27  *
28  */
29 static struct blk_major_name {
30 	struct blk_major_name *next;
31 	int major;
32 	char name[16];
33 } *major_names[MAX_PROBE_HASH];
34 
35 /* index in the above - for now: assume no multimajor ranges */
36 static inline int major_to_index(int major)
37 {
38 	return major % MAX_PROBE_HASH;
39 }
40 
41 #ifdef CONFIG_PROC_FS
42 /* get block device names in somewhat random order */
43 int get_blkdev_list(char *p, int used)
44 {
45 	struct blk_major_name *n;
46 	int i, len;
47 
48 	len = snprintf(p, (PAGE_SIZE-used), "\nBlock devices:\n");
49 
50 	down(&block_subsys_sem);
51 	for (i = 0; i < ARRAY_SIZE(major_names); i++) {
52 		for (n = major_names[i]; n; n = n->next) {
53 			/*
54 			 * If the curent string plus the 5 extra characters
55 			 * in the line would run us off the page, then we're done
56 			 */
57 			if ((len + used + strlen(n->name) + 5) >= PAGE_SIZE)
58 				goto page_full;
59 			len += sprintf(p+len, "%3d %s\n",
60 				       n->major, n->name);
61 		}
62 	}
63 page_full:
64 	up(&block_subsys_sem);
65 
66 	return len;
67 }
68 #endif
69 
70 int register_blkdev(unsigned int major, const char *name)
71 {
72 	struct blk_major_name **n, *p;
73 	int index, ret = 0;
74 
75 	down(&block_subsys_sem);
76 
77 	/* temporary */
78 	if (major == 0) {
79 		for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {
80 			if (major_names[index] == NULL)
81 				break;
82 		}
83 
84 		if (index == 0) {
85 			printk("register_blkdev: failed to get major for %s\n",
86 			       name);
87 			ret = -EBUSY;
88 			goto out;
89 		}
90 		major = index;
91 		ret = major;
92 	}
93 
94 	p = kmalloc(sizeof(struct blk_major_name), GFP_KERNEL);
95 	if (p == NULL) {
96 		ret = -ENOMEM;
97 		goto out;
98 	}
99 
100 	p->major = major;
101 	strlcpy(p->name, name, sizeof(p->name));
102 	p->next = NULL;
103 	index = major_to_index(major);
104 
105 	for (n = &major_names[index]; *n; n = &(*n)->next) {
106 		if ((*n)->major == major)
107 			break;
108 	}
109 	if (!*n)
110 		*n = p;
111 	else
112 		ret = -EBUSY;
113 
114 	if (ret < 0) {
115 		printk("register_blkdev: cannot get major %d for %s\n",
116 		       major, name);
117 		kfree(p);
118 	}
119 out:
120 	up(&block_subsys_sem);
121 	return ret;
122 }
123 
124 EXPORT_SYMBOL(register_blkdev);
125 
126 /* todo: make void - error printk here */
127 int unregister_blkdev(unsigned int major, const char *name)
128 {
129 	struct blk_major_name **n;
130 	struct blk_major_name *p = NULL;
131 	int index = major_to_index(major);
132 	int ret = 0;
133 
134 	down(&block_subsys_sem);
135 	for (n = &major_names[index]; *n; n = &(*n)->next)
136 		if ((*n)->major == major)
137 			break;
138 	if (!*n || strcmp((*n)->name, name))
139 		ret = -EINVAL;
140 	else {
141 		p = *n;
142 		*n = p->next;
143 	}
144 	up(&block_subsys_sem);
145 	kfree(p);
146 
147 	return ret;
148 }
149 
150 EXPORT_SYMBOL(unregister_blkdev);
151 
152 static struct kobj_map *bdev_map;
153 
154 /*
155  * Register device numbers dev..(dev+range-1)
156  * range must be nonzero
157  * The hash chain is sorted on range, so that subranges can override.
