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block: add a disk_uevent helper

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Add a helper to call kobject_uevent for the disk and all partitions, and
unexport the disk_part_iter_* helpers that are now only used in the core
block code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-01-24 18:17:20 -07:00
committed by Jens Axboe
parent 0b6e522cdc
commit bc359d03c7
3 changed files with 21 additions and 34 deletions
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block/genhd.c
+14 -13
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@@ -203,7 +203,6 @@ void disk_part_iter_init(struct disk_part_iter *piter, struct gendisk *disk,
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(disk_part_iter_init);
/**
* disk_part_iter_next - proceed iterator to the next partition and return it
@@ -266,7 +265,6 @@ struct block_device *disk_part_iter_next(struct disk_part_iter *piter)
return piter->part;
}
EXPORT_SYMBOL_GPL(disk_part_iter_next);
/**
* disk_part_iter_exit - finish up partition iteration
@@ -283,7 +281,6 @@ void disk_part_iter_exit(struct disk_part_iter *piter)
bdput(piter->part);
piter->part = NULL;
}
EXPORT_SYMBOL_GPL(disk_part_iter_exit);
/**
* disk_has_partitions
@@ -555,6 +552,18 @@ static char *bdevt_str(dev_t devt, char *buf)
return buf;
}
void disk_uevent(struct gendisk *disk, enum kobject_action action)
{
struct disk_part_iter piter;
struct block_device *part;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
kobject_uevent(bdev_kobj(part), action);
disk_part_iter_exit(&piter);
}
EXPORT_SYMBOL_GPL(disk_uevent);
static void disk_scan_partitions(struct gendisk *disk)
{
struct block_device *bdev;
@@ -572,8 +581,6 @@ static void register_disk(struct device *parent, struct gendisk *disk,
const struct attribute_group **groups)
{
struct device *ddev = disk_to_dev(disk);
struct disk_part_iter piter;
struct block_device *part;
int err;
ddev->parent = parent;
@@ -616,15 +623,9 @@ static void register_disk(struct device *parent, struct gendisk *disk,
disk_scan_partitions(disk);
/* announce disk after possible partitions are created */
/* announce the disk and partitions after all partitions are created */
dev_set_uevent_suppress(ddev, 0);
kobject_uevent(&ddev->kobj, KOBJ_ADD);
/* announce possible partitions */
disk_part_iter_init(&piter, disk, 0);
while ((part = disk_part_iter_next(&piter)))
kobject_uevent(bdev_kobj(part), KOBJ_ADD);
disk_part_iter_exit(&piter);
disk_uevent(disk, KOBJ_ADD);
if (disk->queue->backing_dev_info->dev) {
err = sysfs_create_link(&ddev->kobj,