btrfs: zoned: always set max_active_zones for zoned devices

When a block device does not report a maximum number of open or active
zones,  currently assign BTRFS_DEFAULT_MAX_ACTIVE_ZONES (128) to
the internal limit, if the device has more than
BTRFS_DEFAULT_MAX_ACTIVE_ZONES zones.

But if the device has less than BTRFS_DEFAULT_MAX_ACTIVE_ZONES the
internal max_active_zones limit will stay at 0, even if the device has
zone resource limits. Furthermore, if the device has a total number of
zones that is less than BTRFS_DEFAULT_MAX_ACTIVE_ZONE, max_active_zones
should be set to at most the number of zones.

Also move the max_active_zone calculation and setting into a dedicated
helper, to shrink btrfs_get_dev_zone_info().

Fixes: 04147d8394e8 ("btrfs: zoned: limit active zones to max_open_zones")
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

0 files changed, 0 insertions, 0 deletions