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block: create 'slaves' and 'holders' entries for hidden gendisks

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When creating nvme multipath devices we should populate the 'slaves' and
'holders' directorys properly to aid userspace topology detection.

Signed-off-by: Hannes Reinecke <hare@suse.com>
[hch: split from a larger patch]
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hannes Reinecke 2017-11-09 17:57:06 +01:00 committed by Jens Axboe
parent 5b85b826b8
commit 17eac09963
1 changed files with 7 additions and 7 deletions
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14
block/genhd.c
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@ -585,14 +585,14 @@ static void register_disk(struct device *parent, struct gendisk *disk)
*/ */
pm_runtime_set_memalloc_noio(ddev, true); pm_runtime_set_memalloc_noio(ddev, true);
disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
if (disk->flags & GENHD_FL_HIDDEN) { if (disk->flags & GENHD_FL_HIDDEN) {
dev_set_uevent_suppress(ddev, 0); dev_set_uevent_suppress(ddev, 0);
return; return;
} }
disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
/* No minors to use for partitions */ /* No minors to use for partitions */
if (!disk_part_scan_enabled(disk)) if (!disk_part_scan_enabled(disk))
goto exit; goto exit;
@ -728,11 +728,11 @@ void del_gendisk(struct gendisk *disk)
WARN_ON(1); WARN_ON(1);
} }
if (!(disk->flags & GENHD_FL_HIDDEN)) { if (!(disk->flags & GENHD_FL_HIDDEN))
blk_unregister_region(disk_devt(disk), disk->minors); blk_unregister_region(disk_devt(disk), disk->minors);
kobject_put(disk->part0.holder_dir);
kobject_put(disk->slave_dir); kobject_put(disk->part0.holder_dir);
} kobject_put(disk->slave_dir);
part_stat_set_all(&disk->part0, 0); part_stat_set_all(&disk->part0, 0);
disk->part0.stamp = 0; disk->part0.stamp = 0;