Commit 0ec4d913 authored by Damien Le Moal's avatar Damien Le Moal Committed by Jens Axboe
Browse files

null_blk: discard zones on reset 



When memory backing is enabled, use null_handle_discard() to free the
backing memory used by a zone when the zone is being reset.

Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 49c7089f

drivers/block/null_blk.h

+2 −0
Original line number Diff line number Diff line
@@ -116,6 +116,8 @@ struct nullb { 
	char disk_name[DISK_NAME_LEN];

};



blk_status_t null_handle_discard(struct nullb_device *dev, sector_t sector,

				 sector_t nr_sectors);

blk_status_t null_process_cmd(struct nullb_cmd *cmd,

			      enum req_opf op, sector_t sector,

			      unsigned int nr_sectors);

drivers/block/null_blk_main.c

+2 −2
Original line number Diff line number Diff line
@@ -1076,7 +1076,7 @@ static void nullb_fill_pattern(struct nullb *nullb, struct page *page, 
	kunmap_atomic(dst);

}



static blk_status_t null_handle_discard(struct nullb_device *dev,

blk_status_t null_handle_discard(struct nullb_device *dev,

				 sector_t sector, sector_t nr_sectors)

{

	struct nullb *nullb = dev->nullb;

drivers/block/null_blk_zoned.c

+3 −0
Original line number Diff line number Diff line
@@ -588,6 +588,9 @@ static blk_status_t null_reset_zone(struct nullb_device *dev, 


	null_unlock_zone_res(dev);



	if (dev->memory_backed)

		return null_handle_discard(dev, zone->start, zone->len);



	return BLK_STS_OK;

}

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