linux-stable.git/include/linux/blk_types.h, branch v5.11.8

block: merge struct block_device and struct hd_struct

2020-12-01T21:53:40+00:00

Instead of having two structures that represent each block device with
different life time rules, merge them into a single one.  This also
greatly simplifies the reference counting rules, as we can use the inode
reference count as the main reference count for the new struct
block_device, with the device model reference front ending it for device
model interaction.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: allocate struct hd_struct as part of struct bdev_inode

2020-12-01T21:53:40+00:00

Allocate hd_struct together with struct block_device to pre-load
the lifetime rule changes in preparation of merging the two structures.

Note that part0 was previously embedded into struct gendisk, but is
a separate allocation now, and already points to the block_device instead
of the hd_struct.  The lifetime of struct gendisk is still controlled by
the struct device embedded in the part0 hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move the policy field to struct block_device

2020-12-01T21:53:40+00:00

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 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move make_it_fail to struct block_device

2020-12-01T21:53:40+00:00

Move the make_it_fail flag to struct block_device an turn it into a bool
in preparation of killing struct hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move holder_dir to struct block_device

2020-12-01T21:53:40+00:00

Move the holder_dir field to struct block_device in preparation for
kill struct hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move the partition_meta_info to struct block_device

2020-12-01T21:53:40+00:00

Move the partition_meta_info to struct block_device in preparation for
killing struct hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move the start_sect field to struct block_device

2020-12-01T21:53:40+00:00

Move the start_sect field to struct block_device in preparation
of killing struct hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: move disk stat accounting to struct block_device

2020-12-01T21:53:40+00:00

Move the dkstats and stamp field to struct block_device in preparation
of killing struct hd_struct.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Jens Axboe

block: remove ->bd_contains

2020-12-01T21:53:39+00:00

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 
Reviewed-by: Greg Kroah-Hartman 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Acked-by: Tejun Heo 
Signed-off-by: Jens Axboe

block: add a bdev_kobj helper

2020-12-01T21:53:39+00:00

Add a little helper to find the kobject for a struct block_device.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Greg Kroah-Hartman 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Reviewed-by: Johannes Thumshirn 
Acked-by: Tejun Heo 
Acked-by: Coly Li 		[bcache]
Acked-by: David Sterba 	[btrfs]
Signed-off-by: Jens Axboe