1. 01 Dec, 2016 1 commit
    • Damien Le Moal's avatar
      block: Check partition alignment on zoned block devices · b02d8aae
      Damien Le Moal authored
      Both blkdev_report_zones and blkdev_reset_zones can operate on a partition of
      a zoned block device. However, the first and last zones reported for a
      partition make sense only if the partition start sector and size are aligned
      on the device zone size. The same applies for zone reset. Resetting the first
      or the last zone of a partition straddling zones may impact neighboring
      partitions. Finally, if a partition start sector is not at the beginning of a
      sequential zone, it will be impossible to write to the first sectors of the
      partition on a host-managed device.
      Avoid all these problems and incoherencies by ignoring partitions that are not
      zone aligned.
      
      Note: Even with CONFIG_BLK_DEV_ZONED disabled, bdev_is_zoned() will report the
      correct disk zoning type (host-aware, host-managed or none) but
      bdev_zone_size() will always return 0 for zoned block devices (i.e. the zone
      size is unknown). So test this as a way to ensure that a zoned block device is
      being handled as such. As a result, for a host-aware devices, unaligned zone
      partitions will be accepted with CONFIG_BLK_DEV_ZONED disabled. That is, the
      disk will be treated as a regular block device (as it should). If zoned block
      device support is enabled, only aligned partitions will be accepted.
      Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
      Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      b02d8aae
  2. 29 Nov, 2016 24 commits
  3. 28 Nov, 2016 3 commits
  4. 23 Nov, 2016 1 commit
  5. 22 Nov, 2016 11 commits