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block: move holder_dir to struct block_device

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Move the holder_dir field to struct block_device in preparation for
kill struct hd_struct.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-23 19:00:13 +01:00 committed by Jens Axboe
parent 231926dbf0
commit 1bdd5ae025
5 changed files with 13 additions and 13 deletions
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5
block/genhd.c
View file

@ -681,7 +681,8 @@ static void register_disk(struct device *parent, struct gendisk *disk,
*/
pm_runtime_set_memalloc_noio(ddev, true);
disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
disk->part0.bdev->bd_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) {
@ -887,7 +888,7 @@ void del_gendisk(struct gendisk *disk)
blk_unregister_queue(disk);
kobject_put(disk->part0.holder_dir);
kobject_put(disk->part0.bdev->bd_holder_dir);
kobject_put(disk->slave_dir);
part_stat_set_all(&disk->part0, 0);

8
block/partitions/core.c
View file

@ -344,7 +344,7 @@ void delete_partition(struct hd_struct *part)
*/
get_device(disk_to_dev(disk));
rcu_assign_pointer(ptbl->part[part->partno], NULL);
kobject_put(part->holder_dir);
kobject_put(part->bdev->bd_holder_dir);
device_del(part_to_dev(part));
/*
@ -452,8 +452,8 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
goto out_put;
err = -ENOMEM;
p->holder_dir = kobject_create_and_add("holders", &pdev->kobj);
if (!p->holder_dir)
bdev->bd_holder_dir = kobject_create_and_add("holders", &pdev->kobj);
if (!bdev->bd_holder_dir)
goto out_del;
dev_set_uevent_suppress(pdev, 0);
@ -487,7 +487,7 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
out_remove_file:
device_remove_file(pdev, &dev_attr_whole_disk);
out_del:
kobject_put(p->holder_dir);
kobject_put(bdev->bd_holder_dir);
device_del(pdev);
out_put:
put_device(pdev);

11
fs/block_dev.c
View file

@ -1142,7 +1142,7 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk)
WARN_ON_ONCE(!bdev->bd_holder);
/* FIXME: remove the following once add_disk() handles errors */
if (WARN_ON(!disk->slave_dir || !bdev->bd_part->holder_dir))
if (WARN_ON(!disk->slave_dir || !bdev->bd_holder_dir))
goto out_unlock;
holder = bd_find_holder_disk(bdev, disk);
@ -1165,14 +1165,14 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk)
if (ret)
goto out_free;
ret = add_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj);
ret = add_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
if (ret)
goto out_del;
/*
* bdev could be deleted beneath us which would implicitly destroy
* the holder directory. Hold on to it.
*/
kobject_get(bdev->bd_part->holder_dir);
kobject_get(bdev->bd_holder_dir);
list_add(&holder->list, &bdev->bd_holder_disks);
goto out_unlock;
@ -1207,9 +1207,8 @@ void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk)
if (!WARN_ON_ONCE(holder == NULL) && !--holder->refcnt) {
del_symlink(disk->slave_dir, bdev_kobj(bdev));
del_symlink(bdev->bd_part->holder_dir,
&disk_to_dev(disk)->kobj);
kobject_put(bdev->bd_part->holder_dir);
del_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
kobject_put(bdev->bd_holder_dir);
list_del_init(&holder->list);
kfree(holder);
}

1
include/linux/blk_types.h
View file

@ -35,6 +35,7 @@ struct block_device {
#ifdef CONFIG_SYSFS
struct list_head bd_holder_disks;
#endif
struct kobject *bd_holder_dir;
u8 bd_partno;
struct hd_struct * bd_part;
/* number of times partitions within this device have been opened. */

1
include/linux/genhd.h
View file

@ -55,7 +55,6 @@ struct hd_struct {
struct block_device *bdev;
struct device __dev;
struct kobject *holder_dir;
int policy, partno;
#ifdef CONFIG_FAIL_MAKE_REQUEST
int make_it_fail;