From 66fddc25fe182fd7d28b35f4173113f3eefc7fb5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 1 Jun 2023 11:44:47 +0200 Subject: block: consolidate the shutdown logic in blk_mark_disk_dead and del_gendisk blk_mark_disk_dead does very similar work a a section of del_gendisk: - set the GD_DEAD flag - set the capacity to zero - start a queue drain but del_gendisk also sets QUEUE_FLAG_DYING on the queue if it is owned by the disk, sets the capacity to zero before starting the drain, and both with sending a uevent and kernel message for this fake capacity change. Move the exact logic from the more heavily used del_gendisk into blk_mark_disk_dead and then call blk_mark_disk_dead from del_gendisk. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: Dave Chinner Reviewed-by: Dave Chinner Link: https://lore.kernel.org/r/20230601094459.1350643-5-hch@lst.de Signed-off-by: Jens Axboe --- block/genhd.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index 3537b7d7c484..aa327314905e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -572,13 +572,22 @@ EXPORT_SYMBOL(device_add_disk); */ void blk_mark_disk_dead(struct gendisk *disk) { + /* + * Fail any new I/O. + */ set_bit(GD_DEAD, &disk->state); - blk_queue_start_drain(disk->queue); + if (test_bit(GD_OWNS_QUEUE, &disk->state)) + blk_queue_flag_set(QUEUE_FLAG_DYING, disk->queue); /* * Stop buffered writers from dirtying pages that can't be written out. */ - set_capacity_and_notify(disk, 0); + set_capacity(disk, 0); + + /* + * Prevent new I/O from crossing bio_queue_enter(). + */ + blk_queue_start_drain(disk->queue); } EXPORT_SYMBOL_GPL(blk_mark_disk_dead); @@ -620,18 +629,7 @@ void del_gendisk(struct gendisk *disk) fsync_bdev(disk->part0); __invalidate_device(disk->part0, true); - /* - * Fail any new I/O. - */ - set_bit(GD_DEAD, &disk->state); - if (test_bit(GD_OWNS_QUEUE, &disk->state)) - blk_queue_flag_set(QUEUE_FLAG_DYING, q); - set_capacity(disk, 0); - - /* - * Prevent new I/O from crossing bio_queue_enter(). - */ - blk_queue_start_drain(q); + blk_mark_disk_dead(disk); if (!(disk->flags & GENHD_FL_HIDDEN)) { sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi"); -- cgit