From: Jan Kara <jack@suse.cz>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>,
Josef Bacik <josef@toxicpanda.com>, Coly Li <colyli@suse.de>,
Mike Snitzer <snitzer@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jan Kara <jack@suse.cz>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>,
dm-devel@redhat.com, Jan Kara <jack@suse.com>,
linux-block@vger.kernel.org, linux-bcache@vger.kernel.org,
linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 35/44] block: move the policy field to struct block_device
Date: Thu, 26 Nov 2020 18:03:15 +0100 [thread overview]
Message-ID: <20201126170315.GU422@quack2.suse.cz> (raw)
In-Reply-To: <20201126130422.92945-36-hch@lst.de>
On Thu 26-11-20 14:04:13, Christoph Hellwig wrote:
> Move the policy field to struct block_device and rename it to the
> more descriptive bd_read_only. Also turn the field into a bool as it
> is used as such.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> block/blk-core.c | 2 +-
> block/genhd.c | 8 ++++----
> block/ioctl.c | 2 +-
> block/partitions/core.c | 4 ++--
> include/linux/blk_types.h | 1 +
> include/linux/genhd.h | 4 ++--
> 6 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/block/blk-core.c b/block/blk-core.c
> index 9121390be97a76..d64ffcb6f9ae5d 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -696,7 +696,7 @@ static inline bool bio_check_ro(struct bio *bio, struct hd_struct *part)
> {
> const int op = bio_op(bio);
>
> - if (part->policy && op_is_write(op)) {
> + if (part->bdev->bd_read_only && op_is_write(op)) {
> char b[BDEVNAME_SIZE];
>
> if (op_is_flush(bio->bi_opf) && !bio_sectors(bio))
> diff --git a/block/genhd.c b/block/genhd.c
> index 0371558ccde14c..ae312ccc6dd7c0 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -1679,14 +1679,14 @@ void set_disk_ro(struct gendisk *disk, int flag)
> struct disk_part_iter piter;
> struct hd_struct *part;
>
> - if (disk->part0.policy != flag) {
> + if (disk->part0.bdev->bd_read_only != flag) {
> set_disk_ro_uevent(disk, flag);
> - disk->part0.policy = flag;
> + disk->part0.bdev->bd_read_only = flag;
> }
>
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
> while ((part = disk_part_iter_next(&piter)))
> - part->policy = flag;
> + part->bdev->bd_read_only = flag;
> disk_part_iter_exit(&piter);
> }
>
> @@ -1696,7 +1696,7 @@ int bdev_read_only(struct block_device *bdev)
> {
> if (!bdev)
> return 0;
> - return bdev->bd_part->policy;
> + return bdev->bd_read_only;
> }
>
> EXPORT_SYMBOL(bdev_read_only);
> diff --git a/block/ioctl.c b/block/ioctl.c
> index a6d8171221c7dc..d61d652078f41c 100644
> --- a/block/ioctl.c
> +++ b/block/ioctl.c
> @@ -345,7 +345,7 @@ static int blkdev_roset(struct block_device *bdev, fmode_t mode,
> if (ret)
> return ret;
> }
> - bdev->bd_part->policy = n;
> + bdev->bd_read_only = n;
> return 0;
> }
>
> diff --git a/block/partitions/core.c b/block/partitions/core.c
> index d1093adf2570e2..f397ec9922bd6e 100644
> --- a/block/partitions/core.c
> +++ b/block/partitions/core.c
> @@ -199,7 +199,7 @@ static ssize_t part_ro_show(struct device *dev,
> struct device_attribute *attr, char *buf)
> {
> struct hd_struct *p = dev_to_part(dev);
> - return sprintf(buf, "%d\n", p->policy ? 1 : 0);
> + return sprintf(buf, "%d\n", p->bdev->bd_read_only);
> }
>
> static ssize_t part_alignment_offset_show(struct device *dev,
> @@ -420,7 +420,7 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
> bdev->bd_start_sect = start;
> bdev_set_nr_sectors(bdev, len);
