• Damien Le Moal's avatar
    block: Remove partition support for zoned block devices · 5eac3eb3
    Damien Le Moal authored
    
    
    No known partitioning tool supports zoned block devices, especially the
    host managed flavor with strong sequential write constraints.
    Furthermore, there are also no known user nor use cases for partitioned
    zoned block devices.
    
    This patch removes partition device creation for zoned block devices,
    which allows simplifying the processing of zone commands for zoned
    block devices. A warning is added if a partition table is found on the
    device.
    
    For report zones operations no zone sector information remapping is
    necessary anymore, simplifying the code. Of note is that remapping of
    zone reports for DM targets is still necessary as done by
    dm_remap_zone_report().
    
    Similarly, remaping of a zone reset bio is not necessary anymore.
    Testing for the applicability of the zone reset all request also becomes
    simpler and only needs to check that the number of sectors of the
    requested zone range is equal to the disk capacity.
    Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    5eac3eb3
blk-zoned.c 13.3 KB