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block: move bd_part_count to struct gendisk

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The bd_part_count value only makes sense for whole devices, so move it
to struct gendisk and give it a more descriptive name.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210525061301.2242282-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-05-25 08:12:59 +02:00 committed by Jens Axboe
parent c8276b954d
commit ab4b57057d
4 changed files with 5 additions and 7 deletions
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2
block/ioctl.c
View File

@ -89,7 +89,7 @@ static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (bdev->bd_part_count)
if (bdev->bd_disk->open_partitions)
return -EBUSY;
/*

6
fs/block_dev.c
View File

@ -1253,7 +1253,7 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate)
return -ENXIO;
rescan:
if (bdev->bd_part_count)
if (disk->open_partitions)
return -EBUSY;
sync_blockdev(bdev);
invalidate_bdev(bdev);
@ -1348,7 +1348,7 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode)
if (!bdev_nr_sectors(part))
goto out_blkdev_put;
whole->bd_part_count++;
disk->open_partitions++;
set_init_blocksize(part);
if (part->bd_bdi == &noop_backing_dev_info)
part->bd_bdi = bdi_get(disk->queue->backing_dev_info);
@ -1370,7 +1370,7 @@ static void blkdev_put_part(struct block_device *part, fmode_t mode)
if (--part->bd_openers)
return;
blkdev_flush_mapping(part);
whole->bd_part_count--;
whole->bd_disk->open_partitions--;
blkdev_put_whole(whole, mode);
bdput(whole);
}

3
include/linux/blk_types.h
View File

@ -39,9 +39,6 @@ struct block_device {
#endif
struct kobject *bd_holder_dir;
u8 bd_partno;
/* number of times partitions within this device have been opened. */
unsigned bd_part_count;
spinlock_t bd_size_lock; /* for bd_inode->i_size updates */
struct gendisk * bd_disk;
struct backing_dev_info *bd_bdi;

1
include/linux/genhd.h
View File

@ -156,6 +156,7 @@ struct gendisk {
#define GD_QUEUE_REF 2
struct mutex open_mutex; /* open/close mutex */
unsigned open_partitions; /* number of open partitions */
struct kobject *slave_dir;