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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>, Song Liu <song@kernel.org>
Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	"Minchan Kim" <minchan@kernel.org>,
	"Nitin Gupta" <ngupta@vflare.org>,
	"Stefan Haberland" <sth@linux.ibm.com>,
	"Jan Hoeppner" <hoeppner@linux.ibm.com>,
	linux-block@vger.kernel.org, linux-raid@vger.kernel.org,
	linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: [PATCH 13/15] block: move bd_part_count to struct gendisk
Date: Tue, 30 Mar 2021 18:17:25 +0200	[thread overview]
Message-ID: <20210330161727.2297292-14-hch@lst.de> (raw)
In-Reply-To: <20210330161727.2297292-1-hch@lst.de>

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>
---
 block/partitions/core.c   | 2 +-
 fs/block_dev.c            | 4 ++--
 include/linux/blk_types.h | 3 ---
 include/linux/genhd.h     | 1 +
 4 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index 60388a41ff92a3..162b9b35c53171 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -527,7 +527,7 @@ int blk_drop_partitions(struct block_device *bdev)
 	struct disk_part_iter piter;
 	struct block_device *part;
 
-	if (bdev->bd_part_count)
+	if (bdev->bd_disk->open_partitions)
 		return -EBUSY;
 
 	sync_blockdev(bdev);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index ade5a180ff62d3..6d7e3bd7cb7ce3 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1339,7 +1339,7 @@ static int blkdev_get_part(struct block_device *part, fmode_t mode)
 	if (!(disk->flags & GENHD_FL_UP) || !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);
@@ -1361,7 +1361,7 @@ 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);
 }
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index a09660671fa47e..fd3860d18d7ed7 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -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;
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 02ea04144ece7b..146d2dafdccd58 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -155,6 +155,7 @@ struct gendisk {
 #define GD_READ_ONLY			1
 
 	struct mutex open_mutex;	/* open/close mutex */
+	unsigned open_partitions;	/* number of open partitions */
 
 	struct kobject *slave_dir;
 
-- 
2.30.1


  parent reply	other threads:[~2021-03-30 16:19 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-30 16:17 move bd_mutex to the gendisk Christoph Hellwig
2021-03-30 16:17 ` [PATCH 01/15] md: remove the code to flush an old instance in md_open Christoph Hellwig
2021-03-31  3:29   ` heming.zhao
2021-03-31  6:53     ` Christoph Hellwig
2021-03-30 16:17 ` [PATCH 02/15] md: factor out a mddev_find_locked helper from mddev_find Christoph Hellwig
2021-03-30 16:17 ` [PATCH 03/15] md: factor out a mddev_alloc_unit " Christoph Hellwig
2021-03-30 16:17 ` [PATCH 04/15] md: split mddev_find Christoph Hellwig
2021-03-30 16:17 ` [PATCH 05/15] md: refactor mddev_find_or_alloc Christoph Hellwig
2021-03-30 16:17 ` [PATCH 06/15] md: do not return existing mddevs from mddev_find_or_alloc Christoph Hellwig
2021-03-30 16:17 ` [PATCH 07/15] block: remove the -ERESTARTSYS handling in blkdev_get_by_dev Christoph Hellwig
2021-03-30 16:17 ` [PATCH 08/15] block: split __blkdev_get Christoph Hellwig
2021-03-30 16:17 ` [PATCH 09/15] block: move sync_blockdev from __blkdev_put to blkdev_put Christoph Hellwig
2021-03-30 16:17 ` [PATCH 10/15] block: move bd_mutex to struct gendisk Christoph Hellwig
2021-04-01  8:25   ` Roger Pau Monné
2021-04-08 14:29   ` Stefan Haberland
2021-03-30 16:17 ` [PATCH 11/15] block: move adjusting bd_part_count out of __blkdev_get Christoph Hellwig
2021-03-30 16:17 ` [PATCH 12/15] block: split __blkdev_put Christoph Hellwig
2021-03-30 16:17 ` Christoph Hellwig [this message]
2021-03-30 16:17 ` [PATCH 14/15] block: factor out a part_devt helper Christoph Hellwig
2021-03-30 16:17 ` [PATCH 15/15] block: remove bdget_disk Christoph Hellwig
2021-03-30 23:37   ` Chaitanya Kulkarni

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