From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Date: Thu, 1 Oct 2020 10:15:29 +0000 (+0900)
Subject: common/rc: Add _test_dev_max_active_zones() helper function
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e6981bb2d9ceb06b2f310e149346d638ffd62681;p=users%2Fhch%2Fblktests.git

common/rc: Add _test_dev_max_active_zones() helper function

Linux kernel 5.9 introduced a new sysfs attribute "max_active_zones". It
is an attribute of zoned block devices which indicates the limit of zones
in open or close status. To refer the attribute from test cases,
introduce the helper function _test_dev_max_active_zones(). If the
attribute is available, the function returns the attribute value.
Otherwise, returns 0 to indicate that the device does not have the limit.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---

diff --git a/common/rc b/common/rc
index cdc0150..0589431 100644
--- a/common/rc
+++ b/common/rc
@@ -272,6 +272,14 @@ _test_dev_is_partition() {
 	[[ -n ${TEST_DEV_PART_SYSFS} ]]
 }
 
+_test_dev_max_active_zones() {
+	if [[ -r "${TEST_DEV_SYSFS}/queue/max_active_zones" ]]; then
+		_test_dev_queue_get max_active_zones
+	else
+		echo 0
+	fi
+}
+
 _require_test_dev_is_partition() {
 	if ! _test_dev_is_partition; then
 		SKIP_REASON="${TEST_DEV} is not a partition device"