From f55e017c642051ddc01d77a89ab18f5ee71d6276 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 1 Jun 2023 11:44:53 +0200 Subject: block: add a mark_dead holder operation Add a mark_dead method to blk_holder_ops that is called from blk_mark_disk_dead to notify the holder that the block device it is using has been marked dead. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: Christian Brauner Acked-by: Dave Chinner Reviewed-by: Dave Chinner Link: https://lore.kernel.org/r/20230601094459.1350643-11-hch@lst.de Signed-off-by: Jens Axboe --- block/genhd.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index b3bd58e9fbea..a07c4d6a1476 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -565,6 +565,28 @@ out_exit_elevator: } EXPORT_SYMBOL(device_add_disk); +static void blk_report_disk_dead(struct gendisk *disk) +{ + struct block_device *bdev; + unsigned long idx; + + rcu_read_lock(); + xa_for_each(&disk->part_tbl, idx, bdev) { + if (!kobject_get_unless_zero(&bdev->bd_device.kobj)) + continue; + rcu_read_unlock(); + + mutex_lock(&bdev->bd_holder_lock); + if (bdev->bd_holder_ops && bdev->bd_holder_ops->mark_dead) + bdev->bd_holder_ops->mark_dead(bdev); + mutex_unlock(&bdev->bd_holder_lock); + + put_device(&bdev->bd_device); + rcu_read_lock(); + } + rcu_read_unlock(); +} + /** * blk_mark_disk_dead - mark a disk as dead * @disk: disk to mark as dead @@ -592,6 +614,8 @@ void blk_mark_disk_dead(struct gendisk *disk) * Prevent new I/O from crossing bio_queue_enter(). */ blk_queue_start_drain(disk->queue); + + blk_report_disk_dead(disk); } EXPORT_SYMBOL_GPL(blk_mark_disk_dead); -- cgit v1.2.3