158  */
159 void blk_register_region(dev_t dev, unsigned long range, struct module *module,
160 			 struct kobject *(*probe)(dev_t, int *, void *),
161 			 int (*lock)(dev_t, void *), void *data)
162 {
163 	kobj_map(bdev_map, dev, range, module, probe, lock, data);
164 }
165 
166 EXPORT_SYMBOL(blk_register_region);
167 
168 void blk_unregister_region(dev_t dev, unsigned long range)
169 {
170 	kobj_unmap(bdev_map, dev, range);
171 }
172 
173 EXPORT_SYMBOL(blk_unregister_region);
174 
175 static struct kobject *exact_match(dev_t dev, int *part, void *data)
176 {
177 	struct gendisk *p = data;
178 	return &p->kobj;
179 }
180 
181 static int exact_lock(dev_t dev, void *data)
182 {
183 	struct gendisk *p = data;
184 
185 	if (!get_disk(p))
186 		return -1;
187 	return 0;
188 }
189 
190 /**
191  * add_disk - add partitioning information to kernel list
192  * @disk: per-device partitioning information
193  *
194  * This function registers the partitioning information in @disk
195  * with the kernel.
196  */
197 void add_disk(struct gendisk *disk)
198 {
199 	disk->flags |= GENHD_FL_UP;
200 	blk_register_region(MKDEV(disk->major, disk->first_minor),
201 			    disk->minors, NULL, exact_match, exact_lock, disk);
202 	register_disk(disk);
203 	blk_register_queue(disk);
204 }
205 
206 EXPORT_SYMBOL(add_disk);
207 EXPORT_SYMBOL(del_gendisk);	/* in partitions/check.c */
208 
209 void unlink_gendisk(struct gendisk *disk)
210 {
211 	blk_unregister_queue(disk);
212 	blk_unregister_region(MKDEV(disk->major, disk->first_minor),
213 			      disk->minors);
214 }
215 
216 #define to_disk(obj) container_of(obj,struct gendisk,kobj)
217 
218 /**
219  * get_gendisk - get partitioning information for a given device
220  * @dev: device to get partitioning information for
221  *
222  * This function gets the structure containing partitioning
223  * information for the given device @dev.
224  */
225 struct gendisk *get_gendisk(dev_t dev, int *part)
226 {
227 	struct kobject *kobj = kobj_lookup(bdev_map, dev, part);
228 	return  kobj ? to_disk(kobj) : NULL;
229 }
230 
231 #ifdef CONFIG_PROC_FS
232 /* iterator */
233 static void *part_start(struct seq_file *part, loff_t *pos)
234 {
235 	struct list_head *p;
236 	loff_t l = *pos;
237 
238 	down(&block_subsys_sem);
239 	list_for_each(p, &block_subsys.kset.list)
240 		if (!l--)
241 			return list_entry(p, struct gendisk, kobj.entry);
242 	return NULL;
243 }
244 
245 static void *part_next(struct seq_file *part, void *v, loff_t *pos)
246 {
247 	struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
248 	++*pos;
249 	return p==&block_subsys.kset.list ? NULL :
250 		list_entry(p, struct gendisk, kobj.entry);
251 }
252 
253 static void part_stop(struct seq_file *part, void *v)
254 {
255 	up(&block_subsys_sem);
256 }
257 
258 static int show_partition(struct seq_file *part, void *v)
259 {
260 	struct gendisk *sgp = v;
261 	int n;
262 	char buf[BDEVNAME_SIZE];
263 
264 	if (&sgp->kobj.entry == block_subsys.kset.list.next)
265 		seq_puts(part, "major minor  #blocks  name\n\n");
266 
267 	/* Don't show non-partitionable removeable devices or empty devices */
268 	if (!get_capacity(sgp) ||
269 			(sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE)))
270 		return 0;
271 	if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
