block: rework zone reporting

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Avoid the need to allocate a potentially large array of struct blk_zone
in the block layer by switching the ->report_zones method interface to
a callback model. Now the caller simply supplies a callback that is
executed on each reported zone, and private data for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2019-11-11 11:39:30 +09:00 • committed by Jens Axboe

parent 23a50861ad

commit d41003513e

12 changed files with 329 additions and 447 deletions

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15

include/linux/blkdev.h

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24

include/linux/device-mapper.h

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