> p->partno = partno;
> - p->policy = get_disk_ro(disk);
> + bdev->bd_read_only = get_disk_ro(disk);
>
> if (info) {
> err = -ENOMEM;
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index b237f1e4081405..758cf71c9aa2a6 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -23,6 +23,7 @@ struct block_device {
> sector_t bd_start_sect;
> struct disk_stats __percpu *bd_stats;
> unsigned long bd_stamp;
> + bool bd_read_only; /* read-only policy */
> dev_t bd_dev;
> int bd_openers;
> struct inode * bd_inode; /* will die */
> diff --git a/include/linux/genhd.h b/include/linux/genhd.h
> index 349cf6403ccddc..dcbf9ef7610ea6 100644
> --- a/include/linux/genhd.h
> +++ b/include/linux/genhd.h
> @@ -55,7 +55,7 @@ struct hd_struct {
>
> struct block_device *bdev;
> struct device __dev;
> - int policy, partno;
> + int partno;
> struct rcu_work rcu_work;
> };
>
> @@ -278,7 +278,7 @@ extern void set_disk_ro(struct gendisk *disk, int flag);
>
> static inline int get_disk_ro(struct gendisk *disk)
> {
> - return disk->part0.policy;
> + return disk->part0.bdev->bd_read_only;
> }
>
> extern void disk_block_events(struct gendisk *disk);
> --
> 2.29.2
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2020-11-26 17:03 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-26 13:03 merge struct block_device and struct hd_struct v3 Christoph Hellwig
2020-11-26 13:03 ` [PATCH 01/44] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats Christoph Hellwig
2020-11-26 13:03 ` [PATCH 02/44] filemap: consistently use ->f_mapping over ->i_mapping Christoph Hellwig
2020-11-26 13:03 ` [PATCH 03/44] fs: remove get_super_thawed and get_super_exclusive_thawed Christoph Hellwig
2020-11-26 13:03 ` [PATCH 04/44] fs: simplify freeze_bdev/thaw_bdev Christoph Hellwig
2020-11-26 14:13 ` Jan Kara
2020-11-26 13:03 ` [PATCH 05/44] mtip32xx: remove the call to fsync_bdev on removal Christoph Hellwig
2020-11-26 13:03 ` [PATCH 06/44] zram: do not call set_blocksize Christoph Hellwig
2020-11-26 13:03 ` [PATCH 07/44] loop: " Christoph Hellwig
2020-11-26 13:03 ` [PATCH 08/44] dm: simplify flush_bio initialization in __send_empty_flush Christoph Hellwig
2020-11-26 13:03 ` [PATCH 09/44] dm: remove the block_device reference in struct mapped_device Christoph Hellwig
2020-11-27 10:36 ` Hannes Reinecke
2020-11-26 13:03 ` [PATCH 10/44] block: remove a duplicate __disk_get_part prototype Christoph Hellwig
2020-11-27 10:36 ` Hannes Reinecke
2020-11-26 13:03 ` [PATCH 11/44] block: remove a superflous check in blkpg_do_ioctl Christoph Hellwig
2020-11-27 10:37 ` Hannes Reinecke
2020-11-26 13:03 ` [PATCH 12/44] block: add a bdev_kobj helper Christoph Hellwig
2020-11-26 14:47 ` David Sterba
2020-11-27 12:03 ` Hannes Reinecke
2020-11-26 13:03 ` [PATCH 13/44] block: use disk_part_iter_exit in disk_part_iter_next Christoph Hellwig
2020-11-27 12:04 ` Hannes Reinecke
2020-11-26 13:03 ` [PATCH 14/44] block: use put_device in put_disk Christoph Hellwig
2020-11-26 13:03 ` [PATCH 15/44] block: change the hash used for looking up block devices Christoph Hellwig
2020-11-26 13:03 ` [PATCH 16/44] init: refactor name_to_dev_t Christoph Hellwig
2020-11-26 13:03 ` [PATCH 17/44] init: refactor devt_from_partuuid Christoph Hellwig
2020-11-26 13:03 ` [PATCH 18/44] init: cleanup match_dev_by_uuid and match_dev_by_label Christoph Hellwig
2020-11-26 13:03 ` [PATCH 19/44] block: refactor __blkdev_put Christoph Hellwig
2020-11-26 13:03 ` [PATCH 20/44] block: refactor blkdev_get Christoph Hellwig
