btrfs-progs: tests/convert: ensure btrfs-convert won't rollback the filesystem after...

Signed-off-by: Qu Wenruo <wqu@suse.com>
[ add shell quotes, rename test ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/tests/convert-tests/015-no-rollback-after-balance/test.sh b/tests/convert-tests/015-no-rollback-after-balance/test.sh
new file mode 100755 (executable)
index 0000000..47c9c6f
--- /dev/null
+++ b/tests/convert-tests/015-no-rollback-after-balance/test.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# Check if btrfs-convert refuses to rollback the filesystem, and leave the fs
+# and the convert image untouched
+
+source "$TOP/tests/common"
+source "$TOP/tests/common.convert"
+
+setup_root_helper
+prepare_test_dev
+check_prereq btrfs-convert
+check_global_prereq mke2fs
+
+# convert_test_prep_fs() will create large enough file inside the test device,
+# that's good enough for us to test rollback failure.
+convert_test_prep_fs ext4 mke2fs -t ext4 -b 4096
+run_check_umount_test_dev
+convert_test_do_convert "" 4096
+
+run_check_mount_test_dev
+
+# Now the fs is converted, balance it so later rollback should fail
+run_check $SUDO_HELPER "$TOP/btrfs" balance start --full-balance "$TEST_MNT"
+run_check_umount_test_dev
+
+# rollback should fail
+run_mustfail "rollback fs after balance" "$TOP/btrfs-convert" -r "$TEST_DEV"
+
+# Ensure the fs and convert image can pass the check
+run_check "$TOP/btrfs" check "$TEST_DEV"
+
+run_check_mount_test_dev
+run_check $SUDO_HELPER e2fsck -fn "$TEST_MNT/ext2_saved/image"
+run_check_umount_test_dev