[2/2] btrfs-progs: tests/convert: Introduce test case to ensure btrfs-convert won't rollback the filesystem after balance

Commit Message

Qu Wenruo Nov. 29, 2017, 1:48 p.m. UTC

Signed-off-by: Qu Wenruo <[e-mail]>
---
 .../015-not-to-rollback-after-balance/test.sh      | 33 ++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100755 tests/convert-tests/015-not-to-rollback-after-balance/test.sh

Patch

diff --git a/tests/convert-tests/015-not-to-rollback-after-balance/test.sh b/tests/convert-tests/015-not-to-rollback-after-balance/test.sh
new file mode 100755
index 000000000000..0d523d2250db
--- /dev/null
+++ b/tests/convert-tests/015-not-to-rollback-after-balance/test.sh
@@ -0,0 +1,33 @@ 
+#!/bin/bash
+# Check if btrfs-convert refuse to rollback the filesystem, and leave
+# the btrfs 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 the fs 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