From: Jan Kara <jack@suse.cz>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
"Darrick J. Wong" <djwong@kernel.org>, Jan Kara <jack@suse.cz>,
linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-xfs@vger.kernel.org
Subject: Re: [PATCH 10/13] block: add a mark_dead holder operation
Date: Tue, 30 May 2023 15:05:23 +0200 [thread overview]
Message-ID: <20230530130523.5bl3cg3rfzia4vqm@quack3> (raw)
In-Reply-To: <20230518042323.663189-11-hch@lst.de>
On Thu 18-05-23 06:23:19, Christoph Hellwig wrote:
> 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 <hch@lst.de>
> Acked-by: Christian Brauner <brauner@kernel.org>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> block/genhd.c | 24 ++++++++++++++++++++++++
> include/linux/blkdev.h | 1 +
> 2 files changed, 25 insertions(+)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 226ddb8329f751..42aebf0e1e2628 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -565,6 +565,28 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
> }
> 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);
>
> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index c94f3b63c86422..41f894f6355f96 100644
> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -1466,6 +1466,7 @@ void blkdev_show(struct seq_file *seqf, off_t offset);
> #endif
>
> struct blk_holder_ops {
> + void (*mark_dead)(struct block_device *bdev);
> };
>
> struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
> --
> 2.39.2
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2023-05-30 13:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 4:23 introduce bdev holder ops and a file system shutdown method v2 Christoph Hellwig
2023-05-18 4:23 ` [PATCH 01/13] block: factor out a bd_end_claim helper from blkdev_put Christoph Hellwig
2023-05-18 4:23 ` [PATCH 02/13] block: refactor bd_may_claim Christoph Hellwig
2023-05-30 11:41 ` Jan Kara
2023-06-01 8:11 ` Christoph Hellwig
2023-06-01 9:58 ` Jan Kara
2023-05-18 4:23 ` [PATCH 03/13] block: turn bdev_lock into a mutex Christoph Hellwig
2023-05-18 4:23 ` [PATCH 04/13] block: consolidate the shutdown logic in blk_mark_disk_dead and del_gendisk Christoph Hellwig
2023-05-30 11:58 ` Jan Kara
2023-05-18 4:23 ` [PATCH 05/13] block: avoid repeated work in blk_mark_disk_dead Christoph Hellwig
2023-05-18 4:23 ` [PATCH 06/13] block: unhash the inode earlier in delete_partition Christoph Hellwig
2023-05-30 12:09 ` Jan Kara
2023-05-18 4:23 ` [PATCH 07/13] block: delete partitions later in del_gendisk Christoph Hellwig
2023-05-30 12:55 ` Jan Kara
2023-05-18 4:23 ` [PATCH 08/13] block: remove blk_drop_partitions Christoph Hellwig
2023-05-30 12:56 ` Jan Kara
2023-05-18 4:23 ` [PATCH 09/13] block: introduce holder ops Christoph Hellwig
2023-05-30 13:03 ` Jan Kara
2023-05-18 4:23 ` [PATCH 10/13] block: add a mark_dead holder operation Christoph Hellwig
2023-05-30 13:05 ` Jan Kara [this message]
2023-05-18 4:23 ` [PATCH 11/13] fs: add a method to shut down the file system Christoph Hellwig
2023-05-18 4:23 ` [PATCH 12/13] xfs: wire up sops->shutdown Christoph Hellwig
2023-05-18 5:03 ` Darrick J. Wong
2023-05-18 4:23 ` [PATCH 13/13] xfs: wire up the ->mark_dead holder operation for log and RT devices Christoph Hellwig
2023-05-18 5:40 ` Dave Chinner
2023-05-19 2:00 ` introduce bdev holder ops and a file system shutdown method v2 Theodore Ts'o
2023-05-19 4:11 ` Christoph Hellwig
2023-05-23 0:58 ` Darrick J. Wong
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