On 10/12/18 4:30 AM, Damien Le Moal wrote:
From: Christoph Hellwig <hch@xxxxxx> Dispatching a report zones command through the request queue is a major pain due to the command reply payload rewriting necessary. Given that blkdev_report_zones() is executing everything synchronously, implement report zones as a block device file operation instead, allowing major simplification of the code in many places. sd, null-blk, dm-linear and dm-flakey being the only block device drivers supporting exposing zoned block devices, these drivers are modified to provide the device side implementation of the report_zones() block device file operation. For device mappers, a new report_zones() target type operation is defined so that the upper block layer calls blkdev_report_zones() can be propagated down to the underlying devices of the dm targets. Implementation for this new operation is added to the dm-linear and dm-flakey targets. Signed-off-by: Christoph Hellwig <hch@xxxxxx> [Damien] * Changed method block_device argument to gendisk * Various bug fixes and improvements * Added support for null_blk, dm-linear and dm-flakey. Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> --- block/blk-core.c | 1 - block/blk-mq-debugfs.c | 1 - block/blk-zoned.c | 164 ++++++++++---------------------- drivers/block/null_blk.h | 11 ++- drivers/block/null_blk_main.c | 23 +---- drivers/block/null_blk_zoned.c | 57 +++-------- drivers/md/dm-flakey.c | 30 ++++-- drivers/md/dm-linear.c | 35 ++++--- drivers/md/dm.c | 169 ++++++++++++++++----------------- drivers/scsi/sd.c | 13 +-- drivers/scsi/sd.h | 11 +-- drivers/scsi/sd_zbc.c | 153 +++++++++-------------------- include/linux/blk_types.h | 2 - include/linux/blkdev.h | 8 +- include/linux/device-mapper.h | 12 ++- include/trace/events/f2fs.h | 1 - 16 files changed, 266 insertions(+), 425 deletions(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
