linux.git/fs/block_dev.c, branch v5.11-rc1

block: update some copyrights

2020-12-22T15:43:06+00:00

Update copyrights for files that have gotten some major rewrites lately.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Jens Axboe

block: remove a pointless self-reference in block_dev.c

2020-12-22T15:43:04+00:00

There is no point in duplicating the file name in the top of the file
comment.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Jens Axboe

block: stop using bdget_disk for partition 0

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

We can just dereference the point in struct gendisk instead.  Also
remove the now unused export.

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

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 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 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 the nr_sects field in struct hd_struct

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

Now that the hd_struct always has a block device attached to it, there is
no need for having two size field that just get out of sync.

Additionally the field in hd_struct did not use proper serialization,
possibly allowing for torn writes.  By only using the block_device field
this problem also gets fixed.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Greg Kroah-Hartman 
Reviewed-by: Jan Kara 
Reviewed-by: Hannes Reinecke 
Acked-by: Coly Li 			[bcache]
Acked-by: Chao Yu 			[f2fs]
Signed-off-by: Jens Axboe

block: initialize struct block_device in bdev_alloc

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

Don't play tricks with slab constructors as bdev structures tends to not
get reused very much, and this makes the code a lot less error prone.

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