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Subject[PATCH 06/13] block: move policy from disk to part0
Date
Move disk->policy to part0->policy.  Implement and use get_disk_ro().

Signed-off-by: Tejun Heo <tj@kernel.org>
---
block/genhd.c | 16 +++++-----------
drivers/ide/ide-cd.c | 2 +-
drivers/md/dm-ioctl.c | 2 +-
fs/partitions/check.c | 2 +-
include/linux/genhd.h | 6 +++++-
5 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index b560d71..8762f35 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -758,7 +758,7 @@ static ssize_t disk_ro_show(struct device *dev,
{
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,
@@ -1091,10 +1091,7 @@ EXPORT_SYMBOL(put_disk);

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);
@@ -1104,8 +1101,8 @@ void set_disk_ro(struct gendisk *disk, int flag)
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);
@@ -1117,10 +1114,7 @@ int bdev_read_only(struct block_device *bdev)
{
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 49a8c58..62c3a79 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1113,7 +1113,7 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)

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 @@ static int __dev_status(struct mapped_device *md, struct dm_ioctl *param)
*/
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 9ab3e64..cb9ec77 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -375,7 +375,7 @@ int add_partition(struct gendisk *disk, int partno,
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 e89559a..461ba6d 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -155,7 +155,6 @@ struct gendisk {
struct kobject *slave_dir;

struct timer_rand_state *random;
- int policy;

atomic_t sync_io; /* RAID */
unsigned long stamp;
@@ -413,6 +412,11 @@ extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
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);
--
1.5.4.5


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