btrfs-progs: test: add new cli-test for subvol get/set-default

Add new test to check functionality of subvol get/set-default.

Signed-off-by: Tomohiro Misono <misono.tomohiro@jp.fujitsu.com>
[ fix style issues, add missing SUDO_HELPER ]
Signed-off-by: David Sterba <dsterba@suse.com>

tests/cli-tests/008-subvolume-get-set-default/test.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+# test for "subvolume get-default/set-default"
+
+check_default_id()
+{
+	id=$(run_check_stdout $SUDO_HELPER "$TOP/btrfs" subvolume get-default .) \
+		|| { echo "$id"; exit 1; }
+	if $(echo "$id" | grep -vq "ID $1"); then
+		_fail "subvolume get-default: default id is not $1, but $id"
+	fi
+}
+
+source "$TOP/tests/common"
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+setup_root_helper
+prepare_test_dev
+
+run_check "$TOP/mkfs.btrfs" -f "$TEST_DEV"
+run_check_mount_test_dev
+cd "$TEST_MNT"
+
+check_default_id 5
+
+# check "subvol set-default <subvolid> <path>"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create sub
+id=$(run_check_stdout "$TOP/btrfs" inspect-internal rootid sub)
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume set-default "$id" .
+check_default_id "$id"
+
+run_mustfail "set-default to non existent id" \
+	$SUDO_HELPER "$TOP/btrfs" subvolume set-default 100 .
+
+# check "subvol set-default <subvolume>"
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create sub2
+id=$(run_check_stdout "$TOP/btrfs" inspect-internal rootid sub2)
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume set-default ./sub2
+check_default_id "$id"
+
+run_check $SUDO_HELPER mkdir sub2/dir
+run_mustfail "set-default to normal directory" \
+	$SUDO_HELPER "$TOP/btrfs" subvolume set-default ./sub2/dir
+
+cd ..
+run_check_umount_test_dev