272 		return 0;
273 
274 	/* show the full disk and all non-0 size partitions of it */
275 	seq_printf(part, "%4d  %4d %10llu %s\n",
276 		sgp->major, sgp->first_minor,
277 		(unsigned long long)get_capacity(sgp) >> 1,
278 		disk_name(sgp, 0, buf));
279 	for (n = 0; n < sgp->minors - 1; n++) {
280 		if (!sgp->part[n])
281 			continue;
282 		if (sgp->part[n]->nr_sects == 0)
283 			continue;
284 		seq_printf(part, "%4d  %4d %10llu %s\n",
285 			sgp->major, n + 1 + sgp->first_minor,
286 			(unsigned long long)sgp->part[n]->nr_sects >> 1 ,
287 			disk_name(sgp, n + 1, buf));
288 	}
289 
290 	return 0;
291 }
292 
293 struct seq_operations partitions_op = {
294 	.start =part_start,
295 	.next =	part_next,
296 	.stop =	part_stop,
297 	.show =	show_partition
298 };
299 #endif
300 
301 
302 extern int blk_dev_init(void);
303 
304 static struct kobject *base_probe(dev_t dev, int *part, void *data)
305 {
306 	if (request_module("block-major-%d-%d", MAJOR(dev), MINOR(dev)) > 0)
307 		/* Make old-style 2.4 aliases work */
308 		request_module("block-major-%d", MAJOR(dev));
309 	return NULL;
310 }
311 
312 static int __init genhd_device_init(void)
313 {
314 	bdev_map = kobj_map_init(base_probe, &block_subsys_sem);
315 	blk_dev_init();
316 	subsystem_register(&block_subsys);
317 	return 0;
318 }
319 
320 subsys_initcall(genhd_device_init);
321 
322 
323 
324 /*
325  * kobject & sysfs bindings for block devices
326  */
327 static ssize_t disk_attr_show(struct kobject *kobj, struct attribute *attr,
328 			      char *page)
329 {
330 	struct gendisk *disk = to_disk(kobj);
331 	struct disk_attribute *disk_attr =
332 		container_of(attr,struct disk_attribute,attr);
333 	ssize_t ret = -EIO;
334 
335 	if (disk_attr->show)
336 		ret = disk_attr->show(disk,page);
337 	return ret;
338 }
339 
340 static ssize_t disk_attr_store(struct kobject * kobj, struct attribute * attr,
341 			       const char *page, size_t count)
342 {
343 	struct gendisk *disk = to_disk(kobj);
344 	struct disk_attribute *disk_attr =
345 		container_of(attr,struct disk_attribute,attr);
346 	ssize_t ret = 0;
347 
348 	if (disk_attr->store)
349 		ret = disk_attr->store(disk, page, count);
350 	return ret;
351 }
352 
353 static struct sysfs_ops disk_sysfs_ops = {
354 	.show	= &disk_attr_show,
355 	.store	= &disk_attr_store,
356 };
357 
358 static ssize_t disk_uevent_store(struct gendisk * disk,
359 				 const char *buf, size_t count)
360 {
361 	kobject_uevent(&disk->kobj, KOBJ_ADD);
362 	return count;
363 }
364 static ssize_t disk_dev_read(struct gendisk * disk, char *page)
365 {
366 	dev_t base = MKDEV(disk->major, disk->first_minor);
367 	return print_dev_t(page, base);
368 }
369 static ssize_t disk_range_read(struct gendisk * disk, char *page)
370 {
371 	return sprintf(page, "%d\n", disk->minors);
372 }
373 static ssize_t disk_removable_read(struct gendisk * disk, char *page)
374 {
375 	return sprintf(page, "%d\n",
376 		       (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
377 
378 }
379 static ssize_t disk_size_read(struct gendisk * disk, char *page)
380 {
381 	return sprintf(page, "%llu\n", (unsigned long long)get_capacity(disk));
382 }
383 
384 static ssize_t disk_stats_read(struct gendisk * disk, char *page)
385 {
386 	preempt_disable();
387 	disk_round_stats(disk);
