btrfs-progs: tests: add 010-convert-delete-ext2-subvol

Testcase for "Btrfs-progs: fix btrfs-convert rollback to check
ROOT_BACKREF", make sure we don't try a rollback if the ext2_subvol is
half-deleted.

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

diff --git a/tests/misc-tests/010-convert-delete-ext2-subvol/test.sh b/tests/misc-tests/010-convert-delete-ext2-subvol/test.sh
new file mode 100755 (executable)
index 0000000..4893647
--- /dev/null
+++ b/tests/misc-tests/010-convert-delete-ext2-subvol/test.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# verify that convert rollback finds the ext2_subvolume intact and fails if it
+# was partially deleted
+
+source $TOP/tests/common
+
+check_prereq btrfs-convert
+check_prereq btrfs
+setup_root_helper
+prepare_test_dev
+
+run_check truncate -s 2G "$TEST_DEV"
+run_check mkfs.ext4 -F "$TEST_DEV"
+run_check $TOP/btrfs-convert "$TEST_DEV"
+run_check $TOP/btrfs-debug-tree "$TEST_DEV"
+run_check_mount_test_dev
+run_check $SUDO_HELPER $TOP/btrfs subvolume delete -c "$TEST_MNT/ext2_saved"
+run_check_umount_test_dev
+run_check $TOP/btrfs-debug-tree "$TEST_DEV"
+run_check_stdout $TOP/btrfs-convert --rollback "$TEST_DEV" |
+       grep -q 'is it deleted' || _fail "unexpected rollback"
+
+exit 0