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@xxxxxx>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
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@xxxxxxxx>
SUSE Labs, CR
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