388 	preempt_enable();
389 	return sprintf(page,
390 		"%8u %8u %8llu %8u "
391 		"%8u %8u %8llu %8u "
392 		"%8u %8u %8u"
393 		"\n",
394 		disk_stat_read(disk, ios[READ]),
395 		disk_stat_read(disk, merges[READ]),
396 		(unsigned long long)disk_stat_read(disk, sectors[READ]),
397 		jiffies_to_msecs(disk_stat_read(disk, ticks[READ])),
398 		disk_stat_read(disk, ios[WRITE]),
399 		disk_stat_read(disk, merges[WRITE]),
400 		(unsigned long long)disk_stat_read(disk, sectors[WRITE]),
401 		jiffies_to_msecs(disk_stat_read(disk, ticks[WRITE])),
402 		disk->in_flight,
403 		jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
404 		jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
405 }
406 static struct disk_attribute disk_attr_uevent = {
407 	.attr = {.name = "uevent", .mode = S_IWUSR },
408 	.store	= disk_uevent_store
409 };
410 static struct disk_attribute disk_attr_dev = {
411 	.attr = {.name = "dev", .mode = S_IRUGO },
412 	.show	= disk_dev_read
413 };
414 static struct disk_attribute disk_attr_range = {
415 	.attr = {.name = "range", .mode = S_IRUGO },
416 	.show	= disk_range_read
417 };
418 static struct disk_attribute disk_attr_removable = {
419 	.attr = {.name = "removable", .mode = S_IRUGO },
420 	.show	= disk_removable_read
421 };
422 static struct disk_attribute disk_attr_size = {
423 	.attr = {.name = "size", .mode = S_IRUGO },
424 	.show	= disk_size_read
425 };
426 static struct disk_attribute disk_attr_stat = {
427 	.attr = {.name = "stat", .mode = S_IRUGO },
428 	.show	= disk_stats_read
429 };
430 
431 static struct attribute * default_attrs[] = {
432 	&disk_attr_uevent.attr,
433 	&disk_attr_dev.attr,
434 	&disk_attr_range.attr,
435 	&disk_attr_removable.attr,
436 	&disk_attr_size.attr,
437 	&disk_attr_stat.attr,
438 	NULL,
439 };
440 
441 static void disk_release(struct kobject * kobj)
442 {
443 	struct gendisk *disk = to_disk(kobj);
444 	kfree(disk->random);
445 	kfree(disk->part);
446 	free_disk_stats(disk);
447 	kfree(disk);
448 }
449 
450 static struct kobj_type ktype_block = {
451 	.release	= disk_release,
452 	.sysfs_ops	= &disk_sysfs_ops,
453 	.default_attrs	= default_attrs,
454 };
455 
456 extern struct kobj_type ktype_part;
457 
458 static int block_uevent_filter(struct kset *kset, struct kobject *kobj)
459 {
460 	struct kobj_type *ktype = get_ktype(kobj);
461 
462 	return ((ktype == &ktype_block) || (ktype == &ktype_part));
463 }
464 
465 static int block_uevent(struct kset *kset, struct kobject *kobj, char **envp,
466 			 int num_envp, char *buffer, int buffer_size)
467 {
468 	struct kobj_type *ktype = get_ktype(kobj);
469 	struct device *physdev;
470 	struct gendisk *disk;
471 	struct hd_struct *part;
472 	int length = 0;
473 	int i = 0;
474 
475 	if (ktype == &ktype_block) {
476 		disk = container_of(kobj, struct gendisk, kobj);
477 		add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
478 			       &length, "MINOR=%u", disk->first_minor);
479 	} else if (ktype == &ktype_part) {
480 		disk = container_of(kobj->parent, struct gendisk, kobj);
481 		part = container_of(kobj, struct hd_struct, kobj);
482 		add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
483 			       &length, "MINOR=%u",
484 			       disk->first_minor + part->partno);
485 	} else
486 		return 0;
487 
