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block: move the policy field to struct block_device

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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>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-23 16:36:02 +01:00 committed by Jens Axboe
parent b309e99363
commit 83950d3590
6 changed files with 11 additions and 10 deletions
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2
block/blk-core.c
View File

@ -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))

8
block/genhd.c
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@ -1687,14 +1687,14 @@ 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);
}
@ -1704,7 +1704,7 @@ 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);

2
block/ioctl.c
View File

@ -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;
}

4
block/partitions/core.c
View File

@ -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;

1
include/linux/blk_types.h
View File

@ -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 */

4
include/linux/genhd.h
View File

@ -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);