# max_open_zones in sysfs, or which lacks zoned block device support completely.
max_open_zones() {
local dev=$1
+ local realdev syspath
- if [ -n "${sg_inq}" ] && [ ! -n "${use_libzbc}" ]; then
+ realdev=$(readlink -f "$dev")
+ syspath=/sys/block/${realdev##*/}/queue/max_open_zones
+
+ if [ -b "${realdev}" ] && [ -r "${syspath}" ]; then
+ cat ${syspath}
+ elif [ -n "${sg_inq}" ] && [ ! -n "${use_libzbc}" ]; then
if ! ${sg_inq} -e --page=0xB6 --len=20 --hex "$dev" \
> /dev/null 2>&1; then
# When sg_inq can not get max open zones, specify 0 which indicates