488 	add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
489 		       "MAJOR=%u", disk->major);
490 
491 	/* add physical device, backing this device  */
492 	physdev = disk->driverfs_dev;
493 	if (physdev) {
494 		char *path = kobject_get_path(&physdev->kobj, GFP_KERNEL);
495 
496 		add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
497 			       &length, "PHYSDEVPATH=%s", path);
498 		kfree(path);
499 
500 		if (physdev->bus)
501 			add_uevent_var(envp, num_envp, &i,
502 				       buffer, buffer_size, &length,
503 				       "PHYSDEVBUS=%s",
504 				       physdev->bus->name);
505 
506 		if (physdev->driver)
507 			add_uevent_var(envp, num_envp, &i,
508 				       buffer, buffer_size, &length,
509 				       "PHYSDEVDRIVER=%s",
510 				       physdev->driver->name);
511 	}
512 
513 	/* terminate, set to next free slot, shrink available space */
514 	envp[i] = NULL;
515 	envp = &envp[i];
516 	num_envp -= i;
517 	buffer = &buffer[length];
518 	buffer_size -= length;
519 
520 	return 0;
521 }
522 
523 static struct kset_uevent_ops block_uevent_ops = {
524 	.filter		= block_uevent_filter,
525 	.uevent		= block_uevent,
526 };
527 
528 /* declare block_subsys. */
529 static decl_subsys(block, &ktype_block, &block_uevent_ops);
530 
531 
532 /*
533  * aggregate disk stat collector.  Uses the same stats that the sysfs
534  * entries do, above, but makes them available through one seq_file.
535  * Watching a few disks may be efficient through sysfs, but watching
536  * all of them will be more efficient through this interface.
537  *
538  * The output looks suspiciously like /proc/partitions with a bunch of
539  * extra fields.
540  */
541 
542 /* iterator */
543 static void *diskstats_start(struct seq_file *part, loff_t *pos)
544 {
545 	loff_t k = *pos;
546 	struct list_head *p;
547 
548 	down(&block_subsys_sem);
549 	list_for_each(p, &block_subsys.kset.list)
550 		if (!k--)
551 			return list_entry(p, struct gendisk, kobj.entry);
552 	return NULL;
553 }
554 
555 static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
556 {
557 	struct list_head *p = ((struct gendisk *)v)->kobj.entry.next;
558 	++*pos;
559 	return p==&block_subsys.kset.list ? NULL :
560 		list_entry(p, struct gendisk, kobj.entry);
561 }
562 
563 static void diskstats_stop(struct seq_file *part, void *v)
564 {
565 	up(&block_subsys_sem);
566 }
567 
568 static int diskstats_show(struct seq_file *s, void *v)
569 {
570 	struct gendisk *gp = v;
571 	char buf[BDEVNAME_SIZE];
572 	int n = 0;
573 
574 	/*
575 	if (&sgp->kobj.entry == block_subsys.kset.list.next)
576 		seq_puts(s,	"major minor name"
577 				"     rio rmerge rsect ruse wio wmerge "
578 				"wsect wuse running use aveq"
579 				"\n\n");
580 	*/
581 
582 	preempt_disable();
583 	disk_round_stats(gp);
584 	preempt_enable();
585 	seq_printf(s, "%4d %4d %s %u %u %llu %u %u %u %llu %u %u %u %u\n",
586 		gp->major, n + gp->first_minor, disk_name(gp, n, buf),
587 		disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
588 		(unsigned long long)disk_stat_read(gp, sectors[0]),
589 		jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
590 		disk_stat_read(gp, ios[1]), disk_stat_read(gp, merges[1]),
591 		(unsigned long long)disk_stat_read(gp, sectors[1]),
592 		jiffies_to_msecs(disk_stat_read(gp, ticks[1])),
