btrfs-progs: tests: add test case for subvolume create multiple arguments

The test case would verify the following behaviors:

- Partial failure
  Should return 1, but the remaining valid destinations would still be
  created.

- All success
  That's as usual.

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

tests/cli-tests/021-subvolume-multiple-arguments/test.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# Create subvolume with multiple destinations
+
+source "$TEST_TOP/common" || exit
+
+setup_root_helper
+prepare_test_dev
+
+run_check_mkfs_test_dev
+run_check_mount_test_dev
+
+# Create one invalid subvolume with 2 valid ones.
+# The command should return 1 but the 2 valid ones should be created.
+run_mustfail "should report error for any failed subvolume creation" \
+	$SUDO_HELPER "$TOP/btrfs" subvolume create \
+	"$TEST_MNT/non-exist-dir/subv0" \
+	"$TEST_MNT/subv1" \
+	"$TEST_MNT/subv2"
+
+run_check $SUDO_HELPER stat "$TEST_MNT/subv1"
+run_check $SUDO_HELPER stat "$TEST_MNT/subv2"
+
+# Create multiple subvolumes with parent
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create -p \
+	"$TEST_MNT/non-exist-dir/subv0" \
+	"$TEST_MNT/subv1/subv3" \
+	"$TEST_MNT/subv4" \
+
+run_check $SUDO_HELPER stat "$TEST_MNT/non-exist-dir/subv0"
+run_check $SUDO_HELPER stat "$TEST_MNT/subv1/subv3"
+run_check $SUDO_HELPER stat "$TEST_MNT/subv4"
+
+run_check $SUDO_HELPER "$TOP/btrfs" subvolume create -p "$TEST_MNT/dir3/dir1/./..//.///subv3//////"
+run_check $SUDO_HELPER stat "$TEST_MNT/dir3/dir1"
+run_check $SUDO_HELPER stat "$TEST_MNT/dir3/subv3"
+run_check find "$TEST_MNT" -ls
+run_check_umount_test_dev