[PATCH v2 09/13] t/zbd: get max_open_zones from sysfs

From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
To: fio@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	Vincent Fu <vincentfu@gmail.com>
Cc: Damien Le Moal <dlemoal@kernel.org>,
	Dmitry Fomichev <Dmitry.Fomichev@wdc.com>,
	Niklas Cassel <niklas.cassel@wdc.com>,
	Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Subject: [PATCH v2 09/13] t/zbd: get max_open_zones from sysfs
Date: Wed, 19 Jul 2023 19:57:52 +0900	[thread overview]
Message-ID: <20230719105756.553146-10-shinichiro.kawasaki@wdc.com> (raw)
In-Reply-To: <20230719105756.553146-1-shinichiro.kawasaki@wdc.com>

The helper bash function gets max_open_zones limit of the test target
device using sg_inq and libzbc tools. This works for SAS/SATA devices
but does not work for ZNS or null_blk devices. This results is running
the test case 31 with wrong max_open_zones value. Fix this by referring
max_open_zones sysfs attribute.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---
 t/zbd/functions | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/t/zbd/functions b/t/zbd/functions
index 529e7944..4faa45a9 100644
--- a/t/zbd/functions
+++ b/t/zbd/functions
@@ -212,8 +212,14 @@ last_online_zone() {
 # 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
-- 
2.40.1

