[PATCH v3] ndctl, test: add a new unit test for max_available_extent namespace

[Masayoshi Mizuma <msys.mizuma@gmail.com>]

From: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>

Add a new unit test to test max_available_extent namespace.
This feature is implemented by the following patches.

  kernel side:
    https://lists.01.org/pipermail/linux-nvdimm/2018-July/016731.html
    https://lists.01.org/pipermail/linux-nvdimm/2018-July/016732.html

  ndctl side:
    https://lists.01.org/pipermail/linux-nvdimm/2018-July/017176.html

Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
---
 test/Makefile.am                |  3 ++-
 test/max_available_extent_ns.sh | 46 +++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100755 test/max_available_extent_ns.sh

diff --git a/test/Makefile.am b/test/Makefile.am
index 8c55056..9af2464 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -22,7 +22,8 @@ TESTS =\
 	firmware-update.sh \
 	ack-shutdown-count-set \
 	rescan-partitions.sh \
-	monitor.sh
+	monitor.sh \
+	max_available_extent_ns.sh
 
 check_PROGRAMS =\
 	libndctl \
diff --git a/test/max_available_extent_ns.sh b/test/max_available_extent_ns.sh
new file mode 100755
index 0000000..1c7e7bf
--- /dev/null
+++ b/test/max_available_extent_ns.sh
@@ -0,0 +1,46 @@
+#!/bin/bash -Ex
+
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2018, FUJITSU LIMITED. All rights reserved.
+
+rc=77
+
+. ./common
+
+trap 'err $LINENO' ERR
+
+check_min_kver "4.19" || do_skip "kernel $KVER may not support max_available_size"
+
+init()
+{
+	$NDCTL disable-region -b $NFIT_TEST_BUS0 all
+	$NDCTL zero-labels -b $NFIT_TEST_BUS0 all
+	$NDCTL enable-region -b $NFIT_TEST_BUS0 all
+}
+
+do_test()
+{
+	region=$($NDCTL list -b $NFIT_TEST_BUS0 -R -t pmem | jq -r 'sort_by(-.size) | .[].dev' | head -1)
+
+	available_sz=$($NDCTL list -r $region | jq -r .[].available_size)
+	size=$(( available_sz/4 ))
+
+	NS=()
+	for ((i=0; i<3; i++))
+	do
+		NS[$i]=$($NDCTL create-namespace -r $region -t pmem -s $size | jq -r .dev)
+		[[ -n ${NS[$i]} ]]
+	done
+
+	$NDCTL disable-namespace ${NS[1]}
+	$NDCTL destroy-namespace ${NS[1]}
+
+	$NDCTL create-namespace -r $region -t pmem
+}
+
+modprobe nfit_test
+rc=1
+init
+do_test
+_cleanup
+exit 0
-- 
2.18.0

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