Now that each hd_struct has a reference to the corresponding
block_device, there is no need for the bd_contains pointer. Add
a bdev_whole() helper to look up the whole device block_device
struture instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
* here to avoid changing device under exclusive owner.
*/
if (!(mode & FMODE_EXCL)) {
* here to avoid changing device under exclusive owner.
*/
if (!(mode & FMODE_EXCL)) {
- claimed_bdev = bdev->bd_contains;
+ claimed_bdev = bdev_whole(bdev);
error = bd_prepare_to_claim(bdev, claimed_bdev, loop_configure);
if (error)
goto out_putf;
error = bd_prepare_to_claim(bdev, claimed_bdev, loop_configure);
if (error)
goto out_putf;
*/
unsigned char *scsi_bios_ptable(struct block_device *dev)
{
*/
unsigned char *scsi_bios_ptable(struct block_device *dev)
{
- struct address_space *mapping = dev->bd_contains->bd_inode->i_mapping;
+ struct address_space *mapping = bdev_whole(dev)->bd_inode->i_mapping;
unsigned char *res = NULL;
struct page *page;
unsigned char *res = NULL;
struct page *page;
* under live filesystem.
*/
if (!(mode & FMODE_EXCL)) {
* under live filesystem.
*/
if (!(mode & FMODE_EXCL)) {
- claimed_bdev = bdev->bd_contains;
+ claimed_bdev = bdev_whole(bdev);
err = bd_prepare_to_claim(bdev, claimed_bdev,
truncate_bdev_range);
if (err)
err = bd_prepare_to_claim(bdev, claimed_bdev,
truncate_bdev_range);
if (err)
spin_lock_init(&bdev->bd_size_lock);
bdev->bd_disk = disk;
bdev->bd_partno = partno;
spin_lock_init(&bdev->bd_size_lock);
bdev->bd_disk = disk;
bdev->bd_partno = partno;
- bdev->bd_contains = NULL;
bdev->bd_super = NULL;
bdev->bd_inode = inode;
bdev->bd_part_count = 0;
bdev->bd_super = NULL;
bdev->bd_inode = inode;
bdev->bd_part_count = 0;
int ret;
if (!bdev->bd_openers) {
int ret;
if (!bdev->bd_openers) {
- bdev->bd_contains = bdev;
-
- if (!bdev->bd_partno) {
+ if (!bdev_is_partition(bdev)) {
ret = -ENXIO;
bdev->bd_part = disk_get_part(disk, 0);
if (!bdev->bd_part)
ret = -ENXIO;
bdev->bd_part = disk_get_part(disk, 0);
if (!bdev->bd_part)
whole->bd_part_count++;
mutex_unlock(&whole->bd_mutex);
whole->bd_part_count++;
mutex_unlock(&whole->bd_mutex);
- bdev->bd_contains = whole;
bdev->bd_part = disk_get_part(disk, bdev->bd_partno);
if (!(disk->flags & GENHD_FL_UP) ||
!bdev->bd_part || !bdev->bd_part->nr_sects) {
bdev->bd_part = disk_get_part(disk, bdev->bd_partno);
if (!(disk->flags & GENHD_FL_UP) ||
!bdev->bd_part || !bdev->bd_part->nr_sects) {
if (bdev->bd_bdi == &noop_backing_dev_info)
bdev->bd_bdi = bdi_get(disk->queue->backing_dev_info);
} else {
if (bdev->bd_bdi == &noop_backing_dev_info)
bdev->bd_bdi = bdi_get(disk->queue->backing_dev_info);
} else {
- if (bdev->bd_contains == bdev) {
+ if (!bdev_is_partition(bdev)) {
ret = 0;
if (bdev->bd_disk->fops->open)
ret = bdev->bd_disk->fops->open(bdev, mode);
ret = 0;
if (bdev->bd_disk->fops->open)
ret = bdev->bd_disk->fops->open(bdev, mode);
out_clear:
disk_put_part(bdev->bd_part);
bdev->bd_part = NULL;
out_clear:
disk_put_part(bdev->bd_part);
bdev->bd_part = NULL;
- bdev->bd_contains = NULL;
disk_put_part(bdev->bd_part);
bdev->bd_part = NULL;
if (bdev_is_partition(bdev))
disk_put_part(bdev->bd_part);
bdev->bd_part = NULL;
if (bdev_is_partition(bdev))
- victim = bdev->bd_contains;
- bdev->bd_contains = NULL;
+ victim = bdev_whole(bdev);
} else {
if (!bdev_is_partition(bdev) && disk->fops->release)
disk->fops->release(disk, mode);
} else {
if (!bdev_is_partition(bdev) && disk->fops->release)
disk->fops->release(disk, mode);
mutex_lock(&bdev->bd_mutex);
if (mode & FMODE_EXCL) {
mutex_lock(&bdev->bd_mutex);
if (mode & FMODE_EXCL) {
+ struct block_device *whole = bdev_whole(bdev);
spin_lock(&bdev_lock);
WARN_ON_ONCE(--bdev->bd_holders < 0);
spin_lock(&bdev_lock);
WARN_ON_ONCE(--bdev->bd_holders < 0);
- WARN_ON_ONCE(--bdev->bd_contains->bd_holders < 0);
+ WARN_ON_ONCE(--whole->bd_holders < 0);
- /* bd_contains might point to self, check in a separate step */
if ((bdev_free = !bdev->bd_holders))
bdev->bd_holder = NULL;
if ((bdev_free = !bdev->bd_holders))
bdev->bd_holder = NULL;
- if (!bdev->bd_contains->bd_holders)
- bdev->bd_contains->bd_holder = NULL;
+ if (!whole->bd_holders)
+ whole->bd_holder = NULL;
#ifdef CONFIG_SYSFS
struct list_head bd_holder_disks;
#endif
#ifdef CONFIG_SYSFS
struct list_head bd_holder_disks;
#endif
- struct block_device * bd_contains;
u8 bd_partno;
struct hd_struct * bd_part;
/* number of times partitions within this device have been opened. */
u8 bd_partno;
struct hd_struct * bd_part;
/* number of times partitions within this device have been opened. */
struct super_block *bd_fsfreeze_sb;
} __randomize_layout;
struct super_block *bd_fsfreeze_sb;
} __randomize_layout;
+#define bdev_whole(_bdev) \
+ ((_bdev)->bd_disk->part0.bdev)
+
#define bdev_kobj(_bdev) \
(&part_to_dev((_bdev)->bd_part)->kobj)
#define bdev_kobj(_bdev) \
(&part_to_dev((_bdev)->bd_part)->kobj)