If we zero out a region in a sequential write required zone, we cannot
write to the region until we reset the zone. Thus, we must prohibit zeroing
out to a sequential write required zone.
zero_dev_clamped() is modified to take the zone information and it calls
zero_zone_blocks() if the device is host managed to avoid writing to
sequential write required zones.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
All zones of zoned block devices should be reset before writing. Support
this by introducing PREP_DEVICE_ZONED.
btrfs_reset_all_zones() walk all the zones on a device, and reset a zone if
it is sequential required zone, or discard the zone range otherwise.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Introduce the queue_param helper function to get a device request queue
parameter. This helper will be used later to query information of a zoned
device.
Furthermore, rewrite is_ssd() using the helper function.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
[Naohiro] fixed error return value
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
David Sterba
Naohiro Aota