2020-11-26 14:55 ` Jan Kara
2020-11-26 13:03 ` [PATCH 21/44] block: move bdput() to the callers of __blkdev_get Christoph Hellwig
2020-11-26 15:05 ` Jan Kara
2020-11-26 13:04 ` [PATCH 22/44] block: opencode devcgroup_inode_permission Christoph Hellwig
2020-11-26 15:07 ` Jan Kara
2020-11-26 13:04 ` [PATCH 23/44] block: remove i_bdev Christoph Hellwig
2020-11-26 15:45 ` Jan Kara
2020-11-26 13:04 ` [PATCH 24/44] block: simplify bdev/disk lookup in blkdev_get Christoph Hellwig
2020-11-26 16:33 ` Jan Kara
2020-11-26 17:42 ` Christoph Hellwig
2020-11-26 13:04 ` [PATCH 25/44] block: remove ->bd_contains Christoph Hellwig
2020-11-26 13:04 ` [PATCH 26/44] block: simplify the block device claiming interface Christoph Hellwig
2020-11-26 13:04 ` [PATCH 27/44] block: simplify part_to_disk Christoph Hellwig
2020-11-26 16:36 ` Jan Kara
2020-11-26 13:04 ` [PATCH 28/44] block: initialize struct block_device in bdev_alloc Christoph Hellwig
2020-11-26 16:37 ` Jan Kara
2020-11-26 13:04 ` [PATCH 29/44] block: remove the nr_sects field in struct hd_struct Christoph Hellwig
2020-11-26 16:50 ` Jan Kara
2020-11-26 17:52 ` Christoph Hellwig
2020-11-26 18:04 ` Jan Kara
2020-11-27 9:41 ` Christoph Hellwig
2020-11-26 13:04 ` [PATCH 30/44] block: move disk stat accounting to struct block_device Christoph Hellwig
2020-11-26 16:53 ` Jan Kara
2020-11-26 13:04 ` [PATCH 31/44] block: move the start_sect field " Christoph Hellwig
2020-11-26 16:56 ` Jan Kara
2020-11-26 18:02 ` Christoph Hellwig
2020-11-26 13:04 ` [PATCH 32/44] block: move the partition_meta_info " Christoph Hellwig
2020-11-26 16:58 ` Jan Kara
2020-11-26 13:04 ` [PATCH 33/44] block: move holder_dir " Christoph Hellwig
2020-11-26 17:00 ` Jan Kara
2020-11-26 13:04 ` [PATCH 34/44] block: move make_it_fail " Christoph Hellwig
2020-11-26 17:01 ` Jan Kara
2020-11-26 13:04 ` [PATCH 35/44] block: move the policy field " Christoph Hellwig
2020-11-26 17:03 ` Jan Kara [this message]
2020-11-26 13:04 ` [PATCH 36/44] block: allocate struct hd_struct as part of struct bdev_inode Christoph Hellwig
2020-11-26 17:35 ` Jan Kara
2020-11-26 18:00 ` Jan Kara
2020-11-26 18:02 ` Christoph Hellwig
2020-11-26 13:04 ` [PATCH 37/44] block: switch partition lookup to use struct block_device Christoph Hellwig
2020-11-26 17:45 ` Jan Kara
2020-11-26 18:22 ` Jan Kara
2020-11-27 9:48 ` Christoph Hellwig
2020-11-27 12:45 ` Jan Kara
2020-11-27 15:36 ` Christoph Hellwig
2020-11-27 17:26 ` Jan Kara
2020-11-26 13:04 ` [PATCH 38/44] block: remove the partno field from struct hd_struct Christoph Hellwig
2020-11-26 17:46 ` Jan Kara
2020-11-26 13:04 ` [PATCH 39/44] block: pass a block_device to blk_alloc_devt Christoph Hellwig
2020-11-26 17:47 ` Jan Kara
2020-11-26 13:04 ` [PATCH 40/44] block: pass a block_device to invalidate_partition Christoph Hellwig
2020-11-26 17:49 ` Jan Kara
2020-11-26 13:04 ` [PATCH 41/44] block: switch disk_part_iter_* to use a struct block_device Christoph Hellwig
2020-11-27 12:53 ` Jan Kara
2020-11-27 15:24 ` Christoph Hellwig
2020-11-27 17:30 ` Jan Kara
2020-11-26 13:04 ` [PATCH 42/44] f2fs: remove a few bd_part checks Christoph Hellwig
2020-11-26 13:04 ` [PATCH 43/44] block: merge struct block_device and struct hd_struct Christoph Hellwig
2020-11-27 13:19 ` Jan Kara
2020-11-27 15:47 ` Christoph Hellwig
2020-11-26 13:04 ` [PATCH 44/44] block: stop using bdget_disk for partition 0 Christoph Hellwig
2020-11-27 13:22 ` Jan Kara
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