btrfs-progs: misc-tests: add a test case to make sure uuid is correctly reported

The new test case will execute "btrfs subvolume list -u" on the newly
create btrfs.

Since the v0 root item is already deprecated for a long time, newly
created btrfs should be already using the new root item, thus "btrfs
subvolume list -u" should always report the correct uuid.

The test case relies on external program "uuidparse" which should be
provided by util-linux.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

tests/misc-tests/056-subvolume-list-uuid/test.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+#
+# Make sure "btrfs subvolume list -u" shows uuid correctly
+
+source "$TEST_TOP/common"
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+check_global_prereq uuidparse
+
+setup_root_helper
+prepare_test_dev
+
+tmp=$(_mktemp_dir list_uuid)
+
+run_check_mkfs_test_dev
+run_check_mount_test_dev
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create "$TEST_MNT/subv1"
+run_check_stdout $SUDO_HELPER "$TOP/btrfs" subvolume list -u "$TEST_MNT" | \
+	cut -d\  -f9 > "$tmp/output"
+
+result=$(cat "$tmp/output" | uuidparse -o TYPE -n)
+rm -rf -- "$tmp"
+
+if [ "$result" == "invalid" ]; then
+	_fail "subvolume list failed to report uuid"
+fi
+run_check_umount_test_dev