Damien, > 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. Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> -- Martin K. Petersen Oracle Linux Engineering
