block: move policy from disk to part0
Move disk->policy to part0->policy. Implement and use get_disk_ro().
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/genhd.c b/block/genhd.c
index c70db35..70358f3 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -757,7 +757,7 @@
{
struct gendisk *disk = dev_to_disk(dev);
- return sprintf(buf, "%d\n", disk->policy ? 1 : 0);
+ return sprintf(buf, "%d\n", get_disk_ro(disk) ? 1 : 0);
}
static ssize_t disk_capability_show(struct device *dev,
@@ -1090,10 +1090,7 @@
void set_device_ro(struct block_device *bdev, int flag)
{
- if (bdev->bd_contains != bdev)
- bdev->bd_part->policy = flag;
- else
- bdev->bd_disk->policy = flag;
+ bdev->bd_part->policy = flag;
}
EXPORT_SYMBOL(set_device_ro);
@@ -1103,8 +1100,8 @@
struct disk_part_iter piter;
struct hd_struct *part;
- disk->policy = flag;
- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
+ disk_part_iter_init(&piter, disk,
+ DISK_PITER_INCL_EMPTY | DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
part->policy = flag;
disk_part_iter_exit(&piter);
@@ -1116,10 +1113,7 @@
{
if (!bdev)
return 0;
- else if (bdev->bd_contains != bdev)
- return bdev->bd_part->policy;
- else
- return bdev->bd_disk->policy;
+ return bdev->bd_part->policy;
}
EXPORT_SYMBOL(bdev_read_only);
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index f16bb46..03c2cb6 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1113,7 +1113,7 @@
if (write) {
/* disk has become write protected */
- if (cd->disk->policy) {
+ if (get_disk_ro(cd->disk)) {
cdrom_end_request(drive, 0);
return ide_stopped;
}
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index c3de311..5b91915 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -548,7 +548,7 @@
*/
param->open_count = dm_open_count(md);
- if (disk->policy)
+ if (get_disk_ro(disk))
param->flags |= DM_READONLY_FLAG;
param->event_nr = dm_get_event_nr(md);
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 24d2c56..ace6d03 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -375,7 +375,7 @@
p->start_sect = start;
p->nr_sects = len;
p->partno = partno;
- p->policy = disk->policy;
+ p->policy = get_disk_ro(disk);
dname = dev_name(ddev);
if (isdigit(dname[strlen(dname) - 1]))
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 9cb8380..4411bdd 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -145,7 +145,6 @@
struct kobject *slave_dir;
struct timer_rand_state *random;
- int policy;
atomic_t sync_io; /* RAID */
unsigned long stamp;
@@ -403,6 +402,11 @@
extern void set_device_ro(struct block_device *bdev, int flag);
extern void set_disk_ro(struct gendisk *disk, int flag);
+static inline int get_disk_ro(struct gendisk *disk)
+{
+ return disk->part0.policy;
+}
+
/* drivers/char/random.c */
extern void add_disk_randomness(struct gendisk *disk);
extern void rand_initialize_disk(struct gendisk *disk);