btrfs-progs: tests: add test case for zoned block group tree feature

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

tests/mkfs-tests/031-zoned-bgt/test.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Verify mkfs for zoned devices support block-group-tree feature
+
+source "$TEST_TOP/common" || exit
+
+setup_root_helper
+prepare_test_dev
+
+nullb="$TEST_TOP/nullb"
+# Create one 128M device with 4M zones, 32 of them
+size=128
+zone=4
+
+run_mayfail $SUDO_HELPER "$nullb" setup
+if [ $? != 0 ]; then
+	_not_run "cannot setup nullb environment for zoned devices"
+fi
+
+# Record any other pre-existing devices in case creation fails
+run_check $SUDO_HELPER "$nullb" ls
+
+# Last line has the name of the device node path
+out=$(run_check_stdout $SUDO_HELPER "$nullb" create -s "$size" -z "$zone")
+if [ $? != 0 ]; then
+	_fail "cannot create nullb zoned device $i"
+fi
+dev=$(echo "$out" | tail -n 1)
+name=$(basename "${dev}")
+
+run_check $SUDO_HELPER "$nullb" ls
+
+TEST_DEV="${dev}"
+# Use single as it's supported on more kernels
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -m single -d single -O block-group-tree "${dev}"
+run_check_mount_test_dev
+run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT"/file bs=1M count=1
+run_check $SUDO_HELPER "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+run_check_umount_test_dev
+
+run_check $SUDO_HELPER "$nullb" rm "${name}"