593 		gp->in_flight,
594 		jiffies_to_msecs(disk_stat_read(gp, io_ticks)),
595 		jiffies_to_msecs(disk_stat_read(gp, time_in_queue)));
596 
597 	/* now show all non-0 size partitions of it */
598 	for (n = 0; n < gp->minors - 1; n++) {
599 		struct hd_struct *hd = gp->part[n];
600 
601 		if (hd && hd->nr_sects)
602 			seq_printf(s, "%4d %4d %s %u %u %u %u\n",
603 				gp->major, n + gp->first_minor + 1,
604 				disk_name(gp, n + 1, buf),
605 				hd->ios[0], hd->sectors[0],
606 				hd->ios[1], hd->sectors[1]);
607 	}
608 
609 	return 0;
610 }
611 
612 struct seq_operations diskstats_op = {
613 	.start	= diskstats_start,
614 	.next	= diskstats_next,
615 	.stop	= diskstats_stop,
616 	.show	= diskstats_show
617 };
618 
619 struct gendisk *alloc_disk(int minors)
620 {
621 	return alloc_disk_node(minors, -1);
622 }
623 
624 struct gendisk *alloc_disk_node(int minors, int node_id)
625 {
626 	struct gendisk *disk;
627 
628 	disk = kmalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
629 	if (disk) {
630 		memset(disk, 0, sizeof(struct gendisk));
631 		if (!init_disk_stats(disk)) {
632 			kfree(disk);
633 			return NULL;
634 		}
635 		if (minors > 1) {
636 			int size = (minors - 1) * sizeof(struct hd_struct *);
637 			disk->part = kmalloc_node(size, GFP_KERNEL, node_id);
638 			if (!disk->part) {
639 				kfree(disk);
640 				return NULL;
641 			}
642 			memset(disk->part, 0, size);
643 		}
644 		disk->minors = minors;
645 		kobj_set_kset_s(disk,block_subsys);
646 		kobject_init(&disk->kobj);
647 		rand_initialize_disk(disk);
648 	}
649 	return disk;
650 }
651 
652 EXPORT_SYMBOL(alloc_disk);
653 EXPORT_SYMBOL(alloc_disk_node);
654 
655 struct kobject *get_disk(struct gendisk *disk)
656 {
657 	struct module *owner;
658 	struct kobject *kobj;
659 
660 	if (!disk->fops)
661 		return NULL;
662 	owner = disk->fops->owner;
663 	if (owner && !try_module_get(owner))
664 		return NULL;
665 	kobj = kobject_get(&disk->kobj);
666 	if (kobj == NULL) {
667 		module_put(owner);
668 		return NULL;
669 	}
670 	return kobj;
671 
672 }
673 
674 EXPORT_SYMBOL(get_disk);
675 
676 void put_disk(struct gendisk *disk)
677 {
678 	if (disk)
679 		kobject_put(&disk->kobj);
680 }
681 
682 EXPORT_SYMBOL(put_disk);
683 
684 void set_device_ro(struct block_device *bdev, int flag)
685 {
686 	if (bdev->bd_contains != bdev)
687 		bdev->bd_part->policy = flag;
688 	else
689 		bdev->bd_disk->policy = flag;
690 }
691 
692 EXPORT_SYMBOL(set_device_ro);
693 
694 void set_disk_ro(struct gendisk *disk, int flag)
695 {
696 	int i;
697 	disk->policy = flag;
698 	for (i = 0; i < disk->minors - 1; i++)
699 		if (disk->part[i]) disk->part[i]->policy = flag;
700 }
701 
702 EXPORT_SYMBOL(set_disk_ro);
703 
704 int bdev_read_only(struct block_device *bdev)
705 {
706 	if (!bdev)
707 		return 0;
708 	else if (bdev->bd_contains != bdev)
709 		return bdev->bd_part->policy;
710 	else
711 		return bdev->bd_disk->policy;
712 }
713 
714 EXPORT_SYMBOL(bdev_read_only);
715 
716 int invalidate_partition(struct gendisk *disk, int index)
717 {
718 	int res = 0;
719 	struct block_device *bdev = bdget_disk(disk, index);
720 	if (bdev) {
721 		fsync_bdev(bdev);
722 		res = __invalidate_device(bdev);
723 		bdput(bdev);
724 	}
725 	return res;
726 }
727 
728 EXPORT_SYMBOL(invalidate_partition);
729